사료 내 뽕잎 분말 첨가 급여가 육계의 도체특성 및 계육의 육색에 미치는 영향

박창일,김영직,Park, Chang-Ill,Kim, Young-Jik 한국축산식품학회 2012 한국축산식품학회지 Vol.32 No.6

본 시험은 육계에 뽕잎 분말의 급여량에 따라(0, 1%, 2% 및 3%) 5주간 사육한 육계의 생산성과 육계의 도체특성, 혈액성상 및 육색을 조사하였다. 실험구는 뽕잎 분말을 첨가 급여하지 않은 처리구를 대조구, 뽕잎 분말 1% 급여구는 T1, 뽕잎 분말 2% 급여구는 T2 그리고 뽕잎 분말 3% 급여구를 T3 등 4개 처리구로 나누어 실시하였다. 육계의 생산성은 처리구간 유의적인 변화는 없었다. 도체특성 중 도체중, 도체율, 근위, 맹장, 심장 및 복강지방 무게는 처리구간에 유의성이 없었고, 간의 무게는 대조구와 T1 및 T2는 비슷하지만 T3에서 다소 가벼운 결과이었다(p<0.05). 육계의 혈액 성상 중 HDL-cholesterol과 glucose 및 albumin은 뽕잎 급여구에서 높았고, 총 콜레스테롤과 LDL-cholesterol은 낮아지는 결과로(p<0.05) 뽕잎을 3%이상 급여할 경우 유의한 변화를 보였다. 뽕잎 분말을 3% 급여한 계육의 $L^*$값과 $a^*$값은 증가하여 육색이 어두워지는 경향이었고, $b^*$값은 처리구간에 특이한 변화가 없었다. 결론적으로 뽕잎 분말을 3% 이상 급여하면 총콜레스테롤, LDL-cholesterol이 감소하며, HDL-cholesterol이 증가함으로 혈액성상을 개선할 가능성이 있는 것으로 판단된다. This study was conducted in order to investigate the effects of supplementation diets of mulberry leaves powder on performance, carcass characteristics, blood characteristics, and meat color of chicken meat. Broiler chicks were fed diets containing 0% mulberry leaves powder (Control), 1% mulberry leaves powder (T1), 2% mulberry leaves powder (T2), and 3% mulberry leaves powder (T3) for five weeks. The weight gain, feed intake, and feed conversion were no significant difference among treatment groups. The carcass weight, carcass ratio, gizzard, cecum, heart, and abdominal fat weight were not significantly different. The liver weight significantly decreased by the supplementation of mulberry leaves powder compared to the control (p<0.05). The total cholesterol and LDL-cholesterol concentration of the control were higher than T3, but the HDL-cholesterol concentration, glucose, and albumin of the control were lower than those of the treatment groups (p<0.05). However, there were no significant difference in GPT and triglyceride concentration among treatments. In meat color, the CIE $L^*$ and $a^*$ value of treatment groups (T3) showed significantly higher value compared to the control, however, no difference in the CIE $b^*$ values was observed among treatment groups. In conclusion, these data indicate that 3% mulberry leaves powder supplementation was most effective in decreasing the total cholesterol and LDL-cholesterol as well as increasing the HDL-cholesterol, glucose, and albumin concentration.

쑥과 어유의 첨가가 계육의 육질에 미치는 영향

박창일,김영직,Park Chang-Ill,Kim Young-Jik 한국축산식품학회 2004 한국축산식품학회지 Vol.24 No.3

본 연구는 쑥 3%, 정어리유 4%와 쑥 3% + 정어리유 4%를 5주간 급여한 후 도계하여 가슴살 부위와 다리살 부위를 냉장온도 (4$\pm$1)$^{\circ}C$에 15일간 저장하면서 육질에 미치는 영향을 연구하였다. pH는 저장기간이 경과하면서 전 처리구에서 증가하였고, 다리살 부위가 가슴살 부위보다 약간 높은 경향이었다. VBN과 가열 감량은 저장기간의 경과에 따라 증가하였으며 (p<0.05), 처리구간에는 특이한 변화가 없었다. 육색은 저장기간이 경과하면서 L*값이 증가하였으나(p<0.05) a* b*값은 변화가 없었다. This study was conducted to investigate the influence of dietary mugwort and fish oil on meat quality of chicken. Broilers were randomly assigned to one of four dietary treatments: 1) Control (commercial feed) 2) T1(commercial feed supplemented with 3% mugwort) 3) T2 (commercial feed with 4% fish oil) and 4) T3 (commercial feed with 3% mugwort and 4% fish oil). They were fed the experimental diets for five weeks and slaughtered. After that, the meat samples were vacuum packaged and stored at 4$\pm$1$^{\circ}C$. The meat quality were analyzed for meat samples stored over a period of 0, 5, 10 and 15 days. The pH of all treatments significantly increased during the storage periods(p<0.05). The pH of the thigh was rather higher than that of the breast. The VBN (volatile basic nitrogen) and cooking loss significantly increased during the storage periods (p<0.05). However, the VBN was not significantly different between control and treatment groups. The meat color (b*) significantly increased during storage periods.

쑥 분말의 급여가 계육의 저장기간 중 VBN, TBARS 및 지방산 조성에 미치는 영향

박창일,김영직,Park, Chang-Ill,Kim, Young-Jik 한국축산식품학회 2008 한국축산식품학회지 Vol.28 No.4

The goal of this study was to investigate the effects of dietary mugwort on the proximate composition, volatile basic nitrogen (VBN), thiobarbituric acid reactive substance (TBARS) and fatty acid in chicken meats. One hundred sixty broiler chicks (1 d old) were assigned to one or four dietary groups: Control; commercial feed supplemented with 1% mugwort (T1); commercial feed with 3% mugwort (T2) and commercial feed with 5% mugwort (T3). After 42 d, broilers from each group were slaughtered and meat samples were vacuum packaged and stored at $4{\pm}1^{\circ}C$ over a period of 0, 1,2,3, and 4 wk. Chicken breast was not influenced by all treatments in moisture, crude protein and crude fiber, while crude fat was lowered (p<0.05) in chickens fed with the T2 and T3 diets compared to the control and T1 diets. All treatments with mugwort diets tended to have decreased VBN values for chicken breast and thigh compared to control. As storage time increased, VBN was increased for all chickens (p<0.05). No significant differences in TBARS were observed among all treatments at 0 wk. TBARS values were reduced with the T2 and T3 diets and initially increased from 0 through 3 wk, then abruptly decreased at 4 wk. Dietary mugwort supplementation resulted in increased stearic acid (excepted T2) and oleic acid and decreased linoleic acid. Stearic acid in thigh meat was decreased in the T1, T2 and T3, however linoleic acid levels tended to increase with mugwort powder supplementation. It is concluded that dietary mugwort has a positive effect on increasing unsaturated fatty acid contents and decreasing saturated fatty acids.

볼나사 너트부의 부하분포와 강성에 관한 연구

박창일(Chang-Il Park),정성종(Sung-Chong Chung) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-

Ball screws are widely used in precision machinery. Positioning accuracy of precision machines depends upon stiffness of ballscrews and lead errors of the ball screw mechanism. The lead errors are controlled by proper selection of ball screw grade according to the design requirement. By the way, the stiffness is composed of the nut, screw shaft, nut bracket, and support bearing stiffnesses. As the nut stiffness are function of ball, grooves, contact mechanism, preload and loading conditions, it is difficult to estimate the nut stiffness in the design process of precision machinery. In this paper, to make a nut stiffness estimator applicable to design of precision machinery, load distribution analysis including Hertzian contact deformation and manufacturing errors is studied for various load and assembly conditions. It is confirmed that developed explicit stiffness model is applicable to predict positioning accuracy of ball screw mechanisms through case studies.

선형계획법을 통한 지역간 유통권 편성의 소고

박창일(Park Chong Il) 한국지역사회발전학회 1987 地域社會開發硏究 Vol.12 No.1

N/A

뽕잎과 민들레 추출물 급여가 육계의 생산성 및 혈액성상에 미치는 영향

박창일(Chang Ill Park),손중천(Joong Cheon Shon),김영직(Young Jik Kim) 韓國家禽學會 2010 韓國家禽學會誌 Vol.37 No.2

본 시험은 육계에 뽕잎과 민들레 추출물을 각각 1%와 2%를 급여하여 5주간 사육한 육계의 생산성과 계육의 일반성분, 가열 감량, 육즙 손실 및 혈액성상을 조사하였다. 실험구는 뽕잎과 민들레 추출물을 급여하지 않은 대조구, 뽕잎 추출물 1% 급여구는 T1, 뽕잎 추출물 2% 급여구는 T2, 민들레 추출물 1% 급여구는 T3 그리고 민들레 추출물 2% 급여구를 T4 등 5개 처리구로 나누어 4주간 냉장 온도(4±1℃)에서 저장하면서 실험하였다. 육계의 증체량 및 사료 요구율은 T2가 유의적으로 높았다. 가열 감량은 저장 기간이 경과하면서 증가하였고, 처리구간에는 유의성이 없었다. 육즙 손실은 저장기간이 지남에 따라 증가하였으며, 뽕잎과 민들레 추출물의 급여는 육즙 손실이 감소되는 경향이나 유의성은 없었다(P>0.05). 혈액 조성 중 GOT, GPT, 총콜레스테롤은 뽕잎과 민들레 추출물 급여구에서 낮아지고, 특히 민들레 추출물 2%급여구에서(T4) 유의적으로 감소하였다(P<0.05). HDL-cholesterol은 대조구보다 T1, T2, T3 및 T4에서 증가하고, 특히 T3와 T4에서 유의적으로 증가하였다(P<0.05). LDL-cholesterol은 처리구간에 유의성이 없었다. 중성지방은 대조구와 T1 및 T3는 유의적인 변화가 없었으며, T2와 T4에서 유의성 있게 낮아졌다(P<0.05). 결론적으로 민들레 추출물 2% 급여는 총콜레스테롤, 중성지방을 감소시키고, HDL-cholesterol을 증가 시킴으로 혈액 조성을 개선할 가능성이 있는 것으로 판단된다. This study was conducted to investigate the effects of dietary supplementation of mulberry leaves and dandelion extracts on performance, proximate composition, heating loss, drip loss, and blood characteristics of chickens. One hundred sixty broiler chicks were fed diets for five weeks containing 1% mulberry leaves extracts (T1), 2% mulberry leaves extracts (T2), 1% dandelion extracts (T3), and 2% dandelion extracts (T4). At the end of five week feeding experiment, broiler were slaughtered, and stored at 4℃. T2 resulted in much better weight gain and feed conversion than other treatment groups. As storage time increased, all treatment groups resulted in increased heating loss and drip loss (P<0.05) but no significant difference were observed among the treatment groups. In blood composition, GOT (glutamic oxaloacetate transaminase), GPT (glutamic pyrubic transaminase), total cholesterol, and triglyceride were significantly decreased by the supplementation of mulberry leaves and dandelion extracts compared to the control (P<0.05). Especially, T4 was significantly (P<0.05) more effective in improving blood composition compared to other treatment groups. However, no significant difference (P>0.05) were found in LDL-cholesterol among all treatment groups. In conclusion, these data indicate that compared to other treatments, supplementation of 2% dandelion extracts (T4) were most effective in decreasing total cholesterol and triglyceride and increasing HDL-cholesterol.

FH 대역확산통신이 TV채널에 미치는 간섭 연구

박창일(C.I.Park),김한종(H.J.Kim),조형래(H.R.Cho),이명수(M.S.Rhee),강창언(C.E.Kang) 한국통신학회 1988 한국통신학회 학술대회논문집 Vol.1988 No.11

뽕잎과 민들레 추출물을 급여한 계육의 저장성에 미치는 영향

박창일(Chang Il Park),김영직(Young Jik Kim) 韓國家禽學會 2010 韓國家禽學會誌 Vol.37 No.4

본 시험은 육계에 뽕잎과 민들레 추출물을 각각 1%와 2%를 급여하여 5주간 사육한 계육의 pH, 육색, TBARS 및 VBN을 조사하였다. 실험구는 뽕잎과 민들레 추출물을 급여하지 않은 대조구, 뽕잎 추출물 1% 급여구는 T1, 뽕잎 추출물 2% 급여구는 T2, 민들레 추출물 1% 급여구는 T3 그리고 민들레 추출물 2% 급여구를 T4 등 5개 처리구로 나누어 사육한 후 도계하여 4주간 냉장 온도(4±1℃)에서 저장하면서 실험하였다. 계육의 pH는 저장 기간이 경과하면서 감소하였고(P<0.05), 대조구에 비해 뽕잎과 민들레 추출물 급여구에서 낮았으며, 특히 민들레 2% 급여구인 T4에서 가장 낮았다(P<0.05). 가슴살의 육색 중 L<SUP>*</SUP>값과 a<SUP>*</SUP>값은 저장 기간이 지남에 따라 일정한 변화가 없었고 b<SUP>*</SUP>값은 증가하였으며, 다리살의 L<SUP>*</SUP>값은 감소하였고, a<SUP>*</SUP>값은 증가하였다. TBARS는 저장 기간이 지나면서 모든 처리구에서 증가하였고(P<0.05), 가슴살과 다리살에서 대조구보다 뽕잎과 민들레 추출물 급여구에서 낮았으며, 뽕잎과 민들레 추출물 급여에 의한 차이는 없었다. VBN 함량은 계육을 저장하는 동안 증가하였고, 대조구에 비해 뽕잎과 민들레 추출물 급여구에서 낮았으며(P<0.05), 뽕잎과 민들레 추출물 급여에 의한 차이는 없었다. 이상의 결과를 종합적으로 고찰해 보면 뽕잎과 민들레 추출물을 계육에 급여하면 pH, TBARS 및 VBN 함량이 낮아져 계육의 저장성 개선에 도움이 되리라 사료된다. This study was conducted to investigate the effects of dietary supplementation of mulberry leaves and dandelion extracts on pH, meat color, TBARS (thiobarbituric acid reactive substance), and VBN (volatile basic nitrogen). Two hundred broiler chickens were fed diets for five weeks containing 1% mulberry leaves extracts (T1), 2% mulberry leaves extracts (T2), 1% dandelion extracts (T3), and 2% dandelion extracts (T4). At the end of five weeks feeding experiment, broilers were slaughtered, and stored at 4℃ for five weeks. As storage time increased, the presence of mulberry leaves and dandelion extracts resulted in decreased pH, and L<SUP>*</SUP> and increased TBARS, VBN, and a<SUP>*</SUP> value in all treatment groups (P<0.05). The pH value, TBARS, and VBN were significantly decreased by the supplementation of mulberry leaves and dandelion extracts relative to the control (P<0.05). Therefore, mulberry leaves and dandelion extracts had the possibility to improve shelf life of chicken meat. Especially, T4 was significantly more effective in delay lipid oxidation compared to the control group. However, no significantly difference was found in pH, TBARS, and VBN among mulberry leaves and dandelion extracts treatment groups. In conclusion, this study demonstrates that compared to control group, supplementation of mulberry leaves and dandelion extracts were effective in decreasing pH, TBARS, and VBN and increasing a<SUP>*</SUP> value.

트위터스피커 커버그릴의 구멍크기에 따른 음향특성에 관한 연구

박창일(Changil Park),박소현(Sohyun Park),김재운(Jaewon Kim) 한국자동차공학회 2021 한국자동차공학회 학술대회 및 전시회 Vol.2021 No.11

FE를 기반한 트랙터 앞차축 강도평가에 대한 연구

박창일(Chang-Il Park),황지혜(Ji-Hae Hwang),최종재(Jong-Jae Choi),박지수(Ji-Su Park) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11