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중부지역의 콩 주요 품종별 생육특성 및 아이소플라본 함량 비교
윤건식,황세구,홍성택,홍의연,윤홍태,김홍식 한국국제농업개발학회 2016 韓國國際農業開發學會誌 Vol.28 No.4
This study was performed to select the high-yield soybean cultivar suitable for the mid part of Korea and to provide as a basic data for improving productivity of the farmhouse. To this, Daewon as a control and four soybean cultivars such as Uram, Taeseon, Saegeum and Seonpung soybean seeds known that high-yield varieties developed after 2010 were selected. Growth characteristics and functional isoflavone contents of five soybeans were field tested at the field in Goesan, Chungbuk during 2014 and 2015. In comparison with Daewon, maturity date was recorded the earliest at Taesun with 15th Oct. Height of the first pod for the mechanical harvesting have a benefit to Uram (16.8 cm) and Taeseon (14.6 cm), however; shattering percentage of Taeseon were showed the high value of 11.2%. Productivity of Uram, Seonpung and Taesun were increased with 20, 9, and 5 %, respectively, compare to that of Daewon. Total isoflavones contents (μg/g) of five soybeans were ordered as Saegeum (1222.2) > Uram (1111.9) > Seonpung (897.2) > Daewon (885.8) > Taesun (829.5). Total isoflavones contents when soil mulching compare to the non-mulching were increased 206.6 μg/g at Daewon and 460.8 μg/g at Uram soybean.
윤건식,노솔지,전유민,윤철구,김은정,김인재,김태일 한국육종학회 2023 한국육종학회지 Vol.55 No.3
Removing secondary branch to produce commodity watermelons is labor-costing and time-consuming work in traditional watermeloncultivation. Moreover, because elderly farmers work for a long time with their backs bent, musculoskeletal disorders reduce the quality oflife of farmers. To improve this working condition, we developed the watermelon 'Soonless' variety that does not need to be pruned becausethere is no secondary branch. For diploid oval watermelons, the stripe width of the fruit is wide, the color of it's skin is green, and theflesh is pinkish-red. It contains 480 seeds of ‘Soonless’, and the fruit weight is 8.6 kg, which is heavier compared to ‘Sambokggul’. Thethickness of the pericarp is 1.3 cm, and the total soluble solids content is 12.0 °Bx, which is similar to ‘Sambokggul’. The characteristicswhich distinguish it from the control variety include the leaf blade length and width, the ovary size, the width of the fruit stripes, and thethickness of the pericarp. The yield was 6 ,450 kg/10a, an increase of 5.3% compared to ‘Sambokggul’. As a result of this research, ‘Soonless’has been registered as a variety with the Korea Seed and Varieties Service in 2022 as it was filed for breed protection in 2019 (RegistrationNo. 8808).
4 행정 사이클 스파크 점화기관의 시뮬레이션에 관한 연구 (제1보)
윤건식,우석근,서문진,신승한 한국마린엔지니어링학회 2001 한국마린엔지니어링학회지 Vol.25 No.6
The simulation program which predicts the gas behavior in a spark ignition engine has been developed and verified by the comparison with the experimental results foy the MPI engine, naturally aspirated and turbochared engines with a carburettor. First paper describes the calculations of the behavior of gas in the intake and exhaust system. The generalized method of characteristics including friction, heat transfer, area change and entropy gradients was used to analyse the pipe flow The constant-Pressure model was applied for the analysis of the flow through engine valved, and the constant-pressure perfect-mixing model was applied for the flow at manifold junction. The concept of the sudden area change was used for the muffler and catalytic convertor. Fer the plenum chamber in an MPI engine, constant-pressure model and constant-volume model were both examined. Through the comparison of predicted results with experiments, the simulation program was verified by showing good prediction of the behavior of IC engine qualitatively and quantitatively under wide range of operating conditions.
내연기관 흡기 계통의 Plenum Chamber의 유동 해석 모델에 관한 연구
윤건식,윤영환,우석근 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-
In this paper, the simulation models were examined to represent the flow through the plenum chamber in the intake system of MPI spark ignition engine. The constant-pressure perfect-mixing model or branch model which had been devised originally to represent the flow through the manifold branch system was tested. The constant-volume model or tank model also applied and the results were compared with those of the branch model. The prediction accuracies showed no remarkable differences between two models. Therefore, both models would be applicable successfully to represent the flows at the plenum chamber.
윤건식,노솔지,전유민,윤철구,박성원,김은정,김주형,김태일 한국육종학회 2023 한국육종학회지 Vol.55 No.4
As the rural farming population decreases and ages, there is a gradual decrease in watermelon cultivation. Although the productionof small- and medium-sized watermelons is increasing, typical large-sized watermelons are still, which culminates in their cultivation beinga burdensome task for elderly farmers. To address this issue, we developed a watermelon variety, namely, ‘Soonzero,’ that does not requirepruning, as its secondary lateral branches do not occur in primary lateral branches after the growing point it cut. ‘Soonzero’ is a diploidand broad, elliptical watermelon; its uniqueness lies in its green skin and pinkish-red flesh. The conspicuousness of veining on the skin isweak, and the width of the fruit's stripes is similar to that of ‘Sambokggul.’ In terms of variable characteristics, in this study, this varietyproduced 452 seeds, a yield similar to that of ‘Sambokggul,’ with the length and width of the resultant fruit being 25.5 and 24.2 cm, respectively. Additionally, the pericarp of ‘Soonzero’ had a thickness of 1.0 cm and a total soluble solid content of 11.8 °Bx. The yield of ‘Soonzero’was found to be 6,150 kg per 10 acres, similar to that of ‘Sambokggul.’ However, ‘Soonzero’ differs from the control in terms of the followingtraits: fruit stripe width, flower spot shape, and the conspicuousness of veining on the fruit. In conclusion, the secondary lateral branchlessvarieties developed at the Watermelon Research Institute are expected to be quickly distributed to farmers with excellent quality by makingup for their shortcomings by transferring technology to breeding companies and giving consumers the opportunity to choose according totheir purchasing preferences. Above all, since it can reduce the labor required to remove lateral branches, it will help farmers grow watermelonsmore easily by solving aging and labor issues, which are chronic problems in rural areas (Grant number 8807).
충북지역 토마토 시설재배지의 풋마름병균(Ralstonia solanacearum) 오염도 및 분리균주의 특성
윤건식,차재순,박상용,강효중,이기열 한국식물병리학회 2004 식물병연구 Vol.10 No.1
Contamination level and characteristics of Ralstonia solanacearum in soil of greenhouses cultivating tomato plants in Chungbuk province was determined. R. solanacearum was isolated with the semiselective media in 27 greenhouse soil samples out of 133 greenhouses soil investigated, which indicates 20.3% of tomato cultivating greenhouses in Chungbuk contaminated with the bacterial wilt pathogen. Density of R. solanacearum was estimated to 102~4 cfu/g in the contaminated soil. All 71 isolates of R. solanacearum which containing 12 isolates from the diseased tomato plants were race 1, and 35 isolates of them were biovar 3 and 36 isolates were biovar 4. More than 88% of 71 isolates were inhibited growth on nutrient agar containing oxolinic acid 0.5 mg/ ml, streptomycin 25 mg/ml, tetracycline 5 mg/ml and cupric sulfate 375 mg/ml (1.5 mM). The 11.3%, 4.2% and 5.6% of the isolates can grow on nutrient agar containing 10 times more oxolinic acid, streptomycin, tetracycline than minimal inhibitory concentration of the sensitive strains. Five isolates were resistant to 2 bactericides and one isolates was resistant to all 3 bactericides.