A brain natriuretic peptide (BNP) test measures the amount of the BNP hormone in your blood. BNP is made by your heart and shows how well your heart is working.Normally, only a low amount of BNP is found in your blood.uide. A brain natriuretic peptide (BNP) test measures the amount of the BNP hormone in your blood. BNP is made by your heart and shows how well your heart is working. Normally, only a low amount of BNP is found in your blood.
Bacterial cultures can be preserved for long by suspending in glycerol broth and storing at -20 to -70 degree Celsius. The protocol as below: To 0.85 ml of bacterial culture, add 0.15 ml of sterile glycerol (sterilized by autoclave, final glycerol concentration : 15%, v/v).
Bacterial Culture Media, their PH Indicators and color of bacterial colonies 4.86/5 (7) 1  Cystine Lactose Electrolyte Deficient Agar (CLED): In CLED media, lactose fermenting colonies of Escherichia coli gives pale yellow colonies whereas non lactose fermenting colonies of Proteus, Salmonella etc gives blue colored colony.