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.
Technical Knowledge 2014-05-12 05:47:22
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?
Technical Knowledge 2014-08-31 11:52:42
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.
Technical Knowledge 2014-09-07 03:55:29
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.
Technical Knowledge 2014-09-13 06:05:23
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.
Technical Knowledge 2014-09-26 10:11:28
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.
Technical Knowledge 2014-10-28 03:59:26
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.
Technical Knowledge 2015-02-17 07:22:00
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?
Technical Knowledge 2015-04-13 04:33:47
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?
Technical Knowledge 2015-06-10 04:54:05
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.
Technical Knowledge 2015-07-07 05:47:42
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.
Technical Knowledge 2015-07-28 06:55:51
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.
Technical Knowledge 2015-09-01 13:10:48
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.
Technical Knowledge 2015-09-21 11:35:54
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.
Technical Knowledge 2015-12-26 16:54:21
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.
Technical Knowledge 2016-03-24 18:04:30
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.
Technical Knowledge 2016-04-25 13:52:51
In recent years, spray dryers have been widely used in the daily production process. Because of their more uses and greater role, they have received more attention.
Technical Knowledge 2016-04-28 05:51:36
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.
Technical Knowledge 2016-05-04 06:45:45
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.
Technical Knowledge 2016-05-10 17:12:13
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.
Technical Knowledge 2016-06-03 17:23:24
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.
Technical Knowledge 2016-06-08 09:50:54
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.
Technical Knowledge 2016-07-17 06:23:35
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.
Technical Knowledge 2016-07-08 05:04:25
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.
Technical Knowledge 2016-08-23 12:41:05
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:
Technical Knowledge 2016-10-20 12:40:01
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:
Technical Knowledge 2016-10-22 05:04:30
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.
Technical Knowledge 2016-11-05 06:52:16
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.
Technical Knowledge 2016-12-06 10:01:12
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.
Technical Knowledge 2016-12-16 10:08:28
Low speed centrifuges can be widely used in clinical medicine, biochemistry, immunology, blood stations, etc., and are routine instruments used in the laboratory for centrifugal sedimentation.
Technical Knowledge 2017-01-07 08:50:50
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:
Technical Knowledge 2017-02-10 16:54:02
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?
Technical Knowledge 2017-03-12 15:18:38
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.
Technical Knowledge 2017-04-21 12:24:51
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.
Technical Knowledge 2017-06-14 07:08:09
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.
Technical Knowledge 2017-07-10 12:25:15
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.
Technical Knowledge 2017-07-22 12:29:33
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.
Technical Knowledge 2017-08-16 10:38:42
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.
Technical Knowledge 2017-09-14 10:44:33
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.
Technical Knowledge 2017-09-19 07:05:09
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:
Technical Knowledge 2017-10-12 10:32:07
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.
Technical Knowledge 2017-11-20 09:06:53
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.
Technical Knowledge 2017-12-21 09:16:07
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?
Technical Knowledge 2018-02-06 14:49:41
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.
Technical Knowledge 2018-02-11 14:49:15
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.
Technical Knowledge 2018-03-22 13:48:42
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.
Technical Knowledge 2018-04-29 14:01:00
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.
Technical Knowledge 2018-06-01 05:17:58
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.
Technical Knowledge 2018-06-13 05:38:06
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.
Technical Knowledge 2018-08-26 13:28:20
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.
Technical Knowledge 2018-12-12 16:31:12
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:
Technical Knowledge 2019-01-31 08:46:08
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?
Technical Knowledge 2019-01-31 08:55:01
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.
Technical Knowledge 2019-01-31 09:00:58
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.
Technical Knowledge 2019-02-16 14:53:35
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.
Technical Knowledge 2019-02-17 15:19:42
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.
Technical Knowledge 2019-02-20 09:05:11
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:
Technical Knowledge 2019-02-22 10:06:14
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:
Technical Knowledge 2019-02-24 16:15:20
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.
Technical Knowledge 2019-02-27 10:52:18
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:
Technical Knowledge 2019-02-28 15:19:24
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.
Technical Knowledge 2019-03-23 13:20:52
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.
Technical Knowledge 2019-03-24 11:56:43
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.
Technical Knowledge 2019-03-27 05:08:48
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.
Technical Knowledge 2019-03-28 06:45:31
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?
Technical Knowledge 2019-03-28 07:09:13
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.
Technical Knowledge 2019-03-31 11:48:32
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.
Technical Knowledge 2019-04-04 11:49:52
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.
Technical Knowledge 2019-04-06 05:54:16
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.
Technical Knowledge 2019-04-17 07:06:08
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:
Technical Knowledge 2019-04-18 06:09:52
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:
Technical Knowledge 2019-05-08 07:47:48
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.
Technical Knowledge 2019-05-08 10:36:26
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.
Technical Knowledge 2019-05-09 06:58:31
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.
Technical Knowledge 2019-05-11 07:54:45
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.
Technical Knowledge 2019-05-12 07:25:42
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.
Technical Knowledge 2019-06-19 04:49:51
What are the advantages of an explosion proof jacketed glass reactor compared to a conventional reactor?
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.
Technical Knowledge 2019-06-20 23:35:25
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.
Technical Knowledge 2019-06-28 02:11:23
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.
Technical Knowledge 2019-07-05 17:46:09
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.
Technical Knowledge 2019-08-17 00:07:20
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?
Technical Knowledge 2019-08-17 00:18:14
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.
Technical Knowledge 2019-08-17 22:06:56
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.
Technical Knowledge 2019-08-22 10:52:49
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.
Technical Knowledge 2019-08-27 11:42:50
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:
Technical Knowledge 2019-09-01 11:05:06
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.
Technical Knowledge 2019-09-11 09:19:35
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:
Technical Knowledge 2019-09-21 05:30:04
The dissolution tester is used to check the speed and extent of dissolution of a drug from a solid preparation such as a tablet or a capsule in a prescribed solvent.
Technical Knowledge 2019-11-21 09:25:59
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:
Technical Knowledge 2019-11-21 09:26:22
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.
Technical Knowledge 2019-11-21 09:27:09
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.
Technical Knowledge 2019-11-21 09:27:35
Key parameters and important characteristics of fluorescence quantitative PCR instrument When purchasing a fluorescence quantitative PCR instrument, several key parameters should be noted:
Technical Knowledge 2020-07-14 15:28:39
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:
Technical Knowledge 2020-07-14 15:47:42
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.
Technical Knowledge 2020-07-15 15:42:31
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?
Technical Knowledge 2020-07-16 15:57:19
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.
Technical Knowledge 2020-07-20 15:04:38
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.
Technical Knowledge 2020-09-29 10:28:31