Dark Stool: If your stool is black or bright red in color, it can mean that you are bleeding internally, as a possible result of an ulcer or cancer, and warrants a call to your doctor even if you think it could be hemorrhoids, or tiny tears in the anal tissue, due to constipation and straining.
The chemical reaction in which high molecular mass molecules are formed from monomers is known as polymerization. There are two basic types of polymerization, chain-reaction (or addition) and step-reaction (or condensation) polymerization.
Polymers are very large molecules (sometimes called macromolecules). Each polymer molecule is a long chain of (mainly carbon) atoms.Polymers are made from many smaller molecules, called monomers. These monomers (the starting materials) are often alkenes.The process (chemical reaction) that turns monomers into polymers is called polymerisation. The conditions used for polymerisation are heat, pressure and a catalyst.olymers produce a very wide range of materials with many uses. New materials are often used to replace older ones because the new material has superior properties. The properties of the material depend on what the polymer is made from and its structure. The general public know polymers as plastics.