HÓA HỌC THỰC PHẨM - CHƯƠNG 3 - CARBOHYDRATE - TÔN NỮ MINH NGUYỆT
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Pectin<br />
Caáu taïo<br />
POLYSACCHARIDE<br />
PS dò theå: daãn xuaát methyl cuûa a pectic<br />
(α-D-1,4-polygalacturonic acid)<br />
MS: galactose, lieân keát 1,4-glucoside<br />
Mpt = 10.000 – 100.000<br />
Chæ soá ester DE: % soá nhoùm methoxy<br />
treân toång soá caùc nhoùm chöùc<br />
Chæ soá Methoxy MI: % khoái löôïng nhoùm<br />
methoxy treân khoái löôïng phaân töû<br />
MImax = 16,3%<br />
MI cuûa pectin thöïc vaät = 10 – 12 %<br />
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