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부처손속 (부처손과)의 미기록종: 각시비늘이끼 (Selaginella heterostachys Baker (Selaginellaceae): first report for Korea)

이창숙;김유성;이남숙
- 식물분류학회지
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- 제38권4호
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- pp.557-563
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- 2008
Selaginella heterostachys Baker (Selaginellaceae), previously known only from southern Japan, China, Taiwan and Vietnam, was found on sunny slopes at forest edges, Gangchon-ri, Chuncheon-si, Gangwon-do. This species is distinguished from the related taxon by ovate lateral microphylls with shallowly cordate base and elongated median microphylls with recurved apex. The local name Gak-si-bi-neul-ikki, meaning of the bride's skirt shape of median microphylls with recurved apex rather than S. nipponica. The morphological characters and illustrations of this species are provided with photographs of the habit.
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인삼의 유효성분에 관한 생화학적 연구 (VIII). 빵효모의 핵산대사에 미치는 인삼성분의 영향 (Biochemical Studies on the Active Principles of Panax Ginseng (VIII). Effect of Ginseng Extracts on Nucleic acid Metabolism of Baker's Yeast)

김태봉;이희성;이근배;이강석
- 대한화학회지
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- 제20권2호
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- pp.146-152
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- 1976
백삼의 석유에테르추출물(WGpet)은 빵효모의 RNA생합성을 극히 미약하게 촉진시킬 뿐이지만, 백삼의 에탄올추출물(WGpet-alc) 및 홍삼정(RGE)의 성분은 다같이 RNA 생합성을 크게 촉진시킬뿐 아니라, 그 모노누클레오티드의 조성에까지 큰 변화를 일으키는 효과가 있음이 확인되었다. 즉 RGE에 의해 AMP와 CMP는 물론, 특히 UMP가 현저하게 감소된 반면, GMP는 크게 증가되었으며, 그 몰비는 총 모노누클레오티드의 78.5%에 달하였다. 이러한 결과는 인삼성분의 단백질 생합성 촉진효과와도 관련이 있는 퍽 흥미로운 점이라고 하겠다.
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Effects of Temperature, Salinity, and Diet on the Growth and Survival of the Freshwater Rotifer Brachionus angularis

Kim, Byeong-Ho;Kim, Hyung-Seop;Jo, Soo-Gun
- Fisheries and Aquatic Sciences
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- 제9권4호
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- pp.160-166
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- 2006
We explored the possibilities of using the freshwater rotifer Brachionus angularis as a live food for small fishes cultured in fresh- or brackish waters. Brachionus angularis were collected from a reservoir for isolation and laboratory culture. Length and width of the lorica were $102.3{\mu}m$ and $76.6{\mu}m$, respectively, and those of amictic eggs were $64.4{\mu}m\;and\;47.9{\mu}m$, respectively. When their growth rates were examined at six different temperatures, i.e., 15, 20, 25, 30, 35, and $40^{\circ}C$, the highest daily growth rate of 0.801 was observed at $35^{\circ}C$, and growth was lower with decreasing temperature. Adaptation to salinity change was evaluated with two different modes of salinity increase: step-wise elevation lasting for short durations of 5 to 30 min or a long duration of 24 h. With the short duration modes, no individuals survived salinity higher than 10 psu, and the number of live individuals did not increase throughout the experiment. However, in the 24-h elevation, the number of individuals increased when salinity was elevated by 1 to 2 psu per day for the first 2 or 3 days, while no increase in number occurred at salinity increments higher than 3 psu per day. In addition, to assess the effect of different diets, four single-component diets (Chlorella vulgaris, Nannochloris sp., baker's yeast, or dry yeast) and three combination diets (C. vulgaris + Nannochloris sp. + baker's yeast + dry yeast; C. vulgaris 70% + baker's yeast 30%; C. vulgaris 30% + baker's yeast 70%) were used. The specific growth rates of B. angularis fed combination diets were higher than those of rotifers fed any single-component diet, with the highest rate of 0.648 in B. angularis fed a mixture of C. vulgaris, Nannochloris sp., baker's yeast, and dry yeast, and the lowest rate of 0.200 in those fed dry yeast only. Our results indicate that the freshwater rotifer B. angularis can be used for seedling production of both freshwater and brackish-water fishes that require small (less than about $120{\mu}m$) live food during their early stages.
https://doi.org/10.5657/fas.2006.9.4.160 인용 PDF KSCI