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Park, Se Jin,Jeon, Hyo Sang,Cho, Jin Woo,Hwang, Yun Jeong,Park, Kyung Su,Shim, Hyeong Seop,Song, Jae Kyu,Cho, Yunae,Kim, Dong-Wook,Kim, Jihyun,Min, Byoung Koun American Chemical Society 2015 ACS APPLIED MATERIALS & INTERFACES Vol.7 No.49
<P>Significant enhancement of solution-processed CuInxGa1-x(Se,S)(2) (CIGSSe) thin-film solar cell performance was achieved by inducing a band gap gradient in the film thickness, which was triggered by the chalcogenization process. Specifically, after the preparation of an amorphous mixed oxide film of Cu, In, and Ga by a simple paste coating method chalcogenization under Se vapor, along with the flow of dilute H2S gas, resulted in the formation of CIGSSe films with graded composition distribution: S-rich top, In- and Se-rich middle, and Ga- and S-rich bottom. This uneven compositional distribution was confirmed to lead to a band gap gradient in the film, which may also be responsible for enhancement in the open circuit voltage and reduction in photocurrent loss, thus increasing the overall efficiency. The highest power conversion efficiency of 11.7% was achieved with J(sc) of 28.3 mA/cm(2), V-oc of 601 mV, and FF of 68.6%.</P>
동시진공증착법으로 형성한 (Ag<SUB>w</SUB>Cu<SUB>1-w</SUB>)(In<SUB>x</SUB>Ga<SUB>1-x</SUB>)Se₂ 박막 태양전지의 Ag 첨가 효과
황지선(Jiseon Hwang),조윤애(Yunae Cho),윤재호(Jae Ho Yun),어영주(Young-Joo Eo),곽지혜(Jihye Gwak),조아라(Ara Cho),박주형(Joo Hyung Park),안세진(Se Jin Ahn),유진수(Jin So Yoo),안승규(Seung Kyu Ahn),조준식(Jun Sik Cho),김기환(Kihwan Kim) 한국태양에너지학회 2020 한국태양에너지학회 학술대회논문집 Vol.2020 No.10
황세진,정호삼,유신철,이규식 한양대학교 의과대학 1991 한양의대 학술지 Vol.11 No.1
The thyroid gland is an endocrine organ which is mainly derived from endodermal cell of the primitive pharynx. It is well known that time of morphological and functional maturation of thyroid gland is so variable among the species of animal that functionl maturation of thyroid gland of the rat occurs only after birth of the animal, while the human fetal thyroid gland can secrete thyroid hormones at 10-14 weeks of gestation. In this study the author pursued the ultrastructural differentiation of thyroid follicular cells of rats in the late fetal and early postnatal lives. The fetal rats of 18th and the 20th day of gestation and rats of the 1st, the 7th, the 14th and the 21st day of postnatal life were sacrificed and thyroid glands were extracted. Rats of the 8th weeks of postnatal life were served as control group. All specimens prefixed in 2% glutaraldehyde-2.5% paraformaldehyde and postfixed in osmium tetraoxide, were dehydrated and embeded in Epon Araldite 502. Ultrathin section about 600-800 in thickness were made with LKB ultramicrotome and stained with uranyl acetate and lead citrate and lead citrate All electron microscopic preparations were observed with JEM 100cx-II electron microscope The result obtained were as follows: 1. The nucleus of the follicular cell in the rat thyroid gland was composed of euchromatin at the 18th day of gestation, some unclei with euchromatin and heterochromatin were observed at the 20th day of gestation, and all nuclei of the follicular cells were composed of euchromatin and heterochromatin after the 1st day of postnatal life. 2. Rough endoplasmic reticulum of the follicular cell in the rat thyroid gland was consisted of column shaped scant cisternae at the 18th day of gestation, and rough endoplasmic reticulum with unmerous dilated cisterne was observed at the 7th day of gestation. 3. The Golgi complex of the follicular cell in the rat thyroid gland was composed of narrow cisternae and small sized vesicles at the 18th day of gestation. Folgi complex with wide cisternae and large sized vesicles and vacuoles was observed at the 14th day of posnatal life. 4. Mitochondria of the follicular cell in the rat thyroid gland were scanty at the 18th day of gestation and number of mitochondria increased during development of thyroid gland. 5. Lysosmes of the follicular cell in the rat thyroid gland were observed from the 1st day of postnatal life. 6. Collid lumen and microvilli of the thyroid follicle were observed from the 20th day of gestation and the matured colloid lumen was observed at the 1st day of postnated life. It is consequently suggested that the thyroid follicleis are formed from the 20th day of gestation to the 1st day of postnatal life, and cytoplasmic organelles of the folliculat cell are matured morphologically between the 7th and the 14th day of postnatal life in albino rats.
Interleukin-2가 Mouse 폐장의 폐포간 중격의 미세구조에 미치는 영향
황세진,김종우,정호삼,이규식 한양대학교 의과대학 1990 한양의대 학술지 Vol.10 No.1
Interleukin-2, a kind of lymphokine which is produced by activated T-lymphocytes during an immune response, is known to act not only as a growth factor for many cells of immune system but stimulates differentiation of cells of immune system. Although interleukin-2 is a useful agent for cancer immunotherapy and inhibiting agent of tumor cell metastasis, administration of interleukin-2 to cancer patient may cause various side effects such as pulmonary edema due to capillary leakage. In this experiment the author pursued the effects of interleukin-2 on ultrastructure of interalveolar septum in lung of mouse. Healthy male mice weighing about 20gm were used as experimental animals and divided into control group and experimental group. During the experiment water and foods were given ad libitum. Animals of control group were injected 0.2 ml of distilled water and animals of experimental grouup were injected 2 million units per kg body weight of interleukin-2 intraperitoneally Experimental animals were sacrified at 3 hours, 6 hours, 12 hours, 24 hours, 48 hours and 72 hours after administration and lung specimens were obtained. All specimens, which were prefixed in 2% glutaradehyde-2.5% paraformaldehyde and postfixed in osmium tetraoxide were dehydrated and embedded in Epon Araldite 502. Ultrathinsection about 600-800 in thickness, and uranyl acetate and lead citrate double stain were performed and all electron microscopic specimens were observed with JEM 100cx-II electron microscope. The results obtained were as follows: 1. The type I pneumocyte of interalveolar septum of lungs in interleukin-2 treated mice were swollen, separated from basal lamina. 2. Capillary endothelial cell of interalveolar septum of lungs in interleukin-2 treated mice were swollen, and pinocytic vesicles in endothelial cell were enlarged and increased in number. 3. Lamellar bodies of type II pneumocytes of interalveolar septum of lungs in interleukin-2 treated mice were enlarged, and vacuolized. 4. Mitochondria and microvilli of type II pneumocytes of interalveolar septum of lungs in interleukin-2 treated mice were decreased in number. It is consequently suggested that interleukin-2 induces intracellular edema of both the type I pneumocyte and the endothelial cell and damages to type II pneumocyte of interalveolar septum of lung in mice but alveolar epithelial cells and endothelial cells are recover as time goes by.
함세운,남기석,노혜진,홍경득,황래석,방지환,신형식 대한감염학회 2007 감염과 화학요법 Vol.39 No.4
목적 : 3차 의료기관에서 입원치료를 받았던 노숙자를 대상으로 감염성 질환의 유병율을 알아보고자 하였다. 재료 및 방법 : 2002년 1월부터 2004년 8월 사이에 국립의료원에서 입원 치료를 받았던 269명의 노숙자 환자들을 대상으로 의무기록을 조사하였다. 결과 : 연구 기간동안 입원치료를 받은 총 269명의 노숙자 환자 중 남자가 249명(92.9%), 여자가 19명(7.1%)이었다. 감염질환의 유병율은 B형 간염이 228명 중 15명(6.6%), C형 간염 113명 중 8명(7.1%), 결핵은 269명중 19명(7.1%), VDRL 양성인 경우는 234명 중 25명(10.7%), 항사람면역결핍바이러스항체 양성은 130명중 2명(1.5%)이었다. B형 간염표면항원에 대한 항체 형성자는 118명(51.7%), 항체 미형성자는 95명(41.7%)이었다. 결핵으로 진단된 19명 중 객담도말 및 배양검사와 조직검사로 확인된 경우가 14명, 균음성이나 임상적으로 의심되는 경우가 5명이었다. 간질환 및 관련된 합병증으로 입원한 환자 28명 중 B형 및 C형 간염바이러스에 관련된 경우는 5명(17.9%)에불과하였고 결핵은 19명중 13명(68.4%)이 폐결핵 및 림프절종대의 증상으로 입원치료를 받았다. 복합 감염의 경우는 총 9명이었는데 후천면역결핍증후군 환자였던 2명중 1명이 결핵에 이환되어 있으면서 VDRL 양성소견을 보였고 다른 1명이 HIV와 결핵의 동시감염이었다. 결론 : 노숙자 입원환자에서 결핵, C형 간염 및 매독의 유병율이 일반 인구에 비해 높았다. 노숙자환자를 담당하는 의료인력를 보호하고 환자의 감염질환 유무를 파악하기 위해 적절한 선별검사가 필요하며 감염질환의 확산을 방지하기 위한 정부의 적극적인 대책이 필요하다. Background : Despite the expected high prevalence of several infectious diseases among the homeless, a majority of them have not received screening test and early treatment. Materials and Methods : The subjects of this study were 269 homeless patients who had been hospitalized in the National Medical Center (Korea) between January 2002 and August 2004. Their medical histories and records were reviewed to analyze the prevalence and clinical characteristics of hepatitis B and C, syphilis, tuberculosis and HIV infection among them. Results : The entire 269 homeless patients being hospitalized during the period of this study consist of 249 male patients and 19 female patients. For the prevalence of infectious diseases, HBV was seen in 15 of 228 patients (6.6%); HCV in 8 of 113 patients (7.1%); VDRL positive in 25 of 234 patients (10.7 %); HIV antibody positive in 2 of 130 (1.5%); and tuberculosis in 19 of 269 (7.1%). The number of patients who had the antibody to hepatitis B was 118 (51.7%). Of 28 patients hospitalized with the chief complaints of liver diseases and/or their complications, the number of cases infected with hepatitis B and C viruses was only 5 (17.9%). On the other hand, for patients with tuberculosis, 13 of 19 cases (68.4%) were hospitalized with the chief complaints associated with symptoms of pulmonary tuberculosis or enlarged lymph nodes. The number of patients with multiple infectious diseases was 9 in total. Conclusion : As expected, the prevalence of some infectious diseases were higher among the homeless inpatients, than non-homeless population. Proper screening tests in order to determine the presence of any infectious diseases among the patients and protect involved medical staff are necessary. Further, the government should take proactive measures to prevent the spread of infectious diseases in the aspect of public health.
일산화탄소 및 고압산소의 폭로가 흰쥐의 제2형 폐포세포와 사구체에 미치는 영향에 관한 연구
백두진,정호삼,이계훈,황세진,전영호,전영희 한양대학교 의과대학 1997 한양의대 학술지 Vol.17 No.2
The present study was performed to investigate the ultrastructural changes of the type Ⅱ pneumocyte in the lung and that of the glomerulus in the kidney after carbon monoxide(CO) or hyperbaric oxygen (HBO) exposure. The male Sprague-Dawley rats, weighing about 200gm, were used as experimental animals. The animals were divided into CO exposure group, air exposure after CO exposure group, HBO exposure group and HBO exposure after CO exposure group. After single CO and HBO exposure (3790ppm), the specimen of lung and kidney were obtained. According to routine method, EM preparations were made and observed with electron microscope. The results obtained were as follows ; 1. Slight disruption of the mitochondrial membrane was observed in alveolar type Ⅱ pneumocyte, after single CO exposure. 2. In all experimental groups except CO exposure group, decrease in number and atropy of rough endoplasmic reticulum, disruption of double membrane and crista of mitochondria and vacuolar degeneration of lamellar bodies in alveolar type Ⅱ pneumocytes were observed. 3. In all experimental groups, fusion of the pedicles of podocytes, and obliterations of the endothelial fenestrations were observed. These results suggested that CO and HBO exposure may induced the ultrastructural damages in the alveolar type Ⅱ pneumocyte and the glomerulus.