Nuclear weapons: wartime bomb projects     

Schmidt FH 《Science (New York, N.Y.)》1978,199(4335):1286-1290

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THE SYNTHESIS OF A POLYSACCHARIDE FROM GLUCOSE-1-PHOSPHATE IN MUSCLE EXTRACT     

Cori CF  Schmidt G  Cori GT 《Science (New York, N.Y.)》1939,89(2316):464-465

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Retention of xenon in quartz and Earth's missing xenon     

Sanloup C  Schmidt BC  Chamorro Perez EM  Jambon A  Gregoryanz E  Mezouar M 《Science (New York, N.Y.)》2005,310(5751):1174-1177

The reactivity of xenon with terrestrial oxides was investigated by in situ synchrotron x-ray diffraction. At high temperature (T > 500 kelvin), some silicon was reduced, and the pressure stability of quartz was expanded, attesting to the substitution of some xenon for silicon. When the quartz was quenched, xenon diffused out and only a few weight percent remained trapped in samples. These results show that xenon can be covalently bonded to oxygen in quartz in the lower continental crust, providing an answer to the missing xenon problem; synthesis paths of rare gas compounds are also opened.  相似文献   

A THEORY OF PROTEIN METABOLISM: THE TRANSFORMATION OF PROTEINS     

Schmidt CL  Allen FW  Tarver H 《Science (New York, N.Y.)》1940,91(2349):18-19

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Condensation nucleus discriminator making optical measurements on fog: a tool for environmental research     

Hart EJ  Schmidt KH  Vasudevan KN 《Science (New York, N.Y.)》1973,180(4090):1064-1067

An instrument providing a new, rapid, and accurate method of determining the number and critical radii of condensation nuclei with radii under 200 angstroms is described. Based on the principle of the cloud chamber, the instrument measures transient changes in the attenuation and scattering of a monochromatic light beam by the growing fog droplets. From data obtained the absolute number concentration and radii of condensation nuclei can be calculated. Preliminary studies of aerosol formation in beta-irradiated mixtures of air and sulfur dioxide showed that carbon monoxide and methane inhibit the formation of nuclei; relative rate constants can be deduced. Some applications of this instrument for environmental and basic research are pointed out.  相似文献   

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   

国产农用喷雾器喷头性能参数测定与分析     

李秉礼  吴罗罗  阴景润  E.Moser  K.Schmidt 《中国农业大学学报》1989,(1):119-125

本文介绍了国产喷雾器喷头的几个主要性能参数与国外著名喷头公司产品的对比结果、并提出了改进我国喷头产品的若干建议。如:1.影响侧向进液式喷头喷量变异的因素。2.缝隙式扇雾喷头药液沉积横向分布中的牛角、对喷杆式喷雾器药液沉积分布均匀性有着极坏的影响。  相似文献   

A CHEMICAL DIFFERENCE BETWEEN PROTEIN-LINKED AND FREE NUCLEIC ACID     

Schmidt G 《Science (New York, N.Y.)》1936,83(2140):15

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Physical mapping of a translocation breakpoint in neurofibromatosis   总被引：13，自引：0，他引：13  

J W Fountain  M R Wallace  M A Bruce  B R Seizinger  A G Menon  J F Gusella  V V Michels  M A Schmidt  G W Dewald  F S Collins 《Science (New York, N.Y.)》1989,244(4908):1085-1087

The gene for von Recklinghausen neurofibromatosis (NF1), one of the most common autosomal-dominant disorders of humans, was recently mapped to chromosome 17 by linkage analysis. The identification of two NF1 patients with balanced translocations that involved chromosome 17q11.2 suggests that the disease can arise by gross rearrangement of the NF1 locus, and that the NF1 gene might be identified by cloning the region around these translocation breakpoints. To further define the region of these translocations, a series of chromosome 17 Not I-linking clones has been mapped to proximal 17q and studied by pulsed-field gel electrophoresis. One clone, 17L1 (D17S133), clearly identifies the breakpoint in an NF1 patient with a t(1;17) translocation. A 2.3-megabase pulsed-field map of this region was constructed and indicates that the NF1 breakpoint is only 10 to 240 kilobases away from 17L1. This finding prepares the way for the cloning of NF1.  相似文献   

Materials science. How nanowires grow     

Schmidt V  Gösele U 《Science (New York, N.Y.)》2007,316(5825):698-699

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