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서형주,최장원,Suh, Hyung-Joo,Choi, Jang-Won The Korean Society for Biotechnology and Bioengine 2010 KSBB Journal Vol.8 No.1
The mycelial dispersed growth of Cordyceps sinensis was optimized in submerged batch culture at initial pH of 5.0, 150 rpm, and $25^{\circ}C$. The morphological data showed much more dispersed growth of C. sinenesis at initial pH of 5.0. Also, projected area, main hyphal length and number of tips for the mycelial growth of initial pH 5.0 were higher than those of other initial pHs. The industrial medium for mycelial production of C. sinensis was determined to be molasses of 100 g and crushed brewery yeast of 10 g per liter as carbon and nitrogen sources, respectively. With these culture conditions, the maximum production of mycelia was approximately 30.0 g per liter by batch culture in 5-liter jar fermenter with no controlled pH. This result suggests that large-scale mycelia production of C. sinensis may be possible in submerged batch culture. The hot water extract of mycelia from C. sinensis was mainly composed of 83.0% carbohydrate, 11.8% protein, 1.9% lipid, and 2.4% ash and there were present glucose, mannose, galactose, and arabinose as molar ratio of 8.79 : 2.59 : 1.34 : 1.0 in the carbohydrate, respectively. In the experiment using spleen cell and macrophage, the extract showed potent mitogenic and immuno-stimulating activities and among various components, an important factor that contribute to the immunological activities was turned out to be carbohydrate moiety.
수원 5호 채소 추출물의 유리라디칼 소거 및 Xanthine Oxidase 활성 저해
서형주,김영순,조정순 ( Hyung Joo Suh,Young Soon Kim,Jung Soon Cho ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.3
To examine the characteristics of the antioxidative property of Buckwheat components, acetone extracts from a buckwheat, Suwon 5, was fractionated using five solvents. Hexane, ethylacetate, ether, butanol and water fractions were obtained. Butanol fraction showed the greatest electron donating ability and inhibitory effect on lipid peroxidation. It also showed the most excellent activity in the superoxide radical scavenging activity by xanthine/xanthine oxidase-cytochrome c reduction system. Spectrophotogram of butanol fraction was similar to that of rutin. Superoxide radical scavenging activity was related to the contents of rutin. Inhibitory effect of each fraction on xanthine oxidase was also measured. Butanol fraction had the strongest inhibitory effect on xanthine oxidase and IC_(50), was 3.1 ㎍. The inhibition type of butanol fraction on xanthine oxidase turned out to be a mixture of the uncompetitive and non-competitive modes.
서형주(Hyung-Joo Suh),정수현(Soo-Hyun Chung),손종연(Jong-Youn Son),손흥수(Hung-Soo Son),조원대(Won-Dai Cho),마상조(Sang-Jo Ma) 한국식품영양과학회 1996 한국식품영양과학회지 Vol.25 No.5
본 실험에서는 국내산 양파들의 일반성분, 유리아미노산 및 유리당의 함량을 비교, 분석하였으며, 또한 Celluclast 1.5L, Viscozyme L, Cereflo 및 Pectinex 등의 효소를 첨가하였을 때의 양파 가수분해액의 수율 및 성분 변화에 대하여 조사하고자 하였다. 국내산 양파의 수분, 단백질, 지방, 탄수화물 및 회분의 함량은 89~90%, 1.8~7.9%, 0.4~0.5%, 7.1~8.5% 및 0.3~0.5%인 것으로 나타났다. 주요 유리당은 glucose, fructose 및 sucrose이었으며, 주요 유리아미노산은 cysteine, histidine, arginine 및 glutamic acid였다. Cereflo, Celluclast 1.5L, Pectinex와 Viscozyme L 처리에 의한 양파의 가수분해도는 각각 69%, 71%, 80% 및 62%이었다. 효소에 의한 양파의 가수분해시 유리당의 함량은 증가한 반면 pyruvic acid 함량은 감소하는 경향을 보였다. The changes in chemical constituents of onion in Korea and the degree of hydrolysis in onion hydrolysates by treatment of viscozyme L, celluclast 1.5L, pectinex and cereflo were investigated. Proximate compositions of onion in Korea were as follows; The contents of moisture, protein, lipid, carbohydrate and ash were 89~90%, 1.8~1.9%, 0.4~0.5%, 7.1~8.5% and 0.3~0.5%, respectively. Major free sugars were identified to be glucose, fructose and sucrose and major free amino acids were as cysteine, histidine, arginine and glutamic acid. The degree of hydrolysis by treatment of viscozyme L, celluclast 1.5L, pectinex and cereflo was 69%, 71%, 80% and 62%, respectively. During the enzymatic hydrolysis, free sugar and total sugar content increased however, pyruvic acid content decreased significantly.
서형주 ( Hyung Joo Suh ),신중철 ( Jung Cheul Shin ),김재환 ( Jae Hwan Kim ),장주현 ( Joo Hyun Jang ),한성희 ( Sung Hee Han ) 한국식품영양학회 2017 韓國食品營養學會誌 Vol.30 No.6
The purpose of this study was that the optimal hydrolysis conditions of endo- and exo-type enzymes were selected to utilize organic cheese byproducts. Optimal substrate concentration and optimum enzyme ratio were measured by using 4 kinds of endo-type enzymes (alcalase, neutrase, protamex, and foodpro alkaline protease) and two exo-type enzymes (flavourzyme and prozyme 2000P) for whey protein hydrolysis were analyzed using liquid chromatography. As a result, the optimal endo-type enzyme through the first enzyme reaction was selected as alcalse, and as a result of the secondary enzyme reaction, flavourzme was selected as the Exo type enzyme. The concentration of whey protein substrate for optimal primary and secondary enzyme reactions was 10%. In addition, the optimum ratio of enzyme was 0.5% of alcalase and 0.2% of flavourzyme, which showed low molecular weight chromatography pattern compared to 2% of alcalase and 1% of flavourzyme hydrolyzate. Therefore, hydrolyzing the endo-type enzyme alcalase at a concentration of 0.5% for 10 hours and then hydrolyzing the exo-type enzyme flavouryme at a concentration of 0.2% for 4 hours was considered to be the optimum condition.
서형주(Hyung-Joo Suh),정수현(Soo-Hyun Chung),김영순(Young-Soon Kim),홍재훈(Jae-Hoon Hong),이효구(Hyo-Ku Lee) 한국식품영양과학회 1997 한국식품영양과학회지 Vol.26 No.3
전통음료로 각광을 받고 있는 식혜의 품질을 향상시키는 목적으로 식혜제조시 가장 중요한 역할을 하는 엿기름을 밀, 쌀보리, 겉보리로 각각 소재를 달리하여 제조하여 그 특성을 비교하였다. 겉보리, 쌀보리, 밀을 이용한 엿기름 제조시 20℃에서 발아율은 6일 경과시 밀은 82%의 발아율을 보였으나, 쌀보리와 겉보리는 69%와 56%의 발아율을 보였다. 밀, 쌀보리, 겉보리의 발아시 싹의 길이에 따른 amylase의 역가를 측정한 결과, 싹의 길이가 낱알의 1.5~2.0배일 때 밀, 쌀보리, 겉보리의 amylase 역가가 3455, 3167와 1470unit로 가장 높은 역가를 보였다. 밀, 쌀보리와 겉보리를 이용하여 제조한 엿기름을 20, 30, 40와 50℃에서 각각 시간에 따른 amylase역가와 환원당의 양을 측정한 결과 4시간 추출하는 것이 amylase의 역가가 높고 또한 비교적 많은 양의 환원당이 유리되므로 가장 바람직하였다. 밀, 쌀보리와 겉보리에서 추출한 amylase는 β-amylase이거나 α-amylase에 비해 β-amylase의 역가가 강한 듯하였다. Quality of Sikhe, the Korean conventional rice beverage depended on the characteristics of saccharifying activities of various amylases, intrinsic flavour, budding rate and so on. To improve the quality of Sikhe, characteristics of malt produced with wheat, covered barley and naked barley were evaluated. The germination rate of wheat was 82%, but those of naked and covered barley were 69% and 56% for 6 days, respectively. Malt prepared from germinated grains with 1.5~2.0 times length of buds had the highest saccharifying power. When the extraction of enzyme and reducing sugar was carried out at 50℃ for 4 hr, saccharifying power and reducing sugar contents were the highest. Malt of wheat had the highest saccharifying power. Malt of naked barley had higher saccharifying power than that of covered barley. The amylase types of wheat, covered barley and naked barley were similiar to β-amylase.
수원 5호 메밀의 유리라디칼 소거 및 Xanthine oxidase 활성 저해
서형주(Hyung-Joo Suh),정수현(Soo-Hyun Chung),김영순(Young-Soon Kim),이성동(Sung-Dong Lee) 한국식품영양과학회 1997 한국식품영양과학회지 Vol.26 No.3
개량 메밀이 수원 5호의 종실과 채소의 용매 추출물의 유리라디칼 소거능과 xanthine oxidase 활성 저해효과를 측정하였다. 수원 5호 종실은 탄수화물이 67.0%로 가장 높은 함량을 보인 반면, 채소는 건물로 환산시 31.4%의 단백질, 28.6%의 회분과 25.7%의 탄수화물로 구성되어있다. 메밀의 용매 추출물 중 항산화성 물질인 페놀물질의 양은 종실에 비해 채소가 많은 양을 함유하고 있으며, 채소의 경우 에탄올과 메탄올 추출물의 경우 50.22, 42.51㎎/ml로 매우 높은 함량을 보였다. 수소 공여능은 종실에 비해 채소 추출물의 수소 공여능이 컸으며, 아세톤 추출물이 가장 높은 수소 공여능을 보였다. 또한 종실의 과산화지질 형성 억제능은 미약하였으나 채소 추출물의 과산화지질의 형성 억제능은 비교적 높은 억제능을 보였다. 특히 부탄올과 아세톤 추출물에서 높은 과산화지질 생성 억제능을 보였다. Superoxide anion radical 소거 활성은 채소의 아세톤 추출물에서 689.7U/㎎의 활성으로 높은 활성을 보였다. 또한 xanthine oxidase의 활성 저해 효과는 채소의 추출물의 저해효과가 종실 추출물 보다 높았으며, 채소의 아세톤 추출물이 2.2㎍의 IC_(50)값으로 가장 높은 저해활성을 보였다. To examine the free radical scavenging activities from buckwheat, Suwon No. 5 was extracted with various solvents. The seed of Suwon No. 5 had a high contents of carbohydrate, but the vegetable of that had a 31.4% of protein, 28.6% of ash and 25.7% carbohydrate as moisture free basis. Phenols contents of vegetable extracts had higher than those of seed extracts. Acetone extract of vegetable showed the greatest electron donating ability. Butanol and acetone extracts of vegetable showed high inhibitory effect on lipid peroxidation. Acetone extract of vegetable had also excellent activity in the superoxide radical scavenging activity by xanthine/xanthine oxidase-cytochrome c reduction system. The inhibitory effects of extracts on xanthine oxidase were measured. Acetone extract had the strongest inhibitory effect on xanthine oxidase an IC_(50) was 2.2㎍.