Interactions Among Different Devices and Electrical Stimulus on the Electroejaculation of Captive Agoutis (Dasyprocta leporina)          下载免费PDF全文

TS Castelo  ALP Souza  GL Lima  GCX Peixoto  LB Campos  MF Oliveira  AR Silva 《Reproduction in domestic animals》2015,50(3):492-496

The interactions among different electroejaculation devices associated with serial or continuous stimuli were investigated to improve the efficiency of the electroejaculation for semen collection in agoutis. Ten sexually matured male Dasyprocta leporina were restrained by the intramuscular administration of xylazine–ketamine association. Each individual was randomly subjected to four electroejaculation protocols, by combining two devices (one presenting longitudinal electrodes emitting square waves and other presenting ring electrodes emitting sine waves) and two electrical stimuli protocols (serial or continuous). A total of 40 attempts for electroejaculation were conducted in agoutis, being 10 per treatment. The most efficient treatment in providing ejaculates containing sperm (p < 0.05) was that using and electroejaculator connected to a probe with ring electrodes and associated with serial stimuli (4/7; 57%). In spite of semen parameters obtained by sine waves were adequate for using the samples for assisted reproduction, higher values for sperm motility and functional membrane integrity were obtained in the use of the square wave, independently of the electric stimulation protocol used (p < 0.05). In conclusion, we verified that the use of a device presenting a probe with ring electrodes and emitting sine waves, associated with a serial stimuli protocol, improves the efficiency for semen obtaining by electroejaculation in adults D. leporina.  相似文献   

Efficacy of COX‐2 inhibitors in controlling inflammation and capsular opacification after phacoemulsification cataract removal          下载免费PDF全文

Heather L. Brookshire  Robert V. English  Bradley Nadelstein  Anne K. Weigt  Barrett W. Gift  Brian C. Gilger 《Veterinary ophthalmology》2015,18(3):175-185

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Low-density lipoprotein antioxidant activity of phenolic compounds and polyphenol oxidase activity in selected clingstone peach cultivars   总被引：2，自引：0，他引：2  

Chang S  Tan C  Frankel EN  Barrett DM 《Journal of agricultural and food chemistry》2000,48(2):147-151

The antioxidant potential of eight clingstone peach cultivars was investigated by determining phenolic compounds and inhibition of low-density lipoprotein (LDL) oxidation. Cultivars low in polyphenol oxidase (PPO) were also selected to minimize enzymatic browning. Inhibition of LDL oxidation varied from 17.0 to 37.1% in peach flesh extract, from 15.2 to 49.8% in whole peach extract, and from 18.2 to 48.1% in peel extract. Total phenols were 432.8-768.1 mg/kg in flesh extract, 483.3-803.0 mg/kg in whole extract, and 910.9-1922.9 mg/kg in peel extract. The correlation coefficient between relative LDL antioxidant activity and concentration of total phenols was 0.76. Peel PPO activity was higher than flesh activity in most cultivars. The lowest PPO and specific activities were found in the Walgant cultivar, followed by Kakamas and 18-8-23. These three cultivars combine the desirable characteristics of strong antioxidant activity, low PPO activity, and lower susceptibility to browning reactions.  相似文献   

Effects of landscape spatial structure on movement patterns of the hispid cotton rat (Sigmodon hispidus)     

David R. Bowne  John D. Peles  Gary W. Barrett 《Landscape Ecology》1999,14(1):53-65

A large-scale experimental landscape study was conducted to examine the use of corridors and the forest matrix habitat by the hispid cotton rat (Sigmodon hispidus). The role of micro- habitat selection by S. hispidus in influencing routes of movement was also investigated. The experimental landscape consisted of ten 1.64-ha patches (each 128×128 m) established in a loblolly (Pinus teada) forest. Four of the patches were isolated while the other six were connected in pairs by a 32-m wide corridor. Cotton rats (N=96) were simultaneously released into both an isolated and connected patch, and monitored by radiotelemetry for 10 days. We found that the forest matrix was not a barrier to movements of cotton rats. Fifty percent of the cotton rats moved through the matrix. Corridors had no significant effect on the number of animals leaving connected patches (60%) compared to isolated patches (50%). However, corridors were the preferred route to leave a connected patch. Colonization success for cotton rats leaving connected and isolated patches did not significantly differ. Cotton rats exhibited micro-habitat preferences and these preferences differed within patch/corridor and matrix habitats. In patch/corridor habitats, cotton rats selected sites with tall (>1 m) shrubs and high percent cover. In the forest matrix, cotton rats selected sites with abundant cover by vines and low tree canopy cover. Movement patterns of Sigmodon hispidus are not strongly influenced by large-scale landscape spatial structures. Micro-habitat selection, however, does influence movement patterns. These findings have important implications regarding habitat connectivity for small mammals.  相似文献   

Effects of castration on fighting, roaming, and urine spraying in adult male cats   总被引：2，自引：0，他引：2  

B L Hart  R E Barrett 《Journal of the American Veterinary Medical Association》1973,163(3):290-292

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Crop production functions and the allocation and use of irrigation water     

J.W.Hugh Barrett  Gaylord V. Skogerboe 《Agricultural Water Management》1980,3(1):53-64

The economically optimal depth of irrigation water to apply depends on the relationship between crop yield and water use. Past research efforts to formulate and to explain the factors influencing irrigated crop production functions have therefore been briefly reviewed. Although it is not possible to obtain a unique relationship, by considering a possible range of functions, and by understanding the factors causing variations in the form of these functions, valuable conclusions can be drawn relating to the optimal depth of water application and the relative magnitude of benefits derived from efficient water management.  相似文献   

Clinical and pathological responses of water buffalo (Bubalus bubalis) to experimental infection with bovine ephemeral fever virus—Chinese strain     

BAI WENBIN  ZHANG ZIGANG  JIANG CHUNLING  MF. UREN  SS. DAVIS 《Australian veterinary journal》1989,66(11):373-374

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Show pity for the audience     

R B Barrett 《Journal of the American Veterinary Medical Association》1969,154(9):1075-1077

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Radiography in Trauma of the Musculocutaneous Soft Tissues of Dogs and Cats     

Robert B.  Barrett  D.V.M. 《Veterinary radiology & ultrasound》1971,12(1):5-16

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Plant population biology: genetic differentiation and dispersal in plants     

Barrett SC 《Science (New York, N.Y.)》1986,232(4755):1279

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