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협회소식

한국오리협회
- Monthly Duck's Village
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- s.165
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- pp.79-79
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- 2017
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Ferromagnetic Resonance for $Co_{79}Cr_{21}$ Thin Film ($Co_{79}Cr_{21}$ 박막의 강자성 공명 연구)

백종성;김약연;임우영
- Journal of the Korean Magnetics Society
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- v.3 no.2
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- pp.125-129
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- 1993
The magnetic properties of RF magnetron sputtered $Co_{79}Cr_{21}(at.%)$ thin film have been examined by using of ferromagnetic resonance. The properties of $Co_{79}Cr_{21}$ thin film show the effective first order anisotropy constant of $2.91{\times}10^{5}\;erg/cm^{3}$, the effective anisotropy field of 2526 Oe, and the spectroscopic splitting factor of 2.17. The torque experimental results, analyzed by employing modified Artman method, coincide with the ferromagnetic res-onance experimental results.
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Pathological Studies on the New Microsporidia K79 Isolated from the Silkworm, Bombyx mori L. II. Pathogenicity and Developmental Progress of the Microsporidia. (가잠에서 분리된 새로운 미포자충 K79의 병리학적 연구 II. 미포자충의 병원성 및 발육경과)

윤재수;임종성
- Journal of Sericultural and Entomological Science
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- v.27 no.1
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- pp.1-11
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- 1985
In order to clarify the taxanomic position of a new microsporidia K79 which was isolated from the silkworm larvae, Bombyx mori L. in Korea in 1979, the following several experiments such as estimation of pathogenicity in different instar, histopathological examination under light and electronic microscope and examination of fine structure of the sporse were carried out and their result obtained are as follows. In the test of pathogenicity by oral inoculation, the new microsporidia K79 was lower than Nosema bombycis and the susceptibility of the new microsporidia to silkworm was getting lower as the silkworm larvae grew. The lesion of Silkworms' tissue which was infected with the new microsporidia K79 was found in the epithelial cells of trachea, fat body and silk gland cells. The developmental process of the new microsporidia K79 in vivo could be divided into the following five stages: sporoplasm, schizont, sporont, sporoblast, and spore. The process was just the same as the of N. bombycis, but its development was slower than that of N. bombycis. Several differences in the fine structure of the spore under electron microscope, which could be important keys for the classification of microsporidia, were obtained. Anchoring disk and polaroplast lamella of the new microsporidian spore were disclosed to be different from those of N. bombycis. An average number of polar filament coils of the new microporidian spore was 16 at an angle of 75$^{\circ}$. On the basis of various keys for the classification of microsporidia, the results obtained from various experiments proved that the newly isolated microsporidia should be classified into the Genus, "Nosema", nut is further classification for species should be conducted in the future. Therefore, it may be reasonable that the new microsporidia is temperally classified as Nosema sp. K79 considering the fact that it was discovered in Korea in 1979.a in 1979.
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