Human β-amyloid 40 ELISA detection kit This reagent is for research use only Specimen: Serum or plasma Test principle: Aβ40 kit is a solid-phase sandwich enzyme-linked immunosorbent assay (ELISA). Known standard concentration of Aβ40, unknown concentration The samples were added to the microplate for detection. First, Aβ40 and biotin-labeled antibody were incubated at the same time. After washing, HRP labeled with avidin was added. After incubation and washing, the unbound enzyme conjugate is removed, and then substrates A and B are added to act simultaneously with the enzyme conjugate. Produce colors. The color depth is proportional to the concentration of Aβ40 in the sample. Bring your own material distilled water. Sampler: 5ul, 10ul, 50ul, 100ul, 200, 500ul, 1000ul. Oscillator and magnetic stirrer etc. Safety Avoid direct contact with the stop solution and substrates A and B. Once exposed to these liquids, rinse with water as soon as possible. Do not eat, drink, smoke or use cosmetics during the experiment. Do not use your mouth to absorb any ingredients in the kit. Handling precautions Reagents should be stored according to label instructions, and returned to room temperature before use. The sparse standards should be discarded and cannot be stored. The slats not used in the experiment should be immediately returned to the packaging bag, sealed and stored to avoid deterioration. Unused other reagents should be packed or covered. Do not mix reagents of different batches. Use before warranty. Use a disposable pipette tip to avoid cross-contamination, and avoid using a sampler with a metal part when drawing the stop solution and substrates A and B. Use a clean plastic container to prepare the washing solution. Mix all components and samples in the kit thoroughly before use. When washing the enzyme-labeled plate, it should be fully patted dry. Substrate A should evaporate to avoid opening the lid for a long time. Substrate B is sensitive to light and avoid prolonged exposure to light. Avoid contact with hands, it is toxic. The OD value should be read immediately after the experiment is completed. The order of adding reagents should be the same to ensure that all wells are incubated for the same time. Perform the incubation operation according to the time, the amount and order of the liquid indicated in the instructions. Human β-amyloid 40 ELISA detection kit sample collection, processing and storage methods Serum ----- Avoid any cell stimulation during the operation. Use test tubes free of pyrogens and endotoxins. After collecting blood, centrifuge at 1000 × g for 10 minutes to separate the serum and red blood cells quickly and carefully. Plasma ----- EDTA, citrate, heparin plasma can be used for detection. Centrifuge at 1000 × g for 30 minutes to remove particles. The cell supernatant was centrifuged at 1000 × g for 10 minutes to remove particles and polymers. Storage ------ If the sample is not used immediately, it should be divided into small parts and stored at -70 ℃ to avoid repeated freezing. If possible, do not use hemolysis or hyperlipidemia. If there are a large number of particles in the serum, centrifuge or filter before testing. Do not thaw at 37 ° C or higher. Thaw at room temperature and ensure that the sample is thawed evenly and adequately. Reagent preparation standards: Serial dilutions of standards should be prepared during the experiment and cannot be stored. Before dilution, the standard was mixed by shaking. Dilution of washing buffer (50 ×): 50-fold dilution with distilled water. Before use, mix all reagents thoroughly. Don't make the liquid generate a lot of foam, so as to avoid adding a large number of bubbles during sample addition, which will cause errors in sample addition. The number of slats required is determined by the number of samples to be tested plus the number of standard products. It is recommended to make multiple holes for each standard and blank hole. Each sample is determined according to its own quantity, and those that can use multiple holes can be used as much as possible. Add 50ul of the diluted standard to the reaction well and 50ul of the sample to be tested in the reaction well. Immediately add 50ul of biotin-labeled antibody. Cover the membrane plate, gently shake and mix, and incubate at 37 ° C for 1 hour. Shake off the liquid in the wells, fill each well with washing liquid, shake for 30 seconds, shake off the washing liquid, pat dry with absorbent paper. Repeat this operation 3 times. If washing with a plate washer, the number of washes is increased once. Add 80 ul of streptavidin-HRP to each well, gently shake and mix, and incubate at 37 ° C for 30 minutes. Shake off the liquid in the wells, fill each well with washing liquid, shake for 30 seconds, shake off the washing liquid, pat dry with absorbent paper. Repeat this operation 3 times. If washing with a plate washer, the number of washes is increased once. Add 50ul of substrate A and B to each well, mix gently by shaking, and incubate at 37 ° C for 10 minutes. Avoid light. Remove the enzyme labeling plate and quickly add 50ul of stop solution. After adding the stop solution, the results should be measured immediately. The OD value of each well was measured at a wavelength of 450 nm. The results of the human beta amyloid 40 ELISA detection kit limited to standard No. 6 and above are non-linear, and accurate results cannot be obtained based on this standard curve. Kit performance 1. Sensitivity: The minimum detection concentration is less than No. 1 standard. Linearity of dilution. The coefficient R of the linear regression of the sample and the expected concentration is 0.990. 2. Specificity: Does not react with other human cytokines. 3. Repeatability: The coefficients of variation within and between plates are less than 10%. Judgment and analysis of results 1. Instrument value: read the OD value of each well on a microplate reader with a wavelength of 450 nm. 2. Take the absorbance OD value as the ordinate (Y), and the corresponding Aβ40 standard concentration as the abscissa (X). To make the corresponding curve, the Aβ40 content of the sample can be converted to the corresponding concentration from the standard curve according to its OD value. 3. Detection value range: 0-80ng / ml 4. Sensitivity: 0.1 ng / ml human β amyloid 40 ELISA detection kit DA2634-0.1ml PAR-1 (Protease-activated receptors-1) Protease activated receptor-1 antibody 0.1ml DA2634-0.2ml PAR-1 (Protease-activated receptors-1) protease activated receptor-1 antibody 0.2ml DA2635-0.1ml PAR-2 ​​(Protease-activated receptors-2) protease activated receptor-2 antibody 0.1ml DA2635-0.2ml PAR-2 ​​(Protease-activated receptors-2) Protease activated receptor-2 antibody 0.2ml DAY1055-0.1ml dog IgM / Cy3 fluorescein Cy3 labeled dog IgM 0.1ml DAY1056-0.1ml Goat IgM / Cy3 fluorescein Cy3 labeled sheep IgM 0.1ml DAY1057-0.1ml Guinea pig IgG / Cy3 fluorescein Cy3 labeled guinea pig IgG 0.1ml DAY1058-0.1ml Guinea pig IgM / Cy3 fluorescein Cy3 labeled guinea pig IgM 0.1ml DAY1059-0.1ml Horse IgG / Cy3 fluorescein Cy3 labeled horse IgG 0.1ml DAY1060-0.1ml Horse IgM / Cy3 fluorescein Cy3 labeled horse IgM 0.1ml DA2636-0.2ml PAR4 (protease-activated receptor 4) protease activated receptor 4 / prostate cell apoptosis protein 4 antibody 0.2ml DA2637-0.2ml Parkin protein Parkin protein antibody 0.2ml DA26 38-0.2ml PARP (poly ADP-ribose polymerase) polyadenosine diphosphate polymerase antibody 0.2ml DA2639-0.2ml PARP (poly ADP-ribose polymerase) N-Terminus polyadenosine diphosphate polymerase antibody (N-terminal) 0.2ml DA2640 -0.2ml PAX1 (Paired box gene 1) Paired box gene 1 antibody 0.2ml DA2641-0.2ml PAX2 (PAX2 Paired box gene 2) Paired box gene 2 antibody 0.2ml DA2642-0.2ml PAX3 (Paired box gene 3) Paired box gene 3 Antibody 0.2ml DA2643-0.2ml PAX5 (Paired box gene 5) Pairing box gene 5 antibody 0.2ml
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3.Separate the handles of the hand-held can opener and place the cutting blade on the top edge of the can. Squeeze handle together and turn crank attached to the cutting gear until the lid is open.
4.Push down the lid with clean fingers, a paper towel or spoon, then lift it off, being careful to not cut your fingers.
5.Wash can openers after every use. Carefully wipe off the blade with a clean cloth and hot soapy water. The cutting edge of a can opener is one of the leading places for bacteria to grow. It can cause food-borne illness.
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