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sulfuric acid/càncer
L'enllaç es desa al porta-retalls
Pàgina 1 des de 56 resultats
Occupational exposure to sulfuric acid in southern Ontario, Canada, in association with laryngeal cancer.
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A case-referent study, designed to test associations between asbestos, nickel, and the development of laryngeal cancer, was conducted in southern Ontario in 1977-1979. The cases were individually matched to neighborhood referents for gender and age. This constituted the primary study. Personal
Epidemiologic evidence on the relationship between mists containing sulfuric acid and respiratory tract cancer.
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This review identified and evaluated 25 epidemiologic studies pertaining to the carcinogenicity of mists containing sulfuric acid (MSA). Few studies were designed with acid mists as the principal exposure under investigation, and in all studies exposure assessment was limited. The results of the
Laryngeal cancer and occupational exposure to sulfuric acid.
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Workers on an ethanol unit which used sulfuric acid in strong concentrations at a large refinery and chemical plant in Baton Rouge, Louisiana were reported, in 1979, at excess risk for upper respiratory cancer. The carcinogen implicated by indirect evidence was diethyl sulfate. However, with the
Crystalline camptothecin-20(S)-O-propionate hydrate: a novel anticancer agent with strong activity against 19 human tumor xenografts.
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To find a more effective and less toxic chemotherapeutic agent, we have successfully prepared crystalline camptothecin-20(S)-O-propionate hydrate (CZ48) by reacting camptothecin with propionic anhydride using concentrated sulfuric acid as catalyst. The biological effectiveness of this new anticancer
Reaction product inactivation of aryl sulfotransferase IV following electrophilic substitution by the sulfuric acid ester of N-hydroxy-2-acetylaminofluorene.
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Rat liver N-hydroxy-2-acetylaminofluorene (N-OH-2AAF) sulfotransferase activity is mediated by aryl sulfotransferase IV (AST IV) and causes the bioactivation of N-OH-2AAF to a highly reactive sulfuric acid ester form putatively capable of inducing liver cancer. Dietary administration of
Respiratory cancer among soap production workers.
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Employment in the soap production industry in Italy has entailed some exposure to sulfuric acid vapors and nickel dusts, both agents under suspicion of being carcinogenic for the respiratory tract. A mortality study, together with an incidence study for laryngeal cancer, has been conducted among 361
A population-based case-control study of occupational exposure to acids and the risk of lung cancer: evidence for specificity of association.
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Occupational exposure to strong inorganic acid mists containing sulfuric acid has been recognized as a carcinogen (Group 1) since 1992. An augmented, secondary data analysis of a population-based case-control study of lung cancer was conducted to assess lung cancer-specific risks using 772 lung
Laryngeal cancer incidence among workers exposed to acid mists (United States).
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In 1992, the International Agency for Research on Cancer (IARC) determined that sufficient evidence existed to classify sulfuric acid mists as a human carcinogen, based primarily on six human studies. Possible mechanisms include irritation of epithelial cells in conjunction with cigarette smoking,
Epidemiological factors of cancer in Louisiana.
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Certain Louisiana cancer rates are higher than the national averages. This review evaluates the existing epidemiologic literature pertaining to risk factors for cancer in Louisiana. Population-based case-control studies have identified smoking as the most important contributor to lung cancer in
Purification, characterization and in vitro anti-tumor activity of proteins from Arca subcrenata Lischke.
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Two purified proteins G-6 and G-4-2 were obtained from Arca subcrenata Lischke using the homogenization, salting-out with ammonium sulfate, ion-exchange chromatography and gel filtration chromatography techniques. The purity of G-6 and G-4-2 was over 96%, as measured by RP-HPLC. G-6 and G-4-2 were
The adjuvant effects of Antrodia Camphorata extracts combined with anti-tumor agents on multidrug resistant human hepatoma cells.
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OBJECTIVE
The objectives of this study were to investigate the adjuvant anti-tumor effects of Antrodia camphorate in human hepatoma cells (C3A and PLC/PRF/5) which are resistance to most anti-tumor agents, elucidate the possible regulation pathways, and measure the tumor growth and survival rate in
Synthesis of a tetra- and a trisaccharide related to an anti-tumor saponin "Julibroside J28" from Albizia julibrissin.
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Simple and convergent synthesis of a tetra- and a trisaccharide portions of an antitumor compound Julibroside J(28), isolated from Albizia julibrissin, that showed significant in vitro antitumor activity against HeLa, Bel-7402 and PC-3M-1E8 cancer cell lines is reported. The tetrasaccharide has been
Adenosine conjugated lipidic nanoparticles for enhanced tumor targeting.
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Delivering chemotherapeutics by nanoparticles into tumor is impeded majorly by two factors: nonspecific targeting and inefficient penetration. Targeted delivery of anti-cancer agents solely to tumor cells introduces a smart strategy because it enhances the therapeutic index compared with untargeted
[Structural analysis and anti-tumor activity in vivo of polysaccharide APS-2a from Angelica sinensis].
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The polysaccharide APS-2a was isolated from Angelica sinensis (Oliv.) Diels through water extraction, deprotein, ethanol precipitation and DEAE-sephades A-25 column chromatography respectively,and was further purified by Sephacryl S-400 and Sephadex G-100 column chromatography. The phenol-sulfuric
Antitumor activity of resveratrol and its sulfated metabolites against human breast cancer cells.
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Resveratrol (3,4',5-trihydroxy- trans-stilbene) is a naturally occurring polyphenolic compound found in grapes, wine and medicinal plants with a variety of biological and pharmacological activities including pronounced anticancer properties. These effects are observed despite its extremely low
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