Selection of Superior Trees for Larger Fruit and High Productivity in Sorbus commixta Hedl.

Kim,Sea-Hyun,Jang,Yong-Seok,Chung,Hun-Gwan,Choi,Myoung-Sub,Kim,Sun-Chang 한국자원식물학회 2003 Plant Resources Vol.6 No.2

The objectives of this study, an analysis of the variation for leaf and fruit characteristics among the selected ten populations of Sorbus commixta Hedl. could be used for the conservation of gene resources and could provide information to superior trees selection. The results obtained from this study can be summarized as follows; Approximately, the Mt. Sungin population at Ulleung island showed larger values in overall characteristics and populations. On the other hand, Mt. Halla population at Jeju island showed the smaller values of the overall characteristics and populations. ANOV A tests showed that there were statistically significant differences in all leaf characteristics among the populations as well as individual trees within populations. But, for fruit characteristics, differences were statistically significant only among the populations. Cluster analysis using single linkage method based on leaf and fruit characteristics showed that ten selected populations of S. commixta in Korea could be clustered into three groups. Group I is Mt. Sungin at Ulleung island, Group II is Mt. Halla at Jeju island, and Group III comprises Osan, Mt. Kaji, Mt. Duckyoo, Mt. Balwang, Mt. Sobaek, Mt. O-dae, Mt. Jiri, and Mt. Taebaek. The selection level based on major agronomic traits, which are the Number of Fruit per Fruiting Lateral(NFL) over 50, and Fruit Length(FL) and Width(FW) over 10 mm, and Weight of 100 Fruit(WFI00) over 66 g, was applied on 100 sample trees, and five trees were selected. The selection effects from selected trees in NFL, FL, FW, and WF100 were evaluated as 132%, 151 %, 142%, and 264% compared to the mean of those 100 sample trees, respectively. Especially, Ulleung 2 showed excellent values that NFL and WFI00 were 95, and 69 g, respectively, suggesting a promising new cultivar for larger fruit and high productivity.

小物 Feeding을 위한 專用 自動化 기기의 開發

장종훈(Jang Jong_hun),김재열(Kim Jae_yeal),홍석주(Hong Suk_ju) 한국생산제조학회 1997 한국공작기계학회 추계학술대회논문집 Vol.1997 No.-

충전탑을 이용한 이산화탄소 제거에 관한 연구

김재홍,김장호,김종수,최동훈 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1

As method in control CO₂ exhaust, CO₂ recovery is used. In this study, it is investigated about CO₂ recovery by absorbtion. We used packing tower(D=50mm, H=1.40m) for experimental apparatus on the chemical absorbtion being used extensively as recovery technique of CO₂. As a result of study on factor influencing absorption efficiency, it is used the absorbent MEA and AMP and it is proved that MEA have higher overall mass transfer coefficient than AMP in same concentration and condition. In the absorption break test, the concentration increase of absorbent in 150 [ℓ/hr] of gas load, 20 [I /hr] of liquid load and 15% of inlet CO₂ concentration was, when MEA was 1.64, 3.27, 4.91 M breakpoint was 120, 210, 345 minute respectively, when inlet CO₂ concentration was 10, 20, 30% breakpoint was 280, 215, 180 minute, when gas flow increase to 100, 150, 200 [ℓ/ hr], breakpoint was 230, 180, 140 minute, at result, the increase of absorbent concentration, inlet CO₂ concentration and gas load give rise to fast breakpoint.

생쥐 위장관의 Interstitial cells of Cajal(ICC)에 대한 면역조직화학적 연구

김영철,차경훈,신무경,임건한,김주영,안병수,김장만,양경철,박도영,오재욱,장인엽 조선대학교 2003 The Medical Journal of Chosun University Vol.28 No.1

Background and Objectives : Interstitial cells of Cajal(ICC) are the pacemakers in gastrointestinal tract that modulates gastrointestinal motiliey and these cells also transmit neural input from enteric nerves to smooth muscles. Recent work on tissues from patients with motility disorders that suggest that loss or defect in ICC could be related to pathophysiology in human and animal models. Immunolabelling of ICC in intestinal wall is recently developed by using specific marker, anti-c-kit antibody. Immunohistochemistry was done for ICC network in attempt to provide a morphological basis for the mechanism regulating gastrointestinal motility Methods : Cryosection was done, and whole-mount preparations of mouse stomach, gastrointestinal tract were immunolabelled using the anti-c-Kit. Immunolabelled ICC networks were observed under a confocal laser scanning microscopy. Results : According to three dimensional reconstruction study, we found that the c-Kit-positive celluar networks were widely distributed in the gastrointestinal muscle (1) circular muscle layer(IC-IM), (2) myenteric plexus(IC-MY), (3) deep muscular plexus(IC-DMP) in ileum, (4) submucosal plexus(IC-SMP) and longitudinal muscle layer(IC-LM) in colon. Conclusion : The characteristic profiles of ICC celluar networks provide a morphological basis upon the mechanism regulating gastrointestinal motility. Additional studies for the enteric nerves-ICC interaction are need to evaluate the detailed roles of Icc in gastrointestinal tract.

Acidic primer를 이용한 교정용 브라켓 접착의 전단결합강도

김진희,진훈희,오장균 대한치과교정학회 2001 대한치과교정학회지 Vol.31 No.1

Acidic primer는 하나의 용액으로 conditioning과 priming을 동시에 시행하는 새로운 접착 시스템으로 치질의 손상이 적고 처리 과정이 간단한 특징을 지닌다. 본 실험은 acidic primer를 이용하여 치면처리를 시행한 후 기존의 접착제로 브라켓을 접착할 때 적절한 결합강도를 지니는지 평가하기 위하여 고안되었다. 50개의 사람 소구치를 5개군으로 나누어 4개군은 acidic primer로 법랑질을 처리한 후 Clearfil Liner bond 2R(1군), Transbond XTR(2군), Panavia 21R(3군), Fuji Ortho LCR(4군)로 브라켓을 접착하였고 1개군은 Transbond XTR를 통상적인 산부식 방법을 이용하여 접착(5군)한 후 전단 결합 강도를 측정하고 접착 파절의 양상을 평가하여 다음과 같은 결론을 얻었다. Acidic primer로 처리한 4개의 군 가운데 광중합형 글래스 아이오노머를 사용한 군(4군)의 전단결합강도(9.72 ± 3.16 MPa)와 Panavia 21R을 사용한 군(3군)의 전단 결합 강도(8.69 ± 2.72 MPa)는 37% 인산으로 처리한 후 광중합형 레진(Transbond XTR)을 사용한 군(5군)의 전단결합강도(10.48 ± 2.60 Mpa)와 유의성있는 차이를 보이지 않았다 (P〉0.05). 2. Acidic primer로 처리한 4개의 군 가운데 광중합형 글래스 아이오노머를 사용한 군(4군)과 Panavia 21R을 사용한 군(3군)의 전단 결합 강도는 Clearfil Liner bond 2R를 사용한 군(1군)의 전단 결합 강도(1.09 ± 0.53Mpa)와 광중합형 레진(Transbond XTR)을 사용한 군(2군)의 전단 결합 강도(2.70 ± 1.46Mpa)에 비해 유의하게 큰 강도를 보였다 (P〈0.05). 3. 접착제 잔류지수 측정 결과 4군(2.1 ± 1.1)과 5군(2.9 ± 0.3)의 경우 1군(0,2 ± 0.4), 2군(0.3 ± 0.9), 3군(0.2 ± 0.4)에 비해 접착제 잔류지수가 유의하게 높았다 (P〈0.05). 4. 4군과 5군의 접착제 잔류 지수간에는 유의한 차이가 없었다 (P〉0.05). 따라서 acidic primer로 치면을 처리하는 방법은 시용되는 접착제에 따라 기존의 산부식 접착법과 유사한 결합강도를 얻을 수 있어 교정용 브라켓 접착시 산부식 단계를 생략할 수 있는 가능성을 보여준다. Acidic primer is the bonding agent which combines the conditioning and priming agent into the single solution and was originally developed for the dentin bonding system. It is less harmful to the tooth structure and more convenient to manipulate than the traditional etching procedure. The purpose of this study is to evaluate the shear bond strength of various bonding materials when the enamel is treated with acidic primer for the bracket bonding procedure. Fifty recently extracted human premolars were randomly separated into five groups : Group I using Clearfil Liner Bond 2 adhesive system to the enamel treated with acidic primer, Group II using Transbond XT adhesive system to the enamel treated with acidic primer, Group III using panavia 21 adhesive system to the enamel treated with acidic primer, Group IV using Fuji-Ortho LC adhesive system to the enamel treated with acidic primer, Group V using Transbond XT adhesive system to the enamel treated with 37% phosphoric acid. The shear bond strength was measured with Instron universal testing machine after storing in 37℃ water bath for 48 hours. After debonding, the teeth and brackets were examined under scanning electron microscope (SEM) and assessed with the adhesive remnant index (ARI). The results were as follows : 1. There were no significant differences in shear bond strength between group III (8.69 ± 2.72 MPa), group IV (9.7 ± 3.16 MPa), and group V (10.48 ± 2.60 Mpa) (p〉0.05). 2. The shear bond strength of group III and group IV was significantly higher than that of group I (1.09 ± 0.53 Mpa), and Group II (2.70 ± 1.46Mpa) (p〈0.05). 3. The ARI of group IV (2.1 ± 1.1) and group V (2.9 ± 0.3) was significantly higher than that of group I (0.2 ± 0.4), group II (0.3 ± 0.9) and group III (0.2 ± 0.4) (p〈0.05). 4. There were no significant difference between the ARI of group IV and group V (p〉0.05). This result suggests that the combination of acidic primer and some bonding adhesive can provide sufficient shear bond strength for clinical orthodontics.

마이크로-매크로 셀룰라 시스템을 위한 계층선정 기법분석

김장섭,이상헌,정우곤,최형진 成均館大學校 科學技術硏究所 1998 論文集 Vol.49 No.1

A control scheme to select the appropriate layer between macro- and microcell hierarchical structure is considered. With the assumption that the each mobile speed is known to the system. the algorithm determines the optimal velocity threshold by which the cell section performed. The optimal criterion is to minimize the Grade of Service(GOS), a service criterion in cellular telephone systems. Mobile station with faster speed relative to the determined optimal speed threshold are assigned to a macrocell, while slower moving terminals are assigned to the smaller cells, i,e.. microcells. For the evaluation purpose for the proposed scheme, two different evaluation perspectives are compared and the algorithm proves to work

객체지향기법으로 구현한 계수규준형 1회 샘플링검사방식

김국철,서장훈,박명규 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

The design of attribute single sampling plans bas been studied for a long time. It is hard to get the sampling plan (n,c) to satisfy the required producer's risk α and consumer's risk β exactly, because the sample size n and the acceptance number c must be integer. In actual practice of using attribute single sampling plans, the producer's or consumer's risk is often different from its specified value. In order to satisfy both the producer's or consumer's risk, the actual risk should be chosen close enough to the required value. The purpose of this paper is to find the sample size n and acceptance number G to satisfy the required proceduer's or consumer's risk. A computerized approach is presented which provides the design procedure for on line sampling plan.

부산 신평·장림공단지역의 대기오염물질 배출 특성

김상헌,정장표,김영태,조성훈 慶星大學校 環境問題硏究所 1995 環境硏報 Vol.5 No.1

Industrial growth and urban gravitation of the population etc. have seriously deteriorated the air quality which has adverse effect on human health and property, and the situation is more serious in industrial complex as well. Therefore, it is necessary to examine the pollutants emissions inventory to establish proper and comprehensive strategies for the reduction of pollutant levels. This study is aimed at investigating the characteristics of the pollutant emissions in the vicinity of Sinpyeung·Jangrim industrial complex in Pusan. The emission quantities of air pollutants were estimated by the grid(1㎞x1㎞), the source classification, and the time on the basis of the type and the amount per month of the fuel. The important results from this study were as followings: The average emission quantity(rate) of SO₂, TSP, NOx, CO and HC showed 1926.74 ton/yr(61.09 g/sec), 367.83 ton/yr(11.66 g/sec), 1440.64 ton/yr(45.68 g/sec), 4698.33 ton/yr(148.98 g/sec) and 447.15 ton/yr(14.18 g/sec), respectively. In case of SO₂and TSP, the emission quantities were majorly contributed by stationary source(point source and area source) whose contribution percentages were calculated as 65.8%, 30.6%. On the other hand, emission quantities of NOx, CO and HC were highly contributed by mobil source(line source) whose contribution percentages were calculated as 59.3%, 84.2% and 88.6%.

과민성 대장 증후군에서의 Pinaverium bromide의 임상효과에 대한 관찰

김영건,장병환,김성철,박헌진 충남대학교 의과대학 지역사회의학연구소 1987 충남의대잡지 Vol.14 No.1

An open clinical therapeutic trial was used to study the therapeutic effect and untoward side effect of pinaverium bromide (Dicetelc^ⓡ) in patients with the irritable bowel syndrome. The drug was given orally 50mg three times a day for two to four weeks to 37 out-patients at Chungnam National University Hospital. The results observed were as followings. 1. Out of the 28 cases with abdominal pain, 22 cases (86%) were markedly improved. And out of 28 cases with abdominal fullness, 20 cases (71%), and out of the 35 cases with changes in bowel habit, 31 cases (89%) were markedly improved. 2. The effect of this drug was as excellent in 18 patients (48.6%) as they were completely relieved from all symptoms. And the effect was as good in 17 patients (45.9%) as patially relieved. So the overall effectiveness was 94.6%'. Only in 2 patients (5.4%), the drug was of no effect. 3. There were no untoward side effects observed. In conclusion, Pinaverium bromide appears to be effective and safe for the treatment of patients with irritable bowel syndrome.

2-Deoxy-D-Glucose에 의한 대사성 쇼크가 무우스의 면역 반응에 미치는 영향

김양숙,장선일,박래길,조성경,정헌택 최신의학사 1991 最新醫學 Vol.34 No.2