Selenium
Nkọwa ngwaahịa
Enyere nkọwapụta
Black ntụ ntụ
Ọdịnaya ≥ 99%
(Oghere akwụkwọ ntụaka ngwa 'eji ngwaahịa')
Selenium nwere allomorphs anọ: selenium hexagonal ọla ọcha, obere acha anụnụ anụnụ, nwere njupụta nke 4.81g / cm³ (20 ℃ na 405.2kPa), ebe agbaze nke 220.5 ℃, isi mmiri nke 685 ℃, enweghị ike ịsọpụrụ na mmiri, carbon disulfide na ethanol. , soluble na sulfuric acid na chloroform;Selenium kristal monoclinic na-acha uhie uhie, njupụta ikwu bụ 4.39g / cm³, ebe agbaze 221 ℃, ebe esi esi 685 ℃, enweghị ike ịsọpụrụ na mmiri, ethanol, soluble na ether, soluble na sulfuric acid na nitric acid;Njupụta nke selenium amorphous uhie bụ 4.26g/cm³, yana njupụta nke selenium enyo ojii bụ 4.28g/cm³.A na-atụgharị ya ka ọ bụrụ selenium hexagonal na 180 ℃, ebe isi ya bụ 685 ℃.Ọ na-esighi ike na mmiri ma na-agbaze ntakịrị na carbon disulfide.
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Usoro ngwaahịa
7782-49-2
231-957-4
78.96
Ihe na-abụghị ọla
4.81g/cm³
Na-adịghị edozi na mmiri
685℃
220.5C
Iji ngwaahịa
Ojiji ụlọ ọrụ
Selenium nwere ma photoelectric na photosensitive Njirimara.Ọrụ fotoelectric nwere ike ịtụgharị ọkụ ozugbo ka ọ bụrụ ọkụ eletrik, yana arụmọrụ foto nwere ike ibelata nguzogide mgbe ọkụ na-abawanye.Enwere ike iji ihe fotoelectric na fotosenitive nke selenium mee ihe na mmepụta nke photocells na mita mkpughe maka igwefoto na sel anyanwụ.Selenium nwere ike ịtụgharị ugbu a na-agbanwe agbanwe ka ọ bụrụ ugbu a ozugbo, yabụ a na-eji ya eme ihe n'ichepụta ihe ndozi.Selenium elemental bụ semiconductor ụdị P nke enwere ike iji na sekit na ihe ndị siri ike.Na ntugharị foto, enwere ike iji selenium iji detuo akwụkwọ na akwụkwọ ozi (cartridges toner).N'ime ụlọ ọrụ iko, enwere ike iji selenium mepụta iko agba agba, iko ruby na enamel.
Ọkwa ahụike
Na-akwalite ọgụ
Selenium na-arụ ọrụ nke osisi nwere ike ikpochapụ radicals n'efu n'ime ahụ, wepụ nsị n'ime ahụ, antioxidant, nwere ike igbochi mmepụta nke lipid peroxide nke ọma, gbochie mkpụkọ ọbara, wepụ cholesterol, ma welie ọrụ nchebe mmadụ.
Gbochie ọrịa shuga
Selenium bụ ihe na-arụsi ọrụ ike nke glutathione peroxidase, nke nwere ike igbochi mbibi oxidative nke mkpụrụ ndụ beta nke agwaetiti, mee ka ha na-arụ ọrụ nke ọma, na-akwalite metabolism shuga, belata shuga ọbara na shuga mmamịrị, ma melite mgbaàmà nke ndị ọrịa shuga.
Gbochie cataract
A na-enwe ike imebi retina n'ihi mgbasawanye nke radieshon kọmputa, selenium nwere ike ichekwa retina, kwalite njedebe nke ahụ vitreous, mee ka anya dịkwuo mma, gbochie cataracts.
