• Animal cells and systems
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• 제8권4호
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• pp.329-333
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• 2004

Japanese flounder (Paralichthys olivaceus) head kidney (HK) leukocytes were incubated with $10^3$ to $10^{-3}$ ng levamisole/ml for 4, 24 or 48 h and then assayed for their natural cytotoxic activity against xenogeneic tumor cells. This activity was slightly increased after 24 h of incubation. In a second experiment, fish were fed 0, 75, 150 or 300 mg levamisole/kg diet for 10 consecutive days. The fish were then fed a commercial non-supplemented diet and sampled 0, 1, 2, 3, 4 or 6 weeks post-administration of levamisole. The cytotoxic activity was found to be increased with increasing levamisole dose and remained greatly enhanced until the end of the experiment. In conclusion, levamisole enhanced flounder natural cytotoxic cell activity both in vitro and in vivo and had a great lasting action when administered by feeding.

• Animal cells and systems
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• 제8권4호
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• pp.247-250
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• 2004

A taxonomic study on marine sponges was conducted by SCUBA diving at Gageodo Island, Korea from August 1999 to July 2001. Among them, Haliclona (Gellius) coreana n. sp. turned out to be new to science. This new species seems to be close to H. (G.) arcoferus Vosmaer, 1885, based on the type of spicules. However, it is different in size of toxa and growth form. Toxa of the new species is half in length compared to H. (G.) arcoferus. The growth form is jar shaped in this new species, but flat in H. (G.) arcoferus.

• Animal cells and systems
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• 제7권3호
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• pp.221-225
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• 2003

The tadpole larva of the ascidian Halocynthia roretzi has two sensory pigment cells in its brain vesicle. To elucidate the temporal requirement for FGF signaling in formation of the pigment cells, embryos were treated with an FGF receptor 1 inhibitor, SU5402, or an MEK inhibitor, U0126 during various embryonic stages. In the present study, it is shown that the embryos treated with SU5402 from the 16-cell stage to the early gastrula stage do not form pigment cells, whereas those treated after the early gastrula stage form pigment cells. In pigment cell formation, embryos suddenly exhibited the sensitivity to SU5402 only for 1 h at the neural plate stage(-4 h after the beginning of gastrulation). When U0126 treatment was carried out at various stages between the 8-cell and late neurula stages, the embryos scarcely formed pigment cells. Pigment cell formation occurred when the embryos were placed in U0126 at early tail bud stage. These results indicate that FGF signaling is involved in pigment cell formation at two separate processes during ascidian embryogenesis, whereas more prolonged period is required for MEK signaling.

• Animal cells and systems
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• 제10권2호
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• pp.109-114
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• 2006

A study on marine sponges was conducted with the materials collected by SCUBA diving in Hongdo and Gageodo Islands, Korea from September 2004 to July 2005. Clathria (Clathria) hongdoensis n. sp. and Clathria (Clathria) sohuksanensis n. sp. turned out to be new to the science. Clathria (Clathria) hongdoensis n. sp. closely seems to C. (C.) acanthstyli Hoshino (1981), based on their spicules type. However, they differ in the size of spicules and growth form. Clathria (Clathria) sohuksanensis n. sp. is similar to C. (C.) bicalthrata Hooper (1996), except for lacking small toxas.

• Animal cells and systems
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• 제2권3호
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• pp.323-331
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• 1998

Three new marine heterotardigrades, Archechiniscus symbalanus, and Styraconyx craticuliformis of the family Halechiniscidae and Echiniscoides andamanensis of the family Echiniscoididae, are reported on the basis of the specimens sieved from intertidal barnacles in the Thai coast of the Andaman Sea. Archechinisos symbalanus n. sp. is related to Archehiniscus minutus Grimaldi De Zio and D'Addabbo Gallo, but discernible from it by possessing median cirrus, stylet sheath, sensory spine of leg l, prominent basal processes on all leg pairs, and S-shaped seminal receptacles. Styraconyx craticuliformis n. sp. is similar to S. craticulus (Pollock) in bearing the grid-like dorsal cuticle, but distinguished from it by the shape of claws and cirrophore of primary clava. Ediniscoides andamanensis n. sp. is rebated to Echiniscoides pollocki Hallas and Kristensen and E. sigismundi sigismundi (M. Schultze) in sharing the same patterns of sensory leg appendages and the claw configuration of 8-8-8-7, but characterized by the shape of cirri, pharyngeal apparatus and female gonopore.

• Animal Systematics, Evolution and Diversity
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• 제18권1호
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• pp.135-141
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• 2002

남해의 서쪽 끝에 위치한 만재도의 조하대로부터 1988년 8월 23일에 채집된 태형동물을 분류한 결과 고운입이끼벌레 (Parasmittina delicatula)가 한국미 기록종으로 밝혀졌다. 만재도에서 보고된 12종 중 10종은 오직 태평양에서만 밝혀진 종들로서 4종은 열대종, 3종은 한류의 영향을 받는 곳에서도 보고되는 종이고 4종은 한국과 일본에서만 밝혀진 고유종이다. 만재도는 대마난류와 서해연안냉수의 영향을 모두 받는 동물지리학적으로 독특하며 중요한 지점으로 여겨진다.

• Animal Systematics, Evolution and Diversity
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• 제8권1호
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• pp.69-88
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• 1992

1989년 7월 12일부터 17일까지 울릉도의 10개 지점에서 채집되고 일부 기증받은 해산 신복족류와 기안류의 표본들을 동정한 결과 모두 7과 14속 19종이 되었다. 이로서 울릉도의 신복족목 16종과 기안목 2종이 울릉도 미기록종으로 추가되었으며, 이들 중 Zafrona(Clathranachis) Japonica(A. Adams, 1960), Enzinopsis menkeana(Dunker, 1860), Pollia mollis(Gould,1860)등 3종은 한국 미기록종이다.

• 대한조선학회지
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• 제18권3호
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• pp.11-27
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• 1981

This paper is prepared to solve the problem of two-dimensional sinusoidal motion of hydrofoil, which can be related not only to the prediction of unsteady forces acting on the marine propeller blade but to the study of aquatic animal's undulatory mode of propulsion. For convenience's shake, this manuscript can be devided into two parts. In the first part, the lift and moment coefficients have been calculated by the method of conformal transformation. In the other part, the thrust and the hydromechanical efficiency have been evaluated, using Lagally's technique having extended to the unsteady case, they also have been compared with the results, which had been obtained by Lighthill[6] and Wu[7] using Prandtl's acceleration potential.

• Animal cells and systems
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• 제15권1호
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• pp.63-72
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• 2011

A new species belonging to the genus Cyclopinoides Lindberg, 1953 (Cyclopinidae) is described from three beaches in Korea and Japan, as the first record of the genus from the Pacific. Among five species currently recognized in the genus, the new species resembles C. schulzi Herbst, 1964 from the Red Sea in sharing the character combination of 20-segmented antennule and stumpy caudal rami. However, C. orientalis n. sp. differs from it by relatively longer caudal rami (2.5-2.8 times as long as wide in female and about 1.6-1.8 times in male, while less than 2 times in female and about 1.3 times in male of C. schulzi), and by the transformation of an outer distal spine to a slender seta on the distal exopodal segment of leg 4. Moreover, C. orientalis n. sp. is discernible from C. schulzi in having a pyriform copulatory tube (against elongated tubular style in C. schulzi). A key to the species hitherto known in the genus is provided.

• Animal Systematics, Evolution and Diversity
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• 제20권1호
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• pp.9-19
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• 2004

한국 남부지역에서 채집된 꼬마새우류 2종, 꼬마새우(Hippolyte acuta) 와 날씬넓적뿔꼬마새우(Latreutes acicularis)가 한국 미기록종으로 판명되어 재기재하고 보고하였다 . 이미 보고된 넓적뿔꼬마새우속의 긴넓적뿔꼬마새우 (L. laminirostris)를 재기재하고 한국산 넓적뿔꼬마새우속 종에 대한 검색표를 제시하였다. 지금까지 보고된 한국산 꼬마새우과는 모두 9속 19종이 된다.