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Hwangbo, Soon,Choi, Sun Ho,Kim, Sang Woo,Son, Dong Soo,Park, Ho Sung,Lee, Sung Hoon,Jo, Ik Hwan Asian Australasian Association of Animal Productio 2009 Animal Bioscience Vol.22 No.8
This study was carried out to investigate effects of crude protein (CP) levels in total mixed rations (TMR) on growth performance and meat quality in growing Korean black goats. Thirty-six 6-month-old growing black male goats (initial body weight =17.95${\pm}$0.13 kg) were used. The goats were randomly divided into four treatments and 9 animals were allotted to each treatment. In terms of treatments, CP levels in TMR were 14, 16, 18, and 20% of dry matter (DM) and all diets were isocaloric (2.4 Mcal ME/kg DM). The experiment lasted for 20 weeks with a 15-day adaptation period. After the end of the trial, five goats from each treatment were slaughtered to measure carcass characteristics and meat quality. Average daily gain (ADG) significantly (p<0.05) increased as dietary CP levels increased, but the highest ADG was found on the 18% CP treatment. The higher CP levels in TMR significantly (p<0.05) decreased feed conversion ratio, but the lowest ratio was on the 18% CP treatment, suggesting a higher bioavailability of nutrients by balanced energy and protein levels on this treatment. There was no significant difference in dressing percentage among treatments, but there was a tendency for levels more than 16% CP in TMR to have a comparatively higher dressing percentage than the 14% treatment. The percentages of meat, fat and bone were not significantly influenced by dietary CP levels. Dietary CP levels did not influence chemical composition of goat meat. Furthermore, there was no significant difference among treatments in any of the sensory parameters except for tenderness. Tenderness was similar for 18 and 20% treatments, which were significantly (p<0.05) higher than the 14% treatment. The results from this study suggested that an adequate CP level in TMR for achieving optimal growth performance and meat quality of growing Korean black goats might be 18% of DM, and that dietary CP level above 18% seemed not to further increase growth performance and meat quality.
Bae Soon Son,Sung Hwan Bae,Sam Jin Kim,Chul Sung Kim IEEE 2009 IEEE transactions on magnetics Vol.45 No.6
<P>Magnetic structure of Fe<SUB>1-x</SUB>Zn<SUB>x</SUB>Cr<SUB>2</SUB>S<SUB>4</SUB> (0.1 les x les 0.9) has been studied with magnetic susceptibility, X-ray diffraction and Mossbauer spectra. The crystal structures are found to have a cubic spinel with space group Fd3m. The lattice constants decrease with increasing Zn concentrations. According to magnetic susceptibility measurements, Neel temperature (T<SUB>N</SUB>) decreases with increasing Zn concentrations from x=0.5 to 0.7, especially T<SUB>N</SUB> dramatically decreases from 105 K to 45 K. The magnetic ground state reveal transition from ferrimagnetic to anti-ferromagnetic behavior at x=0.7. It is interpreted that the order of magnetic ions between tetrahedral (A) site ion and octahedral (B) site ion is antiparallel. The Mossbauer spectra show asymmetrical shapes due to large electric quadrupole interaction, magnetic hyperfine field of samples decrease in ferrimagnetic behavior ranges and increase in antiferromagnetic behavior ranges at 4.2 K. The magnetic hyperfine field of all samples for Zn concentration x = 0.1, 0.3, 0.5, 0.7 and 0.9 are 156, 128, 116, 131 and 138 kOe, respectively. It is described that the magnetic dipole interaction was weakened as substituting Zn ions in replacement of Fe on A site.</P>
돈분과 톱밥의 혼합비율이 지렁이 생존에 미치는 영향 : Eisenia foetida
황보순,조익환,박창일,손장호 대구대학교 생명과학연구소 2002 생명과학연구 Vol.1 No.2
본 연구는 톱밥의 혼합비율을 달리한 돈분을 대상으로 부숙기간별 이화학적 변화를 측정하고 이를 바탕으로 생존율을 조사하여 가축분의 효율적인 vermicomposting의 기초자료로 이용하고자 실시하였다. 그 결과를 요약하면 다음과 같다. 부숙이 경과함에 따라 지렁이가 생존하기 시작하여 8주부터 A구(돈분 100%)를 포함한 모든 구에서 지렁이의 생존이 가능하였다. C/N비는 부숙이 경과함에 따라 낮아졌으며, 톱밥혼합 비율이 높을수록 C/N비가 유의하게 높아 톱밥첨가 40인 E구가 다른구 보다 유의하게 높았다(P<0.05). 지렁이가 생존하기 시작한 C/N비는 10.8~16.0으로 나타났다. 톱밥 혼합비율을 달리한 돈분의 pH 변화는 부숙이 경과함에 따라 점차 pH 7.5에 가까워지는 경향을 보였으며 지렁이가 생존하기 시작한 pH는 7.5~8.0으로 나타났다. Ec의 변화는 부숙 경과에 따라 거의 없었으며, 처리구간에서는 톱밥첨가가 많을수록 낮아졌으며 지렁이가 생존하기 시작한 Ec는 2.2~4.7mS/㎝으로 나타났다. This study was performed to investigate the effect of different mixture ratio of the sawdust and swine manure and to measure C/N ratio, ph, Ec of the ripening of that and investigate on survival of earthworm with that and to use to efficient vermicomposting of swine manure as basic information. The results are summarized as follows. According as ripening of different mixture ratio of the sawdust and swine manure, earthworm begins to exist and survival of earthworm is possible in all including A(swine manure 100%) since 8 weeks. According as ripening, C/N ratio became low and sawdust mixing ratio is high. C/N ratio is significantly higher in E(sawdust 40%) than A, B, C and D(P< 0.05). C/N ratio that earthworm begins to exist appeared by 10.8∼16.0. pH value change of looked tendency that approach to pH 7.5 gradually according as ripening. pH value that earthworm begins to exist appeared by 7.5∼8.0. Electrolytic conductivity became low sawdust addition ratio is high. Electrolytic conductivity that earthworm begins to exist appeared by 2.2∼4.7mS/㎝.
Diniconazole 처리가 일일초와 샐비어의 생장 및 개화에 미치는 영향
Sung-Hwan Choi(최성환),Jum-Soon Kang(강점순),Young-Whan Choi(최영환),Yong-Jae Lee(이용재),Young-Hoon Park(박영훈),Mi-Ra Kim(김미라),Beung-Gu Son(손병구),Hyeun-Kyeung Kim(김현경),Hong-Yul Kim(김홍열),Wook Oh(오욱),Hak-Bo Sim(심학보) 한국생명과학회 2011 생명과학회지 Vol.21 No.7
따라서 본 실험에서는 생장 억제에 효과 있는 기존의 생장억제제인 스미세븐은 고가의 생장억제제이므로 이을 대신할 수 있으며 지금까지는 주로 살균제로 사용되고 있는 빈나리의 농도별 처리가 일일초과 샐비어의 생장 및 개화에 미치는 영향에 대해서 조사하였다. 일일초와 샐비어 모두 빈나리처리에 의해서 생장이 억제되었다. 두 식물체 모두 빈나리 100 ㎎/ℓ 처리가 스미세븐 5 ㎎/ℓ보다 높은 생장억제효과를 나타내었다. 빈나리 처리에 의해서 두 식물체 모두 엽장은 감소하였으나 엽폭은 큰 변화가 없었다. 그 결과 엽형이 둥굴어지는 현상이 나타났다. 개화소요일수는 일일초과 샐비어 모두 대조구에 비해 빈나리 처리시 증가하였다. 일일초의 꽃수는 빈나리 400 ㎎/ℓ 처리를 제외하고 대조구와 큰 차이가 없었다. 샐비어의 경우 빈나리 100, 200 ㎎/ℓ 처리에 의해서 소화수가 증가하였다. This study was conducted to investigate the effects of uniconazole (Sumiseven), an existing expensive growth retardant, and diniconazole (Binnari), used as a cheap germicide, on the growth and flowering of Vinca major and Salvia splendis for the possibility of substitution for expensive growth retardants. The growths of V. major and S. splendis were retarded by Binnari treatment. The effect of Binnari 100 ㎎/ℓ treatment was higher than that of Sumiseven 5 ㎎/ℓ treatment in both plants. The length of leaves was remarkably retarded by Binnari treatment, however, the width of leaves was only slightly retarded, giving the leaf a round shape. The number of days to flowering was increased by Binnari treatment in both in V. major and S. splendis. The number of days to flowering in V. major showed no significant difference compared to the control except by treatemtn with Binnari 400 ㎎/ℓ. The number of florets of S. splendis increased with treatment with Binnari 100 and 200 ㎎/ℓ.
양순신(Soon Shin Yang),강연철(Yeon Chul Kang),손재연(Jae Yeon Son),오민환(Min Hwan Oh),김정호(Jeong Ho Kim),조진연(Jin Yeon Cho) 한국항공우주학회 2014 韓國航空宇宙學會誌 Vol.42 No.4
성공적으로 달 탐사를 수행하기 위해서는 달착륙선의 안전한 착륙이 보장되어야 한다. 그러므로 안전한 착륙을 저해하는 착륙 시 충격하중을 감소시키기 위해서는 효율적인 달착륙선 충격흡수장치를 설계해야 한다. 또한 더욱 현실적인 달착륙선 설계를 위해서는 달토양의 특성을 고려하는 것이 중요하다. 이에 본 논문에서는 달 토양의 특성을 반영한 달착륙선 착륙 해석 모델을 구축하고, 효율적인 충격력 감소를 위해 달착륙선의 충격흡수장치에 대한 최적설계를 수행하였다. 최적설계는 메타모델 기반의 순차적 근사 최적설계기법을 이용하여 수행하였으며, 최적설계 결과로 부터 본 연구에서 사용된 최적화 방법을 통해 달착륙선에 가해지는 충격력을 효과적으로 저감시킬 수 있음을 확인하였다. To successfully explore the moon by lunar lander, it is essential to guarantee the safe landing of lunar lander. Therefore, efficient shock absorption system of lunar lander should be designed in order to reduce landing impact force. Also, for more practical design of lunar lander, it is important to consider the effect of lunar regolith. In the line of thought, finite element model of lunar lander considering the effect of lunar regolith is developed. To reduce landing impact force, optimization of shock absorption system for lunar lander has been carried out. In optimization, sequential approximate optimization method based on meta-model is used. Through the result of optimization, it is verified that landing impact force on lunar lander can be efficiently reduced by the present optimization procedure.