• The Journal of Dong Guk Oriental Medicine
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• v.6 no.1
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• pp.107-115
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• 1997

Hapatic tissues of ICR mouse intraperitoneally injected with Triton WR-1339 were observed to investigate the morphologic change of liver by destruction of lipid metabolism as hyperlipidemia. The hepatic tissues were obtained at hour-24, 48, and 72 after triton injection that were fixed in fromol-calcium solution and were cryocut. These tissues were stained by H&E for general morphology, sudan black B for lipid, and perchloric acid-naphthoquinone method for cholesterol. The increase of hepatocyte having meshlike cytoplasm were shown in all hepatic lobules after triton injection and the hepatic plates were disappeared in the region aggregated meshlike hepatocyte. The number of blue black colored lipid drop and dark green colored asterisk shaped cholesterol particle in hepatic cytoplasm were increased than the saline injected mouse and the size of lipid drop was enlarged. As results indicated that the lipid metabolism were destructed by triton injection, subsequently hepatocyes accumulated with lipid including cholesterol.

• The Korean Journal of Ecology
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• v.28 no.5
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• pp.281-286
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• 2005

The ripe unfertilized eggs of Acheilognathus signifer were elliptical shape and baggily swollen toward animal pole. The size of fertilized eggs were $2.19{\pm}0.01$ mm in long axis and $1.85{\pm}0.08$ mm in short axis and oil globe were not observed. The zona radiata of A. signifer had the structure of regular fibrilar net and the diameter of outer opening micropyle was about $2.5{\mu}m$ and that of inner opening micropyle was about $1.5\sim2.0{\mu}m$. Development of fertilized eggs in A. signifer was proceeded in inclining position of animal pole and hatched in 49 hours under $20{\pm}1^{\circ}C$. The yolk sac was absolutely absorbed in 21 days after hatching.

• Journal of Sericultural and Entomological Science
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• v.30 no.2
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• pp.88-95
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• 1988

The structure ki mutant chorion is described by the ultrastructural level with the scanning electron microscope. The micropyle on the anterior, posterior, leteral and dorsal side region surface patterns do not so much differ from ki mutant and normal strains. The surface structure of ventral side of ki mutant, which is the presumptive embryonic region in oocytes, were netted part corresponding to the boundary of follicle cells that is similar to lateral side structure of egg-shell. The eggshell thickness of ventral side on the ki mutant is mostly thicker. However, the structure of transverse section of normal and ki mutant egg-shell are composed of the outer, middle and inner layers. The ki not effects the formation of the lamellar layer in the egg-shell. It is observed that the characteristic structure in ki mutant egg chorion may be attributed to a areal specificity of epithelium in ventral side of egg-shell formation, and it affects the process of the accumulation of secreted chorionic material and the egg-shell architecture.

• Journal of Sericultural and Entomological Science
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• v.36 no.1
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• pp.30-36
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• 1994

choChorion(egg-shell) morphology of the F1 hybrid between Bombyx mori and Bombyx mandarina has been observed by scanning electrom microscope and chorion protein was analyzed by electrophoresis. The chorion surface structure of F1 hybrids in the lateral(flat) region was similar to that of maternal line. The F1 hybrids chorion was found to have basically a three layer structure. The middle and inner layer were very much like those of the Bombyx mandarina and Bombyx mori. There were many conic pillar structures in the outer layer of the F1 hybrid, which was similar to Bombyx mandarina. This conic pillar structure had a thin cover layer was more clear in the dorsal and ventral side of the F1 hybrid chorion. The conic pillar structure of Bombyx mandarina was found to be dominant in F1 hybrid chorion irrespective of their maternal line. Major components of chorion protein were analyzed by two-dimensional electrophoresis and found to have isoelectric points in the range of pH 4.0-6.5 and molecular weight 10 to 50 kd. F1 hybrid chorion protein components related directly to those of the maternal line. The conic pillar structure was dominat characteristic and it was present in all F1 hybrid.

• Proceedings of KOSOMES biannual meeting
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• 2009.06a
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• pp.157-158
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• 2009

Phytoplankton plays an important part as indicator and primary producer in marine ecosystem. Therefore, phytoplankton community appeared variously according to marine environment, so the data of nutrients, chlorophyll a, temperature, salinity, and DO were analyzed in seagrass bed of Yeoja Bay. Consequently, the phytoplankton community structures were associated with investigation time and place, and seen difference according to the existence and nonexistence of seagrass bed.

• Proceedings of the KIEE Conference
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• 2006.11a
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• pp.348-350
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• 2006

전력회사는 전력의 안정성과 신뢰도확보를 위해 끊임없이 노력하고 있지만 전력설비의 자그마한 이상에도 그 파급효과는 상당히 클 수 있다. 특히 한국의 전력계통은 복잡한 그물망 구조를 가지고 있어 작은 선로사고가 국가 전체의 대형정전사고로 이어질 가능성을 가지고 있다. 특히 전력산업의 변화에 의해 전력계통의 대형정전사고의 책임 문제도 발생할 수 있다. 전력선의 사고의 대다수가 1선 지락 사고로 발생되며, 그중에 애자의 절연파괴로 인한 사고가 상당수를 차지하고 있다. 그러나 애자의 절연파괴는 가시적으로 발전하기 어려운 것이 사실이다. 그러므로 본 논문은 센서 및 통신 장비를 이용하여 쉽게 애자의 절연 파괴를 감지하고, 이를 신속하게 운영자에게 알릴 수 있는 시스템의 개요에 대하여 논한다.

• Journal of the Society of Naval Architects of Korea
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• v.38 no.1
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• pp.37-42
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• 2001

This paper proposes a new wave absorber made of flexible net structures. The motivation of this research is that the wave absorbers which already invented are not effective in small wave flume. To test the efficiency of the proposed water absorber, experiments were done for various wave length, the length of the wave absorber, and the areas of the wave absorber. The proposed new wave absorber demonstrated its efficiency when used in small-length wave flume.

• Journal of the Semiconductor & Display Technology
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• v.19 no.3
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• pp.36-42
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• 2020

Silver nanowire (AgNW) random-meshes with high transmittance, low sheet resistance, and high oxidation stability and flexibility were fabricated using solution-based processes. The random-mesh structure was obtained by forming bubbles whose sizes and densities were controlled using a corona treatment of polyethylene terephthalate (PET) substrates. To reduce the sheet resistance of the fabricated AgNW electrode, a washing process using ethanol solution was performed. In addition, nickel (Ni) was coated on AgNW to improve resistance to oxidation. The effects of corona treatment and Ni-coating on the transmittance, sheet resistance, oxidation stability, and flexibility of the AgNW electrodes were investigated.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.81-82
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• 2001

최근 세계는 각종 어로기기 및 어구어법 기술의 발달로 인한 자원남획에 대한 우려로 자원관리형 어업에 대해 새로운 인식을 하게 되었고, 남획문제를 해결하기 위한 다각도의 노력을 기울이고 있다. 그러나 우리 나라 연근해에서 조업하고 있는 대표적인 어업인 트롤어업은 타 어구에 비하여 어획성능이 매우 우수하여 자원남획의 소지가 많고, 다이아몬드형 망지의 구조적 특성으로 인해 소형어류의 탈출이 어렵고, 탈출한 어류도 탈출시의 어체손상으로 생존율이 극히 저조할 것으로 추정되어 자원관리의 주 대상 어업으로 등장하고 있는 실정이다. (중략)

• Korean Journal of Optics and Photonics
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• v.3 no.3
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• pp.167-171
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• 1992

We present the static and dynamic light scattering results of the salt induced restructured colloidal silica aggregates. We also report the results from the transmission electron micrographs which confirms the individual sizes of the particles and the local structure of the ramified aggregates. The fractal dimensions of the restructuring silica aggregates are considerably different with in-situ light scattering measurements. The measured fractal dimensions, $D_{F}$, is 2.21 for the 0.5 wt.% concentration of the salt induced Ludox-AM. The Rayleigh linewidth for 0.1 wt.% concentration of Ludox-AM is discussed.