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鄭然厚,鄭天容,鄭仁杰,韓仁圭 서울大學校 農科大學 1976 서울대농학연구지 Vol.1 No.2
To investigate the nutritive value of sweet potato starch pulp silage and corn starch pulp for milk cows, 30 Holstein cows were divided into two groups of strach pulp silages and each fifteen cows were divided into 3 treatments (control, 40% starch pulp silage, 60% starch pulp silage) during three milk periods, which were 20 days respectively. The results obtained were as follows : 1. Contents of moisture, crude protein, DCP, TDN of sweet potato starch pulp silage and cornstarch pulp silage, which were made from raw starch pulp 60%, wh- eat bran 33%, corn gluten meal 7%, lactic acid bacteria, were 51.5, 48.6, 8.13, 9.65, 5.99, 7.73, 41.06, 44. 90%, respectively. 2. As the level of substitution by sweet potato or corn starch pulp silage was increased, milk yields was increased nonsignificantly and butter fat was not si- gnificantly different. 3. Daily feed intake of starch pulp silage, concentrates, green forage was not significantly different among treatments, since the feeds allowances were deter- mined by daily milk yields. 4. Body weight gain of milk cows during experimental periods was a little incr- eased as the level of substitution of starch pulp silage was increased. 5. Cost of concentrates (starch pulp silage included) per kg of milk yields was shown to be profitable as the level of substitution of starch pulp silage was increased. Consequently it could be concluded that sweet potato or corn starch pulp silage can be fed upto 60% without any adverse effects on milk production and may be profitable for milk cows.
Analysis of Porcine -casein Gene Promoter by Site-directed Mutagenesis
Chung, Hee-Kyoung,Seong, Hwan-Hoo,Im, Seok-Ki,Lee, Hyun-Gi,Kim, Soon-Jeung,Lee, Poongyeong,Lee, Yun-Keun,Chang, Won-Kyong,Moosik Kwon 한국수정란이식학회 2002 한국수정란이식학회 학술대회 Vol.2002 No.1
Promoters for milk proteins have been used far producing transgenic animals due to their temporal and spatial expression patterns. -casein, a calcium-sensitive casein, is a major milk protein that corresponds ca. 30 per cent of total milk protein. Expression of -casein is controlled by lactogenic hormones such as prolactin (PRL), composite response elements (CoREs) and transcription factors. CoREs are clusters of transcription factor binding sites containing both positive and negative regulatory elements. -casein gene promoter contains various regions (CoREs) for gene transcription. We analyzed the promoter region by mutagenesis using exonuclease III and linker-scanning. Transcription control elements usually are positioned in 5'-flanking region of the gene. However, in some cases, these elements are located in other regions such as intron 1. The nucleotide sequences of -casein promote. region has been reported (E12614). However, the properties of the promoter is not yet clear. In this study, we plan to investigate the properties of cis-regulating elements of porcine -casein by mutation analysis and expression analysis using dual-luciferase repoter assay system.
전자빔 증착법에 의한 티타늄 전극 구조 염료 태양전지 제작에 관한 연구
김윤기(Yun-Gi Kim),심충환(Choung-Hwan Shim),김현규(Hyun-Gyu Kim),성열문(Youl-Moon Sung),김동현(Dong-Hyun Kim),이해준(Hae-June Lee),박정후(Chung-Hoo Park),이호준(Ho-Jun Lee) 대한전기학회 2010 전기학회논문지 Vol.59 No.4
In general, Dye-sensitized Solar Cells(DSCs) consist of the nanocrystalline titanium dioxide(TiO₂) layer which is fabricated on a transparent conductive oxide(TCO) layer such as F/SnO₂ glass, a dye adhered to the TiO₂, an electrolyte solution and platinum-coated TCO. Among these components, two TCO substrates are estimated to be about 60% of the total cost of the DSCs. Currently novel TCO-less structures have been investigated in order to reduce the cost. In this study, TCO-less DSCs consisting of titanium electrodes were investigated. The titanium electrode is deposited on top of the porous TiO₂ layer using electron-beam evaporation process. The porosity of the titanium electrode was found out by the SEM analysis and dye adhesion. As a result, when the thickness of the titanium electrode increased, the surface resistance decreased and the conversion efficiency increased relatively.