多年生 논雜草 벗풀 塊莖의 萌芽에 關한 硏究

孫錫龍,金鍾煥 충북대학교 농업과학기술연구소 1993 農業科學硏究 Vol.10 No.2

A study was conducted to clarify the effects of environmental factors on the emergence propagu-les in Sagittaria trifolia L. such as temperature, soil moisture, sowing depth, date of tuber collec-tion, storage and cutting conditions, and tuber dryness. The highest emergence percentage was 93% at 30℃ followed by 86% at 25℃ lower or higher temperature decreased the emergence rate. Sagittaria trifolia L. gave the highest emergence per-centage under submerged condition (3cm) . Increased sowing depth resulted in decreased rate of emergence and larger tuber showed higher emergence rate. The tuber of Sagittaria trifolia L. had dormancy until early November and was lower emergence ratio lower than 15% , however the tu-bers sampled later than December appeared to have passed dormancy breaking. Storage in sub-merged soil was observed to better than that in upland condition. The highest percentage of eme-rgence was obtained from tubers with glowing point. Drying tubers for 8-10 days reduced emer-gence ratio remarkably.

동식물체내 질산염 대사와 독성 효과

손용석 高麗大學校 自然資源科學硏究所 1995 自然資源科學硏究 Vol.3 No.-

Brine Shrimp Bioassay를 이용한 해양생물의 세포독성검색

손병화,조용진,이대령,노연숙,이선미,최홍대 동의대학교 기초과학연구소 1994 基礎科學硏究論文集 Vol.4 No.1

As a part of chemical study on the bioactive metabolites from marine organisms, we have investigated cytotoxicity using brine shrimp bioassay for each solvent fractions of the marine algae(12 species), marine sponges(3 species), coelenterates(2 species), echinoderms(4 species), marine molluscs(17 species), and ascidians(2 species), respectively. As the results, chloroform extract of Stichopus japonicus (LC_50 : 274 ㎍/ml), ethyl acetate extract of Anthocidaris crassispina(LC_50 : 121 ㎍/ml), n-butanol extract of Undaria pinnatifida (LC_50 : 178 ㎍/ml), and water extract of Thais clavigera (LC_50 : 61 ㎍/ml), displayed the most significant cytotoxic activity against brine shrimp. Among the marine organisms tested, echinoderms and marine molluscs were thought to be the most active Phylums on screening of new bioactive compounds.

사료지방의 공급과 젖소의 생산성

손용석,최병렬 高麗大學校 自然資源科學硏究所 1998 自然資源科學硏究 Vol.6 No.-

播種期, 苗令 및 土壤水分不足이 黃色種 담배의 生育 및 收量에 미치는 影響

盧載榮,申周植,朴然圭,孫錫龍 충북대학교 엽연초연구소 1984 煙草硏究 Vol.11 No.-

This experiment was conducted to study the influence of environment cultural method and their interaction on the growth and yield components of flue-cured tobacco. Applied variety was NC 2326, and was treated by sowing time(Mar. 11, Mar. 21 and Mar.31), seedling age (40,50 and 60 day) and soil moisture stress period (20 days from 10, 20 and 30 days after setting). The results are summarized as follows. 1.During growing period, stem height, length and width of the largest leaf and total leaves were affected remarkably by the treatments. 2.Soil moisture stress period affected more the characters of tobacco plants than other factors. 3.The tobacco plant treated by early stage soil moisture stress (period from 10 to 30 days after setting) made the early growth very poor, and that tobacco plant showed poor growth until 45 to 50 days after setting. 4.Early sowing, 40 day seedling and early stage soil moisture stress made the plant type sylindrical, and late sowing and 50 to 60 day seedling made the plant type cone shape. 5.Number of total leaves and harvested leaves, leaf area per plant percentage of dry matter of leaf and specific leaf weight decreased by the treatment of soil moisture stress during early and middle part of maximum growth stage. 6.There were little differences of yield among the treatment of different sowing time and seedling age. Early sowing increased the thickness of leaf and weight per unit leaf area, and decreased number of total leaves and specific leaf weight. Number of total and harvested leaves and specific leaf weight of cured leaves were high in the plot of 60-day seedling 40-day seedling showed heavy weight of unit leaf area and low specific leaf weight of cured leaves. 7.From the point of view of interaction between sowing time and seedling age, early sowing (Mar. 11) with 60-day seedling, middle sowing (Mar. 21) with 50-day seedling and late sowing (Mar. 31) with 40-day seedling are recommended. 8.Rapid growth of early growing stage was shown in the plot of adequate soil moisture and late sowing (Mar. 31) with 50-day to 60-day seedling. 9.From the point of standard quality of cured leaves, sowing time can be shifted until late March. And to fix the sowing time, It should be considered that the maximum growth stage and the harvesting time of cutter and leaf would not match with severe drought of May and rainy season of early summer respectively.

삼상 순환유동층의 상승관에서 연속 액상의 축방향 혼합특성

유명선,손성모,강석환,강용,김상돈 한국공업화학회 2004 공업화학 Vol.15 No.1

직경이 0.102 m이고 높이가 3.5 m인 기체-액체-고체 순환 유동층의 상승관에서 액상의 축방향 혼합특성을 고찰하였다. 기체유속(0.01~0.07 ㎧), 액체유속(0.25~0.31 ㎧) 그리고 고체순환속도(2~8 ㎏/㎡s)를 실험변수로 선정하였으며 이들 변수들이 액상의 축방향 분산계수에 미치는 영향을 고찰하였다. 축방향의 추적자 농도분포로부터 분산모델을 사용하여 액상의 축방향 분산계수를 구하였다. 액상의 축방향 분산계수는 기체유속과 고체순환속도가 증가함에 따라서 증가하였으나 액체의 유속의 증가에 따라서는 약간 감소하였다. 또한, 액상의 축방향 분산계수는 등방성 난류 모델을 적용한 무차원군으로 표현되는 상관식으로 나타낼 수 있었다. Characteristics of liquid dispersion in the axial direction were investigated in the riser of a three-phase circulating fluidized bed whose diameter is 0.102 m and 3.5 m in height. Effects of gas (0.01-0.07 m/sl and liquid (0.25-0.31./s) velocities and the circulation rate of solids (2∼8 kg/m^(2)s) on the dispersion coefficient of the continuous liquid phase in the axial direction were determined. A dispersion model was employed to obtain the axial dispersion coefficient of the liquid phase from the radial concentration profiles of tracer with variations of axial position. The axial dispersion coefficient of the liquid phase increased with increasing gas velocity or solid circulation rate, however, decreased slightly with increasing liquid velocity in the riser bed. The axial dispersion coefficient of the liquid phase was well correlated in terms of dimensionless groups based on the isotropic turbulence theory.

대장암 환자에서의 담즙 암태아성 항원(CEA)

김종우,박용태,정철운,권성원,장항석,손석우,안대호,이경포 대한대장항문학회 2000 Annals of Coloproctolgy Vol.16 No.6

Ni_53-Fe_47 자성박막의 신형전류자기 기전력효과

정한,손희영,김미양,장현숙,이장로,이용호 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.17 No.-

진공증착방법으로 제작한 Ni_53-Fe_47 박막에 관한 신형전류자기 기전력효과의 전류와 자장 방향이 만드는 각 θ 의존성이, 자기저항효과의 cos 2θ, Hall 1 효과의 경우 sin 2θ로 관측되고, 이 효과의 자장에 의존하는 전압변화율이 자기저항효과와 비교할 때 차수가 다르게 큰 것이 조사된다. 이 효과가 2 Carrier형 모델로 이해할 수 있음을 이론적으로 확인된다. A new Galvanomagnetic electromotive force effect of Ni_53-Fe_47 thin films is studied. The dependence of this effect on θ, angle between the current and the magnetic field, is found to be the form of sin 2θ, in contrast with that of the magnetoresistance effect cos 2θ and that of the Hall effect sin θ. Property of this effect is that the rate of the voltage variation depending on the magnetic field is extremely large as compared with the magnetiresistance effect. It is theoretically confirmed that this effect is well understood on the basis of the two carrier types model.

水稻의 穗發芽性에 關한 硏究 (Ⅱ) 栽培時期 移動에 따른 穗發芽性

趙東三,孫錫龍,金鍾煥,尹太,朴成圭,權圭七 충북대학교 농업과학기술연구소 1988 農業科學硏究 Vol.6 No.1

This study was conducted in 1987 to investigate the viviparous germination in rice. Six varieties, i. e., Daeseongbyeo, Sangpungbyeo Hwaseongbyeo, Taebagbyeo, Chilseongbyeo and Samgangbyeo were used for this experiment. Seedlings were transplanted on May 25 and dune 5 and panicles were harvested 5 times with 5 days interval beginning 25 days after heading. Panicles were incubated at normal temperature right after harvest to observe the germination. Rate of viviparous germination of Japonica type was higher than that of Indica type. The early varieties such as Daeseongbyeo, showed high viviparous germination. Rate of viviparous germination of May 25 transplanting was higher than that of June 5 transplanting. Viviparous germination rate of Japonica type appeared to be increased as the harvesting was postponed. On the other hand, Indica type didn't show viviparous germinate. Based on this study the optimum harvesting time of tested varieties appeared to be between 40 to 45 days after heading.

Ni53-Fe47자성박막의 신형전류자기 기전력효과

정한,손희영,김미양,장현숙,이장로,이용호 숙명여자대학교 자연과학연구소 1994 자연과학논문집 Vol.- No.5

진공증착방법으로 제작한 Ni53-Fe47 박막에 관한 신형전류자기 기전력효과의, 전류와 자장 방향이 만드는 각θ의존성이, 자기저항효과의 cos 2θ, Hall 1효과의 경우 sin θ임에 대하여 sin 2θ로 관측되고, 이 효과의 자장에 의존하는 전압변화율이 자기저항효과와 비교할 때 차수가 다르게 큰 것이 조사된다. 이 효과가 2 Carrier형 모델로 이해 할 수 있음을 이론적으로 확인된다. A new Galvanomagnetic electromotive force effect of Ni53-Fe47 thin films is studied. The dependence of this effect on θ, angle between the current and the magnetic field, is found to be the form of sin 2θ, in contrast with that of the magnetoresistance effect cos2θand that of the Hall effect sinθ. Property of this effect is that 1the rate of the voltage variation depending on the magnetic field is extremely large as compared with the magnetiresistance effect. It is theoretically confirmed that this effect is well understood on the basis of the two carrier types model.