Abstract: A photodynamic composite including a porphyrin having four quaternized nitrogens, wherein the porphyrin is covalently bonded to a polymer containing reactive amines covalently bonded to a solid-state support is claimed. A method for sanitizing contaminated water is claimed including exposing the contaminated water to the photodynamic composite, in the presence of light and oxygen, wherein, a sufficient quantity of singlet oxygen and super oxide anions is provided by the chemical reaction of the light and the photosensitizer to destroy the pollutants or pathogens present in the contaminated water and to oxidize organic contaminants into carbon dioxide and water; thereby rendering the water potable.

Abstract: An interface device that enables a severely handicapped individual to control a telephone to place and terminate calls and to carry on a conversation regardless of whether the individual can speak or use his or her hands. A personal computer is programmed to display a menu for the handicapped individual to read wherein a selectable area of the menu is active for a period of time. After the period of time, the next selectable area of the menu is active for another period of time. The program makes each menu selection active in a predetermined order. A sensor that detects voluntary motion of the handicapped individual is connected to a transducer that converts the motion detected into a computer input, such as a mouse “click,” which selects the active area on the menu. Advantageously, the process may begin again or may move to another menu, depending upon the item selected.