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권일경,김현욱 ( Ill Kyung Kwon,Hyun Uk Kim ) 한국축산학회 1978 한국축산학회지 Vol.20 No.3
In order to maximize the methane production from several animal feces, various parmeters have been studied for their optimum values. The fecal material tested includes manures of pig, chicken, and cows. When we inoculate the fresh tank with old tank sediment which was supposed to contain large number of methane bacteria, we could not increase the total volume of methane produced but could intensify the methane production. within faster and shorter period of time and the pH stubilaiztion could be achieved more easily with in shorter length of time. Predigestion of fecal material did not seem to increase the methane production efficiency as far as concerned with those animal feces tested. Total average methane production(scrubbed once through 1N NaOH solution) per one gram of fecal organic matter is 235.3㎖ for cow feces, 418.0㎖ for pig feces, and 590.6㎖ for chicken manure. After replaced 30% of the tank material with fresh manure (5% organic matter), the peak gas production was reached within 20-30 hours and the optimum pH appeared to lie between pH 6.5 and pH 7.5. When the tank temperature was lowered from 35℃ to 20℃, methane production rate was diminished at a ratio of 1 : 10 and accordingly pH was decreased. After several days of this temperature lowering, the methan production rate could be easily recovered if the temperature is increased back to 35℃, which means methane production could survive the intermittent temperature shock. For the winter management of methane tank especially during cold Korean winter, the cheap solar collector is being tested to warm the tank with in the vinyl house.
국산 치커리 올리고당을 이용한 가축용 Prebiotics 개발
권일경,김거유,홍석민 강원대학교 동물생명과학연구소(구 강원대학교 동물자원공동연구소) 2005 동물자원연구 Vol.16 No.-
The obsective of this study is to compare domestic chicory root powder with foreign chicory fructooligosaccharide (FOS) in effect of microflora in piglet feces and to sustitude domestic chicory for foreign chicory. The prebiotic effects of FOS from chicory (Chicorium intybus) was evaluated for livestock feed supplement. Chicory is a turberous plants containing inulin ,with high fructose contents its root. Piglets were fed one of three diets for 5 weeks, a control diet, a basal diet containing 0.2% of foreign chicory FOS and a basal diet containing 0.3% of domestic chicory root powder. Prebiotic effects of foreign chicory FOS and domestic chicory root powder were examined for their effects on the growth of fecal microorganism with piglet along with measuring pH changes of collected piglet feces during experimental periods (5 weeks). The results showed that the growth of Lactic acid bacteria (LAB) was significantly increased after feeding chicory FOS and chicory root powder supplemented feeds, and the increased occupancy ratio of LAB in the feces was observed. However, the occupancy ratio of Escherichia coli in piglet feces was continuously declined after treating feeds containing chicory FOS and root powder. No remarkable changes were observed in the growth of Clostridium perfringens throughout the experimental periods. A significantly decreased pH of the collected feces was observed after feeding chicory FOS and chicory root powder supplemented feeds. It was noteworthy that feeding chicory root powder more effectively decreased pH levels than those of chicory FOS. As a result of this it was expected that FOS from chicory could be applicable to pigs as prebiotics.
권일경,이상용 공주대학교 생산기술연구소 2000 論文集 Vol.8 No.-
인터넷의 발달은 정보의 바다를 넘어서 세계를 묶는 단일 커뮤니티로 발달하고 있으며 이러한 인터넷 사용자들의 관심 정보 획득을 돕기 위한 방법으로 새로운 사용자들을 추천하는 인맥 구축 에이전트 시스템을 제안한다. 본 논문에서는 인맥 구축을 위하여 연관 규칙과 그룹 프로파일을 적용하고 이를 해석하여 개인 성향을 파악하고 인맥을 구축하는 시스템을 구현하였다.