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izindaba

Isingeniso

I-Arbutin, (i-hydroquinone-O-beta-D-glucopyranoside) okuphuma ngokwemvelo kwe-d-glucopyranoside kwe-hydroquinone.I-hydroquinone glucoside iyinhlanganisela esuselwe kusayensi yezitshalo etholakala ezinhlotsheni ezithile zezitshalo, njenge-bearberry, ama-cranberries, amajikijolo aluhlaza, ukolweni, amapheya kanye nesithelo esisha se-California buckeye, i-Aesculus californica.Ingxenye esebenzayo, i-hydroquinone, ikhishwa yi-hydrolysis yengxenye ye-glucoside.Njengoba ikhishwa kancane, ukusetshenziswa kwe-arbutin kungase kungacasuli kunokusebenzisa i-hydroquinone ngokuqondile.Umphumela omnene we-arbutin ubangelwa ukukhishwa okulawulwayo kwe-hydroquinone ngenxa ye-in-vivo cleavage yebhondi ye-glycosidic.I-Arbutin ikhona ngamafomu ama-2, okuyi-alpha ne-beta-arbutin.Kubonakala sengathi i-alpha-arbutin inikeza ukuzinza okuphezulu nokusebenza ngempumelelo uma kuqhathaniswa nefomu le-beta.

i-arbutin-1

Imodi yesenzo

I-Arbutin yenze umphumela wayo ngokukhishwa okulawulwayo kwe-hydroquinone nge-in vivo hydrolysis yebhondi ye-glycosidic.Kubikwa abacwaningi abahlukahlukene ukuvimbela i-oxidation ye-L-DOPA eyenziwa yi-mushroom tyrosinase.Ucwaningo lubonise ukuthi i-arbutin ivimbela ukuhlanganiswa kwe-melanin ngokuvimbela umsebenzi we-tyrosinase.Lokhu kubonakala kubangelwa ukuvinjelwa komsebenzi we-melanosomal tyrosinase kanye neprotheni ye-Pmel-17 ekugxilweni kwe-noncytotoxic esikhundleni sokucindezelwa kokuhlanganiswa nokuvezwa kwale enzyme.Iphinde ivimbele ukuvuthwa kwama-melanosomes, okungenzeka ngethonya layo elibikiwe ku-DHICA (5,6-dihydroxyindole-2-carboxylic acid) umsebenzi we-polymerase.Kucatshangwa ukuthi umsebenzi we-arbutin uqhutshwa ama-homologies esakhiwo ahlanganyela ne-substrate tyrosine.Kwaboniswa ukuthi i-arbutin ivimbela i-oxidation ye-L-tyrosine (umsebenzi we-monophenolase) eyenziwa yi-mushroom tyrosinase nokuthi iqhudelana neziza ezisebenzayo ezibophayo ku-tyrosinase ngaphandle kokuthonya ukulotshwa kwe-mRNA kwe-tyrosinase noma ukwenziwa i-oxidized.Kodwa-ke, i-arbutin yona ngokwayo yafakwa i-oxidized njenge-monophenol substrate ngenani eliphansi kakhulu, futhi ukufakwa kwe-oxidation kwasheshiswa ngokushesha nje lapho amanani e-catalytic (0.01 mM) we-l-3,4- dihydroxyphenylalanine (L-DOPA) etholakala njenge-cofactor.

Izinhlobo ze-arbutin

I-Arbutin isetshenziselwa ukuthengisa njenge-ejenti emhlophe yesikhumba embonini yezimonyo.Isebenza ngokuvinjelwa kokuncintisana kwe-enzyme, i-tyrosinase, i-enzyme eyinhloko ekuhlanganiseni kwe-melanin.Ngokuya ngesakhiwo sendawo sokuxhumanisa kwe-glycosidic phakathi kwe-glucose ne-hydroquinone, i-arbutin yakha ama-epimers amabili: i-Alpha Arbutin ne-Beta arbutin.

Into I-Alpha-Arbutin I-Beta-Arbutin
Ukubukeka I-Crystalline Powder Emhlophe I-crystalline powder emhlophe
Isivivinyo 99.0% iminithi. 99.5%imizuzu
Iphoyinti lokuncibilika 202 ~ 207 ℃ 198.5 ~ 201.5 ℃
Ukucaca kwesixazululo samanzi

Ukungafihli, okungenambala, azikho izindaba ezimisiwe

Ukungafihli, okungenambala, azikho izindaba ezimisiwe

Inani le-pH lika-1% wesisombululo esinamanzi 5.0~7.0 5.0-7.0
Ukujikeleza kwe-optical okuqondile 【ɑ】D20=+176~184° 【α】D20=-66±2º
I-Arsenic ≤2 ppm ≤2 ppm
IHydroquinone ≤10 ppm ≤10 ppm
Insimbi enzima ≤10 ppm ≤10 ppm
Ukulahlekelwa ekomisweni ≤0.5% ≤0.5%
Izinsalela zokubasa ≤0.5% ≤0.5%
I-Pathogen Amagciwane:≤100cfg/gFungus: ≤100 cfu/g Amagciwane:≤300cfu/gFungus:≤100cfu/g

Umsebenzi

1. Isikhumba siyakhanya, Sibe mhlophe futhi sikhiphe i-fleck

2. Vimbela imisebe ye-ultraviolet

3.Thuthukisa amasosha omzimba

4. Yiba muhle esifweni sethu se-enteric

5. Inomsebenzi we-antiphlogistic kanye ne-analgesic ukuze ushise futhi ushise


Isikhathi sokuthumela: Jan-21-2021