산형과 식물에서의 falcarinol(n - heptadeca - 1,9 - dien - 4,6 - diyn - 3 - ol) 의 검색

이규승,손현주,장기철,나효환 한국농화학회 1990 Applied Biological Chemistry (Appl Biol Chem) Vol.33 No.2

The occurrence of falcarinol(n-heptadeca-1, 9-dien-4,6-diyn-3-o1)in the umbelliferous plants such as Ledebouriello seseloides WOLFF., Cnidium officinale MAKINO, Foeniculmn vulgare GAERTNER, Torilis japonica(HOLTT.) DC. Bupleurum falcatum L.,Angelica gigas NAKAI, Oenanthe javanica (BL.) DC. and Daucus carota var. satin DC. was investigated using gas chromatography/mass spectrometry(GC/MS). Falcarinol was found in the root of Ledebouriella seseloides, the stem and the root of Oenanthe javanica, and the root of Daucus carota var. sativa in which its contents were 1,055 ㎍/g, 289 ㎍/g , 179 ㎍/g , and 212 ㎍/g , respectively, while it was not found in the other plants.

소비자 농약에 대한 인식제고 방안

이규승 한국농약과학회 2000 한국농약과학회 학술발표대회 논문집 Vol.- No.-

Testosterone의 投與가 흰쥐의 造精機能에 미치는 影響

李揆丞 충남대학교 농업과학연구소 1975 農業技術硏究報告 Vol.2 No.2

The objective of this study was to examine the effect of testosterone on the spermatogenesis. Testosterone propionate was administered in 20 ㎎ dose to male rat with 10 days interval for 50 days and the treated rat was compared with normal one in their testis weight and histological changes. The results were as follows: 1. The longer treatment gave the more decreased testis weight. Treated rat for more than 20 days was significantly different from the untreated one. 2. Diameter of seminiferous tubule was significantly reduced in 40 and 50 days treatments. 3. The ratio of disrupted spermatogenesis on seminiferous tubles was significantly increased from 20 days treatment. 4. On volumetric proportion of testicular structure, spermatozoa and spermatid were significantly reduced from 20 and 30 days treatments respectively. Other components in testis were not changed. 5. The administration of testosterone in over dose damages spermatozoa and spermatid more than other components in testis.

제지슬러지 가공비료의 시용(施用)이 수묘(樹苗)의 생육에 미치는 영향

이규승,권기원 한국환경농학회 1993 한국환경농학회지 Vol.12 No.3

제지슬러지 비료의 포장 시비에 따른 묘목 생육 효과를 조사하였다. 시비에 쓰인 두가지 슬러지비료 중 하나는 슬러지퇴비이며 다른 한 가지는 슬러지에 몇가지 유, 무기양교를 첨가하여 펠렛 형태로 성형한 것이다. 시비 처리 유형은 총 6가지로 슬러지퇴비, 슬러지퇴비 + 슬러지펠렛비료, 슬러지퇴비 + 슬러지펠렛비료 2회시비, 슬러지펠렛비료, 슬러지펠렛비료 2회시비 및 무시비구로 구분되었다. 연구 대상 수종은 3가지로 관목성 활엽수인 쥐똥나무와 교목성 활엽수인 튜립나무 각각 1-0묘, 침엽수로 스트로브잣나무 2-2묘를 사용하였다. 묘목은 새로 개간하여 양료가 거의 없는 척박한 포지에 수종 별, 처리 별로 1m X 1m 방형구 3반복 씩 식재하였다. 처리 유형에 따른 차이는 있지만 슬러지비료를 시비한 후에 시험 포지의 토양 비옥도와 화학적 성질은 현저하게 개선되었다. 근원경과 묘고는 생육 기간 중 반복적으로 5회까지 측정되었으며 분산분석과 Duncan의 다중검정을 통해 통계학적으로 분석되었다. 쥐똥나무의 근원경과 튜립나무의 근원경 및 묘고는 제2차 측정시까지 처리 평균치 간에 통계학적인 유의차를 보이지 않았다. 그러나 그 이후 5차 측정까지 이들의 생장은 처리 간에 상당한 차이를 보이고 그 차이는 통계학적으로 고도의 유의성을 보였다. 쥐똥나무의 묘고생장에서 그 통계학적인 차이는 더욱 빨리 제2차 측정 시부터 인정되었다. 슬러지퇴비+슬러지펠렛비료(2회) 시비구는 시비 처리 이후 항상 최고 생장치를 보였다. 위에 언급된 두 활엽수종의 근원경 및 묘고 생장 촉진에 슬러지펠렛비료는 슬러지퇴비 보다 효과적이었다. 스트로브잣나무의 근원경과 묘고생장은 슬러지비료 시비에 거의 영향을 받지 않았다. 이는 다른 두 활엽수종과는 다른 스트로브잣나무의 독특한 생장 패턴에 기인하는 것으로 생각된다. Effects of paper mill sludge-fertilizers were investigated on the growth performances of tree seedlings under field conditions. Two types of sludge-fertilizers applied were an organic sludge compost and a processed sludge-pellet fertilizer strengthened with several components of organic and inorganic nutrients. Three species of tree seedlings studied were ibota privet(Ligustrum obtusifolium) and yellow poplar(Liriodendron tulipifera) of 1-0 year seedlings and also eastern white pine(Pinus strobus) of 2-2 year seedlings. Nitrogen and phosphorus contents of plot soil treated with sludge compost + sludge-pellet fertilizer + sludge-pellet fertilizer plot were increased to 8 times and 2.6 times as those of control plot, respectively. The growth performances of root collar diameter and seedling height were repeatedly measured up to five times through the growing season and the results were analyzed statistically by analysis of variance of randomized block design and Duncan's multiple range test. The growth performances of dry weight were measured after last fifth measurements.

청양철망간중석 광산 오염실태 정밀조사

이규승,정덕영,백명진,이충협,이창환 한국토양비료학회 2000 한국토양비료학회 학술발표회 Vol.2000 No.-

動力耕耘機의 牽引 및 牽引補助裝置에 관한 硏究

李揆昇,李鎔國,朴濬傑 成均館大學校 科學技術硏究所 1983 論文集 Vol.34 No.1

The objectives of this study were i) to find the traction aids of power tiller, which can be used more efficiently for grassland, slope land and other soil surfaces on which power tiller have traction problems, and ii) to evaluate the comparative traction performance of two different. types of traction devices of rower tiller; tire and tire with traction aids (track). This experiment was carried out on the four different soil surfaces : hard soil surfaces, plowed land, soil covered with weeds and asphalt road. The results of this experiment were summarized as follows. 1) Power tiller with tires show maximum draft of 200kg at slip range of 40∼50% on four different soil surfaces. Power tiller with traction aids (track type rower tiller) reaches maximum draft of 300kg at about 50% slip on the soil covered with weeds and at 70% slip on the hard soil surface and plowed land. 2) Track type power tiller showed 1.6∼1.8 times as much maximum draft as fewer tiller with tire showed on the all soil surfaces on which experiment were carried out except asphalt road. 3) Track type power tiller showed maximum drawbar horse-power of 1.0∼1.5HP at 28∼35% slip for four different soil surfaces, when the draft was about 300Kg. Power tiller with tire reaches maximum drawl ar horsepower of 0.5∼1.0HP at 20∼25% slip with 200Kg of draft for four different soil surfaces. 4) Track type power tiller showed 1.6 times as much maximum drawbar horsepower as Lower tiller with tire showed. This means that track type rower tiller shows much better tractive efficiency compared with that of power tiller with tire.

砂壤土에 있어서 모델테스트에 의한 車輪의 性能豫測에 관한 硏究

李揆昇,朴濬傑 成均館大學校 科學技術硏究所 1989 論文集 Vol.40 No.1

A series of soil bin experiment was carried out on sandy loam to evaluate the cone index whether it represent the soil physical properties pertinent to soil-wheel system and to investigate if true model theory is applicable to powered rigid, wheel-soil system. Four different sized wheels having diameter of 45, 60, 75 and 90cm were used for the experiment. The following conclusions were derived from the study. (1) True model theory can be sufficiently utilized to study the wheel traction and sinkage on sandy loam. (2) Cone index was found to he good measure of soil physical properties which arc pertinent to predict the performance of the powered rigid wheel-soil system.

市販 弗素系 殺鼠濟의 成分特性

李奎承 충남대학교 농업과학연구소 1982 農業技術硏究報告 Vol.9 No.2

In order to know about chemical properties of a commercial organofluoro rodenticide, Kiratol-F?, this experiment was carried out. Chemicals from different two manufactures were compared with synthetic compound by Gas Chromatograph and NMR-spectrophotometer. The results were as followings; 1. The permitted active ingrdient of Kiratol-F, β-fluoro-ethylacetate, was not identified, but β-fluoroethanol was a new active ingredient.. 2. Kiratol-F was a water soluble liquid containing samll amounts of chloroethanol in impurity. 3. Yield of synthetic fluoroethanol was about 50%, but the composition of the reactant was assumed α-and β-fluoroetanol, and the light condition was better than the dark in yield. 4. It was not become known any breakdown of active ingredient by the different dilutions and time intervals. So, the secondary toxicity of Kiratol-F might be relatively higher than imagination.

유사기구에 의한 경운작업기의 견인저항 예측을 위한 실험적 연구

이규승,조성찬,박원엽 한국농업기계학회 1997 바이오시스템공학 Vol.22 No.2

플라우의 경운저항 예측 관련 국내 논 토양의 물리적특성

이규승,박원엽,권병기 성균관대학교 생명과학자원연구소 1996 生命資源科學硏究 Vol.3 No.2

Two dimensional and three dimensional model for an inclined blade was evaluated to decide the soil physical properties which is necessary for draft prediction of moldboard plow. From the above model, soil cohesion, soil internal friction, soil-metal friction, soil-metal adhesion and bulk density were decided as soil parameters which are needed for computer simulation. Besides above soil parameters, soil moisture content and soil texture were measured for more information at the Iri, Namyang, Yeoju, Pyeongtaek, Asan, Suwon, Chungju, Milyang, Kimhae, Sangju, Kimpo and Kanghwa area from October to November and from March to May, from 1995 to 1996. The most popular soil texture was silty loam and loam The range of soil bulk density was 1500∼1700 kg/㎥. The range of soil cohesion was 10∼15 kPa and that of internal friction angle was 40∼60 degree. The range of soil-metal friction coefficient and adhesion was 0.3∼0.8 and 1.0∼3.0 kPa.