A Study on the Manufacturing Properties of Elastic Braid

주강 단국대학교 1989 論文集 Vol.23 No.-

탄성 Braid의 특성에 관한 연구(I) ―탄성 Braid구조의 기하학적 이론―

주강,곽영식,Choo, Kang,Kwag, Young-Sig 한국섬유공학회 1985 한국섬유공학회지 Vol.22 No.4

An equation of structural changes in stretching cotton elastic braid was derived by modeling a structure of cotton elastic braid consisting of latex rubber thread as core material, and the structure changes under manufacturing conditions and the effect of the changes on the physical properties were studied. The results obtained are summarized as follows; 1) The strain ratio of the core rubber thread(u) is dependent upon spiral length ratio(${\beta}$). In other words, the strain ratio is dependent upon manufacturing braiding angle($\theta$a), manufacturing drafting ratio(Da) and diameter ratio of covering yarn to core rubber thread ($\phi$). ${\mu}$ shows large values when $\theta$a is decreased to maintain uniformity approaching D=1, and the strain ratio decreases linearly with increasing tan $\theta$a. and the width decreases significantly and the braiding angle decreases linearly, respectively depending upon the drafting ratio of the braid(DB). 3) Results from comparison of the theoretical equations(4) and (8) for width and braiding angle with the experimental values approach the theoretical equation when drafting ratio of core rubber thread(D) and $\theta$a increase. It is anticipated that this fact may be caused by the effect of ${\beta}$. 4) When the structural changes of the elastic braid are considered on the basis of the conception of coefficients of width change(Kw) and braiding angle change(K$\theta$), Kw is dependent upon $\theta$a and K$\theta$ is independent upon both $\theta$a and $\phi$. 5) When the Da is constant, linear relation between K$\theta$ and Kw/D is established and its slope corresponds to Da, nearly coinciding with the experimental curves in Fig. 16. 6) Estimated equations(12) for the manufacturing braiding angle shows optimum conditions within ranges of $\phi$=0.40 to 0.47 and $\theta$a=20$^{\circ}$ to 25$^{\circ}$.

Sump 증후군에 의한 간농양과 위장으로 자발성 농양배액

주강,하창윤,임병렬,신민기,이창민,장현정,민현주,김태효,정운태,이옥재 대한내과학회 2008 대한내과학회 추계학술대회 Vol.2008 No.-

Autoradiography 법에 의한 흰쥐 뇌의 Serotonin 표지 양상

朱剛 慶北大學校 醫科大學 1983 慶北醫大誌 Vol.24 No.1

총 10마리의 Sprague-Dawley rat의 뇌측실에 직접 10^-5 ^3H-5-HT 14㎕/min를 5분간 주사하여 autoradiography법으로 실험한 결과를 요약하면 다음과 같다. Raphe nucleus 에서 銀粒子가 가장 많이 발견되었으며 다음이 시상하부의 paraventricular nucleus 였고 dorsomedialis 와 suprachiasmaticus 에서도 상당히 나타났다. 대뇌피질에서는 cingulate 와 hi-ppocampus에서 발견되었고 전엽후반부에서도 조금 발견되었으며 나머지 부위는 거의 찾아볼 수 없었다. 이상을 요약해 보면 Serotonin의 뇌에서의 역할은 주로 뇌의 내분비적 역할이나 자율신경조절 역할을 담당하는 신경원에서 대부분 나타났으며 연합운동중추 영역에서 발견된 것은 앞으로 계속적인 연구가 필요하다고 본다. Serotonin was detected in individual neuclei of the rat brain by a autoradiographic method. This amine would be unevenly distributed throughout the areas examined. Sprague-Dawley rat was injected ^3H-5-HT (14㎕/min) for 5 min through intraventricle. Rat brain was fixed by glutaraldehyde and washed in ethanol. The staining was performed by thionin cresyl violet. The result are summerized as follows: Highest silver grain of serotonin was found in nuclei of Raphe. In the hypothalamus, the highest grain was found in paraventricular nucieus. In the cerebral cortex, the auther could find the grain in the cingulate, hippocampus and post frontal Gyrus. So in is assumed that serotonin is connected with the nuclei of the neuroendocrine or automatic system and synergic action system.

器官抽出物이 腎發生에 미치는 影響에 對하여

朱剛,李善奎,金達洙,朴洋奎 慶北大學校 醫科大學 1966 慶北醫大誌 Vol.7 No.2

The author expect to know whether the growth of the kidney of chick embryo is influenced by the extracts of some organs. As a test material, 560 eggs of White Leghorn were incubated under the condition of temperature,38±1℃ and relative humidity, 75.0±5%. Of these incubated eggs, only 460 of chick embryos are used as experimental materials. Of these experimental materials, 160 are normal group and rate of incubation, 96%. For experiment, the extracts of brain, kidney and liver of the same species of adult White Leghorn were injected in 36th hour and 72nd hour incubated chick embryo. Random selection of 50 of chick embryo were made from above mentioned 6 group of treatment to measure the weight of kidney and the results were obtained as followings. 1) Inhibition of growth is revealed when extracts of brain, liver and kidney of adult White Leghorn were injected in early chick embryo. (P<0.01) 2) Inhibiting effect on growth of chick embryos is greater by extracts of brain than by extracts of liver and kidney. (P<0.01) 3) Inhibiting action of growth of chick embryos by injection of extracts of brain, liver and kidney is greater in 36th hour incubated chick embryos than 72nd hour incubated chick embryos. (P<0.01)

탄성 Braid의 특성에 관한 연구(II) ―탄성 Braid의 제조조건에 의한 특성변화―

주강,곽영식,Choo, Kang,Kwag, Young-Sig 한국섬유공학회 1985 한국섬유공학회지 Vol.22 No.4

Dependence of physical properties on manufacturing conditions of cotton elastic braid made of core latex rubber thread were studied experimentally. The results as follows; 1) Breaking strength had little effect on braiding angle($\theta$a), and elongation was proportional to tan $\theta$a. 2) Relation between limiting elongation and strain ratio of core latex rubber thread showed a linear function of which slope coresponds to a draft ratio in manufacturing process(Da). 3) Tensile stress was depended on $\theta$a. 4) Stress relaxation behaviour of the elastic braid satisfied the stress relaxation equation of polymerec elastomers as shown below. ln ft=lnfto-K ln n Where K values, rate of stress relaxation of the elastic braid, can be expresses as; K=(0.1101-0.7763u)k When considered the strain ratio of rubber thread, from this equation, calculation of the stress relaxation rate(k) of rubber thread enables the estimation of tensile stress at any time.

포스터 전시 발표 : 내분비-대사 ; 당뇨병성 케톤산증으로 발현된 MELAS (mitochondrial encephalomyopathy, Lactic acidosis, and stroke-Like episodes) 증후군 1예

주강,김은정,이정록,임소희,홍창균,고승현,윤건호,송기호,박성경 대한내과학회 2002 대한내과학회 추계학술대회 Vol.63 No.-

흰 쥐 腦의 梨狀葉에서의 Cholecystokinin-Octapeptide 陽性神經元의 形態學的 特徵 : 免疫組織化學法에 의한 光學 및 電子顯微境的 硏究 A Correlated Light and Electron-Microscopic Study

주강,김은희,조희중 慶北大學校 醫科大學 1988 慶北醫大誌 Vol.29 No.1

흰 쥐 腦의 梨狀葉에서 CCK-8함유 신경원의 형태학적 특징을 알기 위하여 peroxidase antiperoxidase 법을 행한 다음 광학 및 전자현미경으로 관찰한 결과를 요약하면 다음과 같다. 1. CCK-8양성반응물질은 신경원내에 존재했으며 CCK-8양성 신경세포체 및 양성신경섬유는 이상엽의 제Ⅱ, 제Ⅲ층의 순으로 많이 관찰되었으며 제Ⅰ층에는 거의 분포하지 않았다. 2. CCK-8양성신경원은 bipolar, bitufted, multipolar 및 비전형적인 semilunar type으로 나눌 수 있었고 bipolar type이 가장 많았다. 3. 이상엽의 이러한 CCK-8양성신경원은 전자현미경으로 관찰해 보면 대부분의 경우 함입된 핵을 가지며, 세포체 및 수상돌기에 공히 대칭형 및 비대칭형의 synapse를 가지는 것으로 보아 비원추형세포에 속하는 개재신경원으로 생각되어진다. 4. CCK-8양성신경종말은 비양성의 multipolar, semilunar 및 pyramidal cell등과 대부분 대칭형의 synapse를 형성하였고 양성의 bipolar, bitufted 및 multipolar cell등과도 대칭형의 synapse를 이루었다. 5. 대칭형의 synapse를 이루는 CCK-8양성신경종말은 적어도 이상엽의 bipolar cell에서 기시함이 관찰되었다. Based upon the results of immunohistochemical studies, high concentration of cholecystokinin octapeptide (CCK-8) immunoreactive neurons was identified in the cerebral cortex. Among the cortex, piriform cortex, which is one of the centers of the limbic system and is very different anatomically and physiologically from the neocortex, was observed to have greater accumulation of CCK-8 immunoreactive structures. In the present study, CCK-8 immunoreactive neurons in the rat piriform cortex were studied by correlated light and electron microscopy using the perosidase antiperoxidase immunocytochemical technique. The results obtained were as follows: CCK-8 immunoreactivity was localized in nueronal perikarya and processes, and CCK-8 immunoreactive neurons and axon terminals were observed in layer Ⅱ and Ⅲ of the piriform cortex. However, they were more frequent in layer Ⅱ. CCK-8 immunoreactive nuerons observed were of four types: bipolar, bitufted, multipolar and atypical semilunar cells Among them, bipolar cells were observed most frequently. Electron microscopy showed CCK-8 immunoreactive neurons to have an indented nuclei and synapses, both symmetrical and asymmetrical, on their perikarya which is additional evidence favoring the interpretation that they are non-pyramidal interneurons. The majority of axon terminals displaying CCK-8 immunoreactivity formed symmetrical synapses with non-reactive multipolar, semilunar and pyramidal cells and, less frequently, with immunoreactive bipolar, bitufted and multipolar cells. CCK-8 immunoreactive bipolar cells are thought to be the origin of some of the CCK-8 immunoreactive axon terminals which have symmetrical synapses.

정박아 및 정신분열증환자의 Dermatoglyphics 상의 특징

주강,이인환,손은익 대한해부학회 1978 Anatomy & Cell Biology Vol.11 No.2

바터 팽대부에 발생한 선암과 대세포 신경내분비암의 충돌종양 1예

주강,김태효,김차영,이상수,김홍준,김현진,정운태,이옥재 대한소화기내시경학회 2011 Clinical Endoscopy Vol.42 No.2

Most tumors affecting Vater’s ampulla are adenocarcinomas, but a neuroendocrine carcinoma in the ampulla of Vater is extremely rare. The coexistence of these two tumors has been reported in only a few cases. Here, we report a rare case of a collision tumor of the ampulla of Vater with an adenocarcinoma and a large cell neuroendocrine carcinoma. 바터 팽대부에 발생하는 악성 종양은 대부분 선암(adenocarcinoma)이며 다른 조직학적 형태의 암 발생은 극히 드물다. 특히 선암과 신경내분비암이 동시에 발생하는 복합종양은 매우 드문 것으로 알려져 있다. 저자들은 최근 상복부불쾌감과 황달을 주소로 내원한 60세 여자에서 바터 팽대부암 의심 하에 유문보존 췌십이지장절제술 후 조직학적으로 선암과 대세포 신경내분비암이 병발한 바터팽대부의 충돌종양을 진단하였다. 복합종양 중 대세포 신경내분비암이 췌장 주위 지방조직으로의 침윤 및 림프절 전이가 있어 수술 후 보조항암요법을 받았던 예를 경험하여 문헌고찰과 함께 보고한다.