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야생등줄쥐(Apodemus agrarius) 후각망울의 neuropeptide Y 면역반응세포의 분포
정영길,김길수,정주영,이남섭,이경렬,김무강,Jeong, Young-gil,Kim, Kil-soo,Jung, Ju-young,Lee, Nam-seob,Lee, Kyeng-youl,Kim, Moo-kang 대한수의학회 1999 大韓獸醫學會誌 Vol.39 No.3
This study was carried out to investigate the NPY-immunohistochemical characteristics of the olfactory bulb in the striped field mouse(Apodemus agrarius). The animals were anesthesized with thiopental sodium and perfused with 4% paraformaldehyde through left ventricle and aorta. Brains were removed and tranfered 10%, 20% and 30% sucrose. Sections were then cut on a cryostat into $40{\mu}m$-thick. The tissue immunostained with avidin-biotinylated complex method. The main olfactory bulb consisted of seven circumferential laminae : an olfactory nerve fiber layer, a glomerular layer with glomeruli surrounding by periglomerular cells, an external plexiform layer having granule and tufted cells, a mitral cell layer, a narrow internal plexiform layer, a granule cell layer forming several cell rows and a layer of white matter. The accessory olfactory bulb had four layers : an olfactory or vomeronasal nerve fiber layer, a glomerular layer consisting of small glomeruli, a mixed layer not distinguishing the external plexiform/mitral cell/granule cell layers and a granule cell layer. Most of NPY-immunoreactive(NPY-IR) neurons in main olfactory bulb were localized in the deeper portion of granule cell layer, white matter and anterior olfactory nucleus. In addition, some NPY-IR neurons were identified in the external plexiform layer. The shape of NPY-IR neurons of all olfactory bulb were predominant round or oval, sometime multipolar in shape. And most NPY-IR processes were parallel to long axis of white matter. In accessory olfactory bulb, NPY-IR neurons were not found in all region.
CaO가 첨가된 Mg-Al-Si 합금의 미세조직 및 크리프 거동
정영길 ( Young Gil Jung ),양원석 ( Wonseok Yang ),김세광 ( Shae K Kim ),임현규 ( Hyunkyu Lim ),김도향 ( Do Hyang Kim ) 대한금속재료학회(구 대한금속학회) 2014 대한금속·재료학회지 Vol.52 No.10
For automotive parts used at elevated temperatures, such as transmission cases and engine blocks, it is necessary to improve the creep resistance of magnesium alloys. For this reason, various magnesium alloys have been developed for elevated temperature applications. In this study, the microstructure and creep behavior of CaO added Mg-Al-Si alloys (Mg-5.0Al-0.7Si, Mg-5.0Al-0.7Si-0.5CaO, Mg-5.0Al-0.7Si- 0.5CaO-0.3Sr) were investigated. The microstructures were observed by OM, SEM and TEM. To evaluate the mechanical properties, tensile tests were carried out at room and high temperature, and creep tests were performed at 150 ℃ with applied loads from 50 to 80 MPa.
조직배양에 의한 무지개송어 장기조직세포의 염색체 기본구조에 관한 연구
정영래,정영길,손진기,김무강,Jung, Yung-rae,Jeong, Young-gil,Son, Jin-ki,Kim, Moo-kang 대한수의학회 1995 大韓獸醫學會誌 Vol.35 No.2
This study was examined chromosome structure of kidney, fin, blood cell, sexual organ that were differently examined chromosome of a good cell activity from organ, medium, staining methods, instruments with rainbow trout 100. And so we obtained following conclusion. 1. The difference from each organ and medium is that a good cell activity of fin, kidney, sexual organ were obtained in TC-199 medium and a good cell activity in TC-199 medium+PHA(5%). 2. In the difference by staining methods, G-banding and C-banding were analyzed by electron microscope or cytoscan. Among them, heterochromatin of centromere analyzed by C-banding. 3. The zygotene and the leptotene were analyzed in this study. 4. Karyotype, heterochromatin and each stage of cell division were clearly analyzed by cytoscan.
CaO를 첨가한 ZM21 합금의 기계적 특성 및 생체 부식 특성 평가
양원석 ( Won Seok Yang ),정영길 ( Young Gil Jung ),김세광 ( Shae K Kim ),임현규 ( Hyun Kyu Lim ),김도향 ( Do Hyang Kim ) 대한금속재료학회(구 대한금속학회) 2014 대한금속·재료학회지 Vol.52 No.11
Mg alloys with unique characteristics, such as high specific strength, low density, high corrosion rate, and so on, are regarded as functional and also structural materials. In particular, Mg alloys have attractive points as metal implants due to their good biocompatibility and biodegradability in the bio- environment and similar elastic modulus to that of bone tissue. The purpose of this work was to investigate the mechanical properties and bio-corrosion properties of extruded Mg-2Zn-1Mn-xCaO (x = 0.5, 1.0, and 1.5) alloys. To evaluate the bio-corrosion properties, electrochemical tests were conducted in Hanks` solution at 37 ℃. The results of tensile and in vitro corrosion tests indicated that the mechanical and biodegradable properties of Mg-2Zn-1Mn-xCaO alloys could be adjusted by controlling the CaO content. (Received September 24, 2013)
박일권,이경열,송치원,권효정,박미선,이미영,정영길,이철호,하권수,이강이,김무강,Park, Il-Kwon,Lee, Kyoug-Youl,Song, Chi-Won,Kwon, Hyo-Jung,Park, Mi-Sun,Lee, Mi-Young,Jeong, Young-Gil,Lee, Chul-Ho,Ha, Kwon-Soo,Lee, Kang-Yi,Kim, Moo-Kang The Korean Society of Veterinary Science 2002 大韓獸醫學會誌 Vol.42 No.2
중추신경계는 신경원(neuron)과 이를 지지해주는 신경아교세포(neuroglia)로 이루어져 있다. 발생과정중 신경원의 발달은 NGF(neruv growht factor)에 의해 관찰이 가능하고, 아교세포들중 별모양아교세포는 GFAP(Glial fibrillary acidic protein)항체로 밝혀낼 수 있다. CNTF(Cillary neurotrophic factor)는 이전에는 운동신경원의 발생 및 유지에 있어 중요한 역할을 하는 인자로 알려져 왔으며, 최근에는 발생과정 중 NGF와 GFAP의 역할에 도움을 주는 것으로 알려졌다. 본 연구에서는 이러한 NGF, GFAP, CNTF를 발생과정 중(임신 15,17,19,21일, 출생 1,2,3,일, 1,2,3주)의 몽골리안 저빌의 전뇌에서 시간에 따른 분포를 광학현미경, 형광염색을 통한 공초점현미경 및 전자현미경을 통해 알아보고자 하였다. 전뇌에서 NGF는 발생 19일령에서부터 대뇌피질에서 관찰되기 시작해서 후각망울, 해마체 및 diagonal band에 관찰되었고, 출생 3일령에서 가장 강한 염색성을 보였으며 그 반응은 출생 3주까지도 관찰되었다. GFAP는 출생17일령에서 뇌실로부터 아교세포가 관찰되는 형태가 보였으며, 외측뇌실과 제3뇌실에서부터 피질로 이동하는 형태로 관찰되었다. 또한 후각망울의 과립층, 대뇌피질 및 해마체에서 관찰되었으며, 출생 2일령에서 가장 강한 반응을 나타내었다. CNTF는 신경원과 신경아교세포에서 관찰되었으며, NGF와 GFAP와는 달리 출생 전에서는 관찰되지 않다가 출생 1일령부터 후각망울 및 대뇌피질에서 약하게 관찰되기 시작되었으며, 이러한 반응은 출생 2주령에서 잘 관찰되었다. 전자현미경상에서는 신경원과 신경아교세포에서 특징적인 구조는 관찰되지 않았으나, 각각의 항체에 대한 반응이 나타난 세포에서는 사립체와 형질내세망과 같은 세포소기관들이 많이 관찰되었다. 이러한 Mongolian gerbil 전뇌에서의 NGF, GFAP 및 CNTF의 분포는 비슷한 임신일령의 설치류와 거의 유사하게 관찰되었으며, 배아과정 및 출생 후 발달에 따른 전뇌에서의 신경원과 신경아교세포에서의 분포를 볼 수 있었다. The immunohistochemical localization of the nerve growth factor (NGF), glial fibrillary acidic protein (GFAP) and ciliary neurotrophic factor (CNIF) in the developing Mongolian gerbil forebrain was investigated by the immunohistochemical and electron microscopy methods. Generally, the NGF specifically recognizes the neurons, the GFAP does the glia, and the CNIF does the motor neurons. This study demonstrates the location of the NGF, GFAP and CNTF in the developing Mongolian gerbil from the embryonic days 17 (E17) to the postnatal weeks 3 (PNW 3). The NGF was localized at E19 in the olfactocy bulb and the cerebral cortex, expanded to the hippocampus, and the diagonal bond from the late prenatal period to PNW 3. GFAP was observed in the lateral ventricle and the third ventricle at E17, projected into the cerebral cortex at E19. The GFAP was observed to have the largest numbers in several parts of the forebrain at the postnatal days 2 (PND2), while the most numerous CNTF was observed at PNW 2. The CNTF-IR cells were observed only in the postnatal days and were found in the olfactory bulb, cerebral cortex both neuron and neuroglia at PND3. Electron microscopy showed that the NGF, GFAP and CNTF were not related to any connections with any particular subcellular structure. These results suggest that NGF, GFAP and CNTF be related to the neuron and neuroglia at the prenatal and postnatal stages in the developing Mongolian gerbil.
박일권,송치원,이경열,권효정,김무강,이강이,정영길,이남섭,하권수,Park, Il-kwon,Song, Chi-won,Lee, Kyung-youl,Kwon, Hyo-jung,Kim, Moo-kang,Lee, Kang-iee,Jeong, Young-gil,Lee, Nam-seob,Ha, Kwon-soo 대한수의학회 2000 大韓獸醫學會誌 Vol.40 No.3
The locus coeruleus(LG) is known to be observed a sexual dimorphism in rat CNS. LC is the largest collections of norepinephrine(NE)-containing neurons in the mammalian brain. Especially in rat, all LC neurons contained NE unlike other mammalians, so that specific reactions were found in the tyrosine-hydroxylase(TH) immunoreactive neurons. Sexual dimorphism of rat LC has affected by genes before sex hormone appeared, thereafter affected by sex hormones. In these day, many scientists founded morphological differences between male and female LC morphology, but differences of entire structure was not founded. Thus we investigated sex differences of the LC neuron's morphology in rat by three-dimensional(3-D) reconstruction using Confocal laser scanning microscopy(CLSM). We reported that neuron's shape was relatively-large multipolar neurons and neuron's processes in dorsal LC proceeded to ventral direction in the male and female rat. Male had a longer anterior-posterior length than female had in dorsal LC. In addition to middle-LC, male rat's LC had a more thicker posterior region but had not viewed in a previous study. In reverse, female rat's LC had a thicker anterior region like a previous study. This results using 3-D reconstruction by CLSM showed that the male's LC was more wide-ranging than female's relatively.