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식물성단백질사료에 대한 건조우분첨가 가 계추의 성장에 미치는 영향
이재근,김군식 한국축산학회 1961 한국축산학회지 Vol.3 No.1
The effect of the cattle feces affecting chicks growing added to plant protein feeds. J. K. Lee K. S. Kim (1) The experiment has been designed to study feeding chicks on the dry cattle feces only instead of animal protein supplements. The experiment has shown that feeding on dry cattle feces can increase the body weight, and they have economical efficiency in feeding. (2) 20 chicks have been divided into 2-groups in the bamboo-floored-battery: the experimental soup has 10 chicks feed on 5% dry cattle faces, and the other one is the control group. The chicks of the experiment group have been fed on only 5% dry cattle feces and plant protein feeds, and the chicks of the control group have been fed on plant protein feeds and animal protein feeds. The both groups have been fed daily on dry mash and sufficient white clover. (3) The ration is composed as follows: (4) Individual chicks weight and its feed consumption lave been recorded daily for two weeks. (5) Considerations of the experiment result. There is no significant differences between the control group and the experiment group. 21st day t=1.936 42nd day t=1.021 63rd das t=1.562 90th day t=0.521
스핀코팅 방법으로 제작된 ZnO 나노 섬유질 박막의 전구체 농도에 따른 표면 및 광학적 특성
김민수,김군식,임광국,조민영,전수민,최현영,이동율,김진수,김종수,이주인,임재영,Kim, Min-Su,Kim, Ghun-Sik,Yim, Kwang-Gug,Cho, Min-Young,Jeon, Su-Min,Choi, Hyun-Young,Lee, Dong-Yul,Kim, Jin-Soo,Kim, Jong-Su,Lee, Joo-In,Leem, Jae-Young 한국진공학회 2010 Applied Science and Convergence Technology Vol.19 No.6
ZnO nano-fibrous thin films with various precursor concentrations ranging from 0.2 to 1.0 mol (M) were grown by spin-coating method and effects of the precursor concentration on surface and optical properties of the ZnO nano-ribrous thin films were investigated by using scanning electron microscopy (SEM) and photoluminescence (PL). ZnO nuclei were formed at the precursor concentration below 0.4 M and the ZnO nano-fibrous thin films were grown at the precursor concentration above 0.6 M. Further increase in the precursor concentration, the thickness of the ZnO nano-fibrous thin films is gradually increased. The intensity and the full-width at half-maximum (FWHM) of the near-band-edge emission (NBE) is increased as the precursor concentration is increased. The deep-level emission (DLE) is red-shifted as the precursor concentration is increased. 스핀코팅 방법을 이용하여 다양한 농도의 전구체로 ZnO 나노 섬유질 박막(ZnO nano-fibrous thin films)을 성장하였고, 그에 따른 표면 및 광학적 특성 변화를 scanning electron microscopy (SEM)와 photoluminescence (PL)을 이용하여 측정하였다. 전구체 농도가 0.4 mol (M) 이하 일 때는 성장률이 낮아 ZnO 핵생성만이 되었고, 0.6 M 이상일 때 ZnO 박막은 나노섬유질 구조가 되었다. 전구체 농도가 더욱 증가함에 따라 ZnO 나노 섬유질의 굵기가 굵어졌고 ZnO 박막의 두께도 단계적으로 두꺼워졌다. 전구체 농도가 증가함에 따라 ZnO 나노 섬유질 박막의 photoluminescence (PL)의 근밴드가장자리 광방출(near-band-edge emission) 피크 세기와 full-width at half-maximu (FWHM)이 증가하였고, 깊은 준위 광방출(deep-level mission) 피크는 적색편이(red-shift)하였다.
스핀코팅 방법으로 제작된 ZnO 박막의 두께에 따른 구조적 및 광학적 특성
임광국,김민수,김군식,최현영,전수민,조민영,김형근,이동율,김진수,김종수,이주인,임재영,Yim, Kwang-Gug,Kim, Min-Su,Kim, Ghun-Sik,Choi, Hyun-Young,Jeon, Su-Min,Cho, Min-Young,Kim, Hyeoung-Geun,Lee, Dong-Yul,Kim, Jin-Soo,Kim, Jong-Su,Lee, Joo 한국진공학회 2010 Applied Science and Convergence Technology Vol.19 No.4
스핀코팅 방법으로 제작된 ZnO 박막의 두께에 따른 구조적 및 광학적 특성에 관한 연구를 수행하였다. ZnO 박막의 두께가 두꺼워짐에 따라 줄무늬 모양의 폭과 밀도가 증가하고, 두께가 450 nm 일 때 줄무늬 모양은 사라지며 표면이 매끄러워졌다. ZnO 박막의 표면이 매끄러워졌을 때 orientation factor ${\alpha}_{(002)}$가 급격히 증가하였고, (002) 회절 피크의 FWHM (full width at half maximum)는 감소하였다. ZnO 박막의 NBE (near-band edge emission) 피크의 위치는 두께와 표면 형태의 영향을 거의 받지 않았으나, 매끄러운 표면을 갖는 ZnO 박막의 DLE (deep level emission) 피크의 위치는 청색편이 하였다. ZnO 박막의 두께가 증가함에 따라 DLE 피크에 대한 NBE 피크의 발광세기 비율이 증가하는 경향을 보였고, NBE 피크의 FWHM은 감소하는 경향을 보였다. Thickness effects on the structural and optical properties of ZnO thin films fabricated by spin coating method have been carried out. With increase in the thickness of the ZnO thin films, the width and density of striation shape are increased. The ZnO thin film with thickness of 450 nm has a smooth surface morphology. For the ZnO thin film with a smooth surface, orientation factor ${\alpha}_{(002)}$ is sharply increased and FWHM of (002) diffraction peak is decreased compared to the ZnO thin films with a striation shape surface. Thickness and surface morphology of the ZnO thin films hardly affect the NBE peak position. However, the DLE peak position is blue-shifted as the surface morphology is changed from striation to smooth surface. The PL intensity ratio of the NBE to DLE is increased and the FWHM of NBE peak is decreased as the thickness of the ZnO thin films is increased.
수열합성법으로 성장된 ZnO 나노막대의 전구체 농도에 따른 구조적 및 광학적 특성
조민영,김민수,김군식,최현영,전수민,임광국,이동율,김진수,김종수,이주인,임재영,Cho, Min-Young,Kim, Min-Su,Kim, Ghun-Sik,Choi, Hyun-Young,Jeon, Su-Min,Yim, Kwang-Gug,Lee, Dong-Yul,Kim, Jin-Soo,Kim, Jong-Su,Lee, Joo-In,Leem, Jae-Young 한국진공학회 2010 Applied Science and Convergence Technology Vol.19 No.3
수열합성법을 이용하여 전구체 용액 농도에 따라 성장된 ZnO 나노막대의 특성에 대한 연구를 수행하였다. ZnO 씨앗층은 sol-gel법으로 코팅하였고, 그 위에 ZnO 나노막대는 전구체 용액 농도를 0.01 M에서 0.3 M로 변화하여 성장시켰다. FE-SEM (field-emission scanning electron microscopy), XRD (X-ray diffraction), PL (photoluminescence)을 사용하여 ZnO 나노막대의 특성 변화를 분석하였다. 전구체 용액의 농도가 증가함에 따라 ZnO 나노막대의 직경과 길이가 증가하였으며 광학적 특성이 향상되었다. ZnO nanorods were grown on ZnO seed layer by hydrothermal method. The ZnO seed layer was coated by sol-gel method, and then the ZnO nanorods on ZnO seed layer were grown with different precursor concentrations ranging from 0.01 M to 0.3 M. FE-SEM (field-emission scanning electron microscopy), XRD (X-ray diffraction), and PL (photoluminescence) were employed to investigate the structural and optical properties of the ZnO nanorods. The diameter and length of ZnO nanorods are increased and also the optical properties are enhanced as the precursor concentrations are increased.