• 한국식품영양과학회지
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• 제12권4호
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• pp.387-394
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• 1983

zymolyase(${\beta}-1$, 3-glucanase)의 효모(酵母) 세포벽(細胞壁)에 대한 용해작용(溶解作用)을 촉진(促進)시키는 인자(因子)를 zymolyase의 조효소(粗酵素)로부터 분리(分離)하여 Sephadex G-75 gel 여과(濾過) 및 조제용(調製用) PAG-전기영동법(電氣泳動法)에 의하여 전기영동적(電氣泳動的)으로 균일(均一)하게 정제(精製)하였다. SDS-PAG 전기영동법(電氣泳動法)에 의하여 측정한 정제(精製) 인자(因子)의 분자량(分子量)은 40,500이었고, 등전점(等電點)은 pH 9.6이었다. 정제(精製)된 촉진인자(促進因子)는 395개(個)의 아미노산 잔기(殘基)로 구성(構成)되는 단일(單一) polypeptide의 염기성(鹽基性) protease임이 밝혀졌으며, 이 protease의 흡광계수(吸光係數)($E_{208,cm}^{1%}$)는 11.9, 분자흡광계수(分子吸光係數)(${\varepsilon}_{280,}mole/l$)는 $4.83{\times}10^4$이었다.

• Journal of Microbiology
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• 제35권4호
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• pp.354-359
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• 1997

Methods for the extraction of DNA from water sample were approximated. Four different procedures of DNA extraction were carried out with pellets obtained from centrifugation of 4 liter water samples. The recovery efficiency and purity of DNA extracted by each method from different sources were compared. DNA yield varied with extraction methods, Method I, which involves enzymatic and freeze-thaw lysis steps and phenol and phenol-chloroform purification of extracted nucleic acid, showed a significantly higher yield and purity than the other methods. The use of glass beads in the DNA extraction methods improved the purity of DNA suitable for PCR. Bovine serum albumin in the PCR reaction mixture was useful in reducing inhibitory effects of contaminants. The efficiency of an extraction method was determined by the detection of the aer of Aeromonas hydrophila with PCR. The lower limit of detection of A. hydrophila from seeded tap water was 2 CFU/ml in PCR when method I was used for DNA preparation.

• Preventive Nutrition and Food Science
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• 제1권2호
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• pp.269-277
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• 1996

Bacteriocins are proteins produced by a heterogeneous group of bacteria that have a bactericidal effect on closely related organisms. Recently, bacteriocins from lactic acid bacteria and other food-related organisms have been the subject of much research because of their potential as food biopreservatives. Various modifications of agar plate diffusion assays are the most widely used methods even though the limitations of such assays are generally recognized. The ability to obtain a concentrated crude preparation on bacteriocin by optimizing production parameters greatly simplifies recovery of bacteriocin on subsequent purification steps. Some studies performed to optimize bacteriocins have been purified to homogeneity, and the amino acid sequences of many of these purified bacteriocins have been determined. Obtaining characterization data on purified bacteriocin will minimize the risk of overlapping of research and confusion on identification of these compounds. Several me-chanisms leading to cell death have been hypothesized. These include depletion of the proton motive force(PMF) across the cell membrane: RNase and/or DNase activity within the sensitive cell; and pore formation and lysis of sensitive cells at the cell membrane.

• Journal of Acupuncture Research
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• 제25권3호
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• pp.87-94
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• 2008

Objectives : This study was to compare the effect of moxibustion therapy on peripheral facial para- lysis according to location of acupoint. Methods : We investigated 41 cases of inpatients with Peripheral Facial Paralysis, and divided them into two groups, One group was treated by moxibustion on local point(ML), and the other was treated by moxibustion on distant point(MD). We evaluated the effect of moxibustion in each group by using Gross Grading System of House-Brackmann(HB score) and Yanagihara's Unweighed Grading System(Y score). Results : 1. In ML and MD, compared with baseline, at final, HB score was significantly decreased and Y score was significantly increased. 2. At final, ML showed significant decrease on HB score and significant increase on Y score compared with MD. Conclusions : These results suggested that ML should be more useful for improving symptoms related with peripheral facial paralysis than MD.

• 정보관리학회지
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• 제9권2호
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• pp.118-153
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• 1992

대학 도서관의 대출 업무에 관한 시스템 연구를 수행함에 있어 구조적 분석 기법을 이용하여 현행 대출 업무를 분석하고 새로운 대출 시스템을 설계하였다. 기존 대출 업무 분 석에서는 구조적 개발 도구인 자료 흐름도와 자료 사전, 실체 관계도들을 기용하여 데이터 분석을 시도하였으며 시스템 설계에서는 분석한 데이터 구조를 데이터 표준화 작업을 통해 새 시스템의 논리적, 물리적 데이터 모델을 제시하였다.

• 대한수의학회지
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• 제30권1호
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• pp.29-33
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• 1990

The study was attempted to scrutinize the normal osmotic fragility of erythrocyte in the domestic ruminants, making a comparison with that of human and canine. The animals used in the experiment were apparently healthy adult Holstein cattle, Korean native cattle, sheep (Corriedale) and Korean native goats. Osmotic fragility of erythrocytes was the highest in the Korean native goats, and the next were sheep and Korean native cattle, and Holstein cattle in order. In other words, erythrocytic resistance to osmotic lysis was the strongest in Holstein cattle and the most weak in Korean native goats among the domestic ruminants. In general, resistance of erythrocytes was stronger in human and canine than in the domestic ruminants.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2001년도 추계학술발표대회
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• pp.582-585
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• 2001

Yeast 유래의 미생물 생리활성물질(GL)에 대한 살조특성은 다음과 같다. C. polykrikoides 및 3종의 와편모조류에 대한 운동성 저해는 $MT_{50}$은 S. trochoidea 는 5${\mu}g/ml$에서 5분 이내에, P. minimum 및 H. akashiwo는 30 ${\mu}g/ml$에서, C. polykrikoides는 200${\mu}g/ml$에서 5분 전후로 나타났으며, 이로 인해 저농도에서 와편모조류의 저해가 가능했다. 와편모조류의 사멸효과는 최종농도 10${\mu}g/ml$ 이상에서 와편모조류의 대부분의 살조가 나타났으며, 살조유형을 조사한 결과, GL이 와편모조류의 세포벽을 직접적으로 공격함으로써 세포벽의 파괴를 야기함을 알 수가 있었다.

• Journal of Plant Biology
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• 제36권4호
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• pp.327-335
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• 1993

The active sites, intracellular transport, function of cellulase in association with the disintegration of the storage materials of the endosperm cells during seed maturation and after-ripening of Panax ginseng C.A. Meyer seeds were studied by electron microscopy. Cytochemical activities of the cellulase occurred in protein bodies and vesicles of endosperm cells in seed with red seed coat. In after-ripening seed, the activities were strongly found in the cell wall of endosperm near the umbiliform layer and on neighbouring vesicles, so it is assumed that these cells begin to be decomposed. Cellulase activities were initiated before the decomposition of storage materials. But, no activity was observed in the umbiliform layer, so it is suggested that cellulase lose its activity after the completion of lysis process.

• Biomolecules & Therapeutics
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• 제1권2호
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• pp.196-203
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• 1993

We compared in vitro antibacterial activity of DWC-751, a new parenteral cephalosporin antibiotic, with those of cefpirome (CPR), cefotaxime (CTX) and ceftazidime (CAZ). DWC-751 showed a broad antimicrobial spectrum against Gram-positive and negative bacteria. The antibacterial activity of DWC-751 against Stapylococcus aureus was equal to that of CPR and superior to those of CTX and CAZ. The activity of it against Excherichia coli was more potent than those of CPR, CTX and CAZ. Against Pseudomonas aeruginosa, DWC-751 was slightly inferior to that of CAZ and superior to those of CPR and CTX. The antibacterial activity of DWC-751 was superior to those of CPR, CTX and CAZ against clinical isolates and ofloxacin resistant strains. DWC-751 showed bactericidal action against Escherichia coli at concentrations close to the MIC and induced the formation of filament and burge and lysis of Escherichia coli in a microscopic examination.

• Preventive Nutrition and Food Science
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• 제17권1호
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• pp.78-82
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• 2012

Antithrombotic and fibrinolytic activity of natto was evaluated on platelet aggregation in vitro and in vivo. Natto showed inhibitory effects on platelet aggregation induced by adenosine 5’diphosphate (ADP) and collagen. Orally administered natto also showed fibrinolytic activity in hypercholesterolemia rats. Normal levels of natto, when administered for four weeks, shortened euglobulin clot lysis time (ECLT) and prolonged partial thromboplastin time (PATT) significantly compared to non-treated group. In addition, the natto treatment decreased total cholesterol in serum. These results showed that intake of normal levels of natto can elicit antithrombotic and fibrinolytic effects, suggesting its consumption may improve blood circulation.