Effect of Low Temperature on Antibacterial Activity of Different Molecular Weight of Hydrolysate from Zanthoxylum bungeanum Maxim. Seed

doi:10.3969/j.issn.1673-1689.2018.06.011

Home > Archive>Volume 37, Issue 6, 2018 >639-645. DOI:10.3969/j.issn.1673-1689.2018.06.011

Effect of Low Temperature on Antibacterial Activity of Different Molecular Weight of Hydrolysate from Zanthoxylum bungeanum Maxim. Seed
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                        10.3969/j.issn.1673-1689.2018.06.011
                    
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In order to acquire the influence on antibacterial activity of different molecular weight of hydrolysate from Chinese prickly ash seed，this study analysed the effect on bacteriostatic rate，solubility，protein electrophoretic band and sulphydryl content of hydrolysate after the treatment of different freezing temperature and multigelation. The results indicated that freezing temperature had a certain influence on bacteriostatic rate，solubility，and sulphydryl content and the treatment of -15 ℃ freezing proved the highest bacteriostatic rate of E.coli 78.24% and S.aureus 72.46%. Multigelation had no influence on bacteriostatic rate and solubility，but total and active sulfydryl content dropped with times of freezing-thawing increased. The bacteriostatic rates of different molecular weight of hydrolysate were different between E.coli and S.aureus：the highest rate of E.coli is those below 3 000（-15 ℃ and -70 ℃） and 3 000～10 000（-20 ℃ and -50 ℃） respectively. And the highest rate of S.aureus is that below 3 000 to four freezing temperatures and that above 10 000 didn't work. This study shows that low temperature has a certain influence on antibacterial activity of different molecular weight of hydrolysate.

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DONG Xiaohua, SHEN Guanghui, WANG Jia, MA Li, LI Shanshan, ZHANG Zhiqing. Effect of Low Temperature on Antibacterial Activity of Different Molecular Weight of Hydrolysate from Zanthoxylum bungeanum Maxim. Seed[J]. Journal of Food Science and Biotechnology,2018,37(6):639-645.

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Online: September 27,2018
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