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반가희,김수환,강동현,박상현 한국식품과학회 2023 Food Science and Biotechnology Vol.32 No.12
Biofilm formation is a strategy in which microorganisms generate a matrix of extracellular polymeric substances to increase survival under harsh conditions. The efficacy of sanitization processes is lowered when biofilms form, in particular on industrial devices. While various traditional and emerging technologies have been explored for the eradication of biofilms, cell resistance under a range of environmental conditions renders evaluation of the efficacy of control challenging. This review aimed to: (1) classify biofilm control measures into chemical, physical, and combination methods, (2) discuss mechanisms underlying inactivation by each method, and (3) summarize the reduction of biofilm cells after each treatment. The review is expected to be useful for future experimental studies and help to guide the establishment of biofilm control strategies in the food industry.
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Sulfuretin Prevents Obesity and Metabolic Diseases in Diet Induced Obese Mice
김수지,송노준,장서혁,반가희,최유리,이동권,윤의정,최진희,이전,유재혁,신동한,박기문,강희,이석찬,구진모,조윤신,박계원 한국응용약물학회 2019 Biomolecules & Therapeutics(구 응용약물학회지) Vol.27 No.1
The global obesity epidemic and associated metabolic diseases require alternative biological targets for new therapeutic strategies. In this study, we show that a phytochemical sulfuretin suppressed adipocyte differentiation of preadipocytes and administration of sulfuretin to high fat diet-fed obese mice prevented obesity and increased insulin sensitivity. These effects were associated with a suppressed expression of inflammatory markers, induced expression of adiponectin, and increased levels of phosphorylated ERK and AKT. To elucidate the molecular mechanism of sulfuretin in adipocytes, we performed microarray analysis and identified activating transcription factor 3 (Atf3) as a sulfuretin-responsive gene. Sulfuretin elevated Atf3 mRNA and protein levels in white adipose tissue and adipocytes. Consistently, deficiency of Atf3 promoted lipid accumulation and the expression of adipocyte markers. Sulfuretin’s but not resveratrol’s anti-adipogenic effects were diminished in Atf3 deficient cells, indicating that Atf3 is an essential factor in the effects of sulfuretin. These results highlight the usefulness of sulfuretin as a new anti-obesity intervention for the prevention of obesity and its associated metabolic diseases.
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김진희,최송이,황인준,현정은,김선애,반가희,김세리 한국식품저장유통학회 2022 한국식품저장유통학회지 Vol.29 No.7
This study aimed to investigate the contamination sources of button mushrooms by assessing the microbial load on the mushrooms and in the agricultural inputs that come into contact with the mushroom. A total of 234 samples including mushrooms, compost, casing soil, and tools from A, B, C, and D farms were tested for sanitary indicators (aerobic bacteria, coliforms, and Escherichia coli) and foodborne pathogens (E. coli O157:H7, Salmonella spp., Staphylococcus aureus, and Listeria monocytogenes). To identify the contamination source, E. coli was isolated and analyzed using MLST (Multi-Locus Sequence Typing). The number of aerobic bacteria remained consistent during composting (>7 log CFU/g); however, the occurrence of coliforms and E. coli was reduced to the detection limit (<1.0 log). Salmonella spp. and L. monocytogenes were detected in the raw material; however, they were inactivated during composing. More than 6.0 log of aerobic bacteria and 3.0 log of coliforms were observed in the casing soil from A, B, and C farms and in the gloves from the C farm. MLST indicated that the STs of E. coli isolated from casing soil layer and from the harvested mushrooms were identical at ST 189. Therefore, cross contamination occurred through the casing soil layer, and this could contribute to E. coli contamination in mushrooms. It is necessary to practice hygiene guidelines, such as sterilization of casing soil, worker hygiene, and facility sanitation, to minimize the potential of microbial contamination in mushrooms.
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