2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov tshuaj tiv thaiv ntawm ib qho amine thiab formaldehyde ua raws li kev txo qis amination tuaj yeem tsim ib qho tshuaj methylated amine. Ib qho tertiary amine feem ntau yog cov khoom ntawm cov tshuaj tiv thaiv yog tias siv formaldehyde ntau dhau. Cov txheej txheem rau kev sib txuas yog tib yam li saum toj no.
Yam khoom twg koj xav kom tau txais los ntawm kev txo qis ntawm aldehyde siv NH3 ?
Qhov ncaj qha txo qis amination ntawm carbonyl tebchaw nrog NH3 thiab H2 yog lwm txoj hauv kev los tsim primary amines hauv kev tsim tawm.
Tus neeg sawv cev txo qis hauv kev txo qis yog dab tsi?
Sodium triacetoxyborohydride yog ib qho dav dav, me me, thiab xaiv txo tus neeg sawv cev rau kev txo qis ntawm ntau yam aldehydes thiab ketones. 1, 2-Dichloroethane (DCE) yog qhov nyiam cov tshuaj tiv thaiv hnyav, tab sis cov tshuaj tiv thaiv kuj tuaj yeem nqa tawm hauv tetrahydrofuran thiab qee zaus hauv acetonitrile.
Yuav ua li cas thiaj txo tau amination?
Kev txo qis yuav suav nrog tus txheej txheem ib-lossis ob-kauj ruam uas muaj amine thiab carbonyl compound condense kom them tau ib qho imine lossis iminium ion uas txo qis hauv qhov chaw lossis tom qab tsim cov khoom lag luam amine.
Amination yog dab tsi?
Amination yog txheej txheem uas ib pawg amine tau nkag mus rau hauv cov organic molecule. … Hom tshuaj tiv thaiv no yog ib qho tseem ceeb vim hais tias organonitrogen tebchaw yogpervasive.
Pom zoo:
Kev tsov rog ntawm kev txom nyem puas txo qis kev txom nyem?
Nyob rau xyoo caum tom qab xyoo 1964 qhia txog kev ua tsov ua rog ntawm kev txom nyem, cov neeg txom nyem hauv Teb Chaws Asmeskas tau nqis mus rau qhov qis tshaj plaws txij li cov ntaub ntawv nthuav dav tau pib xyoo 1958: los ntawm 17.3% hauv lub xyoo Txoj Cai Kev Lag Luam Kev Lag Luam tau siv rau 11.
Qhov twg hauv qab no txiav txim siab txog cov luag haujlwm ntawm cov neeg muag khoom / tus nqi qis thiab cov neeg yuav khoom / tus neeg xauj tsev?
Cov luag haujlwm ntawm cov neeg muag khoom / tus neeg xauj tsev thiab cov neeg yuav khoom / tus neeg xauj tsev yog txiav txim siab los ntawm (1) nqe lus uas ob tog tau teev tseg hauv kev cog lus, (2) kev cai, thiab (3) cov cai teev tseg los ntawm Uniform Commercial Code (UCC).
Cov ntaub ntawv hom twg raug zam los ntawm kev txo qis thiab kev cais tawm?
Cov lus qhia txo qis yuav tsum tsis txhob siv rau cov ntaub ntawv uas muaj tsoomfwv cov ntaub ntawv txawv teb chaws lossis Cov Ntaub Ntawv Txwv lossis Cov Ntaub Ntawv txwv yav dhau los. Txhua daim ntawv teev npe yuav tsum qhia kom meej raws li qhov ua tau, cov ntaub ntawv twg hauv nws tau muab cais tawm thiab qib twg.
Vim li cas qis qis qis qis tv ma?
qis qis yog rated R rau lus, kev nruj kev tsiv, duab liab qab, thiab gore. Vim li cas thiaj pom TV-Ma? Ntshav, kev sib ntaus sib tua ua phem muaj kev txiav plaub hau, stabbing, maulings, thiab lwm yam xwm txheej phem. Riam phom muaj xws li axes, rakes, bludgeons, ropes, aub qus, thiab lwm yam.
Puas yog kev nco qab los ntawm kev txo qis?
Kev nco qab-raws li kev ntxhov siab txo qis (MBSR) yog yim-lub limtiam pov thawj-raws li kev pabcuamuas muaj kev cob qhia secular, mob siab rau los pab cov neeg muaj kev ntxhov siab, ntxhov siab, kev nyuaj siab thiab mob. … Qhov kev pab cuam MBSR tau piav qhia meej hauv Kabat-Zinn phau ntawv xyoo 1990 Full Catastrophe Living.
