A percutaneous transtracheal catheter system for improved oxygenation in foals with respiratory distress.     

A M Hoffman  L Viel 《Equine veterinary journal》1992,24(3):239-241

  相似文献   

Intake,digestibility, rumen protein synthesis,and growth performance of Malawi Zebu steers fed diets containing rangeland-based protein sources     

Chingala  Gregory  Raffrenato  Emiliano  Dzama  Kennedy  Hoffman  Louwrens C.  Mapiye  Cletos 《Tropical animal health and production》2019,51(1):199-204

Tropical Animal Health and Production - The study evaluated effects of feeding Malawi Zebu steers with diets containing baobab (Adansonia digitata) seed meal and white thorn tree (Vachellia...  相似文献   

Landowner Perceptions of Legal Liability for Using Prescribed Fire in the Southern Plains,United States     

Urs P. Kreuter  Dianne A. Stroman  Carissa L. Wonkka  John Weir  Alexandra A. Abney  James K. Hoffman 《Strength and Conditioning Journal》2019,72(6):959-967

Suppression of fire in the Southern Plains has led to proliferation of woody plants and fuel load accumulation that spurs wildfires. These effects have led to calls for widespread application of prescribed fire to reduce fuel loads, but there is substantial landowner resistance to the use of this land management tool. Here we explore factors that affect perceptions of landowners in the Southern Plains about prescribed fire liability and their willingness to apply this land management tool. This region was selected for the study because of the preponderance of private landholdings and widespread woody plant encroachment. The study used a mail survey of 1 853 landowners in 16 counties in Texas and Oklahoma, resulting in a data set from 680 respondents (37% useable response rate). Logistic regression models were developed to test three hypotheses relating to the likelihood that a landowner will apply prescribed fire. The study corroborated that landowners who perceived higher levels of fire-related legal liability were less likely to apply prescribed fire on their land or assist with its application on other properties. In addition, burn bans were found to inhibit landowner willingness to apply fire during periods that result in higher woody plant mortality. Oklahoma respondents, landowners who believed prescribed fire to be an affordable woody plant management tool, and members of prescribed burning associations (PBAs) were more likely to use prescribed fire. These results have important implications for policies aimed at overcoming resistance to the use of prescribed fire to curb woody plant encroachment and reduce fuel load accumulation. Specifically, language in state statutes pertaining to prescribed fire should be modified to reduce landowner concerns over legal liability; PBAs should be established more widely; and public cost-sharing funds for woody plant management should prioritize prescribed fire.  相似文献   

Effects of Growth Hormone on In Situ Culture of Bovine Preantral Follicles are Dose Dependent          下载免费PDF全文

CR Jimenez  JL de Azevedo  RG Silveira  J Penitente‐Filho  EL Carrascal‐Triana  AM Zolini  VR Araújo  CAA Torres 《Reproduction in domestic animals》2016,51(4):575-584

The objective of this study was to evaluate different concentrations of growth hormone (GH) on the development of bovine preantral follicles cultured included in the ovarian tissue (in situ) on the rates of morphologically normal, viable, primordial and developing follicles, as well as the oocyte and follicle diameter and ultrastructural analysis. Ovarian fragments collected from cows with no cross‐breeds defined were cultured in situ for 1 and 7 days in minimal essential medium (α‐MEM+) supplemented with different concentrations of recombinant human GH (0, 10, 25, 50 ng/ml). The ovarian fragments non‐cultured (control) and cultured were processed for classic histology, mechanical isolation and electron transmission microscopy (MET). The parameters underwent anova (Tukey′s and Dunnett′s tests) and chi‐square test (χ²). After 7 days of culture, the treatment with 50 ng/ml GH showed no differences with fresh control (p > 0.05) and had greater effectiveness than in the 0, 10 and 25 ng/ml GH concentrations of the morphologically normal follicles. Regarding the primordial follicles, a reduction was observed in the 50 ng/ml GH concentration concomitant with the significant increase in developing follicles, differing from both the fresh control and the other GH concentrations tested. In addition, 50 ng/ml GH showed a larger follicle and oocyte diameter when compared to the other treatments cultured. Similar structures were ultrastructurally observed in the control group, 50 ng/ml GH. Follicles cultured in 10 ng/ml GH showed nuclear invagination, vacuoles and lesioned basal membrane. Hence, it is concluded that 50 ng/ml GH is the most effective concentration for the development of preantral follicles cultured in situ.  相似文献   

Aboveground biomass production of a semi-arid southern African savanna: towards a new model     

Anthony R Palmer  Igshaan Samuels  Clement Cupido  Andiswa Finca  W Fransiska Kangombe  Isa AM Yunusa 《African Journal of Range and Forage Science》2016,33(1):43-51

Following a field campaign to determine the species composition, canopy cover, aboveground annual production and leaf area index (LAI) of the semi-arid savanna of north-western Namibia, we present a production model that can be used by graziers to determine the livestock carrying capacity. The model predicts the annual aboveground net primary production (ANPP) from regression equations of canopy cover by annual production fraction for plant functional classes. We tested the output of the model against another fully independent net primary production (NPP) model, namely the MODIS NPP product. The mean MODIS NPP for the 29 sites was 343 ± 22?kg dry matter (DM) ha^?1 y^?1 as opposed to 285 ± 142?kg DM ha^?1 y^?1 for the fAP model that used the regression method (p < 0.01). As a proof of concept, these landscape-scale ANPP values are used to calculate a recommended livestock carrying capacity for the Ehirovipuka Communal Conservancy, a 1 980 km² communal area with both wildlife and livestock populations. In addition, we also provide details of a field method for predicting landscape-scale LAI from line transect data. This approach can be used to ground reference the LAI values generated from the MODIS LAI product.  相似文献   

Diagnosis and ultrasonographic appearance of hepatic metastasis in six cases of canine appendicular osteosarcoma (2005–2013)          下载免费PDF全文

L Cesario  LD Garrett  AM Barger  RT O'Brien  TM Fan 《Australian veterinary journal》2016,94(5):160-165

  相似文献   

Negative pressure wound therapy using a portable single‐use device for free skin grafts on the distal extremity in seven dogs          下载免费PDF全文

AJ Miller  RG Cashmore  AM Marchevsky  M Havlicek  PM Brown  SM Fearnside 《Australian veterinary journal》2016,94(9):309-316

  相似文献   

Patent ductus arteriosus in a Holstein calf: A two-dimensional and Doppler echocardiographic study of the ductus arteriosus and validation          下载免费PDF全文

O'grady MR  Cockshutt JR  Khanna A  Kloeze HJ  Hoffman AM  Viel L 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(5):303-304

  相似文献   

Sporadic, severe bronchointerstitial pneumonia of foals   总被引：1，自引：1，他引：0       下载免费PDF全文

Prescott JF  Wilcock BP  Carman PS  Hoffman AM 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(7):421-425

Bronchointerstitial pneumonia was diagnosed postmortem in 19 foals in a 10 year retrospective study of submissions to a diagnostic center in Ontario. Mean age at death was 2.0 ± 0.05 (SEM) mo (range five days to four months). Fourteen of 19 were aged from 1.5 to 2.5 mo. Clinically, the disease was generally characterized by sudden onset of fever and increasingly severe dyspnea which developed into respiratory distress before death. Mean length of illness was 7.0 ± 0.33 days (range 1-21 days). The disease appeared to affect only individual foals on 19 different farms.

At postmortem, lungs were typically diffusely red, wet, firm, and failed to collapse. The major lesion recognized histologically was epithelial necrosis of alveoli and terminal bronchioles. Alveolar lumens contained large epithelioid cells, which were probably macrophages, and multinucleated syncytial cells were present in 16 of the 19 lungs. Inflammatory cells were sparse. Intraalveolar fibrin was prominent in all lungs. Bacteriological examination revealed no significant pathogen in 12 animals, but Rhodococcus equi was isolated from seven foals, associated in two animals with extensive abscesses. Viruses were not recovered from eight foals examined.

On the basis of the similarity and severity of lesions, the sporadic nature of the disease, and the similar age at onset which appears to coincide with declining maternally-derived immunoglobulins, we speculate that this disease may be the result of a viral infection.

  相似文献   

Obtaining Wisent early blastocyst in vitro is a basic for protection and creation of biodiversity for this threatened species          下载免费PDF全文

AM Duszewska  P Gręda  M Baraniewicz  W Bielecki  W Niżański  A Partyka  M Tracz  Z Nowak  A Chełmońska‐Soyta  W Olech 《Reproduction in domestic animals》2018,53(3):818-821

Wisent, or European bison (Bison bonasus), is listed as “vulnerable” on the IUCN Red List of Threatened Species and is therefore protected by international law. For the first time, a Wisent embryo has been obtained in vitro. This procedure creates a new opportunity to protect and increase Wisent reproductive potential and thereby opens new possibilities for the establishment of a controlled and broad reserve of the gene pool.  相似文献