全文获取类型
收费全文 | 71篇 |
免费 | 14篇 |
专业分类
林业 | 1篇 |
基础科学 | 1篇 |
2篇 | |
综合类 | 8篇 |
农作物 | 1篇 |
水产渔业 | 1篇 |
畜牧兽医 | 67篇 |
植物保护 | 4篇 |
出版年
2023年 | 1篇 |
2020年 | 6篇 |
2019年 | 2篇 |
2018年 | 4篇 |
2017年 | 2篇 |
2016年 | 3篇 |
2015年 | 9篇 |
2014年 | 5篇 |
2013年 | 7篇 |
2011年 | 3篇 |
2010年 | 5篇 |
2009年 | 3篇 |
2006年 | 3篇 |
2005年 | 4篇 |
2004年 | 3篇 |
2002年 | 2篇 |
2001年 | 1篇 |
1999年 | 1篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1993年 | 4篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1979年 | 1篇 |
1972年 | 2篇 |
排序方式: 共有85条查询结果,搜索用时 15 毫秒
21.
22.
23.
芽孢杆菌HSY-8-1对植物病原真菌的抑制及其抑菌产物特性 总被引:3,自引:1,他引:3
为挖掘用于生物防治的微生物资源,自海南蚕豆枯萎病区土壤分离1株芽孢杆菌HSY-8-1,经抗菌试验分析表明,其代谢产生的拮抗物质对引发植物立枯病和根腐病的立枯丝核菌(Rhizoctonia solani)和镰刀菌(Fusariumspp.)抑菌作用较强,具有使病菌菌丝扭曲、缢缩等致畸效应,并抑制立枯丝核菌的菌核形成。研究表明,在NB液体培养基中发酵时,进入稳定生长期后开始产生抑菌物质,72 h时累积达到最大值。这种抑菌物质的特性为外泌型、水溶性,可透过0.22μm的微孔滤膜,对热、酸、碱、蛋白酶水解、紫外线照射等影响有较强的稳定性。 相似文献
24.
25.
D. Murgia M. Pivetta K. Bowlt C. Volmer A. Holloway R. Dennis 《The Journal of small animal practice》2014,55(8):431-435
This case report describes three brachycephalic dogs with intranasal epidermoid cysts that were causing additional upper airway obstruction. Although epidermoid cysts have been described in several locations in dogs, to the authors’ knowledge intranasal epidermoid cysts have not been previously reported. All dogs had mucopurulent to haemorrhagic nasal discharge. Magnetic resonance imaging of the head revealed the presence of unilateral or bilateral intranasal cystic lesions obstructing the nasal cavities partially or completely, with atrophy of the ipsilateral nasal turbinates. The cystic lesions were surgically excised in all dogs using a modified lateral alveolar mucosal approach to the affected nasal cavity. Aerobic, anaerobic and fungal culture of the cystic contents were negative and histology of the excised tissue was consistent with a benign intranasal epidermoid cyst in each dog. Upper airway obstruction was clinically improved in two dogs. 相似文献
26.
Climate Change During the Last Deglaciation in Antarctica 总被引:1,自引:0,他引:1
PA Mayewski MS Twickler SI Whitlow LD Meeker Q Yang J Thomas K Kreutz PM Grootes DL Morse EJ Steig ED Waddington ES Saltzman P Whung KC Taylor 《Science (New York, N.Y.)》1996,272(5268):1636-1638
Greenland ice core records provide clear evidence of rapid changes in climate in a variety of climate indicators. In this work, rapid climate change events in the Northern and Southern hemispheres are compared on the basis of an examination of changes in atmospheric circulation developed from two ice cores. High-resolution glaciochemical series, covering the period 10,000 to 16,000 years ago, from a central Greenland ice core and a new site in east Antarctica display similar variability. These findings suggest that rapid climate change events occur more frequently in Antarctica than previously demonstrated. 相似文献
27.
28.
29.
30.
A rare case of mycosis (ringworm) in a female roedeer is described and compared with parakeratosis of hair. It seems that in game, parakeratosis--as a primary lesion--predisposes to mycosis. 相似文献