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| 1 | Synthesis,characterization and evaluation of polyacrylamide graft starch/clay nanocomposite hydrogel system for enhanced oil recovery显示文摘In this paper the suitability of a graft polymer nanocomposite hydrogel system for enhanced oil recovery was examined using polyacrylamide graft starch/clay nanocomposite(a laboratory synthesized product) and chromium(III) acetate(crosslinker). X-ray diffraction analysis,Fourier transform infrared spectrometry analysis, field-emission scanning electron microscopy and transmission electron microscopy were carried out to reveal the laboratory synthesized product as a nanocomposite. The effects of various parameters like salt concentration, p H, temperature, polymer concentration and crosslinker concentration on the properties of the developed gel system were systematically evaluated.The thermal stability of the nanocomposite gel and the conventional gel system were also determined by thermogravimetric analysis. The graft polymer nanocomposite gel system exhibited acceptable gel strength, gelation time and gel stability compared with the conventional gel system. The nanocomposite gels prepared using a low crosslinker concentration showed higher gel strength and required longer gelation time than the conventional gel which is more desirable properties for the effective placement of gel during enhanced oil recovery operations. In addition, sand pack flooding experiments show that the graft polymer nanocomposite gels had better plugging capacity than the conventional gel systems under reservoir conditions. Hence, this gel system may be suitable in the water shutoff treatments required for enhanced oil recovery from oilfields. | Rituraj Singh Vikas Mahto | 2017 | Petroleum Science2017，14，4： | 7 |
| 2 | Computational and Structural Investigation of Deleterious Functional SNPs in Breast Cancer BRCA2 Gene显示文摘In this work, we have analyzed the genetic variation that can alter the expression and the function in BRCA2 gene using computational methods. Out of the total 534 SNPs, 101 were found to be non synonymous (nsSNPs). Among the 7 SNPs in the untranslated region, 3 SNPs were found in 5′ and 4 SNPs were found in 3′ un-translated regions (UTR). Of the nsSNPs 20.7% were found to be damaging by both SIFT and PolyPhen server among the 101 nsSNPs investigated. UTR resource tool suggested that 2 SNPs in the 5′ UTR region and 4 SNPs in the 3′ UTR regions might change the protein expression levels. The mutation from asparagine to isoleucine at the position 3124 of the native protein of BRCA2 gene was most deleterious by both SIFT and PolyPhen servers. A structural analysis of this mutated protein and the native protein was made which had an RMSD value of 0.301 nm. Based on this work, we proposed that this most deleterious nsSNP with an SNPid rs28897759 is an important candidate for the cause of breast cancer by BRCA2 gene. | Rajasekaran R George Priya Doss Sudandiradoss C Ramanathan K Rituraj Purohit Rao Sethumadhavan | 2008 | 生物工程学报2008，24，5： | 1 |
| 3 | Natural antitubulin agents: importance of 3,4,5-trimethoxyphenyl fragment显示文摘 | Arvind S. Negi Yashvir Gautam Sarfraz Alam Debabrata Chanda Suaib Luqman Jayanta Sarkar Feroz Khan Rituraj Konwar | 2014 | Bioorganic & Medicinal Chemistry2014，，： | 1 |
| 4 | Factors having implications on re-retinal detachments after silicone oil removal显示文摘 | Manish PN Rituraj PV Kamal MN | 2012 | Indian J Ophthalmol2012，60，6： | 1 |
| 5 | Indirect reversed-phase high-performance liquid chromatographic and direct thin- layer chromatographic enantioresolution of( R, S) -cinacal- cet 显示文摘 | Ravi Bhushan Rituraj Dubey | 2011 | Biomed Chromatogr2011，25，6： | 1 |
| 6 | Rigid body dynamics modeling, experimental characterization, and performance analysis of a howitzer显示文摘A large caliber howitzer is a complex and cumbersome assembly. Understanding its dynamics and performance attributes' sensitivity to changes in its design parameters can be a very time-consuming and expensive exercise, as such an effort requires highly sophisticated test rigs and platforms. However, the need of such an understanding is crucially important for system designers, users, and evaluators. Some of the key performance attributes of such a system are its vertical jump, forward motion, recoil displacement, and force transmitted to ground through tires and trail after the gun has been fired. In this work, we have developed a rigid body dynamics model for a representative howitzer system, and used relatively simple experimental procedures to estimate its principal design parameters. Such procedures can help in obviating the need of expensive experimental rigs, especially in early stages of the design cycle. These parameters were subsequently incorporated into our simulation model,which was then used to predict gun performance. Finally, we conducted several sensitivity studies to understand the influence of changes in various design parameters on system performance. Their results provide useful insights in our understanding of the functioning of the overall system. | Nachiketa TIWARI Mukund PATIL Ravi SHANKAR Abhishek SARASWAT Rituraj DWIVEDI | 2016 | Defence Technology(防务技术)2016，12，6： | 0 |
| 7 | 有关血管紧张素转换酶抑制剂的一些新老问题(续前)显示文摘2.8稳定动脉斑块 血管紧张素Ⅱ(angiotensinⅡ,AngⅡ)可以刺激内皮素释放。内皮素是一种最强的冠状动脉收缩因子,在冠状动脉易损斑块存在的前提下,内皮素的释放可能会导致斑块破裂。低镁血症能引起冠状动脉血管反应性增加,促进斑块破裂。AngⅡ能够导致与镁缺乏相关的多种变化,包括诱导促氧化剂和促炎因子的生成。而且,AngⅡ能诱导内皮细胞合成纤溶酶原激活物抑制因子1。 | Kashif Hanif Hemant K Bid Rituraj Konwar 张刘锋 | 2011 | 中华高血压杂志2011，19，5： | 0 |
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