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Journal articles on the topic 'Selenium – Analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 January 2023

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1

Bódi, Éva, Dávid Andrási, and Béla Kovács. "Selenium speciation analysis of selenium-enriched food sprouts." Acta Agraria Debreceniensis, no. 56 (March 11, 2014): 23–28. http://dx.doi.org/10.34101/actaagrar/56/1927.

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In this present study, we prepared selenium-enriched pea and wheat sprouts. During our research we aimed not only to measure the total selenium content of the sprouts but to identify different selenium species. Scientifical researches show why the analytical examination of different selenium (Se) species is necessary: consumption of all kind of Se-species is useful for a person who suffers in selenium deficit, while there is significant difference between effects of different Se-species on person, in whose body the Se-level is just satisfactory. Biological availability, capitalization, a

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2

Müller-Simon, Hayo, and Peter Griebenow. "Behavior of Zinc Selenite, Calcium Selenite and Metallic Selenium as Decolorizing Agents in Flint Glass Production." Advanced Materials Research 39-40 (April 2008): 541–46. http://dx.doi.org/10.4028/www.scientific.net/amr.39-40.541.

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Zinc selenite, calcium selenite and metallic selenium have been consecutively introduced as decolorizing agents in a flint glass production. The selenium concentration in the glass has been measured by wet-chemical analysis, optically by the evaluation of the cielab a-value and electrochemically by means of a voltammetric sensor. All measuring techniques showed the highest selenium retention for calcium selenite followed by zinc selenite and the least retention using metallic selenium. The best reproducibility is achieved using zinc selenite while both calcium selenite and metallic selenium pr

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3

Wu, Yun, Li Ding, Su Ping Li, Ze Zhang, and Yu Lian Wu. "The Analysis of Selenoprotein and Se-Polysaccharide in Selenium-Enriched Lentinan edodes." Advanced Materials Research 524-527 (May 2012): 2325–29. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.2325.

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The cultivation of Lentinan edodes as a carrier for Se, low concentrations of sodium selenite solution were added directly to the medium to inorganic selenium be absorbed into the mushroom body, and selenium-enriched Lentinan edodes can be got. Using selenium-enriched mushrooms as raw material, it was preliminarily studied that patterns of occurrence of selenium and the contents of Selenoprotein and Se-polysaccharide in their fruiting bodies of mushrooms. Various extraction solvents were used to distill and separation Se-polysaccharide and Se-protein of the Lentinan edodes, and atomic absorpti

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4

Nogara, Pablo Andrei, Gabriela Luisa Schmitz, Nayara de Souza Costa, Jean Paul Kamdem, João Batista Rocha, and Claudia Sirlene Oliveira. "The evolution of Selenium and Mercury research from 1700 to 2017 based on bibliometric analysis." Research, Society and Development 9, no. 2 (2020): e150922177. http://dx.doi.org/10.33448/rsd-v9i2.2177.

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Selenium and Mercury are two chemical elements studied in several fields of knowledge due to their chemical properties and interactions. The aim of this study was to analyze the evolution of research activity from 1700 to 2017 on the global trend of these elements, we carried out a bibliometric analysis using the Scopus database. For each keyword accessed (“selenium”, “selenide”, “selenite”, “selenate”, “organoselenium”, “mercury”, “inorganic mercury”, “mercury vapor” and “methylmercury”), we analyzed the publication output, and the top 5 geographic distribution of publications and contributin

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5

Breuer, Olof, Ola Brodin, Ali Razaghi, David Brodin, Bente Gammelgaard, and Mikael Björnstedt. "Intravenous Infusion of High Dose Selenite in End-Stage Cancer Patients: Analysis of Systemic Exposure to Selenite and Seleno-Metabolites." Biomedicines 11, no. 2 (2023): 295. http://dx.doi.org/10.3390/biomedicines11020295.

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Cancer is one of the main causes of human death globally and novel chemotherapeutics are desperately required. As a simple selenium oxide, selenite is a very promising chemotherapeutic because of pronounced its dose-dependent tumor-specific cytotoxicity. We previously published a first-in-man systematic phase I clinical trial in patients with cancer (from IV to end-stage) (the SECAR trial) showing that selenite is safe and tolerable with an unexpectable high maximum tolerated dose (MTD) and short half-life. In the present study, we analyzed the selenium species in plasma samples, from the pati

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6

Suzuki, Kazuo T., Chiaki Doi, and Noriyuki Suzuki. "Simultaneous tracing of multiple precursors each labeled with a different homo-elemental isotope by speciation analysis: Distribution and metabolism of four parenteral selenium sources." Pure and Applied Chemistry 80, no. 12 (2008): 2699–713. http://dx.doi.org/10.1351/pac200880122699.

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The availability, distribution, and metabolism of four typical selenium sources [inorganic selenite and selenate, and organic selenomethionine (SeMet) and methylselenocysteine (MeSeCys)] were compared by administering them simultaneously through a parenteral route. The four selenium sources were each labeled with a different enriched selenium isotope (82Se, 78Se, 77Se, and 76Se, respectively), and administered intravenously at the dose of 25 μg Se/kg body weight each to rats that had been depleted of natural abundance selenium with a single isotope, 80Se, by feeding 80Se-selenite in drinking w

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7

Mohapatra, Dipti Prakash, and Deepak M. Kirpalani. "Selenium in wastewater: fast analysis method development and advanced oxidation treatment applications." Water Science and Technology 79, no. 5 (2019): 842–49. http://dx.doi.org/10.2166/wst.2019.010.

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Abstract Selenium, a ubiquitous non-metal in nature, is potentially toxic to natural ecosystems due to its bioaccumulation potential. Due to increased monitoring and enforcement of selenium regulations, the need to be able to measure and treat selenium efficiently has taken on an increased importance. The principal aqueous forms of inorganic selenium are selenite (Se(IV)) and selenate (Se(VI)). Selenate, due to its high mobility and lack of affinity to conventional adsorbents, is typically much more difficult to treat and remove. To address both measurement and removal, an analytical method is

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8

Xie, Dongmei, Yulin Liao, Jirong Yue, et al. "Effects of five types of selenium supplementation for treatment of Kashin-Beck disease in children: a systematic review and network meta-analysis." BMJ Open 8, no. 3 (2018): e017883. http://dx.doi.org/10.1136/bmjopen-2017-017883.

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ObjectiveTo compare the effectiveness of five kinds of selenium supplementation for the treatment of patients with Kashin-Beck disease, and rank these selenium supplementations based on their performance.DesignWe searched for all publications between 1 January 1966 and 31 March 2017 using seven electronic databases. GRADE system to network meta-analyses (NMAs) was applied to rate the quality of the evidence. We conducted a random effects model NMA in STATA 12.1 to determine comparative effectiveness of each intervention. Rankings were obtained by using the surface under the cumulative ranking

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9

Badgar, Khandsuren, and József Prokisch. "simple method for preparing elemental selenium nano- coating inside a silicone surface." Acta Agraria Debreceniensis, no. 1 (June 1, 2021): 35–43. http://dx.doi.org/10.34101/actaagrar/1/8940.

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Selenium nanoparticles (SeNPs) with a bright red colour have aroused worldwide attention due to their unique properties in selenium supplementation because of their low toxicity and favourable bioavailability. A simple method was developed for making a red selenium nanolayer on the inner surface of Polyvinyl chloride (PVC) and silicone tube. The selenium nanoparticles were produced by the reaction of sodium selenite and ascorbic acid. Red amorphous selenium nanoparticles have been successfully synthesized by the reaction of 500 mg dm-3 Se (sodium selenite) solution with 10 g dm-3 ascorbic acid

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10

Eisenberg, Sylvan. "Relative Stability of Selenites and Selenates in Feed Premixes as a Function of Water Activity." Journal of AOAC INTERNATIONAL 90, no. 2 (2007): 349–53. http://dx.doi.org/10.1093/jaoac/90.2.349.

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Abstract Sodium selenite is more hygroscopic than sodium selenate. It is, therefore, more likely to dissolve when dispersed in feeds of relatively high water activity. When dissolved, it may form selenious acid and disperse as a vapor. This is easily demonstrated by mounting a filter paper wetted with a reagent such as ascorbic acid over the subject feed, but not in contact with it. The paper turns brown as elemental selenium is formed from reduction of the vapor. Analysis of the paper ensures that the brown is indeed selenium. Though premixes are generally low enough in moisture content to en

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11

Roux, Murielle, Géraldine Sarret, Isabelle Pignot-Paintrand, Marc Fontecave, and Jacques Coves. "Mobilization of Selenite by Ralstonia metallidurans CH34." Applied and Environmental Microbiology 67, no. 2 (2001): 769–73. http://dx.doi.org/10.1128/aem.67.2.769-773.2001.

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ABSTRACT Ralstonia metallidurans CH34 (formerlyAlcaligenes eutrophus CH34) is a soil bacterium characteristic of metal-contaminated biotopes, as it is able to grow in the presence of a variety of heavy metals. R. metalliduransCH34 is reported now to resist up to 6 mM selenite and to reduce selenite to elemental red selenium as shown by extended X-ray absorption fine-structure analysis. Growth kinetics analysis suggests an adaptation of the cells to the selenite stress during the lag-phase period. Depending on the culture conditions, the medium can be completely depleted of selenite. Selenium a

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12

Məmməd oğlu Qarayev, Əhməd, and Aliyə Bayram Rzayeva. "Studying of obtaining conditions of bismuth selenide in the aquatic medium." SCIENTIFIC RESEARCH 08, no. 4 (2022): 189–93. http://dx.doi.org/10.36719/2789-6919/08/189-193.

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Məqalədə bismut oksidin elementar selenlə qarşılıqlı təsirindən bismut(III) selenidə su mühitində trasformasiya şəraiti öyrənilməsi verilmişdir. Birləşmənin əmələ gəlməsinin temperaturdan, mühitin pH-dan, reduksiyaedicinin miqdarından asılılığı araşdırılmış və prosesin reaksiya tənliyi tərtib edilmişdir. Alınan maddənin fiziki kimyəvi xassələri TQ, DTA, RFA, və kimyəvi analiz metodları ilə müəyyən edilmişdir. Termoqravimetrik analizlə nümunədə Bi:Se nisbəti 90.65:49.98 təşkil etmişdir. Differensial termiki analizlə nümunənin ərimə temperaturunun 7050C olduğu təyin edilmişdir. Rentgen quruluş a

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13

Xu, Mengmeng, Song Zhu, Lingling Wang, et al. "Influence of Selenium Biofortification on the Growth and Bioactive Metabolites of Ganoderma lucidum." Foods 10, no. 8 (2021): 1860. http://dx.doi.org/10.3390/foods10081860.

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Selenium biofortification of edible and medicinal mushrooms is an effective way to produce selenium-enriched food supplements. Ganoderma lucidum is the typical one with excellent biological activity. This study investigated G. lucidum growth and bioactive metabolites alterations during liquid culture with different concentrations of selenite. Low selenium levels did not affect growth and mycelia morphology, whereas high selenium levels negatively influenced growth, dramatically decreased biomass, caused nucleic acid and protein leakage, damaged cell walls and membranes, and resulted in indicat

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14

Butler, Clive S., Charles M. Debieux, Elizabeth J. Dridge, Peter Splatt, and Matthew Wright. "Biomineralization of selenium by the selenate-respiring bacterium Thauera selenatis." Biochemical Society Transactions 40, no. 6 (2012): 1239–43. http://dx.doi.org/10.1042/bst20120087.

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Bacterial anaerobic respiration using selenium oxyanions as the sole electron acceptor primarily result in the precipitation of selenium biominerals observed as either intracellular or extracellular selenium deposits. Although a better understanding of the enzymology of bacterial selenate reduction is emerging, the processes by which the selenium nanospheres are constructed, and in some cases secreted, has remained poorly studied. Thauera selenatis is a Gram-negative betaproteobacterium that is capable of respiring selenate due to the presence of a periplasmic selenate reductase (SerABC). SerA

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15

Urbankova, Lenka, Pavel Horky, Jiri Skladanka, et al. "Antioxidant status of rats’ blood and liver affected by sodium selenite and selenium nanoparticles." PeerJ 6 (May 28, 2018): e4862. http://dx.doi.org/10.7717/peerj.4862.

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Background Selenium is an essential element; however, at higher doses, it can be toxic. Therefore, alternative nanotechnological solutions are required to overcome toxicological issues, rather than conventional alternatives. Nanoparticles show new and promising properties that may be able to suppress toxicity while maintaining the positive effects of selenium on an organism. The aim of the experiment was to determine the influence of sodium selenite and selenium nanoparticles (SeNPs) on the antioxidant status of rats. Methods The males of the outbreed rat strain Wistar albino were selected as

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16

Bluemlein, Katharina, Elizabeth Klimm, Andrea Raab, and Jörg Feldmann. "Selenite enhances arsenate toxicity in Thunbergia alata." Environmental Chemistry 6, no. 6 (2009): 486. http://dx.doi.org/10.1071/en09101.

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Environmental context. Arsenic and selenium are two elements ubiquitously distributed in our environment. While selenium is not known to be essential to plants, it is certainly toxic as is arsenic. On the other hand selenium is known to be essential for mammals and an increase in selenium concentration in plants when used as feed or food may be beneficial for mammals in regions of low selenium concentration. The wide distribution of these two elements in the soil might result in elevated co-exposure of plants. So far no interactions of those elements in plants have ever been studied, although

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17

Wang, Yuting, Xian Shu, Jinyan Hou, et al. "Selenium Nanoparticle Synthesized by Proteus mirabilis YC801: An Efficacious Pathway for Selenite Biotransformation and Detoxification." International Journal of Molecular Sciences 19, no. 12 (2018): 3809. http://dx.doi.org/10.3390/ijms19123809.

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Selenite is extremely biotoxic, and as a result of this, exploitation of microorganisms able to reduce selenite to non-toxic elemental selenium (Se0) has attracted great interest. In this study, a bacterial strain exhibiting extreme tolerance to selenite (up to 100 mM) was isolated from the gut of adult Monochamus alternatus and identified as Proteus mirabilis YC801. This strain demonstrated efficient transformation of selenite into red selenium nanoparticles (SeNPs) by reducing nearly 100% of 1.0 and 5.0 mM selenite within 42 and 48 h, respectively. Electron microscopy and energy dispersive X

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18

Feng, Zhiyuan, Charles C. Xu, Dadi Zhang, and Rudolph Buchheit. "Corrosion Protective Film Formation on Mg Alloy AZ31 by Exposure to Dilute Selenite Solutions." Materials 14, no. 2 (2021): 286. http://dx.doi.org/10.3390/ma14020286.

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The study of protective film formation on Mg alloys by exposure to sodium selenite solutions was conducted. Anodic polarization studies, electrochemical impedance spectroscopy studies, morphological analysis, and Energy-dispersive X-ray spectroscopy were performed on AZ31 Mg alloy after coating treatment in different concentrations of sodium selenite. The corrosion resistance was improved by around 5 times compared with control. Improved resistance to localized corrosion was observed in the coatings treated by 5 mM or 10 mM sodium selenite. The protection mechanism was ascribed to the transfor

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Feng, Zhiyuan, Charles C. Xu, Dadi Zhang, and Rudolph Buchheit. "Corrosion Protective Film Formation on Mg Alloys AZ 31 by Exposure to Dilute Selenite Solutions." Materials 14, no. 2 (2021): 286. http://dx.doi.org/10.3390/ma14020286.

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The study of protective film formation on Mg alloys by exposure to sodium selenite solutions was conducted. Anodic polarization studies, electrochemical impedance spectroscopy studies, morphological analysis, and Energy-dispersive X-ray spectroscopy were performed on AZ31 Mg alloy after coating treatment in different concentrations of sodium selenite. The corrosion resistance was improved by around 5 times compared with control. Improved resistance to localized corrosion was observed in the coatings treated by 5 mM or 10 mM sodium selenite. The protection mechanism was ascribed to the transfor

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20

Heindl, J., Z. Ledvinka, M. Englmaierová, L. Zita, and E. Tůmová. "The effect of dietary selenium sources and levels on performance, selenium content in muscle and glutathione peroxidase activity in broiler chickens." Czech Journal of Animal Science 55, No. 12 (2010): 572–78. http://dx.doi.org/10.17221/2487-cjas.

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The study examined the effect of dietary supplements of sodium selenite (SS), selenium-enriched yeast (Sel-Plex&reg;, SP) and selenium-enriched alga Chlorella (SCH) on growth traits, carcass analysis, selenium content in breast meat, glutathione peroxidase (GSH-Px) activity in breast and thigh meat and liver of chickens. The experiment was realized with seven hundred thirty-five cockerels Ross 308 randomly divided into 7 dietary treatments with 3 replications in each treatment. Chickens were fed a diet supplemented with 0 (control), 0.15 or 0.30 mg of selenium/kg in the form of sodium sele

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21

Köhnlein, Karl, Nadine Urban, Holger Steinbrenner, et al. "Selenite-induced Expression of a Caenorhabditis elegans Pro-aging Factor and Ortholog of Human Selenium-binding Protein 1." Current Nutraceuticals 1, no. 1 (2020): 73–79. http://dx.doi.org/10.2174/2665978601666200212105825.

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Background: The essential trace element and micronutrient selenium exerts most of its biological actions through incorporation into selenoproteins as selenocysteine. Two further types of Se-containing proteins exist, including those that have selenomethionine incorporated instead of methionine, and the group of selenium-binding proteins. We previously described an ortholog of selenium-binding protein 1 (SELENBP1) in the nematode Caenorhabditis elegans, Y37A1B.5, and demonstrated that it confers resistance to toxic selenite concentrations while impairing general stress resistance and life expec

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22

Nigro, Marco. "Mercury and selenium localization in macrophages of the striped dolphin, Stenella coeruleoalba." Journal of the Marine Biological Association of the United Kingdom 74, no. 4 (1994): 975–78. http://dx.doi.org/10.1017/s0025315400090226.

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The cellular features of mercury and selenium accumulation has been studied by transmission electron microscopy and x-ray microprobe analysis in the liver of striped dolphins. Mercury and selenium occurred as dense intracellular granules, located mainly within the liver macrophages (Kupffer cells). Granules were composed of 150 A spherical particles showing the same electron diffraction pattern and x-ray spectrum as mercuric selenide. The role of macrophages in mercuric selenide granule production and storage is discussed.

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23

Zhang, Junmin, Chaohua Tang, and Kai Zhang. "PSIV-B-36 Late-Breaking: Selenium content and speciation in muscle of pigs fed diets supplemented with different selenium sources and doses." Journal of Animal Science 97, Supplement_3 (2019): 326–27. http://dx.doi.org/10.1093/jas/skz258.655.

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Abstract Selenium (Se) is an essential element for pigs with diet being the major source of intake, while the metabolic process of different sources and doses of dietary Se in pigs muscle remains unclear. In this study, a reliable HPLC-ICP-MS approach was developed for analyzing selenium speciation in the muscle of pigs, which could analyze seven selenium speciation in ten minutes. This approach was used to study the metabolism of different sources and doses of dietary selenium in pigs muscle. In total, 108 castrated male pigs (Duroc × Landrace × Yorkshire, 61.3 ± 3.3 kg) were randomly assigne

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Hockin, Simon L., and Geoffrey M. Gadd. "Linked Redox Precipitation of Sulfur and Selenium under Anaerobic Conditions by Sulfate-Reducing Bacterial Biofilms." Applied and Environmental Microbiology 69, no. 12 (2003): 7063–72. http://dx.doi.org/10.1128/aem.69.12.7063-7072.2003.

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ABSTRACT A biofilm-forming strain of sulfate-reducing bacteria (SRB), isolated from a naturally occurring mixed biofilm and identified by 16S rDNA analysis as a strain of Desulfomicrobium norvegicum, rapidly removed 200 μM selenite from solution during growth on lactate and sulfate. Elemental selenium and elemental sulfur were precipitated outside SRB cells. Precipitation occurred by an abiotic reaction with bacterially generated sulfide. This appears to be a generalized ability among SRB, arising from dissimilatory sulfide biogenesis, and can take place under low redox conditions and in the d

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Siddiqui, Shahida Anusha, Andrey Vladimirovich Blinov, Alexander Vladimirovich Serov, et al. "Effect of Selenium Nanoparticles on Germination of Hordéum Vulgáre Barley Seeds." Coatings 11, no. 7 (2021): 862. http://dx.doi.org/10.3390/coatings11070862.

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Within the framework of this study, the effect of nanoparticles of the essential trace element selenium stabilized by Polyvinylpirrolidone (PVP) C15 (8 ± 2 kDa) and ascorbic acid on the germination of barley seeds has been studied. Selenium nanoparticles stabilized by PVP C15 (8 ± 2 kDa) and ascorbic acid, characterized by a spherical shape, monodisperse size distribution, and a diameter of about 70 ± 5 nm, were obtained by the chemical reduction method. The experiment compared the effect of selenium nanoparticles and selenous acid on seed germination. The positive effect of preparation of sel

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Sindireva, Anna, Oleg Zayko, Vadim Astashov, Inna Borodina, Elizaveta Guseva, and Polina Zaytseva. "Analysis of the complete blood count in male Wistar rats exposed to different doses of orally administered sodium selenite." Archiv Euromedica 12, no. 2 (2022): 15–16. http://dx.doi.org/10.35630/2199-885x/2022/12/2.4.

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Aims: To compare the structure of the formula and morphological characteristics of the blood cells after an acute experiment in laboratory rats with oral administration of sodium selenite at a concentration of selenium (Se) 0.5, 1 and 2 maximum permissible concentration (MPC). Methods: Four groups of Wistar rats weighing 260–300 g (a control group and three experimental ones: Se group of 0.5 MPC, 1 MPC and 2 MPC) were given sodium selenite in the respective concentrations for 5 days (except for the control group). After the rats were removed from the experiment, blood was taken from the caudal

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Kowalik, R. "The Voltammetric Analysis of Selenium Electrodeposition from H2SeO3 Solution on Gold Electrode." Archives of Metallurgy and Materials 60, no. 1 (2015): 57–63. http://dx.doi.org/10.1515/amm-2015-0009.

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Abstract The different voltammetry techniques were applied to understand the process of selenium deposition from sulfate solution on gold polycrystalline electrode. By applying the cycling voltammetry with different scan limits as well as the chronoamper-ometry combined with the cathodic and anodic linear stripping voltammetry, the different stages of the deposition of selenium were revealed. It was found that the process of reduction of selenous acid on gold surface exhibits a multistage character. The cyclic voltammetry results showed four cathodic peaks which are related to the surface limi

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Luo, Yue, Gang Chen, Xiuqing Deng, et al. "Speciation of Selenium in Selenium-Enriched Foods by High-Performance Liquid Chromatography-Inductively Coupled Plasma-Tandem Mass Spectrometry." Separations 9, no. 9 (2022): 242. http://dx.doi.org/10.3390/separations9090242.

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Herein, a method was established for the speciation of six selenium species by high performance liquid chromatography-inductively coupled plasma-tandem mass spectrometry (HPLC-ICP-MS/MS). The factors affecting separation were carefully investigated, including ionic strength, pH, and methanol content. Six species of selenium could be completely separated within 20 min, under the mobile phase of 25 mM citric acid in pH = 4.0 containing 2% methanol. The detection limits of selenite (Se(IV)), selenate (Se(VI)), selenomethionine (SeMet), selenocystine (SeCys2), methylselenocysteine (MeSeCys), and s

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Weekley, Claire M., Jade B. Aitken, Paul K. Witting, and Hugh H. Harris. "XAS studies of Se speciation in selenite-fed rats." Metallomics 6, no. 12 (2014): 2193–203. http://dx.doi.org/10.1039/c4mt00227j.

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Smith, N. R., B. J. Bramlett, C. Echer, and B. A. Dixon. "Analysis of selenium granules in Aeromonas hydrophila." Proceedings, annual meeting, Electron Microscopy Society of America 49 (August 1991): 324–25. http://dx.doi.org/10.1017/s0424820100085927.

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Selenium (Se) is a naturally occurring nonmetallic element found in the environment as a result of fossil fuel combustion and industrial and agricultural processes. Although it is an essential trace element for plants and animals, high levels of soluble Se in agricultural drainage water have had deleterious effects on fish and waterfowl. The toxic forms of Se exist as selenate (+VI) and selenite (+IV) and both valence forms can be chemically reduced to insoluble, non-toxic elemental Se (O).A number of microorganisms are capable of reducing soluble Se to the zero valence state. Models have been

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Hooven, L. A., J. Butler, L. W. Ream, and P. D. Whanger. "Microarray Analysis of Selenium-Depleted and Selenium-Supplemented Mice." Biological Trace Element Research 109, no. 2 (2006): 173–80. http://dx.doi.org/10.1385/bter:109:2:173.

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Ferreira, Gabriela de Sousa, Paulo Ovídio Batista De Brito, Tiago de Abreu Lima, et al. "Assessment of the effects of selenium application on leaves or substrate on the growth of sunflower plants." Brazilian Journal of Animal and Environmental Research 5, no. 4 (2022): 3972–82. http://dx.doi.org/10.34188/bjaerv5n4-041.

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Though Selenium (Se) is a nonessential micronutrient to plants, its presence under appropriate concentrations helps in the plant antioxidant system, thus benefiting crop growth and productivity. Considering the need for acclimatization of crops due to climate changes and the need for diversification of the energy matrix, this study aimed to assess the different concentrations and forms of application of selenium (sodium selenite and sodium selenate) suitable for the cultivation of sunflower plants through growth analysis (height, diameter and number of leaves) and relative chlorophyll contents

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Vyas, Jay, and Shafkat Rana. "ANTIOXIDANT ACTIVITY AND BIOGENIC SYNTHESIS OF SELENIUM NANOPARTICLES USING THE LEAF EXTRACT OF ALOE VERA." International Journal of Current Pharmaceutical Research 9, no. 4 (2017): 147. http://dx.doi.org/10.22159/ijcpr.2017v9i4.20981.

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Objective: The objective of this present study were to the biogenic synthesis of selenium nanoparticles using Aloe vera extract and check it’s antioxidant potential by ABTS, DPPH and FRAP assays.Methods: In this study we investigated the clove of Aloe vera, which is used for the synthesis of selenium nanoparticles were characterized by using UV-Visible (UV-VIS) spectrophotometer, Transmission electron microscopy (TEM), Fourier transform spectroscopy (FTIR) and Energy dispersive X-Ray spectroscopy (EDAX) and ABTS, DPPH and FRAP assays for checked it’s antioxidant potential.Results: The present

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Tendenedzai, Job T., Evans M. N. Chirwa, and Hendrik G. Brink. "Performance Evaluation of Selenite (SeO32−) Reduction by Enterococcus spp." Catalysts 11, no. 9 (2021): 1024. http://dx.doi.org/10.3390/catal11091024.

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Lactic acid bacteria (LAB) such as Enterococcus spp. have an advantage over several bacteria because of their ability to easily adapt to extreme conditions which include high temperatures, highly acidic or alkaline conditions and toxic metals. Although many microorganisms have been shown to reduce selenite (SeO32−) to elemental selenium (Se0), not much work has been done on the combined effect of Enterococcus spp. In this study, aerobic batch reduction of different selenite concentrations (1, 3 and 5 mM) was conducted using Enterococcus hermanniensis sp. and Enterococcus gallinarum sp. (3.5 h,

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Bódi, Éva, Judit Remenyik, Andrea Nemes, et al. "Definition antioxidant activity of selenium-enriched food sprout, as well as their microbiological analysis." Acta Agraria Debreceniensis, no. 52 (March 20, 2013): 25–30. http://dx.doi.org/10.34101/actaagrar/52/2094.

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In this present study, we prepared selenium-enriched food sprouts, where the antioxidant capacity was analysed, we also determined their microbiological status. We took into account the fact, we choose micronutrients to our treatment, that selenium can be delivered to the body by a small amount with the most widely consumed food. We focused during our research to determine that the increasing concentrations of selenium treatment, in which we used sprouts, knowing fully well that it has an impact on aboriginal antioxidant capacity of sprouts, which is mainly due to high vitamin content of

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Karaś, Katarzyna, Anetta Zioła-Frankowska, and Marcin Frankowski. "New Method for Simultaneous Arsenic and Selenium Speciation Analysis in Seafood and Onion Samples." Molecules 26, no. 20 (2021): 6223. http://dx.doi.org/10.3390/molecules26206223.

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This paper presents a new method for the simultaneous speciation analysis of arsenic (As(III)-arsenite, As(V)-arsenate, DMA-dimethylarsinic acid, MMA-methylarsonic acid, and AsB-arsenobetaine) and selenium (Se(IV)-selenite, Se(VI)-selenate, Se-Methionine, and Se-Cystine), which was applied to a variety of seafood and onion samples. The determination of the forms of arsenic and selenium was undertaken using the High-Performance Liquid Chromatography Inductively Coupled Plasma Mass Spectrometry (HPLC–ICP–MS) analytical technique. The separation of both organic and inorganic forms of arsenic and

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Ferreira, Gabriela de Sousa, Paulo Ovidio Batista de Brito, Tiago de Abreu Lima, et al. "Plant Growth and Antioxidative Enzymes in Sunflower Supplemented With Selenium." Journal of Agricultural Science 15, no. 1 (2022): 62. http://dx.doi.org/10.5539/jas.v15n1p62.

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The use of soil additives such as selenium can positively influence the antioxidative system of plants, making them more tolerant to abiotic stresses. The aim of this work was to evaluate the concentration of sodium selenite or sodium selenate applied to the substrate that causes improve in plant growth and antioxidative enzyme activities in sunflower plants. The treatments were divided in: control (absence of selenium); 0.2 mg L-1 of sodium selenate; 0.4 mg L-1 of sodium selenate; 0.8 mg L-1 of sodium selenate; 0.2 mg L-1 of sodium selenite; 0.4 mg L-1 of sodium selenite and 0.8 mg L-1 of sod

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Dai, Ting, Sun Xiaoying, Xin Li, Li Hongjin, Zhou Yaqiong, and Liang Bo. "Selenium Level in Patients with Vitiligo: A Meta-Analysis." BioMed Research International 2020 (June 12, 2020): 1–7. http://dx.doi.org/10.1155/2020/7580939.

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Background. It has been reported that deficiency of selenium can cause autoimmune disease. This meta-analysis was aimed at evaluating whether there exits an association between selenium level and vitiligo. Methods. A comprehensive search was conducted on PubMed, Embase, China National Knowledge Infrastructure (CNKI), Wanfang Med Online, and China VIP databases from the inception to February 12, 2019. The main outcome was the standardized mean difference (SMD) with 95% confidence interval (CI) in serum selenium level between vitiligo patients and healthy controls. Results. A total of 8 studies

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Tran, Trang Minh, Dung Tien Pham, Phong Quoc Le, and Hiep Minh Dinh. "Study on the selenium absorptive ability of Ophiocordyceps sinensis fungus in liquid cultures." Science and Technology Development Journal 19, no. 4 (2016): 53–61. http://dx.doi.org/10.32508/stdj.v19i4.705.

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Ophiocordyceps sinensis is a medicinal mushroom which is highly valued in traditional and modern medicine. Besides, selenium (Se) is an essential trace element in the human body. Therefore, the study on selenium accumulation ability of O. sinensis fungus to improve its bioactivities as well as selenium bioavailability is extremely imperative. In this research, O. sinensis cultured on liquid medium with sodium selenite (Se+4) or sodium selenate (Se+6) at 0–30 mg/L concentrations, then isolated three selenium-containing compounds including selenium-exopolysaccharide (Se-EPS), selenium-polysaccha

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Stoedter, Mette, Kostja Renko, Antonia Hög, and Lutz Schomburg. "Selenium controls the sex-specific immune response and selenoprotein expression during the acute-phase response in mice." Biochemical Journal 429, no. 1 (2010): 43–51. http://dx.doi.org/10.1042/bj20091868.

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Selenium modifies inflammatory reactions in rodents and humans. The liver controls metabolism and transport of selenium via hepatically-derived SEPP (selenoprotein P). Intracellular SEPS (selenoprotein S) modifies endoplasmic-reticulum function and immune-cell activity. Polymorphisms in SEPS have been associated with cytokine levels and inflammatory diseases in a subset of clinical studies. In the present study, we hypothesized that sex and selenium represent decisive parameters controlling the immune response and regulation of SEPS expression in vivo. Male and female mice fed a selenium-poor

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Siddiqa, Ayesha, and Muhammad Faisal. "Isolation of Selenite reducing plant growth promoting novel genus bacteria from Pakistan." Research Journal of Biotechnology 17, no. 10 (2022): 1–11. http://dx.doi.org/10.25303/1710rjbt01011.

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Selenium has been known as a notorious heavy metal due to its toxicity but now its essentiality as an important micronutrient and seleno-protein has changed the perspective of researchers. Bioremediation of toxic oxyanions of selenium has gained the attention in previous decades as it provides the immediate, inexpensive and essentially safe outcomes uses of biologically safe bacterial strains are encouraged. In the present study, four novel bacterial strains are isolated from KPK and Punjab provinces of Pakistan that have highly resistant to toxic selenite and selenite, meanwhile they are capa

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Shan, Yao, Yong Qin, and Wenfeng Wang. "Selenium Migration Mode in Coal Seams: Insights from Multivariate Analysis, Leaching Investigation, and Modelling." International Journal of Chemical Engineering 2022 (April 12, 2022): 1–14. http://dx.doi.org/10.1155/2022/6189492.

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Processes controlling selenium concentrations ([Se]) in mine waters were studied at an operating coalmine district in Xuzhou city, China. The geochemistry and mobility of selenium was studied through leaching experiments, multivariate analysis, and numerical modeling. Results showed that selenium leaching was influenced by selenium occurrence in minerals, pH, electron activity (pe), and sulfur concentration in the water. Selenium occurrence in host rock was mainly sulfide minerals, and clay minerals in coal, respectively. Therefore, the oxidation and dissolution of sulfide minerals and transfo

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Constantinescu-Aruxandei, Diana, Rodica Frîncu, Luiza Capră, and Florin Oancea. "Selenium Analysis and Speciation in Dietary Supplements Based on Next-Generation Selenium Ingredients." Nutrients 10, no. 10 (2018): 1466. http://dx.doi.org/10.3390/nu10101466.

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Selenium is essential for humans and the deficit of Se requires supplementation. In addition to traditional forms such as Se salts, amino acids, or selenium-enriched yeast supplements, next-generation selenium supplements, with lower risk for excess supplementation, are emerging. These are based on selenium forms with lower toxicity, higher bioavailability, and controlled release, such as zerovalent selenium nanoparticles (SeNPs) and selenized polysaccharides (SPs). This article aims to focus on the existing analytical systems for the next-generation Se dietary supplement, providing, at the sa

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Buentzel, J., O. Micke, M. Glatzel, F. Bruns, K. Kisters, and R. Muecke. "Evaluation of the effect of selenium on radiation-induced toxicities in head neck cancer patients." Journal of Clinical Oncology 27, no. 15_suppl (2009): e20698-e20698. http://dx.doi.org/10.1200/jco.2009.27.15_suppl.e20698.

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e20698 Background: The substitution of selenium effects in activation of the selenium dependent enzyme glutathione peroxidase which is important for scavenging free radicals. Until today only limited data are available about the clinical impact of selenium regarding the toxicities due to free radical producing therapies, e.g. irradiation or chemotherapy. Methods: 39 patients (8 female, 31 male) with advanced head neck cancer were included to a randomized phase II study. All patients had shown a reduced concentration of selenium in the blood and serum (main inclusion criterium). The mean age wa

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Zhang, Lv Yin, Xiao Ping Yu, Ya Fei Guo, and Tian Long Deng. "Selenium Species Analysis by Chromatography Hyphenated Techniques." Applied Mechanics and Materials 71-78 (July 2011): 2614–17. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.2614.

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Selenium species analysis based on chromatography hyphenated techniques including reversed-phase, ion-exchange, size exclusion, affinity chromatography and so on were summarized in this paper, and the new trend for selenium species analysis in the future was also carried out.

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Zinicovscaia, Inga, Liudmila Rudi, Ana Valuta, et al. "Biochemical Changes in Nostoc linckia Associated with Selenium Nanoparticles Biosynthesis." Ecological Chemistry and Engineering S 23, no. 4 (2016): 559–69. http://dx.doi.org/10.1515/eces-2016-0039.

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Abstract The cyanobacterium Nostoc linckia was used to study the biotechnology of selenium nanoparticles synthesis for the first time. The experimental conditions of the nanoparticle production by the studied cyanobacteria in aqueous cobalt selenite solutions were examined. Neutron activation analysis allowed characterization of the dynamics of accumulation of the total selenium quantity by Nostoc linckia. Scanning Electron Microscope images demonstrated extracellular formation of amorphous nanoparticles. Released selenium nanoparticles ranged in size from 10 to 80 nm. The changes of essential

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Perri, Giorgia, Nuno Mendonça, Carol Jagger, et al. "Dietary Selenium Intakes and Musculoskeletal Function in Very Old Adults: Analysis of the Newcastle 85+ Study." Nutrients 12, no. 7 (2020): 2068. http://dx.doi.org/10.3390/nu12072068.

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Background: Selenium is a trace element essential for health. Severe selenium deficiencies are associated with poor musculoskeletal (MSK) function. However, the effects of moderate deficiency on MSK function, especially in older adults, is unclear. Objectives: To determine the associations between selenium intake and MSK function in very old adults. Methods: Selenium intake at baseline and, hand-grip strength (HGS) and timed-up-and-go (TUG) at four phases over 5 years, were available in 791 participants in the Newcastle 85+ Study, a community-based, longitudinal cohort of ≥ 85 year old individ

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Ringuet, Mitchell T., Billie Hunne, Markus Lenz, David M. Bravo, and John B. Furness. "Analysis of Bioavailability and Induction of Glutathione Peroxidase by Dietary Nanoelemental, Organic and Inorganic Selenium." Nutrients 13, no. 4 (2021): 1073. http://dx.doi.org/10.3390/nu13041073.

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Dietary organic selenium (Se) is commonly utilized to increase formation of selenoproteins, including the major antioxidant protein, glutathione peroxidase (GPx). Inorganic Se salts, such as sodium selenite, are also incorporated into selenoproteins, and there is evidence that nanoelemental Se added to the diet may also be effective. We conducted two trials, the first investigated inorganic Se (selenite), organic Se (L-selenomethionine) and nanoelemental Se, in conventional mice. Their bioavailability and effectiveness to increase GPx activity were examined. The second trial focused on determi

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Faramarzi, Sara, Younes Anzabi, and Hoda Jafarizadeh-Malmiri. "Selenium supplementation during fermentation with sugar beet molasses and Saccharomyces cerevisiae to increase bioethanol production." Green Processing and Synthesis 8, no. 1 (2019): 622–28. http://dx.doi.org/10.1515/gps-2019-0032.

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Abstract A bench scale submerged fermentation process was used to bioethanol produce using sugar beet molasses and Saccharomyces cerevisiae, as substrate and microbial strain, respectively. Effects of selenium amount on growth of S. cerevisiae and bioethanol production were evaluated. The obtained results indicated that growth of S. cerevisiae (manifested as turbidity intensity) in the samples containing 0, 5, 10, 15, 20 and 25 μg sodium selenite, during aerobic process, was 0.1707, 0.1678, 0.1679, 0.1664, 0.1627 and 0.160% a.u./h (after 14 h incubation), respectively. Statistical analysis bas

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Fu, Shaojie, Li Zhang, Fuzhe Ma, Shuai Xue, Tao Sun, and Zhonggao Xu. "Effects of Selenium on Chronic Kidney Disease: A Mendelian Randomization Study." Nutrients 14, no. 21 (2022): 4458. http://dx.doi.org/10.3390/nu14214458.

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Background: Previous observational studies have shown that there is a controversial association between selenium levels and chronic kidney disease (CKD). Our aim was to assess the causal relationship between selenium levels and CKD using Mendelian randomization (MR) analysis. Methods: We used the two-sample Mendelian randomization (MR) method to analyze the causal role of selenium levels on CKD risk. The variants associated with selenium levels were extracted from a large genome-wide association study (GWAS) meta-analysis of circulating selenium levels (n = 5477) and toenail selenium levels (n

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