Selenium
Iinkcukacha zeMveliso
Iinkcukacha zinikiwe
Umgubo omnyama
Umxholo ≥ 99%
(Ubungakanani bereferensi yesicelo 'ukusetyenziswa kwemveliso')
I-Selenium inee-allomorphs ezine: i-grey hexagonal metallic selenium, ibhlowu kancinane, kunye noxinano oluyi-4.81g/cm³ (20℃ kunye ne-405.2kPa), indawo yokunyibilika ye-220.5℃, indawo yokubila eyi-685℃, enganyibiliki emanzini, ikharbon disulfide kunye ne-ethanofide , i-soluble kwi-asidi ye-sulfuric kunye ne-chloroform;I-red monoclinic yikristale selenium, ukuxinana kwe-4.39g/cm³, indawo yokunyibilika yi-221℃, indawo yokubila engu-685℃, ayinyibiliki emanzini, i-ethanol, inyibilika kancinane kwi-ether, inyibilika kwi-asidi yesulfuric kunye ne-nitric acid;Ukuxinana kweselenium ebomvu eyi-amorphous yi-4.26g/cm³, kwaye ukuxinana kweselenium eglasi emnyama yi-4.28g/cm³.Iguqulwa ibe yi-hexagonal selenium kwi-180℃, kwaye indawo yokubila yi-685℃.Ayinyibiliki emanzini kwaye inyibilika kancinane kwi-carbon disulfide.
I-EVERBRIGHT® 'iya kubonelela ngokulungelelanisiweyo: umxholo/ubumhlophe/ubungakanani besuntswana/PHvalue/umbala/isimbo sokupakisha/ iinkcukacha zokupakisha kunye nezinye iimveliso ezithile ezilungele iimeko zakho zokusebenzisa, kunye nokubonelela ngeesampulu zasimahla.
IParameter yeMveliso
7782-49-2
231-957-4
78.96
Into engeyiyo intsimbi
4.81 g/cm³
Ayinyibiliki emanzini
685℃
220.5°C
Ukusetyenziswa kweMveliso
Ukusetyenziswa kwamashishini
I-Selenium ineepropathi zombane kunye ne-photosensitive.Ukusebenza kwe-Photoelectric kunokuguqula ukukhanya kumbane, kwaye ukusebenza kwe-photosensitive kunokunciphisa ukuxhathisa xa kwandisa ukukhanya.Iimpawu ze-photoelectric kunye ne-photosensitive ze-selenium zingasetyenziselwa ukuveliswa kweefotocell kunye nemitha yokuvezwa kweekhamera kunye neeseli zelanga.I-Selenium inokuguqula i-alternating current ibe yangoku ngokuthe ngqo, ngoko isetyenziswa ngokubanzi ekwenzeni izinto ezihlaziyiweyo.I-Selenium elemental yi-P-type semiconductor enokusetyenziswa kwiisekethe kunye namacandelo e-slid-state.Kwiifotokopi, i-selenium ingasetyenziselwa ukukopisha amaxwebhu kunye neeleta (i-toner cartridges).Kwishishini leglasi, i-selenium ingasetyenziselwa ukuvelisa iglasi ye-decolorized, i-ruby yeglasi enemibala kunye ne-enamel.
Ibakala likaMedical
Khulisa ukhuseleko
I-selenium esebenzayo yesityalo inokucoca i-radicals yamahhala emzimbeni, isuse i-toxins emzimbeni, i-antioxidant, inokuthintela ngokufanelekileyo ukuveliswa kwe-lipid peroxide, ithintele amahlule egazi, isuse i-cholesterol, kwaye iphucule ukusebenza komzimba womntu.
Thintela isifo seswekile
I-Selenium yinto esebenzayo ye-glutathione peroxidase, enokuthintela ukutshatyalaliswa kwe-oxidative yeeseli ze-islet beta, zibenze zisebenze ngokuqhelekileyo, zikhuthaze i-metabolism yeswekile, ukunciphisa iswekile yegazi kunye nomchamo weswekile, kunye nokuphucula iimpawu zezigulane zesifo sikashukela.
Thintela i-cataract
Iretina isesichengeni sokonakala ngenxa yokuchanabeka ngakumbi kwimitha yekhompyutha, iselenium inokukhusela iretina, iphucule ukugqiba komzimba wevitreous, iphucule amehlo, kwaye ithintele urhatyazo.
