한국산 대용화분의 화학성분 및 꿀벌 기호성 비교

장윤환(Yun Hwan Chiang),최광수(Kwang Soo Choi),조인호(In Ho Cho),신명재(Myong Jae Shin) 한국양봉학회 1991 韓國養蜂學會誌 Vol.6 No.1

상이한 수준의 비타민 D3 를 급여한 브로일러 병아리의 생물학적 , 생화학적 및 병리조직학적 소견 - 2. 혈액 , 간장 및 경골의 성상 -

장윤환(Yun Hwan Chiang),김중달(Jung Dal Kim),Michael F . Holick(Michael F . Holick) 한국영양사료학회 1997 韓國營養飼料學會誌 Vol.21 No.1

Identification of modal parameters from ambient vibration data using eigensystem realization algorithm with correlation technique

Dar-Yun Chiang,Chang-Sheng Lin 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.12

An effective identification method is developed for the determination of modal parameters of a structure based on the measured ambient response data. In this study, modification to Eigensystem Realization Algorithm with Data Correlation is proposed for modalparameter identification of structural systems subjected to stationary white-noise ambient vibration. By setting up a correlation -function matrix of stationary responses, as well as by introducing an appropriate matrix factorization, modal parameters of a system can be identified effectively through singular -value decomposition and eigenvalue analysis. Numerical simulations using practical excitation data confirm the validity and robustness of the proposed method in identifying modal parameters from stationary ambient vibration data under noisy conditions.

Identification of modal parameters from nonstationary ambient vibration data using the channel-expansion technique

Dar-Yun Chiang,Chang-Sheng Lin 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.5

The identification of modal parameters from the response data only is studied for structural systems under nonstationary ambient vibration. In a previous paper by the authors, the modal parameters of a system were identified using the correlation method in conjunction with the curve-fitting technique. This was done by working within the assumption that the ambient excitation is a nonstationary white noise in the form of a product model. In the present paper, the Ibrahim time-domain method (ITD) is extended for modal-parameter identification from the nonstationary ambient response data without any additional treatment of converting the original data into the form of free vibration. The ambient responses corresponding to various nonstationary inputs can be approximately expressed as a sum of exponential functions. In effect, the ITD method can be used in conjunction with the channel-expansion technique to identify the major modes of a structural system. To distinguish the structural modes from the non-structural modes, the concept of mode -shape coherence and confidence factor is employed. Numerical simulations, including one example of using the practical excitation data, confirm the validity and robustness of the proposed method for identification of modal parameters from the nonstationary ambient response.

칼슘 및 비타민 D3 수준이 브로이러 병아리의 증체 (增體) , 영양소 이용율 및 부전골 무기물에 미치는 영향

장윤환(Yun H . Chiang),이철희(Chul H . Lee) 한국축산학회 1984 한국축산학회지 Vol.26 No.2

This study was conducted to observe the effect of three calcium levels (0.7, 0.9 and 1.1%) and three vitamin D₃ levels (0, 200 and 400 IU/Kg) on body weight gain, nutrient utilization and mineral contents of metatarsus taken at 6 weeks of age in broiler chicks fed corn-Soya-fish meal diet. The 3 x 3 factorial experiment was carried out using 378 chicks of day-old Hubbard. The body weight gain of chicks fed 0.9% or 1.1% calcium was higher than that of birds fed 0.7% calcium after 6 weeks of experiment. When the supplementing level of vitamin D₃ increased the body weight gain increased, but not significantly. Feed intake figure was similar to the body weight gain. However, feed intake of chicks fed diet supplemented with 200 or 400 IU/Kg vitamin D₃ was higher than that of birds fed diet no vitamin D₃ added. A significant interaction between clacium and vitamin D₃ was recognized. The chicks fed diet supplemented with 200 or 400 IU/Kg vitamin D₃ showed more consumption of ration compared to the no vitamin D₃ block within 0.7% clacium group. But 200 IU/Kg treatment showed highest consumption within 0.9% calcium group, and birds for no addition of vitamin D₃ showed highest feed intake within 1.1% calcium group. The feed efficiencies, mortalities and incidences of weak legs of chicks fed diet containing different levels of calcium and vitamin D₃ were similar. The interactions between calcium and vitamin D₃ for those items were not recognized. In respect to the utilization efficiencies of dry matter, crude protein, ether extract and crude fiber there was no significant difference among treatments and no interaction between two factors was found. However, the significant difference among utilization efficiencies of nitrogen-free extract (NFE) for chicks fed different levels of calcium or vitamin D₃ was found. The efficiency of NFE increased as calcium level decreased, and that for chicks fed 400 IU/Kg vitamin D₃ was higher than that for birds fed 200 IU/Kg vitamin D₃. A significant interaction between calcium and vitamin D₃ was recognized respecting NFE utilization. There was no significant difference among utilization efficiencies of calcium, phosphorus, magnesium and potassium for chicks fed different calcium and vitamin D₃. However, the interaction between calcium and vitamin D₃ was recognized in respect to the utilizations of calcium and sodium. The contents of ash, phosphorus, potassium, zinc and copper in fat-free and dry metatarsus bone taken at the end of six weeks of experiment were not significantly different from each other on the basis of each composition. However, the significant differences were found in respect to the contents of calcium, magnesium, sodium and iron is metatarsus bone. There were significant interactions between calcium and vitamin D₃ concerning the contents of calcium, sodium and iron in the bone. Consequently, it was shown that chicks fed diet including 0.9% of calcium and 200 or 400 IU/Kg of vitamin D₃ performed best results among treatments.

옥수수 대두박 (大豆粕) 주체사료 급여시 칼슘 및 비타민 D3 수준이 브로일러 병아리의 증체 및 사료효율에 미치는 효과

장윤환(Yun H . Chiang),이철희(Chul H . Lee) 한국축산학회 1984 한국축산학회지 Vol.26 No.1

This study was conducted to determine the effect of three calcium levels (0.5, 0.9 and 1.3%) and three vitamin D₃ supplementation (0, 200, 400 IU/㎏) on body weight gain, feed consumption, and feed conversion of broiler chicks. Basal ration contained mainly corn and soybean meal. Since little amount of fish meal was added in basal diet, about 60% of arginine was included compared to the recommended level by N. R. C. (1977). The body weight gain of chicks fed diet containing 400 IU/㎏ vitamin D₃ for 3 weeks was higher than those of birds fed 0 or 200 IU/㎏ as 0.5% calcium was supplied. The 200 or 400 IU/-㎏ vitamin D₃ treatments were better than no supplementation one when 0.9 or 1.3% calcium was included in the diet. The mean body weight gain of chicks of 1.3% calcium treatment was highest among three levels of calcium, but not significantly different from that of 0.9% calcium treatment. The gain of birds fed 400 IU/㎏ vitamin D₃ was highest among three levels of vitamin D₃, but riot significantly different from 200 IU/㎏ treatment. The decreasing trend in requirement of vitamin D₃ was found when calcium level increased. However, the interaction between calcium and vitamin D₃ in respect to body weight gain was not recognized. The feed consumption data were similar to body weight gain data, whereas the interaction between calcium and vitamin D₃ was found. The feed conversion data also similar to those of body weight gain and feed consumption. The mortality and incidence of weak legs of chicks was not significantly different among treatments. However, a decreasing figure was shown when calcium or vitamin D₃ level increased. It was considered that since the little amount of fish meal (insufficient arginine) was included in diet the higher level of vitamin D₃ might be required For broilers compared to the recommended level by N. R. C. (1977).

Aflatoxin B1 과 Vitamin D3 급여가 Broiler 병아리의 증체 및 사료이용성에 미치는 영향

장윤환(Yun Hwan Chiang),여영수(Young Soo Yeoh) 한국축산학회 1989 한국축산학회지 Vol.31 No.4

This study was conducted to investigate the interaction of aflatoxin B₁ (AFB₁) and vitamin D₃ (VD₃) in broiler chicks. Three hundred thirty-six broiler chicks (Hubbard line) of equally mixed sex were allocated to triplicate 8(2x4 factorial) treatment groups. The 0 or 1 ppm of AFB₁ and 0, 500, 1000 or 1500 IU/㎏ of VD₃ were supplemented to the basal diet. Fourteen broilers of equally mixed sex were allocated to each replica and 24 groups were arranged in a randomized block design. After 3 weeks of feeding the body weight gain, feed intake, feed conversion, mortality, weak leg and runt chick were measured. 1. The body weight gain for 3 weeks presented no response to feeding AFB₁ except for slight decrease. However, that decreased according to the increasing level of VD₃ (p$lt; .01). 2. The feed intake also showed no response when fed I ppm AFB₁ except for slight increase. However, that decreased by feeding increasing level of VD₃ (P $lt; .01). 3. The feed conversion increased when fed 1 ppm AFB₁ (p $lt; .05), but no response to the amount of VD₃ in ration. 4. The motality, weak leg and runt chick were not affected by feeding AFB₁ and / or VD₃.

Aflatoxin과 비타민D₃給與가 브로일러 병아리의 增體, 營養素利用率, 脛骨無機物 및 血淸性狀에 미치는 影響

蔣潤煥,全珍錫,呂永壽 慶北大學校 1985 農業科學技術硏究所報 Vol.2 No.-

Aflatoxin과 비타민D₃의 相互作用을 究明하기 위하여 브로이러 병아리 336 首를 8區로 나누고 aflatoxin B₁을 0 또는 0.5ppm, 비타민D₃를 0, 500, 1,000 또는 1,500IU/Kg 給與하는 3週間의 2×4 要因試驗을 實施하였다. 增體量, 飼料攝取量, 飼料轉換率, 정강이 色相,斃死率 및 脚弱症發生率에 있어서 各區間 有意差를 나타내지 않았다. 乾物, 組蛋白質, 組脂肪, 可溶無室素物 및 組灰分의 利用率에 있어서 各 區間 有意差를 나타내지 않았다. 組織維의 利用率에 있어서 對照區에 比하여 aflatoxin 給與區가 매우 낮은 값을 보였다(P < .01). 그러나 비타민D₃가 添加水準間에는 有意差를 나타내지 않았으며 aflatoxin과 비타민D₃間의 交互作用도 認定되지 않았다. Ca, P 및 Na의 利用率에 있어서 各 區間 有意差를 보이지 않았으나 aflatoxin 給與區의 Ca 利用率이 無給與區보다 약간 높았다. 脫脂乾燥脛骨의 灰分含量은 各 處理間 有意差가 없었으나 Ca含量에 있어서도 aflatoxin 0.5ppm區에서 無給與區보다 더 많았으며(P < .05), 비타민D₃를 더 많이 給與할수록 조금씩 높게 나타났다. Aflatoxin과 비타민D₃가 脛骨內 Ca을 加速的으로 增加시킨다는 것을 보여 주었다(P < .01). 그리고 P의 含量에 있어서도 aflatoxin給與로 增加되었다(P < .05). 그러나 비타민D₃水準間에는 有意差가 없었으나 2要因間의 交互作用도 없었다. Aflatoxin給與는 Na含量에 影響을 주지 않았으나 비타민D₃水準間에는 有意差가 나타나(P < .01) 1,000IU/Kg水準이 가장 높게 나타났다. 2要因間의 交互作用은 認定되지 않았다. 血淸中의 Ca濃度에 있어서 aflatoxin給與區에서 매우 높게 나타났으며(P < .01), 有意性은 없었으나 비타민D₃添加水準이 높아질때 조금씩 增加되는 傾向을 보였다. 2要因間의 交互作用이 認定되었다(P < .05). P의 含量은 各 處理間에 有意差가 없었으며 Alkaline Phosphatase 力價에 있어서 aflatoxin給與區가 높은 값을 보였다(P < .01). 그리고 비타민D₃水準이 높아짐에 따라 조금씩 增加하는 趨勢를 보였으나 有意差는 없었으며 Aflatoxin과 비타민 D₃間에는 交互作用이 없었다. A 2×4 factorial study was carried out to investigate the interaction of aflatoxin and vitamin D₃in broiler chicks. The day-old 336 chicks were allocated to triplicate 8 treatments. The 0 or 0.5ppm of aflatoxin B₁(AFB) and 0, 500, 1,000 or 1,500 IU/Kg of vitamin D₃(VD) were supplemented to the basal diet. There were no significant differences among treatments in respect to the body weight gain, feed intake, feed conversion, shank color, mortality and incidence of weak legs. The utilization efficiencies of dry matter, crude protein, ether extract, N-free extract and crude ash showed also no significant differences among treatments, respectively. The mean utilization efficiency of crude fiber in AFB group was lower than that in normal group(P <.01). However, no significant difference was found among groups fed different levels of VD, and no interaction between AFB and VD was found. The utilization efficiency of Ca in AFB group was somewhat higher than that in normal group without statistical significance, and the similar values were found among groups fed different VD. The utilization efficiencies of P and Na were not significantly different among treatments, respectively. The tibia ash appeared to be similar among treatments fed different levels of AFB and VD. However, the Ca content in tibia of birds fed 0.5ppm of AFB was higher than that of normal chicks (P <.05). The slightly increasing trend was shown in Ca contents when fed increasing level of VD, and the interaction between AFB and VD was recognized(P <.01). The P content of tibia was increased by feeding AFB(P <.05). However, there was no significant difference among groups fed different level of VD and no interaction between AFB and VD in respect to the P content of tibia. Feeding AFB did not affect the Na content in tibia. However, there was a highly significant difference among groups fed different levels of VD(P <.01), the highest values were at 1,000 IU/Kg group, and the interaction between AFB and VD was not significant. The Ca content in serum of birds fed AFB was higher than in control group(P <.01). The Ca of serum increased when fed more VD, although no significance was found among groups, and there was an interaction between AFB and VD(P <.05). The P content of serum showed no significant difference among treatments. The alkaline phosphatase activity in serum of chicks fed AFB was higher than that of control group(P <.01). The enzyme activity increased slightly with increasing level of VD, however, there was no interaction between AFB and VD.

닭에 대한 칼슘 공급원별 효율에 관한 연구

장윤환 한국축산학회 1976 한국축산학회지 Vol.18 No.2

C14O2 의 흡수제로서 폐닐에칠아민과 하이아민베이스의 비교

장윤환 한국농화학회 1971 Applied Biological Chemistry (Appl Biol Chem) Vol.14 No.1

In order to compare their absorption abilities of carbon dioxide, Hyamine base and phenyl ethylamine were employed in wet combustion experiments. The known content of liver lipid and uniformly mixed palmitic acid-C^(14) were oxidized with sulfuric acid and phosphoric acid. Carbon dioxide produced was trapped by the amines tested through thin tube. The amines absorbed carbon dioxide were mixed with diotal scintillator and counted by liquid scintillation counter. The counting efficiencies and radioactivity recoveries were 50 to 60 % and nearly 100 % for both amines. However, the absorption ability of carbon dioxide by phenyl ethylamine was about two times that of Hyamine base. This technique would not be necessary for the counting of liver lipid of swim, because the efficiencies were not increased and counting accuracies were similar to those of direct counting.