미생물을 이용한 해조류의 가수분해 및 이용 : Ⅱ. 돌가사리, 톳 및 가시파래를 가수분해시키는 미생물군의 탐색 Ⅱ. Screening of Microfloras Involved in Hydrolysis of Seaweed Tenella, Seaweed Fusiforme and Green Laver

김해섭,배태진 한국식품영양학회 2002 韓國食品營養學會誌 Vol.15 No.3

해조류 조직을 가수분해시켜 기호성 및 응용성이 높은 액상원료로 가공하는 기술 개발의 일환으로 우선 자연계에 존재하는 미생물로서 산, 논, 밭, 해변 및 어판장에서 약 200종류의 미생물군 시료를 수집하여 해조의 조직파괴가 인정되는 8군의 미생물 시료를 사용하여 돌가사리, 톳 및 가시파래의 조직파괴와 가수 분해 가능성에대하여 검토하고, 추출액 중의 전당과 환원당을 측정하여 추출율과 분해율을 비교하였다. 그 결과 돌가사리, 톳 및 가시파래의 전당 추출량과 추출율은 각각 담수에서 채취한 미생물군 시료 (No. 27번), 부식한 식물에서 채취한 미생물군 시료 (No. 8번) 및 담수에서 채취한 미생물군 시료가 가장 높은 값을 나타내었고, 환원당의 추출량과 시료가 가장 높은 값을 나타내었고, 환원당의 추출량과 추출율에서는 각각 8번, 8번 및 27번 미생물 군 시료가 가장 높은 값을 나타내었다. 분해율은 전당의 추출율도 상당히 높으면서 환원당의 추출이 가장 높았던 실험구들이 각각의 해조에서 가장 높은 분해율을 나타내는 결과를 얻었다. 따라서 이들 자연계에서 채취한 미생물군 시료중에 해조 조체를 파괴시키고, 또한 해조에 다량 함유되어 있는 당을 비롯한 유용성분의 추출을 용이하게 하며, 해조를 가수분해시키는 효소를 가진 미생물이 존재할 것으로 판단되었으며, 또한 이들 미생물군에서 단일 또는 복합 해조가수분해 미생물 및 효소의 생산이 가능할 것으로 기대되었다. The purpose of this study is screening of microfloras involved in hydrolysis of seaweed tenella, seaweed fusiforme and green laver. This is a part of studies on the hydrolysis of seaweed using microorganisms. First, about two hundred microflora samples were obtained from mountain, rice field, dry field, sea, seaside and fish market in the vicinity of Yeosu. Thiry-three microflora samples were screened from the destruction of tissue in sea tangle and sea mustard . It was sufficient that results of the naked eye observation were obtained at eight microflora samples as a feces of bull, a decayed pine tree, a soil of dry field, the mud of the banks in a rice field, the water of a ditch in a rice field, the weed of the banks in a rice field, the water in a rice field and leaved in the air. Above all, extraction rate and contents of reducing sugar in extracts of seaweeds added a decayed pine tree (sample No. 8) and the water of a ditch in a rice field (sample No. 27) were showed high value. And the value of chemical analysis of the sample is much better in comparison with control. Accordingly the hydrolysis of seaweed using mcriorganisms in the inside of these microflora samples can be possible.

다시마 액즙 제조

김명희,이영재,강훈이,강동수,김해섭,배태진 여수대학교 1998 論文集 Vol.13 No.2

This study was intended to raise solids yield in the sea tangle extract. Sea tangle extracted by additions of acetone, methyl alcohol, isopropyl alcohol and ethyl alcohol. Among four solvents used for sea tangle extraction, the optimal solvent was ethyl alcohol. The most appropriate method of sea tangle extraction was two-stage extraction, that extracted with addition of ethyl alcohol and residue was extracted with water(1:13, w/v). As the optimal conditions of ethyl alcohol were 25℃ and 70%, respectively. The basis of solids yield in sea tangle extract, optimal extracting time was about 1 hour. The yield of soluble solids under above-mentioned conditions was 18.2%. Drinking product was made by adding 0.1% citric acid, 2% sorbitol and 2% oligosaccharide to the sea tangle extract(Brix 10).

다시마 액즙의 추출조건

김명희,이영재,강훈이,강동수,김해섭,배태진 여수대학교 1998 論文集 Vol.13 No.2

To improve the utilization of sea tangle, the processing conditions of extracts, such as kind of additives, particle size of a sample, sample to solvent ratio, extracting temperature and time were studied. Among five extracting methods used for sea tangle extraction, the optimal method was water extraction. The most appropriate particle size of sea tangle powder, extracting temperature and mixing ratio of sea tangle to water were 5 mesh, 60℃ and 1 to 13(w/v), respectively. The basis of solids yield in sea tangle extract, optimal extracting time was about 2 hours. The yield of soluble solids under above-mentioned conditions was 5.1%.

일반외과계의 Ceftriaxone 투여 환자에 대한 임상적 관찰

손기섭,김완식,박혜덕,목우균,최길돈 최신의학사 1987 最新醫學 Vol.30 No.3

충남대학교병원 마취발전의 경향에 관한 분석 : 1967년부터 - 1996년까지 from 1967 to 1996

최세진,김상수,정규돈,윤석화,신용섭,손수창,이원형,김혜자,이정은 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.2

To evaluate the specificity and historical trends of the anesthesia in Chungnam National University Hospital, anesthetic experiences of 83,572 in total performed at Chungnam National University Hospital from January 1967 to December 1996 were analyzed statistically and clinically according to age, sex, surgical department, physical status, elective and emergency surgery, premedicants, IV anesthetics, anesthetic methods, inhalational anesthetics, muscle relaxants. The results were as follows : 1. The number of cases has been steadily increased year by year. 2. The ratio of male to female was 52.8% : 47.2%. 3. According to the age, There were 44,905 cases (54%) in the group of 13-45 years. 4. According to the ASA classification of physical status, most of the cases were belonged to the class 1 & 2 (72.5%). 5. The ratio of elective to emergency was 79.4% to 20.6%. 6. Recently, glycopyrrolate has been used increasingly. 7. Thiopental sodium has been mainly used for intravenous induction agent. 8. General anesthesia has been used mainly. 9. Enflurane is the most common inhalational anesthetic agent. but Isoflurane has been used increasingly. 10. Most of muscle relaxants are Pancuronium & Vecuronium(84.5%).

새고막을 이용한 분말조미료 가공

오영열,강동수,김해섭,김경은,최옥수,배태진 여수대학교 산업기술지역개발연구소 2000 産業基術硏究所 論文集 Vol.9 No.-

Conditions for processing dried condiments with bloody clam were investigated. The enzymatic hydrolysis for 1 hour was more profitable than hydrothermal extraction to develop flavoring matters from bloody clam. As a result of omission tests, nucleotides were predominated in the taste compounds of bloody clam hydrolysates rather than free amino acids, and the contribution of nucleotides and free amino acids to the taste of bloody clam hydrolysates was remarkable. The major flavoring components of bloody clam hydrolysates were free amino acids and oligopeptides below 500 dalton. When bloody clam hydrolysates were separated with membrane(molecular weight cutoff 500 dalton) for recovering flavor, recovering yields of amino type nitrogen were 92.4%. Proximate compositions of dried condiments prepared with protease hydrolyzed bloody clam were moisture content 3.6%, total nitrogen were 71.2% amino nitrogen were 47.8%. And drying yield, solubility and absorption rates at Aw 0.88 were 21.4%. 86.3% and 6.6%, respectively.

한국과 C.I.S 우수 레슬링 선수들의 엉치걸이 동작에 대한 운동학적 요인 분석

윤희중,전해섭,김동건,김영란 韓國體育大學校附屬 體育科學硏究所 1992 韓國體育大學校附屬 體育科學硏究所論文集 Vol.11 No.1

This study investigated kinemtic factors of hip throw as a representative skill to make a comparative study between Korean and C. I. S wrestlers Four elite wrestlers were filmed using high - speed cinematography. Kinematic data for the each phase were derived from the digitized film. Analyzing variables included center of gravity(CG) displacement and velocity, hip joint, angular displacement and angular velocity The results were as followers ; 1. Elapse time of CG at conducting hip throw were showed similar result between two nations. 2. C. I. S wrestlers showed more displacement than Korean wrestlers in the harizontal phase (P<0.001) but, Korean wrestlers showed large movemnet, in the vertical phase(P <0.001). 3. In average velocity at whole phase, Korean wrestlers showed rapid velocity in the vertical phase(P<0.001) but, C. I. S wrestlers at conducting throw partner down showed rapid velocity in the horizontal phase(P<0.05). 4. C. I. S wrestlers showed large angular displacement in the hip joint at Ph. I. (P <0.001). 5. C. I. S wrestlers showed rapid angular velocity in the hip joint at Ph. I (P<0.001).

Versatile approaches to tune a nanocolumnar structure for optimized electrical properties of In₂O₃ based gas sensor

Han, Soo Deok,Noh, Myoung-Sub,Kim, Sangtae,Shim, Young-Seok,Song, Young Geuon,Lee, Kwangjae,Lee, Hae Ryung,Nahm, Sahn,Yoon, Seok-Jin,Kim, Jin-Sang,Kang, Chong-Yun Elsevier 2017 Sensors and actuators. B, Chemical Vol.248 No.-

<P><B>Abstract</B></P> <P>In this study, we demonstrate tuning of electrical properties and sensing responses of In<SUB>2</SUB>O<SUB>3</SUB> nanocolumnar structure via varying glancing angle (GLAD) deposition conditions by e-beam evaporator. The varied deposition conditions include glancing angle, vacuum level and deposition rate. The electrical property of In<SUB>2</SUB>O<SUB>3</SUB> nanostructured thin films, demonstrated by the base resistance, change up to 3 orders of magnitude from 110Ω to 103104Ω depending on the porosity of nanocolumnar structure and oxygen vacancy concentration. This variation in electrical property transfers to the tuning of gas sensing response, and we achieve tuning the same material (In<SUB>2</SUB>O<SUB>3</SUB>) based gas sensors to better perform for specific type of gases (either oxidizing or reducing). The highest responses achieved in this work reached up to 176 for oxidizing gases (5ppm NO<SUB>2</SUB>, R<SUB>gas</SUB>/R<SUB>air</SUB>) and 929 for reducing gases (50ppmC<SUB>2</SUB>H<SUB>5</SUB>OH, R<SUB>air</SUB>/R<SUB>gas</SUB>). Therefore, we demonstrate that gas sensors can be optimized for specific type of target gases with the same material, via simple control of deposition conditions. Along with the high reproduciblility and sensitivity, this puts the nanocolumnar thin film based gas sensors by GLAD with huge potential for further miniaturization and mass production, suitable for the upcoming IoT era.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Nanocolumnar In<SUB>2</SUB>O<SUB>3</SUB> thin film based gas sensor is fabricated by glancing angle deposition (GLAD). </LI> <LI> Electrical properties of In<SUB>2</SUB>O<SUB>3</SUB> can be optimized for specific target gases, tuning simple deposition conditions of GLAD. </LI> <LI> In<SUB>2</SUB>O<SUB>3</SUB> sensors have excellent performances with high repeatability, recovery, and extremely low detection limit. </LI> </UL> </P>

Downsizing gas sensors based on semiconducting metal oxide: Effects of electrodes on gas sensing properties

Song, Young Geun,Shim, Young-Seok,Kim, Sangtae,Han, Soo Deok,Moon, Hi Gyu,Noh, Myoung Sub,Lee, Kwangjae,Lee, Hae Ryong,Kim, Jin-Sang,Ju, Byeong-Kwon,Kang, Chong-Yun Elsevier Sequoia 2017 Sensors and actuators. B Chemical Vol.248 No.-

<P><B>Abstract</B></P> <P>We report the highly sensitive and selective downsized gas sensors for the IoT application. Sensing areas of Pt-interdigitated electrodes (IDEs) were varied to investigate the relation between sensing materials and electrodes. In<SUB>2</SUB>O<SUB>3</SUB> nanocolumns were deposited on the pre-patterned Pt IDEs using glancing angle deposition (GLAD). The effect of the interface resistance between electrodes and sensing materials, and the intergrain resistance between nanocolumns is analyzed by linear regression at different sensing area and incident angle of GLAD. In<SUB>2</SUB>O<SUB>3</SUB> (angle: 85°, sensing area: 0.3mm×0.3mm) nanocolumns with double Schottky barriers show the highest response and selectivity with fast response time of 10s to VOCs among the samples fabricated in this study. The analysis reveals that the intrinsic response of In<SUB>2</SUB>O<SUB>3</SUB> (angle: 85°, sensing area: 0.3mm×0.3mm) nanocolumns are dominantly affected by intergrain resistance, resulting in a high response. Our demonstration for the fundamental aspect of downsizing gas sensor makes an important contribution to the chemical sensor field with broad interest.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The sensing areas are varied to investigate the relation between sensing materials and electrodes. </LI> <LI> The effect of the interface resistance and the intergrain resistance are analyzed by linear regression. </LI> <LI> The performance of the downsizing gas sensor is greatly influenced by the interface resistance. </LI> </UL> </P>

나노급 초소형위성 우주환경시험 : 결과 및 교훈

김해동(Hae-Dong Kim),최원섭(Won-Sub Choi),김민기(Min-Ki Kim),김진형(Jin-Hyung Kim),김기덕(KiDuck Kim),김지석(Ji-Seok Kim),조동현(Dong-Hyun Cho) 한국항공우주학회 2021 韓國航空宇宙學會誌 Vol.49 No.11

최근 New Space 시대를 맞이하여 초소형위성이 위성시스템 교육용 도구에서 벗어나 민간 우주산업체, 정부 기관 및 군정찰 기관에서도 우주 비즈니스 및 실질적인 임무 수행을 위해 활용되는 추세이다. 국내에서도 대학을 중심으로 시작한 초소형위성 개발이 점차 민간 산업체를 비롯하여 다양한 주체들이 시도하고 있다. 하지만 초소형위성의 임무 성공 가능성을 높일 수 있는 우주환경시험의 수행 준비 과정과 시험 결과 그리고 그 과정에서 발생되어 질 수 있는 여러 가지 문제들에 대해 정리되고, 그 경험을 공유할 수 있는 자료를 국내에서 찾기가 쉽지 않다. 본 논문에서는 국내 최초로 개발되고 있는 6U급 초소형위성(SNIPE)의 우주환경시험의 준비부터 시험 수행 과정, 시험 결과 그리고 문제점들을 정리함으로써 나노급 초소형위성(Nanosatellite)을 개발하고자 하는 주체들이 시행착오를 줄이고 임무 성공 가능성을 높이는 데 유용한 참고자료로 활용되기를 기대한다. In the recent New Space era, Nanosatellites are being used to carry out space business and practical missions by private space companies, government agencies and military reconnaissance organizations, away from satellite system education tools. In Korea, the development of nanosatellite satellites, which started with universities at the center, is gradually being attempted by various subjects, including private industries. However, it is not easy to find relevant information to share the experience and prepare for the space environment test, test results, and the various problems that may arise in the process, which can increase the chances of mission success for nanosatellites. In this paper, we expect that the subjects who want to develop the nanosatellite(SNIPE) will be used as useful references for reducing trial and error and increasing the possibility of mission success by organizing the 6U-class space environment test, test process, test results and problems.