Meningo-encephalitis in two gnotobiotic calves infected intranasally and orally with infectious bovine rhinotracheitis virus   总被引：1，自引：0，他引：1  

N Edington  G J Christofinis  A O Betts 《Research in veterinary science》1972,13(3):292-293

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Concepts for the clinical use of stem cells in equine medicine   总被引：1，自引：1，他引：0  

Thomas G. Koch  Lise C. Berg    Dean H. Betts 《The Canadian veterinary journal. La revue veterinaire canadienne》2008,49(10):1009-1017

Stem cells from various tissues hold great promise for their therapeutic use in horses, but so far efficacy or proof-of-principle has not been established. The basic characteristics and properties of various equine stem cells remain largely unknown, despite their increasingly widespread experimental and empirical commercial use. A better understanding of equine stem cell biology and concepts is needed in order to develop and evaluate rational clinical applications in the horse. Controlled, well-designed studies of the basic biologic characteristics and properties of these cells are needed to move this new equine research field forward. Stem cell research in the horse has exciting equine specific and comparative perspectives that will most likely benefit the health of horses and, potentially, humans.  相似文献   

The landscape ecology of pollination     

Betts  Matthew G.  Hadley  Adam S.  Kormann  Urs 《Landscape Ecology》2019,34(5):961-966

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Forest fragmentation affects step choices,but not homing paths of fragmentation-sensitive birds in multiple behavioral states     

Valente  Jonathon J.  Fischer  Richard A.  Ryder  T. Brandt  Betts  Matthew G. 《Landscape Ecology》2019,34(2):373-388

Landscape Ecology - Theory predicts that movement limitation due to landscape fragmentation can reduce population viability. Understanding how landscape heterogeneity influences movement is thus...  相似文献   

Experimental evidence that simplified forest structure interacts with snow cover to influence functional connectivity for Pacific martens     

Katie M. Moriarty  Clinton W. Epps  Matthew G. Betts  Dalton J. Hance  J. D. Bailey  William J. Zielinski 《Landscape Ecology》2015,30(10):1865-1877

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In vitro developmental potential of nuclear transfer embryos cloned with enucleation methods using pre-denuded bovine oocytes     

Jeon BG  Betts DH  King WA  Rho GJ 《Reproduction in domestic animals》2011,46(6):1035-1042

Enucleation of a recipient oocyte is an important essential process in the procedure of somatic cell nuclear transfer (SCNT). The present study investigated a method for the improvement of enucleation efficiency. Oocytes were denuded of cumulus cells before the completion of nuclear maturation (pre-denuded) after 12 h of culture at MI stage and subsequently cultured for additional 6 h until the completion of nuclear maturation and extrusion of the first polar body (PB1). The extrusion rate of PB1 was not significantly different in the pre-denuded oocyte group, compared with control oocyte group matured for 18 h. However, the number of oocytes showing the metaphase II (MII) located just underneath the PB1 was significantly higher (p<0.05) in the pre-denuded oocyte group than those in control oocyte group. To test the effect of pre-denuding on the enucleation rate and developmental potential of embryos to blastocyst stage, subsequent somatic cell nuclear transfer comparisons were made with three different methods of enucleation at MII stage using vital dyes (demicoline and Hoescht) or the PB1 (blind enucleation) to localize the chromosome plate. Enucleation rate of the oocytes with demicoline, Hoechst and pre-denuding enucleation groups were significantly higher (p<0.05) than those of blind enucleation groups. However, cleavage rate to two-cell stage and, developmental rate to blastocyst and hatched blastocyst stage, the mean numbers of total and ICM cells in the SCNT embryos with Hoechst enucleation groups were significantly decreased (p<0.05), compared to those of blind, demicoline and pre-denuding enucleation groups. Moreover, the level of telomerase activity was also significantly (p<0.05) decreased in SCNT blastocysts of Hoechst enucleation group, compared to those of blind, demicoline and pre-denuding enucleation groups. Taken together, pre-denuding enucleation group using pre-denuded oocytes was a useful and simple enucleation method for bovine SCNT embryos.  相似文献   

Multinucleate erythrocytes in a brown kiwi (Apteryx mantelli)     

EKP Jillings  BD Gartrell  KJ Morgan  DH Hopcroft 《New Zealand veterinary journal》2013,61(2)

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Membrane toxicity of antimicrobial compounds from essential oils   总被引：2，自引：0，他引：2  

Di Pasqua R  Betts G  Hoskins N  Edwards M  Ercolini D  Mauriello G 《Journal of agricultural and food chemistry》2007,55(12):4863-4870

Natural antimicrobial compounds perform their action mainly against cell membranes. The aim of this work was to evaluate the interaction, meant as a mechanism of action, of essential oil antimicrobial compounds with the microbial cell envelope. The lipid profiles of Escherichia coli O157:H7, Staphylococcus aureus, Salmonella enterica serovar Typhimurium, Pseudomonas fluorescens, and Brochothrix thermosphacta cells treated with thymol, carvacrol, limonene, eugenol, and cinnamaldehyde have been analyzed by gas chromatography. In line with the fatty acids analysis, the treated cells were also observed by scanning electron microscopy (SEM) to evaluate structural alterations. The overall results showed a strong decrease of the unsaturated fatty acids (UFAs) for the treated cells; in particular, the C18:2trans and C18:3cis underwent a notable reduction contributing to the total UFA decreases, while the saturated fatty acid C17:0 raised the highest concentration in cinnamaldehyde-treated cells. SEM images showed that the used antimicrobial compounds quickly exerted their antimicrobial activities, determining structural alterations of the cell envelope.  相似文献   

Complement-fixation tests in the diagnosis of enzootic pneumonia of pigs. I. Experimental studies   总被引：2，自引：0，他引：2  

R T Hodges  A O Betts 《The Veterinary record》1969,84(17):452-455

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Complement-fixation tests in the diagnosis of enzootic pneumonia of pigs. II. Field studies     

R T Hodges  A O Betts 《The Veterinary record》1969,84(17):455-458

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