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.
1 Under the right environmental conditions, any compound that has polar covalent bonds can form hydrogen bonds. 2  Click here to see some different kinds of hydrogen bonds. 3  Importance. 4  Hydrogen bonds are extremely important in biological systems. 5  Thier presence explains many of the properties of water.