Paraformaldehyde soluble hauv dab tsi?

Cov txheej txheem:

Paraformaldehyde soluble hauv dab tsi?
Paraformaldehyde soluble hauv dab tsi?

Video: Paraformaldehyde soluble hauv dab tsi?

Video: Paraformaldehyde soluble hauv dab tsi?
Video: Qhia saib yus poj niam kov xov tooj seb nw kov txog yam dab tsi 2024, Lub peb hlis ntuj
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Paraformaldehyde yog me ntsis soluble hauv cawv thiab insoluble hauv ethers, hydrocarbons, thiab carbon tetrachloride. Nws yog txheeb ze insoluble hauv dej txias, tab sis soluble hauv dej kub nrog depolymerization.

YYuav ua li cas koj dissolve paraformaldehyde?

Ntxuav tawm cov ntawv lim hauv dej kais dej ua ntej muab pov tseg, yaug txhua yam uas tau hu rau paraformaldehyde. Dissolve hauv ~ 90% ntawm cov dej deionized, kho pH nrog 1 N HCl los yog 1 N NaOH, ces coj mus rau qhov kawg ntim.

YPuas yog paraformaldehyde soluble hauv chloroform?

Paraformaldehyde yog dawb crystalline khoom tsim los ntawm polymerization ntawm formaldehyde. Nws yog insoluble nyob rau hauv hexane tab sis yooj yim yaj nyob rau hauv butanol, nyob ntawm seb qhov hnyav molecular. … paraformaldehyed yog insoluble hauv hexane. Yog tias koj tab tom nrhiav cov kuab tshuaj siv acetone lossis chloroform.

Vim li cas paraformaldehyde yaj hauv PBS?

Paraformaldehyde yog cov polymer siab, thiab nws cov molecules loj dhau los ua kom yaj hauv dej, cawv lossis lwm yam. Koj muaj rau depolymerize paraformaldehydekom nws "kua" thiab tsim cov formaldehyde (tiag tiag methylene hydrate) tov. Lub depolymerization yog cov tshuaj tiv thaiv ntawm cov polymer nrog dej: hydrolysis.

Vim li cas paraformaldehyde siv los ua tshuaj kho?

Paraformaldehyde ua rau covalent cross-links ntawm molecules, zoo gluing lawv ua ke rau hauv ib qho insoluble meshwork. Yog vim li cas hlwb yuav tsum tau kho ua ntej immunostaining yog heev yooj yim. Koj yuav tsum tau permeabilize hlwb kom tso cai rau cov tshuaj tiv thaiv kom nkag mus rau hauv cov txheej txheem intracellular.

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