Transforming genes: oncogenes, genes, and growth factors     

Ihle JN 《Science (New York, N.Y.)》1987,237(4818):1060-1061

  相似文献   

Behavioral ecology: ecological aspects of social evolution     

Austad SN 《Science (New York, N.Y.)》1987,236(4800):470

  相似文献   

Response of egg weight to the inclusion of various fats in layer diets     

R. H. Scragg  N. B. Logan  N. Geddes 《British poultry science》1987,28(1):15-21

1. Brown egg layers were fed diets differing in oil content, oil source and linoleic acid concentration and the effect on performance from 22 to 69 weeks of age was studied.

2. The birds responded with an increasing mean egg weight up to a linoleic acid intake of 2.75 g/bird d.

3. Increasing the intake of readily absorbable oil without increasing linoleic acid concentration did not increase mean egg weight.  相似文献   

Shapiro to leave michigan for princeton     

N C 《Science (New York, N.Y.)》1987,236(4802):665

  相似文献   

X chromosome mosaicism and infertility in a mare          下载免费PDF全文

Reid SW  Weatherston JF  Robinson BN 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):533-534

  相似文献   

Interrelationships among Production and Clinical Disease in Dairy Cattle: A Review   总被引：1，自引：0，他引：1       下载免费PDF全文

Erb HN 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(6):326-329

Epidemiological evidence is presented in order to answer two questions. The first question is: “Does high milk production put a cow at increased risk of disease?” The answer to this question seems to be “maybe” for milk fever, but “no” for most other common diseases (veterinary-assisted dystocia, retained placenta, metritis, cystic ovary, ketosis, left displaced abomasum, and mastitis). The second question is: “Is low milk production a consequence of disease?” For most diseases the answer is a cautious “yes”.  相似文献   

Dynamics of chlorinated pesticide residues in long-term storage of canned food     

J Garcár  J Hrusovsky  M Smirják 《Veterinární medicína》1987,32(9):547-555

Meat tins denoted as pork in natural juice, beef with bacon, luncheon meat and liver paté, all produced in a food-processing plant, were stored under definite conditions (temperature 21 degrees C, relative humidity 73%) for three years. Before the long-term storage and then in half-year intervals, the contents of the residues of chlorinated pesticides, including HCB (hexachlorobenzene), gamma-HCH (gamma isomer of hexachlorocyclohexane) and pp'DDE (1,1-dichloro-2,2-bis/p-chlorofenyl/-ethylene), were determined in the above-mentioned final products by the method of gas chromatography. As suggested by the records of the changes in the pesticide residue contents in the meat tins during their long-term storage, the average contents of all chlorinated carbohydrates gradually decrease with the length of storage and the "reduction" of residues varies with the kind of final product and with the pesticides. In HCB the reduction ranged from 18.4 to 34.4%, in gamma-HCH from 36.2 to 80.4% and in pp'DDE from 23.9 to 48.9%.  相似文献   

Response     

Ames BN  Gold LS 《Science (New York, N.Y.)》1991,251(4994):607-608

  相似文献   

The possible role of methionine in the detoxification of faba bean (Vicia faba L.) tannins in chick diets     

C. N. Wareham  J. Wiseman  D. J. A. Cole  J. Craigon 《British poultry science》1991,32(5):1017-1026

1. A metabolism trial was designed to investigate the role of methionine as a specific detoxifying agent of the condensed tannins present in faba beans (Vicia faba L.).

2. A 5 x 5 factorial approach was employed where 5 concentrations of dietary methionine were obtained (ranging from 3.9 to 12.15 g/kg diet dry matter) by the addition of DL‐methionine, and 5 concentrations of condensed tannins (ranging from 0.5 to 19.7 g/kg diet dry matter) by altering the ratio of tannin‐free and tannin‐containing faba bean hulls added to a basal diet.

3. The intake of condensed tannins had a significant, depressive effect on apparent available nitrogen (P< 0.001) and nitrogen corrected apparent metabolisable energy (AME_n ) (P< 0.001). There was no interaction between methionine and tannin (P>0.05). Thus the depressive effect of tannin was independent of methionine levels in the diet.

4. Methionine does not act as a specific detoxifier of faba bean condensed tannins.  相似文献   

Alberta. Salinomycin toxicity in turkeys          下载免费PDF全文

Harries N 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(2):117

  相似文献