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KOBALT

cobaltKOBALT (Cobaltum), Co, elementi khimiyavii guruhi VIII sistemai davrii Mendeleev, raqami at. 27, massai at. 58,933. K. dar tabiat yak izotopi sobit 59Co dorad. K.-i metalliro s. 1735 khimiki shved G. Brandt kashf kardaast.
K. metalli vaznini nuqrarang buda, kame tobishi surkh dorad. t gud. 1493°S, t jush. 3100°S, zichiash 8900 kg/m3. Dar harorati muqarrari ba tasiri obu havo ustuvor meboshad.
Payvasthoi K. dar Misri Qadim, CHin baroi istehsoli rangi kabud, shishahoi rangin, sir (emal) istifoda meshudand. Holo K.-ro dar sanoat asosan dar shakli khulaho baroi istehsoli masolehi ba otash tobovar, magnithoi doimi, asbobhoi buranda, shisha, rangubor va g. istifoda mebarand.
Izotopi radioaktivi sunii 60Co-ro baroi muolijai varam, tamyizi doruvor, nest kardani hasharoti galladona, sabzavot va der nigoh doshtani khurokvori va g. istifoda mebarand.
K. dar organizmi odam, hayvonot va rastani mikroelementi zaruri meboshad. K. faoliyati fermenthoro metezonad; dar mubodilai safeda, karbogidrat va charbu, sintezi kislotahoi nukleat, reaksiyahoi oksidu barqarorshavi va tavlidi khun dar organizm roli kalon mebozad. Organizm K.-ro az tarkibi khurokvori megirad. Baze doruhoi dar asosi K. tayyorkarda baroi muolijai anemiya (kamkhuni) istifoda meshavand.
Az khurokvoriho nakhud, lablabu, panir va jigari gov K.-i bisyor dorad. K. yake az mikroelementhoi muhim meboshad. Vay dar organizm bo safedaho va aminokislotaho payvast ast; dar tarkibi vitamini V12 dokhil meshavad. K. fermenthoro faol sokhta, ba hosilshavii safedahoi mushak, khun va assimilyatsiyai nitrogen taqviyat mebakhshad, faoliyati gemolizii khunro baland mebardorad. Hangomi dar organizm narasidani K. gipo- yo avitaminozi V12 rukh menamoyad.
Dar asnoi ba organizm tasir rasondani payvasthoi K. mumkin ast zahroludii shadid yo muzmin ba vujud oyad. Hususan payvasthoi halshavandai K. zahrnok meboshand. Bo maqsadi peshgirii zahroludi az K. ba qoidahoi hifzi salomati dar istehsolot qati rioya kardan lozim ast (boyad bo libosi makhsus, az jumla odamone, ki bo payvasthoi K. sarukor dorand, boyad mudom az nazorati tibbi guzarand.

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