A Basic Study on Leaf and Stem Production of Angelica acutiloba

Choi,Seong-Kyu,Yun,Kyeong-won,Chon,Sang-Uk,Lee,Jong-Ill,Seo,Young-Nam,Seo,Kyoung-Sun,Choi,Kyeong-Ju 한국자원식물학회 2004 Plant Resources Vol.7 No.3

This study was conducted to develop effective production system in greenhouse for leaves and stems of Angelica acutiloba by using connect pots in 2003 and 2004. Seed germination rate and plant biomass of Angelica acutiloba collected in 2004 were higher than those harvested in 2003. Germination rate of Angelica acutiloba seeds collected in 2003 was 10%, while germination rate of seeds collected in 2004 was above 90%. Especially, plant growth and yield of Angelica acutiloba grown in connect pots sized with 4×4×5cm(length×width×height) were the highest. These results indicate that leaf and stem production of Angelica acutiloba can be improved by using connect pots and optimizing seed collecting time in greenhouse.

Effect of Activated Charcoal on Growth of Zingiber mioga ROSC

Choi,Seong-Kyu,Yun,Kyeong-Won,Chon,Sang-Uk,Seo,Young-Nam,Seo,Kyoung-Sun,Kwon,Byung-Sun 한국자원식물학회 2004 Plant Resources Vol.7 No.2

Activate charcoal (AC) can be utilized as a soil conditioner in agricultural crop areas. This study was conducted to investigate the effect of AC on growth and yield of Zingiber mioga ROSC as affected by different amounts of AC. The results obtained are summarized as follows. Growth characteristics including plant height and leaf length were the highest when activated charcoal added with 10-30%, suggesting that optimum amount of activated charcoal was ranged from 10 to 30%. Growth and enlargement of the root were improved by 10% AC with higher rhizome length and weight.

붕어의 발육 및 생식에 미치는 비소의 영향

남성숙,이철우,류지성,박응로,남규찬,류홍일,전성환,나진균,최덕일,박광식 한국환경독성학회 2001 환경독성보건학회지 Vol.16 No.2

To evaluate the arsenic effect of fish endocrine disruption, crucian carp (Carassius auratus) were treated with 0.5 mg/L and 3.0mg/L of As₂O₃ for 14 days and gonadal development was examined by histological analysis. In ovaries from female crucian carps exposed to 3.0mg/L, immature follicles and atretic follicles were appeared while various normal developmental stages of oocytes were shown in control group. Body weight and Gonadosomatic Index (GSI) of treated carp were also decreased compared to control group. However, no other significant histological changes in liver or kidney were shown in this exposure scheme, This means that reproductive organs are more sensitive than other organs and arsenic may exert endocrine disrupting effect through inhibiting the development of reproductive organ in fish.

1980~1990년대 기능인력 부족 및 양성정책의 성격

최규남,노태천 충남대학교 공업교육연구소 1999 論文集 Vol.22 No.1

The major purpose of this study is to investigate the characteristic of skilled worker deficiency and training policy from a manpower supply point of view. To achieve the purpose of study wrote out research problems as follows: First in which section did deficiency situations of skilled worker bring about before and after 1990 ? And what was the basic cause of them? Second, did an avoidance tendency of skilled occupation that was generated mainly at manufacturing industry bring about by any factors before and after 1990 ? How was the characteristic of it? Third, were what relations between the governmental training policy of skilled worker and the characteristic of skilled worker deficiency? The major conclusions of this study were as follows : 1) The basic cause of deficiency situation of skilled worker came from pool diminution of 15 year old men - 24 year old men. The deficiency of skilled worker was largely generated at a labor intensive industry of low wages and at a smaller business rather than a large enterprise. And in skill levels high-skilled worker lacked so much. These large deficiency of high-skill worker couldn't be solved as just a huge quantity training of a low-skilled worker : the policy that enlarge school such as an industrial high school, a training center etc. 2) An avoidance tendency of skill occupation was mostly generated by a wage disparity, an uncleanness of working environment, an anxiety of the future in their job etc. In the most of them, the wage disparity was the most significant factor. Also an social avoidance tendency of 3D job was one of the main factors. 3) The governmental policy to solve the deficiency situation of skilled worker was the way that enlarge low-skilled worker : increase student of industrial high school and training center. But these policy was the type that followed 1970s's method, moreover was the plan that overlooked 1990s's social·economical variation that a structure of industry and a need of labor supplier was variously changing. Accordingly, the governmental policy couldn't be actualized as the original supply plan until now. In conclusion, to accomplish the object of training policy and to solve the situations of skilled worker deficiency, the training method of skilled worker should be change into qualitative education which can reflect on student's need and today's uniformly quantitative education should be reformed in the future.

심폐소생술후 혼수상태의 환자에서 체성감각유발전위의 예후 예측인자로서의 유용도

최세민,오동렬,최승필,박규남,김세경 대한응급의학회 2000 대한응급의학회지 Vol.11 No.4

Background: The improved technique for cardiopulmonary resuscitation(CPR) has resulted in the survival of many patients who experienced cardiac arrest. However, mortality in resuscitated patients is high, and the survival rate without brain damage is very low. Various neurological examination models, neuro-imaging techniques, electrophysiological procedures, and biochemical tests have been studied with respect to the detection of cerebral damage and outcome, but an early, reliable prediction of individual outcomes is still uncertain. Methods: We studied twenty patients who had been in a coma for more than 24 hours after CPR, Somatosensory evoked potentials(SEP) were measured within the first three days after CPR. Results: Of the twenty patients, seven patients(35%) had a good outcome, and thirteen patients(65%) had a bad outcome. Of the eleven patients with loss of the cortical evoked potential's N2O peak, all had a bad outcome. Conclusion: SEPs are of great benefit in prognostic evaluation after CPR.

Rowe Cell 을 利用한 粘土試料 샘플링의 攪亂程道 推定

최명진,김민욱,전남수,김필규 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1

Recently many studies which related to effective sampling method have been progressed and valuable data accumulated in foreign country. But, domestic technique is insufficient to evaluate the degree of disturbance so it is difficult to seek soli parameter. Thus the grasp of the degree of disturbance is effential to increase accuracy of reasonable parametern from laboratory tests. Also, the degree of disturbance of it was determined. Oedometer tests and Rowe cell consolidation rests reappeared in -situ state were conducted. And its result was compared and analyzed to deduces the degree of disturbance. From these tests, It can be inferred that the compression index generally is not affected and swelling index(C )and preconsolidation load (P )are increased because of the disturbance of soil. Also, it can be considered that consolidation curves given by two tests is little affected from desturbance. Conclusively, the results of two tests indicated that void ratio(e) and swilling index is independent of the degree of disturbance and it is reasonable to evaluate the degree of disturbance through it.

Er:YAG 레이저를 이용한 치아삭제 효과

최남기,양규호,박상원,김옥준 大韓小兒齒科學會 2001 大韓小兒齒科學會誌 Vol.28 No.4

Er:YAG 레이저는 파장이 물의 주흡수 정점과 일치하는 2.94㎛의 방출파장을 가지기 때문에, 물분사를 하면서 사용했을 때, 다른 레이저보다 열손상은 더 작으면서 치아경조직을 보다 효과적으로 삭제한다고 알려져 있다. Er:YAG 레이저의 상아질 삭제 효과를 평가하고자 발거된 소구치와 대구치를 대상으로 상아질 시편을 제작하고 2.94㎛의 pulsed Er:YAG 레이저 (SDL-300EN, 삼성전자, 한국)를 handpiece형의 전달계를 이용한 비접촉식 방법으로, 물에 담궈진 시간과 레이저 조사시간에 따른 삭제량과 형태를 조사, 분석하여 다음과 같은 결과를 얻었다. 1. 건전 상아질에 대한 조사 결과 물에 담군 시간이 증가할수록 삭제율이 증가 하였다. 2. 건전 상아질과 우식 상아질에 150mJ, 10Hz의 조건으로, 30초간 레이저를 조사했을 때, 우식상아질에 비해 건전 상아질에서 surface irregularity가 증가하고 상아세관이 열리는 경향이 있었으며 crack이 관찰되었다. 또한 우식 상아질에 비해 많은 탄조각(ash flecks), crack이 관찰되었고 상아세관의 불연속성(inconsistency)이 관찰 되었다. 3. 우식 상아질에서 30초로 조사한 경우에서는 dark zone이 와동에 국한되어 나타났으며 작은 fleck들이 관찰되었고, 1분간 조사한 경우에서는 30초의 경우보다도 와동이 더 넓었으며, crack이 상아세관 주행방향과 직각으로 형성된 것을 관찰 할 수 있었다. 2분간 조사한 경우는 와동이 가장 넓었으며 crack이 더 많이 형성된 것을 볼 수 있었다. The purpose of this study was to evaluate the effects of Er:YAG laser on cutting efficacy and its histologic findings. Dentin specimens of human premolars and molars were used and irradiated by Er:YAG laser with noncontact handpiece type delivery system under different treatment condition of irradiation tiem. Cavity pattern and volume were evaluated to determine the cutting efficacy and following results were obtained. 1. Cutting volume of sound dentin was getting larger with time immersed in water increase 2. With the condition of irradiation (150mJ, 10Hz, 30sec), surface irregularity was more increased in sound dentin comparing to carious dentin. For the light microscopic examination, dentinal tubules were opened and ash flecks and cracks were noted with inconsistence of dentinal tubules. 3. In case of 30 sec, irradiation in carious dentin, dark zone was limited to small focus whereas 1 min, irradiation, more wider, and cracks were noted in the perpendicular to direction of dentinal tubules. For the 2 min, irradiation, cavity was the widest and more cracks were found.

Study on Leaf Production of Angelica acutiloba by Mulching with Polyethylene Film

Choi,Seong-Kyu,Yun,Kyeong-Won,Chon,Sang-Uk,Seo,Young-Nam,Seo,Kyoung-sun,Kwon,Byung-Sun 한국자원식물학회 2003 Plant Resources Vol.6 No.3

This study was conducted to produce effectively more leaves of Angelica acutiloba through year-round production system by using various mulching materials and polyethylene(PE) tunnel. Soil temperature by covering treatment was higher in PE mulching and PE tunnel than in rice straw mulching, especially showing the highest temperature in PE tunnel from April through May. Water content of soil was higher in PE mulching than in non-mulching. Leaf production of Angelica acutiloba through year-round production showed the highest in PE tunnel and root production in PE mulching. These results suggest that leaf production of Angelica acutiloba can be maximized through PE tunnel cultivation system.

발육중인 영구치의 파노라마 방사선 사진 계측을 이용한 연령 추정

최은영,양규호,최남기,김선미 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.2

본 연구는 혼합치열기 아동에 있어서 연령을 추정하는데 치아의 발육을 이용하면서 치아발육의 평가에 객관적인 수치를 이용하여 방정식을 도출함으로써 간단하게 연령을 추정할 수 있는 방법을 연구하고자 하였다. 이를 위해 2002년에서 2004년까지 전남대학교 병원에 내원한 환아 중 7~9세 어린이 120명을 대상으로 얻어진 파노라마 방사선사진을 이용하여 Mornstad에 의해 제시된 발육치아의 치관 길이, 치근 길이, 치근단공 너비를 측정하여 다음과 같은 결과를 얻었다. 1. 연령과 상관성이 높은 계측치로 남아에서는 제 2대구치 치관 길이, 제 1대구치 치근 길이, 제 1소구치 치근단공 너비가 높은 상관성을 보인 반면 여아에서는 제 2소구치 치관 길이, 제 2대구치 치근 길이, 제 1대구치 치근단공 너비가 높은 상관성을 보였다. 2. 상관성이 높은 계측치를 중다선형회귀분석을 사용하여 역령과 연관시켜 연령추정 방정식을 산출하였다. 남아(개월) = 43.958 + 하악 제 2대구치 치관 길이× 4.392 + 하악 제 1대구치 치근 길이× 2.255 - 하악 제 1소구치 치근단공 너비× 2.046 여아(개월) = 75.213 + 하악 제 2소구치 치관 길이× 3.910 + 하악 제 2대구치 치근 길이× 2.280 - 하악 제 1대구치 치근단공 너비× 6.217 위 식을 토대로 측정에 사용되지 않은 남녀 각각 10명의 파노라마 방사선사진을 이용하여 나이를 추정한 결과 남아에서는 -2.1± 6.8개월의 편차를, 여아에서는 6.1± 6.2개월의 편차를 보였다. 이처럼 연령을 모르는 우리나라의 혼합치열기 아동에서 파노라마 방사선 사진을 이용하여 연령 추정 시 위의 방정식을 사용한다면 비교적 정확하게 연령을 추정할 수 있으리라고 사료된다. The aim of this study was to test whether metric measurements of crown length, root length and apex width during tooth development could be a better basis for correlation with age than the classical methods based on subjective estimations of various stages of tooth development. Panoramic radiographs of 120 children, aged 7 to 9 years, were collected from the department of the pediatric dentistry of Chonnam National University Hospital, Korea. The methods of Mornstad was used to estimate age. The structures measured were crown length, root length and apex width in panoramic radiographic. The results were as follows : 1. In the boys, it showed higher correlation between lower 2nd molar crown length, lower 1st molar root length or lower 1st permolar apical width and age. In the girls, it showed higher correlation between lower 2nd premolar crown length, lower 2nd molar root length or lower 1st molar apical width and age. 2. With the aid of a multiple regression model, a linear relationship between some of these distances and age was shown. Boy(months) = 43.958 + lower 2nd molar crown length× 4.392 + lower 1st molar root length× 2.255 - lower 1st permolar apical width× 2.046 Girl(months) = 75.213 + lower 2nd premolar crown length× 3.910 + lower 2nd molar root length× 2.280 - lower 1st molar apical width× 6.217 Age was estimated in boys and girls using the mathematic model; the mean difference between chronological and estimated ages was -2.1± 6.8 months for boys and 6.1± 6.2 months for girls. Therefore, it seems to be more accurate and easier than the earlier methods.

충전층 반응기에서 전분의 고정화 동시당화발효법에 의한 ETHANOL제조

최동진,원성호,김장규,김남기 成均館大學校 科學技術硏究所 1992 論文集 Vol.43 No.2

Kinetic data of immobilized Saccharomyces cerevisiae, Zymomonas mobilis, and S. cerevisiae-Z. mobilis with amylase from Aspergillus shirousamii(SimultaneousSaccharification-Fermentation of starch) in packed bed reactor were investigated with 10%, 15%, 20%, and 25% water-soluble starch solution at 30 ℃ and initial pH 5.0. For the comparison of ethanol productivity, Z mobilis ATCC 10988, S. cerevisiae ATCC 26603, and dual organisms(Z. mobilis-S. cerevisiae) were immobilized with 3%[W/V] agar-agar gel respectively on the styrofoam bead. The results were that the volumetric ethanol productivity of dual organisms was better than that of Z. mobilis and of S. cerevisiae. And the volumetric ethanol productivity of 25% soluble starch solution was better than that of the others.