全文获取类型
| 收费全文 | 58篇 |
| 免费 | 5篇 |
专业分类
| 3篇 | |
| 综合类 | 18篇 |
| 水产渔业 | 2篇 |
| 畜牧兽医 | 30篇 |
| 园艺 | 10篇 |
出版年
| 2023年 | 1篇 |
| 2022年 | 1篇 |
| 2021年 | 1篇 |
| 2020年 | 1篇 |
| 2019年 | 1篇 |
| 2016年 | 2篇 |
| 2015年 | 2篇 |
| 2012年 | 2篇 |
| 2011年 | 3篇 |
| 2010年 | 1篇 |
| 2008年 | 3篇 |
| 2007年 | 4篇 |
| 2006年 | 1篇 |
| 2005年 | 2篇 |
| 2004年 | 1篇 |
| 2003年 | 1篇 |
| 2002年 | 1篇 |
| 1999年 | 2篇 |
| 1998年 | 1篇 |
| 1995年 | 6篇 |
| 1994年 | 1篇 |
| 1993年 | 2篇 |
| 1990年 | 2篇 |
| 1989年 | 2篇 |
| 1987年 | 1篇 |
| 1983年 | 3篇 |
| 1982年 | 2篇 |
| 1980年 | 1篇 |
| 1979年 | 2篇 |
| 1978年 | 1篇 |
| 1977年 | 1篇 |
| 1972年 | 3篇 |
| 1959年 | 2篇 |
| 1958年 | 1篇 |
| 1946年 | 1篇 |
| 1945年 | 1篇 |
排序方式： 共有63条查询结果，搜索用时 31 毫秒
41.
42.
D. A. Pass ‡ A. J. Forman I. D. Connaughton J. C. Gillick † R. S. Cutler † 《Australian veterinary journal》1979,55(10):495-497
Porcine enteroviruses were isolated from weaner pigs that had nervous signs and mild non-suppurative meningoencephalomyelitis and ganglioneuritis. The clinical signs and lesions were not typical of enterovirus infection and it is believed that an organic arsenical present in feed enhanced pathogenicity of enteroviruses. Severe non-suppurative polioencephalomyelitis and ganglioneuritis were produced in gnotobiotic pigs by oral inoculation of the viruses. 相似文献
43.
Thompson R Bandera E Burley V Cade J Forman D Freudenheim J Greenwood D Jacobs D Kalliecharan R Kushi L McCullough M Miles L Moore D Moreton J Rastogi T Wiseman M 《Public health nutrition》2008,11(10):1006-1014
OBJECTIVE: Despite the increasing dependence on systematic reviews to summarise the literature and to issue public health recommendations, the formal assessment of the reliability of conclusions emerging from systematic reviews has received little attention. The main goal of the present study was to evaluate whether two independent centres, in two continents, draw similar conclusions regarding the association of food, nutrition and physical activity and endometrial cancer, when provided with the same general instructions and with similar resources. DESIGN: The assessment of reproducibility concentrated on four main areas: (1) paper search and selection; (2) assignment of study design; (3) inclusion of papers; and (4) individual studies selected for meta-analysis and the summary risk estimate obtained. RESULTS: In total 310 relevant papers were identified, 166 (54 %) were included by both centres. Of the remaining 144 papers, 72 (50 %) were retrieved in the searches of one centre and not the other (54 in centre A, 18 in centre B) and 72 were retrieved in both searches but regarded as relevant by only one of the centres (52 in centre A, 20 in centre B). Of papers included by both centres, 80 % were allocated the same study design. Agreement for inclusion of cohort-type and casekey' papers was 87 %. Summary risk estimates from meta-analyses were similar. CONCLUSIONS: Transparency of process and explicit detailed procedures are necessary parts of a systematic review and crucial for the reader to interpret its findings. 相似文献
44.
45.
A 10-year-old male castrated domestic shorthair cat was evaluated for coughing and lethargy. Thoracic radiographs revealed a soft tissue lung mass and diffuse peribronchial infiltrates. Bronchoscopy was performed and Capnocytophaga cynodegmi was cultured from bilateral bronchoalveolar lavage samples. Clinical signs and bacterial colonization resolved following treatment with enrofloxacin. A lung lobectomy was performed to remove the lung mass, which was diagnosed as pulmonary carcinoma. C cynodegmi is most frequently isolated from localized wound and corneal infections in humans. Specialized growth characteristics of C cynodegmi may result in low sensitivity for bacterial culture. To the authors' knowledge, this case represents the first report of C cynodegmi infection in a veterinary patient and only the second case in human or veterinary medicine where the organism has been isolated from a bronchoalveolar lavage sample. Based on this report, Capnocytophaga species should be considered as potential opportunistic pathogens. 相似文献
46.
47.
48.
Organisms may be constrained by the energetic costs incurred while obtaining resources in fragmented landscapes. We used a spatially neutral model of deer wintering habitat to evaluate the effects of landscape fragmentation on the aggregation of deer habitat. The spatially neutral model used Bayesian probabilities to predict where deer wintering areas occurred. The probabilities were conditional on 12 landscape variables measured at 22,750 contiguous 0.4 ha locations. The model predicted deer habitat at each location independently, thereby enabling a comparison of habitat aggregation in observed, simulated, and random distributions of deer habitat. The predictions of the neutral model exhibited greater fragmentation than observed in nature, suggesting that suitable, yet isolated, locations were not visited by deer. The most suitable sites for deer were clumped in the neutral model, regardless of scale. The inclusion of less suitable sites preserved significant aggregation at fine scales but not at broad scales. Species operate at different scales within a landscape, so ecologists, nature reserve designers and natural resource planners may benefit from models that focus on the proximity of habitat sites as a function of both spatial scale and habitat quality. 相似文献
49.
50.