http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
풍력 블레이드 복합재의 결함 탐상을 위한 NDE 모니터링기법
임광희(K. H. Im),김우진(W. J. Kim),정예원(Y. W. Jeong),조철현(C. H. Cho),김선규(S. K. Kim),조영태(Y. T. Cho) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월
Terahertz waves (T-ray) was extensively studied for the nondestructive evaluation of characterization of various and FRP composite materials for a use of wind energy. The composite materials are being utilized on the various areas. Here, T-rays were used to perform NDE when detecting defects in the trailing edge of a wind turbine blade. This study proposed a method to measure a refractive index of a composite, using T-rays (THz) and reviewed the characteristics of the T-ray E-field of a CFRP composite. Particularly, this study produced images to determine defects in the trailing edge of a wind turbine blade and compared and analyzed the images. The TOF of T-ray penetration was measured using a T-ray through-transmission mode to find the following characteristics of the blade. The trailing edge of a nonconductive wind turbine blade could transmit T-rays, enabling the measurement of refractive indices in a through-transmission mode. The effectiveness and limitations of T-ray for the NDE of composites are discussed.
정지택(J. T. Jeong),최영석(Y. S. Choi),이진규(J. K. Lee),최정석(J. S. Choi),정영철(Y. C. Jung),정종현(J. H. Jung),최양일(Y. I. Choi) 충북대학교 동물생명과학연구소 2016 동물생명과학연구 Vol.8 No.-
This study was conducted to compare the quality characteristics of pork loin from crossbred combination in pigs. The crossbred combination were Y×Y, YL×Y, YL×D and YL×L(L:Landrace, Y:Yorkshire, D:Duroc). In the proximate composition, the moisture content of YL×D was higher compared with the other crossbred combination. The fat content of YL×Y was significantly higher compared with the other crossbred combination(p<0.05). There ware no significantly difference in share force, WHC, dip loss and cooking loss. The lightness (L<SUP>*</SUP>) value of YL×Y was significantly higher compare with the other crossbred combination(p<0.05). The redness (a<SUP>*</SUP>) values of Y×Y was higher compared with the other crossbred combination. In sensory characteristics, the juiciness, tenderness, flavor and overall acceptability of YL×D were higher compared with the other crossbred combination. As results, it is considered that this information about crossbred combination pigs would be used as a basic data for improvement of pork quality.
c-Cbl-Mediated Neddylation Antagonizes Ubiquitination and Degradation of the TGF-β Type II Receptor
Zuo, W.,Huang, F.,Chiang, Y.,Li, M.,Du, J.,Ding, Y.,Zhang, T.,Lee, H.,Jeong, L.,Chen, Y.,Deng, H.,Feng, X.H.,Luo, S.,Gao, C.,Chen, Y.G. Cell Press 2013 Molecular cell Vol.49 No.3
Transforming growth factor β (TGF-β) is a potent antiproliferative factor in multiple types of cells. Deregulation of TGF-β signaling is associated with the development of many cancers, including leukemia, though the molecular mechanisms are largely unclear. Here, we show that Casitas B-lineage lymphoma (c-Cbl), a known proto-oncogene encoding an ubiquitin E3 ligase, promotes TGF-β signaling by neddylating and stabilizing the type II receptor (TβRII). Knockout of c-Cbl decreases the TβRII protein level and desensitizes hematopoietic stem or progenitor cells to TGF-β stimulation, while c-Cbl overexpression stabilizes TβRII and sensitizes leukemia cells to TGF-β. c-Cbl conjugates neural precursor cell-expressed, developmentally downregulated 8 (NEDD8), a ubiquitin-like protein, to TβRII at Lys556 and Lys567. Neddylation of TβRII promotes its endocytosis to EEA1-positive early endosomes while preventing its endocytosis to caveolin-positive compartments, therefore inhibiting TβRII ubiquitination and degradation. We have also identified a neddylation-activity-defective c-Cbl mutation from leukemia patients, implying a link between aberrant TβRII neddylation and leukemia development.
한우 사골, 꼬리, 우족 및 잡뼈 추출물의 이화학적 특성
이진규(J. K. Lee),정지택(J. T. Jeong),최정석(J. S. Choi1),정명옥(M. O. Jung),최양일(Y. I. Choi) 충북대학교 동물생명과학연구소 2017 동물생명과학연구 Vol.9 No.-
This study was conducted to investigate the physico-chemical characteristics of various bone extracts in Hanwoo cattle. The experimental materials are as follows; T1(Shank bone extract), T2(Tail extract), T3(Beef feet extract), and T4(The other bones extract). In the proximate composition, the T1 and T2 showed higher moisture and fat contents than those of T3 and T4(p<0.05), and the T3 had the highest protein content among the bone extracts(p<0.05). The quality properties including salinity, sugar content, turbidity and yellowness(b*) values were significantly higher in the T3 than the other bone extracts(p<0.05). However, the pH value of T3 was significantly lower than the other bone extracts. In the mineral contents, calcium contents of bone extracts were 36.33-48.57mg/kg, and the content of phosphorus was the lowest in T1(4.62mg/kg) and T2(19.88mg/kg) was the highest(p<0.05). Contents of sodium and potassium were the highest in T3(215.83mg/kg) and T2(54.59mg/kg), while the content of magnesium was the lowest in T3(12.28mg/kg). In conclusion, these results could be suggested to be the basis information for processed meat extract products industry in korea using Hanwoo bone extract.
이진규(J. K. Lee),최영석(Y. S. Choi),정지택(J. T. Jeong),최정석(J. S. Choi),최양일(Y. I. Choi) 충북대학교 동물생명과학연구소 2016 동물생명과학연구 Vol.8 No.-
본 연구는 갈비추출액을 제조할 때 적절한 추출시간을 알아보기 위하여 진행하였으며, 추출시간은 1시간, 6시간, 10시간, 24시간, 48시간으로 하였다. 갈비추출액은 추출시간이 증가할수록 수분은 감소하였고, 단백질과 회분은 증가하는 경향을 나타내었다. 또한 갈비추출액은 염도, 당도 및 색차값과 같은 품질특성에서도 추출시간이 증가할수록 증가하는 경향을 나타내었다. 관능평가에서 갈비추출액의 맛과 전체기호도가 추출 10시간부터 높은 수준을 나타내는 것으로 보아 한우갈비 추출액은 10시간 이상 가열이 품질에 우수한 것으로 판단된다. This study was carried out to determine proper extraction time of rib bone extract in Hanwoo. Experimental design was devided into 5 treatments (T1: 1h, T2: 6h, T3: 10h, T4: 24h and T5: 48h). As the extraction time increased, the moisture content was reduced whereas the protein, fat, and ash were increased (p<0.05). Also, quality characteristics including salinity, sugar content, and color were improved by the extraction time increase. In the sensory characteristics, T4 and T5 showed higher all sensory scores than T1, T2 and T3. Therefore, the extraction time of Hanwoo rib bone is appropriate for more than 10 hours.
국내 유통중인 기계발골계육의 품질특성 및 저장특성 비교
이주호(J. H. Lee),최정석(J. S. Choi),김중헌(J. H. Kim),엄태영(T. Y. Eum),김윤희(Y.H. Kim),정준영(J. Y. Jeong),최양일(Y. I. Choi) 충북대학교 동물생명과학연구소 2012 동물생명과학연구 Vol.4 No.-
This study was undertaken to compare the quality characteristics and storage characteristics between mechanically deboned chicken meat (MDCM) in 5 different companies(T1-T5) in Korean. In the chemical composition, T2 showed higher(p<0.05) moisture, T4 showed higher protein(p<0.05), T3 showed higher fat(p<0.05) and T5 showed higher ash(p<0.05). In the pH value, T5 showed lower(p<0.05) pH value than the other raw meat. In the TBA value, T3 showed lower(p<0.05) value than other products from 0 day to 7 day of storage. In the total microbial count, T3 showed lower(p<0.05) value compared to other raw meat from 0 day. But T1 showed lower(p<0.05) from 7 day. In the VBN value, T5 showed higher(p<0.05) from 0 day. And all raw meats showed higher than standard value from 7 day. As a result, MDCM showed difference the quality and storage characteristics the between companies in Korea. It is impossible to store MDCM more than 7 days when stored at 4℃ refrigerator.
정태수,김현숙,유평렬,신영진,신현길,김택성,정철훈,이훈,신영신,강신국,정경수,홍광준 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.16 No.-
수직 2단 전기로를 제작하고 결정성장관에 꼬리관을 연결하여 seed 결정 없이 승화 방법으로 CdS 결정을 성장하였다. 이때 시료부분과 성장부분의 온도차 ΔT가 이론적인 값 14.7℃와 비교해서 실험적으로 얻은 값이 15℃로 아주 일치하는 값을 나타내었다. 이때 꼬리관의 온도를 110℃로 시간당 0.38mm 정도로 빨리 결정성장관을 끌어 올려 결정을 성장하였다. 분말법의 X-선 회절무늬와 Laue 배면 반사법의 Laue 무늬로 부터 성장된 결정이 육방정이고 결정성장관의 길이 방향으로 c축을 갖는 단결정임을 확인하였다. 또한 CdS 단결정은 상온에서 전자 이동도와 운반자 밀도는 각각 316㎠/V·sec와 2.90× 10 exp (16)cm^-3 정도이였다. We has made 2-zone vertical electric furnace and has been grown CdS single crystal by sublimation method in crystal growth tube with tail tube without seed crystal for growth. While it has been growing, temperature difference ΔT of source and growth part has nearly agreed with theoritical value 14.7℃ and experimental value 15℃. Then, crystal of best quality has been grown, when temperature of tail tube has been 110℃, in spite of quickly pulling up crystal growth tube a degree 0.38mm per hour. The grown crystal have had hexagonal structure and single crystal with c-axis to length of crystal growth tube from X-ray diffraction pattern of powder method and Laue pattern of back reflection Laue method. Also, the mobility and carrier density from Hall effect measurement have been 316㎠/V·sec and 2.90× 10 exp (16)cm^-3 at the room temperature, respectively.
정태수,유평열,신영진,신현길,김택성,정철훈,이훈,신영신,홍광준,유기수 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.16 No.-
승화방법으로 광전도체의 CdS 단결정을 성장하였고 외삽법으로 구한 a_o와 c_o 의 격자상수 값은 각각 4.1318Å과 6.7122Å임을 알았다. Hall 측정값으로 부터 상온에서의 CdS 단결정의 운반자 농도와 이동도는 각각∼10^23m^-3과 2.93×10 exp (-2)㎡/V sec 이였으며 온도에 따른 이동도 변화는 33 K에서 150 K까지는 T^1/2 에 따라 증가하는 경향이 있고 180 K 에서 상온까지는 T^-2에 따라 감소한 경향이 나타났다. 광전류 측정으로 부터 나타난 단파장대의 봉우리는 진성전이에 기인하는 봉우리였으며 이 봉우리의 에너지값은 CdS 광전도체에 에너지 밴드 갭과 동일한 값을 나타냄을 알았다. A CdS single crystal was grown by using sublimation method. Lattice constants, a_o and c_o , obtained by using extrapolation were 4.1318 Å and 6.7122 Å, respectively. The carrier density was∼10^23m^-3 and the mobility was 2.93×10 exp (-2)㎡/V-sec from measured Hall data at room temperature. The mobility has a increasing tendency in proportion to T^1/2 from 33 K to 150 K and a decreasing tendency in proportion to T^-2 from 180 K to room temperature. The short wavelength band peak measured from photocurrent was due to intrinsic transition, and the energy value of this peak was equal to the energy band gap of CdS photoconductor.