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누에나방(Bombyx mori L.) 종령유충일용 전환기(轉換期)의 전흉선(前胸腺) 분필세포(分泌細胞)의 미세구조적 변화
오수자,김지현,김창환,김우갑,Oh, S.J.,Kim, J.H.,Kim, C.W.,Kim, W.K. 한국현미경학회 1982 Applied microscopy Vol.12 No.2
In order to define the morphological changes of the secreting cells of prothoracic gland during larva-pupal molt, ultrastructural observations were carried out using Bombyx mori L. as the experimental material. At first stage of present experiment, 4 day old 5th instar larva, the polyhedral secreting cells were centrally located in the prothoracic gland surrounded by the connective sheath. The secreting cells were attached to the neighboring cells by the prominent desmosomes, and the plasma membrane contacted with connective sheath were highly infolded. In cytoplasm, the most of the cell organelles, such as rod-like mitochondria, rough surfaced endoplasmic reticulum, ribosome were developed. As the stages advance from larva to pupa, general feature of the secreting cells were retained, but structural changes of the various cytoplasmic organelles-ribosome, rough surfaced endoplasmic reticulum, mitochondria, Golgi apparatus, lamellar body, and vesicle-were noted. In the perinuclear cytoplasm of the secreting cells at the stage of 6 day old 5th instar larva, it is peculiar that only a large amount of ribosomes were distributed and the other organelles were retreated from the juxtanuclear region. Just before and after spining cocoon, these features were more remarkable. Rough surfaced endoplasmic reticulum were gradually increased from the stage just before spining cocoon to the pharate pupa. Rod-like mitochondria with irregular cristae and the matrix showing low density were distributed throughout the cytoplasm in the secreting cells of the 4 day old 5th instar larva. Sometimes, longitudinally distended and curved mitochondria were observed. At the stage of pharate pupa, most of mitochondria were deformed. The rod-like mitochondria of the secreting cells of pupal prothoracic gland were narrower than those of 4 day old 5th instar larva, and the electron density of the mitochondrial matrix is increased in pupa. Golgi apparatus were a few in number in both stages, last instar larva and spining cocoon. In stages of the pharate pupa, the Golgi apparatus were frequently observed. Cytoplasmic vesicles were observed for the first time in the secreting cells of one day after spining cocoon, and the number and the size of cytoplasmic vesicles were distinctly increased inpharate pupa and just after pupation. In the secretory cells of the PG, it in concluded that the RER was closely related to syntheting the enzymes seem to produce the ecdysone.
양(羊)의 신우상피에 대한 광학 및 주사전자현미경적 연구
김진,오수자,정진웅,Kim, J.,Oh, S.J.,Chung, J.W. 한국현미경학회 1985 Applied microscopy Vol.15 No.2
This study was performed to clarify the morphological structures of the epithelia of the renal papilla, renal pelvis and ureter of the sheep (Ovis aries L.) through the light and scanning electron microscopes, Tissue specimens were taken from the renal papilla (common renal papilla and peripelvic column) and the renal pelvis (pelvis proper and pelvic pouch) of the kidney and the ureter. For the light microscopy, tissue blocks were fixed in 10 % neutral buffered formalin and embedded in paraffin wax, serially sectioned at a thickness of $6{\mu}m$. These sections were stained with hematoxylin-eosin and periodic acid-Schiff reaction. For the scanning electron microscopy, tissue blocks were prefixed in 1% glutaral-dehyde-1.5% paraformaldehyde solution and postfixed in 1% osmium tetroxide solution, dehydrated in graded alcohol, transferred to isoamyl acetate, and then dried by the critical point dryer (Polaron E 3000). These dried tissues were coated with gold and observed with a scanning electron microscope (JSM-35C), The results were as follows: The apex of the common renal papilla was lined with simple columnar epithelium having many microvilli on its luminal surface. Lateral portion of the papilla was lined with stratified epithelium $2{\sim}3$ layers thick, and its superficial cells were microvillar cells having many microvilli. The epithelium lining the peripelvic column was $1{\sim}2$ layers thick. The superficial layer was made of the microvillar cells, but a few microplica cells were appeared in the region near the pelvic pouch. The epithelium of the pelvic pouch was $1{\sim}2$ layered transitional type, and its superficial cells were microplica cells. The epithelia of the pelvis proper and ureter were $4{\sim}6$ layered transitional type, and their superficial cells were typical facet cells existing many round depressions and ridges of cell membranes of the luminal side.
YBCO SQUID 자력계를 이용한 자기심장검사장치 개발
김인선,오수호,임현균,이용호,이순걸,박용기,Kim, I.S.,Oh, S.H.,Lim, H.K.,Lee, Y.H.,Lee, S.G.,Park, Y.K. 한국초전도학회 2007 Progress in superconductivity Vol.8 No.2
YBCO do superconducting quantum interference device (SQUID) magnetometers based on bicrystal junctions have been fabricated for magnetocardiograph (MCG) measurements. We could fabricate YBCO SQUID magnetometers having magnetic field noise of about $20fT/Hz^{1/2}$ at white noise region. We have developed an MCG system employing the high performance SQUID magnetometers. The lightweight MCG system, requiring liquid nitrogen as a coolant, consists of 6-channel SQUID sensors, an adjustable patient bed with sliding motion, and data analyses software. The MCG system could record quite clear MCG signals in a room with moderate magnetic shielding. In normal operation with multi-position MCG measurements, we could obtain clear 48-point mappings of magnetic field map and current source map with high enough signal qualities far clinical trials.
집토끼 결장 각 부위의 구조에 대한 광학 및 주사전자현미경적 관찰
정진웅,천명훈,오수자,권흥식,Chung, J.W.,Chun, M.H.,Oh, S.J.,Kwun, H.S. 한국현미경학회 1984 Applied microscopy Vol.14 No.2
Structural differences in various divisions of the rabbit colon were investigated using light and scanning electron microscopy. For light microscopic study, various Portions of the colon from seven rabbits (2.5 kg body weight) were fixed in 10% neutral buffered formalin, and paraffin sections were stained with hematoxylin-eosin. Tissues for scanning electron microscopy were fixed in 1% glutaraldehyde-1.5% paraformaldehyde and postfixed in 1% $OsO_4$, dehydrated to 100% alcohol, transfered to isoamilacetate and dried by the critical point method. Subsequently, specimens were coated with gold and viewed with a JSM-35C scanning electron microscope. The colon displays a morphological diversity along its proximo-distal axis. Five regions can be discerned based on the macroscopic and microscopic characteristics. 1) The first segment immediately distal to the cecocolical junction possessing three teniae is approximately 5 cm ($4{\sim}6cm$) in length, and displays irregular folds of the mucosa oriented transversely similar to those of the cecum. 2) The second segment possessing three teniae is about 7 cm ($5{\sim}8cm$) in length, and is characterized by the papilla-like protrusions on the mucosal surface. 3) The third segment, possessing a single tenia is about 16 cm ($12{\sim}20cm$) in length, and also displays the papilla-like protrusions similar to the aforegoing segment. 4) Fusus coli, approximately 4 cm ($3{\sim}5cm$) in length, is free of teniae and exhibits longitudinal folds on the mucosal surface. These four portions together constitute the proximal colon. 5) The distal colon reaches a length of about 58 cm ($53{\sim}55cm$) and shows a pattern of surface irregularities with minor ridges on the mucosal folds.
스퍼터링 챔버에 설치한 in - situ 타원해석기의 성능평가
박광범(K. B. Park),신용환(Y. H. Shin),구교근(K. K. Koo),이순일(S. Lee),김상열(S. Y. Kim),오수기(S. G. Oh) 한국진공학회(ASCT) 1994 Applied Science and Convergence Technology Vol.3 No.2
박막이 성장하는 동안 박막성장 상태를 관찰하기 위한 in-situ 타원해석기를 제작하였다. 이 타원해석기는 He-Ne 레이저를 광원으로 사용하며 회전검광자형으로 광량측정방식을 채택하였다. 이 타원해석기는 편광자 모듈과 검광자 모듈 및 제어부로 구성되어 있으며 이들 모듈은 각각 스퍼터링 챔버에 부착되었다. c-Si 기판 위에 열산화 과정으로 성장시킨 SiO₂ 박막을 표준시료로 사용하여 보정 및 성능평가를 하였다. 또한 RF 스퍼터링으로 c-Si 기판 위에 SiO₂ 박막을 성장시키면서 타원해석상수 ψ, △을 측정하고 근사적 모델에 의한 ψ, △의 전산모의 성장곡선과 비교해 보았다. An in-situ ellipsometer has been fabricated to monitor the film growth during each stage of film growth. This is a photometric type which measures the intensity modulation vs. the rotating analyzer, and consists of the polarizer module, the analyzer module and the control part with a He-Ne laser light source. The polarizer and the analyzer modules are mounted on a sputtering chamber. The calibration procedure has been carried out using the samples with thermally grown oxide on c-Si substrate. Also the ellipsometric constants of ψ and △ were measured while the SiO₂ were sputter-grown. The data are compared to the growth curve generated by the simulation program based on the optical model of SiO₂ on c-Si.