• Asian-Australasian Journal of Animal Sciences
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• 제18권2호
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• pp.241-248
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• 2005

This study is aimed at understanding the role of arsenic in Roxarsone in causing fatty livers in mule ducks. One hundred 10-week-old mule ducks were randomly divided into 5 groups. Ducks received 2 weeks of various treatments followed by 2 weeks of withdrawal. The treatments were non-treatment (control), 300 mg/kg Roxarsone inclusion for 2 weeks ($1^{st}$ and $2^{nd}$ week), Roxarsone inclusion for one week ($2^{nd}$ week only), restrict feeding, or Roxarsone analogue (3-nitro-4-hydroxyphenyl acid) inclusion. Results showed that feed intake and body weight in the Roxarsone groups and the restrict feeding group decreased significantly during the treatment period. However only the liver and heart weights were significantly decreased (p<0.05) in the restrict feeding group. Fatty acid synthetase (FAS) activity showed a significant decrease (p<0.05) in the Roxarsone groups and the restrict feeding group, two-week-Roxarsone treatment significantly increased NADP-malic dehydrogenase (MDH) activity compared to the restrict (p<0.05). After 2 weeks drug withdrawal, the 1-week-Roxarsone or restrict feeding group showed significantly increased (p<0.05) glucose-6-phosphate dehydrogenase (G-6-PDH) activity (p<0.05). Two-week-Roxarsone treatment significantly decreased (p<0.05) the high density lipoprotein (HDL) and increased (p<0.05) the low density lipoprotein (LDL) and very low density lipoprotein (VLDL) ratio. After drug withdrawal, the 1-week-Roxarsone or restrict feeding group showed significantly increased (p<0.05) creatine kinase (CK) activity. The 2-week-Roxarsone treatment group showed significantly increased (p<0.05) aspartate aminotransferase (AST) activity. The restrict feeding treatment group showed significantly decreased (p<0.05) total protein (TP) concentration. After drug withdrawal, the related enzyme activities in the blood that reflected the liver function were restored to the normal physiological range, except for the total bilirubin concentration and CK activity in the 1-week-Roxarsone group. This group showed a significant increase (p<0.05). Thus, the reasons for liver enlargement in the Roxarsone and restrict feeding groups were different.

• 한국추진공학회지
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• 제7권4호
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• pp.10-18
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• 2003

본 연구에서는 기존 연구에서 사용된 PSD 성능 시험 장치를 살펴보았다. 성능 시험 장치는 공급관 전체 가진 방식과 작동 유체 가진 방식으로 구분할 수 있다. 작동유체 가진 방식은 다시 피스톤 방식과 면적제한 방식으로 분류할 수 있다. 면적 제한 방식이 기초 연구에 알맞으며, 제작된 실험장치의 구성품을 제시하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제9권1호
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• pp.63-67
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• 1996

An experiment was conducted to compare the effects of early feed restriction on the performance and abdominal fat deposition in broilers. The treatments consisted of providing feed ad libitum (Full-fed) and three feed restriction treatments of restricting feeding between 8-21 days of age (DOA) either for a duration of 7 days or 14 days. The three feed restriction treatments were Restrict 8-14 DOA, Restrict 8-21 DOA and Restrict 15-21 DOA. Live weights and feed consumption were obtained at weekly intervals. Samples of both male and female broilers were taken at 43 DOA to determine the weight of abdominal fat, liver and gizzards. Feed efficiency was generally improved by feed restriction, but a compensatory gain was not observed in the restricted groups. Broilers on restricted feeding also had lower mortality as compared to the full-fed broilers. There is no effect of early feed restriction on the weight of the abdominal fat and the dressing percentages but the weights of the liver and gizzard were affected by restriction. Also there was an effect of sex on the weights of the abdominal fat, the liver and gizzard of the males and females.

• Asian-Australasian Journal of Animal Sciences
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• 제20권2호
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• pp.295-306
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• 2007

The growth and health of the fetus and neonate are directly influenced by the nutritional and physiological status of sows. Sows are often under catabolic conditions due to restrict feeding program during pregnancy and low voluntary feed intake during lactation. The current restrict feeding program, which aims at controlling energy intake during gestation, results in an inadequate supply of dietary protein for fetal and mammary gland growth. Low voluntary feed intake during lactation also causes massive maternal tissue mobilization. Provision of amino acids and fatty acids with specific functions may enhance the performance of pregnant and lactating sows by modulating key metabolic pathways. These nutrients include arginine, branched-chain amino acids, glutamine, tryptophan, proline, conjugated linoleic acids, docosahexaenoic acid, and eicosapentaenoic acid, which can enhance conception rates, embryogenesis, blood flow, antioxidant activity, appetite, translation initiation for protein synthesis, immune cell proliferation, and intestinal development. The outcome is to improve sow reproductive performance as well as fetal and neonatal growth and health. Dietary supplementation with functional amino acids and fatty acids holds great promise in optimizing nutrition, health, and production performance of sows and piglets. (Supported by funds from Texas Tech, USDA, NLRI-RDA-Korea, and China NSF).

• 항공우주기술
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• 제5권2호
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• pp.181-187
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• 2006

본 연구에서는 PSD (POGO 억제장치) 성능 시험을 위해 구축한 시험설비에 대한 내용을 다룬다. PSD 성능 시험 장치는 공급관 전체 가진 방식과 작동 유체 가진 방식으로 구분할 수 있으며, 작동유체 가진 방식은 다시 피스톤 방식과 면적제한 방식으로 분류할 수 있다. 면적 제한 방식 가진기가 기초 연구에 적합하며, 이를 채택한 PSD 성능시험장치를 제시하였다. 가진기로는 삼각함수 형태의 섭동을 줄 수 있는 판형 가진기와 볼 밸브형 가진기가 고려되었으며, 누수 문제를 고려하여 볼 밸브형 가진기가 채택되었다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2003년도 제20회 춘계학술대회 논문집
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• pp.119-122
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• 2003

In this Study, the types of PSD performance test systems were reviewed. And as a results of that reviewing process, a suitable PSD performance test system type for PSD design was proposed. PSD performance test systems can be classified with pulsating methods - the pulsating whole feeding system and the pulsating working fluid. The pulsating working fluid method can be re-classified with the devices of pulsating working fluid - a piston-type pulsator and a restrict-type pulsator. The pulsating-working-fluid performance test system with restrict-type pulsator was proposed to be a suitable type for identification of main-design-parameters.

• 한국가금학회지
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• 제46권1호
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• pp.1-10
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• 2019

닭의 성장과정에서 어린 병아리의 발달에 가장 결정적인 시간으로 인식되는 시점은 부화 전 수일부터 부화 후 수일간이다. 부화 전후의 충분한 영양소 공급은 배아의 최종 발달과 병아리의 초기성장에 결정적 기여를 한다고 볼 수 있다. In ovo feeding에 의한 탄수화물 또는 아미노산의 공급은 부화 전 후의 소화장기 발달에 긍정적으로 작용한다. Prebiotics과 synbiotics 등에 대한 in ovo 주입은 건강한 미생물 균총 형성 등을 제공하여 영양적, 면역적 측면에서 좋은 결과들을 볼 수 있지만, 연구 결과의 수적 제한과 in ovo 주입의 양과 주입 부위 및 주입시기 등에 대한 추가적인 연구가 요구된다. 탄수화물을 이용한 in ovo feeding은 부화시 체중 증가를 보이지만 육계의 부화 후 능력에는 크게 영향을 보이지 않으며, 탄수화물 주입에 따른 부화율 감소는 기술적 요인(최적 농도, 주입 장소, 부피 등)이 크게 작용하는 것으로 보인다. In ovo feeding에 의한 아미노산 공급은 병아리의 세포성 면역과 체액성 면역을 높여 초기 면역 향상에 도움이 되는 것으로 판단된다. In ovo feeding은 부화 전후의 최적의 영양소 공급과 면역력 증진 및 절식에 따른 병아리의 스트레스를 완화시켜주는 실용적인 기술이 될 수 있다.

• Journal of Nutrition and Health
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• 제2권4호
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• pp.155-165
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• 1969

This experiment was conducted from the latter part of June through the first part of October 1969 by picking up 30 among the patients hospitalized at the department of internal medicine of the Seoul National University Hospital, who were under low sodium diet fording. By applying 1,000mg sodium diet that the author invented for feeding, the result of measurement made daily on 24 hours urine sodium shows an average of 58.1 mEq/L (average 76.799mEq/24hr). The sodium restrict diet menu (Table 4 and Table 5) was made due to table for food exchange list by American Heart Association and especially the 3 and 4, sample meal plan was applicable to that of Korean.

• 한국식품영양학회지
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• 제2권1호
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• pp.73-83
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• 1989

The objective of this study was to propse the way that could enlarge the course In life for the graduates of Department of Food and Nutrition in Junior College. This study was carried out through the analysis of statistical data and questionnaires gathered from professors of Department of Food and Nutrition in Junior College and from dieticians of industry, school and hospital. The results of this study could be summarized as follows. 1. The cultivation number of dieticians is too excessive in comparison with the need, and so It is necessary for the colleges to restrict the row establishment of Department of Food and Nutrition for a time, and for the government to tighten the employment system of dieticians. 2. The employment of dieticians will be extended to such fields as school, hospital public health center and counsel office of nutrition to act as a nutritional educator or a medical server in the future, and consequently the colleges which cultivate dieticians should improve the curriculum to agree with this. 3. It is necessary for the government to renovate the system of dietician arrangement to such a way as establishes a new rule in which additional dietician Should be employed In accordance with the feeding number in industry and hospital, as restricts the position-combine of a dietician with a cook in a large feeding institute, as gives the qualification of a nutritional instructor only to the diatician at public health center, as gives the qualification of a nutrition -teacher to the dieticians who completed the course of study for the teaching profession and then allows them to act as a nutrition-teacher in school. 4. The way to give a higher grade of educational opportunity should be given to the graduates of Department of Food and Nutrition in Junior College for the supplement of dietician's faculty.

• 농업과학연구
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• 제46권3호
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• pp.591-599
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• 2019

The study was conducted to investigate the growth performance of two strains of Korean domestic chickens (KDC, i.e., 1A, and 2A). A total of 600, one-day-old female chicks were allocated in a completely randomized design to give 15 replicates for each strain (10 birds per pen). The chickens were fed (week 0 to 6: ad libitum; week 6 to 12: restricted feeding) commercial diets (week 0 to 5: crude protein 20.3% and metabolizable energy 3,059 kcal/kg; week 5 to 8: crude protein 18.6% and metabolizable energy 3,123 kcal/kg, and week 8 to 12: crude protein 16.7% and metabolizable energy 3,187 kcal/kg) together with fresh water. Body weight (BW) and feed intake were measured bi-weekly to calculate the average daily feed intake (ADFI), average daily gain (ADG), and subsequently the feed conversion ratio (FCR). The results indicate that the 1A crossbreed had a higher (p < 0.05) BW compared to the 2A crossbreed from week 6 to 10. A higher ADG (p < 0.05) was seen in the 1A crossbreed on week 6 and in the 2A crossbreed on week 8. Moreover, no difference (p > 0.05) was observed in the FCR between crossbreed 1A and 2A during the 12 weeks with the exception of week 8. Crossbreed 1A had (p < 0.05) an improved FCR compared to the 2A crossbreed on week 8. In conclusion, the 1A crossbreed had a higher growth performance compared to the 2A crossbreed for 12 weeks after hatching. This data can contribute by helping the KDC market.