Keggin型多金属氧酸盐的抑酶活性及果蔬保鲜应用  

Inhibitory Effects of Keggin-type Polyoxometalates on PPO and Their Application in Storage of Rambutan

作　　者：郑阿萍 ZHENG A-ping(Quanzhou Institute of Technology,Quanzhou 362300,China)

机构地区：[1]泉州理工职业学院,福建泉州362300

出　　处：《内蒙古民族大学学报（自然科学版）》2018年第3期204-207,218,共5页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：晋江市科技计划项目(2017S003)

摘　　要：以Keggin型多金属氧酸盐Na_3PW_(12)O_(40)为效应物,研究其对山药多酚氧化酶的抑制作用,并研究了4种多金属氧酸盐H_4SiW_(12)O_(40)·xH_2O,H_3PW_(12)O_(40)·xH_2O,α-1,2,3-K_6H[SiW_9V_3O_(40)],α-K_5[SiW_(11)VO_(40)](以下分别简写为SiW_(12),PW_(12),SiW_9V_3,SiW_(11)V)对红毛丹果实贮藏保鲜的简单应用实验,结果表明,Na_3PW_(12)O_(40)对多酚氧化酶的半抑制率(IC_(50))为1.61 mmol/L,抑制类型为非竞争型,抑制常数K_I=K_(IS)=0.21 mmol/L.同时,相比于对照组,4种多金属氧酸盐对红毛丹果实保鲜效果均较好,其中保鲜效果最佳的为PW12.The inhibition effects of Keggin-type polyoxometalates（Na3PW（12）O（40））on activity of polyphenol oxidase（PPO）and the effects of polyoxometalates（H4SiW（12）O（40）·xH2O,H3PW（12）O（40）·xH2O,α-1,2,3-K6H[SiW9V3O（40）],α-K5[SiW（11）VO（40）]（abreviated as Si W（12）,PW（12）,SiW9V3,SiW（11）V）on storage of Rambutan were studied. The results showed that the half inhibition rate（IC（50））of PPO by Na3PW（12）O（40） was 1.61 mmol/L,the inhibition type was non-competitive,and the inhibition constant was KI=K（IS）=0.21 mmol/L. At the same time,compared with the control group,four kinds of polyoxometalates had better effects on the fruit preservation of Rambutan,among which PW（12） was the best.

关 键 词：多金属氧酸盐 动力学 保鲜实验 

分 类 号：O614.5[理学—无机化学]