Topic
Selenium
About: Selenium is a research topic. Over the lifetime, 21192 publications have been published within this topic receiving 429715 citations. The topic is also known as: Se & selen.
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TL;DR: References published since 1960 that report analyses of selenium in foods were collected and evaluated according to criteria in five categories: number of samples, analytical method, sample handling, sampling plan, and analytical quality control.
Abstract: References published since 1960 that report analyses of selenium in foods were collected and evaluated according to criteria in five categories: number of samples, analytical method, sample handling, sampling plan, and analytical quality control. Data were grouped by food item and rated according to the criteria that had been developed specifically for evaluating the quality of selenium data. Ratings assigned to the data from each study yielded a Quality Index, indicating which data would be included in the calculation of the mean selenium value for each food item. The Quality Indexes for acceptable studies were summed to determine a Confidence Code, intended to indicate the relative degree of confidence the user can have in each mean selenium value. The selection of selenium core foods was based on their selenium concentration and frequency of consumption. Foods were ranked by multiplying selenium concentration by the amount consumed by the 36,255 individuals who provided 3-day dietary intake data in the U.S. Department of Agriculture's 1977-78 Nationwide Food Consumption Survey. Mean, minimum, and maximum selenium values, Confidence Codes, ranks, and references have been compiled for 114 food items. The five most highly ranked food aggregates (beef, white bread, pork, chicken, and eggs) provided half of the selenium accounted for in the diets of the survey respondents.
107 citations
107 citations
TL;DR: Evidence is provided that care should be taken about high intake of dietary fat containing arachidonic acid or its precursor fatty acids when selenium is used for the management of prostate cancer, and that a combination of seenium and 5-lipoxygenase inhibitors may be a more effective regimen for prostate cancer control.
107 citations
TL;DR: Novel insights into Se response in rice at the proteome level are provided, which are expected to be highly useful for dissecting the Se response pathways in higher plants and for producing Se enriched rice cultivars in the future.
107 citations
TL;DR: In this paper, the principal selenium compounds in these samples were identified as selenomethionine, and Se-adenosyl-selenohomocysteine in yeast, and γ-glutamyl-Se-methyl-SEN-EN in garlic.
Abstract: Selenium-enriched garlic and yeast sample extracts and digests were analyzed using ion-pair high performance liquid chromatography (HPLC) with on-line inductively coupled plasma-mass spectrometric (ICP-MS) and electrospray ionization-mass spectrometric (ESI-MS) detection. The principal selenium compounds in these samples were identified as selenomethionine, and Se-adenosyl-selenohomocysteine in yeast, and γ-glutamyl-Se-methyl-selenocysteine and possibly γ-glutamyl-selenomethionine in garlic. The compounds identified account for 85 and 90% of the total selenium content of the yeast and the garlic samples, respectively. On-line HPLC-ESI-MS selected ion chromatograms (SIC) and mass spectra of selenium compounds extracted from selenium enriched samples are presented. Limits of quantification (LOQ, defined as S/N = 10) for HPLC-ICP-MS were in the range 10–50 ng mL–1 Se in the injected extracts. LOQ values for HPLC-ESI-MS were ca. 100 times higher than those of HPLC-ICP-MS.
107 citations