Experimental transmission of jaagsiekte (ovine pulmonary adenomatosis) to goats   总被引：1，自引：0，他引：1  

R C Tustin  A L Williamson  D F York  D W Verwoerd 《The Onderstepoort journal of veterinary research》1988,55(1):27-32

Jaagsiekte was successfully transmitted to at least 2 out of 6 goats inoculated intratracheally with partially purified jaagsiekte retrovirus. Multiple, small, well circumscribed nodules found in the lungs consisted of typical papilliform proliferations of neoplastic Type II epithelial cells. Histological evidence of a mild interstitial pneumonia in 4 of the experimental animals can probably be attributed to a contaminating lentivirus in the jaagsiekte retrovirus preparation, as suggested by the seroconversion of the animals.  相似文献   

Combined viral and bacterial antigens for canine vaccines     

C J York 《Journal of the American Veterinary Medical Association》1966,149(5):681-685

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Comments on WHO swine viral reagents     

C J York 《Journal of the American Veterinary Medical Association》1972,160(4):665-666

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The relationship of subsequent racing performance to foreleg flight patterns during racing speed workouts of unraced 2-year-old Thoroughbred racehorses at auctions     

Jeffrey A. Seder AB  MBA  JD  Charles E. Vickery III BS 《Journal of Equine Veterinary Science》2005,25(12):505-522

Workouts of 980 unraced 2-year-old Thoroughbred racehorses at major U.S. auctions were videotaped using digital high-speed video equipment (ie, slow motion) and studied for signs of extraneous foreleg motion.^a Extraneous foreleg motion included, but was not limited to: 1) hyper rotation of the cannon bone on an axis parallel to the plane of the running surface (ie, moving in sagittal plane; hoof hitting an elbow in extreme cases) and perpendicular to the direction of the racetrack longitudinally; and 2) foreleg flight patterns not symmetrical and/or not parallel to the vector of the forward momentum of the horse's center of gravity (eg, winging, paddling, and/or wobbling at joints). Experienced Thorough bred racehorse industry videographers and gait analysis researchers were trained and used as film reviewers who rated foreleg motion on a scale of 1 to 5, with 1 indicating little or no extraneous motion, 3.5 indicating average extraneous motion (relative to the other unraced 2-year-olds at these auctions and to more than 20,000 similar horses at similar auctions over the past 10 years), and 5 indicating extreme extraneous motion (ie, at least 1 standard deviation or more from the mean). Because these were subjective ratings, only the more extreme rankings were used for comparison purposes in this study—that is, a minority (15.3%) of the overall study population.

A group of 73 horses with “good” foreleg motion had ratings from 1 to 3. A group of 77 horses with “bad” foreleg motion had ratings from 4 to 5. The subsequent North American racing performance of horses with good and bad foreleg motion was compared. Both groups had similar average velocity and similar distribution patterns of the velocities of the workouts, so the differences between the groups that are discussed in this study were not caused by different overall workout velocities.

Extraneous foreleg motion was shown to be related to subsequent racing earnings and the level of racing competition achieved. Horses with good foreleg motion (as defined herein) earned more and had greater stakes-level success than horses with bad foreleg motion. For example, the median earnings per start of horses with good foreleg motion was 83% higher than those of horses with bad foreleg motion, and horses with good foreleg motion were 58% more likely to win a top race (ie, one designated as a “graded” stakes) than horses with bad foreleg motion. However, the “good movers” raced less overall than the “bad movers.”

A secondary finding of this study is that although there is a widely held industry belief that horses with high action or bad foreleg motion are more suited to turf racing, horses with good foreleg motion were more likely than horses with bad foreleg motion to race at least once on turf, and, among horses to race on turf, horses with good foreleg motion were more likely than horses with bad foreleg motion to win and to finish “in the money” (ie, at least third).  相似文献   

WHAT IS YOUR DIAGNOSIS?     

KL BOSWARD  S RICH  JD WHITE  P MARTIN  R MALIK 《Australian veterinary journal》2006,84(3):82-82

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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   

Use of REP‐PCR and 16S rRNA gene sequencing for comparison of Mannheimia haemolytica isolates obtained from fatal cases of bovine respiratory disease in the USA and Australia     

JD Taylor  DJ Doyle  PJ Blackall  AW Confer 《Australian veterinary journal》2014,92(1-2):15-23

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High-Energy Charged Particles in the Innermost Jovian Magnetosphere     

HM Fischer  E Pehlke  G Wibberenz  LJ Lanzerotti  JD Mihalov 《Science (New York, N.Y.)》1996,272(5263):856-858

The energetic particles investigation carried by the Galileo probe measured the energy and angular distributions of the high-energy particles from near the orbit of Io to probe entry into the jovian atmosphere. Jupiter's inner radiation region had extremely large fluxes of energetic electrons and protons; intensities peaked at approximately2.2RJ (where RJ is the radius of Jupiter). Absorption of the measured particles was found near the outer edge of the bright dust ring. The instrument measured intense fluxes of high-energy helium ions (approximately62 megaelectron volts per nucleon) that peaked at approximately1.5RJ inside the bright dust ring. The abundances of all particle species decreased sharply at approximately1.35RJ; this decrease defines the innermost edge of the equatorial jovian radiation.  相似文献   

A role for nuclear inositol 1,4,5-trisphosphate kinase in transcriptional control     

Odom AR  Stahlberg A  Wente SR  York JD 《Science (New York, N.Y.)》2000,287(5460):2026-2029

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混合型主题公园国内游客游后评价研究——以重庆乐和乐都主题公园为例          下载免费PDF全文

刘德秀  王莉  秦翰  秦远好   《西南大学学报(自然科学版)》2017,39(2):107-113

游后评价直接影响游客的满意程度和重游行为,也决定着景区的生存与发展.问卷调查发现国内游客对重庆乐和乐都主题公园的游后评价一般(m=3.06),满意者为30%~40%,且具有初中等学历、中低收入、年轻的已婚男性游客的游后评价显著低于其他人口学特征的游客,表明乐和乐都的游乐项目、景区环境、配套设施以及员工服务还不能完全满足主体客源群体的需求.因此,优化游乐项目,完善配套设施,美化景区环境和强化员工培训是乐和乐都缩小差距,提升游客游后评价水平的基本路径.  相似文献