排序方式： 共有43条查询结果，搜索用时 31 毫秒
21.
AIM: To examine the relationships between workplace bullying, destructive leadership and team conflict, and physical health, strain, self-reported performance and intentions to quit among veterinarians in New Zealand, and how these relationships could be moderated by psychological capital and perceived organisational support.
METHODS: Data were collected by means of an online survey, distributed to members of the New Zealand Veterinary Association. Participation was voluntary and all responses were anonymous and confidential. Scores for the variables measured were based on responses to questions or statements with responses categorised on a linear scale. A series of regression analyses were used to assess mediation or moderation by intermediate variables on the relationships between predictor variables and dependent variables.
RESULTS: Completed surveys were provided by 197 veterinarians, of which 32 (16.2%) had been bullied at work, i.e. they had experienced two or more negative acts at least weekly over the previous 6 months, and nine (4.6%) had experienced cyber-bullying. Mean scores for workplace bullying were higher for female than male respondents, and for non-managers than managers (p<0.01). Scores for workplace bullying were positively associated with scores for destructive leadership and team conflict, physical health, strain, and intentions to quit (p<0.001). Workplace bullying and team conflict mediated the relationship between destructive leadership and strain, physical health and intentions to quit. Perceived organisational support moderated the effects of workplace bullying on strain and self-reported job performance (p<0.05).
CONCLUSIONS: Relatively high rates of negative behaviour were reported by veterinarians in this study, with 16% of participants meeting an established criterion for having been bullied. The negative effects of destructive leadership on strain, physical health and intentions to quit were mediated by team conflict and workplace bullying. It should be noted that the findings of this study were based on a survey of self-selected participants and the findings may not represent the wider population of New Zealand veterinarians. 相似文献
22.
23.
Thanks go to our hosts,the organizers,sponsors,and all participants who have put in great ef-forts to making the 2008 Research Conference of the International Cotton Genome Initiative (ICGI,http.//icgi,tamu.edu/meeting/2008/) possible.Special thanks go to our host here in Anyang,and toour host country,China-the world's largest cotton producer and consumer.The biennial ICGI Re-search Conference is a major venue for the global cotton community to exchange information and toformulate,prioritize,and coordinate future collaborative research efforts in cotton genomics. 相似文献
24.
SA Bowring DH Erwin Jin M W Martin YG K Davidek W Wang 《Science (New York, N.Y.)》1998,280(5366):1039-1045
The mass extinction at the end of the Permian was the most profound in the history of life. Fundamental to understanding its cause is determining the tempo and duration of the extinction. Uranium/lead zircon data from Late Permian and Early Triassic rocks from south China place the Permian-Triassic boundary at 251.4 +/- 0.3 million years ago. Biostratigraphic controls from strata intercalated with ash beds below the boundary indicate that the Changhsingian pulse of the end-Permian extinction, corresponding to the disappearance of about 85 percent of marine species, lasted less than 1 million years. At Meishan, a negative excursion in delta13C at the boundary had a duration of 165,000 years or less, suggesting a catastrophic addition of light carbon. 相似文献
25.
Serial Transrectal Ultrasonography for Monitoring the Reproductive Activity of the Asiatic Black Bear (Ursus thibetanus ussuricus) 
下载免费PDF全文
下载免费PDF全文 HG Kang DH Jeong JJ Yang BK Lee JY Kong JW Lee IH Kim 《Reproduction in domestic animals》2015,50(1):149-158
This study evaluated the structural changes in the reproductive tract of Asiatic black bears using serial transrectal ultrasonography. In addition, the ultrasonographic observations were compared with the results of vaginal cytology and hormonal analyses. The collection of blood for hormonal analysis, vaginal cytology and transrectal ultrasonography was performed in two bears (Bears 1 and 2) from June 2011 to August 2013 without mating and in a third bear (Bear 3) from April to December 2012, allowing natural mating. Serial ultrasonographic observations showed cyclic changes in ovarian structures (e.g. emergence of small follicles, growth and ovulation of dominant follicles and corpus luteum (CL) formation) during the reproductive cycles of the three bears. The diameter of the uterine horns remained similar throughout the reproductive cycle in Bears 1 and 2, and it remained similar from April until October, but an enlargement containing foetuses was observed in Bear 3 in December. The ultrasonographic observations were consistent with the data obtained through vaginal cytology and progesterone analysis during the reproductive cycle. An average of 4.0 (±0.4) dominant follicles was observed during the oestrous stage (May‐August), during which the superficial cells accounted for >90% of the total vaginal cells. In addition, the detection of an average of 2.6 (±0.2) CL was associated with increased plasma progesterone concentrations (3.0 ± 0.4 ng/ml) between June and December (near hibernation). In conclusion, serial transrectal ultrasonography demonstrated yearly oestrous (ovulation) cycles via follicular dynamics and CL formation on ovaries, accordingly with vaginal cytology and hormonal level in the Asiatic black bear. 相似文献
26.
27.
YU Jing KOHEL Russell HINZE Lori FRELICHOWSKI James XU Zhan-you YU John Z PERCY Richard 《棉花学报》2008,(Z1)
CottonDB (www.cottondb,org) was initiated in 1995.It is a database that contains genomic,genetic,and taxonomic information for cotton (Gossypium spp.).It serves both as an archival database and as a dynamic database,which incorporates new data and user resources.CottonDB is maintained at the Southern Plains Agricultural Research Center in College Station,TX.The project includes a website and database creating a repository of information for over 450,000 gene,EST,and conting sequences; genetic and physical map data; nearly 10,000 DNA primers; and 9,000 germplasm accessions. 相似文献
28.
DJ HARRIS CD HIBBURT† GA ANDERSON‡ PJ YOUNIS† DH FITSPATRICK§ AC DUNN¶ IW PARSONS NR McBEATH 《Australian veterinary journal》1988,65(6):171-176
A survey of 73 dairy farms in south-western Victoria was conducted to assess the cost and mean herd incidence of foot lameness for the period from calving to the end of November, 1985, and to identify the herd, management and environmental factors associated with foot lameness. The mean herd size was 125 cows (range 82 to 220). Lameness occurred in 64 (88%) herds, and the mean herd incidence was 7.0% (range 0.0 to 30.9%). The main clinical signs associated with lameness were the presence of overworn and/or bruised soles, or stones lodged in the interdigital cleft. Factors associated with lameness were: property and herd size, age of cow, bail feeding, voluntary entry into the bails, and features of the farm track including its length, the presence of steep slopes, the type of surface material, presence and treatment of broken sections and maintenance including rolling history. The association of these factors with specific clinical signs was examined. The mean cost was estimated to be $42.90 per lame cow due to loss of production, treatment, the culling or death of lame cows, and extra man hours spent managing lame cows. It was concluded that the site, construction, maintenance and use of the farm track were of major importance to the incidence of lameness in herds in this area and recommendations for reducing lameness are made. 相似文献
29.
G. I. ANDERSON BVSC MACVSC D. B. MCKEOWN DVM G. D. PARTLOW PhD D. H. PERCY DVM MSC PhD 《Veterinary surgery : VS》1987,16(2):119-125
Thirteen healthy mixed breed dogs (6 female and 7 male) underwent rectal transection and resection of 0 to 6 cm using a dorsal approach. Rectoanal sphincter pressure studies were performed preoperatively and 6 weeks after surgery using a double balloon manometer device. Sphincter pressure profiles were altered in the 6 cm resection dogs. Clinical observations of defecation and degree of continence were made over a 10 week period postoperatively. The transection only and 4 cm resection dogs defecated normally. All dogs in the 6 cm resection group involving the peritoneal reflection were incontinent but retained some normal posturing behavior. Surgical complications included minor infection in two dogs, rectocutaneous fecal leakage in four dogs, breakdown of the anastomotic site in four dogs, and incontinence in all of the dogs that underwent 6 cm resections. Barium enemas were performed on the rectums postmortem to ascertain the degree of stricturing induced by the surgery. The index of stenosis measured did not correlate well with the extent of straining in each group. Histopathologic findings on dogs in the transection only and 4 cm resection groups without dehiscence showed mild granulomatous proctitis with normal myenteric plexi seen. Dogs suffering dehiscence had suppurative proctitis, necrosis, and obliteration of the myenteric plexi. 相似文献
30.
The distribution and morphology of fibrous astrocytes in the cervical spinal cord of normal horses and horses with chronic compressive myelopathy were demonstrated using immunohistochemical staining for glial fibrillary acidic protein. In the spinal cord from normal horses, astrocytes with stellate cell bodies and short processes were irregularly distributed in grey matter. In the white matter, their cell bodies were small and angular in areas adjacent to grey matter and larger and more stellate-shaped in the subpial area. Astrocyte processes were fine, and evenly distributed in a predominantly radial pattern in transverse sections of cord. Gliosis was marked in the spinal cords of horses with cervical compressive myelopathy. In the grey matter at the level of compression astrocytes were often enlarged and rounded, with short, blunt processes, but the gliosis was generally mild. In the white matter, gliosis was obvious in areas of nerve fibre swelling and degeneration at the level of compression and in areas of ascending and descending Wallerian degeneration. The fine radial pattern of astrocyte fibres was replaced by a dense, irregular arrangement. Gliosis persisted in the cords of chronically affected horses after active nerve fibre degeneration had subsided. The areas of gliosis coincided with the areas of Marchi staining for degenerating myelin and with areas of myelin loss in osmium tetroxide post-fixed tissue. Histological observations were consistent with astrocytes replacing areas of extracellular space that remained after nerve fibre degeneration. it is concluded that astrocytic gliosis is a prominent and persistent alteration of the spinal cord of horses with chronic cervical compressive myelopathy. 相似文献