어려운 길만 골라 딛는다

윤창의(尹昶懿) 샘터사 1991 월간 샘터 Vol.22 No.7

돈분액비에 의한 답리작 사료작물 생산시 벼 생산성과 환경영향 평가

윤창,육완방,최기춘 한국초지조사료학회 2003 한국초지조사료학회 학술대회논문집 Vol.2003 No.1

질산염이 다량 축적된 Italian ryegrass 급여에 따른 면양의 혈액중 Methemoglobin 농도의 경시적 변화

윤창,전우복,송명희 ( C . Yoon,W . B . Chun,M . H . Song ) 한국축산학회 1989 한국축산학회지 Vol.31 No.12

This study was conducted to investigate the influence of nitrate accumulation in Italian ryegrass feeding on the change of methemoglobin and hemoglobin in sheep. 12 Corriedale wethers(average body weight 33kg) were fed Italian ryegrass containing average 0.469% N0₃ N. Blood samples were taken at l hour before feeding and 4, 5, 6, 7, 8, 9, 10 hours after feeding, and then hemoglobin and methemoglobin concentration in blood were determined. The results obtained were summerized as follows ; 1. No significant difference was observed in the changing pattern of hemoglobin concentration in blood. 2. There were large variations among the test animals in the capacity of methemoglobin formation of the Italian ryegrass feeding.

돈분액비(slurry)에 의한 답리작 사료작물생산과 환경보전적 이용기술개발

윤창,육완방,최기준 두레마을 친환경농업연구원 2003 친환경농업연구 Vol.5 No.1

근관와동 가봉재 종류에 따른 변연누출의 비교 분석

윤창 전남대학교 치과대학 1990 전남치대논문집 Vol.2 No.1

The roles of temporary sealing materials used in endodontics are important. Especially, its marginal sealing properties affect endodontic success and failure in endodontic treatment. The purpose of this in vitro study was to compare and evaluate the marginal sealing properties of various temporary restorative materials used in endodontic access cavity by using electrochemical method. Standard endodontic access cavities were prepared in extracted human molar teeth and filled with Caviton, IRM, zinc oxide - eugenol cement. Each specimen was immersed in 1% solution of KCI, and applied a potential of 9V external power supply. Margianl microleakage and water sorption were measured for marginal sealing effect evaluation in comparison with each group. A comparative study of the obtained results have led to the following conclusions. 1. The Caviton group showed lower marginal microleakage value than the zinc oxide-eugenol cement and IRM group the 6th day after. The IRM group showed lower marginal microleakage value than the zinc oxide-eugenol cement group from the 6th day to the 12th day. But there was no significant difference between zinc oxide-eugenol cement and IRM group after the 13th day. 2. As time went by, marginal microleakage value was increased in Caviton, IRM, and zinc oxide-eugenol cement. But, they had effective marginal sealing property within the 5th day. 3. The water sorption showed the highest value in Caviton and the lowest in zinc oxide-eugenol cement. There was evidence of correlation between the water sorption and marginal microleakage of temporary sealing material, and then, high water sorption was the cause of low marginal microleakage value in temporary sealing materials.

혼합 생균제의 급여가 육계의 생산성 및 계분의 유해가스 발생에 미치는 영향

윤창,나종삼,박재홍,한승관,남영민,권정택,Yoon C.,Na C. S.,Park J. H.,Han S. K.,Nam Y. M.,Kwon J. T. 한국가금학회 2004 韓國家禽學會誌 Vol.31 No.4

본 시험은 육계에서 생균제의 효과를 구명하고자 사료와 음수에 혼합 생균제를 수준별로 첨가하여 5주간 사양시험을 시행하였다. 처리구는 Bacillus sp., Lactobacillus sp., Saccharomyces sp., Rhdobacter sp., Aspergillus sp. 균으로 이루어진 혼합 생균제를 사료에 0, $0.2\%$ 수준으로 첨가하였고, 음수에는 0, 0.1, $1.0\%$ 수준으로 급여하였다. 시험사료는 조단백질 함량을 전, 후기 각각 $21.5\%$와 $19.0\%$로 하였고, 에너지는 전, 후기 3,100 kcal/kg 수준으로 배합하였다. 조사항목은 생산능력을 주간별로 측정하였고, 시험 종료시 혈중 콜레스테롤 함량, 회장과 맹장의 내용물에서 E. coli, Salmonella, Lactobacillus 균수, 분에서 암모니아와 이산화탄소 가스 발생 량을 조사하였다. 본 시험의 결과, 생균제를 사료에 첨가하여 급여한 D $0.2\%$ 급여구는 D $0\%$ 급여구와 비교하여 증체량, 사료섭취량, 사료요구율이 모든 조사기간에서 차이가 없는 것으로 나타났다. 사료 급여구간에 혈중 총콜레스테롤, HDL, LDL-cholesterol 및 중성지방의 함량은 통계적인 차이는 없었지만, 음수 급여구에서 DW $1.0\%$ 처리구의 혈중 총콜레스테롤 함량은 DW $0\%$ 처리구에 비하여 유의적으로 감소하였다. (P<0.05). 또한 중성지방 함량은 DW $0.1\%$ 처리구에서 DW $0\%$ 처리구에 비하여 현저하게 감소하였지만(p<0.05), HDL과 LDL-cholesterol의 함량은 차이가 없었다. 장내 미생물인 E. coli, Salmonella, Lacfobacillu 균수는 회장과 맹장에서 사료와 음수 급여시 차이가 없었다. 계분의 암모니아와 이산화탄소 발생량은 사료 급여시 D $0\%$와D $0.2\%$ 처리구간에 차이가 없었지만, 음수 급여시 DW $0.1\%$ 처리구는 다른 처리구에 비하여 암모니아 가스 배출량이 유의하게 감소하였다(P<0.05). 한편, 이산화탄소 발생량은 DW 처리구간에 차이가 없었다. 이러한 실험 결과, 생균제의 급여는 육계의 생산성과 장내 미생물의 변화에는 영향을 미치지 않았으나 음수로 급여시 혈중 콜레스테롤과 중성지방의 함량을 감소시켰고, 분내 암모니아 가스 발생량을 감소시키는 것으로 나타났다. A study was conducted to examine the effect of dietary supplementation of multiple probiotics (EM) on growth performance, blood cholesterol, intestinal micro flora, and fecal gas emission in broiler chicks. A total of 450 one day old male broiler chicks (Ross $\times$ Ross) were divided into six treatments with five replications in each treatment for five weeks. Treatments were factorially designed with two levels of diet containing probiotics (DW; 0, $0.2\%$) and three levels of drinking water containing probiotics (DW; 0, 0.01, $0.1\%$). Basal diets contained $21.5\%$ CP and 3,100 kcal/kg ME for starting and $19\%$ CP and 3,100 kcal/kg ME for finishing period. Weight gain, feed intake, and feed conversions of birds fed with probiotics were not significantly different between Ds. Total cholesterol and triglyceride levels were significantly lower (P<0.05) in birds fed with DW $0.01\%$ or $0.1\%$ compared with no probiotics group, but there was no significant difference between D treatments. The number of E. coli, Salmonella and Lactobacillus in the ileum and cecum of the birds fed multiple probiotics were not significantly different from those of no probiotic groups. There were no significant differences in the $CO_2$ gas emissions of fecal between birds fed with Ds or among birds fed with DW. However, $NH_3$ gas emissions of DW $0.1\%$ were significantly lower (P<0.05) than DW $0\%$. In the results of this study, supplementation of probiotics tended to decrease the serum cholesterol and triglyceride compared to those of control groups and reduction of fecal $NH_3$ gas emission.

질소시비수준이 생육단계별 수단그라스계 교잡종의 질산염 축적 및 수량에 미치는 영향 ( Effect of Nitrogen Fertilization and Agronomic Stage on Nitrate Accumulation and Forage Yield of Sorghum Sudangrass Hybrid )

윤창,최기춘 한국초지조사료학회 1999 한국초지조사료학회지 Vol.19 No.1

질소시비수준이 Italian ryegrass 및 청예 옥수수의 질산염 축적에 미치는 영향

윤창,전우복,이돈우 ( C . Yoon,W . B . Chun,D . W . Lee ) 한국축산학회 1990 한국축산학회지 Vol.32 No.1

This study was conducted to investigate the influence of the level of nitrogen fertilization and cutting date on the nitrate accumulation in Italian ryegrass and forage corn. Italian ryegrass and forage corn were applied with three different levels of nitrogen fertilization(10, 20 and 40kg N/10a), and the experiment was performed at the field of CNU in kwang-ju, from 1986 to 1987. The results obtained were summerized as follows : l. Significant difference were observed in nitrate concentration in Italian ryegrass and forage corn when nitrogen fertilizer were applied(p $lt;0.05). 2. The concentration of nitrate in forage corn seems to be less than that in Italian ryegrass.

혼합 생균제의 급여가 육계의 생산성 및 계분의 유해가스 발생에 미치는 영향

윤창,박재홍,한승관,남영민,나종삼,권정택 한국가금학회 2004 韓國家禽學會誌 Vol.31 No.4

A study was conducted to examine the effect of dietary supplementation of multiple probiotics (EM ) on growth performance, blood cholesterol, intestinal microflora, and fecal gas emission in broiler chicks. A total of 450 one day old male broiler chicks (Ross×Ross) were divided into six treatments with five replications in each treatment for five weeks. Treatments were factorially designed with two levels of diet containing probiotics (D; 0, 0.2%) and three levels of drinking water containing probiotics (DW; 0, 0.01, 0.1%). Basal diets contained 21.5% CP and 3,100 kcal/kg ME for starting and 19% CP and 3,100 kcal/kg ME for finishing period. Weight gain, feed intake, and feed conversions of birds fed with probiotics were not significantly different between Ds. Total cholesterol and triglyceride levels were significantly lower (P<0.05) in birds fed with DW 0.01% or 0.1% compared with no probiotics group, but there was no significant difference between D treatments. The number of E. coli, Salmonella and Lactobacillus in the ileum and cecum of the birds fed multiple probiotics were not significantly different from those of no probiotic groups. There were no significant differences in the CO2 gas emissions of fecal between birds fed with Ds or among birds fed with DW. However, NH3 gas emissions of DW 0.1% were significantly lower (P<0.05) than DW 0%. In the results of this study, supplementation of probiotics tended to decrease the serum cholesterol and triglyceride compared to those of control groups and reduction of fecal NH3 gas emission. 본 시험은 육계에서 생균제의 효과를 구명하고자 사료와 음수에 혼합 생균제를 수준별로 첨가하여 5주간 사양시험을 시행하였다. 처리구는 Bacillus sp., Lactobacillus sp., Saccharomyces sp., Rhdobacter sp., Aspergillus sp. 균으로 이루어진 혼합 생균제를 사료에 0, 0.2% 수준으로 첨가하였고, 음수에는 0, 0.1, 1.0% 수준으로 급여하였다. 시험사료는 조단백질 함량을 전, 후기 각각 21.5%와 19.0%로 하였고, 에너지는 전, 후기 3,100 kcal/kg 수준으로 배합하였다. 조사항목은 생산능력을 주간별로 측정하였고, 시험 종료시 혈중 콜레스테롤 함량, 회장과 맹장의 내용물에서 E. coli, Salmonella, Lactobacillus 균수, 분에서 암모니아와 이산화탄소 가스 발생량을 조사하였다. 본 시험의 결과, 생균제를 사료에 첨가하여 급여한 D 0.2% 급여구는 D 0% 급여구와 비교하여 증체량, 사료섭취량, 사료요구율이 모든 조사기간에서 차이가 없는 것으로 나타났다. 사료 급여구간에 혈중 총콜레스테롤, HDL, LDL-cholesterol 및 중성지방의 함량은 통계적인 차이는 없었지만, 음수 급여구에서 DW 1.0% 처리구의 혈중 총콜레스테롤 함량은 DW 0% 처리구에 비하여 유의적으로 감소하였다(P<0.05). 또한 중성지방 함량은 DW 0.1% 처리구에서 DW 0% 처리구에 비하여 현저하게 감소하였지만(P<0.05), HDL과 LDL-cholesterol의 함량은 차이가 없었다. 장내 미생물인 E. coli, Salmonella, Lactobacillus 균수는 회장과 맹장에서 사료와 음수 급여시 차이가 없었다. 계분의 암모니아와 이산화탄소 발생량은 사료 급여시 D 0%와 D 0.2% 처리구간에 차이가 없었지만, 음수 급여시 DW 0.1% 처리구는 다른 처리구에 비하여 암모니아 가스 배출량이 유의하게 감소하였다(P<0.05). 한편, 이산화탄소 발생량은 DW 처리구간에 차이가 없었다. 이러한 실험 결과, 생균제의 급여는 육계의 생산성과 장내 미생물의 변화에는 영향을 미치지 않았으나 음수로 급여시 혈중 콜레스테롤과 중성지방의 함량을 감소시켰고, 분내 암모니아 가스 발생량을 감소시키는 것으로 나타났다.

품종 및 질소시비수준이 수단그라스계 교잡종간의 생육단계별 질산염 함량에 미치는 영향 ( Effects of Variety and Nitrogen Fertilizer on Nitrate Content in Sorghum-Sudangrass Hybrids )

윤창,최기춘 한국초지조사료학회 1999 한국초지조사료학회지 Vol.19 No.2