全文获取类型
收费全文 | 73篇 |
免费 | 7篇 |
专业分类
林业 | 4篇 |
农学 | 3篇 |
7篇 | |
综合类 | 15篇 |
农作物 | 9篇 |
水产渔业 | 3篇 |
畜牧兽医 | 37篇 |
植物保护 | 2篇 |
出版年
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 3篇 |
2018年 | 3篇 |
2017年 | 2篇 |
2016年 | 3篇 |
2015年 | 3篇 |
2014年 | 2篇 |
2013年 | 4篇 |
2012年 | 4篇 |
2011年 | 5篇 |
2010年 | 2篇 |
2009年 | 3篇 |
2008年 | 5篇 |
2007年 | 3篇 |
2006年 | 4篇 |
2005年 | 7篇 |
2004年 | 1篇 |
2003年 | 1篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 3篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 2篇 |
1984年 | 1篇 |
1981年 | 1篇 |
1968年 | 1篇 |
1966年 | 1篇 |
1955年 | 1篇 |
1953年 | 1篇 |
1941年 | 2篇 |
排序方式: 共有80条查询结果,搜索用时 15 毫秒
1.
2.
3.
Heechul Kim Taeki Lee Jeeyoung Lee Meejung Ahn Changjong Moon Myung Bok Wie Taekyun Shin 《Journal of veterinary science (Suw?n-si, Korea)》2006,7(2):101-104
The expression of caveolin-1 and -2 in the retina was examined; Western blot analysis showed that both were present. Immunohistochemistry indicated that caveolin-1 was expressed in the majority of retinal layers, including the ganglion cell layer, inner plexiform layer, outer plexiform layer, and in the vascular endothelial cells of the retina. Caveolin-2 was primarily immunostained in the vessels, but in a few other elements as well. This is the first demonstration of caveolin differential expression in the retina of rats, and suggests that caveolin plays an important role in signal transduction in glial cells and neuronal cells. 相似文献
4.
Bok DC 《Science (New York, N.Y.)》1981,213(4511):980-982
In reassessing the role of government, many Americans have agreed that public expenditures should be curtailed. Although our universities must bear their full share of the sacrifices, some of the Administration's recent proposals would be to the detriment of the country. Drastic cuts in student aid, for example, will not encourage young people to seek the best possible education and training; reductions in federal funds for scientific instruments and facilities will mean that our laboratories will deteriorate, our accomplishments will be fewer. The success of American science has depended heavily on the talent that came from Europe at the time of World War II. Today that source has largely disappeared, and if we cannot replace it with exceptional young investigators of our own, the quality of our universities and the vitality of our science will diminish. 相似文献
5.
Visual pigment renewal in the mature frog retina 总被引:6,自引:0,他引:6
It has been demonstrated by autoradiography that radioactive amino acids serve as precursors for proteins which are subsequently incorporated into retinal rod outer segment discs in mature animals. By the isolation and purification of visual pigment from retinas of adult frogs after injection of tritiated leucine and phenylalanine, it has been shown that at least part of this labeled protein consists of visual pigment (rhodopsin). 相似文献
6.
Yi NY Park SA Jeong MB Kim MS Lim JH Nam TC Seo K 《Journal of the American Animal Hospital Association》2006,42(6):435-439
The medical records of 23 dogs that underwent medial canthoplasty for treatment of epiphora were reviewed. The most prevalent breed encountered was the shih tzu. Other affected breeds included the Pekingese, Maltese, toy poodle, and pug. All dogs had epiphora associated with medial canthal trichiasis and/or entropion. Other ocular abnormalities included conjunctivitis, keratitis, pigmentary keratitis, corneal ulceration, globe prolapse, and nasal fold trichiasis. After medial canthoplasty, the epiphora resolved in all dogs. 相似文献
7.
Hyun Cheol Soh Ae Ran Park Sangkyu Park Kyoungwhan Back Jae Bok Yoon Hyo Guen Park Young Soon Kim 《European journal of plant pathology / European Foundation for Plant Pathology》2012,132(1):37-48
To elucidate the functional roles of PR10 genes from two pepper species during plant-pathogen interactions, PR10 genes were isolated from fungal-resistant (Capsicum baccatum var. PBC80) and fungal-susceptible (C. annuum var. Yeoju) pepper fruits infected with anthracnose fungus (Colletotrichum acutatum). Despite strong nucleotide sequence identity, there were significant differences in the patterns of gene expression and
protein accumulation between the genes from the two host species. Induced expression of the PR10 mRNA in PBC80 (bacPR10) was highly maintained from 24 h after infection (HAI) rather than that in Yeoju (annPR10). These mRNA expression patterns were correlated with the level of respective protein that was detected as two or three
bands in each species. Substantial induction of bacPR10 proteins was confirmed by 2D-gel analysis followed by immunoblotting. Immunolocalization study showed that deposition
of bacPR10 was exclusively observed in the pericarp of PBC80 fruits after fungal infection, suggesting functional significance
in defence. Additionally, in vitro analysis of the enzymatic properties of PR10 proteins revealed that recombinant bacPR10 had higher ribonucleolytic activity
and exhibited less sensitivity to proteinase treatment than did annPR10. Taken together, these results support the idea that
relative abundance and prolonged longevity of bacPR10 in PBC80 fruits may contribute to their increased resistance in response
to the anthracnose fungus, as compared with Yeoju fruit. 相似文献
8.
The embryonic development of artificially spawned southern mullet, Liza richardsonii, eggs and the development of the larvae to 46 days are described and illustrated using drawings and photographs. The floating eggs hatched in sea water at 18–24°C after 46–60 h. Newly stripped eggs usually had more than one oil droplet (up to 16) which merged during development. Free embryos averaged 2,36 mm at hatching and had distinct yellow pigment. 相似文献
9.
This field study investigated whether the administration of a single dose of gonadotropin‐releasing hormone (GnRH) to dairy cows without a corpus luteum (CL) 4 weeks after calving can improve reproductive performance. Holstein dairy cows underwent ultrasonography to assess the presence of ovarian structures at 29.2 ± 5.2 days post‐partum, and cows were divided into two main groups based on the presence (CL group, n = 230) or absence (non‐CL group, n = 460) of a CL. The non‐CL group was further randomly divided into two subgroups based on the administration of GnRH (non‐CL GnRH group, n = 230) or no GnRH (non‐CL control group, n = 230). Subsets of cows from non‐CL control (n = 166) and non‐CL GnRH (n = 175) groups received a second ultrasonography at 44.5 ± 5.4 days post‐partum to assess CL formation. The percentage of cows with CL at the second ultrasonography was greater in the non‐CL GnRH group (70.9%) than in the non‐CL control group (53.0%, p = 0.0006). The hazard of the first post‐partum insemination by 150 days in milk (DIM) was higher in the CL group than in the non‐CL control group (hazard ratio [HR]: 1.36, p = 0.001). The probability of a pregnancy to the first insemination was higher in non‐CL GnRH (odds ratio [OR]: 1.50, p = 0.04) and CL groups (OR: 1.55, p = 0.03) compared to the non‐CL control group. Furthermore, the hazard of pregnancy by 210 DIM was higher in non‐CL GnRH (HR: 1.30, p = 0.01) and CL (HR: 1.51, p = 0.0001) groups than in the non‐CL control group. In conclusion, administration of GnRH to dairy cows without a CL 4 weeks after calving was associated with an increase in ovulation and improved reproductive performance. 相似文献