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Green fluorescent protein (GFP) isolated from the jellyfish species Aequorea Victoria, consists of 238 amino acids with a molecular weight of about 27 kDa. GFP is characterized by two absorption peaks in blue light at 395 nm (major) and 475 nm (minor) and a fluorescence peak at 498 nm in the green range. At present, the gene for this protein and proteins derived from it, glowing with different colors, is used as a luminous marker in cell and molecular biology to study protein expression in cells and living organisms in vivo. GFP also allows purification of recombinant proteins, where GFP or its derivatives are used as an affinity label.

The test tubes contain a buffer solution of sodium citrate, which is an anticoagulant. The ratio of citrate to the amount of blood taken is 1:9. Research material............... citrate plasma, blood Scope of application............................ coagulation study Centrifugation................................ 2000 - 2500 g - 10-15 minutes

The test tubes contain a buffer solution of sodium citrate, which is an anticoagulant. The ratio of citrate to the amount of blood taken is 1:9. Material for research............... citrate plasma, blood Scope of application............................ coagulation study Centrifugation................................ 2000 - 2500 g - 10-15 minutes

Provides complete tightness during transportation of biological material. The material of the container is polypropylene, the lid with a spoon is polyethylene. It has a graduated and frosted window for recording. Sterile.

We offer expert laboratories of physicochemical methods of analysis a gas chromatograph with a quadrupole mass spectrometric detector «MAESTRO-αMS». Quadrupole GC-MS «MAESTRO-αMS» is in demand for targeted research (screening) and non-targeted search. In targeted studies, it is necessary to detect given target compounds in samples of various nature and origin at the level of residual amounts, for example, several picograms of the target compound in the injected 1 μl of liquid sample. Most often, targeted research is carried out in the following areas of laboratory screening: ecology, food safety, clinical monitoring, narcology, doping control, production control of various raw materials. In targeted studies, it is often required not only to confirm the presence of a compound in a sample, but also to determine the level of its content quantitatively, since both the list of target compounds and the permissible level of their presence in the sample are specified by regulatory documents. Quantitative analysis requires standards for the substances you are looking for. When conducting a non-target search, as a rule, it is required to analyze a sample of unknown composition, in other words, to find as many compounds as possible in the sample and identify (identify) each of them. Since the identification of a detected compound is carried out by comparing its experimental mass spectrum with the spectrum of a pure substance obtained under standard conditions, this task requires reference libraries of mass spectra of pure substances, as well as tools for working with mass spectra, for example: algorithms for cleaning experimental mass spectra from background and spectral noise (mass spectrum deconvolution algorithms), library search and comparison algorithms. An off-target search is called a qualitative analysis, since the researcher is primarily interested in the list of detected substances, and not in the quantitative assessment of their content in the sample. When creating MAESTRO-αMS, we took into account our own many years of experience in operating imported analogues. We have made the device inexpensive. We have made the device compact: The modern design of the device made it possible to make the MAESTRO-αMS really compact, so that the device occupies the smallest possible area on the laboratory table. The layout of the device allows you to remove the ion source on the front flange for cleaning and replacing the cathodes, if necessary. We have reduced the cost of operation: When developing the MAESTRO-αMS, we sought to increase the resistance of the device to sample matrices and use a minimum of consumable materials in order to eliminate downtime for maintenance and replacement. As a result, we have created an extremely stable ion source and a perpetual photomultiplier detector. We have created special software: Even at the first acquaintance with the software, it becomes obvious that being in the window of each button and each parameter to be changed is expedient and logical. Our software product was created for the convenience of the operator, so we implemented the necessary and eliminated the unnecessary. We used the principle of one active window, in which the operator moves sequentially step by step, performing hardware settings, setting the data collection method, subsequent processing algorithms, templates for presenting the results. MAESTRO-αMS offers a wide range of scanning modes, built-in algorithms for working with mass spectral data, convenient unloading of initial data arrays for their processing in specialized software packages, graphics export for presentations and scientific publications. You can use several libraries of mass spectra at the same time, or create your own for your typical tasks. Finally, we provide a 5-day training course for professionals who want to understand the theoretical foundations of the method and their implementation in the hardware of modern quadrupole GC/MS. The volume and depth of presentation of the material from the developers of the device is intended to lay the foundation for the effective use of «MAESTRO-αMS» in the future. Some technical characteristics of MAESTRO-αMS: • Instrumental detection limit (SIM, OFN @272 m/z ) < 10 fg; • Scan modes: scan for selected ions, full scan in a given mass range, combined scan mode; • The number of simultaneously connected libraries of mass spectra is at least 10.

The potassium salt of ethylenediaminetetraacetic acid (EDTA) is the preferred anticoagulant for hematological studies. Material for research............... stabilized EDTA whole blood /EDTA plasma.

The walls of the tubes are coated with a dry clot formation activator (silicon dioxide) to accelerate blood clotting. Mixing blood with it does not affect the result of tests. The acceleration of the blood clotting process significantly reduces the preparation time of the biological sample. Material for research............... blood serum Scope of application............................ blood serum research in biochemistry, immunology Centrifugation................................ 1000 - 1500 g - 10 minutes

Test tubes are used for blood sampling in biochemistry and immunology. During centrifugation, the gel forms a strong barrier for 48 hours between the clot and the serum. The gel tubes must be centrifuged no later than 2 hours after blood collection. Material for research............... blood serum Scope of application............................ serum research in biochemistry, immunology Centrifugation.............................. 1500-2000 g - 10 minutes

The potassium salt of ethylenediaminetetraacetic acid (EDTA) is the preferred anticoagulant for hematological studies. Gel is a special material designed to form a stable barrier between the cellular components of blood and serum during centrifugation. Material for research............... EDTA-blood, plasma Scope of application............................ hematological examination of whole blood

IL-15 is a pleiotropic cytokine. It is essential for the development, survival, and activation of NK cells. Participates in the induction of cytotoxic effector cells. Acting as an interleukin-2 antagonist, IL-15 contributes to the maintenance of CD8+ T memory cells and the maintenance and survival of CD4+ and CD8+ T lymphocytes. Acts on a number of other cells.

Stewart's medium is a semi-liquid, nutrient-poor substrate and is designed to preserve and transport a wide range of microorganisms, such as Neisseria gonorrhoeae, Haemophilus influenzae, Salmonella sp. and others . Bacterial cultures are guaranteed to remain viable for up to 48 hours at a temperature of 15-20 ° C. The tampon probe is packed in a shock-resistant PP tube (12*150 mm). The test tube is provided with a label indicating: batch number, date of sterilization, expiration date, manufacturer, supplier, registration certificate, and also provides a place for applying information about the patient and the sample. The edge of the label is fastened with a stopper that closes the tube with a tampon - the label serves as the control of the first opening. Store at a temperature not lower than + 5 °C and not higher than + 25 °C.

The potassium salt of ethylenediaminetetraacetic acid (EDTA) is the preferred anticoagulant for hematological studies. Material for research............... EDTA-blood, plasma Scope of application............................ hematological examination of whole blood