• Preventive Nutrition and Food Science
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• 제2권3호
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• pp.259-262
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• 1997

The microstructures of soybean milk curds, prepared by different coagulation methods, were observed by the scaning electron microscope. Th curd coagulated by theaddition of bacerial soybean mil clotting enzyme showed little textural changes and gave smoother gel than those prepared either by lactic acid fermentation using Streptococcus thermophilus or by the addition of CaSO$_4$. The curds obtained by lactic acid fermentation and by the addition of inorganic salt exhibited three dimensional network structure which indicated harder gel than that prepared by soybean mil clotting enzyme.

• 한국식품조리과학회지
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• 제20권4호
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• pp.380-386
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• 2004

발효방법과 유색미 첨가량을 달리한 증편을 제조하여 품질특성을 검토하였다. 유색미 첨가량이 많을 수록 yeast를 첨가한 증편의 수분함량이 증가하였으며, 전통적인 방법으로 제조한 증편보다 대체로 높은 수분함량을 나타내었다. L값과 b값은 발효방법에 관계없이 유색미를 첨가하지 않은 시료가 첨가한 시료에 비해 높았으며, a값은 낮았다. 유색미를 5% 또는 10% 첨가한 시료의 팽화도가 유의적으로 높았으며 다른 시료들간에 유의차가 없었다. 유색미 첨가량이 많을수록 경도, 응집성, 탄력성, 씸힘성은 감소하는 경향이었으나, 부착성은 증가하는 경향이었다. 호화도는 발효방법에 상관없이 유색미 첨가량이 많아질수록 유의적으로 높았다. 관능검사 결과 유색미를 30% 첨가증편이 기공의 균일성 항목을 제외하고 가장 좋지 않게 평가되었으며, 나머지 시료사이에는 유의적인 차이가 거의 나타나지 않았다. 전통적인 방법과 yeast를 첨가사이에서는 뚜렷한 차이는 보이지 않았다.

• 한국식품저장유통학회지
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• 제9권4호
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• pp.406-410
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• 2002

김치제조시 녹차의 첨가방법이 발효특성과 관능적 품질에 미치는 영향을 조사하기 위하여 1%의 녹차추출물를 함유하는 소금물로 절인 후 담근 김치(I), 절임배추를 1% 녹차추출 물에 일정시간 담금후 제조한 김치(II), 녹차 1%를 양념과 혼합하여 담근 김치(III)의 3가지 방법으로 김치를 제조한 후 1$0^{\circ}C$에서 숙성시키면서 pH, 산도, 균수, 색상 및 관능적 품질을 조사하였다. 대조구의 pH는 숙성중 I~III의 경우보다 낮아 녹차처리구가 숙성이 지연되었다. 산도의 경우도 pH와 역으로 pH의 결과와 일치하였다. 그러나 녹차처리방법에 따른 큰 차이는 보이지 않았다. 대조구의 총균수와 젖산균수는 각각 6.16~9.29 및 4.59~8.42 log cfu/mL로I~III의 5.40~8.38 및 4.99~8.07 log cfu/mL보다 높았다. 김치조직의 L＊값은 I< II

• 한국식생활문화학회지
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• 제11권4호
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• pp.497-506
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• 1996

Fermentation characteristics and quality changes of the typical Korean traditional alcoholic beverages (Kwahaju, Sokokju, Baikhaju, Samhaeju and Hosanchun) were investigated during fermentation and after aging, respectively. They were prepared by their own brewing methods with respect to the same contents of rice and Nuruk (Korean-style bran koji). The consumed total sugar content of the alcoholic beverages (Sokokju, Baikhaju, Samhaeju and Hosanchun) which were brewed with the multiple input steps of seed mash and raw material (ABMIS) was higher than that of the alcoholic beverage (Kwahaju) which was brewed with the single input step (ABSIS). The pH values of all the beverages were similar and were ranged from 3.2 to 3.6. The acidity of ABMIS were lower than that of ABSIS, but alcohol concentration of ABMIS were higher. The fermentation period of the alcoholic beverages with triple input steps was the longest among them. The inner temperature and microbial growth in all the beverages increased at each of input steps of the raw materials. Fusel oil content of ABMIS was lower than that of ABSIS. Major components of the fusel oil were iso-amyl alcohol, iso-butanol, n-propanol, ethyl acetate and acetaldehyde, and its minor components were methanol and n-butanol. The results on quality changes of the alcoholic beverages after aging showed increase of alcohol in ABMIS, but decrease of sugar and acidity. Fusel oil contents of Kwahaju and Samhaeju decreased to be ranged from 3.1% to 13.9% after aging, but those of Sokokju, Baikhaju and Hosanchun increased to be ranged from 10.9% to 23.0%. Sensory evaluation of ABMIS showed better scores than that of ABSIS. It was suggested that the brewing method with multiple input steps of seed mash and raw material was one of the methods to increase fermentation efficiency for brewing the Korean traditional alcoholic beverages.

• Journal of Ginseng Research
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• 제43권1호
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• pp.20-26
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• 2019

Background: Ginsenosides, which are bioactive components in ginseng, can be converted to smaller compounds for improvement of their pharmacological activities. The conversion methods include heating; acid, alkali, and enzymatic treatment; and microbial conversion. The aim of this study was to determine the bioconversion of ginsenosides in fermented red ginseng extract (FRGE). Methods: Red ginseng extract (RGE) was fermented using Lactobacillus plantarum KCCM 11613P. This study investigated the ginsenosides and their antioxidant capacity in FRGE using diverse methods. Results: Properties of RGE were changed upon fermentation. Fermentation reduced the pH value, but increased the titratable acidity and viable cell counts of lactic acid bacteria. L. plantarum KCCM 11613P converted ginsenosides $Rb_2$ and $Rb_3$ to ginsenoside Rd in RGE. Fermentation also enhanced the antioxidant effects of RGE. FRGE reduced 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity and reducing power; however, it improved the inhibition of ${\beta}$-carotene and linoleic acid oxidation and the lipid peroxidation. This suggested that the fermentation of RGE is effective for producing ginsenoside Rd as precursor of ginsenoside compound K and inhibition of lipid oxidation. Conclusion: This study showed that RGE fermented by L. plantarum KCCM 11613P may contribute to the development of functional food materials.

• Journal of Microbiology and Biotechnology
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• 제32권7호
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• pp.902-910
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• 2022

The ginsenoside compound K (C-K) is widely used in traditional medicines, nutritional supplements, and cosmetics owing to its diverse pharmacological activities. Although many studies on C-K production have been conducted, fermentation is reported to produce C-K with low concentration and productivity. In the present study, addition of an inducer and optimization of the carbon and nitrogen sources in the medium were performed using response surface methodology to increase the C-K production via fermentation by Aspergillus tubingensis, a generally recognized as safe fungus. The optimized inducer and carbon and nitrogen sources were 2 g/l rice straw, 10 g/l sucrose, and 10 g/l soy protein concentrate, respectively, and they resulted in a 3.1-fold increase in the concentration and productivity of C-K (0.22 g/l and 1.52 mg/l/h, respectively) compared to those used before optimization without inducer (0.071 g/l and 0.49 mg/l/h, respectively). The feeding methods of American ginseng extract (AGE), including feeding timing, feeding concentration, and feeding frequency, were also optimized. Under the optimized conditions, A. tubingensis produced 3.96 mM (2.47 g/l) C-K at 144 h by feeding two times with 8 g/l AGE at 48 and 60 h, with a productivity of 17.1 mg/l/h. The concentration and productivity of C-K after optimization of feeding methods were 11-fold higher than those before the optimization (0.22 g/l and 1.52 mg/l/h, respectively). Thus, the optimization for the feeding methods of ginseng extract is an efficient strategy to increase C-K production. To our knowledge, this is the highest reported C-K concentration and productivity via fermentation reported so far.

• 한국식품영양과학회지
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• 제26권5호
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• pp.807-813
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• 1997

Various additives(glucono-$\delta$-lactone, glycine, chitosan, Chinese pepper extract+msutard oil, cinnamon oil+ginger oil+mustard oil, Chinese pepper extract), used in the Korean patents singularly or in combination, were tested for extension of shelf-life of kimchi. Addition of glucono-$\delta$-lactone or chitosan was somewhat effective in delaying the fermentation rate, however no such effect was seen by other additives. Chitosan at the concentrations of 0.5, 1.0, and 1.5% was similarily effective in delaying the fermen-tation rate. Mustard oil or cinnamon oil tend to delay the fermentation rate by singular addition at the concern tration of 0.5% or 1%. Soaking of the salted and washed Chinese cabbage in 0.5% chitosan solution resulted in delay of the fermentation rate of kimchi.

• 한방비만학회지
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• 제18권2호
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• pp.64-73
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• 2018

Objectives: This study investigated the effect on microbial ecology, fermentation characteristics and anti-obesity of Platycodon grandiflorum (PG) fermentation with salt. Methods: PG was fermented for four weeks with 2.5% salt and the characteristics of fermented PG were performed by measuring pH, total sugar content, viable bacteria number and microbial profiling. Also, we measured total polyphenol, flavonoid and the percent of inhibition of lipase activity and lipid accumulation. Results: Salt added to PG for fermentation had an effect on pH, total sugar, total and the number of lactic acid bacteria. Total sugar and pH were reduced and number of total and lactic acid bacteria were increased after fermentation. The majority of bacteria for fermentation were Lactobacillus plantarum, Leuconostoc psedomesenteroides and Lactococcus lactis subspecies lactis regardless of salt addition. However, microbial compositions were altered by added salt and additional bacteria including Weissella koreensis, W. viridescens, Lactobacillus sakei and Lactobacillus cuvatus were found in fermented PG with salt. Total flavonoid was increased in fermented PG and lipid accumulation on HepG2 cells treated with fermented PG was reduced regardless of salt addition. Moreover, fermented PG without salt suppressed lipase activity. Conclusions: Addition of salt for PG fermentation had influence on fermentation characteristics including pH and sugar content as well as number of bacteria and microbial composition. In addition, fermented PG showed anti-obesity effect by increasing flavonoid content and inhibition of lipase activity and lipid accumulation.

• 한국식품저장유통학회지
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• 제14권5호
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• pp.557-563
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• 2007

본 연구에서는 현미 4종의 알코올 발효액 및 부산물의 품질특성을 조사하였다. 비열처리 알코올발효 구간에서 알코올함량은 대안벼(A), 백진주(B) 및 설갱(C)이 각각 9.5, 9.7 및 9.8%로 높게 나타났으며 고아미(D)가 3.5%로 가장 낮은 함량을 보였다. 비열처리구간의 유리당 총 함량은 고아미가 244.2 mg%로 가장 높게 나타났고, 열처리 알코올 발효구간이 전반적으로 당 함량이 높았으며 현미 품종간 차이는 약간 있었다. 비열 및 열처리 알코올 발효 방법에 따른 부산물의 총식이섬유 소 함량은 설갱 > 백진주 > 대안벼 > 고아미 품종순으로 높았다. 고아미의 알코올발효방법에 따른 총 유리아미노산 함량은 비열처리 고아미 부산물 > 고아미 분말 > 열처리 고아미 부산물 순으로 나타났다. 이상의 결과 고아미(D)는 비열처리 알코올발효에서 수율은 가장 낮았으나 발효 부산물의 활용가능성이 가장 높은 것으로 나타났다. 특히 고아미 발효 부산물에는 전분, 식이 섬유소, 유리아미노산 등 영양성분이 많아 다양한 식품재로 활용이 기대되었다.

• 한국식생활문화학회지
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• 제34권2호
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• pp.142-158
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• 2019

Kimchi is a traditional Korean fermented vegetable probiotic food. The use of high quality ingredients and predominant LAB (lactic acid bacteria)-whether it be ambient bacteria or adding starters, low temperature and facultative anaerobic condition for the fermentation are important factors for preparing kimchi with better taste and functionality. The predominated LAB genera are Leuconostoc, Lactobacillus, and Weissella in kimchi fermentation. The representative species are Leu. mesenteroides, Leu. citrium, Lab. plantarum, Lab. sakei, and Wei. koreensis. Kimchi, especially the optimally fermented kimchi, has various health benefits, including control of colon health, antioxidation, antiaging effects, cancer preventive effect, antiobesity, control of dyslipidemic and metabolic syndrome, etc.; due to the presence of LAB, various nutraceuticals, and metabolites from the ingredients and LAB. The kimchi LAB are good probiotics, exhibiting antimicrobial activity, antioxidant, antimutagenic and anticancer effects, as well as immunomodualatory effect, antiobesity, and cholesterol and lipid lowering effects. Thus, kimchi ingredients, LAB, fermentation methods, and metabolites are important factors that modulate various functionalities. In this review, we introduced recent information showing kimchi and its health benefits in Korean Functional Foods (Park & Ju 2018).