Abstract: Methods for treating toxic chlorinated dibenzo-p-dioxin-contaminated media by photolytic degradation are disclosed. Soil contaminated wiht such toxins are contacted with a photolysis-activating agent such as 1-hexadecylpyridinium chloride and irradiated with UV radiation in the presence of one or more hydrogen donors.

Abstract: This invention is generally directed to toner compositions comprised of a magnetic material and a resin comprising a polymeric esterification product of 1,4-benzenedicarboxylic acid polymerized with 1,2,4-benzenetricarboxylic aicd-cyclic 1,2-anhydride and 2,2-dimethyl-1,3-propane diol. The magnetic material can act as both the colorant and magnetic substance, or an additional colorant such as carbon black can be utilized. The toners of the present invention in one preferred embodiment are useful for developing magnetic images.

Abstract: This invention generally is directed to methods for developing images, including latent magnetic and electrostatic images, which involves forming latent images on a suitable substrate and contacting the image with a toner comprising a polymeric esterification product of 1,4-benzene-dicarboxylic acid polymerized with 1,2,4-benzenetricarboxylic acid - cyclic 1,2-anhydride and 2,2-dimethyl-1,3-propane diol in a magnetic material. The toner composition described is particularly useful in a magnetic imaging system. The magnetic material can act as both the colorant and magnetic substance, or an additional colorant such as carbon black can be utilized.

Abstract: This invention is generally directed to magnetic toners comprised of a styrene butadiene copolymer resin, and a cubically shaped magnetite material, which toners have a fusing latitude range of at least 30 degrees Fahrenheit up to a maximum temperature of 390 degrees Fahrenheit. Toners having melt fusing temperatures of from about 300 degrees Fahrenheit to about 375 degrees Fahrenheit are desirable. The preferred cubical magnetite used is Mapico Black, which is present in amounts of from about 40 percent to about 70 percent. The toners of the present invention are useful for example in magnetic imaging systems, especially systems employing heat pressure fusing and high speed fusing systems.