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LITIY

litiyLITIY (lot. Lithium), Li, elementi khimiyavii guruhi I jadvali elementhoi Mendeleev; raqami at. 3, massai at. 6,941; metalli ishqori. S. 1817 khimiki shved A. Arfvedson kashf kardaast. L. metalli sabuk, narm, yozanda buda, rangi safedi nuqragun dorad; t gud. 180,5°S, t jush. 1317°S, zichiash 534 kg/m3 (20°S). L. dar payvasthoyash yakvalenta ast. Hangomi dar oksigen yo havo sukhtan, oksid (Li2O) hosil mekunad.
L. dar tarkibi nabotot va boftahoi gunoguni odamu hayvonot mavjud ast. Ahamiyati biologii L. purra omukhta nashudaast. Ba sifati doru baze namakhoi on (mas., karbonati litiy, oksibutirati litiy va g.)-ro kor mefarmoyand; onho faoliyati ruhgiro (psikhotropi) dorand. Hususan karbonati litiy (Lithii carbonas) beshtar istifoda megardad. Onro baroi istemol (badi khurok) ruze 3 – 4 marotiba tain mekunand. Voyai doru ba tavri fardi intikhob karda meshavad. Tasiri nomatlubi doruhoi L. dar shakli tremor, hissi khastagi, ataksiya, khoboludi, tashnagi, ishol, ikhtiloli kori dil ba mushohida merasad. Az sababi on ki ionhoi L. ba vositai shiri modar khorij meshavand, imkon dorad dar kudaki sinamak zahroludi ba vujud oyad. Doruhoi L.-ro faqat dukhturi psikhiatr tain mekunad.

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