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.
Cyclophosphamide is an alkylating agent that has an effective anticancer activity. It introduces alkyl radicals into DNA strands of cells and stops cancer cells from growing. It has also an immunosuppressive effect â suppress the bodyâs natural immune response, and used to treat some autoimmune diseases.