One remedy for a deficiency of vitamin B12 for the elderly is a regular injection of this important nutrient. The vitamin B12 injection dose depends on factors such as gender and age.
Hydrogen bonds happen in alcohols. As a matter of fact, any molecule that contains a hydrogen atom attached to an atom of nitrogen or oxygen is capable of such a bond. Ethanol is one such alcohol that features hydrogen bonds. Ammonia is an example of hydrogen bonding. In the case of ammonia, however, the hydrogen bond happens to be relatively weak.
Hydrogen bonds are primarily formed between molecules as an electrostatic attractions. Hydrogen bonding is the key to water's unique properties as a universal medium. Hydrogen bonds can also form between parts of the same molecule, giving it increase stability. The shape of DNA and large proteins, for example, is maintained by hydrogen bonds within the molecule. general equation for synthesis