If you are business minded, a nurse that makes house calls may be the business opportunity for you. In fact, this is historically how most nurses practiced until the 1940s. It is an area with huge growth potential.
Smell is chemistry, and the chemistry of old books gives your cherished tomes their scent. As a book ages, the chemical compounds usedâthe glue, the paper, the inkâbegin to break down. And, as they do, they release volatile compoundsâthe source of the smell. A common smell of old books, says the International League for Antiquarian Booksellers, is a hint of vanilla: âLignin, which is present in all wood-based paper, is closely related to vanillin. As it breaks down, the lignin grants old books that faint vanilla scent.â
The fact is that vinegar which is usually made from fermented fruit juice also contains acetic acid which is the main reason for the smell of vinegar. As the aspirin breaks down into acetic acid and salicylic acid, the acetic acid in it causes the smell to be like that of vinegar.his makes people to wonder why does old aspirin smell like vinegar. The main reason for the smell is that the composition of the drug is such that once the drug has been stored for some time, the drug starts to degenerate causing the smell.