Replacement of the hypopharynx and oesophagus by a prosthesis in pigs     

N G McGuire 《Research in veterinary science》1973,14(3):358-363

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Plasma silicon and radiographic bone density in weanling quarter horses fed sodium zeolite A1     

K.S. Frey BS  G.D. Potter PhD  T.W. Odom PhD  D.M. Senor MA  V.D. Reagan BS  V.H. Weir ARRT  J. Elslander RVT  S.P. Webb MS  E.L. Morris DVM  W.B. Smith PhD  K.E. Weigand PhD 《Journal of Equine Veterinary Science》1992,12(5)

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Composition of a polysaccharide from mycoplasma (F-38) recognised by antibodies from goats with contagious pleuropneumonia   总被引：4，自引：0，他引：4  

F R Rurangirwa  T C McGuire  N S Magnuson  A Kibor  S Chema 《Research in veterinary science》1987,42(2):175-178

A polysaccharide was extracted by warm aqueous phenol from the F-38 strain of mycoplasma which causes contagious caprine pleuropneumonia (CCPP). After acid hydrolysis, the polysaccharide was found to be composed of the neutral sugars glucose, galactose, mannose and fucose and the amino sugars galactosamine and glucosamine. All the sugars were present in approximately equal quantities. Unmodified goat erythrocytes bound the polysaccharide readily and the sensitised cells reacted with antibodies in sera from goats with experimental or natural CCPP. The unique composition of the F-38 polysaccharide and the specific reactivity of polysaccharide-sensitised red cells with antibodies from CCPP infected animals suggests that the polysaccharide should be useful for identification of F-38 organisms and diagnosis of the disease.  相似文献   

The transfer of serum IgG1 antibody into the gastrointestinal tract in newborn calves     

T E Besser  T C McGuire  C C Gay 《Veterinary immunology and immunopathology》1987,17(1-4):51-56

Transfer of functional blood IgG1 to the gastrointestinal tract was measured in neonatal calves. Radiolabelled immunoglobulin G1 (IgG1) anti-DNP antibody was administered to 2 day old calves by intravenous injection. The serum clearance rate was measured and was compared to the rate of protein-bound 125I excretion in the feces over a 10 day period to determine the importance of transfer to the gastrointestinal tract as a mechanism of serum IgG1 clearance. The amount of protein-bound and DNP-binding 125I present in the gastrointestinal tract of 10 day old calves at necropsy was also measured. Fecal excretion of protein-bound 125I accounted for 32% of the serum 125I-IgG1 clearance. Protein-bound 125I was present in the gastrointestinal tract at necropsy in amounts estimated to account for 68% of the total 125I-IgG1 clearance, and retained 65% of the DNP-binding ability of the original antibody. The discrepancy between the fecal excretion (32% of total IgG1 clearance) and the GI clearance estimated from protein-bound 125I in the gut (68% of total IgG1 clearance) is explained in part by IgG1 proteolysis occurring after transfer to the gastrointestinal tract but before fecal excretion. These results indicate that transfer to the calf gastrointestinal tract accounts for most IgG1 clearance in young calves, and that the intestinal antibody retains antigen binding function and may contribute to intestinal immunity.  相似文献   

Contribution of increasing CO2 and climate to carbon storage by ecosystems in the United States   总被引：2，自引：0，他引：2  

Schimel D  Melillo J  Tian H  McGuire AD  Kicklighter D  Kittel T  Rosenbloom N  Running S  Thornton P  Ojima D  Parton W  Kelly R  Sykes M  Neilson R  Rizzo B 《Science (New York, N.Y.)》2000,287(5460):2004-2006

The effects of increasing carbon dioxide (CO2) and climate on net carbon storage in terrestrial ecosystems of the conterminous United States for the period 1895-1993 were modeled with new, detailed historical climate information. For the period 1980-1993, results from an ensemble of three models agree within 25%, simulating a land carbon sink from CO2 and climate effects of 0.08 gigaton of carbon per year. The best estimates of the total sink from inventory data are about three times larger, suggesting that processes such as regrowth on abandoned agricultural land or in forests harvested before 1980 have effects as large as or larger than the direct effects of CO2 and climate. The modeled sink varies by about 100% from year to year as a result of climate variability.  相似文献   

Energetic charged particles in the uranian magnetosphere     

Stone EC  Cooper JF  Cummings AC  McDonald FB  Trainor JH  Lal N  McGuire R  Chenette DL 《Science (New York, N.Y.)》1986,233(4759):93-97

During the encounter with Uranus, the cosmic ray system on Voyager 2 measured significant fluxes of energetic electrons and protons in the regions of the planets magnetosphere where these particles could be stably trapped. The radial distribution of electrons with energies of megaelectron volts is strongly modulated by the sweeping effects ofthe three major inner satellites Miranda, Ariel, and Umbriel. The phase space density gradient of these electrons indicates that they are diffusing radially inward from a source in the outer magnetosphere or magnetotail. Differences in the energy spectra of protons having energies of approximately 1 to 8 megaelectron volts from two different directions indicate a strong dependence on pitch angle. From the locations of the absorption signatures observed in the electron flux, a centered dipole model for the magnetic field of Uranus with a tilt of 60.1 degrees has been derived, and a rotation period of the planet of 17.4 hours has also been calculated. This model provides independent confirmaton of more precise determinations made by other Voyager experiments.  相似文献   

Comparison of phenotypic and genotypic methods for the species identification of coagulase-negative staphylococcal isolates from bovine intramammary infections     

Joo Youn Park  Lawrence K. Fox  Keun Seok Seo  Mark A. McGuire  Yong Ho Park  Fred R. Rurangirwa  William M. Sischo  Gregory A. Bohach 《Veterinary microbiology》2011,147(1-2):142-148

Coagulase-negative staphylococci (CNS) are the most frequently isolated pathogens from cows with intramammary infection (IMI). Although API STAPH ID 20, a commercially available identification system, and PCR-restriction fragment length polymorphism (PCR-RFLP) of the gap gene (gap PCR-RFLP) have been successfully applied for the identification of CNS isolates from human specimens, their accuracy in the identification of veterinary isolates has not been fully established. In this study, we identified 263 CNS isolates from bovine IMI at species level by partial 16S rRNA gene sequence analysis as the definitive test. Species identification obtained using partial 16S rRNA gene sequence analysis was compared to results from the API STAPH ID 20 and gap PCR-RFLP analysis. Eleven different CNS species were identified by partial 16S rRNA gene sequence analysis. Only 76.0% (200/263) of the species identification results obtained by API STAPH ID 20 matched those obtained by partial 16S rRNA gene sequence analysis, whereas 97.0% (255/263) of the species identification results obtained by the gap PCR-RFLP analysis matched those obtained by partial 16S rRNA gene sequence analysis. The gap PCR-RFLP analysis could be a useful and reliable alternative method for the species identification of CNS isolates from bovine IMI and appears to be a more accurate method of species identification than the API STAPH ID 20 system.  相似文献   

Human breast cancer: correlation of relapse and survival with amplification of the HER-2/neu oncogene   总被引：160，自引：0，他引：160  

D J Slamon  G M Clark  S G Wong  W J Levin  A Ullrich  W L McGuire 《Science (New York, N.Y.)》1987,235(4785):177-182

The HER-2/neu oncogene is a member of the erbB-like oncogene family, and is related to, but distinct from, the epidermal growth factor receptor. This gene has been shown to be amplified in human breast cancer cell lines. In the current study, alterations of the gene in 189 primary human breast cancers were investigated. HER-2/neu was found to be amplified from 2- to greater than 20-fold in 30% of the tumors. Correlation of gene amplification with several disease parameters was evaluated. Amplification of the HER-2/neu gene was a significant predictor of both overall survival and time to relapse in patients with breast cancer. It retained its significance even when adjustments were made for other known prognostic factors. Moreover, HER-2/neu amplification had greater prognostic value than most currently used prognostic factors, including hormonal-receptor status, in lymph node-positive disease. These data indicate that this gene may play a role in the biologic behavior and/or pathogenesis of human breast cancer.  相似文献   

THE ZIA MESA AND RUINS     

Reagan AB 《Science (New York, N.Y.)》1909,30(777):713-714

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Results of research survey     

Reagan MD 《Science (New York, N.Y.)》1968,160(3823):14

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