참깨의 비닐피복 기계화 일관작업 체계 연구

강철환,이병규,안병옥,박충범,노재환,이성우,이승택,홍종태,이선호,김석현,이상철,김완석,Kang, Chul-Whan,Lee, Byoung-Kyu,Ahn, Byoung-Ok,Park, Choong-Bum,Roh, Jae-Hwan,Lee, Seong-Woo,Lee, Seung-Tack,Hong, Jong-Tae,Lee, Sun-Ho,Kim, Seok-Hyeon 한국작물학회 1997 한국작물학회지 Vol.42 No.5

This study was carried out to develop and investigate integrated mechanization system on polyethylene(P.E.) film mulching culture in sesame. Field trials were carried out to develop optimum mechanics for each step of manual operation in sesame culture and demonstrated those developed mechanics of sesame dibbling vinyl mulcher, sesame binder, sesame thresher and sesame grader at the farmer, s field of Hwasong (Kyunggi-do) in 1994 and 1995. Newly developed sesame dibbling vinyl mulcher brought saving manpower 280 hrs /ha for sowing and P.E. film mulching with it's 98% of labour saving for the harvesting operation of sesame. Sesame Binder showed 93% labour saving for cutting and binding with only 22 hrs /ha compared to 330 hrs /ha that of conventional. Sesame thresher was appeared to have 85% effects of labour saving for threshing with completely dry sesame bundles at one time by 23 hrs /ha compared to 151 hrs /ha that of conventional. Sesame grader was appeared to have 72% effects for sesame grain grading with 12 hrs /ha compared to that of conventional 54 hrs /ha. Grain yield of integrated mechanization culture system showed 6% higher than that of coventional. Integrated mechanization culture system (sesame dibbling vinyl mulcher + sesame binder + sesame thresher + sasame grader) showed 62% of labour saving effects through whole steps of sesame culture by 472 hrs /ha compared to that of conventional 1, 230 hrs /ha.

응급의료센터 성과 평가 기준개발과 적용

강철환,김윤,이평수,권영대,김창엽,신영수,Kang, Chul-Hwan,Kim, Yoon,Lee, Pyung-Soo,Kwon, Young-Dae,Kim, Chang-Yup,Shin, Young-Soo 대한예방의학회 1997 예방의학회지 Vol.30 No.4

Currently, there are 100 community emergency centers which expect to provide professional emergency care like Level 1 trauma centers in U.S.A. To evaluate perforance of emergency centers, most studies have been widely adopted death rate based methods such as Trauma and Injury Severity Score(TRISS) and A Severity Characterization of Trauma(ASCOT). However, these methods are only applicable in situation where registration process of trauma patients is well established. Therefore, an alternative method should be applied to evaluate performance of emergency centers in Korea which does not have well-developed registration scheme. This study aims to develop new performance measures which are applicable to Korea and evaluate performance of 35 community emergency centers through new measures. The new measures are included that 'W-statistic' ; death rate calculated on the basis of International Classification based Injury Severity Score(ICISS), and 'the degree of severity' ; rate of severe trauma patients of each emergency medical centers. The study results can be summarized as follows. First, about 34% of sample emergency centers show they provide proper care in terms of their function. Second, tertiary hospitals, university hospitals, and hospitals located in Seoul show higher severity degree of patients and lower severity-adjusted death rate.

중환자실의 중증도 보정 사망률 변이

강철환 ( Chul Hwan Kang ),김용익 ( Yong Ik Kim ),이은정 ( Eun Jung Lee ),박건희 ( Kun Hee Park ),이진석 ( Jin Seok Lee ),김윤 ( Yoon Kim ) 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.57 No.6

Background: This study aimed to estimate risk adjusted mortality rate in the ICUs (Intensive care units) by APACHE (Acute Physiology And Chronic Health Evaluation) III for revealing the performance variation in ICUs. Methods: This study focused on 1,090 patients in the ICUs of 18 hospitals. For establishing risk adjusted mortality predictive model, logistic regression analysis was performed. APACHE III, surgery experience, admission route, and major disease categories were used as independent variables. The performance of each model was evaluated by c-statistic and goodness-of-fit test of Hosmer-Lemeshow. Using this predictive model, the performance of each ICU was tested as ratio of predictive mortality rate and observed mortality rate. Results: The average observed mortality rate was 24.1%. The model including APACHE III score, admission route, and major disease categories was signified as the fittest one. After risk adjustment, the ratio of predictive mortality rate and observed mortality rate was distributed from 0.49 to 1.55. Conclusions: The variation in risk adjusted mortality among ICUs was wide. The effort to reduce this quality difference is needed. (Korean J Anesthesiol 2009; 57: 698∼703)

군 코호트 구축을 위한 사전 연구

강철환 ( Chul Hwan Kang ),김승육 ( Seung Yuck Kim ) 국군의무사령부 1998 대한군진의학학술지 Vol.29 No.1

현역병 건강보험 이용현황과 이용요인 분석

강철환 ( Chulhwan Kang ),석웅 ( Woong Seok ) 국군의무사령부 2006 대한군진의학학술지 Vol.37 No.1

국군의무사령부 보건통계 개선에 관한 연구

강철환 ( Kang Chul-hwan ),홍영습 ( Young Sup Hong ) 국군의무사령부 2001 대한군진의학학술지 Vol.32 No.1

참깨 品質 改良에 關한 硏究 第4報. 참깨의 登熱에 따른 草型別 油分含量과 脂肪酸 組成의 變化

Chul Whan Kang(姜哲煥),Jung Il Lee(李正日),Eung Ryong Son(孫膺龍) 한국육종학회 1985 한국육종학회지 Vol.17 No.4

The study was conducted to provide basic information to breeders and agronomists working with sesame. The oil content and quality of fatty acid composition were investigated for eight plant types identified and classified by branching habit, capsules per axil, and carpels and loculi of a capsule. Each plant type had two typical cultivars chosen from 527 gene pools. Oil content incresed quickly up from 10th to 25th day after flowering of 25 to 30% and then showed almost maximum to 35th day after flowering. Significant differences between the plant types were not detected in oil content and fatty acid composition, but grains of upper capsules were much lower in oil content than those of middle or lower capsules. Unsaturated, Linoleic fatty acid tended to increase up to physiological maturity with peak on 45th day after flowering and quickly up from 10th to 25th day after flowering of 30% to 35%. Unsaturated, Oleic fatty acid content was about 60% on 10th day after flowering and then reduced slowly. Saturated, Palmitic fatty acid content was about 20% on 10th day after flowering and then reduced quickly upto 25th day after flowering of about 10%, and stearic fatty acid did not show much change in content from beginning of maturity till harvesting. Arachidic, Linolenic and Erucic fatty acids contents were about 5% on 10th day after flowering and then disappeared on 25th day after flowering. Thus this period was considered to be a critical for determining excellent sesame oil quality.

참깨 開花 登熟에 關한 硏究 Ⅹ. 참깨 有限 新草型의 開花 및 착삭習性

Chul Whan Kang(姜哲煥),Jung Il Lee(李定日),Bong Ho Lee(李奉鎬),Nak Sul Seong(成洛戌),Rae Kyeong Park(朴來敬) 한국육종학회 1991 한국육종학회지 Vol.23 No.4

This experiment was performed to investigate the flowering and capsule setting habit of newly developed determinate mutant in sesame (Sesamum indicum L.). Varieties tested could be classified into new plant type by it’s morphological trait of determinance with capsule shape, capsule setting and branching habit compared to reported 9 different plant types in this series. Flowers were appeared progressively toward the tip of the main stem and also toward the tips of branches except the terminal flower flowering at the 2nd day on each main stem and branchs of DBTB terminal (Determinate, Branches, Tricapsules, Bicarpels Quadriloculi) type. Flowers and capsules were beared on secondary branches in DBTB type which is contrasted with unbearing secondary branches in indeterminate type. Flowering order of DBTB type was the earliest on main stem, intermediate on primary branches and the latest on secondary branches, and flowers were appeared progressively from upper part toward lower part in primary branches. DBTB type showed higher inflorescence due to 12 days shorter flowering period compared to that of indeterminate type therefore this will be idealistic character for the purpose of breeding combining harvester adapting varieties in sesame. Capsule bearing ratio was the highest on main stem, intermediate on primary branches and the lowest on secondary branches in DBTB type. Capsule bearing ratio of DBTB type showed decreasing tendancy day by day after first flowering. DBTB type was considered as ideal plant type for labour saving combining harvesting with higher yield ability due to it’s higher inflorescence, flowering and capsule bearing on even secondary branches which do not develop in indeterminate plant types.

참깨 開花ㆍ登熟에 關한 硏究11, 草型 別 發育에 따른 光合成 및 關聯 特性 差異

Chui Whan Kang(姜哲煥),Byung Chan Chung(鄭柄贊),Jung Sik Suh(徐貞植) 한국육종학회 1994 한국육종학회지 Vol.26 No.3

Studies were performed to investigate the difference in photosynthesis and related characteristics according to different plant types;growth stage and leaf position in sesame. Three different plant-type varieties were selected from Korean recommended sesame cultivars and used as materials. Average photosynthesis during whole growing period was 1.64 CO₂ ㎎/d㎡/hr. Few-branched type variety “Kwangsankkae” showed 2.006 CO₂ ㎎/d㎡/hr which was the highest one among three plant types. Upper part leaves at maturing stage showed the highest photosynthesis and the next followed with the order of middle part leaves at maturing stage;and leaves of seedling stage. Average chlorophyll content of single leaf through the whole growing period was 3.31 ㎎ per 100㎠ of leaf area(LA) and was highest in few-branched type variety “Kwangsankkae”. Upper part leaves at maturing stage showed the highest chlorophyll content of 4.39 ㎎/100 LA. Average area of single leaf through the whole growing period was 16.5㎠. Middle part leaves at maturing stage in branched type variety “Hansumkkae” showed the highest chlorophyll content among plant types and growing stages. Average specific leaf weight(SLW) during the growing period was 0.0033. The upper part leaves at maturing stage in branched type variety “Hansumkkae” revealed the heaviest one. Average specific leaf area(SLA) during whole growing period was 275 and was highest in the leaves of non-branohed type variety “Danbaeckkae” at seedling stage. Dry weight ratio;SLW and chlorophyll content were positively associated with photosynthesis;while leaf area;fresh and dry leaf weight were negatively correlated with photosynthesis.

Mutation breeding for determinate, diseases, lodging resistance and high yield in sesame

Chul Whan Kang(姜哲煥),Jung Il Lee(李正日),Rae Kyeong Park(朴來敬),Byung Han Choi(崔炳漢) 한국육종학회 1993 한국육종학회지 Vol.25 No.3

Fourteen sesame varieties have been released to farmer’s field since 1955 in Korea. Two varieties were bred by mutation breeding method out of the varieties, and X-ray 20 Krad-irradiated “Ahnsankkae” was developed in 1984 and has been being major sesame variety in Korea. It is occupied 31% of total sesame area due to higher yield uniformity in different regions and diseases resistance. Suwonkkae” was newly developed in 1991 from a X-ray irradiated mutant crossed to Korean local variety and had superior quality with higher essential amino acids and linoleic(Vitamin F) fatty acid content. Mutant 2,625 pedigree lines and 89,200 mutants of all generations were planted to the experimental field of Crop Experiment Station to screen and investigate diseases resistance, yielding ability and the other usable characteristics from 1989 to 1992 for sesame mutation breeding programme in Korea. 1, 540-mutant lines and 2,137g of M1 seeds were selected among all the released mutant lines and plants of all the generations from 1989 to 1992. Sodium azide(NaN3)-treated dwarf mutant “Suwon 128” had been promising due to it’s unique shape of dwarf with strong lodging resistance and higher yield possibility when planted densely. However, it was deleted from presenting recommending varieties in 1992 by the reason of weakness to phytophthora blight specially at the full maturing stage of harvesting time during the 3 years regional yield trials(RYT) in spite of similar yield performance compared to the recommended varieties. The only one determinate gene in the world “dt 45” irradiated 50 Krad γ-ray by Dr. A. Ashri has been promising gene in Korea for higher maturity rate and synchronization of flowering period to improve longer flowering period(40-50 days) of the indeterminate varieties. “dt 45” was beginning to be introduced to cross breeding programme from 1985, and “Suwon 129” was bred from the cross between “dt 45” and “Danbaeckkae”, and was released to regional yield trial from 1990 for the first time as a determinate type line in Korea. Determinate lines Suwon 131, 133, 134, and 135 were continuously released to regional yield trial following after Suwon 129, but almost all the lines of determinate showed lesser yield performance due to their few capsule setting nodes(3-5) on the stem than recommended indeterminate varieties in spite of their strong resistance to diseases and lodging and higher maturity rate. 5,015 lines(57%) and 1,229(58%) cross combinations of mutants and mutant crosses among 8,751 lines and 2,122 cross combinations of whole cross breeding pedigree nurseries have been planted and evaluated since 1989. 1,266 lines(60%) and 276(54%) cross combinations of mutants and mutant crosses among 2,096 lines and 509 cross combinations of whole yield performance trials(OYT, PYT, AYT and RYT) have been relaeased since 1989 in Korea. Consequently dwarf mutant “Suwon 128” and determinate varieties have been composed of one hundred percent in the crossing block in 1992. Determinate, semi-dwarf, diseases and lodging resistant, larger seed size, few and non branches along with higher maturity rate and yield have been illustrated as Ideal Plant Type of sesame breeding target in Korea. “SI 90033-2B” (Suwon 129//Suwon 9/IS 103) mutant which was found in F₂ pedigree nursery in 1992 showed strong resistance to diseases and lodging, plenty of capsule-setting nodes with longer capsule bearing position, lots of capsules and higher maturity rate compared to those of indeterminate and of other determinate mutants in Korea. It has been evaluated to overcome yield problem of determinates due to idealistic growth and yield components. “SI 90033-2B” has been believed to be the mutant line for creating Ideal Plant Type in sesame.