title: [Studies on digestive enzyme activity of Whitmania pigra in different months old].
abstract: Studies on the variation of amylase, lipase and lrotease activity of Whitmania pigra in 0-6 months old using 3, 5-dinitro- salicylic acid colorimetry, right-nitrophenyl palmitate ester (ρ-NPP) colorimetry and folin-phenol method. The results showed that pro- tease activity remained low before 1.5 months old and with the highest activity in 2 months old, but after showing a small peak in 4 months, alkaline protease rapid declined. Amylase was low at born, then gradually increased the activity of the highest in 2.5 months old. Lipase with a strong vitality at birth, then 1 month with minimum and 2 months peaked, but appeared a small peak in 4 months old. In summary, only lipase exhibits strong activity at birth, lipase with the strongest activity in the digestive tract during develop- ment. Protease, lipase and amylase with the strongest activity at 2-3 months old, but were decreased after 4 months old.
authors.forename: Hong-zhuan
authors.initials: HZ
authors.lastname: Shi
authors.forename: Hong
authors.initials: H
authors.lastname: Liu
authors.forename: Qiao-sheng
authors.initials: QS
authors.lastname: Guo
authors.forename: Jia
authors.initials: J
authors.lastname: Wang
authors.forename: Fei
authors.initials: F
authors.lastname: Liu
authors.forename: Meng-meng
authors.initials: MM
authors.lastname: Li
mesh_terms: D000367:Age Factors; D000681:Amylases / Q000378:metabolism; D000818:Animals; D007865:Leeches / Q000201:enzymology*; D008049:Lipase / Q000378:metabolism; D010447:Peptide Hydrolases / Q000378:metabolism
chemical_list: D008049:Lipase; D000681:Amylases; D010447:Peptide Hydrolases