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).
Extreme Freezing. Extreme freezing can generally stop bacterial growth and/or kill bacteria. The colder the temperature the fewer bacteria that can survive and grow. That is why keeping food cool retards spoilage.xtreme Freezing. Extreme freezing can generally stop bacterial growth and/or kill bacteria. The colder the temperature the fewer bacteria that can survive and grow. That is why keeping food cool retards spoilage.