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).
Culturing bacteria is also the initial step in studying its morphology and its. identification. 3. Bacteria have to be cultured in order to obtain antigens from developing. serological assays or vaccines. 4. Certain genetic studies and manipulations of the cells also need that bacteria. be cultured in vitro. 5. Culturing bacteria also provide a reliable way estimating their numbers. (viable count).