Cancer control     

Chelimsky E 《Science (New York, N.Y.)》1987,236(4805):1050

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Techniques and strategies of verification     

Koshland DE 《Science (New York, N.Y.)》1987,235(4787):405

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A low-threshold test ban is feasible     

Feiveson HA  Paine CE  VON Hippel F 《Science (New York, N.Y.)》1987,238(4826):455-459

At present, nuclear explosions are limited by treaty to underground testing with yields of no more than 150 kilotons, and recently there have been renewed calls for further test restrictions. As part of these discussions, the U.S. Congress is considering bills that would legislate new limits to testing,whereas the Reagan Administration opposes such constraints. The editors of Science have asked two groups of participants in the debate to present their arguments for or against new limits to testing. Feiveson, Paine, and von Hippel argue for a treaty of indefinite duration between the United States and the Soviet Union, which includes the following provisions: (i) a ban on all testing outside a desiqnated site having known seismic properties; (ii)verification by means of on-site inspection and in-country seismic monitoring; (iii) unlimited testing below 1 kiloton at the special site; and (iv) an average of one test per year with a yield of up to 15 kilotons for ensuring reliability of the nuclear stockpile. MiUer, Brown, and Nordyke argue that a lowering of the present 150-kiloton threshold would be undesirable, and that new test bans would divert attention from a comprehensive approach to negotiated reductions in the nuclear and conventional arsenals of the United States and the Soviet Union.  相似文献   

A Spy Satellite for the Press?: The U.S.-Soviet domination of space surveillance comes to an end as French, Chinese, and U.S. news organizations consider new satellites     

Marshall E 《Science (New York, N.Y.)》1987,238(4832):1346-1348

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Euthanasia of reptiles and amphibians     

Cooper JE  Ewbank R  Platt C  Warwick C 《New Zealand veterinary journal》1987,35(1-2):14

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Space station price climbs higher     

Marshall E 《Science (New York, N.Y.)》1987,237(4812):242-243

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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   

Congenital skeletal deformity syndrome   总被引：1，自引：1，他引：0       下载免费PDF全文

Ribble CS  Janzen ED 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(4):160

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Telephone advice and the law          下载免费PDF全文

Rozovsky LE 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(4):209-217

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Infestation in the dog by the paralysis tick Ixodes holocyclus 3. Respiratory effects     

J. E. ILKIW  D. M. TURNER 《Australian veterinary journal》1987,64(5):142-144

To assess respiratory function in dogs with tick paralysis, respiratory measurements were recorded on 14 dogs experimentally infested with Ixodes holocyclus. There was a progressive fall in respiratory rate with no change in tidal volume, which resulted in a significant fall in minute respiratory volume in the latter stages of the disease. The fall in respiratory rate was possibly central in origin and was accompanied by an increased alveolar-arterial oxygen tension difference, probably caused by pulmonary congestion and oedema. The "grunting" respiration seen in tick paralysis was due to closure of the vocal cords during expiration and could represent an attempt to re-expand collapsed parts of the lung.  相似文献