China Wuhan Desheng Biochemical Technology Co., Ltd Company News

Name: n-ethyl-n - (2-hydroxy-3-sulfopropyl) - 3,5-dimethoxyaniline sodium salt,DAOS reagent CAS No.: 83777-30-4 Molecular formula: c13h20nnao6s Molecular weight: 341.36 Purity: 99% Moisture: ≤ 0.5% Less than 15 ppm Ignition residue: ≤ 0.1 Description white or light blue powder. Oxidizing chromogen reagent Store and transport at 2-8 ° C, sealed and protected from light   Daos white crystal powder   We usually keep the temperature of Daos at 0-5 ℃. However, in the process of use, we usually re seal the Daos which has not been used up, or replace the packaging bottle with a new one for sealing treatment. Otherwise, once the product absorbs moisture, it will lead to caking or beige color.   Our company packaged and wrapped DAOS in transportation process, wrapped it with pearl foam mattress, and then added 2-3 packages of ice to avoid high temperature during transportation and affect the characteristics of the product.   Daos is one of  the new Trinder's reagents. It is a highly water-soluble aniline derivative, which is widely used in diagnosis and biochemical tests. In the colorimetric determination of hydrogen peroxide activity, it has some advantages over the conventional chromogenic reagent   Our company strives to do a good job in the process of R & D, production, sales and transportation, and also in order to let customers feel at ease about our products, we Desheng technology to achieve: Based on sincerity, taking morality as the first, quality first, leading technology to serve the majority of consumers.

At present, the novel coronavirus control and prevention form is still very severe. As the first step in nucleic acid detection, the importance of sample collection and preservation is beyond doubt. The inspection industry often says "garbage in, garbage out (garbage specimen results)", the most important factor is sampling. If there is a problem with the sample collection, then the following work is done well, and the results are invalid. Choosing the right virus preservation solution and collection tube can make the new crown detection get twice the result with half the effort! At present, almost all virus preservation solutions on the market directly preserve live viruses, leading to a high risk of infection for medical staff in sampling, transportation and testing. In view of this situation, the first line of anti epidemic disease needs the sample preservation solution which can directly inactivate the virus. However, it should be noted that when inactivating the virus, we should also consider whether the preservation solution can stably preserve the integrity of virus nucleic acid To avoid the degradation of nucleic acid in the sample before detection, resulting in "false negative" of nucleic acid detection. Desheng contains no guanidine salt virus preservation solution to minimize the risk of "false negative".   We compared the effects of preservation solution containing guanidine hydrochloride, guanidine isothiocyanate and guanidine salt free preservatives at 37 ℃. The results showed that the main component was guanidine salt, the preservation effect was not ideal!   Under the same conditions of 37 ℃, the preservation efficiency of viral nucleic acid is basically 100% after 1-7 days of storage; however, the preservation efficiency of viral nucleic acid gradually decreases with the use of other two guanidine salt preservation solutions, and it is lower than 20% by the seventh day, indicating that RNA is undergoing severe degradation over time! Guanidine salt (guanidine isothiocyanate or guanidine hydrochloride, etc.) is a classical protein denaturant, which is often used for cell lysis in nucleic acid extraction, and can also achieve the effect of virus inactivation. However, guanidine salt does not have the ability to preserve viral nucleic acid at room temperature, which is easy to cause sample degradation. Therefore, it is not suitable for the preservation of new coronavirus samples. Therefore, it is strongly recommended that you choose non guanidine salt Components of the virus preservation solution.   Here, we appeal to the majority of medical workers to pay attention to the following aspects when selecting virus preservation solution if your sampling purpose is nucleic acid detection and you do not need to cultivate live virus:   1. The virus preservation solution can be used to inactivate the virus At present, nucleic acid detection is to detect the viral RNA in the sample, which needs to split the virus. Therefore, as long as the integrity and stability of the viral nucleic acid can be ensured, there is no need to preserve the live virus. Therefore, in the current situation of fighting against the new coronavirus epidemic situation, it is more ideal to inactivate the virus while collecting samples.   Some manufacturers have introduced inactivated preservation solution on the market, but the inactivated component is guanidine salt. The results of comparative experiments show that guanidine salt preservation solution does not have the ability to preserve virus nucleic acid at room temperature, which is easy to cause sample degradation and is not suitable for the preservation of new coronavirus samples. Therefore, we recommend virus preservation solution containing non guanidine salt protein denaturant It can inactivate the virus and ensure that the virus nucleic acid does not degrade at room temperature.   2. The volume of preservation solution in the sampling tube should be appropriate It is very important to select the appropriate volume of preservation solution: ① if each sample is sampled separately, it is recommended that you select a virus sampling tube with 1ml preservation solution. The sampling volume can not only meet the requirements of nucleic acid extraction and detection in the downstream, but also the virus concentration is three times higher than that of 3ml preservation solution! ② In case of large-scale preliminary screening and mixed detection, the swab samples of 3-5 people are placed in the same sampling tube. It is recommended that you select a virus sampling tube with 3ml preservation solution, so that the sample size can meet the demand of downstream nucleic acid extraction, improve the detection efficiency and reduce the detection cost.   3. Virus preservation solution that can be used to transport and store samples at room temperature Because of the instability of RNA, the traditional virus sampling tube needs to be transported to the laboratory within 48 hours under the condition of 4 ℃. If the transportation temperature is not up to the standard, it may cause the degradation of virus nucleic acid and lead to the "false negative" test result! In contrast, if kangweishiji can transport and keep the virus nucleic acid stably at room temperature, the problem of sample transportation can be solved, and the accuracy of detection results can be improved.   4. The virus preservation solution that can protect the sample from high temperature inactivation is used According to the relevant guidelines of the National Health Commission, the samples should be inactivated at high temperature (above 56 ℃ for 30min) before extracting viral nucleic acid. However, Beijing Center for Disease Control and prevention, Beijing Research Center for preventive medicine and other institutions are in clinical The paper published by chemistry showed that high temperature inactivation could lead to the degradation of viral nucleic acid, thus reducing the detection rate of viral nucleic acid, which was one of the reasons for the high false negative rate of nucleic acid detection of new coronavirus.   The results showed that high temperature inactivation had no significant effect on the integrity of coronavirus nucleic acid.   The virus preservation solution developed and produced by Desheng can be divided into inactivated and non inactivated types. Different preservation solutions are selected according to different experimental requirements and detection conditions. If you have any questions or needs, please call us for details. Choosing Desheng virus preservation solution is your right choice.

Heparin lithium is a chemical with a white to nearly white appearance. There was no significant difference in TP, Aso, UA, alt, Mg, Cl, TC and CRP between heparin lithium anticoagulant plasma and serum (P > 0.05). There were significant differences in HBD, LDH and TBA between heparin lithium anticoagulant plasma and serum (P < 0.05). Therefore, except for HBD, LDH and TBA, the correlation between heparin lithium anticoagulant plasma and serum is good. Therefore, it is feasible to use heparin lithium anticoagulant plasma instead of serum in life detection, which can be used as an important detection method.   Basic information of Desheng product heparin lithium Name: heparin lithium CAS No.: 9045-22-1 Purity: ≥ 150 USP units / mg Specification: 10g / bottle, 50g / bottle Storage and transportation: 2-8 ° C   [scope of application]   1. This product is suitable for the collection and anticoagulation of blood samples for clinical biochemical examination and emergency biochemical examination, as well as for blood sample collection and anticoagulation of some Hemorheology items. 2. It is recommended to use heparin lithium as anticoagulant when determining the ion content in blood, because it is the least likely to interfere with the determination of other ions. 3. This product is not a drug and cannot be used as an injection. It is forbidden to inject directly into human body and animal body.   [precautions]   In order to ensure sufficient blood anticoagulation, heparin salt test tube blood collection must be reversed and mixed 5-8 times as soon as possible. Especially when the ambient temperature of blood sampling is higher than 25 ℃, the mixing of blood and heparin lithium must be timely and sufficient, otherwise it is easy to cause blood coagulation or local coagulation.   Heparin anticoagulation is not irreversible anticoagulant, so the test should be completed within 6 hours after blood collection of heparin lithium anticoagulant test tube, otherwise, the test results may have errors.   Heparin may be involved in the metabolism of cell enzymes and ions, so the amount of heparin used may affect the detection results. The dosage of heparin should ensure full and local anticoagulation, so as to ensure that most of the plasma indexes can be repeated within 6 hours, especially ast, alt, TBIL, DBIL, GGT and other sensitive indicators.   Heparin lithium can be used with separation gel at the same time, anticoagulant effect, tube wall silicification, centrifugal conditions, separation gel quality and so on will affect the blood separation effect. It is suggested that high quality plasma samples can be obtained by using the blood separation gel produced by our company. It is suggested to use gamma ray irradiation with a dose of 8-25kgy. The irradiation dose can be determined by the initial colony number.   [warning and prevention]   It is forbidden to use heparin lithium in case of impurities, abnormal smell, color and expiration date. Do not use the heparin solution when it is contaminated with lithium bacteria. This product is a biological preparation, safe, non-toxic and harmless.   Desheng is an old brand blood testing reagent company with 14 years of R & D and production experience, and has a deep research on blood collection additives. If you need heparin lithium enterprise friends can contact directly, looking forward to your consultation!

Affected by this year's epidemic, Carbomer has become a popular raw material for daily chemical products. Now there are countless manufacturers that provide Carbomer. It can be said that buyers are confused. What kind of Carbomer raw material company is more worthy of choice. Desun’s decades of professional R&D and production experience have accumulated a lot of experience for the company. Its advantages and marketing strategies have laid a solid foundation for itself in the industry. This type of company is worthy of long-term cooperation. In addition, it also needs to have The following three characteristics.     1. Have an exclusive R&D department to master advanced technology   By investigating related companies, we can find that high-quality carbomer manufacturers can master more advanced technologies, conduct in-depth explorations with customers, and negotiate cooperation-related matters. In early 2020, the company invested a lot of capital, manpower and material resources, and now has A group of professional technical backbone personnel, through their R&D personnel working overtime and testing and testing, finally completed the final product of Carbomer. The carbomer raw materials produced are up to standard in all indexes, comparable to international brands, and its transparency is better than that of well-known brands.   2. Short delivery cycle, saving purchase time   With the increasing demand for carbomer, carbomer was in short supply for a while. Fortunately, after the increase in manufacturers, this phenomenon gradually improved. However, there are still many customers who fail to supply ton goods in time. Sheng currently has a professional production base and adopts imported production equipment. The daily output of Carbomer can reach 3-5 tons, which can meet the needs of customers in large quantities. Customers do not have to worry about the delivery cycle.     3. Ability to uphold the principle of seeking truth from facts to solve customers' doubts   Good carbomer manufacturers can usually implement the principle of seeking truth from facts. Whether it is introducing customers to other products of the company or answering questions raised by customers, they will not divorce from reality. Because the company knows that products and rhetoric that are inconsistent with the facts will cause wrong guidance to customers. "Morality-oriented, honesty first" is the foundation for the company to stand firm for more than ten years. Similarly, when encountering quality When there is a problem, Desheng never shirks, but promptly returns and exchanges to ensure that the interests of customers are not harmed to the greatest extent.   Carbomer manufacturers that are worthy of cooperation generally have the three characteristics mentioned above. This part of the content can be used as a summary of the advantages of Desheng, and it can also be a reference for customers to consider during the purchase period. There are a large number of manufacturers of the same type on the market. We hope that customers in need can calmly complete the screening without missing any details. Desun now produces Carbomer 940 and Carbomer 980. Welcome to buy!

The English name of edta-3k is Tripotassium hydrogen ethylenediamineetraacetate. Its CAS number is 17572-97-3. Its molecular formula is c10h13k3n2o8, and its molecular weight is 406.51372. Its appearance is white crystalline powder. Structure of Tripotassium EDTA   Application of tri potassium ethylenediamine tetraacetic acid 1. As an anticoagulant for blood cell analysis. Ethylenediamine tetraacetic acid (EDTA) as an anticoagulant for blood cell analysis was determined by the International Committee on blood standards (ICSH) in 1993 and has been widely used. In China, the use of edta-k3 anticoagulant for blood analysis is not long, and there are few reports on EDTA dependent thrombocytopenia. Some people think that this phenomenon is an autoimmune disease, because a large proportion of such people have elevated serum immunoglobulin, and have positive anti platelet autoantibodies and anticardiolipin antibodies.   The plasma of such patients can cause platelet aggregation of healthy people when they are incubated with platelets of healthy people, but the plasma of healthy people can not cause platelet aggregation of such patients. When edta-k3 anticoagulant is used in patients with edta-k3 anticoagulant, a large number of PLT gather together, leading to false reduction of PLT count. At the same time, the volume of some PLT aggregates is equivalent to the volume of WBC, and can not be destroyed by hemolysin, which also makes the false increase of WBC count, which will make the classification of WBC appear various inaccurate prompts There must be platelet aggregation or platelet aggregation in the histogram.   Some studies have shown that when edta-k3 anticoagulant is used for blood analysis, it is found that the platelet count is too low for unknown reasons. Therefore, the patient should be manually checked for blood smear and PLT manual counting, or the PLT count should be rechecked by instrument after dilution with non anticoagulant peripheral blood, so as to correctly understand the real level of PLT in patients. In particular, tumor patients, autoimmune diseases, pulmonary heart disease, pregnant women, advanced liver disease and other patients.   2. Preparation of a self-cleaning high borosilicate glass rod. The preparation method comprises the following steps: 1) according to the weight parts, 34-44 parts of aluminum isopropoxide, 1-2 parts of ethylene diamine tetraacetic acid Tripotassium salt and 250-300 parts of deionized water are evenly mixed, the mixture is heated to 40-45 ℃, and the heat preservation treatment is conducted for 2-3 hours to prepare colloidal solution a;   2) According to the weight part, 29-33 parts of tetrabutyl titanate is dissolved in 150-170 parts of ethanol, and then 60-70 parts of ammonia water with mass fraction of 11-15% are slowly dropped into it. After standing for 2-3 hours, 5-9 parts of potassium titanium oxyphosphate are added into the mixture, and after mixing and stirring evenly, colloidal solution B is prepared;   3) Colloidal solution a and colloidal solution B are mixed according to the mass ratio of 3-6:1, and then colloidal solution B is added into the mixture The self-cleaning coating is prepared by mixing and stirring the polyethanolamine with the amount of 1-3%. After cleaning the surface of the high borosilicate glass rod, it is placed in the self-cleaning coating for 10-14 min. after that, it is taken out and put into the high-temperature furnace for sintering treatment to prepare the finished product. In step 1), the addition of potassium EDTA can effectively improve the adhesion performance of the prepared colloidal solution a, improve the dispersion uniformity of AlOOH colloid, and prevent the phenomenon of precipitation;   3. Prepare a kind of thermal insulation coating for building exterior wall. In terms of weight, it contains 80~120 pieces of pure acrylic emulsion, 20~30 parts of Ta2O5-ZnO-SnO2 composite oxide powder, 5~10 parts of three potassium of ethylenediamine acetic acid, 2~5 parts of kaolin, 1~5 parts of borax, 2~5 parts of antifreeze, 5~10 parts of film forming aid, 1.5 1.5 2.3 parts of pyrophosphate, 1~2 1~2 of thickening agent, polyoxyethylene polyoxypropylene pentaerythritol ether and 5~10 nitrobenzene sulfonic acid. To 150.   Through the test, it is found that the introduction of EDTA into the exterior wall coating can significantly improve the acid corrosion resistance of the coating, so that in cities with severe acid rain, the coating can also ensure good service life and is not easy to corrosion and fall off.   Hubei xindesheng material science and Technology Co., Ltd. is specialized in the production and supply of ethylenediamine tetraacetic acid potassium national package, interested parties can contact

In fact, the sensitivity of luminol reagent itself is very high, even if the blood has been scrubbed, or even old blood stains, it can make luminol reagent glow. However, due to the principle that luminol is oxidized and glows, it is more likely to be affected by other non blood substances, such as bleach. In addition, trace blood in the excreta will also be detected by it, which will cause interference.   Some criminal investigation enthusiasts have found that the detection of blood with luminol reagent can be interfered with basically, such as scattering animal blood or liver, feces, iron ion reagent, etc., but it can't escape completely. Even if it can disappear in a short time, it will be exposed in a long time. And even if lucky enough to escape luminol, there are other ways and DNA extraction. Therefore, like the queen, to escape the police search by cleaning the floor, we can not deny the sensitivity of luminol reagent, but only minimize the emergence of evidence.   Because luminol luminescence is caused by oxidation, this means that there are many oxides and catalytic metals that can also make luminol glow, including the daily use of hypochlorite bleach.   If the suspect takes some measures after committing a crime, for example, if he uses chloric acid bleach to clean the scene, then if he is injected with luminol at the scene of the chlorite washed, you will find that it will shine everywhere, which will interfere with the detection of blood. You can't help but sigh that the reagent is wrong.   Luminol is not as bad as you think. Forensic criminal investigation using it to solve a case must have thought of this earlier than you. You should know that although luminol and hypochlorous acid can make luminol glow, the two kinds of luminous phenomena are not the same. The luminescence caused by bleaching agent is fast flashing, while that caused by blood stains is gradually emerging. Experienced detectives or police officers can usually tell the difference between the two, so it's impossible to beat them with such a small trick.   Luminol, a chemiluminescent reagent developed by Desheng, has many advantages, such as high quantum yield, easy synthesis, good water solubility and so on. If you are also a criminal investigation enthusiast, you can contact our website customer service for consultation and purchase if you want to guide and perform a chemiluminescence experiment.

Among the pathogens (virus, bacteria, fungi, parasites, etc.) that cause the epidemic of human infectious diseases, virus is the most common one. Its most important feature is noncellular structure. The viral body is mainly composed of nucleic acid and protein. It contains only one nucleic acid. There is no enzyme system that can produce energy. It can only replicate in living cells. The virus is small and can be used for The unit of measurement is nanometer (nm), the maximum diameter is 300 nm (such as poxvirus), and the minimum diameter is 20 nm (such as foot-and-mouth disease virus). This characteristic of the virus makes it unable to survive without cells, and to study these viruses, we need to rely on the virus preservation solution to prolong the survival time of the virus.     At present, the virus preservation solution can be divided into inactivated type and non inactivated type The left is non inactivated preservation solution, and the right is inactivated preservation solution   1. Inactivated novel coronavirus: it is a colorless transparent liquid, and is suitable for various kinds of viruses, including new coronavirus, influenza virus, hand foot mouth virus, rubella virus and so on. It uses high concentration guanidine salt to quickly inactivate and preserve the virus, so as to make the sample lose infectivity. The novel coronavirus RNA Extraction Kit novel coronavirus, M32/M96 nucleic acid extraction kit, and the new coronavirus PCR kit were successfully applied to detect the inactivated samples. The specificity of the assay was not affected. Applicable kit methods: fluorescent PCR, combined probe anchoring polymerization sequencing, isothermal amplification chip method, magnetic particle chemiluminescence method, colloidal gold method.   2. Non inactivated virus preservation solution: Hanks solution base, gentamicin, fungal antibiotic, BSA (V), and the other two were used as the main components, Cryoprotectants, biological buffers and amino acids, combined with a variety of antibiotics, have antibacterial and antifungal effects; bovine serum albumin (BSA), as a protein stabilizer, can form a protective membrane on the protein shell of the virus, making it not easy to decompose and ensure the integrity of the virus; the neutral environment constructed by Hanks buffer helps to increase the survival time of the virus and Infection stability.  

Since the spread of the new crown virus, the importance of hand disinfection has been greatly improved compared with that before. Carbomer, as an important component of the hand sanitizer gel, is naturally favored by the market. Now there are more and more manufacturers of carbomer in China. Large families are aiming at this bonus market and are prepared to make a big effort to make up for all kinds of enterprises during the epidemic. The loss situation, with so many kapham manufacturers rushing to come, buyers are puzzled. How can we find reliable manufacturers?     Here we need to tell you the purchase of Desheng carbomer products need to pay attention to a few points, you can refer to, avoid detours.   1. Understand the different models of carbomer   There are many types of Carbomer, such as carbomer 980, Carbomer 940, Carbomer 934, Carbomer 941 and so on. Some of the differences between models are big and some are small. Therefore, we need to judge what we need according to our own needs. Different Desheng carbomer models have different uses, which are mainly divided into the following aspects: daily chemicals, food, pharmaceutical accessories, etc. It will save a lot of time if the buyer has a clear awareness of the needs and knows what products Desheng capom is used for.     2. Know the manufacturer of carbomer   First of all, ask at least three suppliers for prices and compare them. In a word: a 5% reduction in purchasing cost is equivalent to a 20% increase in profit. Then, it is also important to pay attention to the reliability of the supplier's product quality while looking at the price!   Next is the delivery date. See if the supplier's delivery date is within your acceptance range. If you can get the supplier to give you a certain safety stock, that would be better!   Finally, service, whether the communication with suppliers is smooth. What kind of service the supplier promises to provide. If you only sell products without services, I believe you will not buy them again. You need to conduct a comprehensive evaluation and analysis of suppliers, including their strengths, weaknesses, problems, threats, etc. Thus, the company's strategy is organically combined with the internal resources and external environment of the company.   ①. The accuracy of the product content and various parameters is guaranteed, and the parameter table is provided, which can be compared and verified by customers. ②. Ensure the continuous spot supply within the customer's demand, which will not affect the normal use of customers. ③. If there are no special circumstances, the freight of all products will be borne by our company. ④. Except for special models, all products of the company have intellectual property certificate, so customers can use them at ease.

Carbomer 940 is a kind of highly hydrophilic anionic polymer. It is a white loose powder with strong hygroscopicity. It can rapidly swell in water, but it does not dissolve. The pH value of 1% aqueous dispersion is about 2.5 ~ 3.5, and its viscosity is low. When neutralized by alkali, the viscosity gradually increases with the gradual dissolution of macromolecules, forming a clear solution at low concentration, forming a semitransparent gel at a relatively large concentration. PH 6.5 ~ 7 has the greatest viscosity and consistency. When the dispersing solution of polymer glue is neutralized with alkali, a transparent and stable gel is formed.   From the above, we know that deshengcarbomer dissolution is not to say that water can be added, so how can we quickly and completely dissolve when using it?   Pre soaking method: A: 24 hours in advance, Desheng carbomer was dissolved in deionized water according to the actual production requirements. After the carbomer was allowed to absorb water naturally, no white powder could be seen on the surface and no white agglomerates could be seen in the solution, then the neutralizer (Carbopol: neutralizing agent = 1:1,2:1) was added, Kappa: 5% neutralizer solution = 1.4.5) adjust the pH value to about 7 to achieve thickening state. Use round tool or disperser and stir evenly at low speed.   B: homogenizer: in the uniform machine according to the actual production ratio, it is homogeneous, no white cluster can be seen, neutralizer is added, gel is formed, and then the vacuum emulsification pot is used to remove the air from the gel.   C: If the solution is dissolved by common methods, Desheng carbomer can not be stirred when added into water. If it is stirred while adding, it will make carbomer form a white water ball. The surface has absorbed water, but there is no water in it. After neutralization, many white spots of water can be seen, and a large number of bubbles are formed. The viscosity of carbomer is high, and the bubbles are difficult to eliminate by themselves. Even if the defoamer is added, it is difficult to eliminate the bubble. In this case, the bubble can only be eliminated by vacuumizing pot.

Serum separation gel is a kind of viscous fluid, which contains a large number of hydrogen bonds. Due to the association of hydrogen bonds, a network structure is formed. Under the action of centrifugal force, the network structure is destroyed and becomes a low viscosity fluid. When the centrifugal force disappears, the network structure is formed again and the fluid with high viscosity is restored. This property is called thixotropy. A kind of serum separation gel can be made by using this property. When the gel and the coagulated blood are centrifuged in the same tube, the gel forms a gel like isolation layer between the serum and the blood clot to separate the serum from the blood clot. Therefore, it can improve the recovery rate of serum and keep the serum in the original state, simplify the clinical test process and improve the work efficiency.       Nowadays, medical laboratory technology has entered a new era of full automation and microcomputer management. In the field of clinical laboratory, no matter in clinical chemistry, serology, immunology and other detection, most of the samples used need to separate serum. How to separate serum quickly and sufficiently and simplify the operation is an urgent problem for medical laboratory. The application of Desheng serum separation gel is expected to solve this problem.   The main use of serum separation gel is that it can form an isolation layer between the cell components of blood and serum, effectively prevent the material exchange between blood cells and serum, ensure the stability of serum components in a certain period of time, and make the detection results closer to the biochemical level. The blood coagulation time of blood can be shortened by adding Desheng coagulant separation gel, and the serum can be quickly obtained and processed After centrifugation, the separation layer can adhere to the test tube tightly. The serum can be directly absorbed by the automatic analyzer in the original state, or stored in cold storage. The long-distance transportation does not affect the detection results, but also avoids the influence of fibrin and hemolysis.   In addition, a series of processes including blood sample injection, serum separation, direct serum sampling by analyzer, blood sample preservation and waste disposal are all carried out in the same branch pipe, which can avoid the pollution of blood samples, prevent the virus infection in the blood, and ensure the biological safety of the inspection process.   At present, there are three types of separation adhesive: transparent, translucent and opaque. The conventional packaging includes 20kg / barrel and 25kg / barrel, plastic bucket and iron bucket.

Buffer solution is a kind of solution which can resist the influence of a small amount of strong acid and alkali outside, and maintain the pH value of the system basically unchanged. It is of great significance in the research of biochemistry. We often use Tris, bicine, caps and so on, but often can't accurately understand the difference between them, for this kind of problem, you can take a look here. Packaging of Desheng buffer   Tris (trimethylolmethylaminomethane) is widely used in the preparation of buffer solution in biochemistry and molecular biology experiments. In biochemical experiments, both TAE and tbe buffers (for nucleic acid dissolution) need to use Desheng Tris. Because it contains amino groups, it can react with aldehydes. Its structural formula, pH value changes greatly with temperature. Generally, the pH value decreases by 0.03 for every degree of increase in temperature. The buffer characteristic of Tris is weak base, and its PKA is 8.1 at room temperature (25 ℃). According to the buffer theory, the effective buffer range of Tris buffer is between pH 7.0 and 9.2.   Bicine (n, n-dihydroxyethylglycine) is an important raw material of antibody detection reagent and nucleic acid detection reagent in the field of in vitro diagnosis. It is a kind of white crystalline powder. It is soluble in water, insoluble in acetone, DMF, DMSO, DMAC and other organic solvents. The pH buffer range is 7.6-9.0, and the pKa value is 8.3 at 25 ℃. It is also a widely used buffer. It is used in enzyme reaction buffer and electrophoresis buffer with working concentration of 3-100ml.   Caps (3-cyclohexylaminopropanesulfonic acid) is mainly used in biochemical diagnosis kit, DNA / RNA extraction kit and PCR diagnostic kit. It is used as buffer for enzyme chemistry and HPLC separation of alkaline drugs. 3-cyclohexylaminopropanesulfonic acid (CAPS) can also support alkaline phosphatase activity and inhibit the growth of Aeromonas at pH 10.5, and can be dissolved in deionized water. After pH is adjusted to 11.0, caps can be used for the purification of fibronectin. Caps is also an important hydrophilic modifier, which can react with polyisocyanate under very mild reaction conditions and in the presence of suitable neutralizing amines, so as to prepare polyisocyanate products which can be emulsified into fine dispersion form in water and stored stably.   When a small amount of strong acid or alkali is added into the buffer solution, the pH value of the solution changes little, but if the amount of acid and alkali is large, the buffer solution will lose its buffering effect. This shows that its buffering capacity is limited. The buffering capacity of buffer solution is related to the concentration of components. After 19 years of independent R & D and production, Desheng technology has been widely recognized and used by customers in China's local market. Over the years, many well-known domestic manufacturers have been choosing and using Desheng products. We can also customize the buffer with different pH value according to the customer's requirements.

Generally speaking, the manufacturers of capom have their own professional technical team, but many of them do not have these. Carbomer is suitable for gel and cream because of its short rheological property, high viscosity, high clarity, low ion resistance and shear resistance.   Kapo, also known as carbomer , is a very important rheology regulator. After neutralization, Carbomer is a gel matrix with thickening, suspension and other important uses. The process is simple, and its stability is good. It is widely used in emulsion, cream and gel. Kappa resin can be used as excellent suspending agent, stabilizer, emulsifier, transparent matrix of cosmetics and pharmaceutical excipient matrix.   At present, Desheng mainly sells two models of carbomer 940 and carbomer 980. Its business covers more than 30 countries. Most of its major customers come from Europe, America and other countries around the world. We can provide high-quality products and services. Compared with other manufacturers, our cost performance ratio is higher. With the public efforts of all the staff of the company, the sales volume of our card ohm continues to rise, and our products have also gained customers' support Agreed.   During the epidemic period, many companies failed or dismissed their employees because of business stagnation. On the contrary, Desheng looked for opportunities in adversity, set up technology R & D centers, increased R & D investment, and obtained a very good market feedback. As a professional carbomer manufacturer, Desheng bases itself on domestic market, expands international market, sincerely serves the society and pursues high quality High quality, is gradually becoming a modern, ecological, scientific and technological enterprises, welcome to consult and cooperate.