Tissue-specific modification of selenium concentration by ...
Selenium concentration and activity of selenium-dependent glutathione peroxidase (EC 1.11.1.9; SeGPx) in the liver after I or 3 weeks of treatment with dexamethasone (DEX) in the drinking water* (Mean values and standard deviations) Cytosolic Whole tissue Se Cytosolic Se SeGPx (pmol/kg tissue) (pmol/kg tissue) (U/mg protein) DEX dose (mg/l) n ...
Selenium in biology - Wikipedia
Selenium has bimodal biological action depending on the concentration. At low nutritional doses, selenium acts as an antioxidant through selenoproteins, scavenging ROS, supporting cell survival and growth; while, at supra-nutritional higher pharmacological doses, selenium acts as a pro-oxidant generating ROS and inducing cell death.In cancer, studies have been conducted mostly on the …
Selenium Supplements: Too Much of a Good Thing? - ABC News
But men and women in the U.S., where 50 percent of the population takes supplements, get an average 134 and 93 micrograms per day, respectively. ... "The effects of selenium …
Brazil nuts: an effective way to improve selenium status ...
Plasma selenium concentration. At 12 wk the estimated mean (95% CI) percentage changes in plasma selenium concentrations were 64.2% (54.5%, 73.8%) in the Brazil nut group and 61.0% (51.3%, 70.7%) in the selenomethionine group compared with 7.6% (−1.7%, 16.8%) in the placebo group, an increase of 58.0, 59.3, and 6.7 μg Se/L, in the 3 groups, respectively.
Effect of selenium supplementation on semen ...
There was no statistical difference between treatment groups in relation to volume, mass moviment, total motility, vigour, concentration, plasma and acrosomal membrane integrity (p > .05). Sperm morphology was different between treatment groups, the G1 (0 mg of selenium) had the highest percentage of major defects (11.11 ± 1.11 a; p < .05). It ...
Synthesis, characterization, and anti-tumor properties of ...
2.3.Determination of selenium concentration. The selenium concentration was measured by using an Optima 8300 ICP-OES (PerkinElmer Co., USA) according to the method described previously with minor modifications .First, 30 mg of each sample was digested with a mixture of HClO 4 and HNO 3 (1:9, v/v). Thereafter, the digested solution was reconstituted to 25 mL of distilled water and used directly ...
An Investigation of the Selenium Concentration in ...
response and selenium concentration, the selenium concentrations in the remaining samples were calculated. Selenium in the efflorescences ranged from less than one part per million to 441 ppm (by weight). ... Thirty-nine percent of the samples were between 0.5 ppm and 5 ppm. Twenty-five percent …
High serum selenium levels are associated with increased ...
Q1: N=213, serum selenium concentration <71.4 µg/L; Q2: N=211, serum selenium concentration=71.4–86.7 µg/L; Q3: N=212, serum selenium concentration=86.8–104.5 µg/L; Q4: N=211, serum selenium concentration >104.5 µg/L. The LS means of (A) to (F) increased with the increments of serum selenium (p for trend<0.001).
Aquatic Life Ambient Water Quality Criterion for Selenium ...
3.1 Chronic Tissue-Based Selenium Criterion Element Concentration ..... 34 3.1.1 Acceptable Studies of Fish Reproductive Effects for the Four Most Sensitive ... Illustration of Intermittent Spike Exposure Occurring for a Certain Percentage of Time (e.g., 10%) Over a 30-Day Period, and Background Exposure Occurring for the
Selenium in Soils and Plants - NWISRL Publications
Selenium In Soil The concentration of selenium in most soils lies within the range of 0.1 to 2 ppm; how-ever, high concentrations up to 1200 ppm total and 38 ppm selenium as water-soluble selenate hove been reported in seleniferous areas of the world." Soils developed from the cretaceous shale of South Dakota, Mon-tana, Wyoming, Nebraska ...
Appendix 6D Selenium Model Documentation
Dissolved selenium concentration is assumed to be 0.1 µg/L due to lack of available data and lack of sources that would be expected to result in concentrations greater than 0.1 µg/L. c.
Appendix G - Attachment 2 Appendix G2 Selenium Model ...
Tract] × 0.23 µg/L [selenium concentration at Sacramento River below Knights Landing]) + (5.06 [% inflow from Delta Agriculture water source at Franks Tract] × 0.11 µg/L [selenium concentration at Mildred Island, Center])/100 = 0.19 µg/L The quarterly and average annual water column selenium concentrations for the DSM2 output locations
Chapter 15. Selenium
Approximately 30 percent of tissue selenium is contained in the liver, 15 percent in kidney, 30 percent in muscle, and 10 percent in blood plasma. Much of tissue selenium is found in proteins as seleno-analogues of sulphur amino acids; other metabolically active forms include selenotrisulphides and other acid-labile selenium compounds.
Assessment of Dissolved-Selenium Concentrations and Loads ...
selenium concentration in the Gunnison and Colorado Rivers (Bureau of Reclamation, 2011). Selenium is a trace element that bioaccumulates in aquatic food chains and can cause reproductive failure, deformities, and other harmful effects (Hamilton, 1998; Lemly, 2002). The primary goal of the Selenium Management Program (SMP), as recommended in
Effects of selenium source on measures of selenium status ...
Lymphocytes blastogenesis (mean ± SE) in response to 2 concentrations of Con A at study start, 1 and 3 mo after dietary assignment, in adult horses (n = 5 per group) receiving supplementary inorganic selenium (0.3 ppm DM, as sodium selenite), organic selenium (0.3 ppm DM, as Se yeast), or receiving no supplementary selenium (< 0.05 ppm DM)
Response of selenium concentrations in groundwater to ...
Total selenium concentrations in monitoring wells located farther from the canal were not directly affected by canal leakage. Selenite/total selenium mass ratios in the East Canal samples ranged from about 0.02 to 0.13, indicating that about 2 to 13 percent of the total selenium in canal samples was composed of selenite.
Organic Selenium for Horses | Horse Supplements
In grains or complete feeds, selenium will be listed in parts per million (PPM). PPM is a measure of concentration just like percent. It is convenient when there is only a small amount present. Percent is 1 part per one hundred. PPM is 1 part per million. The table below will allow you to figure out how much selenium you are providing. Find the ...
Circulating Selenium Concentration Is Inversely Associated ...
Circulating Selenium Concentration Is Inversely Associated With the Prevalence of Stroke: Results From the Canadian Health Measures Survey and the National Health and Nutrition Examination Survey Xue Feng Hu, PhD, 1 Saverio Stranges, MD, PhD, 2, …
Selenium concentration in wheat grain: Is there sufficient ...
12%Selenium (Se) is an essential micronutrient for humans and animals, with antioxidant, anti-cancer and anti-viral effects, and wheat is an important dietary source of this element. In this study, surveys of Se concentration in grain of ancestral and wild relatives of wheat, wheat landrace accessions, populations, and commercial cultivars grown in Mexico and Australia were conducted. …
The association between serum selenium concentration and ...
Serum Se concentration and all-cause mortality. There were 26 (25.5%) all-cause mortality events occurred in patients with HF in the 1st quartile serum Se concentration, 26 (25.2%) events in the 2nd quartile, 27 (26.5%) events in the 3rd quartile, and …
Selenium - Dietary Reference Intakes for Vitamin C ...
In rats, 25 percent of total body selenium is present in this pool (Behne and Wolters, 1983). ... Using the average selenium concentration of milk of well-nourished but unsupplemented mothers, 18 µg (0.23 µmol)/L, the AI for infants 0 through 6 months of age would be 18 µg/L × 0.78 L/day = 14 µg/day, rounded up to 15 µg (0.19 µmol)/day. ...
Molecules | Free Full-Text | Elemental Selenium Enriched ...
The presence of selenium nanopowder distributed beads on the outside and inside of the fiber. Increasing the concentration of selenium nanopowder has increased the formation of beads. When selenium nanoparticles are synthesized in the PVB solution, then the selenium nanoparticles are inside the fiber, the size is much smaller than 50 nm.
Antitumor Potential of Selenium Nanoparticles (SeNPs ...
Multiple myeloma is defined as bone marrow contains higher level of plasma cells, and well-known malignant tumour of B lymphocytes. Recently, nanoparticles have been synthesised and applied in the field of biomedicine. RPMI8226 cells were treated with selenium nanoparticles (SeNPs) at various concentrations for 48 h. Cell viability, reactive oxygen species (ROS), cell morphology, ATP …
Effect of Selenium Fertilization on Dry Weight ...
Se4) respectively, with a percentage increase (4.06%, 5.21%, 6.76%) and (2.90%, 6.27%, 6.51%) on a comparison treatment of the Qurna and marshes soils ... increasing the concentration of selenium ...
Appendix 8M 2 Selenium
= quarterly average selenium concentration in water (micrograms/liter . 9 [µg/L]) at a DSM2 output location . 10 . I. 1-6 = modeled quarterly inflow from each of the six sources of water to the Delta for . 11 . each DSM2 output location (percentage) 12 . C. 1-6 = selenium concentration in water (µg/L) from each of the six inflow sources to ...
3 DISTRIBUTION | Selenium in Nutrition,: Revised Edition ...
Relative to selenium in sodium selenite (100 percent), the effectiveness of selenium in fish meals was 32 to 60 percent, in soybean meal was 18 percent, and in corn gluten meal was 26 percent for restoration of serum gluathione peroxidase activity in selenium-depleted chicks.
Selenium in Drinking-water - World Health Organization
Selenium (Se) is present in the earth's crust, often in association with sulfur-containing minerals. It is normally found in concentrations of 50–90 µg/kg, but higher concentrations can be associated with some volcanic, sedimentary and carbonate rocks. Selenium concentrations in soils vary widely, from 5 to 1 200 000 µg/kg, being
Top 15 Selenium Foods, Nutrition Data and Recipes - Dr. Axe
1 kernel (5 grams): 95.9 micrograms (over 100 percent DV) Brazil nuts' selenium content is amazing, isn't it? When it comes to selenium foods for vegetarians and selenium foods vegan can eat, Brazil nuts are without a doubt a top choice. It only takes one or two nuts (depending on their size) a day to meet most people's daily needs.
Peanut selenium distribution, concentration, speciation ...
That is, the percentage of organic Se accounted for the total Se content decreased with the increase of Se fertilizer concentration within the range of 50 to 100 g Se/ha, approximately 88.2% of Se absorbed by plants was stored in the organic form at the lowest applying concentration of …
Racial Differences in Serum Selenium Concentration ...
Serum selenium concentration was measured in 18,292 participants aged 12 years or older. Racial/ethnic groups other than non-Hispanic Blacks and non-Hispanic Whites (hereafter referred to as "Blacks" and "Whites") were excluded, leaving 12,321 participants. ... (56 percent) than of Whites (36 percent) had serum selenium concentrations ...