全文获取类型
收费全文 | 204篇 |
免费 | 19篇 |
出版年
2022年 | 3篇 |
2021年 | 11篇 |
2020年 | 2篇 |
2019年 | 3篇 |
2018年 | 4篇 |
2017年 | 4篇 |
2016年 | 5篇 |
2015年 | 7篇 |
2014年 | 9篇 |
2013年 | 26篇 |
2012年 | 5篇 |
2011年 | 10篇 |
2010年 | 2篇 |
2009年 | 6篇 |
2008年 | 10篇 |
2007年 | 9篇 |
2006年 | 12篇 |
2005年 | 5篇 |
2004年 | 9篇 |
2003年 | 7篇 |
2002年 | 4篇 |
1999年 | 3篇 |
1998年 | 3篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1992年 | 4篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1983年 | 4篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 4篇 |
1978年 | 1篇 |
1977年 | 3篇 |
1976年 | 3篇 |
1974年 | 1篇 |
1973年 | 5篇 |
1972年 | 4篇 |
1971年 | 2篇 |
1969年 | 3篇 |
1968年 | 2篇 |
1966年 | 2篇 |
1965年 | 1篇 |
1964年 | 5篇 |
1963年 | 1篇 |
排序方式: 共有223条查询结果,搜索用时 15 毫秒
1.
2.
Immobilisation of limbs in kittens, in which the neuromuscular apparatus is in active growing phase, affects the maturation of the end-plates, which appear smaller and pointed. Longer periods of immobilisation lead to a significant reduction in the surface area of the neuromuscular junctions which were seen to be "V" or "W" shaped. 相似文献
3.
Malathi Chari K. Gupta T. G. Prasad K. S. Krishna Sastry M. Udaya Kumar 《Plant and Soil》1986,91(1):109-114
Summary The effect of calcium in the water relations and tolerance to moisture deficits was tested in groundnut and cowpea. In both species, enrichment of tissue with calcium resulted in maintenance of a higher water status under stress associated with low proline accumulation. The extent of membrane damage (as reflected by the absorbance at 273 nm) was lesser in leaves of plants fed with higher levels of Ca++ when subjected to simulated stress. The rate of water loss from the leaves of Ca++-enriched plants was also lower. The possible role of Ca++ in inducing membrane stability and maintenance of higher water status is discussed. 相似文献
4.
Rabbit kidney brush-border membrane vesicles were exposed to bacterial protease which cleaves off a large number of externally oriented proteins. Na+-dependent d-glucose transport is left intact in the protease-treated vesicles. The protease-treated membrane was solubilized with deoxycholate and the deoxycholate-extracted proteins were further resolved by passage through Con A-Sepharose columns. Sodium-dependent d-glucose activity was found to reside in a fraction containing a single protein band of Mr ? 165000 which is apparently a dimer of Mr ? 85 000. When reconstituted and tested for transport, this protein showed Na+-dependent, stereo-specific and phlorizin-inhibitable glucose transport. Transport activity is completely recovered and is 20-fold increased in specific activity. A similar isolate was obtained from rabbit small intestinal brush-border membranes and kidneys from several other species of animals. 相似文献
5.
6.
7.
Vibha Gupta G. LakshmiSita M. S. Shaila V. Jagannathan Malathi S. Lakshmikumaran 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1992,84(3-4):397-402
Summary The construction and characterization of two genome-specific recombinant DNA clones from B. nigra are described. Southern analysis showed that the two clones belong to a dispersed repeat family. They differ from each other in their length, distribution and sequence, though the average GC content is nearly the same (45%). These B genome-specific repeats have been used to analyse the phylogenetic relationships between cultivated and wild species of the family Brassicaceae. 相似文献
8.
9.
Vijayakumar Maheshwari Malathi Sushil K. Jalali Dandinashivara K. Sidde Gowda Muthugounder Mohan Thiruvengadam Venkatesan 《Insect Science》2017,24(1):35-46
The brown planthopper (BPH), Nilaparvata lugens (Stål), is one of the major pests of rice throughout Asia. Extensive use of insecticides for suppressing N. lugens has resulted in the development of insecticide resistance leading to frequent control failures in the field. The aim of the present study was to evaluate resistance in the field populations of N. lugens from major rice growing states of South India to various insecticides. We also determined the activity of detoxifying enzymes (esterases [ESTs], glutathione S‐transferases [GSTs], and mixed‐function oxidases [MFOs]). Moderate levels of resistance were detected in the field populations to acephate, thiamethoxam and buprofezin (resistance factors 1.05–20.92 fold, 4.52–14.99 fold, and 1.00–18.09 fold, respectively) as compared with susceptible strain while there were low levels of resistance to imidacloprid (resistance factor 1.23–6.70 fold) and complete sensitivity to etofenoprox (resistance factor 1.05–1.66 fold). EST activities in the field populations were 1.06 to 3.09 times higher than the susceptible strain while for GST and MFO the ratios varied from 1.29 to 3.41 and 1.03 to 1.76, respectively. The EST activity was found to be correlated to acephate resistance (r = 0.999, P ≥ 0.001). The high selection pressure of organophosphate, neonicotinoid, and insect growth regulator (IGR) in the field is likely to be contributing for resistance in BPH to multiple insecticides, leading to control failures. The results obtained will be beneficial to IPM recommendations for the use of effective insecticides against BPH. 相似文献
10.
This paper describes the characteristics of Na+-dependent d-glucose transport into liposomes made from soybean phospholipids into which have been reconstituted detergent-solubilized components from the rabbit renal proximal tubular brush border membrane. Conditions for optimal and quantitative reconstitution of glucose carriers are defined. Na+-dependent d-glucose uptake occurs via a saturable system with a of 0.125–0.135 mM, is responsive to the volume of the internal liposomal space, and shows ‘overshoot’ as seen in natural membranes. The rate of Na+-dependent d-glucose uptake and the magnitude of the ‘overshoot’ are proportional to the concentration of protein used in reconstitution. 相似文献