排序方式: 共有10条查询结果,搜索用时 62 毫秒
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Action of neuraminidase on human kidney alkaline phosphatase 总被引:10,自引:0,他引:10
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Role of gut flora in the genotoxicity of dinitrotoluene 总被引:2,自引:0,他引:2
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Zinc ions inhibit replication of rhinoviruses 总被引:15,自引:0,他引:15
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Influence of sex in immunoglobulin levels 总被引:15,自引:0,他引:15
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Antibody-dependent cell-mediated damage to schistosomula in vitro 总被引:22,自引:0,他引:22
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The carotenoid pigments of six species of adult acanthocephala 总被引:1,自引:0,他引:1
Zusammenfassung Die Carotinoide in 6 Spezies erwachsener Acanthocephalen wurden identifiziert. Lutein wurde als einziges Carotinoid inP. galaxis undN. pseudemydis gefunden und als wichtigstes Carotinoid inM. hirudinaceus festgestellt.F. anatis undP. laevis enthielten nur -Carotin, während das veresterte Astexanthin als einziges Pigment inN. ornatus auftrat.
We thank Dr.M. Hine and Dr.A. Pike for sending us material which was used in this study. Part of the work was carried out in the Dept. of Zoology, University of Massachusetts, Amherst (Mass., USA). 相似文献
We thank Dr.M. Hine and Dr.A. Pike for sending us material which was used in this study. Part of the work was carried out in the Dept. of Zoology, University of Massachusetts, Amherst (Mass., USA). 相似文献
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Huffman PR Brome CR Butterworth JS Coakley KJ Dewey MS Dzhosyuk SN Golub R Greene GL Habicht K Lamoreaux SK Mattoni CE McKinsey DN Wietfeldt FE Doyle JM 《Nature》2000,403(6765):62-64
Accurate measurement of the lifetime of the neutron (which is unstable to beta decay) is important for understanding the weak nuclear force and the creation of matter during the Big Bang. Previous measurements of the neutron lifetime have mainly been limited by certain systematic errors; however, these could in principle be avoided by performing measurements on neutrons stored in a magnetic trap. Neutral-particle and charged-particle traps are widely used for studying both composite and elementary particles, because they allow long interaction times and isolation of particles from perturbing environments. Here we report the magnetic trapping of neutrons. The trapping region is filled with superfluid 4He, which is used to load neutrons into the trap and as a scintillator to detect their decay. Neutrons in the trap have a lifetime of 750(+330)(-200) seconds, mainly limited by their beta decay rather than trap losses. Our experiment verifies theoretical predictions regarding the loading process and magnetic trapping of neutrons. Further refinement of this method should lead to improved precision in the neutron lifetime measurement. 相似文献
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Eosinophils as mediators of antibody-dependent damage to schistosomula. 总被引:67,自引:0,他引:67
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Butterworth J 《Nature》2012,485(7399):455-456
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