【摘 要】
：
Foodborne illness outbreaks have been on the rise,and the main responsible pathogens to cause foodborne outbreaks were L.monocytogenes,Salmonella,S.aureus,V.parahaemolyticus and Escherichia coli O157∶
【机 构】
：
Collage of Food Science and Technology, Shanghai Ocean University, , Shanghai Engineering Research C
论文部分内容阅读
Foodborne illness outbreaks have been on the rise,and the main responsible pathogens to cause foodborne outbreaks were L.monocytogenes,Salmonella,S.aureus,V.parahaemolyticus and Escherichia coli O157∶H7.The objective of this study was to evaluate the growth of L.monocytogenes,S.aureus,S.enteritidis and V.parahaemolyticus treated with the Chinese wild blueberry (Vaccinium angustifolium) and which microorganism was most susceptible to these active substance,and to determine which fractional components have antimicrobial effects.The Chinese wild blueberry extracted by methanol: water: formic acid (85∶15∶0.5),was separated using a C-18 Sep-Pak.The content of total sugar,total phenolic and anthocyanin of wild blueberry concentrate was analyzed.A two-fold dilution method was used to determine the antibacterial effect of fractional components against the four strains.The results showed that the MIC (minimal inhibitory concentration) of wild blueberry extract against L.monocytogenes,S.aureus,S.enteritidis and V.parahaemolyticus respectively were 100,100,100 and 12.5 mg/mL.V.parahaemolyticus was the most susceptible to blueberry extract and fractions treatments,and the MBCs (minimal bactericidal concentration) of phenolic and anthocyanidins were 0.20,0.13 mg/mL.L.monocytogenes,S.aureus,S.enteritidis and V.parahaemolyticus were destroyed cell membrane with wild blueberry extract and fractions,the leakage of nucleic acids and proteins elevated.The Chinese wild blueberry extracts and fractional components which had strong antibacterial as shown in this study could be applied to the field of preventive medicine,food safety,and enrich the understanding of the health benefits of wild blueberry.
其他文献
[Objective]To find out the appropriate apple cultivars for processing pure micropowder,we evaluated the physicochemical and flowability qualities of different pure apple micropowders which were proces
[Objective]To determine the microorganisms and their percentage respectively in the Antarctic krill,a simple flora analysis of the cultured microorganisms in the Antarctic krill were examined.[Methods
Pacific white shrimp (Litopenaeus vannamei) is widely cultured and commercially viable in many parts of the globe particularly in China,Malaysia,Thailand,etc.,probably because of its positive quality
[Objective]Raman scattering and microscopic observations (Confocal laser scanning microscopy (CLSM) and Scanning Electron Microscopy(SEM)) have recently been proved to be a promising technique for cha
Low molecular mass (MM)chitosan with high degree of deacetylation (DDA) has excellent bioactivity including targeting drug delivery,antibacterial and encapsulation properties.Thus,to reduce MM of chit
The maturity discrimination of hepatopancreas and gonadal development of Eriocheir sinensis always is a big challenge,and cannot be solved by conventional method,including needle puncture and naked ey
Nowadays foodbome diseases mainly caused by food borne pathogens are emerging public health concern worldwide.Thus,fast and effective approaches for detection the pathogens are vital.It is known that
Pacific saury (Cololabis saira) is one of the most important marine commercial fishes in the world.The viscera are rich in lecithin.In this study,the Pacific saury viscera was extracted by supercritic
[Objective]Quality changes of frozen mango cuboids in long-term glassy state storage with and without osmotic dehydration pretreatment were investigated.[Methods]Mango cuboids were dehydrated in mixed
[Objective]Tetrodotoxin(TTX) is a highly toxic low-molecular and non-protein marine biotoxin,and it is also one of the most toxic neurotoxin in nature.Solid-phase microextraction(SPME) is a new extrac