全文获取类型
收费全文 | 758篇 |
免费 | 80篇 |
国内免费 | 2篇 |
专业分类
林业 | 25篇 |
农学 | 5篇 |
68篇 | |
综合类 | 69篇 |
农作物 | 28篇 |
水产渔业 | 40篇 |
畜牧兽医 | 542篇 |
园艺 | 8篇 |
植物保护 | 55篇 |
出版年
2023年 | 9篇 |
2022年 | 6篇 |
2021年 | 7篇 |
2020年 | 21篇 |
2019年 | 17篇 |
2018年 | 24篇 |
2017年 | 19篇 |
2016年 | 31篇 |
2015年 | 16篇 |
2014年 | 26篇 |
2013年 | 62篇 |
2012年 | 30篇 |
2011年 | 28篇 |
2010年 | 33篇 |
2009年 | 33篇 |
2008年 | 30篇 |
2007年 | 29篇 |
2006年 | 27篇 |
2005年 | 23篇 |
2004年 | 36篇 |
2003年 | 23篇 |
2002年 | 15篇 |
2001年 | 8篇 |
2000年 | 16篇 |
1999年 | 11篇 |
1998年 | 20篇 |
1997年 | 11篇 |
1996年 | 17篇 |
1995年 | 10篇 |
1994年 | 4篇 |
1993年 | 8篇 |
1992年 | 15篇 |
1991年 | 10篇 |
1990年 | 9篇 |
1989年 | 12篇 |
1988年 | 9篇 |
1987年 | 14篇 |
1986年 | 13篇 |
1985年 | 5篇 |
1984年 | 13篇 |
1983年 | 8篇 |
1982年 | 5篇 |
1976年 | 11篇 |
1974年 | 5篇 |
1973年 | 5篇 |
1972年 | 6篇 |
1971年 | 9篇 |
1970年 | 3篇 |
1969年 | 4篇 |
1966年 | 3篇 |
排序方式: 共有840条查询结果,搜索用时 15 毫秒
1.
2.
J. C. Scott-Moncrieff G. S. Elliott A. Radoveky W. E. Blevins 《The Journal of small animal practice》1989,30(12):696-699
A 14-year-old domestic shorthaired cat was presented because of swelling of the digits and lameness. A solitary lung mass was observed on thoracic radiographs. Clinical and pathological evaluation confirmed a primary pulmonary squamous cell carcinoma metastatic to a single digit on each foot. Other metastatic lesions were present in the left popliteal lymph node and in the left iliac vein. 相似文献
3.
4.
Bisset SA Vlassoff A McMurtry LW Elliott DC Cobb RM Kieran PJ Wood IB 《New Zealand veterinary journal》1992,40(3):97-100
The efficacy of an oral formulation of the newly developed parasiticide, moxidectin, was tested against benzimidazole-resistant Haemonchus contortus, Trichostrongylus colubriformis, and Nematodirus spathiger, levamisole-resistant Ostertagia circumcincta, and susceptible Cooperia curticei infections in weaned lambs. Thirty-two lambs were experimentally infected with mixed doses of the above strains of nematodes. They were allocated into four treatment groups by stratified randomisation using liveweights and faecal egg counts 28 days later. One group received moxidectin at 0.2 mg/kg liveweight, one group oxfendazole at 4.5 mg/kg liveweight, one group levamisole at 7.5 mg/kg liveweight and the last group remained untreated as the control. Worm burdens in the lambs at slaughter 10 days after oral treatment confirmed the resistance status of the nematode strains used, and showed that moxidectin had a greater than 99.9% efficacy (p<0.01) against all of them. No adverse effects due to treatment with moxidectin were observed in any of the animals. 相似文献
5.
Elliott R Jacobson Darryl Heard Arthur Andersen 《Journal of veterinary diagnostic investigation》2004,16(2):153-154
Tissues were evaluated from emerald tree boas, Corallus caninus, from a collection in which chlamydiosis was diagnosed. To determine the strain of chlamydia infecting these snakes, tissue samples from 5 frozen snakes were tested by a quantitative TaqMan polymerase chain reaction (PCR) test and a PCR sequence analysis test. Of the 22 samples tested, 9 were categorized as either positive or weakly positive with the TaqMan test, and 6 yielded an amplicon using a serial PCR test that amplified a portion of the 23S ribosomal RNA gene. A PCR product suitable for sequencing was obtained from the heart of one of the snakes. Sequence analysis showed that the snake had been infected with Chlamydophila pneumoniae. These findings show that C. pneumoniae can infect emerald tree boas, broadening the range of reptiles known to be infected by this primarily human pathogen. 相似文献
6.
Flow cytometric sorting technology was used to measure the difference in DNA content between X- and Y-chromosome-bearing spermatozoa in bucks. Spermatozoa were analysed by flow cytometry to characterize X- and Y-chromosome-bearing sperm populations and to quantify the DNA difference between them. Two symmetrical, overlapping and clearly separated peaks, corresponding to X- and Y-bearing spermatozoa, were detected. The difference in fluorescence intensity between the peaks was 4.4 +/- 0.03% without any significant inter- or intra-animal variations. Therefore, the identification and selection of high-purity samples of sperm populations for sex sorting is easier in bucks compared with other domestic species. 相似文献
7.
8.
DW Bartlett JM Clough JR Godwin AA Hall M Hamer B Parr‐Dobrzanski 《Pest management science》2004,60(3):309-309
The original article to which this Correction refers was published in Pest Management Science 58 (7): 649–662 (2002).Copyright © 2004 Society of Chemical Industry 相似文献
9.
Equine pituitary pars intermedia dysfunction: current understanding and recommendations from the Australian and New Zealand Equine Endocrine Group 下载免费PDF全文
CJ Secombe SR Bailey MA de Laat KJ Hughes AJ Stewart JM Sonis RHH Tan 《Australian veterinary journal》2018,96(7):233-242
The purpose of this article is to provide a review of the current knowledge and opinions about the epidemiology, clinical findings (including sequelae), diagnosis, treatment and monitoring of equine pituitary pars intermedia dysfunction, particularly in the Australian context. This information and the recommendations provided will assist practitioners in making informed decisions regarding the diagnosis and management of this disorder. 相似文献
10.
The purpose of this study was to investigate the effect of seminal plasma (SP) from bulls of known fertility on bovine endometrial epithelial cells (bEEC) in culture. The bEEC from passage 5, approximately 5.0–13 × 105 cells per flask, were challenged with SP from bulls of high or low fertility (n = 3 and 2, respectively) or PBS (control), at 1% (75 μl) or 4% (300 μl) and were incubated for 72 hr (n = 13 per challenge). Total cell number and viability of bEEC after challenge with 1% SP from either high‐ or low‐fertility bulls (75H or 75L, respectively) did not differ from controls. In contrast, challenge with 4% of SP from high‐ or low‐fertility bulls (300H or 300L) negatively affected bEEC cell number and viability. Challenge with 300 L had a greater adverse effect than 300H. These results suggest that the negative effect of bovine SP on bEEC is both dose‐dependent and fertility‐dependent. 相似文献