http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 김철영 (검색결과 587 건)
- 무료
- 기관 내 무료
- 유료
-
누에에 대한 低毒性 Bacillus thuringiensis 菌株의 選拔
金哲永,金英勳,姜錫權 한국잠사학회 1986 한국잠사곤충학회지 Vol.28 No.1
Among many microbial pesticides, Bacillus thuringiensis is one of the most hopeful pesticide and some commercial products have been appearing on the market. Because these commercial products contain living spores and toxins of the organism, there is a danger that living spores of B. thuringiensis may be scattered by wind and cause a great damage in the sericulture areas. In order to avoide these risks it is desirable to select the strain which has low pathogenicity to the silkworm, and at the sametime being highly pathogenic to the pest insects. Thus this study has been carried out to acquire some basic informations about the procedure of desirable strain selection. Three strains of B.thuringiensis var. kurstaki, var. dendrolimus and var. aizawai were used for the pathogenicity test on the silkworm, Bombyx mori and the fall webwarm, Iiyphantria cunea. Those strains were investigated by the agarose gel electrophoresis patterns of Plasmid DNA determine whether mutation had occured. Pathogenicity tests were carried out of using isolated crystal proteins and spore-crystal protein to mixtures of each strain, seperatively. In case of using spore-crystal protein mixture, the order of pathogenicity in varities of B. thuringiensis against B. mori and H. cunea were kurstaki, aizawai, dendrolimus and kurstaki, dendrolimus, aizawai, respectively. But using isolated crystal proteins, dendrolimus had the highest toxicity to H. cunea and the lowest toxicity to B. mori among tested three strains. From the above results, dendrolimus was presumed the most desirable strain for using microbial pesticide.
-
-
-
-
-
-
-
-
김철영 명지대학교 공학기술연구소 1993 공학기술연구소 논문집 Vol.8 No.-
Geometric nonlinear stiffness matrices of a cable element with Equivalent Modulus of Elasticity and a general nonlinear truss element are derived. A simple beam-cable structure representing a part of a Cable-Stayed bridge is analyzed for a numerical example. Various initial cable tension forces are applied to the cable which is modeled as one Equivalent Modulus cable element or different numbers of truss element. From the results, relationship between the stiffness, sag and tension force of cable is examined and how the nonlinear behavior of cable is predicted by each of the two elements is studied.
-
RISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
