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한국낙농식품응용생물학회> Journal of Dairy Science and Biotechnology

Journal of Dairy Science and Biotechnology update

Journal of Dairy Science and Biotechnology

  • : 한국낙농식품응용생물학회
  • : 농학분야  >  농공학
  • : KCI후보
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  • : 연속간행물
  • : 계간
  • : 2733-4554
  • : 2733-4562
  • : 유가공연구(~1995) → 한국유가공기술과학회지(1996~) → journal of milk science and biotechnology

수록정보
수록범위 : 3권2호(1984)~39권3호(2021) |수록논문 수 : 615
Journal of Dairy Science and Biotechnology
39권3호(2021년 09월) 수록논문
최근 권호 논문
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KCI후보

1Bacillus subtilis FWC1, B. amyloliquefaciens NAAS1 및 Pichia farinosa NAAS2의 산업적 생산을 위한 배양 조건

저자 : 유희섭 ( Heeseop Yoo ) , 윤용희 ( Yonghee Yoon ) , 오세종 ( Sejong Oh )

발행기관 : 한국낙농식품응용생물학회 간행물 : Journal of Dairy Science and Biotechnology 39권 3호 발행 연도 : 2021 페이지 : pp. 87-93 (7 pages)

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This study analyzed and compared growth characteristics under large-scale fermentation at 35℃ of three microorganisms with the ability to reduce odor-producing substances in livestock. The three microorganisms (Bacillus subtilis FWC1, Bacillus amyloliquefaciens NAAS1, and Pichia farinosa NAAS2) evaluated in this study have been proven effective in reducing odor-inducing substances. Bacillus subtilis FWC1 exhibited the highest viable cell count when using 2% maltodextrin as carbon source, 0.05% soy-peptone as nitrogen source, and 0.3% yeast extract. The optimum media composition for B. amyloliquefaciens NAAS1 was 1.2% modified-starch with 0.8% yeast extract. The spore formation rate in the mass production of the Bacillus strains was over 90%, indicating that optimal growth medium compositions have been identified. In the case of P. farinosa NAAS2, our optimized growth medium [2% (w/v) glucose and 1% (w/v) yeast extract] improved biomass production.

KCI후보

2장내 마이크로바이옴과 치매

저자 : 설국환 ( Kuk-hwan Seol ) , 김현욱 ( Hyoun Wook Kim ) , 유자연 ( Jayeon Yoo ) , 윤정희 ( Jeong-hee Yun ) , 오미화 ( Mi-hwa Oh ) , 함준상 ( Jun-sang Ham )

발행기관 : 한국낙농식품응용생물학회 간행물 : Journal of Dairy Science and Biotechnology 39권 3호 발행 연도 : 2021 페이지 : pp. 94-103 (10 pages)

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The lack of an effective treatment for Alzheimer's disease (AD) stems primarily from incomplete understanding of AD's causes. A rapidly growing number of scientific reports highlight important roles played by peripheral infections and intestinal bacterial flora in pathological and physiological functions involving the microbiome-intestine-brain axis. The microbiome controls basic aspects of the central nervous system (CNS), immunity, and behavior, in health and disease. Changes in the density and composition of the microbiome have been linked to disorders of the immune, endocrine, and nervous systems, including mood changes, depression, increased susceptibility to stressors, and autistic behaviors. There is no doubt that in patients with AD, restoration of the intestinal microbiome to a composition reminiscent of that found in healthy adult humans will significantly slow the progression of neurodegeneration, by ameliorating inflammatory reactions and/or amyloidogenesis. In the near future, better understanding of bidirectional communication between the brain and microbiota will allow the development of functional diets using specific probiotic bacteria.

KCI후보

3Evaluation of Commercial Disinfectants for Efficacy at Inactivating Enterobacter sakazakii (Cronobacter spp.) in Water: A Preliminary Study

저자 : Jung-whan Chon , Kun-ho Seo , Binn Kim , Jekang Her , Dongkwan Jeong , Kwang-young Song

발행기관 : 한국낙농식품응용생물학회 간행물 : Journal of Dairy Science and Biotechnology 39권 3호 발행 연도 : 2021 페이지 : pp. 104-112 (9 pages)

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This study was conducted to evaluate the efficacy of commercial disinfectants at inactivating Enterobacter sakazakii (Cronobacter spp.) in water. Disinfectant I contained 6.15% sodium hypochlorite, and disinfectant II contained both 2.25% n-alkyl dimethylbenzyl ammonium chloride and 2.25% n-alkyl ethylbenzyl ammonium chloride. Disinfectant I was added to distilled water to obtain a range of residual chloride concentrations at 50 ppm intervals with a maximum of 1-1,000 ppm. Disinfectant II was prepared at concentrations ranging from 1-200 ppm with 5 ppm intervals. Exposure time for all solutions was 10 min. In total, 58 E. sakazakii (Cronobacter spp.) strains were tested in this study. Nine isolates were obtained from clinical samples, and 49 isolates were obtained from environmental samples. Seven strains (6 clinical and 1 environmental) were able to survive in 100 ppm disinfectant I, and a maximum of 5 ppm of disinfectant II. Fifty one strains (3 clinical and 48 environmental) were not killed in 10 ppm of disinfectant I and 1 ppm of disinfectant II in water. In conclusion, this study demonstrated that clinical E. sakazakii (Cronobacter spp.) strains displayed 5- to 10-fold higher resistance to disinfectants than environmental E. sakazakii (Cronobacter spp.) strains. Disinfectant II, containing quaternary ammonium compounds, was shown to be more potent in inactivating E. sakazakii (Cronobacter spp.) in water used to clean infant formula manufacturing equipment than disinfectant I.

KCI후보

4Rates of Recovery of Enterobacter sakazakii (Cronobacter spp.) from Powdered Infant Formula Using Both a Chromogenic Agar and Real-Time PCR : A Preliminary Study

저자 : Kwang-young Song , Kun-ho Seo , Jung-whan Chon

발행기관 : 한국낙농식품응용생물학회 간행물 : Journal of Dairy Science and Biotechnology 39권 3호 발행 연도 : 2021 페이지 : pp. 113-120 (8 pages)

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Although the number of incidences of illness caused by ingestion of the bacterial pathogen Enterobacter sakazakii (Cronobacter spp.) has dramatically declined, there remains a need for a robust isolation method to recover this microbe from powdered infant formula (PIF). The current method described in the FDA's Bacteriological Analytical Manual requires multiple steps, and 3-4+ days for complete analysis of PIF isolated E. sakazakii (Cronobacter spp.). We describe a bacteriological method including a one-step enrichment followed by plating on chromogenic agar for presumptive identification of E. sakazakii (Cronobacter spp.). Suspected colonies are confirmed by either biochemical analyses, or a Real-Time PCR-based assay. Using this method, E. sakazakii (Cronobacter spp.) in PIF can be isolated and identified within one day (24 hours).

KCI후보

5티베트 요거트에서 분리한 유산균의 병원성 세균 항균 효과 연구

저자 : 고주영 ( Ju Young Gho ) , 이지연 ( Jiyeon Lee ) , 최한희 ( Hanhee Choi ) , 박선우 ( Sun Woo Park ) , 강석성 ( Seok-seong Kang )

발행기관 : 한국낙농식품응용생물학회 간행물 : Journal of Dairy Science and Biotechnology 39권 3호 발행 연도 : 2021 페이지 : pp. 121-127 (7 pages)

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Yogurt is produced by bacterial fermentation of milk and contains lactic acid bacteria (LAB), which produce various metabolites such as organic acid, hydrogen peroxide, and bacteriocin. This study aimed to investigate cell-free supernatants (CFS) of LAB isolated from Tibetan yogurt. CFS (TY1, TY2, TY3, TY4, TY5, TY6, and TY7) from selected strains of LAB were co-incubated with four different foodborne pathogenic bacteria, namely E. coli O157:H7, Listeria monocytogenes, Salmonella typhimurium, and Staphylococcus aureus. Inhibition of foodborne pathogenic bacterial growth was not affected in the presence of CFS (pH 6.5). In contrast, CFS without neutralization completely inhibited the growth of the bacteria. Furthermore, when the concentration of CFS (without neutralization) was changed to 1:4 and 1:8, a difference in inhibition was observed between Gram-positive and Gram-negative bacteria. CFS more effectively inhibited the growth of Gram-negative E. coli O157:H7 and S. Typhimurium than Gram-positive L. monocytogenes and S. aureus. These results suggest that organic acids in LAB may inhibit the growth of foodborne pathogenic bacteria, particularly Gram-negative bacteria.

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