Таджикистан – Энциклопедия на таджикском языке КИТОБАМ

Payvasthoi organikii silisiy, payvasthoi khimiyavie, ki dar molekulaashon bandi silisiy- karbon (Si—S) dorand. Payvasthoi organikii silisiy ba guruhhoi zerin chudo meshavand; 1) organogalogensilnho yo alkil (aril) galogenenlanho RnSiX4_u; organogidridgalogensilanho RnSiHmX4(n + sh) (X —aksar vaqt Cl); organoasioksisilanho RnSi(0R/)4_n; organoasiloksisilanho RnSii(OCOR,)4_n; organoaminosilanho RnSi(NH2)4_n. 2) Organosilanho RnSi>H4_n. 3) Organosiloksanho R3SiOSiR3, R3SiOSi (R2)OSiR3 …

Payrav (takhallus; nom va familiyaash Otajon Sulaymoni; 15. 4. 1899, Bukhoro — 9. 6. 1933. Samarqand), shoiri sovetii tojik. Az oilai savdogari kalon. To soli 1911 dar .maktabi ibtidoii Bukho­ro, solhoi 1911—14 dar madrasai for­sii Marv khonda, az soli 1914 to 1916 dar nazdi muallimoni khususi za­boni rusi omukhta, az …

Payvasthoi organikii fosfor, payvasthoi khimiyavie, ki dar molekulaashon bandi R—S dorand; in payvastho az payvasthoi doroi bandi R—E—S (E—geteroatom, masalan, oksigen, nitrogen, sulfur) farq mekunand. P. o. f. az ruy miqdori ban­di R—S yak (RPH2), du (R2PH) va se- chalda (R3P) meshavand (R — boqimondan organiki). Usulhoi asosii hosil kardani …

Payravi Sovaji Amirbek (soli tavallud va vafot nomalum), shoiri asri 16 fors-tojik. Payravi Sovaji az mardumi shahri Sovai Eron buda, pas az kasbi kamol ba Hinduston raft va dar on jo zindgivu ejod kardaast. Zohiran, bo darbori khukmroni davr — Anbar robitae dosht. Muvofiqi malumoti tazkiraho Payravii Sovaji gazalsaroi bomahorate …

Payvasthoi organikii ftor, payvasthoi khimiyavie, ki dar molekulaashon yak yo yakchand bandi F—S dorand. Khimiyam Payvasthoi organikii ftor solhoi 50 asri 20 hamroqahi bo taraqqiyoti sanoati atomi inkishof yoft. Payvasthoi organikii fosforro bo usulhoi zerin sin­tez mekunand: 1) Ftoropi va yo ba bandi duchanda payvast kardavi ftor. -SN+Gg-*-—CF+.HF / / …