Getting a Whiff of PittCon: Using gold and silver to understand metal gone bad     

Amato I 《Science (New York, N.Y.)》1991,251(5000):1431

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Please sir, $250 million more     

Amato I 《Science (New York, N.Y.)》1991,252(5014):1785

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Speculating in precious computronium     

Amato I 《Science (New York, N.Y.)》1991,253(5022):856-857

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Doing chemistry in the round     

Amato I 《Science (New York, N.Y.)》1991,254(5028):30-31

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What children know     

Bretherton I 《Science (New York, N.Y.)》1991,254(5030):446

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Influence of stocking density and layer age on production traits and egg quality in Japanese quail     

S. Nagarajan  D. Narahari  I. Alfred Jayaprasad  D. Thyagarajan 《British poultry science》1991,32(2):243-248

1. Japanese quail hens were housed from 6 to 26 weeks of age in cages providing areas of 150, 180, 210 and 240 cm²/bird.

2. Body weight gain, age at 50% egg production, mortality, hen‐day egg production and food conversion values showed significant improvement with proportionate increase in cage space per layer.

3. Egg weight gradually increased with age but shell thickness was influenced neither by age of the hen nor by stocking density.

4. Yolk index and colour were superior in the lowest stocking density (more cage space) group; other egg quality traits and egg weight were not influenced by stocking density.

5. The albumen index, internal quality unit, yolk index and yolk colour values increased with age.  相似文献   

Diagnosis of equine stifle joint disorders: three cases          下载免费PDF全文

Desjardins MR  Hurtig MB 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(9):543-550

The clinical, radiographic, arthrographic, arthroscopic, and pathological findings of three horses with femorotibial joint injuries are presented. Overall diagnostic accuracy is improved when clinical signs, arthrography, and arthroscopy are combined. Treatment of these injuries remains limited. One horse was euthanized, and two were treated by stall rest after diagnosis. Of the two surviving horses, one became a successful breeding animal, and the other was unable to perform as a pleasure horse.  相似文献   

Polymers     

Brauman JI 《Science (New York, N.Y.)》1991,251(4996):853

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Three cases of disputed paternity in dogs resolved by the use of DNA fingerprinting     

Hermans IF  Atkinson J  Hamilton JF  Chambers GK 《New Zealand veterinary journal》1991,39(2):61-64

DNA fingerprinting with the probes 33.15 and alpha-globin 3'HVR has been used to resolve three cases of disputed paternity in dogs. For each pedigree it was necessary to establish which bands in the DNA fingerprints of the offspring were of paternal origin, and then establish which putative sire carried all these bands. In the first case, a litter of Rhodesian Ridgebacks, twelve DNA bands were informative in establishing paternity. In the second case, a litter of Afghan hounds, five DNA bands established paternity, Lastly, in a litter of Border collies, five DNA bands established paternity. In each case a single dog only sired the entire litter.  相似文献   

A case-control study of Nocardia mastitis in Nova Scotia dairy herds   总被引：1，自引：0，他引：1       下载免费PDF全文

Ferns L  Dohoo I  Donald A 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(11):673-677

A case-control study was conducted to identify herd production, housing, and hygienic and therapeutic factors associated with a diagnosis of Nocardia mastitis in dairy herds in Nova Scotia. The data were collected by on-farm interviews with owners of 54 case and 54 control herds.

Logistic regression was used to study risk factors. The use of dry cow products containing neomycin, including two specific dry cow products, was strongly associated with a diagnosis of Nocardia mastitis in a herd. Other factors which increased the risk of Nocardia mastitis were higher levels of production, larger herd size, and a large percentage of cows treated with dry cow products. These results are compared to results from a similar study carried out in Ontario.

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