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임경순,서국성,김중계,설동섭,이용빈 ( Kyung S . Im,Kug S .Suh,Jung K . Kim,Dong S . Sul,Yong B . Lee ) 한국축산학회 1975 한국축산학회지 Vol.17 No.3
Semen were collected from 20 Korean bulls raised in Kyunggi Province with artificial vagina and quality, preservability in liquid state with and without glycerol and freezability were investigated. The results obtained in this study were summarized as follows: 1. Volume of semen, initial sperm motility index, number of sperm per ㎖ of semen, abnormality, pH and mounting times till ejaculation was 4.4㎖, 83.7, 10.3×10^8, 13.6%, 6.4 and 2.2, respectively. 2. In the case of liquid semen stored at 5℃ for 7 days, sperm motility index of diluted semen with glycerol was higher than that of diluted semen without glycerol. 3. Freeze-thawed semen which was stored at 5℃ for 6 days decreased slightly its sperm motility index during 1 and 2 days, but rapidly thereafter. 4. Forty-five percentage of the bull ejaculated showed more than 41 sperm motility index after freeze-thawing.
조현경(Huyn kyung Cho),김재철(Jae-Chul Kim),정승복(Seung-Bock Jung),임상국(Sang Kug IM) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.5월
This paper analyzes the effect of the energy saving and evaluates the economics using High Efficiency lighting. About 18 percent (17,000GWh) of total power demands in Korea are consumed in the lighting field. There isa lot of energy potential that can be saved because the power demand islower relatively than the others parts. The existing lighting that its length and electric energy are 32[mm] and 40[w] can alternate with high efficiency lighting which its length and electric energy are 26[mm] and 32[w]. Two Lightings is measuring the illumination and the electric energy and then are analyzed into the effect of the lighting saving by measurement.
탄산아파타이트로 된 인공골과 소뼈에서 유래한 무기질 골의 초기 골전도에 대한 연구
김도균,조태형,송윤미,판휘,이수연,진임건,김인숙,홍국선,황순정,Kim, Do-Kyun,Cho, Tae-Hyung,Song, Yun-Mi,Pan, Hui,Lee, Su-Yeon,Jin, Im-Geon,Kim, In-Sook,Hong, Kug-Sun,Hwang, Soon-Jung 대한악안면성형재건외과학회 2007 Maxillofacial Plastic Reconstructive Surgery Vol.29 No.6
Introduction: Although several types of calcium-phosphate coumpound have been frequently applied to osseous defects at maxillofacial area for many years, there is a controversy about its efficiency on bone conductivity comprared to xenograft bone substitute. Alloplastic carbonapatite has been introduced to improve disadvantages of hydroxyapatite and to mimic natural bone containing carbon elements. However, a preclinical study about its efficiency of osteoconductivity has not been reported. This study was performed to evaluate the early osteoconductive potential of synthetic carbonapatite with multiple pores relative to anorganic bovine xenograft. Materials and methods: Total 5 beagle dogs were used for maxillary augmentation model. The control (anorganic bovine xenograft) and experimental groups (synthetic carbonapatite) were randomly distributed in the mouth split design. After bone graft, all animals were sacrificed 4 weeks after surgery. Histological specimens with Masson Trichrome staining were made and histomorphometrically analysed with image analyser. The statistical analysis was performed using paired t-test. Results: In both groups, all animals had no complications. The experimental group showed relatively much new bone formation around and along the bone substitutes, whereas it was clearly reduced in the control group. The ratios of new bone area to total area, to material area and to the residual area excluding materials were higher in the experimental group ($0.13{\pm}0.03,\;0.40{\pm}0.13,\;0.20{\pm}0.06$ respectively) than in the control group ($0.01{\pm}0.01,\;0.03{\pm}0.02,\;0.03{\pm}0.03$, respectively). And the differences between both groups were statistically significant (p<0.001, <0.01, <0.01, respectively), while the ratio of material area to total area in two groups was not significant. Conclusion: Carbonapatite showed a high osteoconductivity in the early stage of bone healing compared to bovine derived anorganic bone substitute. This study suggests that this bone materials can be applied as a reliable bone substitute in the clinical treatment.