Research on Bacteriostasis of Systematic Solvents Extracts from Sweet Potato Stem and Leaf

Abstract

Abstract: The bacteriostasis of systematic solvents extracts from sweet potato stem and leaf (SPSL) was studied. Six systematic solvents extracts were conducted foe the inhibitory effects against bacillus (Escherichia coli,Staphylococcus aureus and Shiga bacillus) and fungus (Rhizopus stolonifer and Aspergillus niger). Calcium propionate and sodium benzoate were chosen for control groups. The results indicated that SPSL were good at restraining bacillus. The acetone extract and ethanol extract had strong effect on inhibition of bacillus than others’. The inhibitory effects of SPSL on fungus were better than control groups’. The petroleum ether extract and chloroform extract had strong effect on inhibition of fungus than others’.

Key words: , sweet potato stem and leaf； secondary chemicals； systematic solvents； bacteriostasis；

GAO Yin-Yu, Zhang-Yu, Ji-Ling. Research on Bacteriostasis of Systematic Solvents Extracts from Sweet Potato Stem and Leaf[J]. FOOD SCIENCE, 2006, 27(11): 174-176.

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Research on Bacteriostasis of Systematic Solvents Extracts from Sweet Potato Stem and Leaf

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