American Elements specializes in producing high purity uniform shaped Selenium Pellets with the highest possible density and smallest possible average grain sizes for use in semiconductor, Chemical Vapor Deposition (CVD) and Physical Vapor Deposition (PVD) processes including Thermal and Electron Beam (E-Beam) Evaporation, Low Temperature Organic Evaporation, Atomic Layer Deposition (ALD), Metallic-Organic and Chemical Vapor Deposition (MOCVD). Our standard Pellet sizes range from 1/8" x 1/8" to 1/4" x 1/4" and 3 mm diameter. We can also provide Pellets outside this range for ultra high puritythin film applications, such as fuel cells and solar energy layers. Materials are produced using crystallization, solid state and other ultra high purification processes such as sublimation. American Elements specializes in producing custom compositions for commercial and research applications and for new proprietary technologies. American Elements also casts any of the rare earth metals and most other advanced materials into rod, bar or plate form, as well as other machined shapes and through other processes nanoparticles. See research below. We also produce Selenium as rod, ingot, powder, pieces, disc, granules, wire, and in compound forms, such as oxide. Other shapes are available by request.
Selenium is a Block P, Group 16, Period 4 element. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electronic configuration is [Ar] 3d10 4s2 4p4. In its elemental form selenium's CAS number is 7782-49-2. The selenium atom has a radius of 116.pm and it's Van der Waals radius is 190.pm. The EPA does not classify selenium as carcinogenic, although selenium sulfide is a probable carcinogen. Selenates and selenites which are compounds of selenium, are highly toxic. Hydrogen selenide gas (SeH2) is the most acutely toxic compound of selenium. Selenium exhibits both photovoltaic action, where light is converted directly into electricity, and photoconductive action, where the electrical resistance decreases with increased illumination. of photocells and exposure meters for photographic use, as well as solar cells. Below its melting point, selenium is a p-type semiconductor and has many uses in electronic and solid-state applications. Selenium is available as metal and compounds with purities from 99% to 99.9999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. Selenium was first discovered by Jons Berzelius in 1817. The origin of the name Selenium comes from the Greek word "Selênê" meaning moon. See selenium research below.
PACKAGING SPECIFICATIONS FOR BULK & RESEARCH QUANTITIES
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Material Safety Data Sheet (MSDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes.
Selenoprotein K binds multi-protein complexes and is involved in the regulation of ER homeostasis.
Shchedrina VA, Everley RA, Zhang Y, Gygi SP, Hatfield DL, Gladyshev VN.
J Biol Chem. 2011 Oct 20. [Epub ahead of print]
PMID:
22016385
[PubMed - as supplied by publisher]
Catalytic activity of selenomethionine in removing amino acid, peptide, and protein hydroperoxides.
Suryo Rahmanto A, Davies MJ.
Free Radic Biol Med. 2011 Oct 1. [Epub ahead of print]
PMID:
22015433
[PubMed - as supplied by publisher]
Combination of chemometrically assisted voltammetry, calorimetry, and circular dichroism as a new method for the study of bioinorganic substances: application to selenocystine metal complexes.
Gusmão R, Prohens R, Díaz-Cruz JM, Ariño C, Esteban M.
J Biol Inorg Chem. 2011 Oct 21. [Epub ahead of print]
PMID:
22015398
[PubMed - as supplied by publisher]
Marine and farmed fish on the Polish market: Comparison of the nutritive value and human exposure to PCDD/Fs and other contaminants.
Szlinder-Richert J, Usydus Z, Malesa-Ciecwierz M, Polak-Juszczak L, Ruczynska W.
Chemosphere. 2011 Oct 17. [Epub ahead of print]
PMID:
22014661
[PubMed - as supplied by publisher]
Dietary selenium reduces retention of methyl mercury in freshwater fish.
Bjerregaard P, Fjordside S, Hansen MG, Petrova MB.
Environ Sci Technol. 2011 Oct 20. [Epub ahead of print]
PMID:
22014184
[PubMed - as supplied by publisher]
Plant and fungal food components with potential activity on the development of microbial oral diseases.
Daglia M, Papetti A, Mascherpa D, Grisoli P, Giusto G, Lingström P, Pratten J, Signoretto C, Spratt DA, Wilson M, Zaura E, Gazzani G.
J Biomed Biotechnol. 2011;2011:274578. Epub 2011 Oct 17.
PMID:
22013381
[PubMed - in process]
Selenium, selenoproteins and the thyroid gland: interactions in health and disease.
Schomburg L.
Nat Rev Endocrinol. 2011 Oct 18. doi: 10.1038/nrendo.2011.174. [Epub ahead of print]
PMID:
22009156
[PubMed - as supplied by publisher]
Selenium inhibits migration of murine melanoma cells via down-modulation of IL-18 expression.
Song H, Kim J, Lee HK, Park HJ, Nam J, Park GB, Kim YS, Cho D, Hur DY.
Int Immunopharmacol. 2011 Oct 15. [Epub ahead of print]
PMID:
22008306
[PubMed - as supplied by publisher]
Detection, Identification, and Quantification of Selenoproteins in a Candidate Human Plasma Standard Reference Material.
Ballihaut G, Kilpatrick LE, Davis WC.
Anal Chem. 2011 Oct 18. [Epub ahead of print]
PMID:
22007999
[PubMed - as supplied by publisher]
Severe pre-eclampsia is associated with abnormal trace elements concentrations in maternal and fetal blood.
Katz O, Paz-Tal O, Lazer T, Aricha-Tamir B, Mazor M, Wiznitzer A, Sheiner E.
J Matern Fetal Neonatal Med. 2011 Oct 18. [Epub ahead of print]
PMID:
22007865
[PubMed - as supplied by publisher]
Effects of Selenium Supplements on Cancer Prevention: Meta-analysis of Randomized Controlled Trials.
Lee EH, Myung SK, Jeon YJ, Kim Y, Chang YJ, Ju W, Seo HG, Huh BY.
Nutr Cancer. 2011 Oct 17. [Epub ahead of print]
PMID:
22004275
[PubMed - as supplied by publisher]
Study of the correlation of serum selenium level with Behcet's disease.
Esalatmanesh K, Jamshidi A, Shahram F, Davatchi F, Masoud SA, Soleimani Z, Salesi M, Ghaffarpasand I.
Int J Rheum Dis. 2011 Oct;14(4):375-8. doi: 10.1111/j.1756-185X.2011.01649.x. Epub 2011 Sep 5.
PMID:
22004235
[PubMed - in process]
Multi-metal(loid) methylation in methanoarchaea is linked to central intermediates of methanogenesis.
Thomas F, Diaz-Bone RA, Wuerfel O, Huber B, Weidenbach K, Schmitz RA, Hensel R.
Appl Environ Microbiol. 2011 Oct 14. [Epub ahead of print]
PMID:
22003009
[PubMed - as supplied by publisher]
The Effects of Di(2-Ethylhexyl)Phthalate Exposure and Selenium Nutrition on Sertoli Cell Vimentin Structure and Germ-Cell Apoptosis in Rat Testis.
Erkekoglu P, Zeybek ND, Giray B, Asan E, Hincal F.
Arch Environ Contam Toxicol. 2011 Oct 16. [Epub ahead of print]
PMID:
22002783
[PubMed - as supplied by publisher]
A superoxide anion-scavenger, 1,3-selenazolidin-4-one suppresses serum deprivation-induced apoptosis in PC12 cells by activating MAP kinase.
Nishina A, Kimura H, Kozawa K, Sommen G, Nakamura T, Heimgartner H, Koketsu M, Furukawa S.
Toxicol Appl Pharmacol. 2011 Oct 2. [Epub ahead of print]
PMID:
22001386
[PubMed - as supplied by publisher]
Nutrition, dietary supplements and adenocarcinoma of the prostate.
Schultz C, Meier M, Schmid HP.
Maturitas. 2011 Oct 12. [Epub ahead of print]
PMID:
22001108
[PubMed - as supplied by publisher]
Interactions of Cu(I) with Selenium-Containing Amino Acids Determined by NMR, XAS, and DFT Studies.
Wang HC, Riahi M, Pothen J, Bayse CA, Riggs-Gelasco P, Brumaghim JL.
Inorg Chem. 2011 Oct 14. [Epub ahead of print]
PMID:
21999616
[PubMed - as supplied by publisher]
Effects of Basal Media and Supplements on Diethylstilbestrol-Treated Immature Mouse Primary Granulosa Cell Growth and Regulation of Steroidogenesis In Vitro.
Ding T, Luo A, Yang S, Lai Z, Wang Y, Shen W, Jiang J, Lu Y, Ma D, Wang S.
Reprod Domest Anim. 2011 Oct 15. doi: 10.1111/j.1439-0531.2011.01879.x. [Epub ahead of print]
PMID:
21999365
[PubMed - as supplied by publisher]
Demographic and lifestyle factors and selenium levels in men and women in the U.S.
Park K, Rimm E, Siscovick D, Spiegelman D, Morris JS, Mozaffarian D.
Nutr Res Pract. 2011 Aug;5(4):357-64. Epub 2011 Aug 31.
PMID:
21994531
[PubMed - in process]
New group 11 complexes with metal-selenium bonds of methyldiphenylphosphane selenide: a solid state, solution and theoretical investigation.
Pop A, Silvestru A, Gimeno MC, Laguna A, Kulcsar M, Arca M, Lippolis V, Pintus A.
Dalton Trans. 2011 Oct 13. [Epub ahead of print]
PMID:
21993712
[PubMed - as supplied by publisher]
and smallest possible average grain sizes for use in semiconductor, Chemical Vapor Deposition (CVD) and Physical Vapor Deposition (PVD) processes including Thermal and Electron Beam (E-Beam) Evaporation, Low Temperature Organic Evaporation, Atomic Layer Deposition (ALD), Metallic-Organic and Chemical Vapor Deposition (MOCVD). Our standard Pellet sizes range from 1/8" x 1/8" to 1/4" x 1/4" and 3 mm diameter. We can also provide Pellets outside this range for ultra high purity thin film applications, such as fuel cells and solar energy layers. Materials are produced using crystallization, solid state and other ultra high purification processes such as sublimation. American Elements specializes in producing custom compositions for commercial and research applications and for new proprietary technologies. American Elements also casts any of the rare earth metals and most other advanced materials into rod, bar or plate form, as well as other machined shapes and through other processes nanoparticles. See research below. We also produce Selenium as rod, ingot, powder, pieces, disc, granules, wire, and in compound forms, such as oxide. Other shapes are available by request.
Selenium is a Block P, Group 16, Period 4 element. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electronic configuration is [Ar] 3d10 4s2 4p4. In its elemental form selenium's CAS number is 7782-49-2. The selenium atom has a radius of 116.pm and it's Van der Waals radius is 190.pm. The EPA does not classify selenium as carcinogenic, although selenium sulfide 
is a probable carcinogen. Selenates and selenites which are compounds of selenium, are highly toxic. Hydrogen selenide gas (SeH2) is the most acutely toxic compound of selenium. Selenium exhibits both photovoltaic action, where light is converted directly into electricity, and photoconductive action, where the electrical resistance decreases with increased illumination. of photocells and exposure meters for photographic use, as 
well as solar cells. Below its melting point, selenium is a p-type semiconductor and has many uses in electronic and solid-state applications. Selenium is available as metal and compounds with purities from 99% to 99.9999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. Selenium was first discovered by Jons Berzelius in 1817. The origin of the name Selenium comes from the Greek word "Selênê" meaning moon. See selenium research below.
