Abstract: A method for the treatment of a particular volume of plant or animal tissue comprising the steps of treating the plant or animal tissue with at least one photo-active molecular agent, wherein the particular volume of the plant or animal tissue retains at least a portion of the at least one photo-active molecular agent, and then treating the particular volume of the plant or animal tissue with light sufficient to promote a simultaneous two-photon excitation of at least one of the at least one photo-active molecular agent retained in the particular volume of the plant or animal tissue, wherein the at least one photo-active molecular agent becomes active in the particular volume of the plant or animal tissue. There is also disclosed a method for the treatment of cancer in plant or animal tissue and a method for producing at least one photo-activated molecular agent in a particular volume of a material.

Abstract: A method for cleaning unwanted materials from a swimming pool having water and a water recirculation filtration system wherein the water circulates through the recirculation filtration system. The method comprises the steps of placing microscopic air bubbles having a size of in the range of from abut 0.1 mm to about 0.001 mm into water circulating through the water recirculation filtration system, circulating the microscopic air bubbles into the water of the swimming pool for a period of time sufficient to precipitate onto unwanted materials in the pool, allowing the materials to float to the top of the surface of the water, and removing the unwanted materials from the surface of the pool. An apparatus for accomplishing the method is also disclosed.

Abstract: A method for the removal of mercury from soil, wherein the soil has been contaminated with mercury. The method comprises the following steps. Soil is added to one end of an internally fired hollow screw desorber under a vacuum in the range of from about 15 inches of mercury to about 30 inches of mercury. The soil is moved from the one end of the internally fired hollow screw desorber to another end of the desorber and the temperature of the soil is increased in the desorber as it moves from the one end of the desorber to the other end, wherein the temperature of the soil is increased from a temperature in the range of from about ambient to about 150.degree. F. to a temperature in the range of from about 800.degree. F, to about 1500.degree. F. A mercury vapor is produced in the internally fired hollow screw desorber. The soil is removed from the other end of the desorber while the mercury vapor is removed from the internally fired hollow screw desorber. Mercury is then recovered from the mercury vapor.