Huaora A
Whakamōhiotia pototia
Kei roto i te Huaora A ngā huaora A1 me te A2. He rite te hanganga o ngā huaora A1 me te A2) Ka taea te hanga Retinol mai i te beta-carotene i ahu mai i ngā tipu. I raro i te whakaterenga o te β-carotene-15, 15'-peroxide (bioxygenase) i roto i te tinana, ka taea te huri i te β-carotene ki ngā ngota e rua o te retinaldehyde (ratinal), me te retinaldehyde i roto i te reductase. Ka whakaitihia hei retinol i raro i te mahi a. Nō reira, e mōhiotia ana te beta-carotene ko te huaora A.
Ngā āhuatanga matū
He tioata kōwhai, he paura tioata rānei te Huaora A, kāore e wairewa i roto i te wai me te glycerine, ā, ka wairewa i roto i te nuinga o ngā whakarewa waro pērā i ngā waipiro, ngā ether, ngā hauwaiwai me ngā hauwaiwai halogenated. Ko te ingoa matū o te tinana o te huaora A - retinol ko te all-trance 3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexene-1)-2,4,6,8-nontetraene-1-ol, me ngā hononga takirua hono e 4 i tōna mekameka taha.
Ngā mahi me ngā pānga ā-tinana
He huaora wairewa-ngako te Huaora A, ā, ko tōna mahi ā-tinana he waikawa retinoic te nuinga. He puna nui te Carotene mō te huaora A. Ko te huaora A tino kaha i roto i te carotene ko te beta-carotene. Ko te tere mimiti i roto i te whekau tangata he tata ki te hauono o te tere mimiti o te huaora A. Ko te nuinga o te Huaora A ka rongoatia ki roto i te ate i roto i te tinana, e 90% ki te 95% o te tapeke, ā, he iti noa iho ka rongoatia ki roto i te kiko ngako. He tino nui te mahi a te Huaora A i roto i te mahi pākia o te tinana tangata.
