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Increasing the stable selenite concentration slightly reduced the percentage of [75Se]selenite transferred from the intestinal lumen to the body, while the transport of [75Se]selenomethionine was not similarly affected by the carrier concentration. Selenomethionine was more rapidly removed from the ligated intestinal segment and more ...
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The effect of different carbon sources and initial selenite concentration on fungal growth, pellet formation and selenite removal was first examined in a batch system. The fungal strain showed a maximum selenite removal efficiency of 86% in the batch system. Analysis of the fungal pellets by field-emission scanning electron microscopy, field ...
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The kinetics of cerium selenite precipitation were determined within a magnetically stirred solution of 5.6 mM selenite . 3+ stock solution added for with volumes of the Ce cerium:selenite concentration ratios of 2:1 and 8:1. At selected time points (0, 0.25, 0.5, 1, 2, 6, and 24 h), 5 mL suspension samples were removed, centrifuged, ltered ...
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The selenite protective film form on AZ31 upon exposure to selenite-bearing bath provides an approximate 5 times increment of corrosion resistance compared with control. A robust and apparently protective hydrated gel film was observed in SEM images collected after coating.
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These strains were found to be resistant to selenite at (300-600 mM) concentrations. In the present study we have characterized some physiological adaptations of strains Enterobacter sp. AR-4, Bacillus sp. AR-6 and Delftia tsuruhatensis AR-7 during exposure to higher concentration of selenite under aerobic and anaerobic environments.
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Buy 10mm Natural Gemstone Beads Bracelet Powerful Selenite Healing Crystal Energy Stone Concentration Spirituality Handmade Fashion Jewelry Gift for Women-Blue and other Stretch at Amazon. Our wide selection is elegible for free shipping and free returns. ... exclusive deals, and award-winning movies & TV shows with Prime Try Prime and ...
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During these characterizations, a black or red film formed on substrates after immersion tests. A red film was observed at high selenite concentrations, and some trapped transparent crystals were also noted. Several repeat experiments indicated that after three days immersion, nearly all samples were free of obvious corrosion defects.
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The concentrations of selenium in groundwater and surface water generally ranged from <1 μg L −1 to 0.4 mg L −1 (Gore et al., 2010), and an extremely high concentration of 6 mg L −1 has also been reported in some special areas (Cannon, 1964). But the occurrence of selenium at high concentrations in natural environments may increase the ...
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The morphologies of films formed on AZ31 upon exposure to aqueous selenite were concentration-dependent. Films formed at a low concentration (1.0 mM) were uniform and continuous, whereas the film formed in higher concentrations (10.0 and 50.0 mM) were less uniform and contained cracks and gaps, which increased as bath concentration increased.
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The determination of the Selenium - content is done by reaction of the Selenite with Potassium iodide and titration with Sodium thiosulfate solution 0.1 mol/l. This determination is not always …
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Selenite sorption was shown to be nonlinear and slightly increasing with the C–S–H Ca/Si ratio; precipitation of CaSeO 3 (s) was observed for Se concentration higher than 2 × 10 –3 M. …
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Duckweed plants were cultivated in controlled conditions for 7 weeks in different concentrations of Na selenite: 0.5, 1, 2, 5 (exposed 42 days) and 10 mg Se L(-1) (survived 7-21 days). The addition of 1 mg Se L(-1) did not negatively affect photochemical efficiency whilst respiratory potential increased in weeks 2-4 compared to control. The ...
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Despite preemptive high-dose sodium-selenite administration, cardiac surgical patients experienced a significant decrease in circulating selenium levels on the first postoperative day. ... Selenium blood concentrations in patients undergoing elective cardiac surgery and receiving perioperative sodium selenite Nutrition. 2013 Jan;29(1):158-65 ...
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We examined sorbed selenate and selenite by in situ attenuated total reflectance Fourier transform infra-red (ATR-FTIR) spectroscopy, diffuse reflectance infrared Fourier transform …
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Silica gel modified with 3-mercaptopropyl-trimethoxysilane was used for the selective separation and pre-concentration of selenite (Se(IV)) from aqueous solutions containing Se(IV) and selenate (Se(VI)). Over a wide range of acidity, from 2 mol l(-1) HCl to pH 9.00, Se(IV) was taken up by the mercap …
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The follicular diameter (μm) of cultured preantral follicles in serum-free and serum supplemented media containing different concentrations of sodium selenite (ng/ml). a there was significant difference with other groups (P < 0.001). BSA Bovine serum albumin, FBS fetal bovine serum, SS sodium selenite. The day on the figure showed duration ...
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The selenite coating from a higher concentration (5 mM and 10 mM) selenite decreases the likelihood of surface film breakdown. The protection mechanism of selenite coating was the interface reaction between Mg and …
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All reagents used were of analytical reagent grade. Double distilled water from Equitron's instrument was used throughout the work. Variamine blue (p-amino-p'-methoxydiphenylamine) was purchased from Merck. Al-336 (Tri-octylmethyl ammonium chloride) was purchased from Sigma Aldrich. Sodium selenite, hydro…See more on jast-journal.springeropen
Sorption of selenite was pH independent in the pH range of 2–6, while sorption of selenate decreased at pH 5 and 6. The addition of Cl − had no significant effect on selenite or …
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The mean concentrations of Se in whole blood from calves in the yeast and selenite groups were 130 and 84 microg/L, respectively, and plasma concentrations were 48 and 34 microg/ L, respectively. Mean Se concentration in the milk from the yeast group (17.3 microg/L) was higher than that in milk from the selenite group (12.7 microg/L).
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The developed analytical procedure can accurately and reproducibly measure Se(IV) concentrations down to 1 mg/L. For concentrations above 20 mg/L dilution is necessary. …
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Considering the origin of this strain (isolated from a spring with elevated concentrations of sulfur compounds) and some of its metabolic features [17], in this work we also performed similar experiments in the presence of both selenite (1 mM) and an elevated concentration of sulfate (7 mM) in order to verify the possibility of the formation of ...
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Microalgae are able to metabolize inorganic selenium (Se) to organic forms (e.g. Se-proteins); nevertheless at certain Se concentration culture growth is inhibited. The aim of this work was to …
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Based on these results, we conclude that selenite concentrations and culture time influenced the extracellular and intracellular metabolite profiles of Epichloë sp. from F. sinensis . +6
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The range between Se deficiency and toxic doses is very narrow (Yin et al., 2019), so it is particularly important to determine the optimal content of Se in plants.This is not only dependent on the application concentration but also related to plant species, the ability of plants to accumulate Se, types of supplements (such as selenite, selenate, Se yeast), application stage, …
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In this study, we demonstrated that sodium selenite with high doses (> or = 10(-3) M) were potent in inducing a contracture type effect on heart and smooth muscles. Selenite (Se), at a concentration of 10(-3) M, caused a contracture effect in heart preparations. Also, low Se concentrations did no …
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The effect of annealing and different molar concentrations on the structural and optical properties of zinc selenite thin films $$(text{ZnSe})$$ were studied, as they were …
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Methods Rice plants were treated with different concentrations (0, 0.01, 0.1, 0.5, 1 and 5 μg/mL) of sodium selenite in a real paddy field in Qingzhen, Guizhou, China.
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The morphologies of films formed on AZ31 upon exposure to aqueous selenite were concentration-dependent. Films formed at a low concentration (1.0 mM) were uniform and continuous, whereas the film formed …
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All selenoproteins (SH, SM, SL) groups significantly enhanced the T-AOC, but sodium selenite (IH, IM, IL) did not improve the T-AOC substantially compared to the model group. The T-AOC of medium and low sodium selenite groups was slightly higher than the model group. The T-AOC of sodium selenite groups was much lower than the selenoproteins groups.
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This study aimed to compare nano-selenium (Nano-Se) and sodium selenite supplements for dairy cows on lactation performance, milk Se levels and selenoprotein (Sel) gene expression. ... Gene Expression Profiles and Milk Selenium Concentration in Lactating Dairy Cows Biol Trace Elem Res. 2021 Jan;199(1):113-119. doi: 10.1007/s12011-020-02139-2. ...
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A red film was observed at high selenite concentrations, and some trapped transparent crystals were also noted. Several repeat experiments indicated that after three days immersion, nearly all ...
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By varying the concentration of sodium selenite from 100 μg/m to 1000 μg/mL, we were able to form nanoparticles of different sizes. Using electron microscopy, we determined the size distribution of the nanoparticles over a 6-day period. We found that nanoparticle diameters varied (60–130 nm) as a function of the sodium selenite concentration.
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selenite Se at the same dietary concentration. Wool Se concentrations in the present study were more than ten-fold higher than concentrations of 2 to 2.5 mg/kg in wool from wethers fed up to 10 mg/kg dietary Se as selenite (Cristaldi et al., 2004), but never exceeded 40 mg/kg which is less than 45 mg/kg which was
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