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Kyu-shik Jeong,정원일,Jae-yong Chung,Mi-young An,Chae-yong Jung,Gyoung-jae Lee,Jong-soo Kang,Byeong-cheol Kang,Young-heun Jee,Bruce H Williams,Young-oh Kwon,Da-hee Jeong 대한수의학회 2003 Journal of Veterinary Science Vol.4 No.2
Cirrhosis Occurring in a Young Woodchuck (Marmota monax) Due to Vertical Transmission of Woodchuck Hepatitis Virus (WHV)Da-hee Jeong, Won-il Jeong, Jae-yong Chung, Mi-young An, Chae-yong Jung, Gyoung-jae Lee1, Jong-soo Kang1, Byeong-cheol Kang2, Young-heun Jee3, Bruce H Williams4, Young-oh Kwon5 and Kyu-shik Jeong*College of Veterinary Medicine, Kyungpook National University, Daegu 702-701, Korea1Shinwon Scientific Co., LTD, Research Institute, Suwon, Korea2Clinical Research Institute, Seoul National University, Seoul 110-744, Korea3College of Veterinary Medicine, Jeju National University, Jeju 690-756, Korea
Kang, Da-Young,Lee, Wooju,Kim, Dongchoul,Moon, Jun Hyuk American Chemical Society 2016 Langmuir Vol.32 No.33
<P>The pentamode structure is a type of mechanical metamaterial that displays dramatically different bulk and shear modulus responses. In this study, a face-centered cubic (FCC) polymeric microstructure was fabricated by using SU8 negative type photoresists and multibeam interference exposure. Isotropic plasma etching is used to control the solid-volume fraction; for the first time, we obtained a structure with the minimum solid-volume fraction as low as 15% that still exhibited high structural integrity. Using this method, we reduced the width of atom-to-atom connections by up to 40 nm. We characterize the effect of the connection area on the anisotropy of the mechanical properties using simulations. Nanoindentation measurements were also conducted to evaluate the energy dissipation by varying the connection area. The Young's/shear modulus ratio is 5 times higher for the etched microstructure than that of the bulk SU8 materials. The use of interference lithography may enable the properties of microscale materials to be engineered for various applications, such as MEMS.</P>
건조 재료를 사용한 콘크리트의 포장화에 관한 실험적 연구
한다희,박희곤,백민수,김성식,이영도,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
Most concrete is recently made of an aggregate which is properly absorbed, and earned in it in order to do capability at every fields. We have been close to demand new capability of high flowing and enduring for specific concretes. That is difficult to cope with claiming the efficiency on deterioration from lack of a high quality aggregate. Therefore, For solving the problems we apply to a packing method for using dried materials. That is to say it is a kind of making into an instant. In this study, There is a purpose to present fundamental data, comparing and analyzing a phenomenon about aggregate's absorption following the rate of adding water, for using existing materials.
분말혼화제를 사용한 콘크리트 포장(包裝)화에 관한 기초적 연구
한다희,김영주,박무영,박희곤,이영도,정상진 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)
Most concrete is recently made of an aggregate which is properly absorbed, and carried in it according to its capability at every fields. We have been close to demand new capability of high flowing and enduring for specific concretes. That is difficult to cope with claiming the efficiency on deterioration from lack of a high quality aggregate. Therefore, For solving the problems we apply to method of packaged dry combined materials for concrete using dried materials. That is to say that it is a kind of making into an instant. In this study, There is a purpose to present fundamental data, comparing and analyzing a phenomenon of aggregate's absorption following the rate of adding water, for using existing materials.
재료의 흡수상태에 따른 콘크리트의 물리적 변화에 관한 기초적 연구
한다희,황병준,박희곤,이영도,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
Most concrete is recently made of an aggregate which is properly absorbed, and carried in it in order to do capability at every fields. We have been close to demand new capability of high flowing and enduring for specific concretes. That is difficult to cope with claiming the efficiency on deterioration from lack of a high quality aggregate. Therefore, For solving the problems we apply to a packing method for using dried materials. That is to say it is a kind of making into an instant. In this study, There is a purpose to present fundamental data, comparing and analyzing a phenomenon about aggregate's absorption following the rate of adding water, for using existing materials.
Contact electrification behaviors of micro-patterned polydimethylsiloxane
Jin Da Woon,Lee Dong Woo,Ko Young Joon,Jung Jong Hoon 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.1
We have investigated the contact electrification mechanism of identical materials using micro-patterned polydimethylsiloxane (PDMS) polymers. Commercially available sandpapers with various grit sizes were used for systematic control of the micro-patterns. Microstructure and hardness measurements revealed that the micro-patterns of sandpaper were successfully transferred to PDMS without significant change of the Young’s modulus. Clear triboelectric outputs were observed when contact separation was performed for identical PDMS polymers. The triboelectric outputs were significant when the microstructure was different, while the outputs were small when the microstructure was similar. These results were explained by the bond-breaking and ion/material transfer due to the roughness-induced temperature differences in identical PDMS polymers.
八味元이 Streptozotocin 糖尿病에 미치는 影響
김희경,문정숙,박귀영,이다미,이은영,장윤경,황미경 曉星女子大學校 藥學大學 學生會 1988 曉星藥誌 Vol.4 No.-
Streptozotocin was injected to rats and rabbits to induce the experimental diabetes mellitus and Palmiwon was administrated to observe the changes of blood sugar, body weight, and serum Zn, Ca, Mg level in order to find out the effect of diabetic tratment by experimental method. And thus, the result was as follows: 1. The blood sugar level of diabetic rat was decreased after administration of Palmiwon. 2. Body weight of diabetic rat was moderately decreased after administratin of Palmiwon. 3. The less streptozotocin, 30 mg/kg, don't easily induce diabetes mellitus in rabbits. We did not find the changes of blood sugar, serum Zn, Ca, Mg level in the rabbits injected by streptozotocin, 30mg/kg of body weight.
사무직 근로자의 수면의 질 및 직무스트레스와 우울과의 관련성
강미나,강수영,권수정,김현주,배재원,이보연,이예진,임의롬,정다영,조한솔 이화여자대학교 간호과학대학 2013 이화간호학회지 Vol.- No.47
Purpose: The purpose of this study was to understand the degree of depression, sleep quality, job stress and their association among office workers. Method: A self-administered questionnaire was distributed to 147 workers employed in 5 big enterprises, and 5 small and medium enterprises from October 21 to November 21, 2012. The questionnaires included socio-demographic and health-related characteristics, job-related characteristics, sleep quality, job stress (KOSS) and depression (CES-D). Result: Among all subjects, 23.1% was in the depression group (21 points and over in the CES-D score). Depressive level was positively correlated with job stress and quality of sleep. The adjusted odd ratio for the effects of sleep quality and job stress on depression significantly increased in the depression group compared to that of the normal group. Multiple regression analysis revealed that the following factors of influence had combined explanatory powers on depression: BMI, life satisfaction, quality of sleep, and job stress. Conclusion: The study revealed that complicated influences were exerted on the level of depression by variable factors, as well as socio-demographic characteristics, health-related characteristics, quality of sleep, and job stress. Specifically, the level of depression was influenced by the quality of sleep and job stress.
홍고추의 유전형 및 재배환경 요인에 따른 비타민 성분의 자연변이 연구
이소영(So-Young Lee),김은하(Eun-Ha Kim),백다영(Da-Young Baek),이경민(Gyeong-Min Lee),박수윤(Soo-Yun Park),이상구(Sang-Gu Lee),류태훈(Tae-Hoon Ryu),강현중(Hyeon-Jung Kang),오선우(Seon-Woo Oh) 한국식품영양과학회 2020 한국식품영양과학회지 Vol.49 No.3
홍고추는 사람의 식이에서 주요 비타민 공급원이며, 우리나라 사람들은 홍고추를 많이 섭취하고 있다. 그러나 홍고추의 비타민 함량에 대한 품종, 재배지역 및 재배연도에 의한 성분의 자연변이 연구는 국내에서 거의 수행되지 않았다. 이를 위하여 본 연구에서는 12개 상업품종을 대상으로 2016년도와 2017년도 2년간, 2개 지역(4개의 재배환경)에서 재배 및 수확하여 홍고추 과육에서 비타민 A, 비타민 B₁, 비타민 B₂, 비타민 B₃, 비타민 B5, 비타민 E(α-, β-, δ-, γ-tocopherol) 함량을 비교 분석하였다. 고추 과육에서 분석한 비타민 함량을 통합하여 4개 재배환경에 대한 자연변이를 비교하기 위해 통계 알고리즘을 개발하고 적용한 결과, 비타민의 성분은 품종별, 지역별, 연도별로 자연변동성에 유의미한 차이를 보였다. PLS-DA를 이용한 주성분 분석과 더불어 R 통계 기법을 이용한 변동성(% variability) 분석을 실시한 결과, 비타민 성분의 자연변동성은 품종 요인보다는 재배지역이나 재배연도 또는 세 가지 통합 요인의 교호작용에 의해 더 많은 영향을 받는 것으로 확인되었다. 특히 비타민 C와 비타민 B₂, 비타민 B₃, γ-tocopherol은 주로 재배연도에 의해 성분변이가 큰 것으로 분석되었다. α-Tocopherol은 품종 요인에 의해 변이가 비교적 큰 것으로 나타났으나, 세 가지 요인의 교호작용에 의한 변이가 가장 큰 것으로 분석되었다. 비타민 B5는 품종별 요인에 의해 성분변이가 가장 크게 나타났으며, β-tocopherol은 지역 요인에 의한 성분변이가 가장 큰 것으로 나타났다. 비타민 분석 결과에 대해 품종별, 지역별, 연도별로 다변량 통계분석(PLS-DA)을 실시한 결과, 재배지역과 재배연도 요인에 의한 데이터 클러스터가 가시적으로는 뚜렷하게 구분되었으나, PC1과 PC2의 합산 분산력이 60% 미만으로 2차원의 주성분으로 전체 데이터의 분산을 설명하기에는 약간 부족한 것으로 확인되었다. 따라서 비타민 성분의 환경 요인에 의한 변동성 또는 분산력을 설명하기 위해서는 정량적 통계분석 방법인 자연변동성(% variability) 분석이 추가로 수행되어야 하는 것을 알 수 있었다. Red peppers are a remarkably rich source of vitamins in the human diet and widely consumed in Korea. However, comprehensive studies have not reported on the effects of genotype, cultivation regions, and year of cultivation on the vitamin composition of the pepper fruits. To address this, twelve commercial pepper varieties were grown at two locations in Korea during 2016 and 2017, and the concentrations of vitamin A, B₁, B₂, B₃, B5, and E (α-, β-, δ-, γ-tocopherols) in pepper pericarps were determined. Statistical analysis of the combined data showed significant differences among varieties, locations, and years for the measured components. The % variability analysis demonstrated that environment (location and year) and genotype-environment interaction contributed more to the nutritional contents than the genotype alone. Particularly, variation in vitamins A, C, B₂, B₃, and γ-tocopherol was attributed to the year of cultivation. α-Tocopherol primarily varied by the genotype-environment interaction. Vitamin B5 was the trait that the most highly affected by genotype. The location effect was significant for β-tocopherol. Partial least squares discriminant analysis (PLS-DA) results showed that the separation of vitamins was distinct by year and location. These results were supported by the % variability analysis. Our study could explain the natural variation in the vitamin compositions of peppers by genotypes and environments.