The Current State of Solar Modeling     

J Christensen-Dalsgaard  W Dappen  SV Ajukov  ER Anderson  HM Antia  S Basu  VA Baturin  G Berthomieu  B Chaboyer  SM Chitre  AN Cox  P Demarque  J Donatowicz  WA Dziembowski  M Gabriel  DO Gough  DB Guenther  JA Guzik  JW Harvey  F Hill  G Houdek  CA Iglesias  AG Kosovichev  JW Leibacher  P Morel  CR Proffitt  J Provost  J Reiter  EJ Rhodes  FJ Rogers  IW Roxburgh  MJ Thompson  RK Ulrich 《Science (New York, N.Y.)》1996,272(5266):1286-1292

Data from the Global Oscillation Network Group (GONG) project and other helioseismic experiments provide a test for models of stellar interiors and for the thermodynamic and radiative properties, on which the models depend, of matter under the extreme conditions found in the sun. Current models are in agreement with the helioseismic inferences, which suggests, for example, that the disagreement between the predicted and observed fluxes of neutrinos from the sun is not caused by errors in the models. However, the GONG data reveal subtle errors in the models, such as an excess in sound speed just beneath the convection zone. These discrepancies indicate effects that have so far not been correctly accounted for; for example, it is plausible that the sound-speed differences reflect weak mixing in stellar interiors, of potential importance to the overall evolution of stars and ultimately to estimates of the age of the galaxy based on stellar evolution calculations.  相似文献   

Modeling the Exchanges of Energy, Water, and Carbon Between Continents and the Atmosphere   总被引：19，自引：0，他引：19  

PJ Sellers  RE Dickinson  DA Randall  AK Betts  FG Hall  JA Berry  GJ Collatz  AS Denning  HA Mooney  CA Nobre  N Sato  CB Field  A Henderson-Sellers 《Science (New York, N.Y.)》1997,275(5299):502-509

Atmospheric general circulation models used for climate simulation and weather forecasting require the fluxes of radiation, heat, water vapor, and momentum across the land-atmosphere interface to be specified. These fluxes are calculated by submodels called land surface parameterizations. Over the last 20 years, these parameterizations have evolved from simple, unrealistic schemes into credible representations of the global soil-vegetation-atmosphere transfer system as advances in plant physiological and hydrological research, advances in satellite data interpretation, and the results of large-scale field experiments have been exploited. Some modern schemes incorporate biogeochemical and ecological knowledge and, when coupled with advanced climate and ocean models, will be capable of modeling the biological and physical responses of the Earth system to global change, for example, increasing atmospheric carbon dioxide.  相似文献   

猪的湿喂方式     

Peter Best  程宗佳 《饲料研究》2009,(10)

谷物价格一路走高,给饲料成本带来了空前的压力,在这种情况下,依靠泵和管道的生长肥育猪湿喂方式再次引起人们的关注.目前,北欧使用这种湿喂方式的养殖者数量已达到历史新高,并且这种饲喂模式已逐渐进入亚洲和欧洲市场.  相似文献   

FACTORS AFFECTING THE INSULIN CONTENT OF PANCREAS     

Haist RE  Best CH 《Science (New York, N.Y.)》1940,91(2365):410-411

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Acquired pyloric stenosis and gastric retention in a mare     

JA LAING  DR HUTCHINS 《Australian veterinary journal》1992,69(3):68-69

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Maple syrup urine disease in calves: a clinical, pathological and biochemical study   总被引：3，自引：0，他引：3  

PAW HARPER  JA DENNIS  PJ HEALY  GK BROWN† 《Australian veterinary journal》1989,66(2):46-49

The clinical, pathological and biochemical findings of a study of 30 Poll Hereford, Hereford, Poll Hereford cross or Hereford cross calves affected with branched chain ketoacid dehydrogenase (BCKAD) complex deficiency or maple syrup urine disease (MSUD) are presented. In breeding studies, 6 of 21 calves from obligate heterozygote matings were affected with MSUD, suggesting the disease is inherited in an autosomal recessive manner. Calves were clinically affected from birth, but there were variations in the subsequent course of progressive deterioration of central nervous system function. Concentrations of the branched chain amino acids and keto acids were elevated in pre-suckle plasma and cerebellar water content was higher in affected calves. Activity of BCKAD complex was minimal in fibroblasts cultured from an affected calf. Spongiform encephalopathy and elevated ratios of the branched to straight chain amino acids in formalin fixed cerebral tissue were found in a stillborn foetus and a 3-month-old Hereford calf. These findings suggest the disease occurs prenatally and that a delayed form may exist.  相似文献   

The efficacy of fenbendazole in the control of immature strongyle infections in ponies     

J L Duncan  D G McBeath  J M Best  N K Preston 《Equine veterinary journal》1977,9(3):146-149

The efficacy of fenbendazole against immature stages of Trichonema spp., Strongylus vulgaris and Strongylus edentatus was evaluated. Naturally infected 6 to 12 month old ponies were given single, oral doses of 0, 15, 30 and 60 mg/kg of body weight. A dose response relationship was noted between increasing dose levels and efficiency against larval trichonemes and migrating stages of S. vulgaris and S. edentatus. Dose levels of 30 mg/kg and higher removed 93 per cent of mucosal stages of Trichonema spp., while doses of 60 mg/kg removed 83 per cent and 89 per cent of the migrating larvae of S. vulgaris and S. edentatus respectively.  相似文献   

AN INDIRECT HAEMOLYSIS TEST (IHLT) FOR BOVINE BRUCELLOSIS   总被引：7，自引：0，他引：7  

P. Plackett B.A.  Ph.D.    G. S. Cottew M.Sc.  Susan J. Best A.A.I.M.T. 《Australian veterinary journal》1976,52(3):136-140

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Disinfection of liquid dung. 1. Disinfection tests on Salmonella in liquid dung from cattle     

E Best  A Amberger  D Strauch  W Müller  A Wünsch 《Berliner und Münchener tier?rztliche Wochenschrift》1971,84(22):429-436

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Yellow Tags, Green Paint, and Forms in Triplicate          下载免费PDF全文

Best JP 《The Canadian veterinary journal. La revue veterinaire canadienne》1963,4(8):193-195

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