Effects of New Herbicides on Fish     

King JE  Penfound WT 《Science (New York, N.Y.)》1946,103(2677):487-488

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Two-dimensional nanosheets produced by liquid exfoliation of layered materials   总被引：1，自引：0，他引：1  

Coleman JN  Lotya M  O'Neill A  Bergin SD  King PJ  Khan U  Young K  Gaucher A  De S  Smith RJ  Shvets IV  Arora SK  Stanton G  Kim HY  Lee K  Kim GT  Duesberg GS  Hallam T  Boland JJ  Wang JJ  Donegan JF  Grunlan JC  Moriarty G  Shmeliov A  Nicholls RJ  Perkins JM  Grieveson EM  Theuwissen K  McComb DW  Nellist PD  Nicolosi V 《Science (New York, N.Y.)》2011,331(6017):568-571

If they could be easily exfoliated, layered materials would become a diverse source of two-dimensional crystals whose properties would be useful in applications ranging from electronics to energy storage. We show that layered compounds such as MoS(2), WS(2), MoSe(2), MoTe(2), TaSe(2), NbSe(2), NiTe(2), BN, and Bi(2)Te(3) can be efficiently dispersed in common solvents and can be deposited as individual flakes or formed into films. Electron microscopy strongly suggests that the material is exfoliated into individual layers. By blending this material with suspensions of other nanomaterials or polymer solutions, we can prepare hybrid dispersions or composites, which can be cast into films. We show that WS(2) and MoS(2) effectively reinforce polymers, whereas WS(2)/carbon nanotube hybrid films have high conductivity, leading to promising thermoelectric properties.  相似文献   

SURVIVAL OF ASCARIS EGGS AFTER CENTRIFUGING     

Beams HW  King RL 《Science (New York, N.Y.)》1936,84(2171):138-139

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THE VITAMIN C ACTIVITY OF HEXURONIC ACID FROM SUPRARENAL GLANDS     

Waugh WA  King CG 《Science (New York, N.Y.)》1932,76(1983):630

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Role of fault bends in the initiation and termination of earthquake rupture     

King G  Nabecaronlek J 《Science (New York, N.Y.)》1985,228(4702):984-987

Rupture in individual earthquakes apparently is limited to regions between bends in faults. This is illustrated for eight events that have occurred since 1966. A model based on geometric concepts describes why this is so and clarifies earlier ideas of "asperities" and "barriers" used to explain earthquake initiation and termination processes. Because of their importance in the rupture process, bend zones should be monitored for precursory effects.  相似文献   

Induction of AIDS in rhesus monkeys by molecularly cloned simian immunodeficiency virus   总被引：92，自引：0，他引：92  

H Kestler  T Kodama  D Ringler  M Marthas  N Pedersen  A Lackner  D Regier  P Sehgal  M Daniel  N King 《Science (New York, N.Y.)》1990,248(4959):1109-1112

Better understanding of the pathogenesis of acquired immunodeficiency syndrome (AIDS) would be greatly facilitated by a relevant animal model that uses molecularly cloned virus of defined sequence to induce the disease. Such a system would also be of great value for AIDS vaccine research. An infectious molecular clone of simian immunodeficiency virus (SIV) was identified that induces AIDS in common rhesus monkeys in a time frame suitable for laboratory investigation. These results provide another strong link in the chain of evidence for the viral etiology of AIDS. More importantly, they define a system for molecular dissection of the determinants of AIDS pathogenesis.  相似文献   

Linkage of early-onset familial breast cancer to chromosome 17q21   总被引：191，自引：0，他引：191  

J M Hall  M K Lee  B Newman  J E Morrow  L A Anderson  B Huey  M C King 《Science (New York, N.Y.)》1990,250(4988):1684-1689

Human breast cancer is usually caused by genetic alterations of somatic cells of the breast, but occasionally, susceptibility to the disease is inherited. Mapping the genes responsible for inherited breast cancer may also allow the identification of early lesions that are critical for the development of breast cancer in the general population. Chromosome 17q21 appears to be the locale of a gene for inherited susceptibility to breast cancer in families with early-onset disease. Genetic analysis yields a lod score (logarithm of the likelihood ratio for linkage) of 5.98 for linkage of breast cancer susceptibility to D17S74 in early-onset families and negative lod scores in families with late-onset disease. Likelihood ratios in favor of linkage heterogeneity among families ranged between 2000:1 and greater than 10(6):1 on the basis of multipoint analysis of four loci in the region.  相似文献   

Antibody synthesis initiated in vitro by paired explants of spleen and thymus   总被引：7，自引：0，他引：7  

G C Saunders  D W King 《Science (New York, N.Y.)》1966,151(716):1390-1391

Primary in vitro synthesis of antibody has been achieved with a mouse spleen-thymus organ culture system 54 hours after it was incubated for 18 hours with coliphage R17.  相似文献   

A Fluted Point from the Uptar Site, Northeastern Siberia     

ML King  SB Slobodin 《Science (New York, N.Y.)》1996,273(5275):634-636

Lanceolate bifacial points, including one fluted specimen, have been collected from beneath an early Holocene tephra at the Uptar site, northeastern Siberia. Thus, the technology associated with the well-known Paleoindian tradition was not confined to the Americas. The Uptar collection does not compare readily with other Beringian complexes and demonstrates that there is greater diversity in the archaeological record of northeastern Siberia than traditional colonization models imply.  相似文献   

African hot spot volcanism: small-scale convection in the upper mantle beneath cratons   总被引：2，自引：0，他引：2  

King SD  Ritsema J 《Science (New York, N.Y.)》2000,290(5494):1137-1140

Numerical models demonstrate that small-scale convection develops in the upper mantle beneath the transition of thick cratonic lithosphere and thin oceanic lithosphere. These models explain the location and geochemical characteristics of intraplate volcanos on the African and South American plates. They also explain the presence of relatively high seismic shear wave velocities (cold downwellings) in the mantle transition zone beneath the western margin of African cratons and the eastern margin of South American cratons. Small-scale, edge-driven convection is an alternative to plumes for explaining intraplate African and South American hot spot volcanism, and small-scale convection is consistent with mantle downwellings beneath the African and South American lithosphere.  相似文献