암석에 관한 초등학교 학생의 개념

한영욱,장임정 부산교육대학교 과학교육연구소 2002 科學敎育硏究 Vol.27 No.-

The purpose of this study is to investigate students' conceptions on the rock and the difference of conceptions by sex and also to provide the basis of effective learning strategies to correct their misconception. For this study, 48 students were selected from 6th grade of one elementary school in Busan. Data were obtained by questionnaire which is consisted of ten questions on rocks. The results of this study were as follows : 1. Girls were better than boys in the conception about formation of soil. 2. Students didn't have a correct basis of sedimentary rock to be formed. 3. More than 50% students had wrong conception about deposition order. 4. Girls had wrong conception about the formation cause of a metamorphic rock and boys had wrong conception about gneiss. 5. Student' preconception didn't easily change the conceptions to rock cycle. 6. It was found that students had the varied preconceptions on rock and expressed as empirical and visual view rather than scientific expression of the concepts. They had also misconceptions about composition and rock cycle. 7. For sex, girls and boys had similar scientific conceptions. Academically high and middle ranking group had scientific conceptions about rock. 8. Remedial methods such as the observational learning and utilization of audio-visual materials, field trips and visitation of the science facilities will be necessary for students to correct misconceptions.

ICT 활용 수업이 학업성취도와 과학 탐구능력 및 정의적 특성에 미치는 효과

한영욱,장임정 부산교육대학교 과학교육연구소 2004 科學敎育硏究 Vol.29 No.-

The purpose of this study is to investigate how ICT method class of earth science units affects the science achievement, inquiry ability and scientific attitude of 6th grade elementary school students. For this study, two classes, a total of 80 elementary school students in the 6th grade at Busan are selected. The ICT method class was applied to the experimental group and the traditional method class was applied to comparative group. The results of this study are as follows: First, statistics figures of this study after classes show that the experimental group with ICT method is significantly higher than the comparative group in the science knowledge achievement. Second, there is meaningful differences between the experimental group and the comparative group in die science inquiry ability. Third, in the science attitudes, the students with ICT method class show much higher statistics than the students with traditional method class. So far we have found that class with ICT method is much more effective than the students with traditional method class in the science knowledge achievement, inquiry ability and attitudes.

Anti-obesity Effects of Purple Kohlrabi on Pig Preadipocytes and 3T3-L1 Cells

Jeong-Wook Im,Jae-Joon Lee 한국식품영양과학회 2014 한국식품영양과학회 학술대회발표집 Vol.2014 No.10

Assessment of Growth Characteristics and Cell Wall Components in Mutant Cultivars of Kenaf (Hibiscus cannabinus)

Sang Wook Jeong,Jaihyunk Ryu,Seung Bin Im,Soon-Jae Kwon,Joon-Woo Ahn,Jin-Baek Kim,Sang Hoon Kim,Hee-Bong Lee,Si-Yong Kang 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07

This study was carried out to determine the amount of lignin, cellulose, and hemicellulose in six kenaf cultivars during different harvesting stages. Three mutant cultivars (Jangdae, Jeokbong and Baekma), two original cultivars (Jinju, C14), and one Chinese cultivar (Auxu) were planted on May 14, 2013. Four harvesting times were made at intervals of 20 days from 15 July to 16 September, 2013. The overall growth characters of mutant cultivar ‘Jeokbong’ such as plant height, stem diameter, flowering time, and dry mass were similar with those of the original variety. The mutant cultivar ‘Baekma’ occurred 10-day late flowering in comparison with the original variety and also displayed higher dry mass than the original variety. Jinju, Auxu and Jangdae, mid-late maturing kenaf cultivars, had high dry weight compared to early maturing cultivars such as Jeokbong, Baekma and C14. In all cultivars, the lignin contents were increased by a late harvest. The Mid-late maturing kenaf cultivars showed high lignin content in comparison with those of the early maturity cultivars. There were no significant differences of cellulose, and hemicellulose content between the cultivars, however cellulose content in stems of these kenaf cultivars were significantly decreased by a late harvest. These results may provide valuable information to assist the parental selection of kenaf breeding.

Treadmill exercise improves spatial learning ability by enhancing brain-derived neurotrophic factor expression in the attention-deficit/hyperactivity disorder rats

Hye Im Jeong,Eun-Sang Ji,Su-Hyun Kim,Tae-Wook Kim,Sang-Bin Baek,Seung Wook Choi 한국운동재활학회 2014 JER Vol.10 No.3

개에서 심기능과 산소균형에 미치는 Dobutamine 과 Epinephrine 의 영향

최정일,유경연,임웅모,정성욱,정성태 대한마취과학회 2001 Korean Journal of Anesthesiology Vol.41 No.2

Effects of Dobutamine and Epinephrine on Myocardial Function and Oxygen Balance in Normal and Stunned Myocardium in Dogs Seongwook Jeong, M.D., Jeong Il Choi, M.D., Sung Tae Jeong, M.D. Kyung Yeon Yoo, M.D., and Woong Mo Im, M.D. Department of Anesthesiology, Chonnam University Hospital, Gwangju, Korea Background: Myocardial ischemia is known to depress systolic and diastolic functions for a prolonged period of time. Dobutamine and epinephrine are frequently administered to improve myocardial function during cardiac surgery. The vascular response to vasopressors might be altered by ischemia and reperfusion, since alterations in vascular control mechanisms have been demonstrated even after a short period of ischemia. The present study was aimed to investigate the effects of dobutamine and epinephrine of regional and global myocardial functions, coronary blood flow (CBF) and myocardial oxygen consumption (MVO_2) in normal and stunned myocardium in an open-chest canine model. Methods: Forty-eight dogs were acutelly instrumented under enflurane anesthesia to measure aortic and left ventricular pressures, and pulmonary (cardiac output) and left anterior descending (LAD) blood flows via a Doppler flowmeter, and a subendocardial segment length in the region supplied by the LAD. In series 1, increamental doses of dobutamine (1,2,5,10 ㎍/kg/min, n = 9 ) or epinephrine (0.02, 0.04, 0.1, 0.2 ㎍/kg/min, n = 10) were infused intravenously (IV) for 10 min before (normal) and after 15 min of LAD occlusion and subsequent 1 hr-reperfusion (stunned). In series 2, incremental doses of dobutamine (50, 125, 250, 375 ng/mL of LAD flow, n =14) or epinephrine (4. 10. 20. 30 ng/mL of LAD flow, n = 15) were infused directly into the LAD (IC) for 3-5 min before (normal) and after myocardial ischemia (stunned). Segment shortening (%SS), as an index of regional diastolic function, were evaluated. Simultaneous arterial and coronary venous contents of oxygen and lactate were measured to calculate MVO_2 and oxygen (EO_2) and lactate extraction (E??) ratios during IV or IC infusions of epinephrine or dobutamine. Effectiveness of metabolic vasodilation was determined from EO_2. Results: IV or IC infusions of dobutamine or epinephrine before ischemia resulted in dose-dependent increases in mechanical functions (%SS and dL/dt max) and MVO_2. These changes were accompanied by parallel increases in CBF resulting in unaltered EO_2. After the ischemia and reper-fusion, %SS and dL/dt max were depressed and E?? was reduced, but similar mechanical responses (%SS and dL/dt max) to both dobutamine & epinephrine were observed. Also, in the stunned myocardium, CBF increased in parallel with mechanical function and MVO_2 with either IC or IV dobutamine, resulting in an unaltered EO_2. However, IC but not IV epinephrine did not affect EO_2, suggesting abolishment of its direct vasodilating effect in stunned myocardium. IN addition, IC epinephrine infusion further decreased E??, while IC dobutamine did not affect it in stunned myocardium. During IV infusions, dobutamine caused a dose-dependent increase in the heart rate but epinephrine did not affect it, despite the comparable increase in cardiac index and mean aortic pressure. Conclusions: The results indicate that dobutamine and epinephrine exert similar positive inotropic and lusitropic effects in normal and stunned myocardium in dogs. However, epinephrine causes direct coronary vasodilation in normal myocardium, but it does not directly affect coronary vascular tone in stunned myocardium. IN addition, epinephrine infusion dose-dependently depresses E?? in stunned myo-cardium. IN contrast, dobutamine affects neither direct coronary vascular tone nor E?? regardless of ische-mia and reperfusion injury. (Korean J Anesthesiol 2001; 41: 207~221)

TE-TRAP : New Marker System for Gamma Irradiated Sorghum (Sorghum bicolor L.)

Seung Bin Im,Jaihyunk Ryu,Sang-Wook Jeong,Soon-Jae Kwon,Joon-Woo Ahn,Dong Sub Kim,Hee-bong Lee,Si-Yong Kang 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07

The transposable element is a DNA sequence that can be changed its position within the genome, sometimes it can create or reverse mutations and altering the cell's genome size. Target region amplification polymorphism (TRAP) is a rapid and efficient PCR-based marker technique, which uses bioinformatics tools and expressed sequence tag (EST) database information to generate polymorphic markers around targeted candidate gene sequences. TE-TRAP is a new marker system which used terminal inverted repeat (TIR) instead of targeted candidate gene sequences. Sorghum holds a good potential plant organism for transposon tagging due to its small genome size, low amount of repetitive DNA and co-linearity with other cereal genomes, which allows the use of information derived from sorghum in other cereal grasses. IS2868 of sorghum accession was treated Gamma irradiation on seed. To define availability and utilization of TE-TRAP, twenty-one accessions were used to evaluate the genetic diversity and underlying relationships. One-thousand thirty-three TE-TRAP markers were amplified by thirty-one primer combination. Altogether, 712 (62.8%) markers were observed polymorphic segregation, whereas 421 (37.2%) showed monomorphic patterns. To estimate genetic differentiation of population by various gamma radiation doses, the analysis of molecular variance (AMOVA) was performed using 4 to 5 different radiation doses population of M1 sorghum individuals. This study and marker system will provide valuable information to assist radiation mutation breeding.

사람면역결핍바이러스 양성 환자에서 병발한 강직성척추염

김태욱 ( Tae Wook Kim ),박미란 ( Mi Ran Park ),이충원 ( Choong Won Lee ),정민정 ( Min Jeong Jeong ),임준영 ( Jun Young Im ),정재식 ( Jae Shik Jeong ) 대한류마티스학회 2010 대한류마티스학회지 Vol.17 No.4

Human immunodeficiency virus infection is associated with a variety of rheumatic manifestations. The pathogenic mechanisms are not well defined, but evidences suggests multiple mechanisms, including direct or indirect human immunodeficiency virus involvement with a genetic, immunological, and environmental basis. Rheumatic manifestations can occur during the course of human immunodeficiency virus infection, and their presence is associated with an overall poor prognosis for the underlying human immunodeficiency virus infection. We report a case of a 37-year-old male who had ankylosing spondylitis with a human immunodeficiency virus infection.

막증식성 사구체신염으로 발현된 현미경적 다발혈관염

정민정 ( Min Jeong Jeong ),김태욱 ( Tae Wook Kim ),임준영 ( Jun Young Im ),정재식 ( Jae Sick Jeong ),박미란 ( Mi Ran Park ),김태우 ( Tae Woo Kim ),이충원 ( Choong Won Lee ) 대한류마티스학회 2010 대한류마티스학회지 Vol.17 No.3

Microscopic polyangiitis (MPA) is characterized by pauci-immune necrotizing small vessel vasculitis without clinical or pathological evidence of necrotizing granulomatous inflammation. The kidney is the most often affected organ in the majority of patients with MPA, and renal manifestations are usually the first symptoms. Glomerular capillaries are affected most often, resulting in necrotizing glomerulonephritis, usually in a crescent formation, with no or few immune deposits able to be demonstrated at the sites of vasculitis and glomerulonephritis. We report a case of microscopic polyangiitis in both legs with pitting edema in a 50-year-old female. Laboratory findings showed hematuria, proteinuria, and a positive peripheral antineutrophil cytoplasmic antibody. A renal biopsy revealed pauci-immune splitting and necrotizing capillary loop walls necrotizing vasculitis and membranoproliferative glomerulonephritis (MPGN). With a diagnosis of MPA, she has been managed with high dose steroid and cyclophosphamide. To our knowledge, this is the first reported case of MPA with MPGN.

증례 : 순환기 ; 국한된 ST 분절 상승을 보인 심근경색으로 오인된 급성 심근심막염 1예

김태욱 ( Tae Wook Kim ),정민정 ( Min Jeong Jeong ),임준영 ( Jun Young Im ),정재식 ( Jae Shik Jeong ),박미란 ( Mi Ran Park ),박주철 ( Ju Cheol Park ),정준호 ( Joon Hoon Jeong ) 대한내과학회 2011 대한내과학회지 Vol.80 No.1

본 증례의 환자는 급성 상기도 감염의 증상 이후 발생한 흉부 불편감을 주소로 내원하였고, 국한된 ST 분절의 상승과 심근 효소의 상승으로 급성 심근경색증이 의심되었으나, 심장 초음파 및 관상동맥 조영술을 시행한 이후 급성 심근심막염으로 진단할 수 있었고, 이를 대증적 치료로 완치하였다. 이에 본 저자들은 급성 심근경색증의 소견을 보인 급성 심근심막염 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Although, with regard to diagnosis, history, physical examination, laboratory data, and electrocardiogram (ECG) are helpful, it can be difficult to distinguish between pericarditis, myopericarditis, and myocardial infarction. Typically, the ECG pattern evolves similarly in acute pericarditis and myopericarditis and includes diffuse ST elevation and PR depression, and then diffuse T wave inversion. Nevertheless, atypical ECG features are seen occasionally in both, especially in myopericarditis. They are characterized by localized ST elevation (inferolateral or anterolateral) and T wave inversion before ST segment normalization. This makes it difficult to distinguish acute myopericarditis from acute myocardial infarction. We report the case of a 27-year-old man with acute myopericarditis with localized ST elevation mimicking acute myocardial infarction. (Korean J Med 2011;80:92-96)