Bartonella henselae in canine cavitary effusions: prevalence,identification, and clinical associations          下载免费PDF全文

Amy L. Weeden  Natalie A. Cherry  Edward B. Breitschwerdt  Avery G. Cheves  Heather L. Wamsley 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2017,46(2):326-330

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Effect of Simulated Tree-well vs Avalanche Snow Burial on Core Temperature Cooling Rate     

Nicholas Kanaan  Joseph Krakker  Heather Beasley  Jeffrey Sorensen  Scott McIntosh  Colin Grissom 《The Forestry Chronicle》2017,28(4):365-366

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Reaction of glucosinolate-myrosinase defence system in <Emphasis Type="Italic">Brassica</Emphasis> plants to pathogenicity factor of <Emphasis Type="Italic">Sclerotinia sclerotiorum</Emphasis>     

Siamak Rahmanpour  David Backhouse  Heather M. Nonhebel 《European journal of plant pathology / European Foundation for Plant Pathology》2010,128(4):429-433

The glucosinolate-myrosinase defence system, specific to Brassicales plants, produces toxic volatile compounds during mechanical injury or pathogen attack. The reaction of this system to oxalic acid, known as a pathogenicity factor of Sclerotinia sclerotiorum, is not fully understood. The hydrolysis of glucosinolates was studied at varying conditions in the presence of oxalic acid in the substrate. In a bioassay, colonies of the pathogen were exposed to volatiles from hydrated mustard powder used as a myrosinase and glucosinolate source. The glucosinolate-myrosinase (GSL-M) system was activated in the presence of oxalic acid at a concentration and pH similar to that expected in vivo. Volatile production was inhibited only when the pH fell to 3 or below. It is unlikely that oxalic acid plays a significant role in disarming the GSL-M system during infection of Brassica hosts.  相似文献   

Diagnostic imaging in veterinary dental practice. Dens invaginatus leading to arrested maturation of the right and left mandibular first molar teeth     

Duncan HL 《Journal of the American Veterinary Medical Association》2010,237(11):1251-1253

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Archaeology. Using old insects to sleuth out new clues to ancient cultures     

Pringle H 《Science (New York, N.Y.)》2010,330(6005):752-753

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Safety and efficacy of high‐dose fomepizole compared with ethanol as therapy for ethylene glycol intoxication in cats     

Heather E. Connally MS  DVM  DACVECC  Mary Anna Thrall DVM  MS  DACVP  Dwayne W. Hamar PhD 《Journal of Veterinary Emergency and Critical Care》2010,20(2):191-206

Objective – To determine the safety and efficacy of high‐dose fomepizole compared with ethanol (EtOH) in cats with ethylene glycol (EG) toxicosis. Design – Prospective study. Setting – University veterinary research laboratory. Animals – Thirteen cats. Interventions – Two cats received injections of high‐dose fomepizole (Study 1). Three cats received lethal doses of EG and fomepizole treatment was initiated 1, 2, or 3 hours later (Study 2). Eight cats received a lethal dose of EG and were treated with fomepizole or EtOH (Study 3). Cats treated with fomepizole received 125 mg/kg IV initially, then 31.25 mg/kg at 12, 24, and 36 hours. Cats treated with EtOH received 5 mL of 20% EtOH/kg IV initially, then every 6 hours for 5 treatments, then every 8 hours for 4 treatments. Cats also received fluids and supportive therapy as needed. Measurements and Main Results – Clinical signs were monitored and serial blood analyses performed. Cats receiving fomepizole experienced mild sedation but no biochemical evidence of toxicity. Cats receiving fomepizole for EG intoxication survived if therapy was initiated within 3 hours of EG ingestion. One of the 6 developed acute renal failure (ARF) but survived. Only 1 of the 3 cats treated with EtOH 3 hours following EG ingestion survived; 2 developed ARF and were euthanized. Cats treated 4 hours following EG ingestion developed ARF, whether treated with EtOH or fomepizole. Conclusions – Fomepizole is safe when administered to cats in high doses, prevents EG‐induced fatal ARF when therapy is instituted within 3 hours of EG ingestion, and is more effective than treatment with EtOH.  相似文献   

Changes in light levels and stream temperatures with loss of eastern hemlock (Tsuga canadensis) at a southern Appalachian stream: Implications for brook trout     

Leigh A. Siderhurst  Heather P. Griscom  Mark Hudy  Zachary J. Bortolot 《Forest Ecology and Management》2010

The exotic invasive insect, hemlock woolly adelgid (Adelges tsugae Annand), is causing mortality in eastern hemlocks (Tsuga canadensis [L.] Carr.) throughout the eastern U.S. Because hemlocks produce dense shade, and are being replaced by hardwood species that produce less shade, their loss may increase understory light levels. In the southern Appalachians, increases in light could increase stream temperatures, threatening species such as brook trout (Salvelinus fontinalis). We studied changes in light and stream temperature with eastern hemlock decline at a headwater southern Appalachian brook trout stream. Our results indicate that stream light levels have increased significantly with adelgid infestation. Leaf-on light levels are currently significantly higher (P < 0.02) in plots containing high basal areas of hemlock (mean global site factor (GSF)(SE) = 0.267(0.01)) compared with plots containing no hemlock (mean GSF(SE) = 0.261(0.01)), suggesting that increases in light have occurred with hemlock decline. The Normalized Difference Vegetation Index (NDVI), a remotely sensed metric of vegetation density, decreased with hemlock decline from 2001 to 2008. In 2001, NDVI showed no relationship (R² = 0.003; F = 0.14; P = 0.71) with hemlock basal area, but by 2008, there was a significant negative relationship (R² = 0.352; F = 19.55; P < 0.001) between NDVI and hemlock basal area. A gap experiment showed that light levels may increase by up to 64.7% more (mean increase in GSF = 27.5%) as hemlocks fall, creating gaps in the canopy. However, stream temperatures did not increase with hemlock decline during the study period, and we found that ground water inputs have a stronger influence on water temperature than light levels at this site. Linear regression showed a significant negative relationship between water temperature and proximity to ground water sources (R² = 0.451; F = 13.14; P = 0.002), but no relationship between water temperature and light levels (R² < 0.02; P > 0.05). In addition, by comparing light levels between plots containing hemlock and those containing only hardwoods, we found that if hemlocks are replaced by hardwoods, light levels under an all-hardwood canopy (mean GSF(SE) = 0.240(0.005)) are unlikely to be higher than they are under the current forest (mean GSF(SE) = 0.254(0.007)). These results suggest that loss of hemlock along southern Appalachian headwater streams could have short-term impacts on light levels, but that long-term changes in light levels, increases in water temperature, and adverse effects on brook trout may be unlikely.  相似文献   

Proteomic analysis of membrane preparations from developing Pinus radiata compression wood     

Mast S  Peng L  Jordan TW  Flint H  Phillips L  Donaldson L  Strabala TJ  Wagner A 《Tree physiology》2010,30(11):1456-1468

For coniferous gymnosperms, few data exist as to the contribution of the membrane-associated proteome to cell wall and wood formation. In this study, we begin to address this knowledge deficiency by examining the proteomic profile of Golgi-enriched membrane preparations derived from developing Pinus radiata compression wood. These membrane preparations were generated by a combination of discontinuous sucrose gradient centrifugation and Triton X-114-based phase separation. Fractionation by phase separation removed contaminating proteins associated with the cytoskeleton and enabled the discrimination between soluble and membrane-bound/integral proteins. The proteomic analysis of the resulting aqueous and detergent phases using high-performance liquid chromatography-tandem mass spectrometry resulted in the identification of 175 proteins. The majority of the identified proteins were membrane bound/integral and originated from cellular components such as the nucleus, plastids, endoplasmic reticulum, plasma membrane and Golgi vesicles. On the basis of bioinformatic analysis, many of the identified proteins were predicted to be involved either in the regulation of wood formation or in cell wall biosynthesis, which indicated that the proteomic analysis of non-cytosolic proteins in developing xylem is a useful strategy to investigate the molecular aspects of wood formation in pine.  相似文献   

Influence of Three Aquatic Macrophytes on Mitigation of Nitrogen Species from Agricultural Runoff   总被引：1，自引：0，他引：1  

Heather L. Tyler  Matthew T. Moore  Martin A. Locke 《Water, air, and soil pollution》2012,223(6):3227-3236

Agricultural runoff containing nitrogen fertilizer is a major contributor to eutrophication in aquatic systems. One method of decreasing amounts of nitrogen entering rivers or lakes is the transport of runoff through vegetated drainage ditches. Vegetated drainage ditches can enhance the mitigation of nutrients from runoff; however, the efficiency of nitrogen removal can vary between plant species. The efficiency of three aquatic macrophytes, cutgrass (Leersia oryzoides), cattail (Typha latifolia), and bur-reed (Sparganium americanum), to mitigate dissolved and total nitrogen from water was investigated. Replicate mesocosms of each plant species were exposed to flowing water enriched with ammonium and nitrate for 6?h, allowed to remain stagnant for 42?h, and then flushed with non-enriched water for an additional 6?h to simulate a second storm event. After termination of the final simulated runoff, all vegetated treatments lowered total nitrogen loads exiting mesocosms by greater than 50%, significantly more than unvegetated controls, which only decreased concentrations by 26.9% (p????0.0023). L. oryzoides and T. latifolia were more efficient at lowering dissolved nitrogen, decreasing ammonium by 42?±?9% and 59?±?4% and nitrate by 67?±?6% and 64?±?7%, respectively. All treatments decreased ammonium and nitrate concentrations within mesocosms by more than 86% after 1?week. However, T. latifolia and L. oryzoides absorbed nitrogen more rapidly, lowering concentrations by greater than 98% within 48?h. By determining the nitrogen mitigation efficiency of different vegetative species, plant communities in agricultural drainage ditches can be managed to significantly increase their remediation potential.  相似文献   

Exploring National Veterinary Information Outreach     

Thomas Derek Halling  Heather K. Moberly  Cathy Pepper  Esther Carrigan 《Journal Of Agricultural & Food Information》2014,15(4):282-294

The Medical Sciences Library at Texas A&M University (MSL) participates in the National Library of Medicine (NLM) National Network of Libraries of Medicine South Central Region (NN/LM) Regional Resource Library outreach initiative. This program generally funds regional outreach activities promoting NLM information resources. The MSL and veterinary library community recognized practicing clinical veterinarians as an underserved population. The 2013–2014 MSL outreach proposal combined traditional activities with the development of materials to assist veterinarians with NLM resources, and exhibit to a national audience. This article provides an overview of the NN/LM SCR Resource Library Outreach Awards, an overview of MSL outreach activities for the year, and lessons learned.  相似文献