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Quantification of Naturally Occurring Pyrrole Acids in Melanosomes[dagger]
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ABSTRACT
Three naturally occurring pyrrole acids were found in Sepia, human black hair, and bovine choroid and iris melanosomes using high-performance liquid chromatography and mass spectrometry-pyrrole-2,3-dicarboxylic acid (PDCA), pyrrole-2,3,5-tricarboxylic acid (PTCA) and pyrrole-2,3,4,5-tetracarboxylic acid (PTeCA). PDCA and PTCA are common markers quantified from oxidative degradation of eumelanins. Using standards, the amounts of naturally occurring PDCA and PTCA were determined and compared to those obtained following peroxide oxidation of the same samples. Because the naturally ...
Related newspaper, magazine, and trade journal articles from HighBeam Research
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STATEMENT OF SENATOR FEINSTEIN ON EPA'S REPORT ON NATURALLY OCCURRING ASBESTOS IN EL DORADO
; ...Senator Feinstein on EPA's Report on Naturally Occurring Asbestos in El Dorado Contact: Howard...EPA) on the increased exposure to naturally occurring asbestos in El Dorado, California...statement: "It is now clear that naturally occurring asbestos poses health risks to those...
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Naturally occurring metals in ground water.(Brief Article)
; ...metals and possibly other major naturally occurring elements (including radionuclieds...representative of the metal concentrations naturally occurring in the formation water because formation...contaminant such as lead, which is both naturally occurring and a contaminant. In this ...
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Identical to nature.(abstracts)(lycopene ingredients from BASF Corp.)(Brief article)
; A naturally occurring carotenoid found in tomatoes...and provide the benefits of naturally occurring lycopene cost effectively...equivalent in bioavailability to naturally occurring lycopene. BASF Corporation...
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What's the threat of chemicals in food? (excerpt from National Research Council's 'Carcinogens and Anticarcinogens in the Human Diet' report) (includes information about dietary fat, caloric intake, and cancer, and about naturally occurring chemicals in the food supply)
; ...Committee on Comparative Toxicity of Naturally Occurring Carcinogens--which concluded, in...contend that the percentage of naturally occurring chemicals testing positive for carcinogenicity...There are, after all, many more naturally occurring chemicals than synthetic. In fact...
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A framework for applying explanations of alcohol-related aggression to naturally occurring aggressive behavior
; ...can be applied systematically to naturally occurring aggressive behavior associated with...applicability to two examples of naturally occurring incidents of aggression, one based...literature in descriptive studies of naturally occurring aggression. Both the theoretical...
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Nearby natural asbestos deposits increase mesothelioma risk.(Pulmonary Medicine)
; ...people who live near deposits of naturally occurring asbestos, Marc Schenker, M.D., and...epidemiologic study of mesothelioma and naturally occurring asbestos to date concluded that...study supports the hypothesis that [naturally occurring asbestos] causes mesothelioma, Dr...
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Environmentally smart polymers.(material matters column)
; ...of polymers that emulate certain naturally occurring polymers and demonstrate exquisite...could be made in the likeness of naturally occurring materials and textiles, but with...reproduce synthetically some of the naturally occurring fibres that were so useful in clothing...
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Court Upholds Clam Theft Rules
; OLYMPIA (AP) - Naturally occurring clams on private property...common law has held that naturally occurring clams on private tidelands...Longshore's argument that naturally occurring shellfish on private tidelands...
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NORM regs enter ceramic arena. (naturally occurring radioactive material contamination) (Column)
; ...rld's environment, Certain naturally occurring materials used as raw...ceramic industry do contain naturally occurring radioactive materials...materials which contain naturally occurring radioactive nuclides...
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Sankyo, MerLion Pharmaceuticals to Jointly Develop New Agents from Naturally Occurring Substances
; ...partnership, the two companies will search and develop new agents made from naturally occurring substances. Specifically, by leveraging samples of naturally occurring substances provided by MerLion and Sankyos expertise in compound evaluation...
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