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사료 내 수준별 조단백질 조건에서 보호메티오닌과 보호라이신의 사료첨가 급여가 착유우 유생산성 및 유성분에 미치는 영향:메타분석
최낙진 한국유기농업학회 2016 韓國有機農業學會誌 Vol.24 No.4
The present study was conducted to investigate effect of dietary protected amino acid on milk yield and composition in dairy cow using meta-analysis. Total 21 research papers were employed in analysis, and mixed model was used for the analysis of effects. Effect of protected methionine (PM) and combination of protected methionine and lysine (PML) were investigated under two different levels of dietary crude protein (CP, <18% and >18%). For performance of dairy cow, milk yield, milk composition including milk fat and protein content and yield and 4% FCM (fat corrected milk) production were used for analysis. In case of milk yield, a trend of increment was found at PM supplementation at low CP (P=0.055). However, the effect of PM at high CP was detected as not significant (P>0.05). In case of milk protein, inclusion of PM at low CP showed significant decrement (P<0.05). However, there was no significant effect of MP on milk protein at high CP (P>0.05). Supplementation of MP at high CP level showed significant increment of milk fat (P<0.05). MP supplementation represented significant increment of 4% FCM production (P<0.05) regardless of dietary CP levels. Effects of PML on milk yield and composition at both of low and high dietary CP were not significant in this study. However, it seem to be that there was a possible positive effect of MPL application at high dietary CP on performance of dairy cow.
최낙진 한국출판학회 2014 한국출판학연구 Vol.40 No.1
이 논문에서는 남과 북의 상징 산이라 할 수 있는 백두산과 한라산을 종합적으로 다룬 백두산총서와 한라산총서를 비교 연구하였다. 이를 통해 백두산과 한라산에 대한 이해는 물론 단일 '산' 총서 출판의 출판학적 의미와 가치들을 살펴보고자 한 것이다. 연구결과, 두 총서 간에는 발간 주체, 중점 내용, 출간 성격, 집필기간 및 집필자 등에서 다음과 같은 특징들을 보이고 있었다. 발간 주체를 보면, 백두산총서는 북한 최고지도자의 영도목적으로 국가에 의해서 주도되었고, 한라산총서는 민간영역인 한라일보의 장기 기획 학술대탐사가 그 시발점이 되었다. 중점 내용은 백두산총서가 자연자원을 우선하고 있고, 한라산총서는 인문자원 중심의 총서라 할 수 있다. 이는 환경에서 연유한 것으로 백두산에 비하여 한라산의 자연기후가 삶의 터전에 가까웠기 때문이라 할 수 있다. 출간 성격을 보면, 백두산총서는 전문학술서에 가깝고 한라산총서는 교양입문서 성격을 갖는다. 백두산총서는 자연자원의 성격상 전문 학술 내용이 많을 수밖에 없으며, 한라산총서는 그 시작이 신문 연재였다는 점을 미루어 볼 때, 교양적 성격이 강하다 할 수 있다. 집필기간은 백두산총서가 한라산총서에 비하여 길고, 집필자 수도 많다. 백두산총서의 간행에 북한의 15개 국책연구기관이 참여한 반면, 한라산총서 간행은 한라일보의 '한라산학술대탐사'팀이 중심이 되었다. 2년이 채 안된 단기간에 한라산총서 간행이 마무리될 수 있었던 것은 신문 연재 자료가 있었기에 가능한 일이었다. 두 총서는 앞서의 특징과 차이점에도 불구하고, 단일 산을 주제로 한 전총(專叢)의 책으로 전 세계적으로도 그 가치를 부여할 수 있는 '산(山) 출판물'이라 하겠다. 또한 백두산총서의 발간이 한라산총서의 발간에 큰 영향을 주었다는 점은 남북교류 사업의 학술적 성과를 보여주는 유의미한 사례이기도 하다. This paper will deal with a comparative study of Baekdu Mountain Series and Halla Mountain Series, the series that comprehensively cover the two mountains that are generally recognized as the symbolic mountain for South Korea and North Korea, respectively. The intention is to examine the values and characteristics in terms of publication studies by comparing the two series. According to the research, the two series differed in various aspects including the main agent of publication, focus of contents, nature of publication, duration of writing and number of authors. Baekdu Mountain Series was initiated by the government, with the objective of having the supreme leader guide the people. Halla Mountain Series got its start from a scholarly long-term exploration led by Hallailbo, the civilian newspaper company. The focus of their contents also differs in that Baekdu Mountain Series deals mainly with natural resources while Halla Mountain Series deals mainly with human resources. This is primarily because of the surrounding environment: Halla Mountain is closer to human habitation than Baekdu Mountain. Regarding each series' nature of publication, Baekdu Mountain Series is closer to a professional academic book while Halla Mountain Series resembles an introductory series of cultural books. This is because of Baekdu Mountain's natural resources, which can lead to more professional and academic endeavors, while Halla Mountain Series started as a newspaper that naturally led the series to take on a more educational form. Regarding duration of writing and number of authors, Halla Mountain Series has taken a shorter time and fewer authors than Baekdu Mountain Series. Baekdu Mountain Series was created by 15 government-funded research centers, but Halla Mountain Series was created by a scholarly exploration team at Hallailbo. Halla Mountain Series finished its publication in less than two years. Despite the differences, the two series can be described as a professional series because similar cases of publication cannot be found elsewhere in the world. Moreover, the fact that Halla Mountain Series was greatly influenced by the publication of Baekdu Mountain Series serves as a meaningful case of a scholarly result from inter-Korean academic exchange.
최낙진,반태현,곽준혁,백원우,김재창,허증수,이덕동 한국전기전자재료학회 2003 전기전자재료학회논문지 Vol.16 No.12
Nerve gas sensor based on tin oxide was fabricated and its characteristics were examined. Target gas is dimethyl methyl phosphonate(C$_3$ $H_{9}$ $O_3$P, DMMP) that is simulant gas of nerve gas. Sensing materials were Sn $O_2$ added a-Al$_2$ $O_3$ with 0∼20wt.% and were physically mixed each material. They were deposited by screen printing method on alumina substrate. The sensor device was consisted of sensing electrode with interdigit(IDT) type in front and a heater in back side. Total size of device was 7${\times}$10${\times}$0.6㎣. Crystallite size & phase identification and morphology of fabricated Sn $O_2$ powders were analyzed by X-ray diffraction and by a scanning electron microscope, respectively. Fabricated sensor was measured as flow type and resistance change of sensing material was monitored as real time using LabVIEW program. The best sensitivity was 75% at adding 4wt.% $\alpha$-Al$_2$ $O_3$, operating temperature 30$0^{\circ}C$ to DMMP 0.5ppm. Response and recovery time were about 1 and 3min., respectively. Repetition measurement was very good with $\pm$3% in full scale.$\pm$3% in full scale.
열처리 단백질-광물질 복합제제 첨가가 In Vitro 발효성상과 착유우의 유량 및 유성분에 미치는 영향
최낙진,배귀석,남경표,장문백,엄재상,고종렬,하종규 한국동물자원과학회 2002 한국축산학회지 Vol.44 No.5
본 연구의 in vitro 실험결과를 살펴보면, 배양액의 pH와 암모니아 생성량은 전 배양시간 동안 처리구간 통계적 유의차가 없었다. Total VFA, acetate, propionate, butyrate 생성량은 12 h에서 HPM을 0.2%, 1% 첨가한 시험구에서 대조구와 비교하여 증가하는 경향이 있었으나, 2% 첨가구에서는 오히려 감소되었고, 48 h 에서는 HPM 첨가한 세 처리구에서 대조구와 비교하여 모두 증가하는 경향을 보였다. 반면에, 다른 배양시간대에서는 처리구간 통계적 유의차는 발견되지 않았다. A/P ratio 경우에도 처리구간 유의차는 없었다. 총 gas 생성량은 배양시간 24 h과 48 h에 HPM 처리구에서 대조구와 비교하여 증가하였다 (P<0.05). 한편 사양실험은 열처리된 단백질 (대두박)과 광물질의 복합 제제 (HPM)가 젖소의 유생산량과 유성분에 끼치는 영향을 조사하기 위하여 수행되었는데 그 결과를 요약하면, 유생산량은 대조구와 비교하여 HPM 시험구에서 하루에 약 1㎏ 정도 더 높았고 (27. 7 vs 28.8 ㎏/d, P<0.001), 4% FCM 생성량 또한 대조구와 비교하여 볼 때 HPM 시험구에서 1.3㎏/d 이 더 높았다 (P<0.001). 유단백 (P<0.05)과 SNF (P<0.05)도 대조구와 비교하여 HPM 시험구에서 그 생산량이 증가되었다. 반면에, 유지방, MUN과 체세포수는 처리구간 통계적 유의차가 발견되지 않았다. 이상의 결과로 보아, HPM 첨가에 의한 반추위 발효 저해현상은 없었으며, HPM 내 함유되어 있는 열처리된 단백질과 광물질의 결합체와 잔여 광물질이 반추위 내 단백질과 결합하여 단백질 분해 속도를 지연시킴으로써, 단백질의 by-pass율을 증가시켜, 유생산량 증가와 유질을 개선 (유단백질, SNF 함량 증가 등) 하는 등 젖소의 생산성을 향상시킨 것으로 요약할 수 있다. This study, consisting of two experiments, was conducted to determine the effects of feeding heat treated protein and mineral complex (HPM) on milk production and composition, and ruminal fermentation of Holstein dairy cows. In in vitro experiment, HPM levels were 0, 0.2, 1 and 2%, and Timothy hay, which was substrate, was milled as 1 ㎜ size, and the effect of HPM on pH and ammonia and VFA were analyzed after incubation times of 0, 6, 12, 24 and 48 h, respectively. The pH and ammonia production were not significantly different between treatments during the incubation. In addition, generally, total VFA and individual VFA were not affected by HPM on 0, 6 and 24 h. While, total VFA and individual VFA were increased in 0.2% and 1% of HPM supplemented treatments, but decreased in 2% of HPM treatment compared with control on 12 h. On 48 h, total VFA and individual VFA were increased in HMP treatment compared to control(P<0.05). However, A/P ratio was not affected by HPM supplementation. Gas production was higher in HPM treatment compared to control on 24 h (P<0.05) and 48 h (P<0.05). In lactating experiment, fourteen lactating Holstein cows were used for 4 months in a cross over experimental design. There were two treatment; no added HPM as a control and 0.2% of HPM added as a test treatment. Daily milk yield (P<0.001), 4% FCM (P<0.001), milk protein (P<0.05) and SNF (solid not fat; P<0.05) were increased in HPM treatment compared to control. While, milk fat, MUN (milk urea nitrogen) and SCC (somatic cell count) were not significantly different between treatments.
Detection of Blood Agent Gas Using SnO₂ Thin Film Gas Sensor
최낙진,이덕동,곽준혁,임연태,주병수,반태현 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.E2
In this study, thin film gas sensor based on tin oxide was fabricated to examine its characteristics. Target gas is acetonitrile (CH₃CN) which is a blood simulant for the chemical warfare agent. Sensing materials are SnO₂, SnO₂/Pt, and Sn/Pt with thickness from 1000 to 3000Å. The sensor consists of a sensing electrode with inter-digit (IDT) type in front side and a heater in rear side. Resistance changes of sensing materials are monitored on real time basis using a data acquisition board with a 12-bit analog to digital converter. Sensitivities are measured at different operating temperatures also with different gas concentrations and film thickness. The high sensitivity is obtained for Sn (3000Å)/Pt (30Å) at 300℃ for 3 ppm. Response and recovery times were about 40 and 160 s, respectively. Repetition measurements showed very good results with ±3% in full scale range.
Lactobacillus를 주성분으로 하는 생균제의 급여가 육계의 성장성적, 혈액성분 및 장내 유산균에 미치는 효과: 메타분석
최낙진,황인호,박철,김대철,백승우,문상호,조원모,홍성구,Choi, Nag-Jin,Hwang, In-Ho,Park, Chul,Kim, Dae-Cheol,Baek, Seoung-Woo,Moon, Sang-Ho,Cho, Won-Mo,Hong, Seong-Koo 한국유기농업학회 2011 韓國有機農業學會誌 Vol.19 No.4
Recently, the use of antibiotics to improve animal productivity in livestock industry was strictly restricted. For these reason, probiotics have been regarded as one of promising materials for an antibiotic alternative. In this study, we investigated how the probiotics influences on the performance of broiler chicken via meta-analysis. Eighteen researches from 1997 to 2010 were used for meta-analysis. The standard summary effects were calculated via fixed effect model and random effect model (Borenstein et al., 2009). Heterogeneity was calculated by using the Cochran's Q statistics (Kook et al., 2009) and publication bias was calculated via Egger's regression (Lee et al., 2011). In fixed model average daily gain, body weight serum protein content and cecal LAB showed positive effect significantly. Feed intake, feed/gain and serum cholesterol showed significant negative effect. In serum triglyceride, negative effect was found but significance was not shown. In random model, average daily gain body weight and cecal LAB showed positive effects with significance and feed/gain and serum cholesterol represented significant negative effects. Publication bias was found only in feed/gain.