全文获取类型
收费全文 | 424篇 |
免费 | 20篇 |
出版年
2023年 | 1篇 |
2022年 | 10篇 |
2021年 | 16篇 |
2020年 | 7篇 |
2019年 | 7篇 |
2018年 | 15篇 |
2017年 | 16篇 |
2016年 | 13篇 |
2015年 | 19篇 |
2014年 | 24篇 |
2013年 | 31篇 |
2012年 | 39篇 |
2011年 | 43篇 |
2010年 | 28篇 |
2009年 | 28篇 |
2008年 | 27篇 |
2007年 | 17篇 |
2006年 | 12篇 |
2005年 | 15篇 |
2004年 | 14篇 |
2003年 | 6篇 |
2002年 | 9篇 |
2001年 | 8篇 |
2000年 | 4篇 |
1999年 | 7篇 |
1998年 | 3篇 |
1997年 | 4篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1993年 | 4篇 |
1992年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1982年 | 1篇 |
1980年 | 2篇 |
1978年 | 2篇 |
1977年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有444条查询结果,搜索用时 31 毫秒
1.
J. Sherrod DeVerse Keith A. Bailey Greg A. Foster Vaishali Mittal Stuart M. Altman Scott I. Simon Anthony G. Passerini 《Journal of visualized experiments : JoVE》2012,(65)
Atherogenesis is potentiated by metabolic abnormalities that contribute to a heightened state of systemic inflammation resulting in endothelial dysfunction. However, early functional changes in endothelium that signify an individual''s level of risk are not directly assessed clinically to help guide therapeutic strategy. Moreover, the regulation of inflammation by local hemodynamics contributes to the non-random spatial distribution of atherosclerosis, but the mechanisms are difficult to delineate in vivo. We describe a lab-on-a-chip based approach to quantitatively assay metabolic perturbation of inflammatory events in human endothelial cells (EC) and monocytes under precise flow conditions. Standard methods of soft lithography are used to microfabricate vascular mimetic microfluidic chambers (VMMC), which are bound directly to cultured EC monolayers.1 These devices have the advantage of using small volumes of reagents while providing a platform for directly imaging the inflammatory events at the membrane of EC exposed to a well-defined shear field. We have successfully applied these devices to investigate cytokine-,2 lipid-3, 4 and RAGE-induced5 inflammation in human aortic EC (HAEC). Here we document the use of the VMMC to assay monocytic cell (THP-1) rolling and arrest on HAEC monolayers that are conditioned under differential shear characteristics and activated by the inflammatory cytokine TNF-α. Studies such as these are providing mechanistic insight into atherosusceptibility under metabolic risk factors. 相似文献
2.
Yuval Cohen Vaishali P. Chitnis Rachel Nechushtai Parag R. Chitnis 《Plant molecular biology》1993,23(4):895-900
We studied assembly of the PsaE subunit of photosystem I into photosynthetic membranes of cyanobacterial mutant strains that lack specific photosystem I subunits. Radiolabeled PsaE was incubated with photosynthetic membranes, and their binding and assembly were assayed by resistance to removal by chaotropic agents and proteolytic digestion. PsaE incorporated into the wild-type membranes was resistant to these treatments. In the absence of PsaD, it was resistant to proteolytic digestion, but was removed by NaBr. When the membranes were isolated from a mutant strain in which the psaF and psaJ genes have been inactivated, PsaE assembled in vitro could not be removed. PsaE could associate with the membranes of the strain DF in which the psaD, psaJ and psaF genes have been mutated. However, the radiolabeled PsaE associated with these membranes was removed both by the proteolytic as well as by the chaotropic agents. Characterization of PsaE present in vivo revealed similar results. These observations suggest that PsaD and PsaF/J may interact with PsaE and stabilize it in the photosystem I complex. 相似文献
3.
D. Mukesh S. Jadhav D. Sheth A. A. Banerji R. Newadkar H. S. Bevinakatti 《Biotechnology Techniques》1993,7(8):569-572
Summary Lipozyme catalysed esterification of oleic acid with lauryl alcohol was studied in a tubular recycle reactor. Water formed during the reaction was removed by adsorption, either by passing the product mixture through another column packed with molecular sieve, or by packing the reactor partially with silica gel. 相似文献
4.
K T Udapudi V B Yadwad G Jadhav V L Kallapur 《Indian journal of experimental biology》1989,27(8):732-734
Flight muscles of male moth, B. mori seem to utilize carbohydrate preferentially as a source of energy for all its acrobatic movements during the search for female moth. Depletion of triacylglycerol from flight muscles without affecting its level from fat body suggests that this lipid fraction serves as a source of energy in flight muscles during insemination processes. Significant depletion of triacylglycerol and glycogen from flight muscles of female moth after egg laying indicates that they are used to meet the energy requirement of female during oviposition activity. Depletion of proteins from flight muscles of male and female insects suggest that these proteins are transported to the accessory reproductive glands to meet their protein demand. 相似文献
5.
6.
Patil Prakash G. Jamma Shivani M. Singh N. V. Bohra Abhishek Parashuram Shilpa Injal Archana S. Gargade Vaishali A. Chakranarayan Manasi G. Salutgi Unnati D. Dhinesh Babu K. Sharma Jyotsana 《Physiology and Molecular Biology of Plants》2020,26(6):1249-1261
Physiology and Molecular Biology of Plants - The present study investigates the genetic diversity and population structure among 42 diverse pomegranate genotypes using a set of twenty one class I... 相似文献
7.
Shaikh Sarfaraz F. Dhavan Pratik P. Singh Pinky R. Vaidya S. P. Jadhav B. L. Ramana M. M. V. 《Russian Journal of Bioorganic Chemistry》2021,47(2):572-583
Russian Journal of Bioorganic Chemistry - A series of novel quinoline-benzoxazolinone ester hybrids were synthesized characterized and assessed for their in vitro anti-inflammatory and... 相似文献
8.
Harun Patel Rahul Pawara Iqrar Ansari Harsha Jadhav Sanjay Surana 《Journal of receptor and signal transduction research》2013,33(5-6):393-412
AbstractCardiotoxicity is one amongst the adverse effect of Osimertinib delineate in clinical trials and related to escalating doses. To triumph over the drawbacks of Osimertinib, in this study, we tend to delineate the design, synthesis, in vitro biological analysis of a series of novel reversible selective T790M inhibitors with minimal cardiotoxicity. Amongst the virtually sorted compounds; compound 18 and 74 have been located to be the foremost active compounds of the series with IC50 value of 0.88, 0.92?μM in cellular assay and 0.56, 0.62?μM in enzymatic assay, against double mutant L858R/T790M EGFR. Additionally, they showed much less affinity toward wild-type (WT)-EGFR with minimal cardiotoxicity. 相似文献
9.
A highly chitinolytic strain Penicillium ochrochloron MTCC 517 was procured from MTCC, Chandigarh, India. Culture medium supplemented with 1% chitin was found to be suitable for maximum production of chitinase. Purification of extracellular chitinase was done from the culture medium by organic solvent precipitation and DEAE-cellulose column chromatography. The chitinase was purified 6.92-fold with 29.9% yield. Molecular mass of purified chitinase was found to be 64 kDa by SDS-PAGE. The chitinase showed optimum temperature 40 °C and pH 7.0. The enzyme activity was completely inhibited by Hg2+, Zn2+, K+ and NH4+. The enzyme kinetic study of purified chitinase revealed the following characteristics, such as apparent Km 1.3 mg ml?1, Vmax 5.523 × 10?5 moles l?1 min?1 and Kcat 2.37 s?1 and catalytic efficiency 1.82 s?1 M?1. The enzyme hydrolyzed colloidal chitin, glycol chitin, chitosan, glycol chitosan, N,N′-diacetylchitobiose, p-nitrophenyl N-acetyl-β-d-glucosaminide and 4-methylumbelliferyl N-acetyl-β-d-glucosaminide. The chitinase of P. ochrochloron MTCC 517 is an exoenzyme, which gives N-acetylglucosamine as the main hydrolyzate after hydrolysis of colloidal chitin. Protoplasts with high regeneration capacity were obtained from Aspergillus niger using chitinase from P. ochrochloron MTCC 517. Since it also showed antifungal activity, P. ochrochloron MTCC 517 seems to be a promising biocontrol agent. 相似文献
10.
Priyanka Jadhav Bhushan PetkarYogesh Pore Anita KulkarniKishorkumar Burade 《Carbohydrate polymers》2013
In an attempt to improve the physicochemical properties of cefixime (CEF), its supramolecular inclusion compounds were prepared with β-cyclodextrin (βCD) and hydroxypropyl-β-cyclodextrin (HPβCD) in presence and/or absence of ternary component l-arginine (ARG) using spray drying technique. Initially, the phase solubility studies revealed a stoichiometry of 1:1 molar ratio with an AL-type of phase solubility curve. The stability constants of binary systems were remarkably improved in presence of ARG, indicating positive effect of its addition. The inclusion complexes were characterized by FTIR, XRPD, DSC, SEM, particle size analysis, and dissolution studies. Further, molecular mechanic (MM) calculations were performed to investigate the possible orientations of CEF inside βCD cavity in presence and/or absence of ternary component. In case of physicochemical studies, the ternary systems performed well as a result of comprehensive effect of ternary complexation and particle size reduction achieved by a spray drying technology. 相似文献