Hye Sun Choi

ORCID: 0000-0003-3430-518X
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Food Quality and Safety Studies
  • Phytoestrogen effects and research
  • Nutrition, Health and Food Behavior
  • Agriculture, Soil, Plant Science
  • Probiotics and Fermented Foods
  • GABA and Rice Research
  • Microbial Metabolites in Food Biotechnology
  • Phytase and its Applications
  • Food composition and properties
  • Fermentation and Sensory Analysis
  • Memory and Neural Mechanisms
  • Neuroscience and Neuropharmacology Research
  • Gut microbiota and health
  • Biopolymer Synthesis and Applications
  • Tea Polyphenols and Effects
  • Polyamine Metabolism and Applications
  • Bacillus and Francisella bacterial research
  • Digestive system and related health
  • Neuroinflammation and Neurodegeneration Mechanisms
  • Protein Hydrolysis and Bioactive Peptides
  • Rice Cultivation and Yield Improvement
  • Healthcare Education and Workforce Issues
  • Microbial Inactivation Methods
  • Gastrointestinal motility and disorders
  • Wheat and Barley Genetics and Pathology

Rural Development Administration
2011-2024

Institute of Crop Science
2022

University of California, San Francisco
2020-2021

National Academy of Agricultural Science
2011-2016

National Institute of Agricultural Science and Technology
2012

This study aimed to produce rice germ yogurt by fermenting with Lactiplantibacillus plantarum JSA 22 and investigate its health-beneficial effects. was a suitable starter rapid growth rate ability synthesize lysine GABA in medium. Genomic analysis of confirmed the presence genes responsible for probiotic activity production. Fermented exhibited significant antioxidative activity. In addition, displayed prebiotic effects promoting beneficial microbiota stimulating production SCFAs. an vivo...

10.1016/j.jff.2023.105787 article EN cc-by-nc-nd Journal of Functional Foods 2023-09-09

Abstract Bacillus subtilis HJ18‐4 isolated from buckwheat sokseongjang , a traditional Korean fermented soybean food, exhibits broad‐spectrum antimicrobial activity against foodborne pathogens, including cereus . In this study, we investigated the antibacterial efficacy and regulation of toxin gene expression in B. by HJ18‐4. Expression toxin–related genes ( groEL nheA nheC entFM ) was downregulated HJ18‐4, which also exhibited strong We found that water extracts soy product with...

10.1111/1750-3841.12569 article EN cc-by Journal of Food Science 2014-10-30

Summary Kimchi was fermented in onggi and other containers at 4 °C for weeks. Two types of were used: glazed nonglazed onggi. Other such as polyethylene plastic containers, polypropylene use a kimchi refrigerator, stainless steel glass bottles used. During the fermentation, showed relatively stable acidity change compared with those containers. Also it higher lactic acid bacteria multiplication (10 8 –10 9 cfu g −1 4th week) but slower general aerobic than others. The springiness more 50%...

10.1111/j.1365-2621.2011.02710.x article EN International Journal of Food Science & Technology 2011-08-02

전통 장류 유래 효소 활성 및 항균 우수 Bacillus sp.를 스타터로 한 콩 발효물의 품질 특성을 분석하였다. 총균수는 HJ5-2를 접종한 시료가 3.00×109 CFU/mL로 가장 높았으며, 유산균은 스타터 첨가 발효물에서 2.50×102~7.30×104 CFU/mL를 나타나는 것으로 보아 접종된 균주가 우점종이 된 것을 확인하였다. α-Amylase 활성은 RD7-7(20.82 unit/mL)과 HJ18-4(18.45 unit/mL), protease RD7-7(647.92 unit/mL)을 발효물이 높은 활성을 나타내었다. 환원당 함량은 HJ18-4(2.35%), 아미노태 질소 RD7-7(227.96 mg%) 접종 함량을 아미노산 glutamic acid, aspartic leucine, lysine, arginine 순으로 검출되었다. 유기산은 oxalic acid(36.51~63.57 mg/100 g)가 모든 실험군에서 검출되었으며, succinic...

10.3746/jkfn.2014.43.5.756 article KO Journal of the Korean Society of Food Science and Nutrition 2014-05-31

In this study the effect of rice addition on quality beer was investigated. Pilot-scale brews were performed with ratios 10, 20, 30, and 40% brown (Oryza sativa L. cv. Hangaru) which compared 100% malt commercial beers in terms quality. Alcohol content between 3.93 to 4.40%. The total sugar increased when percent increased. pH range 4.32 4.60, no significant differences found among by rate added. Total acidity amino-acidity decreased corresponding increasing rice, other hand, lightness...

10.11002/kjfp.2017.24.6.758 article EN Korean Journal of Food Preservation 2017-11-01

This study was conducted in order to investigate the change of isoflavone composition (glycoside and bio-active aglycone), evaluate quality characteristics Cheonggukjang, which prepared by different bacillus strains. After 48-hour fermentation, contents daidzein, genistein, glycitein Bacillus subtilis HJ18-3 have significantly increased up approximately 89.06±3.59, 10.36±0.28, 101.37±3.67 ug/g, respectively. The KACC 15935 were 38.88±5.39, 12.58±2.14, 80.13±0.71 original content daidzein...

10.11002/kjfp.2014.21.1.121 article EN Korean Journal of Food Preservation 2014-02-01

This study investigated the quality characteristics of popped rice Doenjang prepared with different Bacillus strains (Bacillus subtilis KACC 15935, and HJ18-9). The changes in enzyme activity (protease, cellulase, ɑ-amylase), amino-type nitrogen ammonia-type contents, reducing sugar were during fermentation period. Enzymes such as protease, a-amylase plays an important role composition nutrients, flavor taste Doenjang. Protease activities deonjang fermented (control, B. HJ18-9) was range...

10.11002/kjfp.2015.22.4.545 article EN cc-by-nc Korean Journal of Food Preservation 2015-08-01

Yogurt is produced by fermentation of milk using bacteria known as “yogurt cultures”. Most these are probiotics such Lactobacillus delbrueckii subsp. bulgaricus, Lb. rhamnosus, Streptococcus thermophilus, and Bifidobacterium. The domestic fermented market increasing, about 30 companies producing yogurt. purpose this study was to analyze the quality characteristics commercial liquid Total 30types yogurts were sampled their physicochemicial properties, including pH, sugar content, acidity,...

10.11002/kjfp.2017.24.6.865 article EN Korean Journal of Food Preservation 2017-11-01

콩을 이용한 발효식품인 장류는 한국, 중국 및 일본을 중심으로 이용되는 조미료로서 중요할 뿐 아니라 단백질의 급원으로 이용되어왔다. 본 연구는 시중에 판매되는 장류 13종를 수집하여 pH, 염도, 수분, 미생물 수, 아미노태 질소, protease, amylase 활성을 분석하였다. 시료의 pH는 pH 5.17-6.86, 염도는 8.0-23.0 % 함량을 나타내었고, 수분함량은 된장(52.55-70.40%), 쌈장(50.36%), 고추장(46.44-56.41%), 간장(68.63%)으로 분석되었다. 질소 측정한 결과, 된장(309.72-736.46 mg%) 쌈장(284.69 mg%), 고추장(199.18-235.54 간장(660.53 mg%)함량을 나타내었다. 일반 세균수는 4.83-7.89 Log CFU/g의 분포를 나타내었으며, 대장균 군의 경우, CNH-2 (2.31 CFU/g)를 제외한 모든 시료에서 검출되지 않았다. B. cereus균 수는 된장은 CND-5, 6을...

10.9721/kjfst.2013.45.6.796 article EN Korean Journal of Food Science and Technology 2013-12-31

본 연구는 β-glucosidase 활성이 있는 Bacillus subtilis HJ18-9와 HJ25-8, 두 가지 균주를 혼합한 HJ18-9+HJ25-8의 3가지 스타터로 접종하여 발효시킨 soy grits 청국장의 품질 특성과 isoflavone의 함량을 측정하였다. 환원당을 유리하는 데 관여하는 α-amylase 효소 활성의 경우 HJ18-9+HJ25-8을 접종해 발효한 시료에서 다른 시료와 비교하였을 때 높은 활성을 보였다. 단백질을 분해하여 특유의 구수한 맛 성분을 protease HJ18-9+HJ25-8, HJ18-9의 순으로 나타내었다. 또한 아미노태질소와 암모니아태질소의 함량은 HJ25-8을 SG 청국장에서 높았으며, 청국장 isoflavone 비배당체 272.40±2.04 ㎍/g에 비해 HJ25-8 접종구에서 697.03±9.46, 683.10±2.05 ㎍/g으로 높았다. β-Glucosidase 균의 혼합으로 aglycone 함량의 전환율을 더 높일 수...

10.3746/jkfn.2016.45.5.702 article KO Journal of the Korean Society of Food Science and Nutrition 2016-05-31

별미장은 메주를 다른 방식으로 띄운다든가 대두 이외의 부재료를 섞어 특별한 맛을 낸 장 또는 계절에 따라 별미로 담아 먹는 단기장을 의미하며, 대맥장은 검정콩과 보리를 이용하여 만든 별미장이다. 본 연구에서는 효소 활성 및 항균 활성이 뛰어난 B. subtilis HJ18-4 균주를 제조한 대맥장의 발효 중 품질특성을 평가하였다. <TEX>${\alpha}$</TEX>-Amylase와 protease 활성은 후 6 9일째 급격히 상승했다가(<TEX>$41.45{\pm}0.3-42.72{\pm}0.16$</TEX>, <TEX>$21.84{\pm}0.24-23.11{\pm}0.35unit/g$</TEX>), 이후 일정하거나 약간 감소하였으며, 환원당 함량은 <TEX>${\alpha}$</TEX>-amylase 활성과 일치하는 변화를 보여 6일째 가장 높은 값을 나타내었으며 감소하였다. 아미노태 질소 23일째...

10.9721/kjfst.2012.44.6.743 article EN Korean Journal of Food Science and Technology 2012-12-31

This study evaluated quality characteristics of soybean fermented by selected lactic acid bacteria, which were the enzyme strains with high antimicrobial activities isolated from traditionally prepared paste. We determined total aerobic and bacteria counts, protease amylase activities, reducing sugar amino-type nitrogen contents, amounts amino acids, organic aroma-compounds. The counts in strain I13 (7.75×109 CFU/mL) highest among all analyzed. Lactic numbers 2.85×109 to 4.35×109 CFU/mL...

10.11002/kjfp.2017.24.2.187 article EN Korean Journal of Food Preservation 2017-04-01

본 연구에서는 쌀맥주 가공에 적합한 쌀 품종을 선정하기 위해 연질미 품종인 한가루, 설갱과 초다수성 다산1호 및 안다의 품질특성을 살펴보고 이를 이용하여 쌀맥주를 제조한 후 가공특성을 살펴보았다. 원료 쌀의 수분함량은 연질미인 한가루 설갱이 각각 14.48 14.62%로 안다보다 높게 나타났다. 단백질 함량은 안다가 8.11 8.12%로 다른 품종보다 높은 경향을 보였다. 아밀로오스 품종이 17.71%로 낮게 나타났으며, 환원당 함량의 경우 경도 분석 결과 측정되었다. 품종별 맥주 제조과정 시 설갱보다 잦은 응집현상이 발생되어 연질미가 더 용이한 것으로 판단하였다. 품종별로 맥주의 알코올 함량, pH 색도 측정 품종에 따른 유의적인 차이는 관찰되지 않았으나, 쓴맛을 측정한 설갱으로 맥주가 안다로 맥주보다 쓴맛 지수가 낮은 이상의 결과를 종합하여 볼 때 맥주를 제조할 경우, 일반미 보다는 적합할 판단된다. The purpose of this study was to...

10.7740/kjcs.2017.62.2.113 article EN Korean Journal of Crop Science 2017-06-30
Coming Soon ...