This study assessed the quality and biological activity of Vietnamese single-bulb black garlic(SBG)by investigating the effect of different temperatures(60,65,70,and 75℃)on physicochemical properties during the heat ...This study assessed the quality and biological activity of Vietnamese single-bulb black garlic(SBG)by investigating the effect of different temperatures(60,65,70,and 75℃)on physicochemical properties during the heat treatment process.The optimal treating conditions accounted for the highest concentration of antioxidants were 70℃for 42 days.The SBG.70 had a higher content of reducing sugar,protein,flavonoid,and polyphenol in comparison with the white garlic and the others.Antioxidant activity of single-bulb white garlic and SBG were measured via DPPH,phosphomolybdenum,and H2O2 radicals,as well as a reduction potential.The antimicrobial activity was assessed by the multi-concentration dilution method;the sample treated at 70℃displayed the strongest activity against four microbial strains with MIC values for S.aureus,P.aeruginosa,B.cereus,and C.albicans of 64,128,128,and 64μg/mL,respectively.Additionally,only two SBG samples aged at 70℃and 75℃were bacteriostatic to E.coli with MIC values of 32 and 64μg/mL,respectively.展开更多
文摘This study assessed the quality and biological activity of Vietnamese single-bulb black garlic(SBG)by investigating the effect of different temperatures(60,65,70,and 75℃)on physicochemical properties during the heat treatment process.The optimal treating conditions accounted for the highest concentration of antioxidants were 70℃for 42 days.The SBG.70 had a higher content of reducing sugar,protein,flavonoid,and polyphenol in comparison with the white garlic and the others.Antioxidant activity of single-bulb white garlic and SBG were measured via DPPH,phosphomolybdenum,and H2O2 radicals,as well as a reduction potential.The antimicrobial activity was assessed by the multi-concentration dilution method;the sample treated at 70℃displayed the strongest activity against four microbial strains with MIC values for S.aureus,P.aeruginosa,B.cereus,and C.albicans of 64,128,128,and 64μg/mL,respectively.Additionally,only two SBG samples aged at 70℃and 75℃were bacteriostatic to E.coli with MIC values of 32 and 64μg/mL,respectively.
