Voyager Finds Uranian Shepherds and a Well-Behaved Flock of Rings: Voyager 2 discovered the moonlets predicted to shape the Uranian rings, two new rings, a predominance of boulders in the rings, and much more     

Kerr RA 《Science (New York, N.Y.)》1986,231(4740):793-796

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Why Dynamiting Vampire Bats Is Wrong: A new report argues that it is not the lack of ecological information that leads to poor environmental planning, but simply the lack of its proper application     

Lewin R 《Science (New York, N.Y.)》1986,232(4746):24-26

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Engineers in the social order: mechanics of the middle class     

Jackall R 《Science (New York, N.Y.)》1986,232(4753):1014

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Chemical oceanography: geochemistry of organic matter in the ocean     

Suess E 《Science (New York, N.Y.)》1986,232(4753):1032

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GAO Blasts Bigeye Chemical Weapon: A new study says that technical problems and inconsistencies in test results indicate that the bomb should not be produced     

Smith RJ 《Science (New York, N.Y.)》1986,232(4757):1493-1494

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Inquiry Faults Shuttle Management: Rogers Commission calls for sweeping reforms in NASA's operations, as well as substantial changes in the design of the solid-rocket seals     

Smith RJ 《Science (New York, N.Y.)》1986,232(4757):1488-1489

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Myths and Methods in Ice Age Art: The painted caves of Ice Age Europe have always entranced those who study them, but new directions in archeology are showing how some popular interpretations might have gone awry     

Lewin R 《Science (New York, N.Y.)》1986,234(4779):936-938

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Molecular transformations on single crystal metal surfaces     

Madix RJ 《Science (New York, N.Y.)》1986,233(4769):1159-1166

One of the primary objectives of modern surface chemistry of transition metals is the synthesis of surface compounds and complexes and the understanding of their reactivity, structure, and bonding. Such considerations are paramount for advancing understanding of catalysis, adhesion, organic thin-film growth, and electrocatalysis. On selected metals, particularly copper, silver, and gold, selective scission of X-H bonds (where X is oxygen, carbon, nitrogen, or sulfur) by surface-bound atomic oxygen occurs to form moderately stable species that can be isolated for further study. Selective oxidation reactions may occur heterogeneously by means of this novel oxygen- activated route. Furthermore, this selective chemistry offers a paradigm for synthesis of a wide variety of surface organometallic complexes, whose formation can be predicted from acid-base principles. These subjects are discussed in this article with emphasis on their role in catalytic oxidation cycles.  相似文献   

Administration of research     

Gross PR 《Science (New York, N.Y.)》1986,232(4754):1078

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Phalangeal and navicular bone hypoplasia and hoof malformation in the hind limbs of a foal          下载免费PDF全文

Smith DR  Leach DH  Bell RJ 《The Canadian veterinary journal. La revue veterinaire canadienne》1986,27(1):28-30,31-34

Anatomical anomalies in the hind feet of a seven month old Appaloosa foal were identified and investigated through the use of gross anatomical dissection, radiography and angiography. Abnormalities were restricted to the distal aspect of both hind legs, the right hind leg being more severely affected. Anatomically the right foot resembled that of an equine fetus of approximately 120 days gestational age. Disruption of vascular perfusion to hoof structures was evident in both hind legs and was related to areas of abnormal bone conformation as well as to areas of abnormal ossification and calcification. Phalangeal and navicular bone hypoplasia were apparent as were soft tissue and joint anomalies. Although the etiology of the defects identified remains obscure, several theories are suggested, namely heritability, acquired defects and the possible teratogenic effects of clenbuterol.  相似文献