• The Korean Journal of Zoology
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• v.4 no.2
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• pp.1-6
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• 1961

바지락(Tapes philippinarum) 직모연동능에 미치는 몇가지 중요한 환경 요인의 영향에 관하여 생리학적 방법으로 조사하였다. 1. 산화환워전위 측정결과, 치매일수록 성매에 비하여 무기상태에 대한 저항성이 낮았다. 2. 치매의 직모연동능은 17$\pm$1$^{\circ}C$에서 산소장력 저하상태로 \ulcorner긴 20분후, 성매의 약 1/2 이하로 감소되었따. 3. 한편 수온 13$\pm$1$^{\circ}C$dpt는 직모운동능이 같은 산소장력의 저하에 의하여서도 성매 치매 모두가 비슷한 경향으로 급격히 억제되었다. 4. 수온 1$0^{\circ}C$에서 20 $^{\circ}C$로 옮겼을 때 성매와 치매의 직모연동능은 수온으로 인하여 거의 평행하게 최고치 약 2305까지 촉진되었다. 5. 특히 치매에 있어서는 부유토분자의 낮은 혼촉도에 의하여 직모연동능이 감소되었다. 6 바지락은 광감성물질임을 밝혔다. 7 . 이들 결과로서 치매의 높은 치사율은 해저서식지의 불리한 환경요인 특히 중량요인에 좌우되는 것임이 확실하다. 치사율을 좌우하는 가장 중요한 요인은 용존산소의 결지, 저온 그리고 심한 부유토의 온촉도이며 반하여 약간의 염도변동은 그리 치명적인 것이 아니다.

• The Research Journal of the Costume Culture
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• v.14 no.6
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• pp.945-955
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• 2006

The purpose of this study was to examine the effect of hair style and hair color on women's impression formation. The experimental design was $2{\times}3{\times}3$ (hair wave$\times$hair length$\times$hair color) factorial design by 3 independent variables. Subjects were 343 women in Seoul. Four factors were derived to account for the dimensions of impression formation. These were neatness, sociability, attractiveness, and femininity. The straight hairs were evaluated neater than the permed hairs, and the permed hairs were evaluated higher in sociability and attractiveness. The short hairs were perceived highest in sociability, and the long hairs were perceived high in attractiveness and femininity. The black hairs were perceived highest in neatness, the bright brown were perceived high in sociability and attractiveness, and dark brown were perceived high in femininity. Attractiveness had significant interaction effects depending on three independent variables: hair wave, lengths, and colors. Long black straight hair was perceived most attractive, and midium length black straight hair was least attractive. The light brown permed hairs were perceived high in attractiveness regardless of hair length. In the case of straight hair, the longer the hair length was, the younger the object women were perceived. The women with the long permed hair were perceived older than the women with short and midium length permed hair.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.10 no.2
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• pp.71-96
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• 1977

Early development Linuparus trigonus(von Siebold) has been studied based on the samples collected monthly in Je-ju Island, Korea from February, 1975 to January, 1977. Gametogenesis, reproductive cycle, embryonic development were investigated by histological mettled, and morphological description was made on the first phyllosoma larva which reared in the laboratory. Testis is composed of two tubular duct which are symmetrical with H-shaped appearance. Outer layer of testis is of fibrous connective tissue capsule. In the lumen there is a convoluted seminiferous tubule with interstitial tissue. Ovary is a pair of symmetrical blind tubular lobes, and the midportions are connected each other. The ovary consists of a couple of ovarian sacs partitioned by two-layered connective tissue fibers. Proliferation of spermatogonia are observed all the year around on the germinal epithelium of seminiferous tubule. Partial spermatogenesis is always in progress, and the spermatozoa appear all the year around in the tubules. Nutrition of early oogonia is supplied by fibrous mesenchyme which is abundantly distributed in ovarian sacs. Oocytes grow and couplete maturation divisions in the follicle layers. They finally develop into mature ova before spawning. Reproductive cycle is classified into four successive stages; multiplication stage from September to December, growing stage from January to March, maturation division stage from April to May and mature stage from June to August. Spawning takes place from May to August with peak spawning from Into July to early August. Cleavage type is superficial. Blastopore is formed in blasto-disc region which is proliferation of blastoderm cells. Germinal layers are also derived from tile region. Mesoderm formation is originated from endodermal cells which are formed front the blasto-disc region. The endodermal cells are separated by the process of delamination from yolk sac and take part in the formation of the mid-gut. Morphological characteristics of first phyllosoma larva are different from the larvae of other Palinurid and Scyllarid species.