With the increasingly mature production technology of laboratory equipment in my country, more and more university laboratories have begun to use rotary evaporators. The rotary evaporator is a device that uses a rotary evaporation bottle to increase the evaporation area and place it in a water bath under reduced pressure while rotating and heating, so that the solution in the bottle is diffused and evaporated.
Food Freeze Dryer is currently a more advanced method of material dehydration, the technology is water-containing substances frozen at low temperatures, and then make the water in the vacuum state directly sublimation, and condensation method to capture the sublimation of water vapour, to achieve the purpose of material dehydration and drying. After the food freeze dryer of the material, its physical, chemical and biological state is basically unchanged, the material in the volatile components and heat denaturation of the loss of nutrients is very small, after freeze drying of the material is porous, its volume is basically the same as before drying. Therefore, after adding water, due to the large contact area, it can be recovered very quickly and has a longer preservation period in the sealed container.
The fermentation performance of a closed solid-state fermentation system depends largely on factors such as mass transfer phenomena , biological reaction rates , and effective bioreactor system design and operation , and it is very important to precisely control various factors to the appropriate range.
Astaxanthin is a kind of red pigment widely found in living organisms, with very strong antioxidant properties. Natural astaxanthin is known as the "king of antioxidants" in the 21st century, its antioxidant capacity is 6,000 times that of vitamin C and 1,000 times that of vitamin E.
This article provides a comprehensive understanding of water content determination in petroleum products, including sources, forms, hazards, and methods of measurement. It emphasizes the importance of accurate water content analysis for ensuring product quality and preventing performance issues in various industries such as petroleum, chemicals, power, and more.
Rotary Vane Vacuum Pump and Liquid Ring Vacuum Pump are two common types of vacuum pumps. They have some differences in terms of working principle, application fields, advantages and disadvantages, etc.
Molecular distillation and thin-film evaporator are two different separation technologies. They have different working principles, different application scopes, different energy consumption and costs, different separation efficiency and separation purity, and different application scenarios.
The solid-state fermentation tank has six functions of material dry mixing, wet mixing, sterilization, inoculation, fermentation, and mechanical discharge. The in-situ continuous operation in the tank, especially after the material is sterilized, the inoculation and fermentation processes can It is an ideal multi-functional solid fermentation equipment, which is carried out in a sterile state. It is suitable for biological preparation products with good bacterial strain resistance and loose solid medium material, which is not easy to gelatinize.
Ultrasonic dispersers and ultrasonic crushers are both ultrasonic equipment, which use ultrasonic technology to achieve the dispersion, crushing or mixing of substances. However, they are different in design, working principle, operation mode and application field.
A vacuum pump refers to a device or device that uses mechanical, physical, chemical or physicochemical methods to evacuate the evacuated container to obtain a vacuum. Generally speaking, a vacuum pump is a device that uses various methods to improve, generate and maintain vacuum in a certain closed space.
The greatest therapeutic drug in the 20th century is antibiotics (Antibiotic), which is a kind of anti-pathogen or other activity produced by microorganisms (including bacteria, fungi, actinomycetes) or higher animals and plants in the course of life. Secondary metabolites, chemicals that interfere with the developmental functions of other living cells. Antibiotics are often highly sensitive to heat and other environmental factors, so freeze-drying techniques are commonly used to stabilize antibiotics without affecting their physical structure and effectiveness. Common antibiotics, such as some semi-synthetic penicillins, cephalosporins, and some salts of erythromycin, doxycycline, and chloramphenicol, are made by freeze-drying.
Glass reactor is a kind of experimental equipment widely used in chemistry, biology and materials science. It has the advantages of strong corrosion resistance, high transparency and easy cleaning, so it has been widely used in many fields. This article will introduce the application fields of glass reactors and their important roles in related fields.
The ultra-low temperature circulating cooler is an important equipment used to achieve ultra-low temperature conditions in the fields of scientific research, pharmaceutical manufacturing, and industrial production. To ensure long-term reliable operation and efficient performance of this equipment, here are some maintenance tips and industry applications.
The horizontal sterilizer is widely used and the effect is reliable. The principle of the horizontal sterilizer is mainly to denature biomolecules such as proteins. When the high-temperature and high-pressure steam fully contacts the sterilized items, the latent heat is released, thereby heating the sterilized items. Heating accelerates the movement of protein molecules, collides with each other, and breaks the secondary bonds connecting the peptide chains, making the molecules change from a regular and tight structure to a disordered and warm structure. A large number of hydrophobic groups are exposed on the surface of molecules, which combine with each other to form larger polymers, and solidify the precipitate. The horizontal sterilizer irreversibly destroys enzymes and structural proteins, thereby killing microorganisms and sterilizing items.
Class II biological safety cabinets can prevent the spread of harmful aerosols and aerosols; provide protection for operators, samples and the environment. A better environment should be selected for the machine before commissioning. It is good to place it in a sterile room with air disinfection facilities. If the conditions are not available, the machine should be placed in a cleaner room with less movement of personnel. Adjust the height of each foot to ensure a stable and level operating surface. A special circuit should be used for the power supply of the workbench to avoid changes in the air flow rate caused by circuit overload.
Infrared spectrometer is an instrument that uses the absorption characteristics of substances to infrared radiation of different wavelengths to analyze molecular structure and chemical composition, and is widely used in many industries. In what fields is the infrared spectrometer suitable? The following editor will introduce the scope of application of the infrared spectrometer in detail, hoping to help everyone.
Explosion-proof glass reactor is a kind of equipment widely used in chemical laboratories. It is mainly used for high-pressure, high-temperature and high-reactivity chemical reactions. Since there may be dangers such as explosion or fire during the reaction process, the use of explosion-proof glass reactors can effectively guarantee the safety of the laboratory. The following will introduce its principles, characteristics and applications.
When animal cells or tissues leave the body to be cultured outside the body, it is necessary to provide them with various nutrients required for growth and various reagents required for better cell growth in vitro.
Carbon dioxide incubator is a kind of equipment used in biology and biomedical research, which can culture cells or microorganisms under controlled environmental conditions. When using carbon dioxide incubator, we must follow some rules, so as to ensure its effectiveness. and stability, so as to play its wonderful performance.
The explosion-proof airtight high-temperature circulator uses oil as the heating medium. The oil in the tank is pumped out of the machine through a stainless steel circulating pump to establish a second constant temperature field. The instrument is equipped with an external circulation interface, which can be connected to other experimental equipment.
As the basic equipment of the laboratory, the laboratory ultrapure water machine brings high efficiency and convenience to scientific researchers. However, some users only stay at the level of usage, and still don't know much about the device. Some users still have many misunderstandings in the process of using the device.
High and low temperature experimental equipment is a device that can provide high-temperature and low-temperature circulating liquids for other experimental equipment. It has the advantages of fast heating and cooling, precise temperature control, and simple operation. It is an ideal equipment for pilot tests in modern laboratories.
The incubator is a very common laboratory instrument, but we often encounter various incubators, such as: constant temperature incubator, constant temperature and humidity incubator, carbon dioxide incubator, anaerobic incubator, mold incubator, light incubator etc.
Dryer refers to a mechanical device that uses heat energy to reduce the moisture content of materials. It is used to dry objects. Usually, there are adsorption dryers, spray dryers, and freeze dryers. As common drying equipment, freeze dryers and spray dryers have many differences, but few people know the following three differences.
Laboratory autoclaves can be considered similar to ovens, but they use high-temperature steam instead of dry heat. The steam is usually pressurized to a temperature between 121 and 131 degrees Celsius, which is the ideal steam temperature for sterilizing objects.
A fermenter is a device used for microbial fermentation, which can improve fermentation efficiency by optimizing the fermentation conditions of microorganisms. According to the aerobic and anaerobic properties of the cultured microorganisms, fermenters can be divided into aerobic and anaerobic types. The control system of the fermenter mainly achieves the purpose of controlling the process parameters of the entire fermenter by controlling thermal and biochemical parameters. So in the process of daily use, how should we maintain it?
Similar to the structure of the rising film vacuum concentration equipment, the falling film evaporator is composed of a heater, an evaporation separation chamber, a partition condenser, a vacuum pump, a condensate pump, a sterilization balance tank, a heat pump and a thermal instrument.
The three-layer glass reactor is mainly used for experiments such as material distillation, synthesis, and concentration. The kettle can be pumped to a negative pressure state to meet different experimental conditions. The uniform dropwise addition of materials can be controlled through the constant pressure funnel or the valve on the feeding bottle; the distillation or reflux of the solvent can be realized by using the heat exchange function of the condenser.
UV spectrophotometer is an effective means to study the composition, structure and interaction between substances according to the absorption spectrum of substances. The UV spectrophotometer can arbitrarily select different wavelengths of light in the ultraviolet-visible region. The absorption spectrum of a substance is the result of the molecules and atoms in the substance absorbing the light energy of certain wavelengths in the incident light, and correspondingly, the molecular vibration energy level transition and the electronic energy level transition occur. Since various substances have different molecules, atoms and different molecular space structures, their absorption of light energy will not be the same. Therefore, each substance has its own unique and fixed absorption spectrum curve, which can be determined according to the absorption The absorbance at certain characteristic wavelengths on the spectrum can be used to judge or measure the content of the substance.
LABOAO has been engaged in the production and sales of laboratory equipment for many years,
and has rich experience in laboratory equipment. The following management methods of laboratory equipment hope to provide you with some references and ideas.
Spray drying is a drying method that uses an atomizer to disperse the raw material liquid into droplets, and uses hot gas (air, nitrogen or superheated steam) to dry the droplets to obtain a drying method. The raw material liquid can be a solution, an emulsion, a suspension, or a melt or a paste. The dry product can be made into powder, granule, hollow sphere or pellet as required.
Centrifuge is a machine that uses centrifugal force to separate components from liquid and solid particles or a mixture of liquid and liquid. Centrifuges are mainly used to separate solid particles and liquids in suspension, or to separate two liquids in emulsions that have different densities and are incompatible with each other.
Fume hoods are ventilated enclosures that remove hazardous chemical fumes and volatile vapors from a laboratory, providing only personnel protection. Biosafety cabinets utilize HEPA filters to provide environmental, personnel and/or product protection.
Depending on your application, they can recirculate or exhaust filtered air and are suitable for dealing with harmful particles such as bacteria and viruses.
High and low temperature experimental equipment is a device that can provide high-temperature and low-temperature circulating liquids for other experimental equipment. It has the advantages of fast heating and cooling, precise temperature control, and simple operation. It is an ideal equipment for pilot tests in modern laboratories.
The small low-temperature spray dryer is mainly suitable for the production of micro particle powder in the laboratories of universities, research institutes and food, pharmaceutical and chemical enterprises. It has broad-spectrum applicability to all solutions such as emulsions and suspensions, and is suitable for drying heat-sensitive substances such as Biological products, biological pesticides, enzyme preparations, etc., because the sprayed materials are only subjected to high temperature when they are sprayed into mist-sized particles, so they are only heated instantaneously, and these active materials can maintain their active components after drying.
Laboratory water purifiers are widely used in technological fields such as scientific research, chips, semiconductors, hospitals, and biological research. Moreover, with the passage of time, its application range has become wider and wider, and it has gradually been accepted by more industries. So what details should be paid attention to when installing the laboratory pure water machine? How should I use it after installation? Here we take a look!
Spray granulation dryer is a kind of drying equipment that can produce products after fluidization, dust removal, atomization, solidification and other treatments are performed on materials to meet the particle size requirements. The process is generally that the air enters the bottom of the fluidized bed after being heated by a heater, and passes through the distribution plate to contact with the material to make the material fluidized. The mother liquid or binder is sent to the atomizing nozzle by the pressure-making equipment such as the pressure pump, and after atomization, it is coated on the surface of the fluidized particles or the particles are bonded to each other. After continuous fluidization, coating, and drying, the particles gradually grow After reaching the required particle size, it is discharged from the outlet of the fluidized bed.
The light incubator has the function of ultra-temperature sensor abnormality protection to ensure the safety of instruments and samples; the optional full-spectrum plant growth lamp is conducive to the growth of plants and improves disease resistance. With power-down memory, power-down time automatic compensation function; constant temperature control system, fast response, high temperature control accuracy.
Incubator refers to a temperature-controllable box device mainly used for culturing microorganisms, plants and animal cells. It is the basic experimental equipment for scientific research departments such as biology, agriculture, medicine, and environmental protection. It is widely used in constant temperature culture, constant temperature reaction and other experiments.
In biochemical experiments, it is often necessary to separate two or more liquid mixtures, which requires the help of professional laboratory equipment. This article will take stock of the most common liquid-liquid separation equipment.
The carbon dioxide incubator simulates the formation of a cell / tissue-like growth environment in the body of the incubator. The carbon dioxide incubator simulates the formation of a cell / tissue-like growth environment in the body of the incubator.
Today, companies use laboratories in many ways. Moreover, due to tight budgets, limited space, and changing business dynamics and security considerations, companies sometimes have difficulty choosing when purchasing laboratory furniture. When you need to buy a chemical fume hood for a new laboratory or redesign, you need to make an important decision.
The common names of muffle furnaces are as follows: electric furnace, resistance furnace, muffle furnace. Muffle furnace is a kind of general heating equipment in laboratory, which can be divided into box furnace, tube furnace, crucible furnace and so on according to the appearance and shape.
The in-situ freeze dryer adopts the separate design of the drying chamber and the cold trap, and uses silicone oil as the heat transfer medium, which not only saves energy, but also has a fast production speed (equipped with electric defrosting) and is easy to clean.
Quadrupole mass spectrometer is one of the most mature and widely used small mass spectrometers. The quadrupole is one of the most commonly used mass analyzers in gas chromatography-mass spectrometry (GC/MS) and liquid chromatography-mass spectrometry (LC/MS).
The centrifuge rotor is designed so that the base is uniform, so that it is closely attached to the motor shaft. When installing the rotor, dirt particles do not adhere to the rotor of the motor shaft and cause unevenness. Be sure to regularly grease the shaft of the rotor to allow easier removal in the future to prevent metal-to-metal bonding on the motor shaft.
The laboratory centrifuge is used for centrifugal sedimentation separation, that is, the centrifugal force generated by the high-speed rotation of the centrifuge is used to make the precipitated particles or droplets with large mass in the liquid thrown to the bottom to achieve the purpose of separation.
With the increasing emphasis on quality work, quality control is more from empirical control to parameter control, and the use of atomic absorption spectrophotometers has become increasingly widespread.
Spectrophotometry is often used in measurements of enzyme activities, determinations of protein concentrations, determinations of enzymatic kinetic constants, and measurements of ligand binding reactions.
Polypeptide is a chemical substance composed of amino acids, which is ubiquitous in organisms. Up to now, tens of thousands of polypeptides have been found in organisms, and it has extensive biological activity and good safety.
Airlift fermenters are widely used biological reaction equipment. This type of bioreactor has the advantages of simple structure, not easy to contaminate bacteria, high efficiency of dissolved oxygen, and low energy consumption.
Microbial fermenters are suitable for microbial culture tanks. Dissolved oxygen value is a key parameter in microbial culture. The dissolved oxygen level will affect the growth of microorganisms, the rate of intracellular chemical reactions, and the synthesis of intracellular compounds.
The fermented product is called a fungus bag. Sometimes there is a situation where the fermenter is contaminated with bacteria and the bacteria bag is not detected. This is the most troublesome problem in production.
Among the glass reactors, we know single-layer glass reactor and double-layer glass reactor. The single layer is heated and cooled by a bath, and the double layer is cooled or heated by a glass interlayer. So why do customers need to choose three-layer glass reactor?
There is no agitator in the fermentation tank for bacteria and cells, and there is a guide tube in the center, which divides the fermented mash into an ascending area (inside the guide tube) and a descending area (outside the guide tube). Air nozzles, or annular air distribution pipes, are installed in the lower part of the ascending area, and there are many nozzle holes below the air distribution pipes.
A ventilation fermentation stirring device comprises a motor, a transmission device, a stirring shaft, a shaft sealing device and a stirring paddle.The purpose of mechanical agitation is to quickly disperse air bubbles and mixed materials.
Biological shaker, sometimes called shaker incubator. It is mainly used for cell culture and mixing in the fields of biology, medicine, microbiology, and genetic engineering. The shaker is divided into the water bath shaker and the air bath shaker. The water bath shaker is heated by placing a glass of water. The air bath shaker is mainly heated by air. The temperature range of the water bath shaker is 0-100 degrees, and the temperature range of the air bath shaker is 0-60 degrees.
The airlift loop bioreactor has no agitator in the tank, but there is a guide tube in the center, which divides the fermentation tank liquid into an ascending area (inside the guide tube) and a descending area (outside the guide tube).
Bioreactor refers to any manufacturing or engineering equipment that provides a biologically active environment, and utilizes the biological functions of enzymes or organisms to carry out biochemical reactions in vitro. It is a biological function simulator, such as a fermenter, immobilized enzyme or immobilized cell reactor, etc.
The operation of the fermenter is very strict. There are many process parameters, so It is very important how to control the parameters in the fermenter process. Today we will talk about temperature control and PH value control.
As the demand for fermented products increases, the use of bioreactor fermenters is also increasing. In order to ensure the fermentation effect, the maintenance of bioreactors valve is very important.With the improvement of fermentation process control, detection of rotary water spray agitation and air aseptic treatment technology, the volume increase of cell bacterial bioreactor has become a trend in the antibiotic industry.
Essential oils, also known as volatile oils, are a general term for oily liquids with aromatic odors in plants. They are widely used in medicine, nursing, and daily food. There are more than 300 kinds of wild and cultivated aromatic and medicinal plants containing essential oils in China, but the amount of essential oils in plants is generally less than 1%. The extraction and separation of plant essential oils has become a research hotspot in this industry.
Thin-film evaporator is a type of single-pass evaporator. That is, the material is heated along the tube wall in the evaporator into a film-like flow, and the required concentration can be achieved by passing through the heating chamber once, and the residence time is only a few seconds or ten seconds. It has the advantages of high heat transfer efficiency, fast evaporation speed and short material residence time. Especially suitable for the evaporation of heat-sensitive materials.
Biochemical incubators and mold incubators are common constant temperature incubator equipment in laboratories. The functional parameters of these two incubators are relatively similar, so it is easy to cause confusion. This article mainly introduces the difference between biochemical incubators and mold incubators from the aspects of functional differences and uses.
Ultrasonic thickness gauge can be widely applied to the detection fields of manufacturing, metal processing, chemical industry, commodity inspection and so on. Ultra sonic thickness machine is suitable for measuring the thickness of various materials which can enable ultrasonic waves to propagate at a constant speed in the interior and can be reflected from the back surface of the ultrasonic waves
The use of constant temperature and humidity incubator is very common in all walks of life, in order to improve the service life of their products, many companies now choose to purchase constant temperature and humidity incubator or other environmental test equipment for testing. There will be some small problems after a long period of use, the common faults of the constant temperature and humidity incubator and solution will be provided.
The Kjeldahl method was first proposed in 1883 by the Danish chemist Kedall. Due to the simple equipment requirements, it has become a classic method for protein determination since it was proposed, and is widely used in protein detection. The Kjeldahl method can only convert organic nitrogen into inorganic ammonium through high-temperature digestion with sulfuric acid, while nitrate nitrogen (such as nitrate and nitrite) cannot be converted.
The vacuum drying oven is specially used for powder drying, baking and disinfection or sterilization of various glass containers in the research and application fields of biochemistry, chemical pharmacy, medical and health, agricultural scientific research, environmental protection, etc.
Pilot freeze dryer is common in daily life. Air freeze-drying technology, referred to as freeze-drying, is also known as sublimation air-drying. Freeze-drying is a specific method of pre-freezing water-containing materials and then subliming them in a vacuum state to obtain air-dried objects. Freeze-dried objects have basically unchanged original biological and chemical properties, and are easy to store for a long time. After soaking in water, it can be restored to the form before freeze-drying, and its original biochemical properties can be maintained. Therefore, freeze-drying technology is widely used in various fields such as industrial chemistry and medical equipment.
Bioreactor refers to any manufacturing or engineering equipment that provides a biologically active environment, and uses the biological functions of enzymes or organisms to carry out biochemical reactions in vitro. It is a biological function simulator, such as a fermenter, a fixed enzyme or immobilized cell reactor, etc.
Freeze Dryer is widely used in medicine, pharmacy, biology research, chemical industry and food production, etc. After the freeze drying process, a long term preservation is much easier. They can be restored to the original state and maintain their chemical and biological characteristics after freeze dried.
The cryogenic coolant circulation pump is a combination of a circulating pump and a cryogenic cooling pump. It is a good auxiliary equipment for vacuum distillation and vacuum concentration. It is especially adapted to be equipped with a rotary evaporator, which not only reduces the use space, but also reduces the vacuum degree and saves water resources. It is widely used in modern laboratories.
With the development of the times, ultra-pure water machines have gradually become an indispensable part of our lives. Ultra-pure water machines are easy to operate, cost-effective, safe and reliable. What is the working principle of super pure water machines? What details should be paid attention to when using it? Let's talk it together.
Water bath constant temperature oscillator, also known as water bath constant temperature shaker, adopts high-quality fully enclosed compressor with large cooling capacity. The box is equipped with fans and devices to force air convection, and the temperature distribution is more uniform. The water bath constant temperature shaker adopts the principle of electromagnetic oscillation, which is similar to the principle of induction cooker. It generates alternating magnetic field through the electronic circuit board components. The stainless steel container cuts the alternating magnetic field lines to generate alternating current. The eddy current causes iron molecules on the container wall. High-speed random movement, molecules collide and rub against each other to generate heat energy. At the same time, due to the existence of eddy current, the water molecules are acted by electromagnetic force to drive the liquid in the glass container to move, achieving the effect of vibration.
With the continuous improvement of our living standards and quality, people have higher and higher expectations for the quality and effects of cosmetics in recent years. Because we can use a vacuum freeze dryer to obtain biological preparations at ultra-low temperature, which will promote the development of cosmetics towards a purely natural and functional orientation. In addition, a vacuum freeze dryer is used to produce cosmetics, which can preserve the activity, ingredients and quality of biological agents.
Because vaccine is a special medicine, it has strict cold chain requirements in transportation and storage. It is understood that Pfizer mRNA vaccine can be stable for 6 months during storage and transportation at -70°C, while it can only be maintained for 5 days at 2-8°C. Moderna vaccine has better storage and transportation stability. It can be stored and transported at -20°C and can be stable for 6 months; after thawing, it can be kept stable for 30 days in a standard household or medical refrigerator at 2-8°C. The temperature for transportation and storage of inactivated vaccines of Sinopharm Biologics is required to be within 2~8°C.
The water distiller uses electricity to heat tap water to produce pure water. Distilled water is prepared using the principle of liquid vaporization when heated and liquefaction when cold. The water distillers used in laboratories and other departments are generally made of high-quality stainless steel materials and processed after special treatment. This not only fully guarantees the quality of distilled water, but also greatly improves the service life.
In the glass reactor, we know that there is a single layer or a double layer. The single layer is heated and cooled by a bath, and the double layer is cooled or heated by a glass interlayer. Through the following we come to understand the lower three-layer glass reactor.
The closed high-temperature circulator is widely used for drying, concentrating, distilling, and impregnating chemical reagents. Connecting the external circulation pipeline can provide a constant temperature heat source for glass reactors, vacuum reactors and other equipment. It can also be used for constant temperature heating in water baths and other temperature tests. It is a must-install tool for education and scientific research in biology, genetics, viruses, aquatic products, environmental protection, medicine, health, biochemical laboratories, and analysis rooms. It is widely used in reactor assembly devices that require high temperature conditions in the pharmaceutical, chemical, and petrochemical industries.
At the moment, the pandemic has not stopped. It has completely destroyed the lives of people all over the world. Therefore, the eyes of the whole world are focused on scientists and their research. This is our all hope for returning to normal life and work. The new coronavirus vaccine launched by Pfizer in the US needs to be stored at a very low temperature (-80°C), while the new coronavirus vaccine in my country needs to be stored at 2°C to 8°C.
PCR (polymerase chain reaction) is an extremely important tool in molecular biology research. It has been widely used by laboratories all over the world for a variety of experimental applications, such as molecular cloning, gene expression analysis, genotyping, sequencing, and mutation. The four types of PCR instruments commonly used in the laboratory are: ordinary PCR, gradient PCR, in-situ PCR, and fluorescence quantitative PCR. What are the differences between them? The following content will help you answer:
The closed high-temperature circulator adopts electric heating, and the material in the supporting reaction vessel is heated by the heat transfer fluid output by the circulating pump. It is widely used in the reactor assembly device that requires high-temperature conditions in the pharmaceutical, chemical, and petrochemical industries.
How to choose the vacuum pump used in the laboratory is a problem that plagues many users. After buying a vacuum pump, many users will encounter the vacuum gauge to observe that the vacuum is not enough (not enough suction), the pumping speed is too slow, and it is used in a relatively closed room. Excessive noise, or oil mist when the pump is in use, can not be used normally, and other problems. These problems are often related to the selection.
Autoclave sterilization is a commonly used method of sterilization in laboratories, adding 100Mpa-1000Mpa pressure to the items to be sterilized for a period of time, and using high pressure to inactivate the bacteria, thereby killing the microorganisms in the items. High-pressure sterilizers are widely used in the sterilization of equipment, dressings, utensils, liquid medicine, culture medium and other items in institutions of higher learning, medical and health, food chemical industry, and biological research.
The incubator has a two-way temperature control system for refrigeration and heating, and a temperature controllable function. It is an indispensable laboratory equipment for scientific research in plants, biology, microbes, genetics, medicine, and environmental protection. It is widely used in low temperature and constant temperature tests, Cultivation test, environmental test, etc. Biochemical incubator and constant temperature incubator are the two most commonly used. The same is the incubator. What is the difference?
The original design was designed to reflect and refract the medium when it propagates through the ultrasonic wave when it encounters the medium. If there are no defects in the material, the other end of the material propagated by the ultrasonic wave will be reflected. After being captured by the probe, according to the sound speed and actuality of the wave in the material The time spent between the transmitted wave and the received echo during the inspection to determine the thickness of the material. If there is a defect, there will also be a reflected echo, which will be captured by the probe. Then the defect echo will return more than the other side (bottom) of the material Wave travel is short, and it can be judged whether a defect is formed by being reflected on the equipment.
As the requirements for cryopreservation of items become more and more refined, the purchase of ultra-low temperature storage boxes has become an important task in the scientific research, medical and food industries. During the sales process, we found that many customers are not clear about the purchase of ultra-low temperature storage boxes Often, after purchasing, it is found that the temperature deviation is too large, the storage box cannot enter the room, and too many items cannot be placed. Let me learn how to choose a suitable ultra-low temperature refrigerator:
Centrifuge will produce RCF during operation. Due to sedimentation caused by RCF make the subject dangling in the solution to form precipitation. The substance of the more proportion turned the direction of the largest radius rotor, the lighter substance is on heavier substance and let the subjects of different proportion to be separated hierarchically.
The ultrasonic thickness gauge measures the thickness according to the ultrasonic pulse reflection principle. When the ultrasonic pulse emitted by the probe passes through the measured object to reach the material interface, the pulse is reflected back to the probe to accurately measure the time the ultrasonic wave propagates in the material to determine Measure the thickness of the material. Various materials that enable ultrasonic waves to propagate inside at a constant speed can be measured using this principle.
When using a laboratory shaker, be sure to follow the instructions of the laboratory shaker before, during, and after installation to avoid unnecessary equipment failure. In order to operate the equipment, please also follow the following requirements:
Accurate thickness strain measurement using an ultrasonic thickness gauge requires a higher level of detail during the measurement process. In an ultrasonic thickness gauge, the transducer measures the time between the ultrasonic waves sent through the sheet metal and the echoes that are bounced back from the back surface of the sheet. The detection of defects is discovered by receiving echoes that bounce back from the internal point of the sheet metal. In the measurement process using the ultrasonic thickness gauge, the following aspects should be noted:
Ultrasonic flaw detector is a relatively sophisticated electronic instrument that has certain applications in many industries. In order to reduce the occurrence of instrument failure, extend the life of the instrument, and keep the instrument in good working condition, attention should be paid to the maintenance of the instrument. If it is not used for a long time, re-use will result in errors in the measurement data, which are caused by improper maintenance during storage.
Ultra-low temperature refrigerator equipment is scarce due to refrigerant quality, expensive, complicated equipment structure and high maintenance cost. Ultra-low temperature refrigerators are often damaged, mostly due to improper use and maintenance. The maintenance and maintenance of ultra-low temperature refrigerators is especially important for extending their life and normal use. If the temperature control is inaccurate, the objects to be preserved are often damaged, which has a great impact on the experimental results, thus affecting the normal work of the research. In the summer, the equipment is in a high-risk period. In order to ensure the normal operation of the ultra-low temperature refrigerator and prevent equipment damage, it is recommended to pay attention to the following points:
Laboratory ventilation is an integral part of laboratory design. The most important function of the fume hood is the exhaust function. In the chemical laboratory, all kinds of harmful gases, odors, moisture and flammable, explosive and corrosive substances are generated during the experimental operation, in order to protect the safety of users. To prevent the spread of pollutants in the laboratory to the laboratory, use a fume hood near the source of pollution.
In recent years, due to the development of centrifuge technology at home and abroad, centrifugal separation technology has also undergone several generations of changes, from medical centrifuges, low-speed freezing centrifuges, high-speed centrifuges to high-speed freezing centrifuges, ultra-large capacity freezing centrifuges, ultra-speed centrifuges, ultra-speed freezing centrifuges and intelligent high-speed freezing centrifuges.
High-speed centrifuges are widely used in different fields, especially in scientific research-related work. The use of such equipment can have very unexpected effects. Therefore, high-speed centrifuges have made great contributions in medicine and biological products.
Muffle is the meaning of the package, furnace is the furnace, the meaning of the furnace. The general name of muffle furnace in China is as follows: electric furnace, electric resistance furnace, Muffle furnace is a general-purpose heating equipment, which can be divided into box furnace, tube furnace and furnace according to the shape of appearance. How is the muffle furnace safe to operate?
Liquid nitrogen tanks are mainly used to store liquid nitrogen, which is convenient for the transportation of liquid nitrogen. Now there are more and more industries using liquid nitrogen tanks, such as metal materials refrigeration and medical treatment.
The glass reactor commonly used in the laboratory passes through the reaction vessel interlayer, injects a constant temperature (high temperature or low temperature) hot-dissolving medium or a cooling medium, and the material in the reaction kettle is heated or cooled at a constant temperature, and stirring can be provided. The material is reacted in the reaction kettle, and the evaporation and reflux of the reaction solution can be controlled. After the reaction is completed, the material can be discharged from the discharge port of the bottom of the kettle, and the operation is convenient. It is an ideal equipment for modern chemical samples, sample experiments, biopharmaceuticals and new materials.
UV-visible spectrophotometers are widely used in pharmaceutical, medical, chemical, energy, machinery, metallurgy, environmental protection, geology, food, biology, materials, agriculture, forestry, fisheries and other industries, in higher education, metrology science and research institutes. The teaching, research fields, as well as quality control in production, raw materials and product testing play an important role, is the analytical instrument commonly used in physical and chemical laboratories.
There are many kinds of reactors including single layer glass reactors, jacketed glass reactors, explosion proof jacketed glass reactors, etc. However, jacketed glass reactors are widely used, and explosion proof jacketed glass reactors are passed through jacketed reactors. The interlayer is injected with a constant temperature (high temperature or low temperature) hot solution or coolant, and the material in the reactor is heated or cooled at a constant temperature, and stirring can be provided.
The constant temperature shaker is made up of various liquid and solid compounds such as biological, biochemical, cell, and bacterial species in various research institutions such as universities, medical, petrochemical, health and epidemic prevention, and environmental testing because of its unique characteristics of oscillation culture. Oscillating culture plays a very large role.
The large capacity high speed centrifuge is a commonly used centrifuge product type with the advantages of stable performance, flexible use, high reliability and easy maintenance. Users are indispensable for the maintenance and maintenance of large-capacity high-speed centrifuges, which can effectively extend the service life of high-capacity high-speed centrifuges. Today we will introduce the maintenance and maintenance methods of high-capacity high-speed centrifuges, hope to help everyone.
The low-temperature coolant circulation pump adds water circulation and cooling function to the water bath, which can improve the precision of temperature control and the stability of water temperature. It can be widely used for drying, concentration, distillation, impregnation of chemical reagents, impregnation of pharmaceuticals and biological products. It can also be used for constant temperature heating and other temperature tests in water baths. It is an indispensable tool for biological, genetic, viral, aquatic, environmental, medical, health, biochemical laboratories, analytical laboratories, and educational research.
The cryogenic coolant circulation pump adopts a cryogenic liquid circulation device that is mechanically cooled. It has the function of providing a cryogenic liquid and a low temperature water bath. Combined with rotary evaporator, vacuum freeze drying oven, circulating water vacuum pump, magnetic stirrer and other instruments, the chemical reaction operation and drug storage under multi-functional low temperature are carried out. It has the functions of providing low temperature constant temperature liquid bath, low temperature constant temperature condensation cooling, low temperature constant temperature storage, establishing a second low temperature constant temperature field, etc., and is widely used in medicine, chemical industry, scientific research experiments and the like.
The glass reactor is an ideal pilot and production equipment for the synthesis of modern fine chemicals, biopharmaceuticals and new materials. The inner layer container of the double-layer glass reactor is placed with the reaction material, and at the same time, vacuum and speed stirring can be performed, and the interlayer can be introduced into the freezing liquid, water or high temperature liquid to heat and cool the material. It is used in experiments, pilot tests and production of chemical, fine chemical, biopharmaceutical new material synthesis. The product can be combined with circulating water vacuum pump, diaphragm vacuum pump, low temperature coolant circulating pump, high and low temperature integrated machine to form a system device.
Large circulating water vacuum pumps are used in many industrial sectors such as petroleum, chemical, machinery, light industry, medicine and food. Circulating water vacuum pumps are widely used in many processes of industrial production, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum regain and vacuum degassing. The use of large circulating water vacuum pumps should not neglect some details. Pay attention to the following when using:
Drying methods are various, such as drying, boiling, drying, spray drying, and vacuum drying, but ordinary drying methods are usually carried out at temperatures above 0 ° C or higher. The products obtained by drying generally have problems of shrinking size and hardening of the texture. Most of the volatile components are lost, some heat-sensitive substances are denatured and deactivated, and some substances are even oxidized. Therefore, the dried product has a large difference in properties compared with that before drying. The freeze drying technology of the laboratory freeze dryer has the following advantages over the advantages of ordinary drying technology:
Refrigerant, also known as refrigerant, is commonly known as snow in some areas of the South. It is a working substance that continuously circulates in a refrigeration system and undergoes its own state change to achieve refrigeration. The refrigerant absorbs heat in the evaporator by heat of a cooling medium (water or air, etc.), and transfers heat to the surrounding air or water in the condenser to condense.
The high pressure steam sterilizer sterilizes the articles to achieve sterility requirements, which is the basic guarantee for microbial experiments. Qualification of the autoclave sterilization is the most fundamental and critical first step in the success of the experiment. Except for a small amount of medium, which only needs to be heated and dissolved, and no autoclaving is required, most of the medium is autoclaved at 121 ° C for 15-30 minutes. In particular, the sterilization of the sterile test medium is not thorough and is directly related to the results of the sterility test on the sample. Therefore, the sterilization effect of the autoclave must be verified. To this end, we provide a simple and feasible method for verifying the effectiveness of sterilization.
The biological safety cabinet is an air purification equipment that provides a local dust-free and sterile working environment, and can artificially control the discharged air in the working area through a special filtering channel to avoid harm to people and the environment. Safe microbiological dedicated clean bench. It can also be applied to related industries such as biological laboratory, medical and health, bio-pharmaceutical, etc., and has good effects on improving process conditions and protecting the health of operators.
The principle of a freeze dryer is a technical method of preliminarily freezing an aqueous article and then sublimating its water under vacuum to obtain a dried article. The freeze-dried articles are easy to store for a long time, and can be restored to the state before lyophilization and retain the original biochemical characteristics after adding water.
Muffle furnace is a kind of equipment used for heating or heat treatment. Because of its advantages such as convenient use, accurate temperature control and fast heating, it is now in the production process of industrial and mining enterprises. In the chemical laboratory of the unit, the use of this furnace is essential, so if you buy a suitable muffle furnace?
The muffle furnace used in the industry is a professional mechanical device, and requires a professional method in the process of use. When you operate the muffle furnace, you need to understand the performance and usage of the muffle furnace and the problems that may arise during use. The muffle furnace can be used very well only when it is hot enough.
The spray dryer sprays the material into droplets and disperses it in hot air. The materials are in contact with the hot air in a cocurrent, countercurrent or mixed flow manner, so that the water evaporates quickly to achieve the purpose of drying. By means of spray drying, unit operations such as concentration, filtration, and pulverization can be omitted, and drying time is short, product fluidity and fast solubility are good, and thus it is widely used in medicine and other industries.
Biosafety cabinets are widely used in health care, disease prevention and control, food hygiene, biopharmaceuticals, environmental monitoring, and various biological laboratories. They are an important foundation for ensuring biosafety and environmental safety. Fume hoods and clean benches are not biosafety cabinets and should not be used in experiments or production processes involving microbial materials.
The distilled water is obtained by electrically heating tap water to obtain pure water. Steam is produced by heating distilled water and condensed into distilled water, which is suitable for use in pharmaceuticals, preparations, laboratories, laboratories, etc.
Laboratory centrifuges are instruments that use centrifugal force generated by a rotating rotor to separate substances of different densities and different particle sizes in a suspension or emulsion, or to perform analysis while separating. It has a wide range of applications and is suitable for use in laboratories such as chemical, food, pharmaceutical, environmental, mining, and teaching. But how to choose a suitable centrifuge should start from the following aspects:
The main uses of modern freeze-drying technology are: freeze-drying storage of in vitro biological tissues; freeze-drying preservation of live bacteria; lyophilization of Chinese herbal medicines, western medicines, biological drugs and blood products; freezing of convenience foods, health foods, functional foods Dry storage and transportation; lyophilization preparation of nano ceramic materials and various metal micropowder materials. Therefore, freeze-drying technology has been widely used in the fields of chemicals, food, materials, medicine, and biological products. Vacuum freeze dryer (referred to as freeze dryer) is a device for realizing freeze-drying technology. It is a complex structure machine involving refrigeration, vacuum, thermal, mechanical, fluid, electrical control and pressure vessels.
The cryogenic centrifuge is a product with a series of centrifuges. In general, for the maintenance of cryogenic low-speed centrifuges, we tend to follow the five principles: one rule, two comparison rules, substitution rules, exchange rules and reference conditions rules, among which:
Large-scale spray dryers are highly regarded by many companies because of their fast drying speed, good drying effect and continuous production process. However, as the use time increases and the relevant parameters are set incorrectly, the spray dryer will cause some problems in the production process. After more than ten years of experience in the company, we have listed some common problems and solutions:
The crude fiber measuring instrument is also called a fiber measuring instrument and a cellulose measuring instrument. The crude fiber analyzer is an apparatus for digesting a sample according to the currently used acid-base digestion method and performing weight measurement to obtain a crude fiber content of the sample. The crude fiber analyzer uses the acid and alkali with the correct concentration to digest the sample under certain conditions, and the amount of the mineral is deducted after burning at a high temperature, and the content is called crude fiber. It is not an exact chemical entity, but a summary of the ingredients measured under recognized mandatory conditions, with cellulose being predominant, with a small amount of hemicellulose and lignin.
In order to ensure the cleaning of the drying tower body and its piping and all parts in contact with the finished product, it is necessary to obtain a first-class product and regular cleaning equipment. When the product variety is changed, or if the spray drying equipment has been discontinued for more than 24 hours without being cleaned, a thorough and thorough cleaning should be carried out.
The glass reactor is limited to indoor use. The power lead protection grounding of the instrument is connected to the housing and the application part and must be reliably grounded through the power socket. The glass reactor should be equipped with a leakage protector when it is used in a place where it may be wet. When operating the instrument, be careful to keep the operating surface clean and avoid hard objects from hitting the glass instrument to avoid damage to the instrument. Use a neutral cleaning solution to clean the surface of the instrument. Do not use any solvent-based liquids. Maintaining a good working environment and avoiding inadvertent mishandling is an important part of maintaining good performance and prolonging the service life of the glass reactor.
For the separation effect of the centrifuge, we often consider the type of centrifuge, centrifugation method, centrifugal medium and other factors, but in actual operation, in addition to these points, the centrifuge speed and centrifugation time, as well as the pH and temperature of the centrifugal medium, etc. It is also very important.
The centrifugal rotor is the core component of the centrifuge. All systems in the centrifuge are configured to ensure that the rotor operates safely under certain conditions. The rotor not only directly affects the separation effect, it is also the main force component in the centrifuge technology, which is extremely important for the safety of the centrifuge. What are the contents of the service life of several commonly used centrifuge rotors? What are the problems with the service life of several commonly used centrifuge rotors?
How to choose a centrifuge, the ordinary centrifuge only needs to choose according to the size of the workload, from the two aspects of speed and capacity. We should consider the following five aspects from the following aspects:
The quality of the element lamp selected by the atomic absorption spectrometer directly affects the sensitivity of the measurement and the linearity of the standard curve. Some of the lamp backgrounds are too large to be used normally. The lamp emits a trace of hydrogen in the lamp during use, and the light emitted by the hydrogen is a continuous spectrum, which can be called the background emission of the lamp.
Atomic absorption spectrometers are precision special equipment that requires regular commissioning and maintenance. According to the operation regulations and precautions, combined with practical experience, several methods of instrument debugging, instrument maintenance and maintenance during the use of atomic absorption spectrometer are discussed, so that the instrument analysis can achieve the best results at any time.
The low speed centrifuge is a special equipment for rapid separation and precipitation of mixed solutions. It can be widely used in hospitals, food, industry, scientific research and other units for laboratory tests, biochemical tests, separation of suspensions, etc.
In the process of using a medical centrifuge, it is easy to operate normally because the centrifuge rotor is unbalanced, or because of an accident such as a broken shaft caused by an unbalanced state, today, the cause of the imbalance of the rotor of the medical centrifuge is analyzed.
Centrifugal separation technology has also undergone several generations of replacement, from medical centrifuges, low-speed refrigerated centrifuges, high-speed centrifuges to high-speed refrigerated centrifuges, ultra-large capacity refrigerated centrifuges, ultracentrifuges, ultra-speed refrigerated centrifuges, and intelligent high-speed refrigerated centrifuges. We have summarized the common problems in the use of centrifuges and hope to help you in the future.
In the process of using sterilization equipment, users know that they should pay attention to many precautions. After the items are sterilized, many people may feel that they have already handled them, and they are not careful. After the equipment is finished sterilization, it is not known. We also have to pay some attention. Next, we will introduce you to what we need to pay attention to after the autoclave steam sterilizer. Through our introduction, I hope everyone can gain something.
Autoclaves steam sterilizer are common sterilization equipment, generally divided into portable sterilizers and vertical sterilizers, which are heated by heating wire. When heated to a certain temperature, water will become water vapor. The temperature can reach more than 100 degrees. In addition to increasing the temperature, it can also be boosted. At the same time, it can be kept warm and kept pressure. Therefore, it is widely used in biological companies, hospitals and food fields, mainly for disinfecting utensils and clothes.
The use of steam sterilizer is a technical activity. Generally speaking, how to use it in the course of the university, how to maintain it, etc., and in our work, it is a very common equipment, so how to use it is also good to learn how to use it. A technology is absolutely useful. By learning and understanding, it will be easier to work in the future. How to use steam sterilizer? How to maintain it?
Our company summarized the common faults of the operators using the muffle furnace through the return visit. When you encounter the following problems, you should calmly deal with them. Don't be sloppy, otherwise the muffle furnace may not be used.
When using high-temperature box type resistance furnace, we must pay attention to the operation specifications. If we do not pay attention to the operation details for a long time, it may affect the service life of the resistance furnace. Only the standard use can make the various parts of the resistance furnace operate efficiently, neat and durable.
Through regular visits to customers, we have found through statistical analysis that many customers often ignore some small details when using ceramic fiber box furnaces. Although there is no big impact at present, it will always affect the life of equipment. Here are a few of the details of the regular parts:
The muffle furnace is a universal heating device. Usually called box furnace. Muffle furnace is a cycle operation type, which is used for laboratory analysis, industrial and mining enterprises, scientific research units for elemental analysis and determination, and general small steel parts for quenching, annealing, tempering and other heat treatment. High temperature muffle furnace can also be used for sintering of metal and ceramics. , high temperature heating for dissolution, analysis, etc.
Tablet friability test refers to the percentage loss of weight after the tablet rolls 100 times in the cylinder of the specified friability tester. It is used to check the friability of the uncoated tablet and its physical strength, such as pressure. Broken strength, etc.
The friability tester is used to check the friability of non-coated tablets and other physical strengths such as crush strength. Fragility means that the tablet is susceptible to chipping, cracking, cracking, etc. after being subjected to vibration or rubbing. The friability of the tablet reflects the anti-wear and vibration resistance of the tablet and is also an important item for the inspection of the quality standard of the tablet.
In the food industry, spray drying equipment not only allows food to maintain a good appearance and original nutritional value, but also produces coffee mate, egg yolk powder, milk powder, soup, juice powder and other products, but also has large power consumption and excessive volume. It is prone to sticking wall phenomenon and large-time investment. In the case of national environmental protection and people's demand for food, spray drying equipment needs to maintain its position in the food industry.
The freeze dryer is mainly a machine consisting of a refrigeration system combined with a vacuum system and a heating system including an electrical control system. Since it is freeze-dried, there will definitely be a dry box and a refrigeration unit. There are of course some other components. In fact, there are many ways to dry, such as drying, drying or vacuum drying.
The drug dissolution rate refers to the rate and extent to which the drug is dissolved from a solid preparation such as a tablet in a prescribed solvent. It is an indicator for evaluating the quality of oral solid preparations of drugs, and is an in vitro simple test method for simulating disintegration and dissolution of oral solid preparations in the gastrointestinal tract.
A complete rotary evaporator was combined with a rotary evaporator condenser and motor, water bath, distillation flask, collection flask and other accessories. Each part of the rotary steaming plays its own role, and the role of the rotary evaporator condenser tube is a top priority.
Before buying a rotary evaporator, you need to consider four issues.First, what is the amount of distillation of the rotary evaporator? Second, what is the expected distillation solvent? What is the boiling point of the solvent? 4. What is the number of samples that need to be distilled?
Many people do not pay enough attention to some of the equipment's precautions in the process of using the horizontal steam sterilizer. It is considered that there is no need to comply with so many uses. In fact, this is wrong. We are using a horizontal steam sterilizer. In the process of the long-term failure to pay attention to the use of some equipment for a long time, the horizontal steam sterilizer will frequently have some problems. Here are some tips for using the horizontal steam sterilizer:
With the continuous development of China's pharmaceutical industry in recent years, the application of medical centrifuges has become more and more extensive. We can see it in the laboratory and laboratory of the hospital. The main function is to scatter the particles in the solution. Separation and separation of liquids that are incompatible with each other at two different densities.
Medical centrifuges are widely used in medical research or hospital testing. Now more centrifuges are used in hospitals, such as high-speed centrifuges, blood centrifuges, blood card centrifuges, urine sediment centrifuges, capillary centrifuges, and cytocentrifugation. Machines, biopharmaceutical centrifuges, gel bubble processing centrifuges, etc., have a wide variety of functions, and their functions are not the same.
When using a high speed centrifuge, it must be operated from a safety point of view, and it is necessary to proceed from its principle. Here is a detailed introduction to the maintenance of the state of operation of the high speed centrifuge, which can help you to use the high speed centrifuge correctly.
In the process of operating the desktop high-capacity centrifuge, the anti-corrosion problem must first pay attention to, the corrosion of the equipment is easy to cause the equipment to malfunction, or the corroded things enter the inside of the equipment, which has an impact on the experimental results. Here are three ways to prevent corrosion from benchtop large capacity centrifuges:
Centrifugal separation technology has also undergone several generations of replacement, from medical centrifuges, low-speed refrigerated centrifuges, high-speed centrifuges to high-speed refrigerated centrifuges, ultra-large capacity refrigerated centrifuges, ultracentrifuges, ultra-speed refrigerated centrifuges, and intelligent high-speed refrigerated centrifuges.But what problems should you pay attention to when using the centrifuge daily? Please see the following instructions:
Centrifuge is an indispensable instrument in biological experiments. It seems to be a universal instrument, but it has a lot of knowledge. In the experimental operation, we need to understand the knowledge of the centrifuge and use it reasonably to serve our experiment more stably.
The study found that although some marine fish can synthesize polyunsaturated fatty acids such as DHA and EPA, the DHA accumulated in their body is mainly derived from their food. The primary producer of marine food, the marine microbe, is the original producer of polyunsaturated fatty acids.
The glass reactor mainly utilizes the characteristics of its double-layer glass. We can place the reaction materials in the middle interlayer and carry out the stirring reaction under normal pressure or negative pressure. The glass reactor is injected into the thermostat through the double-layer reactor. The hot solution or the cooling liquid is heated or cooled at a constant temperature in the reactor, and stirring can be provided. Thus, the medium in the interlayer of the glass reactor is subjected to a cyclic reaction by stirring to achieve heating or cooling. It is widely used as an ideal equipment in modern biochemical new material synthesis experiments.
As we all know, the pharmaceutical profession is different from the general production profession, and the requirements in all aspects are relatively more stringent. Regarding the production enterprises, the selected production equipment and so on must also satisfy many specifications and requirements. In the process of producing pharmaceuticals, it is often demanding boring, and now the drug is dry and can use a special spray dryer to achieve a good effect.
According to the different methods of cold air discharge, the pressure steam sterilizer is divided into two types: the lower exhaust type pressure steam sterilizer and the pre-vacuum pressure steam sterilizer.
Spray dryer technology has been used in industrial production for a long time, but there are still many problems, which directly affect the quality of the product. Targeted testing and design is an important part of the characteristics of different feedstock fluids. When there is no accurate mathematical model to confirm, the test is still the best way to solve these problems.
Vacuum freeze-drying technology is a high-tech dehydration technology that protects color, keeps freshness and maintains quality. In recent years, the consumption of freeze-dried food in Europe, America and Japan has increased rapidly, and for a long time, China's agricultural and livestock products have been exporting. The raw material or primary processing stage gives a general feeling of low technical content. By developing freeze-dried vegetables and meat, it will improve the grade of China's export food and obtain higher added value.
The design of the freeze-drying machine automatic control system requires simple operation, starting from the material into the button, quick-freezing vacuum sublimation and drying in one go, prompting the shutdown after the freeze-drying is completed. Relevant temperature and pressure control points should be carefully selected and properly controlled. The correlation between quick freezing, vacuum holding and heating should be properly controlled, and the process curve should be set for different materials.
Fully automatic autoclave is widely used in medical and health care, agriculture and scientific research. It is the most ideal equipment for the comprehensive sterilization and sterilization of medical equipment glassware and automatic autoclave.
In the freeze dryer, the pre-cooler is not only the refrigeration recovery device of the refrigeration system, but also the low-temperature air regenerator after dehydration. It is a major component of the freeze dryer and is a characteristic condition that distinguishes the freeze dryer from other refrigeration equipment.
The steam sterilizer is an steam sterilizer device, which belongs to a pressure vessel and is commonly used for sterilization of glassware. The general pressure reaches 0.15 kPa, and the temperature is maintained at about 120 degrees for half an hour. From heating, heat preservation and cooling. It takes two or three hours. Steam sterilizer are very common sterilization equipment. As long as they are used in microorganisms, they are basically used. They are very convenient, safe, efficient, and inexpensive. Therefore, they are widely used. There are some issues to be aware of.
Before using the spray dryer, the staff needs to complete the relevant preparations in advance. First of all, the material to be sprayed is thoroughly emulsified and homogenized by a homogenizer and passed through an 80 mesh screen. This is to avoid the occurrence of atomizers and pipeline blockage in the later stage. And these materials should be placed in stainless steel buckets for use. In addition, a bucket of tap water is used to clean the atomizer and spray chamber of the spray dryer.
The automatic control of the small spray dryer can reduce the labor intensity of the operator, reduce the number of operators, reduce the operating cost, and improve the quality of the drug after baking.
The freeze dryer consists of a refrigeration system, a vacuum system, a heating system, and an electrical instrument control system. The main components are drying ovens, condensers, refrigeration units, vacuum pumps, heating/cooling devices, etc. It works by freezing the dried item below the triple point temperature and then sublimating the solid water (ice) in the item to water vapor under vacuum conditions, removing it from the item and drying the item.
It is well known that when using the freeze dryer for the first time, we must thoroughly clean all parts of the dryer. Everyone knows that stainless steel parts are cleaned with ethanol, and plexiglass is washed with normal saline. Ampoules are cleaned with an ultrasonic cleaner, but what preparations do we need to make before actually operating the freeze dryer?
The freeze-dried food of the freeze dryer machine has gradually entered our daily life because of its good preservation, good nutrition, easy to carry and easy storage. So, which foods can be lyophilized?
Freeze drying of a vacuum freeze dryer refers to the process of removing moisture or other solvent from a frozen biological product by sublimation. Sublimation refers to the process of solvents, such as water, like dry ice, which does not pass through a liquid state and changes from a solid to a gaseous state.
The rotary evaporator is an experimental equipment for rectification and purification in the laboratory. It is heated by constant temperature and rotated under reduced pressure (negative pressure) to form a film to continuously evaporate a large amount of volatile solvent, evaporate efficiently, and then condense and recover the solvent. The effect of purifying the separation, that is, under reduced pressure, the distillation flask is continuously rotated as the solvent is distilled.
Rotary evaporators are primarily used to continuously distill large amounts of volatile solvents under reduced pressure. In particular, the concentration of the extract and the distillation of the receiving liquid in the chromatographic separation can separate and purify the reaction product.
The rotary evaporator is an evaporation instrument widely used in laboratories. Suitable for reflow operation, rapid evaporation of a large amount of solvent, concentration of trace components and reaction process requiring agitation. Zhengzhou Laboao Instruement Equipment CO., LTD. specially arranged the rotary evaporator operation steps, hoping to help everyone.
The reaction medium can be stirred in the inner layer of the glass reactor, and the interlayer can be circulated through a cold heat source (refrigerant, water, heat transfer oil) to achieve constant temperature heating or cooling reaction, and the distillation and reflux of the reaction medium can be controlled. The glass reactor is an ideal test and production equipment for the preparation of modern synthetic chemicals, biopharmaceuticals and new materials.
Single-layer glass reactors are used in the field of ideal testing and production equipment for modern synthetic chemicals and biopharmaceuticals and their new materials. Therefore, learning more knowledge and skills as a high-tech product can help to play the role of the reactor. Serve us more industry needs, how to do it?
The jacketed glass reactor is designed as jacketed glass, and the inner layer is placed in the reaction medium for stirring reaction, and the interlayer can be heated or cooled by using different cold and heat sources (refrigerant, hot water or hot oil). Under constant temperature conditions.