PSITTACOSIS EPIDEMICS AND PLEOMORPHIC PROTOPLASM     

Murray E 《Science (New York, N.Y.)》1930,71(1842):417-418

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Earthquake potential along the northern hayward fault, california   总被引：1，自引：0，他引：1  

Burgmann R  Schmidt D  Nadeau RM  d'Alessio M  Fielding E  Manaker D  McEvilly TV  Murray MH 《Science (New York, N.Y.)》2000,289(5482):1178-1182

The Hayward fault slips in large earthquakes and by aseismic creep observed along its surface trace. Dislocation models of the surface deformation adjacent to the Hayward fault measured with the global positioning system and interferometric synthetic aperture radar favor creep at approximately 7 millimeters per year to the bottom of the seismogenic zone along a approximately 20-kilometer-long northern fault segment. Microearthquakes with the same waveform repeatedly occur at 4- to 10-kilometer depths and indicate deep creep at 5 to 7 millimeters per year. The difference between current creep rates and the long-term slip rate of approximately 10 millimeters per year can be reconciled in a mechanical model of a freely slipping northern Hayward fault adjacent to the locked 1868 earthquake rupture, which broke the southern 40 to 50 kilometers of the fault. The potential for a major independent earthquake of the northern Hayward fault might be less than previously thought.  相似文献   

ALEXANDER AGASSIZ: HIS LIFE AND SCIENTIFIC WORK     

Murray J 《Science (New York, N.Y.)》1911,33(858):873-887

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Removal of meteoric iron on polar mesospheric clouds     

Plane JM  Murray BJ  Chu X  Gardner CS 《Science (New York, N.Y.)》2004,304(5669):426-428

Polar mesospheric clouds are thin layers of nanometer-sized ice particles that occur at altitudes between 82 and 87 kilometers in the high-latitude summer mesosphere. These clouds overlap in altitude with the layer of iron (Fe) atoms that is produced by the ablation of meteoroids entering the atmosphere. Simultaneous observations of the Fe layer and the clouds, made by lidar during midsummer at the South Pole, demonstrate that essentially complete removal of Fe atoms can occur inside the clouds. Laboratory experiments and atmospheric modeling show that this phenomenon is explained by the efficient uptake of Fe on the ice particle surface.  相似文献   

Guest-dependent spin crossover in a nanoporous molecular framework material     

Halder GJ  Kepert CJ  Moubaraki B  Murray KS  Cashion JD 《Science (New York, N.Y.)》2002,298(5599):1762-1765

The nanoporous metal-organic framework Fe2(azpy)4(NCS)4.(guest) (azpy is trans-4,4'-azopyridine) displays reversible uptake and release of guest molecules and contains electronic switching centers that are sensitive to the nature of the sorbed guests. The switching of this material arises from the presence of iron(II) spin crossover centers within the framework lattice, the sorbed phases undergoing "half-spin" crossovers, and the desorbed phase showing no switching property. The interpenetrated framework structure displays a considerable flexibility with guest uptake and release, causing substantial changes in the local geometry of the iron(II) centers. The generation of a host lattice that interacts with exchangeable guest species in a switchable fashion has implications for the generation of previously undeveloped advanced materials with applications in areas such as molecular sensing.  相似文献   

Geochemistry. Continental margins and the sulfur cycle     

Derry LA  Murray RW 《Science (New York, N.Y.)》2004,303(5666):1981-1982

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Anthropology. Overkill and sustainable use     

Murray M 《Science (New York, N.Y.)》2003,299(5614):1851-1853

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Intellectual property. Enhanced: intellectual property landscape of the human genome     

Jensen K  Murray F 《Science (New York, N.Y.)》2005,310(5746):239-240

The impact of gene patents on downstream research and innovation are unknown, in part because of a lack of empirical data on the extent and nature of gene patenting. In this Policy Forum, the authors show that 20% of human gene DNA sequences are patented and that some genes are patented as many as 20 times. Unsurprisingly, genes associated with health and disease are more patented than the genome at large. The intellectual property rights for some genes can become highly fragmented between many owners, which suggests that downstream innovators may face considerable costs to gain access to gene-oriented technologies.  相似文献   

RICKETS,ULTRA-VIOLET LIGHT AND MILK     

Gowen JW  Murray JM  Gooch ME  Ames FB 《Science (New York, N.Y.)》1926,63(1621):97-98

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Preschool programs and later school competence of children from low-income families     

Darlington RB  Royce JM  Snipper AS  Murray HW  Lazar I 《Science (New York, N.Y.)》1980,208(4440):202-204

At follow-up in 1976, low-income children who had attended infant and preschool programs in the 1960's had significantly higher rates of meeting school requirements than did controls, as measured by lower frequency of placement in special education classes and of being retained in grade (held back).  相似文献