스쿠알렌 합성 유전자를 도입한 형질전환 가시오가피

서진욱,정재훈,최용의,이학성,신차균 중앙대학교 유전공학연구소 2003 遺傳工學硏究論集 Vol.16 No.1

The enzyme, squalene synthase, represents a branch point in the isoprenoid pathway capable of diverting carbon flow specifically to the biosynthesis of phytosterol and Triterpenoid. Transgenic Eleutherococcus senticosus plants were prepared by introducing the genes for squalene synthase derived from Panax ginseng (PgSS1), hygromycin phosphotransferase (HPT) and green fluorescent protein (GFP) through Agrobacterium-mediated transformation. Establishment of transgenic plantlets were confirmed by the presence of PgSS1 and HPT bands in the genomic DNA preparation using a PCR method and a Southern blotting. In addition, expression of the introduced GFP DNA was confirmed by observing green fluorescence of GFP from the embroyos. In the in vitro analysis of the PgSS1 enzymatic activities the transgenic plants showed to have 1.5 to 3 times higher than wild type plant, indicating that the PgSS1 genes was well over-expressed in the transgenic plants. Especially the PgSS1 acivities of embroyogenic cell was 120 times higher than those of plantlet.

Deep Submicron nMosfet 설계를 위한 새로운 스케일링 방법에 관한 연구

서용진 대불대학교 1997 論文集 Vol.3 No.1

To achieve the ULSI goals of higher density and greater perfo channel lengths of MODFET have been scaled down. However, the reduction of channel lengths causes undesirable problems, such channel effects, hot-carrier phenomena, and TDDB(time dependent breakdown). These effects, especially in deep submicrometer M make it very difficult to keep leakage current below a requie Therefore, subthreshold current is the dominant short channl peissue that limits MOSFET scaling. In this work, it is tried to design deep submicron MOSFET, using scaling method to achieve a desired value of subthreshold current. An empirical scaling method to achieve subthreshold current was presented, 0.12㎛ gate length nMOSFET's was designed using this method, and the dependence of process parameters and split conditions on device characteristics were examined.

협동학습이 자연과 학업성취 및 과학태도에 미치는 효과

서승조,백남권,조태호,김용진 晋州敎育大學校 科學敎育硏究所 1999 科學敎育硏究 Vol.25 No.-

The purpose of this study is to manifest the effect of STAD cooperative learning which has not yet been explained in cooperative learning of an elementary school, on the academic achievement in science and science related attitudes. Therefore, in order to achieve that purpose, I established the following issues of study. First: What effect does STAD cooperative learning have on the elementary school students' academic achievement in science? Second: What effect does STAD cooperative learning have on the elementary school students' science related attitudes? The results of the study are as follows. First, while it was proven that the effect of STAD cooperative learning on academic achievement in science had no significant difference in pre·post achievement levels for both the experimental group and the control group, the experimental group showed larger changes in the mean value than control group; it can be inferred that classes to which cooperative learning is applied is more effective than traditional science classes. Second, in regard with the effect of STAD cooperative learnign on science related attitudes, while there was a significant difference between the experimental group and control group in pre examination, there was no significant difference, which means STAD cooperative learning does have effect on science related attitudes. In conclusion, the results of this study manifest that STAD cooperative learning is effective for science related attitudes in elementary school science classes, and assume that it can be effective for academic achievement.

제주도 연안 갈치 채낚기 어구의 생력화 : 1.연속식 채낚기어구의 모형 실험

서두옥,정용진,김석종,이창헌,김고환,박용석 제주대학교 해양연구소 2000 해양과환경연구소 연구논문집 Vol.24 No.-

The authors carried out a model experiment of continuoius hairtail hand line on the rooftop in order to obtain the fundamental data on elimination of labor with haritail hand line in the coast of Jeju. The results are as follow ; 1.The continuous main line was rotated smoothly by driving roller. 2.The branch lines and hooks on a main line which was rotated by rotary machine were entangled slightly. 3. The branch lines attached to rubbered model of hairtails to hooks were rotated continuously by the rotary machine.

CMP 공정 결함 및 방지에 관한 연구

서용진 대불대학교 2000 論文集 Vol.6 No.1

STI(Shallow Trench Isolation)-CMP(Chemical Mechanical Polishing) process is gradually substituting for LOCOD(Local Oxidation of Silicon) process to be available below sub-0.5um technology and to get planarization. However STI-CMP process has various defects such as nitirde residue, torn oxide defect, damage of active region, etc. also, the removal rates of each thin films is STI-CMP was not equal, that is, the damage was occurred in the active device area as a result of excessive CMP process, and the nitride film was remained on the active device area in the case of insufficient CMP process. In this work, the various defects induced by CMP process was introduced. and the above mentioned problems of CMP process was explained in detail. Finally, the guideline of future CMP process was presented to reduce the effects of thees defects.

소아기 내과계 질환의 통계적 관찰

서종진,이건수,정용헌 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2

Statistical analysis of medical in-patients of pediatric age from Jan. 1989 to Dec. 1989 was assessed to find out the general patterns and trends of childhood medical diseases at Chungnam National University Hospital. The results are as follows : 1. Total numbers of in-patients were 1266, of which 782 were male and 484 were female. The ratio of male to female was 1.62 : 1. 2. According to the observation on patient distribution by age and departments, the most frequent age group was under 1 month in Pediatrics, 10-15 years of age in Psychiatrt, Rehabilitation Medicine and Neurology, 5-10 years of age in Dermatology. 3. According to the observation on the duraton of admission, more than half were admitted less than 7 days(53%) and most patients were less than 21 days (90.4%). 4. The most common disease of in-patients was pneumonia(8.1%) followed by neonatal hapoxia, prematurity, and acute gastroenteritis. The most common organ system(disease category) was neonatal diseases(26.4%) followed by respiratory diseases(17.4%) and infectious diseases(11.9%). 5. Average duration of admission was 10.9 days. That of Pediatrics was 10.2 days, Dermatology 7.0 days, Rehabilitation Medicine 43 days, Neurology 12.8 days and Psychiatry 20 days.

이중장벽 SiO_(2) 박막 매트릭스 내의 나노스케일 실리콘 입자를 통한 공명 터널링에 대한 연구

서용진 대불대학교 2002 大佛大學校大學院 硏究論文集 Vol.- No.1

The resonant tunneling via nanoscale silicon particles embedded in an oxide matrix was introduced. The nanosale silicon particles were recrystallized by post-annealing and oxidation of a thin amorphous Si layer sandwiched between oxide layers, and then a proper electrical forming process was chosen for observation of electron transport characteristics. To investigate the tunneling nature and the possibility of avalanche multiplication, the I-V and G-V measurements were performed. Consequently, these results are potentially important for silicon based quantum devices. Also, the development of resonant tunneling diode using silicon-superlattice will be play a major role in the design of a Si chip, which is called OEIC (optoelectronic IC), with both electronic and photonic componants.

전어의 보존중 겨자의 처리 효과

서권일,강갑석,이용수,정용진,김용택,심기환 동아시아식생활학회 1996 동아시아식생활학회지 Vol.6 No.2

Effects of mustard seed(Brassica juncea) on the preservation of raw gizzard-shad slice were investigated, morphological change of Vibrio parahaemolyticus treated with water-extract of mustard seed was examined, the results are as following. The pH of raw gizzard-shad slice soaked in water with mustard seed slightly increased during preservation, and the pH was in inverse proportion to the added amount of mustard seed. The number of bacteria and Vibrio of raw gizzard-shad slice treated with mustard seed were lower than control, and the higher the mustard seed concentration, the lower the number of bacteria and Vibrio. The TMA-N content of raw gizzard-shad slice gradually increased during preservation, and the TMA-N was in inverse proportion to the added amount of mustard seed. Scanning electron microscopy of Vibrio parahaemolyticus treated with water extract of mustard seed showed that surface membrane was destroyed with expended ellipsoidal shape.

오징어 내장에서 분리한 Protease 특성의 모니터링

서지형,정용진,이기동,이명희 동아시아식생활학회 1999 동아시아식생활학회지 Vol.9 No.2

The characteristics of protease from squid viscera was investigated by response surface methodology(RSM) programmed with reaction temperature and pH. The optimal temperature and pH for the protease were 41.75℃ and pH 6.02 respectively. Also its activity was 78.65 unit at the optimal condition and R² of the model was 0.8461(P<0.1). The protease activity was decreased by Na^(+) and increased by Mg^(2+). But K^(+) did not affect the protease. The Km value against casein was determined to be 0.12 mM by Line-weaver-Burk plot.

步速變化에 따른 미끄러짐의 생체역학적 연구

서국웅,윤양진,서국은,이중숙,김용재,이언석,이훈식 釜山大學校 附設 體育科學硏究所 1992 體育科學硏究所 論文集 Vol.8 No.-

The purpose of this study was to analyze walking steps to prevent unnecessary energy consuming and prevention of injury from sliding when someone was walking. The questionnaire, high speed video system, E.M.G. system, and force platform system were used to analyze sliding mechanism in biomechanical perspective. Several results were found as following: 1. According to questionnaire regarding sliding, 93.3% of participants have sliding experiences. People have sliding experiences by greasy floor(48.4%) and obstacle (22.5%). Sliding types were found from different kinds of shoes such as sneakers (48.8%) and boots (34.2%). The results were presented as following 44.6% of participants were fall down front direction and 40.3% of people fell down rear side. 2. According to the high speed video system analyzer, step sliding increased with increasing step speed from distance and acceleration speed experiment with 80 steps/min, 100 steps/min, 120 steps/min. Also, the most sliding were occurred with sneakers, boots, and bare feet as order. 3. According to E.M.G. test results, the vastus lateralis M., the vastus medialis m., and the tibialis anterior m. of electric action potential presented strongly when participants fell front, rear, and right side. The vastus lateralis m. and the tibialis anterior m. of electric action potential presented strongly when someone fell left side, but the vastus medialis m. and the gastrocnemius m. of electirc action potential presented as weaker. 4. According to the force platform test results, the most big change of floor antipower of x-axis presented when someone fell the left side. The most of big change of floor antipower of y-axis presented when someone fell down rear side. The most of big change of floor antipower of z-axis presented similarly when someone fell the front, rear, left, and right side.