천연 포도과즙 발효용 식초산균 분리

최경호,정은희 대구효성가톨릭대학교 응용과학연구소 1998 응용과학연구논문집 Vol.6 No.2

포도과즙을 이용한 식초산 생산을 위하여 강한 증식력과 아울러 아황산 소다 및 poly phenol성 물질에 대한 내성을 지니고 산소 요구도가 낮은 발효균주가 요망되었다. 본 연구에서는 이러한 성질을 갖춘 우수한 식초산균을 분리하기 위하여 실험을 수행하였으며 탄산칼슘을 첨가한 ethanol배지와 포도과즙을 이용하여 여러 가지 재래초로부터 식초산균을 분리하였다. 분리균은 단간균 내지 타원형 세균으로 불규칙한 모양을 하고 있으며, 전체적인 모양은 대조군으로 사용한 Acetobacter aceti(KCTC 1010)와 비슷하였으나 크기의 차이가 있다. 분리균의 증식도는 대조균보다 현저히 빨랐으며 paper disc법으로 확인한 clear zone 생성능력(Acetic acid 생성 능력과 비례)은 분리균이 대조균보다 약 11%가 높았다. 분리균은 포도과즙을 산도 6.2%의 포도식초로 발효하였으며, 8일간의 발효과정중 pH는 3.8에서 3.5로 약간 저하되었다. HPLC분석에 따른 발효전과 발효 후의 유기산의 변화는 tartaric acid와 fumaric acid가 약간 증가되었으며, acetic acid는 약 2.5배 증가하여 전체 유기산의 90%이상을 차지하였고 총 유기산의 함량도 증가하였다. 이상의 결과로 본 실험에서 분리한 식초산균은 천연 포도과즙에서 빠르게 증식하여 고동도(6%이상)의 식초산을 생성할 뿐만아니라 pH와 색상의 변화가 적고 정치배양에도 잘 적응하는 우수한 포도식초 발효균으로 판정되었다. Experiments were carried out to isolate a bacterial strain for fermentation of alcoholic grape juice(low grade wine) to vinegar without any drastic changes in color of the products. Among eight strains of bacterium isolated from various sources, a bacterial strain was finally selected as the fermenting organism by using solid-ethanol medium. Cells of the bacterium were rod or ellipsoid-shaped. Microscopic morphology of the cells were very resembled to Acetobacter aceti(KCTC 1010) used as an control organism. The bacterium grew actively in grape juices after a lag phase for 2 hours, and produced acetic acid in accordance with it's growth. Wine vinegar containning 6.2% acetic acid and having typical flavor and color of grape fruit was produced by fermentation for 8 days. These results suggest that the isolated bacterium was an Acetobacter sp. and useful for fermentation of wine vinegar of good quality.

대요근 근구 차단술의 해부학적 고찰 및 임상 효과

신경호,김헌,최락민,김희상,안경회 大韓再活醫學會 2000 Annals of Rehabilitation Medicine Vol.24 No.2

새로운 매체현실과 문화변화

최문규,김회봉,조경식,서규환 한국독일어문학회 2000 독일어문학 Vol.11 No.-

Der Begriff "Medienrealita¨t" ist heute aktuell geworden. Obwohl die Medien zur Vemittlung der Kommunikation auch in der Vergangenheit sehr verallgemeinert worden sind, gelten sie heute nicht mehr als bloβes Mittel. Die Entwicklung der elektronischen bzw. technologischen Medien vera¨ndert sowohl die Realita¨t unserer Welt als auch das Sein schlechthin. Der Begriff "Medienrealitat" ist synonym mit den anderen Begriffen wie "digitaler Schein" bzw. "virtuelle Realita¨t". "Informationsgesellschaft", die den tradierten Gegensatz zwischen Sein und Schein. dem Wahren und dem Falschen auflo¨st und zu einer neuen "Form der Realita¨t" avanciert werden. Um die Medienrealita¨t zu analysieren. werden im zweiten Kapitel die verschiedenen Elemente illuminiert, durch die neue Medienrealita¨t und Kultur konstituiert werden: ganz neue "immaterielle Basis der Information. Macht der Bilder, Geschwindigkeit, neue computerielle Wahrnehmung. "Medienwerk". Diese Elemente beherrschen sowohl die Realita¨t als auch die Kultur. Abschlieβend wird die Mo¨glichkeit reflektiert. wie die Kunst (besonders die Literatur) die Medienrealita¨t u¨berwinden und ihre alternativen Wege ero¨ffnen kann. Im dritten Kapitel wird der Begriff "virtuelle Realita¨t" philosopisch uberpruft, wobei er die Gemeinsamkeiten mit den tradierten philosophischen Begriffen wie "dynamis, "potentia, "virtualite"~possibi1ite usw. teilt. Auch kann der Widerspruch der "virtuellen Realita¨t" besta¨tigt werden, die vor allem auf der radikalen Vera¨nderung von Technik. Information und Kapital basiert. Das heiβt: es ist ein Widerspruch oder die Verhu¨llung der ontologischen Implikation, daβ die virtuelle Realita¨t durch die allma¨hliche Negierung ihrer Virtualita¨t zur Realita¨t erhoben wird. Im vierten Kapitel wird das Verha¨ltnis der Gesellschaft zu Umwelt. Information und Medien aus der Sicht der Luhmannschen Systemtheorie betrachtet. Daraus ergibt sich. dass die Gesellschaft als Sozialsystem bei ihrer Selbstreproduktion mit der Leitdifferenz von System/Umwelt operiert und damit die elbstreproduktion der Gesellschaft von der Vera¨nderung ihrer Umwelt (Technik, Bewuβtsein, Organismus usw.) abha¨ngig ist. Dabei ist deutlich, dass Medien (Schrift. Buchdruck. Elektronik usw.). die zur Verbreitung der Informationen dienen, bei der Evolution der Gesellschaft eine entscheidende Rolle gespielt haben. Schlieβlich handelt es sich um die unterschiedlichen soziologischen Theorien u¨ber das Verhaltnis von Medien und Gesellschaft. In den Vordergrund treten dabei die Theorien von D. Bell und M. Poster. Bells Theorie der postindustriellen Gesellschaft behandelt die Entwicklung der Technologie. die heute die Kultur und die Gesellschaftsstruktur stark vera¨ndert. Gegen Bell postuliert Poster eine Wende von der Produktionsweise zur Informationsweise, indem er die erwandtschaft mit der postmodernen Theorie teilt. Seiner Perspektive zufolge gilt heute nicht das Kapital. sondern die Information als Hauptmovens der Gesellschaft. Die Medien ko¨nnen weder das Absolute noch die Utopie sein. Was der Euphorie der sog. "idealen Entwicklung der Medien" kritisch gegenu¨berstehen kann. ist nichts anderes als die kritische Reflexion der Kunst.

양측성 관상동정맥루 1예

최용원,오석규,이재훈,이상재,권경희,최은경,김남호,정진원 圓光大學校 醫科學硏究所 2002 圓光醫科學 Vol.17 No.1

저자들은 호흡곤란, 흉부불쾌감, 심계항진 등을 주소로 내원한 환자에서 경흉부 및 경식도 심초음파 검사상 주폐동맥에서 이완기에 전행하는 지속적인 혈류의 흐름을 관찰하고, 관상동맥 조영술을 통해 좌전하행지 중간부위와 우관상동맥 근위부에서 각각 기시하여 공통경로를 이루면서 주폐동맥으로 유입되는 양측성 관상동정맥루를 보이는 드문 1예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. A coronary arteriovenous fistula is infrequently encountered vascular communication between a coronary artery and a cardiac chamber, a great artery or the vena cava. It is the most common congenital anomaly that can affect coronary perfusion. Bilateral involvement of coronary fistula constitutes an uncommon subgroup of coronary arteriovenous fistulas. A 69 year-old female patient presented with chest discomfort, palpitation, and dyspnea. In the echocardiography, doppler color flow imaging visualized abnormal flow signals with mosaic appearance in the main pulmonary artery during diastolic phase. Coronary angiography revealed arteriovenous fistula arising from the left anterior descending artery and the right coronary artery. Both coronary arteriovenous fistulas drained into the main pulmonary artery. We report a case of bilateral coronary arteriovenous fistula that was confirmed by echocariography and coronary angiography.

한국인의 ABO Blood Groups 중 A Subgroups에 관한 연구

최범열,엄혜경,김경희 대한임상병리사협회 2001 대한임상병리사회지 Vol.21 No.1

수술중 수혈환자에 대한 임상적 고찰(Ⅲ)

최세진,서경덕,조희경 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2

Over the Past several decades blood and blood components have been increasingly, recognized as medication rather than innocuous fluids used to replace modest blood lose at operation. But blood transfusions have the potential for many harmful side effects. This study was undertaken to evaluate transfusion accordings to department, sex, preoperative hemoglobin values, blood type, transfusion amounts and blood component therapy. Of a total 34.906 operative cases, 5,793 patients who recived a transfusion during operation were analyze statistically at the Department of anesthesiology, chungnam National University Hospital from January 1985 to September 1992. The results were as Follows : 1) The numbers of transfused patient among the 34,906 operative cases were 5,793 cases (16.57%). 2) The number of male transfused was greater than of female and third decade patients was the greatest incidence among the transfused patients. 3) Mostly hemoglobin value in preoperative state was maintained more than 10 mg/dl (85.75%). 4) The blood types of transfused blood were in the great order of A, B, O, AB type. 5) The percentage of one pint transfusion was gradually decreased and 2~5 pints transfusion was greatest percentage (60.11%). 6) As the amount of blood transfused was increased, the percentage of blood component therapy was increased, and mixed case PRC and FFP was the greatest incidence (46.02%).

지르코니아 필러를 첨가한 복합레진의 기계적 성질에 관한 연구

류경희,최호영,최경규,박상진 대한치과보존학회 2000 Restorative Dentistry & Endodontics Vol.25 No.3

The purpose of this study was to evaluate the infulence of incorporation of zirconuim-silicate on diametral tensile strength, shear bond strength to the enamel, and depth of cure of 7 experimental composites. One group contained no filler(group l or control group) , and the other 6 composites contain 75% filler in which zirconium-silicate(Zr-Si) were 0%, 2%, 4%, 6% . 8%, 10% with reduced contents of silica filler resfectively. Both of fillers were treated with 1% silane ( r-methacryloxypropyltrmethoxy silane) . Light curable monomers were prepared by mixing BiS-GMA and TEGDMA with 3 : 1 ratio and adding camphoro quinnone (CQ) 0.6% with tertiary amine 0.3% . Diametral tensile strengths of specimens with 3mm ×6mm were measured with Instron (No.4467, USA) with 1mm/min crosshead speed. Shear bond strengths of composites which bonded to bovine enamel etched with 37% phosphoric acid were measured at Instron Testing Machine with as same speed as in diametric tensile strengths. Depth of cure were measured by a method that composite was filled in cylinder mold, illuminated at one side, and uncured composite was removed with acetone, and the residual thickness of composite was measured. Following results were obtained : 1.Composites containing 0% , 2% , or 4% zirconium-silicate filler(group 2, 3 and 4) showed the statistically higher diametric tensile strength than the others. (p〈0.05) 2.Increase of zirconium-silicate filler contents reduced the diametric tensile strength of experimental composites. (r2=0.8721, p=0.0002) 3.Increase of zirconium-silicate filler contents did not affect the shear bond strength of experimental composites. (r2=0.2815, p =0.4067) 4.Increase of zirconium-silicate filler contents reduced significantly the depth of cure of experimental composites. (r2=0.9700, p〈0.0001) These results mean that the mechanical propel-ties of composites could not be improved by incorporation of small amount of zirconium-silicate filler. Also, the increased contents of zirconum-silicates fillers was found to reduce the diametric tensile strength and depth of cure.

효과적인 유역관리를 위한 CN기법 기반의 침투량 산정 및 기저유출량 분석

김희원 ( Hee Won Kim ),신연주 ( Yeon Ju Sin ),최정헌 ( Jung Heon Choi ),강현우 ( Hyun Woo Kang ),류지철 ( Ji Chul Ryu ),임경재 ( Kyoung Jae Lim ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.4

Increased Non-permeable areas which have resulted from civilization reduce the volume of groundwater infiltration that is one of the important factors causing water shortage during a dry season. Thus, seeking the efficient method to analyze the volume of groundwater in accurate should be needed to solve water shortage problems. In this study, two different watersheds were selected and precipitation, soil group, and land use were surveyed in a particular year in order to figure out the accuracy of estimated infiltration recharge ratio compared to Web-based Hydrograph Analysis Tool (WHAT), The volume of groundwater was estimated considering Antecedent soil Moisture Condition (AMC) and Curve Number (CN) using Long Term Hydrologic Impact Assessment (L-TH1A) model. The results of this study showed that in the case of Kyoung-an watershed, the volume of both infiltration and baseflow seperated from WHAT was 46.99% in 2006 and 33.68% in 2007 each and in Do-am watershed the volume of both infiltration and baseflow was 33.48% in 2004 and 23.65% in 2005 respectively. L-TFIIA requires only simple data (i.e., land uses, soils, and precipitation) to simulate the accurate volume of groundwater. Therefore, with convenient way of L-TKIA, researchers can manage watershed more effectively than doing it with other models. L-THIA has limitations that it neglects the contributions of snowfall to precipitation. So, to estimate more accurate assessment of the long term hydrological impacts including groundwater with L-THIA, further researches about snowfall data in winter should be considered.

전력 케이블용 반도전층 재료의 열분석 특성

이경용,양종석,최용성,박대희 원광대학교 2005 論文集 Vol.35 No.-

To measure modulus and damping of semiconductive materials in power cable, we have investigated the modulus and damping of semiconductive materials showed by changing the content of carbon black. Then they were produced as sheets after pressing for 20 minutes at 180[℃] with a pressure of 200[kg/㎠]. The content of conductive carbon black was the variable, and their contents were 20, 30 and 40[wt%], respectively. The modulus and Tanδ experiments were measured by DMA 2980. Ranges of measurement temperature from -50[℃] to 100[℃] and measurement frequency is 1[Hz]. The modulus of specimens was increased according to a increment of a carbon black content. And modulus was rapidly decreased at the glass transition temperature. The tanδ of specimens was decreased according to a increment of a carbon black content.

Diazepam과 Lidocaine이 노인환자의 기관내삽관시 심전도 및 심맥관계에 미치는 영향

김경희,권성범,신용섭,최세진 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.1

We selected at random 30 geriatric patients who had received operation under the general anesthesia with endotracheal intubation. The patients were divided into 3 groups. Group 1 (control) had received endotracheal intubation without diazepam and lidocaine. Group 2 had received endotracheal intubation with diazepam. Group 3 had received endotracheal intubation with lidocaine. The changes of arterial blood pressure and pulse rate, and the appearance of arrhythmia were compared in each group. The results were as follows : 1. The increase of blood pressure and heart rate were less in group 2, 3 than the control group which showed significant increase of blood pressure and heart rate with endotracheal intubation. 2. The incidence of arrhythmias with endotracheal intubation was less in group 2(20%), group 3(50%) than the control group(80%). 3. The electrocardiographic change in the group 2 and 3 were not significant compared to group 1(control).