돼지 교배조합별 등심의 품질특성 비교

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.

간호대학생의 에니어그램 성격유형에 따른스트레스 대처방식

김희주,박가영,박지영,송예빈,심지현,이수연,이지영,장주희,정영민 이화여자대학교 간호과학대학 2011 이화간호학회지 Vol.- No.45

The purpose of this study is to analyze the relationship between stress coping behaviors and Enneagram personality types. The subject of the study is 342 college students who are attending 4-year nursing colleges in Seoul, Korea, and 198 students among them are qualified for the study. Typified statistical tools SPSS, chi-square, and ANOVA are used as analyzing methods in the study. The research results are as follows: 1. In nursing students, freshman class is the highest population in the study with 63 students(31.82 %), and the highest percentage of population does not have a religion(89 students, 44.95 %). 120 students (60.61 %) answered that their interpersonal relationships are good, and 105 students(53.03 %) are satisfied with the nursing major. 2. In Enneagram personality type, 9 type is the highest(42.42 %). 3. Problem focused coping type is the highest in stress coping behaviors(28.12(±20.16) points). 4. Problem focused coping behavior and social support coping behavior show significance. 5. Social support coping behavior shows significance, and 3 type scored the highest(17.67(±2.66) points). Further studies are suggested based on above results: First, in order to achieve more accurate results, the research of Enneagram and stress coping behavior with representative for sample Korean nursing students is necessary. Second, Development and verification the effect of stress coping program based on Enneagram personality types among nursing students are necessary.

Yarrowia lipolytica의 Multicopy Integration Vector 개발

김정윤,우문희,Dewey D.Y. Ryu 한국산업미생물학회 1995 한국미생물·생명공학회지 Vol.23 No.5

Multicopy integration vector는 복제수가 많고 non-selective한 환경조건 하에서도 매우 안정되게 유지가 되기 때문에 heterologous 유전자를 발현시키는데 매우 유용한 벡터 시스템이다. Yarrowia lipolytica의 multicopy integration vector를 개발하기 위하여 Y. lipolytica로부터 P-type rDNA를 클로닝하였다. 이 클론된 rDNA의 HindIII-BglII 절편과 promoter 지역을 포함하고 있지 않은 URA3 유전자를 pGEM1 plasmid에 삽입하여 제조한 벡터를 pMIYL-1과 pMIYL-2로 명명하였다. RDNA 절편은 벡터와 chromosomal DNA 사이에 homologous recombination을 유도하기 위한 것이며, promoterless URA3는 불완전한 표지 유전자로서 multicopy integration을 유발시키기 위한 것이다. PMIYL-1은 rDNA의 HindIII-BglII 절편내에 유일한 제한효소 자리로서 KpnI을 가지고 있고, pMIYL-2는 KpnI과 EcoRI을 가지고 있다. 이 벡터들을 Y. lipolytica에 도입한 후에 형질 전환체를 선별하여 copy 수와 안정성을 검사한 결과, 벡터의 copy 수는 5개 이하로 존재하고 non-selective 배지에서도 매우 안정하게 유지가 됨을 알 수 있었다. Multicopy integration vector is a very useful vector system in that they can be integrated into chromosomal DNA in several copies and stably maintained under non-selective conditions. To develop a multicopy integration vector system in the yeast Yarrowia lipolytica, P-type ribosomal DNA was cloned from Y. lipolytica. A HindIII-BglII fragment of the cloned rDNA and a promoterless URA3 gene were inserted into pGEM1, generating multicopy integration vectors, pMIYL-1 and pMIYL-2. The rDNA fragment is for targeted homologous recombination between the vector and the chromosomal DNA of Y. lipolytica, and the promoterless URA3 gene is a defective selection marker for inducing multicopy integration. pMIYL-1 and pMIYL-2 have an unique restriction enzyme site, KpnI, and two unique restriction enzyme sites, KpnI and EcoRI, repectively, which can be used for targeting of the vectors into the rDNA of Y. lipolytica chromosomal DNA. After transformation of the vectors into Y. lipolytica, copy number and stability were analyzed by Southern hybridization. The vectors were found to be present in less than 5 copies per cell and were stably maintained during growth in non-selective media.

Crystalline structure dependence of luminescent properties of Eu³⁺-activated Y₂O₃-Al₂O₃ system phosphors

Jung, H.C.,Park, J.Y.,Seeta Rama Raju, G.,Jeong, J.H.,Moon, B.K.,Kim, J.H.,Choi, H.Y. Elsevier 2009 Current Applied Physics Vol.9 No.3

Eu<SUP>3+</SUP> doped Y<SUB>3</SUB>Al<SUB>5</SUB>O<SUB>12</SUB> (YAG), YAlO<SUB>3</SUB> (YAP) and Y<SUB>4</SUB>Al<SUB>2</SUB>O<SUB>9</SUB> (YAM) nanophosphors were prepared by solvothermal reaction method. The structural properties were studied by using their XRD measurements and the luminescent properties of these phosphors were investigated by the measurement of their excitation and emission spectra along with their decay curves. The relationship between the structures and the photoluminescence properties of the phosphors has been studied. The emission spectrum of Eu<SUP>3+</SUP> doped YAG phosphor is dominated by orange emission due to <SUP>5</SUP>D<SUB>0</SUB>-><SUP>7</SUP>F<SUB>1</SUB> transition with inversion symmetry. However, the emission spectrum of Eu<SUP>3+</SUP> doped YAP phosphor is dominated by red emission due to <SUP>5</SUP>D<SUB>0</SUB>-><SUP>7</SUP>F<SUB>2</SUB> transition without inversion symmetry. The PL spectrum of Eu<SUP>3+</SUP> doped YAM phosphor consists of similar emission intensities for both <SUP>5</SUP>D<SUB>0</SUB>-><SUP>7</SUP>F<SUB>1</SUB> (590nm) and <SUP>5</SUP>D<SUB>0</SUB>-><SUP>7</SUP>F<SUB>2</SUB> (607nm) transitions.

Characterization of thermal conductivity of SiO₂-Al₂O₃-Y₂O₃ glasses

Samal, S.,Lee, J.,Jeong, D.Y.,Kim, H. Elsevier 2015 Thermochimica acta Vol.604 No.-

The thermal properties of SiO<SUB>2</SUB>-Al<SUB>2</SUB>O<SUB>3</SUB>-Y<SUB>2</SUB>O<SUB>3</SUB> glasses were investigated within a temperature range of 25-800<SUP>o</SUP>C. This found that glass with a composition of 24Y<SUB>2</SUB>O<SUB>3</SUB>.21Al<SUB>2</SUB>O<SUB>3</SUB>.55SiO<SUB>2</SUB> exhibits a thermal conductivity of 1.04W/mK at room temperature, and thermal conductivity increases with temperature due to an increase in the amount of bridging oxygen. The thermal conductivity of glasses with a composition of xY<SUB>2</SUB>O<SUB>3</SUB>.21Al<SUB>2</SUB>O<SUB>3</SUB>.(79-x)SiO<SUB>2</SUB>, on the other hand, decreased with an increase in either the Y<SUB>2</SUB>O<SUB>3</SUB> content or Al<SUB>2</SUB>O<SUB>3</SUB>/SiO<SUB>2</SUB> ratio. This decrease in thermal conductivity was analyzed with respect to the decrease in phonon mean free path resulting from the increased non-bridging oxygen content, which revealed 24Y<SUB>2</SUB>O<SUB>3</SUB>.21Al<SUB>2</SUB>O<SUB>3</SUB>.55SiO<SUB>2</SUB> to have the maximum thermal conductivity of 1.7W/mK at 800<SUP>o</SUP>C. Glass systems incorporating yttria can therefore be considered suitable sintering additives for highly thermally conducting ceramics such as silicon nitride.

수험생활 중 경주 및 포항 지진 경험

김선주,김유영,김은주,박솔민,배지윤,이민영,이유진,정재원,Li Keying,Wuyingjinzhu,신수진,도지영 이화여자대학교 간호과학대학 2019 이화간호학회지 Vol.- No.53

Purpose: The purpose of this study was to understand the experiences of Gyeongju and Pohang earthquakes during the examinees’ life. Methods: This study applied Colaizzis’s Phenomenological method. The Data was collected through in-depth interviews with a total 8 students of university in Seoul. Results: On the analysis of the interviews, their experience can be expressed as ‘Feeling embarrassed and frightened by earthquakes’, ‘Reduced susceptibility to earthquake hazards due to heavy exam pressure’, ‘Increased exam stress due to earthquake’, ‘Feeling the inadequacy of examinees' earthquake related safety measures in retrospect’. Conclusion: This study was meaningful in deeply understanding of their experiences and revealing that the examinees were more focused on studying rather than actively coping with the disaster. Furthermore, it reconsider the social climate surrounding college admission exams. This study meaningfully discovered that examinees could not stably prepare for both the exam and the earthquake evacuation procedures due to the timing of the earthquake in relation to their upcoming college admission test. Therefore, this study highlighted the examinees’ difficulties due to the earthquakes and increased the necessity of acute phase nursing intervention in relation to the seismic safety education system.

Enhanced photoluminescence due to Bi³⁺ → Eu³⁺ energy transfer and re-precipitation of RE doped homogeneous sized Y₂O₃ nanophosphors

Jadhav, A.P.,Thi Dinh, T.D.,Khan, S.,Lee, S.Y.,Park, J.K.,Park, S.W.,Oh, J.H.,Moon, B.K.,Jang, K.,Yi, S.S.,Kim, J.H.,Cho, S.H.,Jeong, J.H. Pergamon Press 2016 Materials research bulletin Vol.83 No.-

Precipitation and re-precipitation of metal ions has been carried out from original and supernatant solution producing Bi<SUP>3+</SUP> - Eu<SUP>3+</SUP> doped Y<SUB>2</SUB>O<SUB>3</SUB>:Eu<SUP>3+</SUP> and Eu<SUP>3+</SUP>/Tb<SUP>3+</SUP> doped Y<SUB>2</SUB>O<SUB>3</SUB>, respectively. Shorter reaction time is unable to consume all metal ions present in the solution which can be utilized through re-precipitation process. The doping of Bi<SUP>3+</SUP> - Eu<SUP>3+</SUP> in Y<SUB>2</SUB>O<SUB>3</SUB> helps to absorb maximum UV light. The activation of Y<SUB>2</SUB>O<SUB>3</SUB> matrix by Bi<SUP>3+</SUP> and Eu<SUP>3+</SUP> ions, together and separately, were studied considering the excitation energy transfer to the luminescence centers. The successful replacement of Y<SUP>3+</SUP> by RE<SUP>3+</SUP> ions can help for fine tuning of emission wavelength. Re-precipitation of supernatant solution by adding terbium precursor can successively produce uniform sized Tb<SUP>3+</SUP> doped Y<SUB>2</SUB>O<SUB>3</SUB>:Eu<SUP>3+</SUP>. The re-precipitation of the supernatant solution ensures maximum consumption of metal ions for higher product yield and possible fine tuning of emission wavelengths.

착유우의 사료섭취량과 음수량이 산유량과 분뇨 배설량에 미치는 영향

최동윤,곽정훈,박치호,정광화,김재환,유용희,양창범,최홍림,안희권,Choi, D.Y.,Kwag, J.H.,Park, C.H.,Jeong, K.H.,Kim, J.H.,Yoo, Y.H.,Yang, C.B.,Choi, H.L.,Ahn, H.K. 한국축산환경학회 2007 축산시설환경학회지 Vol.13 No.1

본 실험은 우리나라에서 사육되고 있는 홀스타인 젖소 착유우의 사료 섭취량과 음수량이 산유량과 분뇨 배설량에 미치는 영향을 구명하기 위하여 수행하였다. 실험은 착유우 10두를 공시하여 수원의 축산연구소 낙농우사에서 봄, 여름, 가을, 겨울 등 4계절에 걸처 실시하였으며 그 결과는 다음과 같다. 1. 시험에 공시된 착유우의 건물섭취량은 평균 19.5kg으로 봄과 가을이 각각 23.9, 22.1kg으로 높았고, 여름과 겨울이 각각 17.0, 15.3 kg으로 낮은 섭취량을 보였다. 2. 착유우의 음수량은 평균 $77.2\ell$로, 여름이 $85.5\ell$로 가장 많았고 겨울이 $62.2\ell$로 가장 낮았으나 계절별 유의차는 보이지 않았다. 3. 착유우의 산유량은 평균 26.0kg으로 봄, 여름, 가을 및 겨울이 각각 30.8, 24.0, 25.4, 23.7kg으로 봄의 산유량이 가장 높았다(p<0.05). 4. 착유우의 분뇨 배설량을 계절별로 조사한 결과, 봄 64.4kg, 여름 63.5kg, 가을 60.4kg, 겨울 51.0kg으로 계절 간에 차이를 보였으며(p<0.05), 전체 평균 분뇨 배설량은 59.8kg이었다. 5. 착유우의 사료섭취량, 음수량, 산유량 및 분뇨 배설량과의 상관관계를 분석한 결과, 산유량과 음수량$(R^2=0.7742)$, 산유량과 사료 섭취량$(R^2=0.7459)$, 음수량과 뇨 배설량 $(R^2=0.7422)$, 사료 섭취량과 분 배설량$(R^2=0.6044)$, 산유량과 분 배설량$(R^2=0.692)$의 상관관계가 비교적 높았으나, 음수량과 분 배설량$(R^2=0.2950)$, 사료 섭취량과 뇨 배설량$(R^2=0.1985)$, 산유량과 뇨 배설량$(R^2=0.2335)$의 상관관계는 낮게 나타났다. 6. 따라서 산유량과 음수량, 산유량과 사료 섭취량의 상관관계식은 $Y=0.1919X_1+11.181(R^2=0.7742),\;Y=0.8568X_2+9.3067(R^2=0.7459)$(Y=milk yield $X_1=water$ consumption, $X_2=feed$ intake)로 추정할 수 있다. This experiment was conducted to determine the effect of feed intake and water consumption on milk yield and manure production in milking cows. The average feed intake(dry matter) of milking cows were 19.5kg/hd/d. Spring(23.9kg) and fall(22.1kg) feed intake rates when higher than in the summer(17.0kg) and winter(15.3kg/hd/d). The average water consumption of milking cows were $77.2\ell/hd/d$. Summer showed the highest value$(85.5\ell/hd/d)$ and winter showed the lowest value$(62.2\ell/hd/d)$. The average milk yield during spring, summer, fall, and winter was 30.8, 24.0, 25.4, and 23.7kg/hd/d, respectively. Milk yield during spring was found to be statiscally greater than for the other seasons. Manure production of milking cows during spring, summer, fall, and winter was 64.4, 63.5, 60.4, and 51.0kg/hd/d, respectively. Consequently, a relatively high correlation between milk yield and water consumption$(R^2=0.7742)$, milk yield and feed intake$(R^2=0.7459)$, water, consumption and urine production$(R^2=0.7422)$, feed intake and feces production$(R^2=0.6044)$, and milk yield and feces production$(R^2=0.6920)$ were observed in milking cows. The other hand, correlation between water consumption and feces production$(R^2=0.2950)$, feed intake and urine production $(R^2=0.1985)$, and milk yield and urine production$(R^2=0.2335)$ were found to be relatively low. Therefore, correlation equation between milk yield and feed intake, milk yield and water consumption can be estimated from : $Y=0.1919X_1+11.181(R^2=0.7742),\;Y=0.8568X_2+9.3067(R^2=0.7459)$(Y=milk yield $X_1=water$ consumption, $X_2=feed$ intake).

승화법에 의한 CdS 단결성 성장

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.

보건복지 교육훈련분야 웹(Web)기반 가상교육의 기반구축 연구

정은경,김지희,윤영희,신영학,신혜령,김수영,서신일,김정자,박대영,송순태 국립보건연구원 2000 국립보건원보 Vol.37 No.-