When we are ready for the experiment and are about to finish, how do we determine the results of the ELISA kit http://? They are quantitative, semi-quantitative, and qualitative. Let's take a look.
1. Quantitative determination: ELISA is performed after a series of dilutions using a known standard. The sample is simultaneously measured with the sample to be tested, and a standard curve is drawn. The result is expressed in absolute or active units.
2. Semi-quantitative determination: The results are generally expressed in titers. After serial dilution of the specimen, an ELISA test is performed, and the highest dilution above the positive cutoff value is the "titer" of the specimen.
3, qualitative determination (1) positive determination value method (cut-off value, CO value): generally the negative control average A value plus a constant, reagent preparation is strictly standardized, first calculate the positive control A value average and negative The average of the control A values. Specimen A value ≥ CO value is positive.
(2) Inhibition rate method: In the competition inhibition method, the result can be expressed by the inhibition rate. Inhibition rate (%) = (A negative control A-A to be tested) / negative control X 100%, generally positive inhibition rate ≥ 50%.
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High Power High Voltage Power Supplies
The High-power High Voltage Power supply is a customized high-voltage power supply family developed by iDealTek-Electronics based on the design and development of IGBT switching elements.
HP series High power high-voltage power supply is the first generation high-power HVPS designed by iDealTek-Electronics, adopting the standard 19-inch chassis structure to facilitate the integrated installation of high-voltage systems. The output power ranges from 5kW to 15kW (single unit), with the output voltage ranging from 1KV to 60kV.
HPS series ultra-high-power high-voltage power supplies are developed on the basis of HP series using internal high-power high voltage modules in parallel built in 19-inch standard cabinet with control, inverter, high voltage transformer split design structure, output power ranges from 50KW to 300KW with output voltage up to 300KV. The power supplies adopt a mixed cooling method of air cooling of the control part, water cooling and oil cooling of the main power unit. The internal module redundancy technology and perfect protection circuit ensure the excellent reliability of the power supply under high-voltage and high-power output.
Compared with the traditional linear high power High Voltage Power Supplies, our high-power high voltage power supplies of IGBT-based topology can achieve output power beyond that of the linear high voltage power supplies and also break through the ceiling where the output voltage cannot exceed tens of KV, besides the same electronic characteristics of high precision low ripple and high stability as the linear high-voltage power supplies, our high power high voltage power supplies are also featured for high efficiency, fast response characteristics that linear high voltage power supply can't match.
At present, the production of high power high voltage power supplies is difficult and the applications are diverse and scattered. Basically, they are mainly customized. The industries that have been aiding include mining gravel, ultra-high-power capacitor charging, electron beam melting, electron gun, ion acceleration, ion implantation and other cutting-edge industries.
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Yangzhou IdealTek Electronics Co., Ltd. , https://www.idealtekpower.com