Protein synthesis measured in the whole body of chick embryos cultured in vitro     

K. Kita  S. Nakagawa  R. Pinontoan  J. Okumura  T. Muramatsu 《British poultry science》1993,34(5):1043-1047

1. Whole body protein synthesis was measured in chick embryos cultured in vitro. On day 7 of incubation chick embryos were cultured for 60 min in synthetic serum‐free medium containing 4‐[³H]phenylalanine. Specific radioactivities in free and protein‐bound phenylaline in the whole embryo were measured, starting 2 min after commencement of the culture process.

2. The values for fractional synthesis rate (FSR) estimated in vitro at 20, 30, 45 and 60 min during the embryo culture agreed well, ranging from 35 to 40%/d, suggesting that the method would serve as a useful model for studying the effect of growth promoters in chick embryos.

3. Bovine insulin in the synthetic medium did not affect FSR of protein in chick embryos cultured in vitro.  相似文献   

Monitoring pregnancy losses in small dairy herds     

Lemire GE  Stalheim PS  Lemire MR  Tiemann M  Verdon L 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(1):33-35

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Does veterinary dermatology interest you?     

Schroeder SW 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(8):456

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Metastatic chondrosarcoma and subcutaneous granulomas in a grey rat snake (Elaphe obsoleta obsoleta)          下载免费PDF全文

Honour SM  Ayroud M  Wheler C 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(4):238-240

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Food intake adjustments of chicks: Short term reactions of genetic stocks to deficiencies in lysine,methionine or tryptophan     

D. O. Noble  M. L. Picard  E. A. Dunnington  G. Uzu  A. S. Larsen  P. B. Siegel 《British poultry science》1993,34(4):725-735

1. Growth, food intake, and food preference were measured in two experimental lines (White Rocks and White Leghorns) of chickens fed diets varying in content of lysine, methionine, or tryptophan. Diet A was balanced in all amino acids, while the remaining 6 diets were moderately ( ～ 30%) or slightly ( ～ 15%) deficient in either lysine, methionine, or tryptophan relative to NRC recommendations for broiler diets.

2. Body weight and food utilisation efficiency of White Leghorns at 10 d of age were not affected by diet, whereas the lower concentrations of lysine and methionine depressed these traits in White Rocks.

3. Tryptophan deficiency reduced food intake of White Leghorns, but not White Rocks.

4. With choice feeding of balanced and deficient diets from day 10 to 16, preferences between the diets were minimal for White Leghorns, whereas for White Rocks there was an almost immediate preference for the balanced diet, followed by lack of preference or preference for the deficient diet.

5. Apparently for some genetic stocks there is rapid adjustment to deficiencies in these amino acids with overconsumption, followed by compensation for preference of the balanced diet. The response, however, will vary depending on the deficient amino acid.  相似文献   

Data on the web?     

Ballard JW 《Science (New York, N.Y.)》1995,270(5233):13d-14d

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Universities are our responsibility   总被引：1，自引：0，他引：1  

Danforth WH 《Science (New York, N.Y.)》1995,269(5231):1651

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State department lifeline to be cut     

Illigan S 《Science (New York, N.Y.)》1995,268(5218):1690

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Funding reform fights on against researchers' apathy     

Biggin S 《Science (New York, N.Y.)》1995,268(5219):1843

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Effect of planting density of maize on the progress and spread of northern leaf blight fromExserohilum turcicum infested residue source     

E. Adipala  J. P. Takan  M. W. Ogenga-Latigo 《European journal of plant pathology / European Foundation for Plant Pathology》1995,101(1):25-33

Effect of plant density (37,037, 44,444 and 55,555 plants/ha) on the increase of northern leaf blight in time and space on two maize cultivars planted at spacings of 90, 75 and 60 between rows and 30 cm within rows was investigated.Exserohilum turcicum infested maize residue was used as an inoculum source. Maize density did not significantly affect the disease indices, but significantly influenced the grain yield of the two cultivars. In contrast, the two cultivars differed significantly (P0.01) in disease severity, but not grain yield. Higher disease severities and grain yields were associated with higher plant densities, whereas the apparent infection rate was lower in higher plant density. Distance from the maize residue (inoculum source) significantly influenced disease severity. The percentage leaf area blighted, area under disease progress curve and disease progress curve intercept decreased with distance from the maize residue area, but the apparent infection rate on EV8429-SR appeared to increase with distance. Disease gradients (b) were higher in closely planted maize and flattened with time in one location only.  相似文献