Rotating Sector Method Applied to Reactions Induced by Co60 Gamma Rays     

Hummel RW  Freeman GR  Van Cleave AB  Spinks JW 《Science (New York, N.Y.)》1954,119(3083):159-160

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Voyager 1 planetary radio astronomy observations near jupiter     

Warwick JW  Pearce JB  Riddle AC  Alexander JK  Desch MD  Kaiser ML  Thieman JR  Carr TD  Gulkis S  Boischot A  Harvey CC  Pedersen BM 《Science (New York, N.Y.)》1979,204(4396):995-998

We report results from the first low-frequency radio receiver to be transported into the Jupiter magnetosphere. We obtained dramatic new information, both because Voyager was near or in Jupiter's radio emission sources and also because it was outside the relatively dense solar wind plasma of the inner solar system. Extensive radio spectral arcs, from above 30 to about 1 megahertz, occurred in patterns correlated with planetary longitude. A newly discovered kilometric wavelength radio source may relate to the plasma torus near Io's orbit. In situ wave resonances near closest approach define an electron density profile along the Voyager trajectory and form the basis for a map of the torus. Detailed studies are in progress and are out-lined briefly.  相似文献   

Use of ionic liquids for pi-conjugated polymer electrochemical devices     

Lu W  Fadeev AG  Qi B  Smela E  Mattes BR  Ding J  Spinks GM  Mazurkiewicz J  Zhou D  Wallace GG  MacFarlane DR  Forsyth SA  Forsyth M 《Science (New York, N.Y.)》2002,297(5583):983-987

pi-Conjugated polymers that are electrochemically cycled in ionic liquids have enhanced lifetimes without failure (up to 1 million cycles) and fast cycle switching speeds (100 ms). We report results for electrochemical mechanical actuators, electrochromic windows, and numeric displays made from three types of pi-conjugated polymers: polyaniline, polypyrrole, and polythiophene. Experiments were performed under ambient conditions, yet the polymers showed negligible loss in electroactivity. These performance advantages were obtained by using environmentally stable, room-temperature ionic liquids composed of 1-butyl-3-methyl imidazolium cations together with anions such as tetrafluoroborate or hexafluorophosphate.  相似文献   

Shifting Viewpoints     

Warwick E. Murray 《Asia Pacific viewpoint》2004,45(2):137-139

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Political conflict in postcolonial Oceania     

Warwick E. Murray  Donovan Storey 《Asia Pacific viewpoint》2003,44(3):213-224

Abstract: This article provides an overview of growing conflict in Oceania and considers some of the broad attempts to explain it. It critically outlines the nature of the post‐colonial transformation of the region and considers the influence of this on patterns of instability. It concludes that the region exhibits an unprecedented vulnerability in politico‐economic, social and environmental terms and that useful interpretations of this must involve attention to local contingency as well as broad structural/historical change. This context is used to introduce the contributions to this special edition on postcolonial transformations and political conflict in Oceania.  相似文献   

Nephrogenic Diabetes lnsipidus—in Sibling Colts     

Harold C. Schott II DVM  PhD    Warwick M. Bayly BVSc  MS    Stephen M. Reed DVM  Duane F. Brobst DVM  PhD 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1993,7(2):68-72

Nephrogenic diabetes insipidus was diagnosed in two full sibling Thoroughbred colts. Each colt had a history of excessive urination. Extreme polydipsia (greater than 80 L per day) was documented in both colts. Inability to concentrate urine in response to water deprivation, infusion of hypertonic saline, or exogenous vasopressin administration indicated insensitivity of the collecting duct epithelial cells to vasopressin. A diagnosis of nephrogenic diabetes insipidus was further supported by a normal increase in plasma vasopressin concentration after water deprivation in the one colt in which such testing was pursued.  相似文献   

Constitutive expression of Cry proteins in roots and border cells of transgenic cotton   总被引：3，自引：0，他引：3  

Oliver G. G. Knox  Vadakattu V. S. R. Gupta  David B. Nehl  Warwick N. Stiller 《Euphytica》2007,154(1-2):83-90

Transgenic cotton plants expressing Cry1Ac and Cry2Ab, from the soil bacterium Bacillus thuringiensis (Bt), provide effective control of certain lepidopteran pests, however, little is known about the proteins below ground expression. We used ELISA to quantify in vitro expression of the Cry1Ac and Cry2Ab proteins in mucilage, root border cells and root tips in five transgenic cultivars of cotton compared to conventional cultivar Sicot 189. Expression of Cry proteins in roots and border cells of the transgenic cotton cultivars was constitutive and at detectable levels, with Cry1Ac and Cry2Ab protein expression ranging from <20 ppb to >100 pbb. To determine if genetically modified cotton demonstrated simple differences in properties of the root, when compared to an elite parental line (cv. Sicot 189), we enumerated border cells on seedling radicles. Border cell counts of 14 cultivars ranged from 0.2 to 1.1 × 10⁴ cells per root tip with an average of 5 × 10³ border cells. Border cell production in the transgenic cultivars was generally similar to that of both donor and elite parents, the exception being the cultivar Sicot 189, which had substantially more border cells than all of its transgenic derivatives. Comparison of border cell number with varietal disease resistance ranking found a limited relationship (r ² = 0.65, n = 7) between border cell numbers and the commercial resistance rank against Fusarium wilt of cotton. The implications of differences in cotton cultivar border cell number and root tip expression of Cry proteins for plant–microbe interactions in the rhizosphere and the soil ecosystem are yet to be resolved.  相似文献   

Comparison of neonatal thyroid-stimulating hormone levels and indicators of iodine deficiency in school children     

Copeland DL  Sullivan KM  Houston R  May W  Mendoza I  Salamatullah Q  Solomons N  Nordenberg D  Maberly GF 《Public health nutrition》2002,5(1):81-87

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FORUM     

Warwick Harnell 《Australian veterinary journal》1998,76(1):16-17

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Oesophageal papillomata in cattle in Kenya     

J. Thorsen  J. E. Cooper  G. P. Warwick 《Tropical animal health and production》1974,6(2):95-98

Summary Since no figures were available on the frequency of occurrence of oesophageal papillomata in cattle, the prevalence in cattle in Kenya was determined by a random survey at the largest abattoir in the country. Interest was stimulated by the report of Plowright (1955) and by the author's observations that oesophageal papillomata were present in cattle with rumenal carcinoma in the Nasampolai valley, Kenya. Oesophageal papillomata were found in46 of752 oesophagi examined (6·1 per cent). The cattle originated from various geographical areas of Kenya with varying climatic conditions and vegetation.

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Sumario Desde que no hubieron datos sobre la ocurrencia de papilomas en el esófago en ganado vacuno, su incidencia en el ganado bovino en Kenya fue determinada mediante una encuesta en el matadero mas grande del pais. El interés fue estimulado por el reporte de Plowright (1955) y por las observaciones de los autores de que papilomas en el esófago estaban presentes en ganado con carcinoma ruminal en el valle de Nasampolai en Kenya. Papilomas en el esófago fueron encontrados en 46 de 752 esófagos examinados (6·1 por ciento). El ganado se originaba de diversas areas de Kenya de diversas condiciones climáticas y de diversa vegetación.

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Résumé Comme il n'existe aucune donnée disponible sur la fréquence de la papillomatose oesophagienne du bétail au Kenya, l'importance de cette affection a été déterminée par une enquête au hasard dans le plus grand abattoir du pays. L'intérêt de cette enquête découlait grandement du rapport de Plowright (1955) et des observations des auteurs qui avaient montré que la papillomatose oesophagienne se trouvait associée au carcinome du rumen chez le bétail de la Vallée de Nasampolai au Kenya. Cette papillomatose fut trouvée sur 46 des 752 oesophages examinés (6,1 p. 100). Ces animaux venaient des régions très diverses du Kenya, dans lesquelles les conditions climatiques et la végétation étaient différentes.

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On secondment from the A.R.C. Institute for Research on Animal Diseases Compton, Berkshire, England.

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This work was carried out during a period of secondment to the University of Nairobi Medical School, Nairobi, Kenya.  相似文献