Bioenergetics extended: the vital force     

Maloney PC 《Science (New York, N.Y.)》1986,234(4777):768

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Changing climate: geothermal evidence from permafrost in the alaskan arctic   总被引：2，自引：0，他引：2  

Lachenbruch AH  Marshall BV 《Science (New York, N.Y.)》1986,234(4777):689-696

Temperature profiles measured in permafrost in northernmost Alaska usually have anomalous curvature in the upper 100 meters or so. When analyzed by heat-conduction theory, the profiles indicate a variable but widespread secular warming of the permafrost surface, generally in the range of 2 to 4 Celsius degrees during the last few decades to a century. Although details of the climatic change cannot be resolved with existing data, there is little doubt of its general magnitude and timing; alternative explanations are limited by the fact that heat transfer in cold permafrost is exclusively by conduction. Since models of greenhouse warming predict climatic change will be greatest in the Arctic and might already be in progress, it is prudent to attempt to understand the rapidly changing thermal regime in this region.  相似文献   

The funding of science     

Toomay JC 《Science (New York, N.Y.)》1986,234(4777):659

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Atmospheric carbon dioxide and summer soil wetness     

Maccracken MC  Schlesinger ME  Riches MR 《Science (New York, N.Y.)》1986,234(4777):659-660

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Sinking Slabs Puncture Layered Mantle Model: Seismologists are finding that oceanic plates sinking into the mantle plunge right through the supposedly impenetrable boundary between the upper and lower mantle     

Kerr RA 《Science (New York, N.Y.)》1986,231(4738):548-549

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Cliff swallow colonies as information centers     

Brown CR 《Science (New York, N.Y.)》1986,234(4772):83-85

Colonies of cliff swallows (Aves: Hirundo pyrrhonota) appear to be information centers in which colony residents acquire information on the location of food sources. Individuals that have been unsuccessful on a foraging trip return to the colony, locate a successful forager, and follow that individual to a food source. Individuals often follow, and are followed by, their neighbors within the colony, possibly because neighbors can observe foraging success through food brought back to nestlings. All individuals are equally likely to follow others or be followed, and thus all individuals benefit from opportunities to receive information.  相似文献   

Black holes--"ingestars"?     

Shurcliff WA 《Science (New York, N.Y.)》1986,231(4744):1355

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Edentates: the evolution and ecology of armadillos, sloths, and vermilinguas     

McKenna MC 《Science (New York, N.Y.)》1986,233(4768):1102-1103

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Porcine rabies in a closed feeder barn          下载免费PDF全文

Hazlett MJ  Koller MA 《The Canadian veterinary journal. La revue veterinaire canadienne》1986,27(3):116-118

Rabies was diagnosed in a 40 kg pig from a closed feeder barn in which recently unexplained deaths of eight to ten pigs had occurred. A stray cat, probably crawling through a ventilation duct into the barn, was the suspected vector. Over a four and one-quarter year period a disproportionate 53 cases of animal rabies had been diagnosed within a 5 km radius of the farm (13% of the cases in the county in 3% of the county area). Histological lesions, mostly lymphocytic cuffing of blood vessels in the brain with lymphocytic meningitis, patchy to focal gliosis and satellitosis with neuronal necrosis were nonspecific and Negri bodies were rare. Fluorescent antibody technique examination of the brain for rabies virus antigen was positive.  相似文献   

Improved yersinia isolation from enteric specimens          下载免费PDF全文

Lynch JA 《The Canadian veterinary journal. La revue veterinaire canadienne》1986,27(3):154

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