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Página 1 a partir de 21 resultados
Analysis of sulphur and chlorine induced DNA cytosine methylation alterations in fresh corn (Zea mays L. saccharata and rugosa) leaf tissues by methylation sensitive amplification polymorphism (MSAP) approach.
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DNA (cytosine) methylation mechanism is another way through which plants respond to various cues including soil fertility amendments and abiotic stresses, and the mechanism has been used to infer some physiological, biochemical or adaptation processes. Despite numerous studies on global DNA
Uptake of calcium & chlorine in roots of Zea mays.
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NTP Toxicology and Carcinogenesis Studies of Chlorinated Paraffins (C23, 43% Chlorine) (CAS No. 108171-27-3) in F344/N Rats and B6C3F1 Mice (Gavage Studies).
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Toxicology and carcinogenesis studies of chlorinated paraffins (C23, 43% chlorine), an extreme-pressure lubricant and flame retardant, were conducted by administering the chemical in corn oil by gavage to groups of 50 F344/N rats and 50 B6C3F1 mice of each sex, 5 days per week for 103 weeks.
NTP Toxicology and Carcinogenesis Studies of Chlorinated Paraffins (C12, 60% Chlorine) (CAS No. 108171-26-2*) in F344/N Rats and B6C3F1 Mice (Gavage Studies).
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Toxicology and carcinogenesis assessments of chlorinated paraffins (C12, 60% chlorine), a material widely used as a flame retardant and extreme-pressure lubricant, were conducted in male and female F344/N rats and male and female B6C3F1 mice in single-administration, 16-day, 13-week, and 2-year
Assessment of the carcinogenic potential of chlorinated water: experimental studies of chlorine, chloramine, and trihalomethanes.
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BACKGROUND
Water chlorination has been one of the major disease prevention treatments of this century. While epidemiologic studies suggest an association between cancer in humans and consumption of chlorination byproducts in drinking water, these studies have not been adequate to draw definite
Effects of food composition on the inactivation of foodborne microorganisms by chlorine dioxide.
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Chlorine dioxide (ClO2) is a strong oxidizing agent that can be applied in solution as well as in the gaseous state. It has bactericidal, fungicidal and viricidal properties. Several food-related microorganisms, including Gram-negative and Gram-positive bacteria, yeasts, mould spores and Bacillus
Early response to salt ions in maize (Zea mays L.).
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Abscisic acid (ABA) regulates leaf growth and transpiration rate of plants exposed to salt stress. Despite the known fact that cell dehydration is instrumental for the modulation of ABA concentrations when NaCl is high in the external environment, it was never tested as to whether sodium (Na) or
Biological responses of maize (Zea mays) plants exposed to chlorobenzenes. Case study of monochloro-, 1,4-dichloro- and 1,2,4-trichloro-benzenes.
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A 7-day-exposure time experiment was designed to investigate the phytotoxicity of chlorobenzenes (CBs) on Zea mays seedlings, focusing on the growth and generation of oxidative stress. Significant growth inhibition (based on biomass gain) was observed for exposure to monochlorobenzene (MCB),
In vivo biosynthesis and spatial distribution of Ag nanoparticles in maize (Zea mays L.).
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Nanoparticles (NPs), especially biosynthesised in living plants by absorbing soluble salts and reducing metal ions, are extensively used in various fields. This work aimed at investigating the in vivo biosynthesis of silver NPs (Ag-NPs) in maize and the spatial distribution of the NPs and some
Developmental effects of trichloroacetonitrile administered in corn oil to pregnant Long-Evans rats.
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Trichloroacetonitrile (TCAN) is a by-product of the chlorine disinfection of water containing natural organic material. When administered by gavage to pregnant Long-Evans rats in a medium-chain triglyceride vehicle, tricaprylin oil (Tricap), at a volume of 10 ml/kg, TCAN induced fetal cardiovascular
Toxicology studies of bromodichloromethane (CAS No. 75-27-4) in genetically modified (FVB Tg.AC Hemizygous) mice (dermal, drinking water, and gavage studies) and carcinogenicity studies of bromodichloromethane in genetically modified [B6.129-Trp53(tm1Brd) (N5) haploinsufficient] mice (drinking water and gavage studies).
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Bromodichloromethane is a by-product of the chlorination of drinking water. It is formed by the halogen substitution and oxidation reactions of chlorine and naturally occurring organic matter (e.g., humic or fluvic acids) in water containing bromide. Bromodichloromethane was nominated to the NTP by
Comparative toxicity of four chlorinated dibenzo-p-dioxins (CDDs) and their mixture. Part I: Acute toxicity and toxic equivalency factors (TEFs).
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There is presently no scientifically proven method to assess the toxicity of environmental samples containing complex mixtures of chlorinated dibenzo-p-dioxins (CDDs) of known composition. Their risk assessment is currently based on the interim concept of toxicity equivalency factors (TEFs), with
Congener-specific distribution of polychlorinated biphenyls in brain regions, blood, liver, and fat of adult rats following repeated exposure to Aroclor 1254.
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Our previous in vitro studies with both isolated organelles and primary neuronal cell cultures found that intracellular signal transduction can be perturbed by some noncoplanar PCBs at exposure levels of
NTP Renal Toxicity Studies of Selected Halogenated Ethanes Administered by Gavage to F344/N Rats.
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The National Cancer Institute and National Toxicology Program have performed 2-year toxicology and carcinogenesis studies with a number of ethanes substituted with chlorine or bromine. A review of the results of studies with these halogenated ethanes has revealed several consistencies between the
NTP Toxicology and carcinogenesis studies of bromodichloromethane (CAS No. 75-27-4) in male F344/N rats and female B6C3F1 mice (Drinking Water Studies).
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Bromodichloromethane is a by-product of the chlorination of drinking water. It is formed by the halogen substitution and oxidation reactions of chlorine with naturally occurring organic matter (e.g., humic or fulvic acids) in water containing bromide. Bromodichloromethane has been shown to be
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