2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Racemic mixs feem ntau tsim thaum cov tshuaj achiral hloov mus ua chiral ones. Qhov no yog vim lub fact tias chirality tsuas yog txawv nyob rau hauv ib tug chiral ib puag ncig. Cov tshuaj achiral nyob rau hauv ib puag ncig achiral tsis nyiam los tsim ib qho enantiomer dua lwm tus.
Yam kev sib tw ua li cas?
Racemization tshwm sim thaum ib daim ntawv ntshiab ntawm tus enantiomer hloov mus rau hauv qhov sib npaug ntawm ob qho tib si enantiomers, tsim ib haiv neeg. Thaum muaj ob tus lej sib npaug ntawm dextrorotating thiab levorotating molecules, qhov kev sib hloov kho qhov muag ntawm tus racemate yog xoom.
Yuav ua li cas koj thiaj paub yog molecule yog haiv neeg?
- A cov tshuaj uas muaj qhov sib npaug ntawm (R)-2-butanol thiab (S)-2-butanol yog cov sib tov sib xyaw.
- Ib qho tshuaj uas muaj ntau tshaj ntawm (R)-enantiomer los yog (S)-enantiomer yuav enantioenriched.
- Ib qho tshuaj uas tsuas muaj (R)-enantiomer lossis (S)-enantiomer yuav yog enantiomerically ntshiab.
Puas yog haiv neeg sib xyaw ib txwm 50 50?
A racemic mix is a 50:50 mix of two enantiomers. Vim tias lawv yog cov duab iav, txhua tus enantiomer tig lub dav hlau-polarized lub teeb nyob rau hauv ib qho sib npaug tab sis rov qab kev taw qhia thiab yog optically inactive.
Kev sib cais ntawm haiv neeg sib cais li cas?
Ib haiv neeg sib xyaw yog 50:50 sib xyaw ntawm ob enantiomers. … Chromatography kuj siv tau los cais cov haiv neeg sib txawv. Sivchiral kem chromatography lossis roj chromatography, chiral nyob ruaj khov theem uas tsuas yog khi rau R lossis S kev lees paub yog siv los cais ib qho kev lees paub.
Pom zoo:
Thaum twg tsis pom kev tshwm sim hauv kev sim tshuaj?
Kev tsis pom kev tshwm sim thaum 'dig muag' raug tshem tawm, thiab cov neeg tshawb nrhiav thiab/lossis cov neeg koom tau raug ceeb toom tias qhov kev kho mob twg tus neeg koom tau txais. Kev tsis pom kev txhais li cas hauv kev sim tshuaj?
Thaum twg pfizer tshwm sim tshwm sim?
Qee yam tshwm sim tshwm sim txoj cai tom qab koj txhaj tshuaj, zoo li mob me me hauv koj txhais caj npab. Lwm tus yuav siv sij hawm ntau teev los txhim kho. Nco ntsoov tias nrog ob koob tshuaj tiv thaiv zoo li Pfizer-BioNTech thiab Moderna, koj tuaj yeem pom muaj kev phiv ntau dua tom qab txhaj tshuaj thib ob.
Thaum twg qhov kev rov tshwm sim tshwm sim?
Thaum Replevin tuaj yeem thov Li no, qhov no yog qhov xwm txheej tshwm sim ntau tshaj plaws uas yuav tshwm sim thaum tus neeg siv khoom tsis raug them nyiaj qiv tsheb. Kev ua txhaum cai ntawm kev thaj yeeb nyab xeeb yog me ntsis luv luv. Nws tsis suav nrog kev txeeb tsheb yam tsis tau ceeb toom lossis kub xov tooj kom tsav tsheb mus.
Qhov kev tshwm sim hauv lub neej tseem ceeb ntawm kev ntsuas kev ntsuas kev sib raug zoo twg muaj tus lej ntau tshaj?
Qhov kev tshwm sim ntawm qib siab tshaj yog tuag ntawm tus txij nkawm(nrog tus nqi nruab nrab ntawm 100), txheeb ze rau kev sib yuav, nrog tus nqi nruab nrab ntawm 50, thiab, piv txwv, kev tuag ntawm tus phooj ywg ze, uas tau qhab nia 37. Qhov xwm txheej tseem ceeb ntawm lub neej ntawm Kev Hloov Kho Kev Ntsuas Kev Ntsuas Qhov Ntsuas puas muaj cov lej hloov pauv lub neej ntau tshaj?
Thaum qhov no yog qhov tshwm sim uas tshwm sim?
Lub hauv paus ntsiab lus ntawm kev mob Nrog qhov tshwm sim (uppada) ntawm qhov no, qhov tshwm sim. Thaum tsis muaj qhov no, qhov ntawd tsis tuaj. Nrog lub cessation (nirodha) ntawm no, uas ceases. - Samyutta Nikaya 12.61. Thaum qhov no yog qhov tshwm sim uas tshwm sim qhov tshwm sim uas tshwm sim thaum qhov no tsis yog qhov tsis yog qhov kev txiav txim siab tsis piav qhia?
