全文获取类型
收费全文 | 452篇 |
免费 | 27篇 |
国内免费 | 1篇 |
出版年
2023年 | 5篇 |
2022年 | 10篇 |
2021年 | 12篇 |
2020年 | 14篇 |
2019年 | 16篇 |
2018年 | 27篇 |
2017年 | 11篇 |
2016年 | 16篇 |
2015年 | 18篇 |
2014年 | 18篇 |
2013年 | 28篇 |
2012年 | 30篇 |
2011年 | 46篇 |
2010年 | 27篇 |
2009年 | 15篇 |
2008年 | 18篇 |
2007年 | 17篇 |
2006年 | 14篇 |
2005年 | 15篇 |
2004年 | 14篇 |
2003年 | 6篇 |
2002年 | 8篇 |
2001年 | 8篇 |
2000年 | 3篇 |
1999年 | 6篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1996年 | 3篇 |
1995年 | 8篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1991年 | 4篇 |
1989年 | 3篇 |
1988年 | 4篇 |
1987年 | 4篇 |
1986年 | 4篇 |
1982年 | 4篇 |
1981年 | 4篇 |
1980年 | 4篇 |
1979年 | 4篇 |
1978年 | 1篇 |
1977年 | 5篇 |
1976年 | 2篇 |
1975年 | 3篇 |
1974年 | 2篇 |
1973年 | 1篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1967年 | 2篇 |
1965年 | 1篇 |
排序方式: 共有480条查询结果,搜索用时 390 毫秒
471.
Nitika Arora Renu Bhardwaj Priyanka Sharma Hardesh Kumar Arora 《Acta Physiologiae Plantarum》2008,30(6):833-839
The effects of 28-homobrassinolide (28-homoBL) on seedling growth, lipid peroxidation and antioxidative enzyme activities
in the seedlings of Zea mays L. (var. Partap-1) under salt (NaCl) stress were studied. The surface-sterilized seeds were germinated in petriplates containing
different concentrations of NaCl (25, 50, 75 and 100 mM) only, 28-homoBL (10−7, 10−9 and 10−11 M) only and NaCl supplemented with 28-homoBL for 7 days. The activities of superoxide dismutase (SOD, EC 1.15.1.1), guaiacol
peroxidase (POD, EC 1.11.1.7), catalase (CAT, EC 1.11.1.6), ascorbate peroxidase (APOX, EC 1.11.1.11) and glutathione reductase
(EC 1.6.4.2) were analysed in 7 day-old seedlings. It was observed that 28-homoBL treatments reduced the toxicity of salt
on seedling growth considerably. Lipid peroxidation level was significantly increased under saline stress, but lowered with
28-homoBL applications revealing less oxidative damage. Further 28-homoBL treatments to the seedlings showed an enhancement
in activities of SOD, POD, CAT and APOX. The activities of all antioxidative enzymes were further increased in seedlings treated
with solution containing 28-homoBL and salt together as compared to seedlings treated with different concentration of salt
solution only. 相似文献
472.
Parvaiz Ahmad Mohammad Abass Ahanger Mohammed Nasser Alyemeni Leonard Wijaya Dilfuza Egamberdieva Renu Bhardwaj 《Journal of Plant Interactions》2017,12(1):429-437
This study examined the protective effect of Zn on salt-stressed Brassica juncea plants using some key morphological and biochemical attributes at different developmental stages (30, 60, and 90 days after treatment [DAT]). Salt stress (200?mM) caused suppression in plant height, root length, and dry weight by 58.35%, 41.15%, and 53.33%, respectively, at 90 DAT, but Zn application improved these variables by 15.52%, 16.59%, and 11.45%, respectively. Furthermore, 200?mM NaCl decreased total chlorophyll by 45.32% and relative water content by 27.62% at 90 DAT, whereas Zn application compensated the decrease in the levels of both variables. NaCl (200?mM) increased H2O2, malondialdehyde, and electrolyte leakage by 70.48%, 35.25%, and 68.39%, respectively, at 90 DAT, but Zn supplementation appreciably reduced these variables. Except for catalase, enzymatic antioxidant activity increased under NaCl stress. Zn application with salt further increased the activities of superoxide dismutase, catalase, ascorbate peroxidase, glutathione reductase, and glutathione-S-transferase by 33.51%, 9.21%, 10.98%, 17.46%, and 12.87%, respectively, at 90 DAT. At 90 DAT, salt stress increased flavonoids by 24.88%, and Zn supply by a further 7.68%. Overall, Zn mitigated the adverse effects of salt stress through osmotic adjustment, as well as by modulating the oxidative defense system and flavonoid contents. 相似文献
473.
Journal of Plant Growth Regulation - Flower fragrance appears as a fascinating facet to attract humans and has significant influence on human lives and in plant reproduction via attracting... 相似文献
474.
Journal of Ethology - The organized aerial manoeuvres of birds in “V” and “J” flock echelons have always captivated onlookers and several of these aspects are still a matter... 相似文献
475.
Humic acid in the form of sodium humate and fulvic acid markedly increased the growth and efficiency of nitrogen fixation
ofAzotobacter chroococcum. Fulvic acid proved more effective than the sodium humate. The effectiveness of these substances was more pronounced in increasing
the number of cells than affecting the nitrogen fixation. The increases in growth and nitrogen fixation were in direct proportion
to the quantities of sodium humate and fulvic acid applied up to 500 and 700 ppm respectively. Thereafter the growth was restricted,
although it was not inhibited even at 1,400 ppm. 相似文献
476.
477.
Kaur Ravdeep Yadav Poonam Thukral Ashwani Kumar Sharma Anket Bhardwaj Renu Alyemeni Mohammed N. Wijaya Leonard Ahmad Parvaiz 《Journal of Plant Growth Regulation》2018,37(1):286-299
Journal of Plant Growth Regulation - Brassinosteroids are known to manage various stresses including heavy metals in plants and castasterone is a bioactive form of brassinosteroids. Citric acid, a... 相似文献
478.
Although zinc in traces is essential for the growth and well being of the animal, however a long-term treatment has been found equally toxic to the liver and kidney. Present report describes its effects on few key enzymes viz. alkaline phosphatase, acid phosphatase, 5-nucleotidase, lipase, glucose-6-phosphatase, and cholinesterase in the liver of rat, Rattus rattus albino. Histochemical observations have provided visual evidences on Zn-induced dysenzymia. The results have further been interpreted in terms of its effects on cellular organelle, levels of enzyme protein and microenvironment of the hepatic parenchyma. 相似文献
479.
480.
Genetic markers and malaria. Observations in Gujarat, India 总被引:2,自引:0,他引:2
189 healthy controls and 175 patients suffering from malaria vivax have been investigated with regard to associations between this disease and 22 genetic polymorphisms of the blood (ABO, MN, Ss, Rh, Kell, P, Lutheran, Kidd, Duffy, Diego, Xg; ABH-Secretor; Hp, Gc, Gm, Km; aP, AK, PGM1, 6-PGD, EsD; Hb variants) Significant associations could be demonstrated only for P and Hp systems, though in accordance with other investigations it cannot be excluded that the ABO system plays also a role in this connection. 相似文献