The Symbolism of Water. Many works of literature use symbols to represent abstract ideas. One symbol that is commonly used is water. Water is a viable symbol because it is versatile. It can be used to represent many different ideals because water in itself is ever changing. Water is used in many works to represent such ideals as death, life, love, betrayal, purity, holiness, and so on.
Alkylating Agents. Alkylating agents were one of the earliest classes of drugs used to treat cancer, beginning in the 1940âs. The biggest weakness of most cancer cells is that they are very sensitive to DNA damage. Alkylating agents work by reacting with the proteins that bond together to form the very delicate double helix structure of a DNA molecule, adding an alkyl group to some or all of them.
In addition to their significance in living organisms, chelates are also economically important, both as products in themselves and as agents in the production of other chemicals. A chelate is a chemical compound composed of a metal ion and a chelating agent.A chelating agent is a substance whose molecules can form several bonds to a single metal ion. In other words, a chelating agent is a multidentate ligand. An example of a simple chelating agent is ethylenediamine.ethylenediamine. A single molecule of ethylenediamine can form two bonds to a transition-metal ion such as nickel(II), Ni 2+ .n addition to their significance in living organisms, chelates are also economically important, both as products in themselves and as agents in the production of other chemicals. A chelate is a chemical compound composed of a metal ion and a chelating agent.