Ib. Taw qhia rau Arbutin
Arbutin, feem ntau hu ua arbutin thiab arbutin, yog monoglucose daim ntawv ntawm hydroquinone, uas muaj nyob rau hauv nplooj ntawm Rosaceae pears thiab Rhododendron bearberry nroj tsuag. Arbutin yog cov khoom muaj txiaj ntsig zoo nrog kev ua haujlwm lom neeg zoo hauv cov nroj tsuag, yog li nws kuj tau dhau los ua ib qho ntawm cov khoom siv raw hauv cov tshuaj pleev ib ce loj hauv tsev thiab txawv teb chaws. Raws li cov lus qhia sib txawv ntawm glycosidic bonds, arbutin tuaj yeem muab faib ua β-arbutin thiab α-arbutin. Cov qauv molecular ntawm ob yog tib yam, cov qauv spatial sib txawv, thiab cov lus qhia ntawm glycosidic bonds yog qhov sib txawv.
二. Arbutinproduction txoj kev
Cov txheej txheem tsim khoom ntawm α-arbutin tau txais los ntawm kev hloov pauv suab thaj los ntawm microbial enzymes, thiab nws txoj kev ruaj ntseg, kev ua tau zoo thiab kev nyab xeeb zoo dua li β-arbutin, thiab cov nyhuv tu tawv nqaij yog 10 npaug ntawm beta. Nws tau dav siv los ntawm ntau lub npe tshuaj pleev ib ce hauv ntiaj teb.
︉. Lub hom phiaj tseem ceeb ntawm arbutin
β-Arbutin thiab α-Arbutin feem ntau yog siv hauv kev lag luam tshuaj pleev ib ce. Lawv tuaj yeem tsim rau hauv cov tshuaj pleev lossis emulsions thiab ntxiv rau cov khoom tu tawv nqaij xws li tshuaj pleev, tshuaj pleev, tshuaj pleev, thiab daim npog qhov ncauj.
四. β-Arbutin VS α-Arbutin
1) Qhov sib txawv ntawm kev ruaj ntseg: α-arbutin yuav tsis decompose ntawm qhov kub ntawm 100 °; β-arbutin yuav decompose me ntsis thaum nws tshaj 60 °. Nyob rau hauv cov xwm txheej ntawm pH=5.2-8.0, tsis muaj decomposition hauv α-arbutin tov, tab sis beta-arbutin decomposed. Yog li tag nrho, Alpha zoo dua Beta rau kev ruaj ntseg.
2) Lub cev thiab tshuaj lom neeg ntawm α-arbutin thiab β-arbutin yog qhov zoo sib xws. Lawv yog cov epimers ntawm ib leeg, tab sis lawv cov kev sib hloov kho qhov muag txawv heev. Tus nqi ntawm α-arbutin yog qhov zoo (+174.0～ +184.0°), thaum β-arbutin muaj qhov tsis zoo (-64°～-68°), uas kuj yog qhov sib txawv tseem ceeb thiab txoj kev txiav txim siab ntawm ob.
3) Tus nqi ntawm α-arbutin yog 3 zaug siab dua li ntawm β-arbutin, tab sis cov nyhuv ntawm daim tawv nqaij yog 10 npaug siab dua li ntawm β-arbutin.
4) β-arbutin muaj nyob rau hauv qhov, tab sis α-arbutin tsis muaj
五. Nco ntsoov:
1. Ob leeg β-arbutin thiab α-arbutin tsuas tuaj yeem siv sab nraud, tsis hais qhov ncauj.
2. Arbutin tsis tuaj yeem siv rau hauv cov mis nrog methyl paraben, nws yog ib qho yooj yim los tsim hydroquinone, ib yam khoom uas tsim kev puas tsuaj rau daim tawv nqaij.
3. Thaum tsim cov khoom tu tawv nqaij, ntxiv cov tshuaj tiv thaiv kab mob kom tsim nyog los tiv thaiv cov xim tsis zoo.
4. Arbutin tsis yooj yim rau decompose nyob rau hauv cov tshuaj tiv thaiv kub ntawm 30 ~ 50 ℃.
5. Tus nqi pH ntawm arbutin yuav tsum tau tswj ntawm 5-7, thiab nws cov stability yuav tsum tau tswj nyob rau hauv qhov tsim nyog ntawm tib neeg cov tawv nqaij. Alkaline yuav hloov xim, thiab acid yuav decompose nyob rau hauv ib tug me me npaum li cas.
6. Txhawm rau kom nrawm qhov nqus ntawm arbutin, 0.8% ~ 1% ntawm osmotic agent Azone tuaj yeem ntxiv.
六. Ntim& Cia
Packing specification: 25kg cardboard nruas lined nrog ob-txheej hnab yas.
Txoj kev cia: Thov muab tso rau hauv qhov chaw qhuav thiab qhov cua, tsis txhob tshav ntuj ncaj qha thiab kub siab.