全文获取类型
收费全文 | 114篇 |
免费 | 3篇 |
专业分类
林业 | 7篇 |
农学 | 25篇 |
9篇 | |
综合类 | 16篇 |
农作物 | 5篇 |
水产渔业 | 4篇 |
畜牧兽医 | 34篇 |
园艺 | 6篇 |
植物保护 | 11篇 |
出版年
2022年 | 2篇 |
2019年 | 1篇 |
2018年 | 3篇 |
2017年 | 1篇 |
2016年 | 1篇 |
2015年 | 3篇 |
2014年 | 1篇 |
2013年 | 7篇 |
2012年 | 8篇 |
2011年 | 7篇 |
2010年 | 7篇 |
2009年 | 4篇 |
2008年 | 4篇 |
2007年 | 5篇 |
2006年 | 4篇 |
2005年 | 2篇 |
2004年 | 4篇 |
2003年 | 7篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1999年 | 3篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1994年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 2篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1970年 | 3篇 |
1969年 | 4篇 |
1968年 | 2篇 |
1967年 | 2篇 |
1966年 | 1篇 |
1965年 | 1篇 |
1963年 | 1篇 |
1924年 | 1篇 |
排序方式: 共有117条查询结果,搜索用时 15 毫秒
71.
Patankar Gaurang V. Tambe Amruta S. Kulkarni Bhaskar D. Malyshew Alexander Kamble Sanjay P. 《Water, air, and soil pollution》2013,224(9):1-13
Water, Air, &; Soil Pollution - High applications of P fertilizers and manure are general practice in intensive agriculture and may cause eutrophication in adjacent streams. Bioavailability of P... 相似文献
72.
W. Stuart W. M. Peacock W. S. Baird W. Saxby Blair R. H. Helmer W. H. Hicks W. R. Leslie B. F. Lutman H. H. Mann S. D. Nagpurkar G. S. Kulkarni R. S. Kasargode S. R. Paranjupe B. M. Joshi J. A. McClary W. C. Mckillican Wm. H. Martin A. M. Musser C. A. Ludwig C. F. Clark R. G. Newton T. H. Parks E. E. Clayton F. H. Reed R. N. Salaman E. M. Straight C. T. Tice W. C. Edmundson M. J. Tinline H. O. WERNER R. F. Howard C. F. Clark C. M. White T. K. Wolfe 《American Journal of Potato Research》1924,1(4):54-66
73.
Genistein is an active soy isoflavone with anticancer activities, but it is unknown why it has a higher oral bioavailability in female than in male rats. Our study determined the effects of estrus cycle on genistein's oral bioavailability. Female rats with various levels of estrogen were orally administered with genistein or used in a four-site rat intestinal perfusion experiment. Rats in "proestrus" group (with elevated estrogen) had significantly reduced (57% decrease, p < 0.05) oral bioavailability of total genistein (aglycone + conjugates) than those in "metoestrus" group (with basal level of estrogen). Female ovariectomized rats, due to lack of estrogen, showed oral bioavailability of total genistein similar to the "metoestrus" group but higher (155% increase, p < 0.05) than the "proestrus" group. On the basis of intestinal perfusion studies, the increased bioavailability was partially attributed to the higher (>100% increase, p < 0.05) hepatic disposition via glucuronidation and possibly more efficient enterohepatic recycling of genistein in the "metoestrus" group. Furthermore, chronic exogenous supplementation of estradiol in ovariectomized rats significantly reduced (77%, p < 0.05) the oral bioavailability of total genistein, mostly via increased sulfation (>10-fold) in liver, to a level comparable to those in the "proestrus" group. In conclusion, the oral bioavailability of total genistein was inversely proportional to elevated estrogen levels in female rats, which is partially mediated through the regulation of hepatic enzymes responsible disposition of genistein. 相似文献
74.
Interactions between a plant growth‐promoting rhizobacterium and smoke‐derived compounds and their effect on okra growth
下载免费PDF全文
![点击此处可从《植物养料与土壤学杂志》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Heino B. Papenfus Manoj G. Kulkarni Wendy A. Stirk Kannan R. R. Rengasamy M. Victoria Salomon Patricia Piccoli Rubén Bottini Johannes van Staden 《植物养料与土壤学杂志》2015,178(5):741-747
Plant growth‐promoting rhizobacteria (PGPR) are used in agriculture to improve crop yield. Crude smoke–water (made by bubbling plant‐derived smoke through water) stimulates germination and improves seedling growth. Some active compounds have been isolated from smoke with karrikinolide (KAR1) stimulating plant growth and trimethylbutenolide (TMB) being inhibitory. These smoke compounds have great potential in agriculture but their interaction with PGPR is unknown. In the present study, a two‐factorial pot trial with three replicates per treatment was designed to investigate the interactions between Bacillus licheniformis and two concentrations each of smoke–water, KAR1, and TMB on okra (Abelmoschus esculentus). Growth and physiological parameters (chlorophyll, carotenoid, protein, sugar and α‐amylase) of okra as well as bacterial abundance in the rhizosphere were measured after 5 weeks. Application of B. licheniformis and 10?7 M KAR1 significantly improved the shoot biomass and 10?7 M KAR1 also significantly improved leaf area of okra. However, when 10?7 M KAR1 was applied in combination with B. licheniformis, there was an antagonistic effect on plant growth. While TMB had a negative effect on plant growth, a combination treatment of TMB and B. licheniformis overcame the inhibitory effect of TMB resulting in plant growth similar to the control plants. All treatments had no effect on chlorophyll, carotenoid, protein and sugar concentrations, while α‐amylase activity was significantly elevated in okra root treated with 1:500 (v/v) smoke–water. Determining the rhizobacteria populations at harvest showed that all treatments had no significant effect on the rhizosphere microbial abundance. The modes of interaction between PGPR and smoke‐derived compounds need to be further elucidated. 相似文献
75.
Yun-Hee Choi Dong Joo Yang Atul Kulkarni Sang Hyun Moh Ki Woo Kim 《Marine drugs》2015,13(12):7055-7066
Mycosporine-like amino acids (MAAs) are secondary metabolites found in diverse marine, freshwater, and terrestrial organisms. Evidence suggests that MAAs have several beneficial effects on skin homeostasis such as protection against UV radiation and reactive oxygen species (ROS). In addition, MAAs are also involved in the modulation of skin fibroblasts proliferation. However, the regulatory function of MAAs on wound repair in human skin is not yet clearly elucidated. To investigate the roles of MAAs on the wound healing process in human keratinocytes, three MAAs, Shinorine (SH), Mycosporine-glycine (M-Gly), and Porphyra (P334) were purified from Chlamydomonas hedlyei and Porphyra yezoensis. We found that SH, M-Gly, and P334 have significant effects on the wound healing process in human keratinocytes and these effects were mediated by activation of focal adhesion kinases (FAK), extracellular signal-regulated kinases (ERK), and c-Jun N-terminal kinases (JNK). These results suggest that MAAs accelerate wound repair by activating the FAK-MAPK signaling pathways. This study also indicates that MAAs can act as a new wound healing agent and further suggests that MAAs might be a novel biomaterial for wound healing therapies. 相似文献
76.
Gonzalez E Kulkarni H Bolivar H Mangano A Sanchez R Catano G Nibbs RJ Freedman BI Quinones MP Bamshad MJ Murthy KK Rovin BH Bradley W Clark RA Anderson SA O'connell RJ Agan BK Ahuja SS Bologna R Sen L Dolan MJ Ahuja SK 《Science (New York, N.Y.)》2005,307(5714):1434-1440
Segmental duplications in the human genome are selectively enriched for genes involved in immunity, although the phenotypic consequences for host defense are unknown. We show that there are significant interindividual and interpopulation differences in the copy number of a segmental duplication encompassing the gene encoding CCL3L1 (MIP-1alphaP), a potent human immunodeficiency virus-1 (HIV-1)-suppressive chemokine and ligand for the HIV coreceptor CCR5. Possession of a CCL3L1 copy number lower than the population average is associated with markedly enhanced HIV/acquired immunodeficiency syndrome (AIDS) susceptibility. This susceptibility is even greater in individuals who also possess disease-accelerating CCR5 genotypes. This relationship between CCL3L1 dose and altered HIV/AIDS susceptibility points to a central role for CCL3L1 in HIV/AIDS pathogenesis and indicates that differences in the dose of immune response genes may constitute a genetic basis for variable responses to infectious diseases. 相似文献
77.
78.
R. N. Kulkarni 《Euphytica》1994,78(1-2):103-107
Summary Phenotypic recurrent selection was carried out for oil content in East Indian lemongrass, Cymbopogon flexuosus (Steud) Wats. In each cycle, the top 5% of plants for oil content were selected. Their ramets were used for the establishment of replicated polycross blocks in isolation. Realized gains from selection were determined by evaluating the populations and the best clones from each population in separate two-year replicated trials. Three cycles of recurrent selection increased oil content by 32% per cycle at the population level. Realized gains from selection were slightly smaller or similar to predicted gains. Mean realized heritability for oil content was 0.56. At the clonal level, the best C1 and the best C2 clones had, respectively, a 22% and 73% higher oil content than the best clone from the base population (C0). Selection for oil content did not adversely affect leaf yield, dry matter content or citral content in oil. Probable reasons for the high response to selection are mentioned. 相似文献
79.
Inheritance of resistance to dieback, caused by Pythium aphanider‐matum, in periwinkle (Catharanthus roseus) was studied using a dieback‐resistant dwarf mutant, Dw, with a green stem, and a susceptible accession, OR, with a purple stem. Plants of parental F1, F2 and backcross generations were evaluated for resistance to dieback in a randomized complete block design with four replications, in a field plot that had been continuously planted with periwinkle in previous years and where dieback severity was high. Resistance to dieback was evaluated on two dates, i.e. when distinct differences between plants of the parental strains were noticed. From both quantitative and qualitative analyses of data, resistance to dieback appeared to be governed by a single gene (with a broad‐sense heritability of 0.85 and 0.79, depending on the date of evaluation), and was inherited independently of genes governing dwarfness and stem pigmentation. 相似文献
80.
M. G. Kulkarni S. G. Sparg M. E. Light J. van Staden 《Journal of Agronomy and Crop Science》2006,192(5):395-398
The newly identified smoke‐compound butenolide (3‐methyl‐2H‐furo[2,3‐c]pyran‐2‐one) can improve seedling vigour. This study highlights the effects of smoke‐water and butenolide on shoot and root elongation of a local rice variety. Smoke‐water (1 : 500) and butenolide (10?8 m ) treatments significantly increased shoot length. A low concentration of butenolide (10?10 m ) promoted maximum root length and seedling weight, which were significantly different from the control. Butenolide‐treated (10?8 m ) seedlings had a significantly greater number of lateral roots than untreated seedlings. The vigour index of smoke‐water (1 : 500) and butenolide‐treated (10?8 m ) rice seeds was significantly higher than that of untreated seeds. These findings suggest the possible use of butenolide for promoting vigorous seedlings in rice. 相似文献