찰벼 신소재 개발

고희종 서울대학교 농업개발연구소 2001 농업생명과학연구 Vol.5 No.-

Waxy rice lines of diversified qualities were developed by chemical mutagenesis and by introgressing the mutated genes for grain quality into waxy varieties. The low-amylose endosperm trait of a mutant line du-6 was expressed in case of homozygotic pairing of two independent recessive genes. The gene of low amylose endosperm of Du-7 showed a lethal effect on pollens and was transmitted into the progeny through only female parent. The flo(flourOy), su(sugary), and shr(shrunken) genes were transmitted to the F2 progenies independently with wx(waxy) gene. However, it was revealed that wx(waxy) gene was epistatic over du-1(dull) gene. Low-amylose mutant lines induced from the normal line had very low amylose content, 7.0∼10.4%. Sugary lines and giant embryo lines showed more lysine content. Giant embryo waxy lines revealed much more lipid content than the parent variety. Floury waxy and sugary waxy lines showed increased protein content, 9.0∼10.3%. Some waxy lines developed showed greater Ca^2+, Fe^2- and riboflavin content. Lines developed will be applicable for practical use as highly nutritive rices.

일부 조선업 근로자의 직업성 요통 발생실태 및 위험요인에 관한 연구

고상백,김형식,최홍렬,김지희,송인혁,박준한,박종구,장세진,차봉석 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.1

목적 : 이 연구에서는 한 사업장의 동일한 코호트내에서 직업성 요통의 발생 및 발생원인에 대해 조사하고자 하였다. 방법 : 연구대상은 1995년 12월 현재 한 조선업체에 종사하는 근로자 중에서 1995년 12월 31일 까지 요통이 이미 발생한 근로자와 1995년 당시 검진 미수검자를 제외한 9,784명을 연구대상으로 하였다. 요통 발생군은 1996년부터 1998년까지 3년간 추적 관찰하여 요통으로 4일 이상 통원 또는 입원치료를 받은 근로자로 하였다. 발생률은 요통발생 당시 연도를 기준으로 하여 해당 연도의 4일 이상 신규치료를 받은 중등도 이상의 요통근로자를 분자로 하였고, 해당년도 사업장의 종사하는 근로자 총수(과거 요통자 제외)를 분모로 간주하였다. 요통 발생군은 외상성 요통과 직업관련성 요통으로 대별하였으며, 위험요인과 질병 발생간의 관련성을 보기 위한 Cox모형에서 그 위험도를 파악하고자 할 때에는 직업성 요통만을 환자군으로 선정하였다. 결과 및 결론 . 요통 발생률은 근로자 천명당 1998년 3.1명, 1997년 8.8명, 1996년 7.8명이었다. 요통점유율의 범위는 10.99∼25.66이었다. 연령별 요통 발생률은 30대, 40대에서 높은 발생률을 보였다. 진단명에 따른 발생률은 추간판 탈출증, 염좌, 척추골절, 척추분리증, 척추협착증 순이었다 직업성 요통 발생자들의 직업적 요인을 알아보기 위하여 요통 발생 당시 작업형태를 알아본 결과, 물건을 들다가 66명(35.3%)이 발생하여 가장 큰 빈도를 차지하였고, 물건을 옮기는 과정에서 19명(10.2%)이 발생하여 2위를 차지하였고, 넘어지거나(8.6%), 물건을 당기는 자세(8.0%), 값자기 일어서다(7.5%) 순으로 요통이 발생하였다. 직업성 요통에 영향을 주는 일반적 특성 및 직업적 특성에 판한 상대위험도 및 95% 신뢰구간를 구한 결과, 요통발생에 영향을 주는 유의한 변수로는 체질량 지수(비만도), 교대여부, 중량물 취급여부였다. Objectives : This study was conducted to estimate the incidence rate, and to identify the risk factors for the occupational low back pain among shipyard workers. Methods : The study subjects consisted of 9,784 workers who were employed in a ship-building industry (excluded workers who had a history of low pack pain before 1995 or did not take periodic health examination in 1995) . The cases were 220 people who experienced back pain from January 1, 1996 to December 31, 1998. To assess risk factors for occupational low back pain, Cox propotional hazard model was used. Results : During the recent three years from 1996 to 1998, the incidence rate per 1,000 persons was 7.8 in 1996, 8.8 in 1997, and 3.1 in 1998. The main causes of work-related low back pawn were sprain, strain and disc herniation. Lifting was the most common cause of back pain (35.3%) , and carrying (10.2%) and pulling (8.0%) were followed. In Cox proportional harzard model, independent risk factors for back pain were body mass index(R.R. ; 1.54, 95% C.1. : 1.06-2.25), shift work(R.R. ; 1.65, 95% C.1. : 1.19-2.28), and lifting heavy material(R. R., 3.95, 95% C.1. : 2.29-6.82). Conclusions . This study suggests that the risk factors of back pawn In shipyard work-ers were body mass index, shift work and lifting.

질소이용효율이 높은 벼품종 육성 연구

고희종 서울대학교 농업개발연구소 1999 농업생명과학연구 Vol.3 No.-

Crop variety having high nutrient-use efficiency is a prerequisite to meet the need of environment-friendly crop cultivation. A few studies on genetics and breeding for physiological nitrogen-use efficiency (PNUE; grain yield /absorbed N) in rice initiated recently with the elucidation of varietal differences, which suggested the possibility of high PNUE varieties. A project for breeding high PNUE rice varieties has been carried out in our laboratory, and the results obtained so far are briefly summarized here. Genotypic variations in PNUE under both N-fertilized (100kg/ha) and unfertilized conditions were significantly high using varieties of various origin and plant architecture, and PNUE was much higher in improved HYV than in land varieties. Path analysis revealed that harvest index was a major character contributing to PNUE. PNUE was lowered by the heavy application of N fertilizer. The variances of general combining ability for yield-related characters were higher than the variances of specific combining ability in both N-fertilized and unfertilized conditions, indicating that additive effects were more important than dominance effects. Dasanbyeo and Guichow out of parents were the best combiners for biomass production, yield, and crop growth rate in F1. Genetic similarities among parents were estimated to be useful in predicting the yield heterosis in F1 under N-fertilized condition. The genetic segregations of dry-matter and PNUE in F2 were continuous. Heritabilities for yield-related characters varied along characters and populations. Heritabilities for yield were increased with generation advance and were much higher in N-unfertilized condition than in N-fertilized condition. Genetic gain after selection for yield was significantly higher in N-unfertilized condition than in N-fertilized condition. However, the selection response for yield was negligible in case that the plants were grown in N-unfertilized condition after selection in N-fertilized condition and vice versa. Selection for PNUE in early generations was effective in both N-fertilized and -unfertilized conditions, implying that high PNUE lines could be bred by selection after hybridization. Promising lines having both high yield and high PNUE were selected in F3 and F4. The selection with generation advance for the lines is in progress for genetic fixation.

벼의 아종간 재조환 극대화를 위한 아종간 특이적인 DNA 마커 탐색

고희종 서울대학교 농업개발연구소 2000 농업생명과학연구 Vol.4 No.-

The subspecies-specific RAPD markers using 30 varieties(15 japonica, 15 indica) of various origin could be detected. Of the 526 random primers tested, 54 subspecies-specific DNA bands were identified. Although RAPDs were less polymorphic than URP(random eicosamer primer) bands, the proportion of subspecies-specific markers by RAPD was higher than those by by URP. 54 subspecies-specific markers consisted of 25 japonica-specific markers and 29 indica-specific markers. Rice varieties were classified into two discrete subspecies by subspecies-specific markers. The SPV(subspecies prototype variety) concept was introduced representing the typical varieties to each subspecies. 10 JPVs(japonica prototype species) and 4 IPVs(indica prototype species) were selected. The breeding lines from cross between Dasanbyeo(indica) and TR22183(japonica) was analyzed by selected subspecies-specific markers. All the lines turned out to be genetically closer to indica parent. Dasanbyeo.

C₄유분을 이용한 옥텐류의 합성에 있어서 1,3-Butadiene의 함량에 따른 이량화 촉매의 수명에 관한 연구

전종기,한원희,조정호,고승태,노상균 동양대학교 2001 동양대학교 논문집 Vol.7 No.1

Selective hydrogenation of 1,3-butadiene in C4 raffinate was carried out in fixed bed reactor using Pd/a1unina catalysts, Concentration of 1,3-butadiene in C4 raffinate could be reduced under 100 ppm.The life of dimerization catalyst using C4 raffinate after selective hydrogenation was longer than that of dimerization catalyst without selective hydrogenation.It was found that dilution of olefin concentration in feed was effective to increase dimerization catalyst life.

액정유체의 압력 유도 흐름에서의 분자 배향과 속도 분포

한원희,조정호,전종기,노상균,고승태 동양대학교 2001 동양대학교 논문집 Vol.7 No.1

본 연구에서는 액정의 압력 유도 흐름에 대해 적응성 토크 균형식과 코시 운동량보존식을 액정 연속체 이론의 핵심이 되는 Leslie-Ericksen 이론에 적용하여 수치해석 방법들로 풀어내었다.비선형 편미분 방정식계의 해를 구할 때 경계조건으로 쓰인 분자 배향닻 조건은 평행 닻조건(parallel anchoring)과 직교 닻조건(homeotropic anchoring)이다.분자 배향 분포는 평행 닻조건에서나 직교 닻조건에서나 시간이 지남에 따라 간단한 전단 흐름에서와 같이 3차원 비평판 배향의 구조를 갖게되지만 배향 비틀림의 구조가 다름을 알 수 있었다.배향 비틀링의 3차원적 구조를 갖게됨에 따라 압력 구배가 걸리는 흐름방향의 주 속도 분포뿐만 아니라 직교되는 방향으로 부 속도분포가 생기며 정상상태로 발전해가는 속도 분포 진화는 점근적이 아닌 진동적이다.비정상상태에서나 정상상태에서 속도 분포는 비 뉴톤성임을 알 수 있다.비등방성 Miesowicz 점도 순열에 따른 평행 닻조건에서의 더 많은 흐름량을 볼수 있고 직교 닻조건에서는 벽면에서 보이는 작은 속도 구배량의 특징을 가진다.

원예치료가 정신 및 지체 장애인의 재활에 미치는 영향

손기철,고언희,엄수진,이상훈,송종은 建國大學校附設農業資源開發硏究所 2002 農資源開發論集 Vol.24 No.-

This study was to investigate the effect of horticulture therapy on the healing and rehabilitation of the mentally retarded (MR) and physical disorder (PD) persons. Horticultural therapy program was carried at S rehabilitation center located in Kyounggi-DO from Jun 29, 1999 to Oct 12, 1999. The participants in this program were 36 clients of MR and PD. They attended 14 times once a week for 1 hour at a time for horticultural therapy. Evaluation of horticultural activities and ADL (Activities of daily living) has been assessed two times, that is, before and after horticultural therapy program (HTP) whereas horticultural therapy group activity treatment procedure and horticulture task skill inventory have been assessed 3 times, that is, before HTP and after each 7 weeks. MR in the evaluation of horticultural activities showed statistically significant in participation, interest and assistance, verbal interaction during activity, self-concept and identity, need-drive adaptation, interpersonal and social relations, cognition and problem solving, exercise perceptivity, life-tasks skill and vocational adjustment. In activities group of MR also showed significant improvement in terms of physical perceptual abilities, cognitive ability, writing ability, social interaction (P<0.001). Additionally, their horticulture task skill were improved significantly in skill and efficiency factor (P<0.008) and their ADL were changed positively but not significant. On the other hand, PD in evaluation of horticultural activities showed significantly positive changes in self-concept and identity, interpersonal and social relations, life-tasks skill and vocational adjustment. However, physical perceptual abilities factor was proven to be effective in horticultural therapy group activities treatment procedure (P<0.002). Only grooming was significantly improved in ADL evaluation of PD (P<0.03). Putting these results together, it was found that horticultural therapy programs would be very useful for rehabilitation and healing method in both MR and PD.

중희귀모델을 이용한 최대수요예측에 관한 연구

이충식,김종달,박재윤,고희석 경남대학교 신소재연구소 1994 論文集 Vol.4 No.-

발전소에서 운용계획을 만들기 위해 단기의 최대부하를 예측해야 한다. 부하예측의 경우에 휴일정보나 온도경향과 같은 요인에 관해서는 불충분하고 비수량적인 정보 만을 얻을 수 있다. 그러므로 시계열모델을 이용한 부하예측이 필요하다. 본 연구에서는 기온-부하모델을 구성하여 주간변동, 계절변동을 제거하고 불규칙변동은 자기회귀모델을 이용하여 제거한다. 예측결과 3개월 평균오차는 여름의 평균오차가 약 3.5%정도 인 것을 제외하고 모든 계절에서 2%보다 적었다. 이것은 예측구간을 세분화 하므로서 예측보차를 줄일 수 있을 것으로 사료된다. To make weekly operational plan for power stations, we have to forecast short-term peak load. In case of load forecasting, we can obtin only insufficient and unnumerical information with respect to load such as holiday information and trend of temperature. Therefore the forecasting using a time series model is necessary. In this paper, construct temperature-load model and remove weekly variation, seasonal variation and unknown factors using autoregressive model. Average forecasting percentage error of 3 months is less than 2% in all season except summer. Average forecasting percentage error of summer is about 3.5%. But this will be decreased by subdividing forecasting-section

'PRO/II with PROVISION' 범용성 화학공정 모사기를 이용한 원유정제공정의 모사에 관한 연구

조정호,전종기,한원희,고승태,노상균 동양대학교 2001 동양대학교 논문집 Vol.7 No.1

Crude refinery unit is the first step in refining crude oil.Crude refinery unit is divided into the following two parts.The first par is atmospheric crude distillation column and crude preheating train.Because of the massive furnace duty to heat crude oil for distillation most units have an elaborate preheat train, in which the crude oil is preheated by back exchange with hot pumparound liquids from the unit.The other part is composed of the vacuum distillation unit.In this study, a step-by-step procedure for simulating an atmospheric crude distillation column by using PRO/II with PROVISION as a general purpose chemical process simulator is introduced.

벼 雜種品種의 開發硏究 現況과 展望

許文會,金弘烈,高熙宗 서울大學校農科大學 農業開發硏究所 1991 서울대농학연구지 Vol.16 No.1

벼에서 雜種强勢 이용 育種法은 中國에서의 성공적인 實用化와 더불어 現在의 收量 水準을 한 段階 올릴 수 있는 획기적인 育種法으로 평가되고 있다. 이에 本 稿에서는 雜種品種 硏究의 進行狀況과 今後의 展望 等을 벼에서의 雜種强勢 정도, 雄性不稔 및 稔性回復 體系, 雜種種子 生産 및 經濟性 等으로 구분하여 考察하였다. 그 結果를 要約하면 다음과 같다. 1. 지금까지 보고된 바로 벼에서의 收量 雜種强勢는 40% 정도를 기대할 수 있을 것으로 보이며, 收量構成要素 中에는 粒數의 增加가 收量 雜種强勢에 가장 크게 寄與하는 것으로 나타났다. 장차 Indica와 Japonica의 hybrid는 雜種强勢 水準을 크게 높일 것으로 보인다. 2. 細胞質 雄性不稔의 種類와 稔性回復因子 等을 검토하였고, 雜種品種 育成 體系를 單純化시킬 수 있는 方案들을 論議하였다. 3. 雜種品種 實用化의 관건이 되는 雜種種子 生産 現況과 自然交雜率 提高方案 等을 고찰하였고, 經濟性은 中國의 例를 검토하였다. Utilization of hybrid vigor in rice has been evaluated as an innovative breeding method to elevate the current yield-level, with the success in China. In this study, Current achievements and future outlook on hybrid rice were reviewed and discussed with the topics of extent of heterosis-level, the system of male sterility and fertility restoration, hybrid seed production, and the economical aspects. The results are summarized as follows; 1. The practical yield advantage over the best commercial cultivars might be 40%, and number of grains out of yield components was mainly responsible for the yield heterosis from the reports. It was expected that hybrids between Indica and Japonica might level up the heterosis extensively. 2. The system and genetics of cytoplasmic male sterility and fertility restoration reported in rice were reviewed. The feasible methods to simplify the system of breeding hybrid rice were estimated. 3. The status of hybrid seed production and the strategy for the improvement of natural outcrossing were summarized, and the economics of hybrid rice in China was discussed.