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Roche is a pharmaceutical and diagnostics company that produces a wide range of products, including reagents for laboratory use. Reagents are substances or compounds used in chemical analysis or other laboratory procedures to detect, produce, or measure other substances. Roche Diagnostics, a division of Roche, is known for manufacturing diagnostic solutions, including a variety of reagents for clinical chemistry, immunoassays, molecular diagnostics, and more. The specific reagents produced by Roche can vary widely depending on the application and the diagnostic platform.

Vannin Healthcare offers several effective COVID-19 tests: SGTi-flex COVID-19 IgM/IgG (25 tests per kit) STANDARD Q COVID-19 IgM/IgG Duo Test (40 tests per kit) Anti-SARS-CoV-2 Rapid Test (50 tests per kit) General Features Can detect and differentiate between IgM and IgG antibodies Convenient: no additional equipment necessary Extremely fast: results in 10-15 minutes Point-of-care testing Allow rapid decision-making in high-stakes situations Why our tests Certified: CE-IVD marked, FDA-cleared, ISO 13485, Korea GMP-certified Reliable: high clinical specificity and selectivity Easy to interpret Can detect antibodies even in asymptomatic patients Vannin Healthcare Global offers various diagnostic and serology tests for identifying the presence of Severe Acute Respiratory Syndrome Coronavirus2 (SARS-CoV-2). SARS-CoV-2 is the virus that causes COVID-19 which means that its presence could indicate that a person has been infected. There are two types of tests currently used to determine the presence of the virus: Molecular diagnostic tests or viral tests (Swab tests) Antibody serology tests (Blood tests) Vannin Healthcare Globalâ??s Serology Tests To find out whether antibodies are present in an obtained sample (whole blood, plasma, or serum), serology tests are used. The presence of antibodies could indicate a past infection. And depending on the type of the immunoglobulins present, it could also determine the approximate time when the infection occurred. After fighting a coronavirus, our bodies are likely to produce two classes of antibodies: IgM and IgG. In the case of SARS-CoV-2, both IgM and IgG are most likely to occur simultaneously within two to three weeks after a personâ??s been infected. For a firmer diagnosis, Vannin Healthcare Global offers serology tests that check for both IgM and IgG antibodies. Can detect and differentiate between IgM and IgG antibodies Differentiating between the antibodies is crucial when it comes to providing proper medical advice to your patients. The appearance of IgM antibodies is the initial response of the organism fighting to suppress the virus. These antibodies could indicate that the patient is still infectious, and advising patients to self-isolate is the appropriate course of action. IgG antibodies can be detected in the blood sample usually within7-10 days after the onset of infection. If a patient has IgG antibodies, and no IgM antibodies, they have developed a temporary immunity to COVID-19. No additional equipment necessary The test design makes it a perfect choice for remote areas without access to fully-equipped laboratories. Simply obtain a blood sample from a patient, and add 10�µl into the appropriate place on the testing cassette along with three drops (90�µl) of the buffer. The results will appear in 10-15 minutes. Point-of-care testing Being easy-to-interpret and fast, it is ideal for rapid decision-making in the ICU or during a consultation with a patient. In medical disaste

Introduction: 4-hydroxyethyl piperazine ethosulfonic acid (HEPES) is an important hydrogen ion buffer, which has a good buffer ability in the pH range of 6.8 to 8.2, and can control a constant pH for a long time. Using a concentration of 10 ~ 50mmol/L, the general culture medium containing 20mmol/L 4-hydroxyethyl piperazine taurine can have a good buffer capacity, and has no toxic effect on cells. Application: HEPES (4-hydroxyethyl piperazinethesulfonic acid) is a non-ionic amphoteric buffer with high polarity, and is inert to a variety of chemical reagents and enzymes. It does not participate in and interfere with the process of biochemical reactions, and has no inhibitory effect on enzyme chemical reactions. Therefore, it can be used specifically for the research of proteins and enzymes that are highly volatile and ph-sensitive to organelles and very volatile. Buffer solution preparation: (1)hepes buffer can be directly added to the prepared culture medium according to the desired concentration, and then filtered to remove bacteria. 2.38 g HEPES was added to each 1000ml of culture medium, the pH was adjusted to 7.2 with lNNaOH after dissolution, and the bacteria were removed by filtration before use. At this time, the concentration of HEPES was 10mmol/L. (2) 100x storage solution (lmol/L) could also be prepared. Before use, 99ml culture solution was added to lml storage solution, and the final concentration was 10mmol/L. lmol/L (100x) hepes buffer was prepared as follows: 23.8gHEPES was dissolved in 90ml double distilled water, the pH was adjusted to 7.5-8.0 with lNNaOH, and then the water was fixed to 100ml, filtered to remove bacteria, divided into vials (2ml/ bottle), and stored at 4�ºC or -20�ºC. Purpose: 1.Biological buffer; Reaction buffer, prehybridization buffer and hybridization buffer for isolation and analysis of RNA nuclear fraction; For RNA with T4RNA 2.Molecular biology grade is used for RNA3' -end labeling with T4 RNA ligase 3.Cell-cell adhesion, short-term cell aggregation culture, cleaning of tissue and cell buffer