Ilm

USLUBShINOSI, yak shokhai filologiya, ki sistemai uslubhoi (nigared Uslub) zabon va qonuniyati istifodai vositahoi bayonro meomuzad. Uslubshinosi bo grammatikai normativi, leksikologiya, frazeologiya, orfoepiya robitai qavi dorad, vale az jihati vazifa va usuli tadqiq az onho farq mekunad. Uslubshinosi ahamiyati amali dorad: vay mahorati sukhanvariro omuzonda, ba zabon oqilona munosibat kardani …

USTURLOB (muarrabi astrolyabiya), olatest, ki ba vositai on dar rasadkhonaho gardishi sitorahoro mushohida mekunand va meomuzand.  

URAN (yunoni uranos — ocmon, khudoi osmon), sayyorai haftum (az rui masofa to Oftob) va kalontarini sistemai Oftob; alomati astronomiash … yo … Soli 1781 Uranro V. Gershel kashf namudaast. Dar girdi Oftob az rui madori davrashakl harakat mekuyaad. Masofai on to Oftob ba hisobi miyona ba 2871 mln km …

URANINIT, mineral, oksidi beobi uran. Formulai idealiash UO2. Hamai uraninithoi tabii gayr az UO2 in- chunin UO3 dorand. Sistemai kristalibandiash kubi. Ba shakli kub, oktaedr va massahoi zich duchor meoyad. Murt. Sakhtiash 5—6, zichiash 8— 10 g/sm3 (az oni nasturan 6—9,2 g/ am3). Rangash siyohi jilodor. Nihoyat radioaktivist. Navhoi uraninit: …

URAN (lotini uranium), U, elementi khimiyavii radioaktiv az guruhi III sistemai davrii Mendeleev, mansubi alginoidho; raqami atomi 92, massai atomi 238,029; metall. Uranii tabii az omekhtai 3 izotop 238U — 99,2739% (davrai nimkohishash T1/2 = 4,51-108 sol), 235U —0,7024% (T1/2 = 7,43· 108 sol) va 41 —264U 0,0057% (T1/2 =2,48-105 …

UVOLOGIYa (az lotini uva — angur va …logiya)} ilmest oid ba sokhti khusha va gujbi angur.

TUKhMIShINOSI, yak sohai agronomiyaro guyand, ki sokhtu inkishofi tukhmi ziroati khojagii qishloqro omukhta, usulhoi bahodihi va nazorati tukhmro ba vujud meorad. Tukhmishinosi ba karpologiya aloqamand ast.

TETA-FUNKSIYa, funksiyahoi butunro guyand, ki nisbatashon funksiyahoi ellipsiro memonad.

TYuRINGIT, yak nav minerali sabztob («az guruhi leptokhloritho) (Ge2+, Ge3+)z [AI2Si2O10] (ON)2 · (Mg, Ge)3(ON)6. Sakhtiash 2—2,5; zichiash 3,15—3,20 g/sm3. Asosan dar konhoi tahshinii madani ohan vomekhurad. Konhoi kaloni Tyuringit dar Tyuringiya (RDG) va kolkhozhoi Quramai Tojikiston mavjudand.

TULI OSMONI, nigared Koordinatahoi osmoni.