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.
For Hydrogen bonding, the Hydrogen must be bonded with some strongly electronegative atom (F,O,N) But in ethers the bonding is R-O-R. All the hydrogens are attached to carbons and no H is attached with the electronegative oxygen. But in aqueous solutions, provided the ether is not too sterically crowded, the ether molecules can form Hydrogen bonds with the water molecules.