• Journal of Nutrition and Health
• /
• 제34권7호
• /
• pp.741-747
• /
• 2001

The effects of fruiting body of Cordyceps militaris on the growth, the food intake, the food efficiency ratio, the lipid metabolism, the serum protein level ad enzyme activity in male rats were studied. Sprague-Dawley rats were fed four types of diets for five weeks, respectiely: a control diet, a control diet supplemented with 2%, 3% or 4% fruiting body of Cordyceps militaris(CF) powder. In rats fed 2% or 3% CF diets the body weight gain, the food intake, the concentratons of hepatic triglyceride and serum LDL-cholesterol, the atherogenic index, and the total lipid, total cholesterol, triglyceride and phospholipid in serum were similar to those in rats fed the control diet. Whereas, in 4% CF diet these were significantly decrased. But the all CF diets feeding could not decrease the food efficiency ratio, the weights of liver, pancreas, spleen, kidney and heart, and the concentration of serum HDL-cholesterol. Also, it was shown that the concentrations of glucose, total protein, albumin, urea and creatinine, and the GOT, GPT, LDH, ${\gamma}$-GTP and ALP activities were the same levels in serum of rats of fed all the experimental diets.

• 한국식품저장유통학회지
• /
• 제7권2호
• /
• pp.201-206
• /
• 2000

${\beta}$-Galactosidase was extracted and purified from strawberry. The purified ${\beta}$-Galactosidase from strawberry was investigated their physicochemical characteristics. ${\beta}$-Galactosidase was purified 25.74 fold from strawberry. The purification procedure include ammonium sulfate fraction, acetone powder treatment and gel and ion exchange chromatography. Yield of the enzyme purification was 18.11%. The purified enzyme has native molecular weight of 116,000 dalton. Vmax value and Km value of ${\beta}$-Galactosidase were 0.077 mM ONPG/ml/15mim and 1.75x10-2mM, respectively. The optimum temperature and pH of ${\beta}$-Galactosidase were 43$^{\circ}$C and pH 4.0, respectively. The ${\beta}$-Galactosidase activity was stable below 50$^{\circ}$C and at pH 4.0 to pH 6.0. Among the metal ions Ca and Mg were did not affect, whereas K, Cu and Zn show a little effect on the enzyme activity. The ${\beta}$-Galactosidase activities were inhibited by treatment with EDTA and SDS.

• 한국식품저장유통학회지
• /
• 제8권4호
• /
• pp.405-411
• /
• 2001

Monascus속 곰팡이를 이용한 메주의 효소류 활성을 조사하기 위하여 M perpureus와 M. pilasus의 두 균주를 사용하여 쌀 메주와 콩 메주의 효소활성을 조사하였다. M Manascus 백미 및 백미붙말 메주의 효소휴 활성은 전반 적으로 M pilasus를 사용한 경우에 높았다 Prote잃e 활 성응 쌀 분말 메주가 남알상태의 쌀 메주에 비하여 높 았으나. ($\alpha$-amylase, $\beta$-amylase 및 glucoamyJa않는 날알 쌀 메주에서 높았다. 균주 배양액을 사용한 콩 메주는 효소활성온 높았으나 외관적 품질이 양호하지 못히였다. 균주 배양액 10%와 쌀 분말을 0-12% 범위로 챔 가한 결과 prot,않se의 활성온 두 균주 다같이 10%일 때 최대를 나타내었다. ($\alpha$-anylase의 활성은 쌀 분말의 첨가량이 2%일 때 가장 낮았으나 첨가량이 증가할수록 활성이 증가하였다 $\beta$-와nylase와 gluecoamnylase의 훨-성 은 우 균주 다같이 쌀 분말의 첨가량이 증가할수록 감소하였다 메주용 균주로는 M pilosus몹가 양호하였으며 이 균의 쌀 메주 분말을 증자 콩에 10% 되게 첨가 하여 발효시킨 콩 메주는 일반 Aspergillus oryzzae 콩 메주에 비하여 protease 활성은 높았다. 그러나 $\beta$-amylase 와 glueoarnylase는 약 50% 이하의 활성을 나타내었다.

• 한국생명과학회:학술대회논문집
• /
• 한국생명과학회 2001년도 제32회 학술심포지움
• /
• pp.67-86
• /
• 2001

A strain producing strongly fibrinolytic enzyme was isolated from soil and was identified to be Bacillus subtilis by biochemical and physiological characterization. The optimal culture conditions for the production of fibrinolytic enzyme was determined to be 1.0% tryptone, 1.5% soluble starch, 0.5% Peptone, 0.5% NaCl, $(NH_{4})_{3}PO_4.3H_{2}O, and MgSO_{4}.7H_{2}O.$ Initial pH and temperature were pH 8.0 and $30^{\circ}C$ , respectively, The highest enzyme production was observed at 30 hours of cultivation at $30^{\circ}C$ The fibrinolytic enzyme was purified to homogeneity by DEAE Sephadex A-50 ion exchange column chromatography, 70% ammonium sulfate precipitation, Sephadex G-200 and G-75 gel filtration column chromatography. The molecular weight of the purified enzyme was 28,000 as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. A gene encoding the fibrinolytic enzyme was cloned into a plasmid vector pBluescript, transforming E.coli XL-1 Blue. The clone was able to degrade fibrin, This indicated that the gene could encode a fibrinolytic enzyme. The nucleotide sequence of the 2.7 kb insert was determined in both direction. One open reading frame composed of 1023 nucleotides was found to be a potential protein coding region. There was the putative Shine-Dalgano sequence and TATA box upstream of the open reading frame. The homology search data in the genome database showed that both the 2.7 kb insert and 1 kb open reading frame carried no significance in the nucleotide sequence of known fibrinolytic enzyme from Bacillus serovars. The recombinant cell harboring the novel gene involved in fibrinolysis was subjected to protein purification. The molecular mass of the purified fibrinolytic enzyme was determined to be 31864 Dalton, which was highly in accordance with the molecular mass(33 kDa) of the fibrinolytic gene deduced from the insert. The fibrinolytic enzyme was Purified 50.5 folds to homogeneity in overall yield of 10.7% by DEAE Sephadex A-50 ion exchange, 85% ammonium sulfate precipitation, Sephadex G-50, Superdex 75 HR FPLC gel filtration. In conclusion, a novel fibrinolytic gene from Bacillus subtilis was identified and characterized by cloning a genomic library of Bacillus subtilis into pBleuscript. For the soybean fermented by this strain, it is found that there increased assistant protein about 20% compared to the soybean not fermented and increased about 30% according to amino acid analysis and, in particular, essential amino acid increased about 40%. When keeping this fermented soybean powder at room temperature for about 70days, it showed very high stability maintaining almost perfect activity and, therefore, it gave us great suggestion its possibility of development as a new functional food.

• Preventive Nutrition and Food Science
• /
• 제14권4호
• /
• pp.335-342
• /
• 2009

Bioactive compounds were produced from carrot pomace by solid-state fermentation using Bacillus subtilis HA and Leuconostoc mesenteroides. The carrot pomace (CP) fermented by B. subtilis HA with 3% monosodium glutamate (MSG) showed higher production of various bioactive compounds, with 1.64 Pa·sn of consistency, 2.31% of mucilage content, 16.95 unit/g of fibrinolytic enzyme activity, 35.3 unit/g of proteolytic activity and 37.5 mg% of tyrosine content. The mucilage production was greatly dependent upon the concentration of MSG added. Most MSG added in CP was converted into mucilage (2.3%) including 0.83% poly-$gamma$-glutamic acid (PGA) with 1,505 kDa of molecular weight. The CP fermented secondly by Leuc. mesenteroides showed acidic pH and lower consistency. However, the fibrinolytic and proteolytic activities were increased. The secondly fermented CP showed the viable cell counts with $2.5{\time}108$ CFU/g of B. subtilis HA and $3.7{\time}109$ CFU/g of Leuc. mesenteroides, respectively. The freeze-dried fermented CP showed 2.88 Pa·sn of consistency, 24% of mucilage content and 104.9 unit/g of fibrinolytic enzyme activity, respectively. Also, the powder of fermented CP indicated viable cell counts of $8.0{\time}107$ CFU/g of B. subtilis and $4.0{\time}108$ CFU/g of Leuc. mesenteroides. Therefore, the fermented CP that was fortified with dietary fibers, fibrinolytic enzyme and probiotics could be utilized as valuable ingredients of functional foods in food or cosmetic industries.

• 미생물학회지
• /
• 제16권4호
• /
• pp.141-147
• /
• 1978

In order to increase the productivity of cellulolytic enzymes, medium composition and culture conditions were studied. When cellulose powder (Avicel) supplemented with rice straw was used as carbon source, productivity of ${\beta}-glucosidase$ was increased by about 3 times compared with the runs with only cellulose powder as a carbon source. In this case no negative effects on the production of CMC enzyme activity and filter paper activity was found. For the production of celulolytic enzymes using T. reesei QM 9414, casitone was found to be a good nitrogen source compared with other sources studied, such as peptone, yeast extract, tryptone, and casein. The highest cellulase activity was attained when 0.3% glucose and 0.01% Tween 80 were supplemented to the standard medium of Rese. An adequate oxygen transfer rate was also found to be important to the cellulase fermentation and about 50 mmole of oxygen/liter/hour supported good cellulase biosynthesis during cellulase fermentation.

• 한국식품영양학회지
• /
• 제1권2호
• /
• pp.102-107
• /
• 1988

Production of calcium lactate very useful for medical supplies of Ca-therapy was obtained by lactic acid fermentation of lactobacillus sporogenes, a spore forming lactic acid bacterium. Corn steep liquor 1%, soybean enzyme hydrolysate 3%, yeast extract powder 2% can substitute for yeast extract and peptone as nutrient sort traces in fermentation medium using 10% glucose concentration. In the calcium lactate production medium containing yeast extract powder 2%, glucose 18%, CaCO3 12%, the lactic acid fermentation was carried out at 45$^{\circ}C$ for 4days with continuous agitation of 100 rpm. As results, fermentation yield was 97.5%. The five steps such as protein coagulation, decolorizing evaporating, crystallizing, and drying were carried out to harvest calcium lactate from 10l of supernatant of fermented medium to be removed cell and CaCO3. As results, 2065.0g of white crystal calcium lactate dihyrate was recovered and a yield of 84.9% was obtained.

• Applied Biological Chemistry
• /
• 제21권2호
• /
• pp.123-130
• /
• 1978

마늘가루 첨가(添加)가 국균(麴菌)의 각종(各種) 효소생산(酵素生産) 및 생육(生育)에 미치는 영향을 규명(糾明)할 목적으로 Asp. oryzae D(단모균(短毛菌))와 Asp. oryzae H(장모균(長毛菌)) 균주를 마늘가루를 함유하는 밀기울배지 및 Czapek-Dox액체배지에 배양하여 각종효소력(酵素力), 균체생성량(菌體生成量), pH, 적정산도(滴定酸度), 환원당 등(等)을 측정한 결과는 다음과 같다. 1, Asp. oryzae D균주의 경우 산성 protease는 마늘가루첨가농도 $0.5{\sim}2%$범위내에서, 중성 protease는 0.5%, alkali성(性) protease는 $2{\sim}6%$범위내에서 각각 대조구에비하여 활성이 높았다. 2, Asp. oryzae H균주의 경우 각(各) protease의 활성은 마늘가루첨가농도 $0.5{\sim}8%$범위내에서는 대조구와 큰차이가 없었으나 30%에서는 peak를 나타냈다. 3. Asp. oryzae H균주의 경우 마늘가루첨가는 $\alpha$ 및 glucoamylase생성을 증가시켰다. 4. 마늘가루첨가는 국균(麴菌)의 cellulase 생성을 저해(沮害)하였다. 5. 국균(麴菌)의 균체생성량(菌體生成量)은 마늘가루첨가농도 $0.5{\sim}6%$범위내에서 대조구에 비하여 증가하는 경향을 나타냈고 장모균(長毛菌)은 단모균(短毛菌)에 비해 증가현상이 현저하였다. 6. 마늘가루첨가농도가 증가함에 따라 Asp. oryzae D균주는 Czapek-Dox액체배양물의 pH를 저하(抵下)시키는 경향을 나타냈으나 Asp. oryzae H균주는 배양물의 pH를 상승시켰다. 7 마늘가루첨가농도가 증가함에 따라 Czapek-Dox 액체배양물의 정적산도(定滴酸度)는 대체로 증가하였다. 8. 마늘가루첨가농도가 10%이상인 밀기울고체(固體)배지 및 Czapek-Dox액체 배지에서는 국균(麴菌)의 생육은 거의 억제되었다. 9. Czapek-Dox액체배양시(時) 환원당의 이용율은 마늘첨가농도 $1{\sim}2%$범위에서 가장 양호하였다.

• 한국식품영양과학회지
• /
• 제39권2호
• /
• pp.287-293
• /
• 2010

소맥분에 백합 구근분말을 첨가한 물리적 특성은 백합 구근분말 첨가 비율이 증가할수록 farinogram에서 탄력도는 증가하는 경향이었으나, 점탄성, 흡수율, 흡수 시간 및 안정도는 3%이상 첨가 시 증가 후 감소하는 경향을 보였다. Rapid viscoanalyzer(RVA)에서 유지 강도, 최종점도, breakdown, setback 값, alveogram의 $P_{max}$값과 falling number 값은 감소하였다. 소맥분에 백합 구근의 첨가량과 입도 차에 의한 호화도 특성에서 초기 호화온도는 일반 분쇄 및 미분쇄($10\;{\mu}m$) 백합 구근분말의 종류와 양에 관계없이 영향을 미치지 않았다. Rheofermentometer로 측정한 gaseous release는 전체 $CO_2$ 가스 발생량과 보유량이 감소하였다. 기호도 검사에서는 백합 구근분말의 입도와 첨가 비율에 따른 식빵의 가공적성에서 식감, 향미, 맛에서 유의적인 차이가 나타났으며, 촉감과 크럼 색상은 유의적인 차이가 없는 것으로 나타났다. 한편 식빵의 가공 적성에서 일반 분쇄 3%와 초미분쇄 3% 첨가군이 양호하였으나, 종합적인 평가에서는 대조구 다음으로 미분쇄 백합 구근분말 3% 첨가군에서 우수하였다. 이미 백합 구근의 항산화 활성 등 생리활성은 검증되어져 발표되어 있는 만큼 제빵 가공에서 조직감의 문제를 보완하고 개선한다면 건강 기능성 제빵으로 상품화 가치가 있다고 생각된다.

• Journal of Microbiology and Biotechnology
• /
• 제29권4호
• /
• pp.607-616
• /
• 2019

In this study, functionalized poplar powder (FPP) was used as a support material for the immobilization of enoate reductase (ER) and glucose-6-phosphate dehydrogenase (GDH) by covalent binding. Under optimal conditions, the immobilization efficiency of ER-FPP and GDH-FPP was 95.1% and 84.7%, and the activity recovery of ER and GDH was 47.5% and 37.8%, respectively. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analysis indicated that FPP was a suitable carrier for enzyme immobilization. ER-FPP and GDH-FPP exhibit excellent thermal stabilities and superior reusability. Especially, ER-FPP and GDH-FPP enable the continuous conversion of 4-(4-Methoxyphenyl)-3-buten-2-one with $NAD^+$ recycling. While the immobilization strategies established here were simple and inexpensive, they exploited a new method for the immobilization and application of ER and its cofactor recycling system.