Toxicology labs to bar financial conflicts     

Marshall E 《Science (New York, N.Y.)》1983,221(4612):728-729

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House Report Blasts DOE on Oak Ridge Pollution     

Marshall E 《Science (New York, N.Y.)》1983,222(4625):824-825

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Cosmology: the big bang and element creation     

Kolb E 《Science (New York, N.Y.)》1983,222(4628):1116-1117

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Federal Court Finds IBT Officials Guilty of Fraud     

Marshall E 《Science (New York, N.Y.)》1983,222(4623):488

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Bugs in the yellow rain theory     

Marshall E 《Science (New York, N.Y.)》1983,220(4604):1356-1358

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The duration of immunity to an inactivated adjuvanted canine parvovirus vaccine. A 52 and 64 week postvaccination challenge study   总被引：1，自引：1，他引：0       下载免费PDF全文

Povey RC  Carman PS  Ewert E 《The Canadian veterinary journal. La revue veterinaire canadienne》1983,24(8):245-248

Dogs were successfully isolated for a period of either 52 or 64 weeks following vaccination with an inactivated, adjuvanted canine parvovirus-2 vaccine. Antibody persisted in all ten vaccinated dogs, although in one case by 52 weeks postvaccination only virus neutralizing antibody, and not hemagglutination-inhibiting antibody, could be detected. Sentinel unvaccinated dogs housed alongside the vaccinated dogs throughout the study remained free of canine parvovirus-2 antibody until challenged. Upon oral challenge with canine parvovirus-2 infected material all unvaccinated dogs developed one or more signs of canine parvovirus-2 disease, shed virus and developed antibody. None of the vaccinated dogs became overtly sick. Of the five vaccinated dogs challenged 52 weeks after vaccination, three shed virus and one showed a significant rise in antibody. At 64 weeks after vaccination only one of the five challenged dogs shed virus and showed a boost in antibody titer.  相似文献   

A diet-induced developmental polymorphism in a caterpillar     

Greene E 《Science (New York, N.Y.)》1989,243(4891):643-646

Caterpillars of the spring brood of Nemoria arizonaria develop into mimics of the oak catkins upon which they feed. Caterpillars from the summer brood emerge after the catkins have fallen and they develop instead into mimics of oak twigs. This developmental polymorphism may be triggered by the concentration of defensive secondary compounds in the larval diet: all caterpillars raised on catkins, which are low in tannin, developed into catkin morphs; those raised on leaves, which are high in tannin, developed into twig morphs; most raised on artificial diets of catkins with elevated tannin concentrations developed into twig morphs.  相似文献   

The chemistry of solid-state electronics     

Yablonovitch E 《Science (New York, N.Y.)》1989,246(4928):347-351

Since the original theoretical insights of Bardeen and Shockley about 40 years ago, the progress of solid-state electronics has been paced by the ability to control chemical bonding structures, particularly at surfaces and interfaces. The functioning of solid-state devices depends on being able to produce interfacial structures with a minimum number of defective chemical bonds. A series of chemical discoveries and insights, on germanium (Ge) and silicon (Si) surfaces and gallium arsenide-aluminum arsenide (GaAs-AlAs) interfaces, has brought the electronics revolution to its present state of development. In most cases, the technological consequences of these accidental discoveries could not be accurately foreseen. With that caution, the technological prognosis for some current research is also reviewed.  相似文献   

A developmental model: molecular biology of dictyostelium development     

Luna E 《Science (New York, N.Y.)》1989,244(4909):1201-1202

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Clean Air? Don't Hold Your Breath: Over the next few months, Congress will try to rewrite the Clean Air Act. Economists argue that existing smog standards are already too costly, while researchers raise new health concerns     

Marshall E 《Science (New York, N.Y.)》1989,244(4904):517-520

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