Electronic Burglary Safes
Electronic burglary Safes are safes that have passed Chinese 3C certification and use digital password lock systems.
Details:
They are convenient, safe and easy to use;
The safes provide high levels of security;
The Passwords can be changed easily to prevent theft and they`re also quite convenient for official usage because the personnel turnover in the office is normal, hence changing passwords is necessary;
3 times wrong passwords will cause alarm;
The emergency supply can be used when the electricity is off or in case of a black out or EMP Surge;
They possess elegant designs hence they not only provide protection but also serve as decoration pieces.
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Rat apolipoprotein E (APO E) ELISA kit instructions
Shanghai Xitang Biotechnology Co., Ltd. 021-55229872, 65333639
Rat apolipoprotein E (APO E) ELISA kit
 ( used in serum, plasma, cell culture supernatants and other biological fluids )
principle
This experiment used double antibody sandwich ABC-ELISA. The anti-rat APO E monoclonal antibody was coated on the microtiter plate, the APO E in the standard and the sample was combined with the monoclonal antibody, and the biotinylated anti-rat APO E was added to form an immune complex attached to the plate. The root peroxidase-labeled Streptavidin is combined with biotin, the substrate working solution is blue, and finally the stop solution sulfuric acid is added. The OD value is measured at 450 nm. The APO E concentration is proportional to the OD value, which can be obtained by drawing a standard curve. APO E concentration in the specimen.
Kit composition ( 2-8 ° C preservation)
Coated Wells
96 holes
Enzyme Conjugate
12ml
10× specimen dilution (Sample Buffer)
12ml
20×Wash Buffer
50ml
Standards: 100ng/bottle
2 bottles
Substrate working fluid (TMB Solution)
12ml
Primary antibody working solution (Biotinylated Antibody)
12ml
Stop Solution
12ml
Prepare reagents and collect blood samples
1. Collection of specimens: serum, plasma (EDTA, heparin anticoagulation), cell culture supernatant, tissue homogenate, etc., as early as possible, stored at 2-8 ° C for 48 hours; longer time must be frozen (-20 °C or -70 °C) Save to avoid repeated freezing and thawing. Before the normal specimen is measured, dilute at least 1 : 20 with the specimen dilution (take 10ul, add 190ul of the dilution, and dilute 20 times).
2. Standard solution preparation: Add 0.5 ml of distilled water before use and mix to form a 200 ng/ml solution. Set the standard tube 8 tube, the first tube plus the standard dilution 900ul, the second to the eighth tube to add the sample dilution 500ul. Add 100 ul of 200 ng/ml standard solution to the first tube, mix and aspirate 500 ul with a pipette, and transfer to the second tube. Repeat the dilution as described above, and remove 500 ul from the seventh tube and discard it. The eighth tube is a blank control.
3. The 10× specimen dilution was diluted 1:10 with distilled water (example: 1 ml concentrated dilution + 9 ml distilled water).
4. Washing solution: diluted 1:20 with distilled water (example: 1 ml concentrated washing solution added to 19 ml of distilled water)
Test procedure
1. Loading: Add 100 ul of standard or sample to be tested in each well. Mix the reaction plate thoroughly and let it stand at 37 °C for 120 minutes.
2. Wash the plate: Wash the plate thoroughly with washing solution 4-6 times, and dry it on the filter paper.
3. Add 100 ul of the first antibody working solution to each well. The reaction plate was thoroughly mixed and placed at 37 ° C for 60 minutes.
4. Wash the board: the same as before.
5. Add 100 ul of enzyme-labeled antibody working solution per well. The reaction plate was placed at 37 ° C for 30 minutes.
6. Wash the board: same as before.
7. Add 100 ul of substrate working solution per well, set 37 The reaction was carried out in the dark at °C for 15 minutes.
8. Add 100 ul of stop solution to each well and mix.
9. Measure the absorbance at 450 nm using a microplate reader within 30 minutes.
Result calculation and judgment
1. All OD values ​​should be subtracted from the blank value before calculation.
2. Using standard products 20, 10, 5, 2.5, 1.25, 0.625, 0.312, 0 ng/ml as the abscissa and OD as the ordinate, plot on the coordinate paper and draw the standard curve.
3. Find the corresponding APO E content on the graph based on the OD value of the sample, and multiply by the dilution factor.
Kit performance
1. Sensitivity: The minimum APO E detection concentration is less than 0.15 ng/ml.
2. Specificity: Recombinant or natural rat APO E can be detected simultaneously. Does not cross-react with other cytokines in rats.
3. Repeatability: The coefficient of variation in both the plate and the plate is less than 10%.
Precautions
1. It is recommended to make double holes for the above standard holes and samples to be tested. The standard curve should be made at the same time for each measurement.
2. The washing process is critical. Insufficient washing will result in an accuracy error and an erroneous rise in the OD value.
3. After the slats are opened, the remaining slats should be sealed again to keep the slats dry .
4. This kit should be stored in a 4 o C refrigerator.
4. This kit is for scientific research only and cannot be used for clinical diagnosis!
Shanghai Xitang Biotechnology Co., Ltd. 021-55229872, 65333639
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