Synthesis and electronic transport properties of Sn-filled/Tedoped CoSb3

정재용,박관호,김일호 한양대학교 세라믹연구소 2010 Journal of Ceramic Processing Research Vol.11 No.5

Sn-filled/Te-doped CoSb3 skutterudites (SnzCo4Sb11.2Te0.8) were prepared by encapsulated induction melting, and their electronic transport properties were investigated. A single δ-phase was obtained successfully by a subsequent isothermal heat treatment at 773 K for 5 days. The Seebeck coefficient and Hall coefficient confirmed that all the samples exhibited n-type conductivity. Te atoms acted as electron donors by substituting for Sb atoms. The temperature dependence of the electrical resistivity suggested that SnzCo4Sb11.2Te0.8 is a highly degenerate semiconducting material. The lattice contribution was found to be dominant over the thermal conductivity of SnzCo4Sb11.2Te0.8.

집단 검사기관에서의 흉부 간접촬영에 관한 실태 비교(병무청 위주로)

정재용,유승혁,노정백,이재덕 대한방사선사협회 2002 대한방사선사협회지 Vol.28 No.1

다발성 골수종으로 이행한 단일형질세포종 1예

정재용,모성환,기장도,문철호,김창욱,전용준,박유환,정춘해,오윤경 조선의대 1995 The Medical Journal of Chosun University Vol.20 No.2

Synthesis of Thermoelectric Mg2Si by Mechanical Alloying

정재용,최순목,서원선,김선욱,김일호 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.41

Mechanical alloying was employed as a solid state reaction to synthesize Mg2Si compound. The silicide transformation was analyzed by using X-ray diffraction. The electronic transport properties (Hall coefficient, carrier concentration and mobility) and the thermoelectric properties (Seebeck coefficient, electrical conductivity, thermal conductivity and figure of merit) were examined. Mg2Si was successfully synthesized by mechanical alloying for 24 h and was fully consolidated by hot pressing at 1073 K for 2 h. Intrinsic Mg2Si showed n-type conduction, indicating that the electrical conduction was mainly due to electrons. The absolute value of the Seebeck coefficient decreased and the electrical conductivity increased with increasing temperature due to intrinsic conduction at high temperatures. The thermal conductivity decreased with increasing temperature, and the lattice contribution was dominant. The thermoelectric figure-of-merit of intrinsic Mg2Si was low,and it should be improved by doping.

목포항의 해상교통시스템 설정에 관한 연구

정재용,김철승,박성현,Jong Jae-Yong,Kim Chol-Seong,Park Sung-Hyeon 해양환경안전학회 2005 해양환경안전학회지 Vol.11 No.2

In the present maritime traffic conditions of Mokpo harbor, there exist many hazardous factors which may lead to huge accidents including marine oil pollution We analyze marine traffic environments including traffic congestion, natural conditions, maritime traffic accidents in the last 10 years, the fishery status, operation of traffic routes and management of navigational aids and regulations relating ships' routeing both in and out of the country. Consequently, this work is to propose improved marine traffic system in future.

Anti-SARS-CoV-2 Nucleoprotein Antibodies Derived from Pig Serum with a Controlled Specificity

정재용,봉지홍,김홍래,박준희,이창규,강민정,김현옥,변재철 한국바이오칩학회 2021 BioChip Journal Vol.15 No.2

Antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleoprotein (NP) were purified from pig serum through two steps: (1) isolation of anti-NP IgG antibodies using magnetic beads with immobilized human SARS CoV-2 NP and (2) fi ltration of anti-spike protein (SP) IgG antibodies using magnetic beads with immobilized human SARS-CoV SP. The enhanced specificity of the purified antibodies to the NP of SARS-CoV-2 was demonstrated using an immunoassay with anti-NP IgG antibodies after the isolation and filtration steps. The binding constants ( K d ) of the purified anti-NP IgG antibodies to the NP of SARS-CoV-2 and the SP of SARS-CoV were estimated using a surface plasmon resonance biosensor (SPR). A competitive assay using the two-step purified anti-NP IgG antibodies from pig serum demonstrated (a) the detection of SARS-CoV-2 in viral fluid and (b) the discrimination of SARS-CoV-2 from SARS-CoV, MERS-CoV, and CoV strain 229E in viral fluids.

해상교통안전진단 대상사업 변경에 대한 고찰-3

정재용 해양환경안전학회 2015 해양환경안전학회 학술발표대회 논문집 Vol.2015 No.11

Sternheimer-Malbin染色法과 擴散沈澱法에 依한 尿沈渣의 細胞鑑別

鄭在龍,金在植 慶北大學校 醫科大學 1973 慶北醫大誌 Vol.14 No.2

新鮮한 正常所見尿 및 病的所見尿를 採取한 후 遠沈法 및 擴散沈澱法을 利用하여 各各의 沈澱物을 無染色標本, SM染色 및 沈澱 Wright氏 染色을 施行하여 細胞數 計算, 形態學的鑑別 및 glitter cell의 檢索과 아울러 正常血液中 白血球의 0.2%低張 食鹽溶液에 依한 glitter cell樣 變化를 觀察하였던바 다음과 같은 몇가지 結論을 얻었다. 1. 遠沈法에 依한 尿沈渣의 無染色標本으로 白血球 赤血球 上皮細胞 및 圓柱細胞(cast)등의 鑑別은 大體로 良好하였다. 2. 遠沈法에 依한 尿沈渣의 SM染色標本은 細胞鑑別에는 도움이 되나 決定的인 方法은 아니대 glitter cell檢査에는 唯一한 方法이었다. 3. 遠沈法에 依하여 細胞等의 變形 重積 및 破懷等을 招來할 수 있을 것으로 看做하였다. 4. 濾細擴散沈澱法에 依한 尿沈澱을 乾燥시켜 Wright氏 染色을 實施하므로서 細胞의 鑑別에 있어 遠沈法에 依한 日常檢尿의 缺點을 補完 矯正 할 수있었다. 5. Glitter cell은 4例의 腎盂腎炎 全例에서 陽性이었고 1例의 姙娠中毒症(下位尿路 感染症)에서 陽性이었다. 6. 血液의 白血球에 低張食鹽用(0.2% NaCl) 液을 加하여 SM染色을 實施해 본 結果 glitter cell樣 變化를 볼 수 있었다. There has been various staining attempts to differentiate the cellular components of the urinary sediment and to preserve the cellular morphology by diffusion sedimentation technique. However the most laboratiories are negligible to perform the differential stains for the urinary sediments in the routine cases. The authers examined normal and pathological urinary sediments with Sternheimer-Malbin stain and the sedimentation technique. The results were somewhat encouraging us to continue these combining tests whenever they will be indicated in the laboratory works. Sternheimer-Malbin stain was useful to the aspect of the differentitation of the ordinary cells, especially to detect the glitter cell which was once considered to be a pathognominic ceel in pyelmonephritis. All of the cases of pyelonephritis revealsed revealed glitter cells in this investigation. Contrast to the centrifugation techinque which tends to induce some cellular damage and the overlapping of cells, the filter paper diffusion technique revealed the great advantages in preserving the celluar characters of morphology and preventing the overlapping of cells. The hypotonic saline (0.2%)induced the glitter cell like changes in 5 cases of normal blood leucocytes taken from the buffy coats after centrifugation in the wintroble tube.

진도 연안VTS의 성과 분석 및 기능에 관한 실증적 연구

정재용,정초영,Jeong, Jae-Yong,Jung, Cho-Young 해양환경안전학회 2012 해양환경안전학회지 Vol.18 No.4

Hebei Spirit Oil Spill that happened in 2007 had prompted the need of revisiting the coastal safety. In response to this, Korea had made an effort to implement VTS in every coastline in the country. There are a lot of theoretical studies on VTS function nowadays, but coastal VTS are less frequently studied. In this paper, performance analysis results and accident prevention activities of Jindo Coastal VTS center were summarized and the Coastal VTS function are investigated. Jindo Coastal VTS covers relatively wide area and various places with various maritime traffic characteristics are the major navigation vessels, which means that it is important to control these vessels. Since the probability of accidents due to human error is relatively high in coastal area due to negligence tendency of crews during coastal area navigation, coastal VTS has to provide sufficient assistance to navigating vessels. Like most harbour VTS, Coastal VTS provides not only main information service, navigational assistance and traffic organization services but also various services related with advanced search-and-rescue assistance, marine national security, maritime crime prevention, oil spill response, traffic services for non-service vessel, and safety supervision for water leisure boats.

Synthesis and Thermoelectric Properties of Sn_zCo_(3.7)Ni_(0.3)Sb_(12) Skutterudites

정재용,박관호,김일호 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.58 No.51

Sn_zCo_(3.7)N_(0.3)Sb_(12) skutterudites were synthesized by induction melting followed by annealing at 823 K for 120 h in a vacuum. The effects of Sn filling on the transport and the thermoelectric properties were examined at temperatures from 300 K to 700 K. The Seebeck coefficient and Hall coefficient revealed a change in electrical conduction type from n-type to p-type when the filling fraction (z) was higher than 0.4. The temperature dependence of the electrical resistivity suggests that Sn_zCo_(3.7)Ni_(0.3)Sb_(12) is a highly degenerate semiconducting material. The electrical resistivity increased with increasing Sn content, which is related to the bipolar thermoelectric effect. The thermal conductivity was reduced by Sn filling, with Sn_(0.2)Co_(3.7)Ni_(0.3)Sb_(12) showing the lowest value.