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        검색결과 2

        1.
        2013.10 구독 인증기관·개인회원 무료
        This is the first record of endoparasitic Hymenoptera Apanteles galleriae recorded from Apis cerana colonies in Korea. A simple rearing protocol was established to allow the morphology, mating behavior and infestation rate of A galleriae. In total, 55 lesser wax moth fresh cocoons were kept in the tissue culture test plate at room temperature (25.6 ± 1.5˚C, RH 21 ± 3.7%). The females were 3.4 ± 0.3 longer than male 3.3 ± 0.2. The male antenna was longer than females. The copulation lasts 24.4 ± 2.4 seconds. The larvae of A. galleriae were pupated inside the cocoons of lesser wax moth. Ninety percent of adults A. galleriae was successfully emerged from the lesser wax moth cocoons. A. galleriae can be used as bio-logical control in store and in live colonies to control lesser wax moth.
        2.
        2005.09 KCI 등재 서비스 종료(열람 제한)
        A new structure of the Wilkinson power divider that can suppress multiple harmonics output is presented The power divider consists of T-type or π-type capacitive loads and shunt resistors. Experimental results show that this power divider suppresses the second and the third harmonic components to less than -38dB, while maintaining the characteristics of a conventional Wilkinson power divider, featuring an equal power split, a simultaneous impedance matching at all ports and a good isolation between output ports.