• 한국가금학회:학술대회논문집
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• 한국가금학회 2000년도 제17차 정기총회 및 학술발표
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• pp.85-87
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• 2000

To obtain the genetic information of Korean native livestock, the karyotyping of Korean native chick were performed by high-resolution banding technique. The chromosomes were prepared from lymphocyte culture and early embryos with 200 Korean native chick which have been raised at National Livestock Research Institute. There were no significant difference between Korean native chick and Leghorn in the number of chromosomes and chromosomal morphological pattern. Using high resolution banding technique, the yield of G-bands of prophase is much greater than that can be obtained by International System for Standardzed Avian Karyotypes(ISSAK, 1999). The G-band landmarks of Korean native chick were similar to those of ISSAK and Leghorn except some macrochromosomes. chromosome Z and 3 had C-band variants with heteromorphic patterns on distal and centromeric site. The proportion of constitutive heterochromatin, the heterochromatin ratio of Korean native chick was significantly more than that of Leghorn in all chromosomes.

• 한국동물학회지
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• 제33권3호
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• pp.260-265
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• 1990

강원도 강릉 남대천과 옥계 수림천에서 채집된 가시고기와 잔가시고기를 대상으로 외부형태의 성적 이형을 조사하였다. 조사된 형질 중 가장 뚜렷한 성적 이형을 나타내는 것은 체장에 대한 두장의 비율로서, 수컷의 두장이 암컷의 것보다 더 긴 것으로 나타났다. 그 밖에 문장 / 체장, 항문부 체고 / 체장의 비율에서도 암수간의 차이를 나타내는 경향이 있었다. 이들 어류에서 두장의 성적 이형이 나타나는 원인을 동물행동학적인 면에서 논의하였다.

• 한국자원식물학회지
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• 제11권2호
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• pp.168-172
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• 1998

The morphlogical characteristics and cytotoxic acitivity for14 local varieties fo Codonopsis lanceolata collected from Korea were examined to get basic data for breeding and selection of good cultivars. Plant height ranged from 197.2 cm to 253.2 com, that from Beakunsan(No.11) was the highest and and that form Samcheok(No.5) was the lowest. Generally, plant height of those form northern area of Korea tends to be shorter than those from Southern area. Leaf width and length of that form Husando (No. 12) was the largest While that form chejudo(No.4) was the smallest and those from other areas showed no significant difference. As to the number of branches, that form Yanggu(No.1) was theleast and those from other areas did not show Chejudo(No.14) were the heaviest. Among 14 varieties tested, Heongseong(No.3) and Huksando(No.6) exhibited strong cytotoxicity , which showed 45.0 an d62.0$\mu\textrm{g}$. $m\ell$ respectively.

• 한국임상수의학회:학술대회논문집
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• 한국임상수의학회 2009년도 춘계학술대회
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• pp.127-133
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• 2009

Cardiomyopathies were previously defined as "an idiopathic myocardial disease that is not secondary to any other type of congenital/acquired heart disease or systemic diseases." With increasing understanding of etiology and pathogenesis in human medicine, the difference between cardiomyopathy and specific heart muscle disease has become indistinct. Cardiomyopathies are now classified by the dominant pathophysiology or, if possible, by etiological/pathogenetic factors. The American Heart Association recently advocated the following new definition of cardiomyopathy: Cardiomyopathies are a heterogeneous group of diseases of the myocardium associated with mechanical and/or electrical dysfunction that usually (but not invariably) exhibit inappropriate ventricular hypertrophy or dilatation and are due to a variety of causes that frequently are genetic. Cardiomyopathies either are confined to the heart or are part of generalized systemic disorders, often leading to cardiovascular death or progressive heart failure-related disability. Because the understanding of etiology or pathogenesis of cardiomyopathy has been limited in veterinary medicine, the previous classification is generally used. It is considered a dilated, hypertrophic and restrictive group on the basis of the predominant morphological and functional abnormalities. In addition, arrhythmogenic right ventricular cardiomyopathy and unclassified cardiomyopathy were also recognized in dogs and/or cats.

• Journal of Plant Biology
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• 제18권4호
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• pp.150-154
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• 1975

Four kinds of Nicotiana species and five varieties belonging to N. tabacum were used as materials for electrophoretic analysis of the tetrazolium oxidase isozyme to examine the taxonomic affinity among them based on the biochemical property. All the five verieties of N. tabacum showed same isozyme bands despite the fact that these varieties had notably varied characteristics including morphological traits. The band patterns were more or less different among the four species. Although N. rustica and N. tabacum were of the same genome group of AABB, their isozyme bands showed considerable difference. N. sylvestris, genome A donor of Nicotiana species, was found to be markedly different from N. tatacum in band pattern, including the absence of system 2 in N. sylvestris.

• Animal cells and systems
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• 제16권2호
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• pp.135-144
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• 2012

$Dendronephthya$ $castanea$ Utinomi, 1952 is a member of the family Nephtheidae, and dominates shallow waters adjacent to the southern part of Jejudo Island, Korea. This species is a gonochoric internal brooder with a sex ratio of 1:1, and releases planulae around the time of the full and new moon from July to September, when the seawater temperature peaks. The gametogenic cycle is annual, and oogenesis (12 months) is longer than spermatogenesis (4-5 months). No difference in reproductive features including sexuality, sex ratio, gametogenesis and gametogenic cycles was found between the sympatric species $D.$ $castanea$ and $D.$ $gigantea$, and there was no temporal reproductive isolation. Investigation of the morphological taxonomy and molecular biology of these species indicates that they have very similar or identical traits, suggesting an absence of speciation and a need for taxonomic reclassification.

• 반도체디스플레이기술학회지
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• 제3권3호
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• pp.5-9
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• 2004

A new wafer level packaging scheme is presented as an alternative to MEMS package. The proof-of-concept structure is fabricated and evaluated to confirm the feasibility of the idea for MEMS wafer level packaging. The scheme of this work is developed using an electroplated tin (Sn) solder. The critical difference over conventional ones is that wafers are laterally bonded by solder reflow after LEGO-like assembly. This lateral bonding scheme has merits basically in morphological insensitivity and its better bonding strength over conventional ones and also enables not only the hermetic sealing but also its electrical interconnection solving an open-circuit problem by notching through via-hole. The bonding strength of the lateral bonding is over 30 Mpa as evaluated under shear and the hermeticity of the encapsulation is 2.0$\times10^{-9}$mbar.$l$/sec as examined by pressurized Helium leak rate. Results show that the new scheme is feasible and could be an alternative method for high yield wafer level packaging.

• 천문학논총
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• 제30권2호
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• pp.59-60
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• 2015

High resolution, multi-wavelength images from the Dutch Open Telescope were used to study the detailed mechanisms that might be involved in the multiple layer solar atmosphere observed in high cadence multi-wavelength observations. With the exceptional data observed for active region NOAA 10789 on 2005 July 13th, we study the changing pattern of the fibril using multi-wavelength tomography of the $H{\alpha}$ line center and blue wing, Ca II H, and the G Band. It is believed that a long fibril that is rooted in the umbra, with longer apparent periodicity, may be due to morphological changes. To determine this, we conduct phase difference and coherency analysis between points along the fibril to understand how the wave propagates.

• 한국정보통신학회논문지
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• 제4권1호
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• pp.123-130
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• 2000

본 논문은 고정된 카메라에서 얻어진 연속 영상으로부터 능동 윤곽선 모델을 이용하여 이동 물체의 윤곽선을 추출하는 방법을 제안한다. 주위 환경 변화에 강인한 처리를 위해 적응 배경 모델을 사용하였다. 물체 분할 모델은 얻어진 배경 영상과 현재 영상의 차영상으로부터 국부 영상의 임계값 이상의 화소를 찾아 연결한 영역을 분할하며, 형태학적 필터에 의하여 이동 물체의 경계 부분에서 발생하는 잡음을 제거하였다 분할된 이동 물체 윤곽선은 능동 윤곽선 모델을 이용하여 보다 정확한 이동 물체의 경계를 추출한다. 제안한 방법을 사용하여 도로 영상에서 실험한 결과를 보였다.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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• pp.433-434
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• 2006

Monosized germanium micro particles are prepared by a newly developed Pulsated Orifice Ejection Method. The obtained particles are categorized into two kinds of the microstructures as refined and coarse ones. The morphological difference is estimated to be determined by the undercooling level during nucleation. Actually, the increase in the temperature of the melt was effective in coarsening the microstructure, because the temperature of the melt intensely relates to the undercooling level. The transition temperature of coarse and refined microstructures is found to be 1300-1350K. Furthermore, a triggered nucleation could improve the crystallinity of the particles in the short separation.