325473

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Identification of selenium species in selenium-enriched Lens esculenta plants by using two-dimensional liquid chromatography-inductively coupled plasma mass spectrometry and [77Se]selenomethionine selenium oxide spikes.

Zoyne Pedrero et al.

Journal of chromatography. A, 1139(2), 247-253 (2006-12-05)

Selenium speciation in Se-enriched Lens esculenta grown in hydroponic culture containing inorganic selenium as Na(2)SeO(3) and Na(2)SeO(4) was performed. After 16 days of growth, the plants were collected and divided in two parts, roots and stems and then analysed to

X-ray absorption spectroscopic, crystallographic, theoretical (DFT) and chemical evidence for a chalcogen-chalcogen two-center/three-electron half bond in an unprecedented "subselenide" Se2(3-) ligand.

Shu A Yao et al.

Chemistry (Weinheim an der Bergstrasse, Germany), 18(30), 9179-9183 (2012-06-26)

Doing things by halves: The dimeric compound (Cp'Ni)(2)(μ(2)-Se(2)) (Cp' = 1,2,3,4-tetraisopropylcyclopentadienyl), shown in the scheme, was investigated by using low temperature X-ray crystallography and X-ray absorption spectroscopy. The Se K-edge energy strongly indicates a Se physical oxidation state of -1.5

Selenium dioxide oxidations in the indole area. Synthesis of β-carboline alkaloids.

Cain M, et al.

Journal of the American Chemical Society, 105(4), 907-913 (1983)

Allylic oxidation of olefins by catalytic and stoichiometric selenium dioxide with tert-butyl hydroperoxide.

Umbreit M A and Sharpless K B

Journal of the American Chemical Society, 99(16), 5526-5528 (1977)

Reversal of cadmium-induced oxidative stress in rat erythrocytes by selenium, zinc or their combination.

Imed Messaoudi et al.

Experimental and toxicologic pathology : official journal of the Gesellschaft fur Toxikologische Pathologie, 62(3), 281-288 (2009-05-26)

The aim of this study was to evaluate the potential benefit of combined treatment with zinc (Zn) and selenium (Se) in reversing cadmium (Cd)-induced oxidative stress in erythrocytes, compared to Se or Zn treatment alone in rats exposed to Cd.

Synthetic studies on pseudo-dimeric Lycopodium alkaloids: total synthesis of complanadine B.

James N Newton et al.

Angewandte Chemie (International ed. in English), 52(6), 1726-1730 (2013-01-12)

Enhanced Antibacterial Activity of Se Nanoparticles Upon Coating with Recombinant Spider Silk Protein eADF4(κ16).

Tao Huang et al.

International journal of nanomedicine, 15, 4275-4288 (2020-07-02)

Selenium nanoparticles (Se NPs) are promising antibacterial agents to tackle the growing problem of antimicrobial resistance. The aim of this study was to fabricate Se NPs with a net positive charge to enhance their antibacterial efficacy. Se NPs were coated

Glutathione peroxidase isoenzymes in human tumor cell lines.

T Paukert et al.

Die Pharmazie, 66(11), 894-898 (2011-12-30)

A set of human tumor cell lines was characterized in terms of the GPx isoenzymes GPx1, -2, -3 and -4. Semiquantitative PCR was used to investigate the GPx mRNA transcripts and the GPx activity was determined photometrically. As a result

Effect of chronic cadmium exposure on antioxidant defense system in some tissues of rats: protective effect of selenium.

B I Ognjanović et al.

Physiological research, 57(3), 403-411 (2007-05-01)

The effects of selenium (Se) on antioxidant defense system in liver and kidneys of rats with cadmium (Cd)-induced toxicity were examined. Cd exposure (15 mg Cd/kg b.m./day as CdCl(2) for 4 weeks) resulted in increased lipid peroxidation (LP) in both

Bentonite modification with hexadecylpyridinium and aluminum polyoxy cations and its effectiveness in Se(IV) removal.

Esra Orucoglu et al.

Journal of environmental management, 160, 30-38 (2015-06-18)

Usage of bentonite as a buffer material is suggested in radioactive waste repositories. Although bentonites have higher sorption ability to cations, they cannot adsorp anions due to negative surface charge. Nowadays, ongoing researches focus on increasing anion adsorption ability of

Synthesis of core-shell magnetic molecular imprinted polymer by the surface RAFT polymerization for the fast and selective removal of endocrine disrupting chemicals from aqueous solutions.

Ying Li et al.

Environmental pollution (Barking, Essex : 1987), 158(6), 2317-2323 (2010-03-05)

In this study, we present a general protocol for the making of surface-imprinted core-shell magnetic beads via reversible addition-fragmentation chain transfer (RAFT) polymerization using RAFT agent functionalized iron oxide nanoparticles as the chain transfer agent. The resulting composites were characterized

A reversible fluorescent probe for detecting hypochloric acid in living cells and animals: utilizing a novel strategy for effectively modulating the fluorescence of selenide and selenoxide.

Zhangrong Lou et al.

Chemical communications (Cambridge, England), 49(24), 2445-2447 (2013-02-19)

Based on a novel strategy for modulating the fluorescence of selenide and selenoxide, we have designed and developed a reversible fluorescent probe for hypochloric acid. And the synthesis, characterization, fluorescence properties, as well as the biological applications in living cells

Synthesis of cyclic selenenate/seleninate esters stabilized by ortho-nitro coordination: their glutathione peroxidase-like activities.

Vijay P Singh et al.

Chemistry, an Asian journal, 6(6), 1431-1442 (2011-05-11)

The syntheses of selenenate/seleninate esters and related derivatives by aromatic nucleophilic substitution (S(N)Ar) reactions of 2-bromo-3-nitrobenzylalcohol (13) and 2-bromo-3-nitrobenzaldehyde (17) with Na(2)Se(2)/nBuSeNa are described. The reaction of 13 with Na(2)Se(2) at room temperature afforded 7-nitro-1,2-benzisoselenole(3H) (15) instead of the desired

Ternary SnS(2-x)Se(x) Alloys Nanosheets and Nanosheet Assemblies with Tunable Chemical Compositions and Band Gaps for Photodetector Applications.

Jing Yu et al.

Scientific reports, 5, 17109-17109 (2015-12-01)

Ternary metal dichalcogenides alloys exhibit compositionally tunable optical properties and electronic structure, and therefore, band gap engineering by controllable doping would provide a powerful approach to promote their physical and chemical properties. Herein we obtained ternary SnS(2-x)Se(x) alloys with tunable

Selenium accumulation, distribution, and speciation in spineless prickly pear cactus: a drought- and salt-tolerant, selenium-enriched nutraceutical fruit crop for biofortified foods.

Gary S Bañuelos et al.

Plant physiology, 155(1), 315-327 (2010-11-10)

The organ-specific accumulation, spatial distribution, and chemical speciation of selenium (Se) were previously unknown for any species of cactus. We investigated Se in Opuntia ficus-indica using inductively coupled plasma mass spectrometry, microfocused x-ray fluorescence elemental and chemical mapping (μXRF), Se

Bridgehead enolates and bridgehead alkenes in a welwistatin model series.

Valerie Boissel et al.

Chemical communications (Cambridge, England), (11)(11), 1398-1400 (2009-03-05)

Bridgehead metallation is possible in a ketone having the welwistatin skeleton, and this facilitates installation of the isothiocyanate function present in the natural product, and also enables synthesis of remarkable bridgehead alkenes.

Simultaneous removal of SO2 and trace SeO2 from flue gas: effect of SO2 on selenium capture and kinetics study.

Yuzhong Li et al.

Environmental science & technology, 40(24), 7919-7924 (2007-01-30)

Sulfur dioxide (SO2) and trace elements are all pollutants derived from coal combustion. This study relates to the simultaneous removal of SO2 and trace selenium dioxide (SeO2) from flue gas by calcium oxide (CaO) adsorption in the moderate temperature range

Configuration interaction study of the electronic states and spectroscopic properties of selenium monoxide.

Surya Chattopadhyaya et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 89, 160-167 (2012-01-21)

The electronic spectrum of the selenium monoxide (SeO) molecule has been studied theoretically by using ab initio based multireference singles and doubles configuration interaction (MRDCI) methodology, which includes relativistic effective core potentials (RECP) and suitable Gaussian basis sets of the

Oxidation reactions of acetylenic fatty esters with selenium dioxide/tert-butyl hydroperoxide.

Jie M S L K, et al.

Lipids, 32(10), 1119-1123 (1997)

Synthesis of 3-aminomethyl-2-aryl- 8-bromo-6-chlorochromones.

Erik A A Wallén et al.

Organic letters, 9(3), 389-391 (2007-01-26)

[reaction: see text] An efficient synthetic route to Cbz-protected 3-aminomethyl-2-aryl-8-bromo-6-chlorochromones has been developed. 3-Aryl-1-(3-bromo-5-chloro-2-hydroxyphenyl)-2-propen-1-one or 2-aryl-8-bromo-6-chlorochroman-4-one could be reacted under Mannich conditions yielding 2-aryl-8-bromo-6-chloro-3-methylenechroman-4-one, which was further converted to the target compound via an aza-Michael reaction followed by an SeO(2)

Regio- and stereoselective selenium dioxide allylic oxidation of (E)-dialkyl alkylidenesuccinates to (Z)-allylic alcohols: synthesis of natural and unnatural butenolides.

Ramesh M Patel et al.

Organic & biomolecular chemistry, 9(18), 6312-6322 (2011-07-28)

The first SeO(2) induced (Z)-selective allylic alcohol formation of dialkyl alkylidenesuccinates has been demonstrated to accomplish one-step syntheses of several essential butenolides and fused butenolides via an unusual E- to Z- carbon-carbon double bond isomerisation followed by the lactonization pathway.

Size- and shape-controlled synthesis of ZnSe nanocrystals using SeO2 as selenium precursor.

Huaibin Shen et al.

Dalton transactions (Cambridge, England : 2003), 39(47), 11432-11438 (2010-10-27)

Here we report a low-cost and "green" phosphine-free route for the size- and shape-controlled synthesis of high-quality zinc blende (cubic) ZnSe nanocrystals. To avoid the use of expensive and toxic solvents such as trioctylphosphine (TOP) or tributylphosphine (TBP), SeO(2) was

Doping effects of Co and Cu on superconductivity and magnetism in Fe1+yTe0.6Se0.4 single crystals.

Z T Zhang et al.

Journal of physics. Condensed matter : an Institute of Physics journal, 25(3), 035702-035702 (2012-12-15)

We report on the investigation of Co and Cu substitution effects on superconductivity and magnetism in Fe(1+y)Te(0.6)Se(0.4) single crystals. The parent Fe(1.01)Te(0.59)Se(0.41) shows a nodeless bulk superconductivity as revealed in heat capacity measurement, which is gradually suppressed by either Co

A Novel Europium Chelate Coated Nanosphere for Time-Resolved Fluorescence Immunoassay.

Yifeng Shen et al.

PloS one, 10(6), e0129689-e0129689 (2015-06-10)

A novel europium ligand 2,2',2'',2'''-(4,7-diphenyl-1,10-phenanthroline-2,9-diyl) bis (methylene) bis (azanetriyl) tetra acetic acid (BC-EDTA) was synthesized and characterized. It shows an emission spectrum peak at 610 nm when it is excited at 360 nm, with a large Stock shift (250 nm).

Development of an accurate and high-throughput methodology for structural comprehension of chlorophylls derivatives. (I) Phytylated derivatives.

Kewei Chen et al.

Journal of chromatography. A, 1406, 99-108 (2015-06-21)

Phytylated chlorophyll derivatives undergo specific oxidative reactions through the natural metabolism or during food processing or storage, and consequently pyro-, 13(2)-hydroxy-, 15(1)-hydroxy-lactone chlorophylls, and pheophytins (a and b) are originated. New analytical procedures have been developed here to reproduce controlled

Selenium nanoparticles inhibit the growth of HeLa and MDA-MB-231 cells through induction of S phase arrest.

Haiying Luo et al.

Colloids and surfaces. B, Biointerfaces, 94, 304-308 (2012-03-02)

In vitro antiproliferative effects of selenium nanoparticles (nanoSe(0), 10-40 μmol/L) on HeLa (human cervical carcinoma) cells and MDA-MB-231 (human breast carcinoma) cells were examined by optical microscopic inspection and MTT assay in the present study. The nanoSe(0) effectively inhibited the

The inhibitory effect of selenium nanoparticles on protein glycation in vitro.

Shaoxuan Yu et al.

Nanotechnology, 26(14), 145703-145703 (2015-03-19)

Selenium nanoparticles (Se NPs) possess well-known excellent biological activities and low toxicity, and have been employed for numerous applications except as inhibitors to protein glycation. Herein, the present study is carried out to investigate the inhibitory effect of Se NPs

Tropone. Selenium Dioxide Oxidation of 1, 3, 5-Cycloheptatriene.

Radlick P.

The Journal of Organic Chemistry, 29(4), 960-960 (1964)

Polyoxopalladates encapsulating 8-coordinated metal ions, [MO8Pd(II)12L8]n- (M = Sc3+, Mn2+, Fe3+, Co2+, Ni2+, Cu2+, Zn2+, Lu3+; L = PhAsO3(2-), PhPO3(2-), SeO3(2-)).

Maria Barsukova-Stuckart et al.

Inorganic chemistry, 51(24), 13214-13228 (2012-12-01)

A total of 16 discrete polyoxopalladates(II) [MO(8)Pd(II)(12)L(8)](n-), with a metal ion M encapsulated in a cuboid-shaped {Pd(12)O(8)L(8)} cage, have been synthesized: the phenylarsonate-capped series (1) L = PhAsO(3)(2-), M = Sc(3+) (ScPhAs), Mn(2+) (MnPhAs), Fe(3+) (FePhAs), Co(2+) (CoPhAs), Ni(2+) (NiPhAs)

Acute and subacute toxicity of novel biogenic selenium nanoparticles in mice.

Mojtaba Shakibaie et al.

Pharmaceutical biology, 51(1), 58-63 (2012-10-06)

In the present investigation, acute and subacute toxicity of the biogenic Se nanoparticles (Se NPs) has been reported. To characterize the Se NPs produced by a bacterium species and to evaluate their toxicity and impact on clinical chemistry and hematological

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