Protoporphyria in Limousin cattle     

PJ HEALY  L CAMILLERI  V POULOS  KG HART  BJ KEMP  RE MOORE  J DOOLEY  M WARNER 《Australian veterinary journal》1992,69(6):144-145

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Retropharyngeal lymph node infection in horses: 46 cases (1977–1992)     

LC GOLLAND  DR HODGSON  RE DAVIS  RJ RAWLINSON  MB COLLINS  SA McCLINTOCK  DR HUTCHINS 《Australian veterinary journal》1995,72(5):161-164

SUMMARY A retrospective study of 46 horses with retropharyngeal lymph node (RPLN) infection presented to the Rural Veterinary Centre between 1977 and 1992 was undertaken. Horses aged less than one year were most commonly represented (46%). Thirty-nine percent of cases had been exposed to horses with confirmed or suspected strangles (Streptococcus equi subsp equi infection) within the previous 8 weeks. Most frequent signs were unilateral or bilateral swelling of the throat region (65%), respiratory stertor/dyspnoea (35%), purulent nasal discharge (20%), inappetence and signs of depression (15%), and dysphagia (9%). All horses had a soft tissue density in the retropharyngeal region on radiographs. Rhinopharyngoscopy, ultrasonography, haematology as well as cytological and microbial analysis of material aspirated from the soft tissue swelling facilitated diagnosis in some horses. Fifteen horses (33%) were treated with procaine penicillin intramuscularly for 4 to 7 days followed by oral trimethoprim-sulphadimidine for 7 to 14 days. Non-steroidal anti-inflammatory drugs were administered to 6 horses. Four required tracheostomy for severe respiratory distress. The 15 horses treated medically responded to treatment and were discharged from hospital. Three horses (6%) with mild signs received no treatment and recovered uneventfully. Twenty-eight horses (61%) underwent general anaesthesia and surgical drainage of a RPLN abscess. Nineteen received procaine penicillin G for 4 to 7 days. Four of the nine horses that did not receive antibiotic treatment after surgery required further surgical drainage 10 days to 7 weeks after the initial surgery . Limited follow-up information was available for 37 horses. Thirty-two horses were considered to have made complete recovery, 3 horses had died through misadventure and 2 had been euthanased because of chronic ill-thrift .  相似文献   

G01Glupamid: a novel nutraceutical approach to canine and feline osteoarthritis     

A. MIOLO  P. BADINO  R. BARBERO  & G. RE 《Journal of veterinary pharmacology and therapeutics》2006,29(S1):202-203

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Thermal Structure of Jupiter's Upper Atmosphere Derived from the Galileo Probe     

A Seiff  DB Kirk  TCD Knight  LA Young  FS Milos  E Venkatapathy  JD Mihalov  RC Blanchard  RE Young  G Schubert 《Science (New York, N.Y.)》1997,276(5309):102-104

Temperatures in Jupiter's atmosphere derived from Galileo Probe deceleration data increase from 109 kelvin at the 175-millibar level to 900 ± 40 kelvin at 1 nanobar, consistent with Voyager remote sensing data. Wavelike oscillations are present at all levels. Vertical wavelengths are 10 to 25 kilometers in the deep isothermal layer, which extends from 12 to 0.003 millibars. Above the 0.003-millibar level, only 90- to 270- kilometer vertical wavelengths survive, suggesting dissipation of wave energy as the probable source of upper atmosphere heating.  相似文献   

Effects of Surface Oxidation and Oxygen on the Removal of Trichloroethylene From the Gas Phase Using Elemental Iron     

Uludag-Demirer  Sibel  Bowers  Alan R. 《Water, air, and soil pollution》2003,142(1-4):229-242

The reduction of trichloroethylene (TCE) in the gas phase byFe° was examined under water vapor saturatedconditions (relative humidity (RH) = 100%). The reactionconformed to first-order rate kinetics under anaerobic(N₂ atmosphere) conditions and acid-washedFe°exhibited a faster TCE removal rate than unamended (partially oxidized) Fe°, i.e., k_obs = 0.015 h^-1 versus0.012 h^-1. Analysis of the two types of Fe° showedthat 40.3% of the unamended Fe° surface was nonreactive. Experiments with iron oxides, which form commonly on the surface of Fe° exposed to humid air (magnetiteand maghemite), showed that these solids were nonreactive with TCE under anaerobic conditions. Under aerobic conditions (air),TCE reduction occurred in two distinct phases. There was a fastinitial rate followed by a slower later rate of reduction when the oxide layer was formed. Further experiments showed that theFe° surface was saturated with TCE at higher concentrations (K_1/2 = 5,397.4 ± 345.4 ppmv) and thatoxygen acted as an irreversible inhibitor of TCE reduction(maximum rate of reaction decreased when oxygen was present).  相似文献   

Spatial Response of Mammals to Late Quaternary Environmental Fluctuations     

RW Graham  EL Lundelius  MA Graham  EK Schroeder  RS Toomey  E Anderson  AD Barnosky  JA Burns  CS Churcher  DK Grayson  RD Guthrie  CR Harington  GT Jefferson  LD Martin  HG McDonald  RE Morlan  HA Semken  SD Webb  L Werdelin  MC Wilson 《Science (New York, N.Y.)》1996,272(5268):1601-1606

Analyses of fossil mammal faunas from 2945 localities in the United States demonstrate that the geographic ranges of individual species shifted at different times, in different directions, and at different rates in response to late Quaternary environmental fluctuations. The geographic pattern of faunal provinces was similar for the late Pleistocene and late Holocene, but differing environmental gradients resulted in dissimilar species composition for these biogeographic regions. Modern community patterns emerged only in the last few thousand years, and many late Pleistocene communities do not have modern analogs. Faunal heterogeneity was greater in the late Pleistocene.  相似文献   

Single-molecule DNA sequencing of a viral genome   总被引：4，自引：0，他引：4  

Harris TD  Buzby PR  Babcock H  Beer E  Bowers J  Braslavsky I  Causey M  Colonell J  Dimeo J  Efcavitch JW  Giladi E  Gill J  Healy J  Jarosz M  Lapen D  Moulton K  Quake SR  Steinmann K  Thayer E  Tyurina A  Ward R  Weiss H  Xie Z 《Science (New York, N.Y.)》2008,320(5872):106-109

The full promise of human genomics will be realized only when the genomes of thousands of individuals can be sequenced for comparative analysis. A reference sequence enables the use of short read length. We report an amplification-free method for determining the nucleotide sequence of more than 280,000 individual DNA molecules simultaneously. A DNA polymerase adds labeled nucleotides to surface-immobilized primer-template duplexes in stepwise fashion, and the asynchronous growth of individual DNA molecules was monitored by fluorescence imaging. Read lengths of >25 bases and equivalent phred software program quality scores approaching 30 were achieved. We used this method to sequence the M13 virus to an average depth of >150x and with 100% coverage; thus, we resequenced the M13 genome with high-sensitivity mutation detection. This demonstrates a strategy for high-throughput low-cost resequencing.  相似文献   

Antiallatotropins: inhibition of corpus allatum development     

Bowers WS  Martinez-Pardo R 《Science (New York, N.Y.)》1977,197(4311):1369-1371

Treatment of newly eclosed adult milkweed bug (Oncopeltus fasciatus) females with precocene 2 prevents secretion of juvenile hormone by inhibition of postimaginal development of the corpus allatum. Ovarian development which is dependent upon juvenile hormone is prevented or reversed, depending upon the timing of precocene treatment. Juvenile hormone secretion is shown to be related to the development of the corpus allatum.  相似文献   

Diameter-Selective Raman Scattering from Vibrational Modes in Carbon Nanotubes   总被引：1，自引：0，他引：1  

AM Rao  E Richter  S Bandow  B Chase  PC Eklund  KA Williams  S Fang  KR Subbaswamy  M Menon  A Thess  RE Smalley  G Dresselhaus  MS Dresselhaus 《Science (New York, N.Y.)》1997,275(5297):187-191

Single wall carbon nanotubes (SWNTs) that are found as close-packed arrays in crystalline ropes have been studied by using Raman scattering techniques with laser excitation wavelengths in the range from 514.5 to 1320 nanometers. Numerous Raman peaks were observed and identified with vibrational modes of armchair symmetry (n, n) SWNTs. The Raman spectra are in good agreement with lattice dynamics calculations based on C-C force constants used to fit the two-dimensional, experimental phonon dispersion of a single graphene sheet. Calculated intensities from a nonresonant, bond polarizability model optimized for sp2 carbon are also in qualitative agreement with the Raman data, although a resonant Raman scattering process is also taking place. This resonance results from the one-dimensional quantum confinement of the electrons in the nanotube.  相似文献   

Single-Electron Transport in Ropes of Carbon Nanotubes     

M Bockrath  DH Cobden  PL McEuen  NG Chopra  A Zettl  A Thess  RE Smalley 《Science (New York, N.Y.)》1997,275(5308):1922-1925

The electrical properties of individual bundles, or "ropes," of single-walled carbon nanotubes have been measured. Below about 10 kelvin, the low-bias conductance was suppressed for voltages less than a few millivolts. In addition, dramatic peaks were observed in the conductance as a function of a gate voltage that modulated the number of electrons in the rope. These results are interpreted in terms of single-electron charging and resonant tunneling through the quantized energy levels of the nanotubes composing the rope.  相似文献