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Showing 1 to 20 of 45 for “"selenium (Se)"”.
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Impact of high intensity interval training (HIIT) and/or selenium (Se) supplementation on oxidative stress and antioxidant status in active females.
… oxygen species (ROS) as part of metabolic processes. These free radicals are neutralized by an elaborate antioxidant defence system consisting of enzymes. An imbalance between ROS / FR and antioxidants is often referred to as oxidative stress and is involved in the pathogenesis of various …
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Dietary Effects of Selenium During Reproduction in the Rat (Lactation, Milk, Pregnancy, Bioavailability, Glutathione Peroxidase)
The National Research Council (NRC) has recommended a dietary selenium (Se) concentration of 0.1 ppm for the laboratory rat. This dietary level produced maximal liver glutathione peroxidase (GSH-Px) activity in growing male rats. Similar studies were not performed in female rats during growth or …
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Persistent photoconductivity and deep levels in aluminum gallium indium phosphide
… Al\sb{x}Ga\sb{1-x})\sb{y}In\sb{1-y}P$) is used in the fabrication of visible lasers and light emitting diodes. There are problems in this material related to the observation of persistent photoconductivity at certain compositions. In this thesis the persistent photoconductivity and related …
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Multigenerational effects of selenium in rainbow trout, brook trout, and cutthroat trout
Selenium (Se) is an essential element, toxic at concentrations only slightly above those required. It can become detrimental to fish health when available in excess in the aquatic environment. This study examined the effects of Se on adult female rainbow trout, brook trout, and cutthroat trout fed …
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Selenium Contamination: The Environmental Effectiveness of Current Treatment Methods in the Mining Industry Based on Water Quality Guidelines
Selenium (Se) contamination in water bodies and ecosystems presents challenges to the environment, including wild species, and human communities. The Elk Valley region in British Columbia (BC), Canada, exemplifies these challenges. This research examines the effectiveness of Teck's Saturated Rock …
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Dosage Window of Selenium on Human Natural Killer Cytotoxicity and Neutrophilmediated Chemiluminescence
… have been conducted on the effect of in vitro selenium (Se) supplementation on cellular immunity. In the present study, the effects of in vitro incubation with sodium selenite on natural killer (NK)-mediated cytotoxicity and phagocyte chemiluminescence (CL) were examined. NK-mediated …
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Interplay between selenium hyperaccumulator plants and their microbiome
… or inside plants (endosphere). Many of these microbes benefit their host by promoting growth, helping acquire nutrients or by alleviating biotic or abiotic stress. In addition to its intellectual merit, better knowledge of plant-microbiome interactions is important for agriculture and …
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Selenium Dynamics in Headwater Streams of the Central Appalachian Coalfields: An Investigation of Enrichment and Bioaccumulation
Surface coal-mining is a source of selenium (Se) contamination in streams of the Appalachian coalfields. Selenium dynamics in aquatic systems are complex and largely controlled by site-specific factors, but have been understudied in Appalachian headwater streams. In this study, we evaluated the …
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Avaliação do status nutricional de selênio em gestantes de uma maternidade de referência da Bahia, Brasil
Selenium (Se) is an essential micronutrient for human health, as it is constituted as selenoproteins that have an antioxidant role and participate in the biosynthesis and activation of thyroid hormones. Selenium deficiency (SeD) during pregnancy is common and increases the risk of complications for …
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Investigating best management practices to reduce selenium and nitrate contamination in a regional scale irrigated agricultural groundwater system: Lower Arkansas River Valley, southeastern Colorado
… groundwater tables, and a high concentration of selenium (Se, both within the alluvial aquifer system and within the Arkansas River and its tributaries). Se originates primarily from bedrock and outcropped marine shale, released due to chemical oxidation in the presence of dissolved oxygen and …
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Modeling and fault detection of an industrial copper electrowinning process
… of copper from the leaching solution. The presence selenium (Se) and tellurium (Te) in copper sulphide minerals may result in contamination of the leach solution and, eventually of the copper cathode. Unfortunately, hydrometallurgical processes are often difficult to monitor and control due to …
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Sediment toxicity and bioaccumulation of toxicants in the zebra mussel, Dreissena polymorpha, at Times Beach, Buffalo, New York
… by a biomonitoring study utilizing the zebra mussel, <i>Dreissena polymorpha</i>, at the Times Beach Confined Disposal Facility (CDF), located in Buffalo, New York. Concentrations of the selected contaminants (polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and the …
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The selenium recycling enzyme selenocysteine lyase: regulation and physiological role in glucose and lipid metabolism
Selenium (Se) is an essential trace element used for biosynthesis of selenoproteins, acquired either through the diet or cellular recycling mechanisms involving the enzyme selenocysteine lyase (Scly). This dissertation characterizes the Sedependent regulation of Scly gene expression in in vitro and …
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Exploring combined effects of arsenic and selenium exposure on larval zebrafish (Danio rerio)
Arsenic contamination in aquatic ecosystems is a major environmental concern, with arsenite (As³⁺) being highly toxic. Selenium (Se) helps mitigate oxidative stress and hence could reduce the toxic effects of arsenic. However, Se can also be toxic at high concentrations. Given that these metalloids …
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Effects of Stress on Several Immune and Health Responses of Weanling Calves
The effects of weaning stressors on several immune and health responses were measured in three experiments. Sixty-four beef calves from 2 sources were bled on d - 7 (pre-weaning), 0 (weaning), 7, 14, and 21 (post-weaning). Serum selenium (Se), neutrophil and lymphocyte counts, and glutathione …
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Growth Performance, Carcass Traits, and Reproductive Characteristics in Boars Fed Diets Supplemented With an Organic Source of Selenium
The objectives of this study were to assess growth and reproductive performance of boars fed a diet supplemented with organic selenium (Se). Crossbred boars received one of three treatments: I. basal diet with no supplemental Se, II. basal diet supplemented with 0.3 ppm organic Se (Sel-Plex), and, …
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Selenium supplementation and selected immune responses of beef cattle
The effect of selenium (Se) supplementation, by ad libitum salt-mineral mixture (SMM) and/or Se injection, on bovine immune response was evaluated in three experiments. Sixty weaned beef calves, with marginal blood Se (67 μg Se/1), were allotted to one of six Se treatment groups in a 70-day …
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Effects of Antioxidant Supplementation with Vitamin E and Selenium on Cytokine Production in Mice Infected with Trypanosoma Cruzi
… with the antioxidants vitamin E and selenium (Se) has been shown to be beneficial against the intracellular parasite Trypanosoma cruzi during experimental Chagas' disease. Supplementation of mice with vitamin E and selenium at levels well above the recommended daily allowance for …
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Exfoliation, Synthesis, and Characterization of Nanoscale Te
… more attention and emphasis in academic research than nanowires, but the latter are an important area of study for creating 1D materials, or single atom chains, the next generation materials for advancing electronic devices. Atomically thin layers can be generated from 2D materials with …
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Lycopene, Selenium, Vitamin E and Prostate Cancer
… suggest that tomato and lycopene consumption and serum lycopene concentrations are inversely related to prostate cancer occurrence. The oldest, and possibly most cited potential mechanism of action, is that lycopene increases gap junction communication by increasing connexin 43 (Cx43) levels. To …
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