Xov xwm
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Lub luag haujlwm ntawm sodium isethionate yog dab tsi?
Sodium isethionate yog ib qho ntsev organic uas yog ib qho tseem ceeb hauv cov tshuaj, tshuaj pleev ib ce thiab cov tshuaj siv niaj hnub. Sodium isethionate lwm lub npe hu ua isethionic acid sodium ntsev, cas 1562-00-1. Sodium isethionate ua rau cov mis ruaj khov dua, txhim kho kev tiv thaiv ntawm cov dej tawv...Nyeem ntxiv -
glycolic acid ua dab tsi rau koj daim tawv nqaij
Glycolic acid yog dab tsi? Glycolic acid, tseem hu ua hydroxyacetic acid, yog ib qho alpha-hydroxyl acid tsis muaj xim, tsis muaj ntxhiab uas feem ntau muab los ntawm qab zib. Tus lej Cas yog 79-14-1 thiab nws cov mis tshuaj yog C2H4O3. Glycolic acid kuj tseem tuaj yeem tsim tau. Glycolic acid yog suav tias yog ib qho hygroscop...Nyeem ntxiv -
Polyglyceryl-4 oleate yog dab tsi?
Muaj ntau tus neeg siv khoom pom qee cov tshuaj pleev ib ce uas muaj "polyglyceryl-4 oleate" cov tshuaj no, tsis meej txog qhov ua tau zoo thiab kev ua haujlwm ntawm cov tshuaj no, xav nkag siab txog cov khoom uas muaj polyglyceryl-4 oleate zoo. Tsab xov xwm no qhia txog qhov ua tau zoo, kev ua haujlwm thiab cov txiaj ntsig ntawm polyglyceryl-4...Nyeem ntxiv -
Cov khoom xyaw nquag hauv tshuaj pleev thaiv hnub yog dab tsi?
Kev tiv thaiv hnub yog qhov yuav tsum muaj rau cov poj niam niaj hnub no thoob plaws hauv ib xyoos. Kev tiv thaiv hnub tsis yog tsuas yog txo qhov kev puas tsuaj ntawm cov duab ultraviolet rau ntawm daim tawv nqaij xwb, tab sis kuj tiv thaiv kev laus ntawm daim tawv nqaij thiab cov kab mob ntawm daim tawv nqaij. Cov khoom xyaw ntawm cov tshuaj pleev thaiv hnub feem ntau yog ua los ntawm cov khoom siv lub cev, tshuaj lom neeg, lossis sib xyaw ntawm ob hom thiab p...Nyeem ntxiv -
Yuav ua li cas tiv thaiv koj tus kheej ntawm lub hnub thaum lub caij ntuj sov
Lub caij ntuj sov no, lub hnub raug thiab kub heev tuaj txog tsis tau xav txog, taug kev ntawm txoj kev, ntau tus neeg hnav khaub ncaws tiv thaiv hnub, kaus mom tiv thaiv hnub, kaus mom, thiab tsom iav dub. Kev tiv thaiv hnub yog ib qho uas tsis tuaj yeem zam tau thaum lub caij ntuj sov, qhov tseeb, kev raug hnub tsis yog tsuas yog ua rau tawv nqaij tawv, kub hnyiab, tab sis kuj ua rau daim tawv nqaij laus, th...Nyeem ntxiv -
Dab tsi yog silica dimethyl silylate
Silica dimethyl silylate yog ib hom seaweed calcified lub cev thaum ub, yog ib hom khoom siv ntuj tsim. Nws muaj kev nyab xeeb thiab tsis muaj tshuaj lom, thiab muaj peev xwm adsorption muaj zog ntawm nws tus kheej, uas tuaj yeem "nqus" cov pa phem hauv, rhuav tshem lawv mus rau hauv cov pa roj carbon dioxide tsis muaj teeb meem rau tib neeg lub cev, thiab ...Nyeem ntxiv -
Zoo siab hnub Tsib Hlis
Txhua xyoo "Hnub Tsib Hlis" tau los txog ntsiag to. Hauv txhua lub ces kaum ntawm lub teb chaws cov neeg ua haujlwm nrog ob txhais tes los txhais lub luag haujlwm, nrog lub xub pwg nyom los txhawb lub luag haujlwm, nrog lub siab xav sau kev mob siab rau, nrog hws los piav qhia txog lub neej, ua tsaug rau peb nyob ib puag ncig cov neeg tsis paub, th...Nyeem ntxiv -
benzophenone-4 siv rau kev saib xyuas tawv nqaij li cas
Tam sim no tib neeg muaj ntau txoj kev xaiv hauv kev saib xyuas daim tawv nqaij, tsuas yog cov khoom xyaw tshuaj pleev thaiv hnub muaj ntau dua 10 hom, tab sis qee cov khoom saib xyuas daim tawv nqaij zoo li kev saib xyuas daim tawv nqaij ntau dua yuav ua rau peb daim tawv nqaij mob. Yog li peb yuav xaiv cov khoom saib xyuas daim tawv nqaij kom raug rau peb daim tawv nqaij li cas? Cia peb tham txog benzophenone-4, ib qho tseem ceeb i...Nyeem ntxiv -
PCA Na yog dab tsi?
Nrog rau kev txhim kho ntawm kev tshawb fawb niaj hnub thiab thev naus laus zis thiab kev txhim kho ntawm tib neeg lub neej, nws zoo li qhov yuav tsum tau ua rau cov khoom siv kho kom zoo nkauj tau nce siab dua, thiab cov tshuaj pleev ib ce uas muaj cov khoom xyaw ntuj tau dhau los ua neeg nyiam dua nrog txhua tus. Tod...Nyeem ntxiv -
3-O-Ethyl-L-ascorbic acid zoo rau dab tsi?
3-O-Ethyl-L-ascorbic acid muaj ob yam khoom zoo li roj hydrophilic thiab ruaj khov heev hauv kev tshuaj lom neeg. 3-O-Ethyl-L-ascorbic acid, tus lej cas 86404-04-8, muaj cov khoom oleophilic thiab hydrophilic ua cov vitamin C derivative, uas nthuav dav nws qhov kev siv, tshwj xeeb tshaj yog hauv kev siv tshuaj txhua hnub...Nyeem ntxiv -
Glycyrrhizic Acid Ammonium Salt yog dab tsi?
Glycyrrhizic acid ammonium ntsev, dawb siv lead ua los yog crystalline hmoov, muaj qhov qab zib heev, 50 txog 100 npaug qab zib li sucrose. Melting point 208 ~ 212 ℃. Yaj hauv ammonia, tsis yaj hauv glacial acetic acid. Glycyrrhizic acid ammonium ntsev muaj qhov qab zib heev thiab yog li 200 npaug qab zib...Nyeem ntxiv -
Polyethylenimine siv rau dab tsi
Polyethylenimine (PEI) yog ib qho polymer uas yaj tau hauv dej. Qhov concentration hauv dej ntawm cov khoom lag luam feem ntau yog 20% txog 50%. PEI yog polymerized los ntawm ethylene imide monomer. Nws yog ib qho cationic polymer uas feem ntau tshwm sim ua kua lossis khoom khov tsis muaj xim lossis daj nrog ntau yam molecular hnyav thiab ...Nyeem ntxiv