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كسارة مخروطية سلسلة HCS
Effect of sodium selenite concentration and culture time on
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
selenite film concentration
Selenite induced p53 Ser 15 phosphorylation and caspase ·The results showed that exposure of LNCaP cells for 24 hours to lower micromolar concentrations of selenite led to DNA laddering and to the cleavage of PARP and several pro caspases Ser 392 was not detectable within the X ray film exposure duration used for enhanced chemiluminescence ∼1 hour These results indicated …
Effects of selenate and selenite on selenium accumulation …
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, …
Selective pre-concentration of selenite from aqueous …
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 …
Fabrication of (ZnSe) thin films and study of their optical and
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 …
Selenium blood concentrations in patients undergoing …
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 ...
Corrosion Protective Film Formation on Mg …
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 …
Removal of Selenium by Reduction to Selenite and …
Veolia Water Technologies Canada has developed the TracerTM Se process (patent pending), which is a new method for selenium removal based on biological reduction of selenium to …
Effects of magnetic field on selenite removal by sulfidated …
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 ...
Effects of dietary Selenomethionine supplementation on …
They pointed out that serum Se concentrations increased (P < 0.01) as the dietary level of Se increased. Serum Se was somewhat higher at the 0.05 mg/kg supplemental Se level when sodium selenite was the Se source, but, as the dietary Se level increased, serum Se concentrations were higher when organic Se source was provided.
Intestinal absorption of 75Se-labeled sodium selenite and
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 ...
DIVISION S-2—SOIL CHEMISTRY
We examined sorbed selenate and selenite by in situ attenuated total reflectance Fourier transform infra-red (ATR-FTIR) spectroscopy, diffuse reflectance infrared Fourier transform …
Corrosion Inhibition of Mg Alloy AZ31 By Selenite (SeO32-)
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 ...
Tissue and concentration-dependent effects of sodium selenite …
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 …
Determination of Selenite SeO 2- 3
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 …
Selenium Silk Nanostructured Films with Antifungal and …
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.
Selenite Films
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Corrosion Inhibition of AZ31 Mg Alloy by …
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 …
The synergistic effect of Selenium (selenite, -SeO3(2-)) dose …
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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Corrosion Protective Film Formation on Mg Alloy AZ31 by …
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.
Selenite Retention and Cation Coadsorption Effects under …
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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Physiological adaptations and tolerance towards higher concentration of
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.
Response of duckweed to various concentrations of selenite
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 ...
The concentration of selenium matters: a field study on …
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.
The protective effect and mechanism of selenium-rich rice …
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.
An optical sensor for selenite determination in aqueous …
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 kinetic study of selenite and selenate onto a high …
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 …
Effects of pH and biomass concentrations in the removal of selenite …
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 ...
Comparing Tolerance of Selenium (Se) as Sodium …
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
Corrosion Inhibition of AZ31 Mg Alloy by Aqueous Selenite …
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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Nano-selenium Supplementation Increases Selenoprotein (Sel…
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. ...
COLORFUL BLING Natural Powerful Selenite Beads Bracelet …
【Materials】 These bracelets are made of natural selenite beads. No metal, no dyeing. Very friendly and comfortably to your skin. 【Size】 Natural selenite beads with three sizes, approx.8mm,10mm, 12mm beads, bracelet length is approx. 7.48-8.18 inches. 【Efficacy】 Cleansing and increasing the ability of the endocrine glands of the ...
The rapid measurement and monitoring of selenite …
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. …
Corrosion Inhibition of Mg Alloy AZ31 By Selenite (SeO32-)
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.
The effects of different concentrations of sodium selenite …
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 ...
The influence of dietary selenium as selenium yeast or sodium selenite …
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).
