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TRIAS

trias

TRIAS, davrai (sistemai) trias (yunoni trias—saqisma, seqabata), davrai avvalini erai mezozoy, ki 230 mln sol muqaddam sar shuda, qarib 35 mln sol davom kardaast. Istilohi «trias»-ro soli 1834 olimi nemis F. Alberti ba ilm dokhil namud. Davrai trias ba zamonhoi avval, miyona va okhir, sistemai trias boshad, ba qismhoi poyon, miyona va bolo taqsim meshavad. Iqlimi trias khele garm, nimai yakumi davra khushk va nimai duyumash serborish bud. Dar davomi davra olami organiki ba kulli tagyir yoft. Dar bahrho bemuhraho (ammonoideyaho, pelesilodaho, gastropodaho) bisyor budand; avvalin belemnitho va mohihoi ustukhondor paydo shudand. Dinozavrho — khazandahoi kalonjussa khele inkishof yofta, nakhustin shirkhuron (tukhmguzorho va sumdorho) ba vujud omadand. Olami nabototi trias asosan az sarakhsho, sikadofitho, ginkoho va suzanbargho iborat bud. Sarvathoi zerizaminii trias: angisht, neft, almos, uran, madanhoi misu nikel va gayra. Tahnishasthoi davrai trias dar Pomir va Tojikistoni Markazi mavjudand.

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saharoza

SAKhAROZA

SAKhAROZA, qandi nayshakar yo lablabu, yake az muhimtarin disakharidhost, ki dar hamai rastanihoi fotosintezkunanda mavjud …