ON THE NATURE OF THE SOLAR CORONA,WITH SOME SUGGESTIONS FOR WORK AT THE NEXT TOTAL ECLIPSE     

Wood RW 《Science (New York, N.Y.)》1901,13(318):179-180

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Intragranular diffusion: an important mechanism influencing solute transport in clastic aquifers?     

Wood WW  Kraemer TF  Hearn PP 《Science (New York, N.Y.)》1990,247(4950):1569-1572

Quantification of intragranular porosity in sand-size material from an aquifer on Cape Cod, Massachusetts, by scanning electron microscopy, mercury injection, and epifluorescence techniques shows that there are more reaction sites and that porosity is greater than indicated by standard short-term laboratory tests and measurement techniques. Results from laboratory and field tracer tests show solute nonequilibrium for a reacting ion consistent with a model of diffusion into, and exchange within, grain interiors. These data indicate that a diffusion expression needs to be included in transport codes, particularly for simulation of the transport of radioactive and toxic wastes.  相似文献   

Electrical sources in human somatosensory cortex: identification by combined magnetic and potential recordings   总被引：7，自引：0，他引：7  

C C Wood  D Cohen  B N Cuffin  M Yarita  T Allison 《Science (New York, N.Y.)》1985,227(4690):1051-1053

Magnetic fields and electrical potentials produced by neuronal activity have different properties that can be used for the identification of electrical sources in the human brain. Fields and potentials occurring 20 to 30 milliseconds after median nerve stimulation in human subjects were compared in order to investigate the sources of evoked potential components that have been attributed by different investigators to the thalamus or thalamocortical afferents, to separate radial sources in somatosensory cortex and motor cortex, or to a tangential source in somatosensory cortex. The magnetic and potential wave forms were highly similar in morphology, and their spatial distributions were centered over sensorimotor cortex, were dipolar in shape, and differed in orientation by approximately 90 degrees; distances between the minimum and maximum of the magnetic distributions were about 60 percent of those of the potential distributions. These results cannot be accounted for by thalamic sources or radial cortical sources alone, but are consistent with a tangential source in somatosensory cortex, with an additional smaller contribution from radial sources.  相似文献   

ORGANIZATION OF THE AMERICAN SECTION OF THE INTERNATIONAL GEOPHYSICAL UNION. II     

Wood HO 《Science (New York, N.Y.)》1919,50(1289):255-258

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RAMAN SPECTRUM OF HEAVY WATER     

Wood RW 《Science (New York, N.Y.)》1933,78(2034):578

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The human genus     

Wood B  Collard M 《Science (New York, N.Y.)》1999,284(5411):65-71

A general problem in biology is how to incorporate information about evolutionary history and adaptation into taxonomy. The problem is exemplified in attempts to define our own genus, Homo. Here conventional criteria for allocating fossil species to Homo are reviewed and are found to be either inappropriate or inoperable. We present a revised definition, based on verifiable criteria, for Homo and conclude that two species, Homo habilis and Homo rudolfensis, do not belong in the genus. The earliest taxon to satisfy the criteria is Homo ergaster, or early African Homo erectus, which currently appears in the fossil record at about 1.9 million years ago.  相似文献   

Potent analgesic effects of GDNF in neuropathic pain states     

Boucher TJ  Okuse K  Bennett DL  Munson JB  Wood JN  McMahon SB 《Science (New York, N.Y.)》2000,290(5489):124-127

Neuropathic pain arises as a debilitating consequence of nerve injury. The etiology of such pain is poorly understood, and existing treatment is largely ineffective. We demonstrate here that glial cell line-derived neurotrophic factor (GDNF) both prevented and reversed sensory abnormalities that developed in neuropathic pain models, without affecting pain-related behavior in normal animals. GDNF reduces ectopic discharges within sensory neurons after nerve injury. This may arise as a consequence of the reversal by GDNF of the injury-induced plasticity of several sodium channel subunits. Together these findings provide a rational basis for the use of GDNF as a therapeutic treatment for neuropathic pain states.  相似文献   

Response     

Moore MW  Cacalano G  Wood WI  Bailish E 《Science (New York, N.Y.)》1995,269(5230):1591

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A QUICK METHOD OF PRESERVING CATS FOR DISSECTION     

Wood HE 《Science (New York, N.Y.)》1927,65(1680):261-264

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Evidence for the occurrence of induced resistance to pitch canker,caused by Gibberella circinata (anamorph Fusarium circinatum), in populations of Pinus radiata     

T. R. Gordon  S. C. Kirkpatrick  B. J. Aegerter  A. J. Fisher  A. J. Storer  D. L. Wood 《Forest Pathology》2011,41(3):227-232

Pitch canker, caused by Gibberella circinata, was discovered in California in 1986. Although initially quite damaging to Monterey pines (Pinus radiata), the severity of pitch canker has moderated in areas where the disease was first observed and some trees appear to have recovered completely. The absence of symptoms on trees that were once severely affected implies they have become more resistant to the disease. Experimental work has shown that P. radiata can manifest systemic induced resistance (SIR) in response to infection by the pitch canker pathogen and observations of disease remission may indicate that SIR is operative under natural conditions as well. As a test of this hypothesis, the susceptibility of trees in remission was assessed by inoculating them with G. circinata and recording the extent of lesion development. In addition, randomly selected trees in areas that differed in residence time of pitch canker were inoculated to determine if trees with a longer period of exposure to the pathogen were more resistant to the disease. The results of these tests showed that 89% of trees observed to be in remission sustained very limited lesion development, consistent with resistance to pitch canker. Furthermore, trees in areas where pitch canker was well established tended to be more resistant than trees in areas where the disease was of more recent occurrence. In sum, these findings support the view that SIR occurs in P. radiata and is contributing to a moderation of the impact of pitch canker under natural conditions.  相似文献