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| 1 | 满足欧4标准的发动机及其排放控制技术显示文摘北美、日本和欧洲这些交通运输高度发达的国家已经引用越来越严的排放法规。在国际化形势下,其他新兴市场对排放和燃油质量的控制也日益严格。发动机管理与排放控制系统相结合可以满足越来越严的法规。讨论了几种发动机排放控制系统的实例以及开发排放控制系统组合的方法。还对某些原设备制造商宣称能在不用NOx后处理的情况下达到美国2010重型车排放法规和欧5重型车排放法规的观点进行了探讨。 | Kumar S V | 2009 | 国外内燃机2009，41，1： | 15 |
| 2 | The role and significance of Magnesium in modern day research-A review显示文摘Magnesium is one of the largely available elements in the earth’s crust. It has a low structural density with high specific strength. This unique material property has forced an increase in the use of magnesium and its alloys in various applications pertaining to industrial sector,automobiles, aerospace and biomedical. Since magnesium is a highly reactive metal, it is prone to higher rate of corrosion as compared to its counterparts. Thus, it is essential to analyze the corrosion behavior of magnesium and its alloys in its applications. An appropriate process is to be followed in the design and development of magnesium alloys which overcome the limitations of magnesium and enhance the desired material properties in accordance to their applications. This review paper summarizes the importance of magnesium and its material properties. The influence of various alloying elements on the mechanical properties of magnesium is reviewed. The broad classification of Mg alloys and their behavioral trends are detailed. The corrosion behavior of magnesium and the influence of corrosion products on the material characteristics of magnesium, in aqueous medium, are discussed. The manufacturing techniques of magnesium alloys along with the secondary techniques are also covered. The various applications and the limitations of magnesium in these applications are covered. A complete section is dedicated towards detailing the recent trends of magnesium(Mg) alloys, i.e., the biodegradable nature and applications of Mg alloys. The influence of biocorrosion on Mg alloys and techniques to overcome it have been deliberated. This paper provides a thorough review on recent developments of magnesium with respect to engineering applications. | S V Satya Prasad S B Prasad Kartikey Verma Raghvendra Kumar Mishra Vikas Kumar Subhash Singh | 2022 | Journal of Magnesium and Alloys2022，10，1： | 11 |
| 3 | Pharmacognostic study and anti-inflammatory activity of Callistemon lanceolatus leaf显示文摘Objective:To study detail pharmacognosy and anti-inflammatory activity of Callistemon lanceolatus(C.lanceolatus) leaf.Methods:Leaf sample was studied by organoleptic, macroscopical,microscopical,phytochemical and other WHO recommended methods for standardizations.The methanolic leaf extract of the plant was also screened for antiinflammatory activity on carrageenan-induced paw edema in rat at doses of 200 and 400 mg/kg, orally.The detail pharmacognostic study of the C.lanceolatus leaf was carried out to lay down the standards which could be useful in future experimental studies.Results:C.lanceolatus methanolic leaf extract showed significant(P<0.0S) anti-inflammatory activity at doses of 200 mg/kg and 400 mg/kg.This significant anti-inflammatory of C.lanceolatus methanolic leaf extract at the dose of 400 mg/kg was comparable with diclofenac sodium.Conchuioiis:The pharmacognostic profile of the C.lanceolatus leaf is helpful in standardization for quality,purity and sample identification.The methanolic extract at a dose of 400 mg/kg shows a significant activity in comparison with the standard drug diclofenac sodium(50 mg/kg). | Kumar S Kumar V Prakash OM | 2011 | Asian Pacific Journal of Tropical Biomedicine2011，1，3： | 10 |
| 4 | Influence of heat treatment on the machinability and corrosion behavior of AZ91 Mg alloy显示文摘In the present study,AZ91 Mg alloy was heat treated at 410℃ for 6,12 and 24 h to investigate the influence of heat treatment on machinability and corrosion behavior.The effect of soaking time on the amount and distribution of Mg 17 Al 12(β-phase)was analyzed under the optical microscope.Microhardness measurements demonstrated the increased hardness with increased heat treatment soaking time,which can be attributed to the solid solution strengthening.The influence of super saturatedα-grains on reducing the cutting force(F z)with respect to increased cutting speed was observed as prominent.The corrosion behavior of the heat treated specimens was studied by conducting electrochemical tests.Surprisingly,corrosion rate of heat treated samples was observed as increased compared with the base material.From the results,it is evident that the machinability of AZ91 Mg alloy can be improved by producing super saturatedα-grains through heat treatment but at the cost of losing corrosion resistance. | Swetha Chowdary V Ravikumar Dumpala Anand Kumar S Kondaiah VV Ratna Sunil B | 2018 | Journal of Magnesium and Alloys2018，6，1： | 7 |
| 5 | Analysis on Critical Success Factors for Agile Manufacturing Evaluation in Original Equipment Manufacturing Industry-An AHP Approach显示文摘Manufacturing industries are facing challenges in the implementation of agile manufacturing in their products and processes.Agility is widely accepted as a new competitive concept in the manufacturing sector in fulfilling varying customer demand. Thus,evaluation of agile manufacturing in industries has become a necessity. The success of an organisation depends on its ability to manage finding the critical success factors and give them special and continued attention in order to bring about high performance. This paper proposes a set of critical success factors(CSFs) for evaluating agile manufacturing considered appropriate for the manufacturing sector.The analytical hierarchy process(AHP) method is applied for prioritizing the success factors, by summarizing the opinions of experts. It is believed that the proposed CSFs enable and assist manufacturing industries to achieve a higher performance in agile manufacturing so as to increase competitiveness. | C Ajay Guru Dev V S Senthil Kumar | 2016 | Chinese Journal of Mechanical Engineering2016，29，5： | 7 |
| 6 | Evaluating the effectiveness of marine actinobacterial extract and its mediated titanium dioxide nanoparticles in the degradation of azo dyes显示文摘Aim of the present study was to synthesize titanium dioxide nanoparticles(TiO2 NPs) from marine actinobacteria and to develop an eco-friendly azo-dye degradation method. A total of five actinobacterial isolates were isolated from Chennai marine sediments, Tamilnadu, India and analyzed for the synthesis of TiO2 NPs using titanium hydroxide. Among these, the isolate PSV 3 showed positive results for the synthesis of TiO2 NPs, which was confirmed by UV analysis. Further characterization of the synthesized TiO2 NPs was done using XRD, AFM and FT-IR analysis. Actinobacterial crude extract and synthesized TiO2 NPs was found efficient in degrading azo dye such as Acid Red 79(AR-79) and Acid Red 80(AR-80). Degradation percentage was found to be 81% for AR-79, 83% for AR-80 using actinobacterial crude extract and 84% for AR-79, 85% for AR-80 using TiO2 NPs. Immobilized actinobacterial cells showed 88% for AR-79 and 81% for AR-80, dye degrading capacity. Degraded components were characterized by FT-IR and GC-MS analysis. The phytotoxicity test with 500 μg/mL of untreated dye showed remarkable phenotypic as well as cellular damage to Tagetes erecta plant. Comparatively no such damage was observed on plants by degraded dye components. In biotoxicity assay, treated dyes showed less toxic effect as compared to the untreated dyes. | S Priyaragini S Veena D Swetha L Karthik G Kumar K V Bhaskara Rao | 2014 | Journal of Environmental Sciences2014，26，4： | 4 |
| 7 | Critical role of OX40 signaling in the TCR-independent phase of human and murine thymic Treg generation显示文摘Regulatory T cells(Tregs)play a pivotal role in immune-tolerance,and loss of Treg function can lead to the development of autoimmunity.Natural Tregs generated in the thymus substantially contribute to the Treg pool in the periphery,where they suppress self-reactive effector T cells(Teff)responses.Recently,we showed that OX40L(TNFSF4)is able to drive selective proliferation of peripheral Tregs independent of canonical antigen presentation(CAP-independent)in the presence of low-dose IL-2.Therefore,we hypothesized that OX40 signaling might be integral to the TCR-independent phase of murine and human thymic Treg(tTreg)development.Development of tTregs is a two-step process:Strong T-cell receptor(TCR)signals in combination with co-signals from the TNFRSF members facilitate tTreg precursor selection,followed by a TCR-independent phase of tTreg development in which their maturation is driven by IL-2.Therefore,we investigated whether OX40 signaling could also play a critical role in the TCR-independent phase of tTreg development.OX40−/−mice had significantly reduced numbers of CD25−Foxp3low tTreg precursors and CD25+Foxp3+mature tTregs,while OX40L treatment of WT mice induced significant proliferation of these cell subsets.Relative to tTeff cells,OX40 was expressed at higher levels in both murine and human tTreg precursors and mature tTregs.In ex vivo cultures,OX40L increased tTreg maturation and induced CAP-independent proliferation of both murine and human tTregs,which was mediated through the activation of AKT-mTOR signaling.These novel findings show an evolutionarily conserved role for OX40 signaling in tTreg development and proliferation,and might enable the development of novel strategies to increase Tregs and suppress autoimmunity. | Prabhakaran Kumar Alejandra Marinelarena Divya Raghunathan Vandhana K Ragothaman Shikha Saini Palash Bhattacharya Jilao Fan Alan L Epstein Ajay V Maker Bellur S Prabhakar | 2019 | Cellular & Molecular Immunology2019，16，2： | 4 |
| 8 | Antidiabetic and hypolipidemic activities of Kigelia pinnata flowers extract in streptozotocin induced diabetic rats显示文摘Objective:To evaluate antidiabetic and hypolipidemic activities of Kigelia pinnata rnethanolic(lowers extract in slreplozolocin(STZ) induced diabetic W islar rat.Methods.Rats were made diabetic by a single dose of STZ at 60 mg/kg body weight i.p.The blood glucose level was checked before and 72 h after STZ injection to confirm the development ot diabetes.The flower extract and glibenclamide were administered orally at the doses of 250 and 500 mg/kg body weight for 21 days.Results:Daily oral treatment with the extract and standard drug for 21 days significantly reduced blood glucose,serum cholesterol and triglycerides levels.High density lipoprotein-cholesterol level was found to be improved(P<0.01) as compared to diabetic control group.Conclusions:It is concluded that Kigellia pinnata flowers extract have significant antidiabetic and hypolipidemic effect. | Kumar S Kumar V Prakash OM | 2012 | Asian Pacific Journal of Tropical Biomedicine2012，2，7： | 4 |
| 9 | Antidiabetic and anti-lipemic effects of Cassia siamea leaves extract in streptozotocin induced diabetic rats显示文摘Objective:To investigate the antidiabetic and anti-lipemic effects of Cassia siamea methanolic leaves extract.Methods:The antidiabetic study was performed by measuring blood glucose level with elegance glucometer at weekly intervals i.e.0,7,14 and 21 in normal and streptozotocin induced diabetic rats.Total cholesterol,triglyceride and HDL-cholesterol were determined in normal and streptozotocin induces diabetic rats by autoanalyser.Glibenclamide was used as a reference drug at a dose of 10 mg/kg.Results:After the oral administration of extracts at doses of 250 mg/kg and 500 mg/kg for three weeks,blood glucose levels and body weights were significantly improved(P<0.01).Daily oral treatment with the extract also resulted in significantly reduction of serum cholesterol and triglycerides.HDL-cholesterol level was found to be improved to(P<0.01).Conclusions:The Cassia siamea leaf extract is useful in controlling blood glucose level as well as improving lipid metabolism and body weight in rats with induced diabetes. | S Kumar V Kumar Om Prakash | 2010 | Asian Pacific Journal of Tropical Medicine2010，3，11： | 3 |
| 10 | Improved dielectric and electro-optical parameters of nematic liquid crystal doped with magnetic nanoparticles显示文摘This study investigates the effect of magnetic nanoparticles(NPs) on the weakly polar nematic liquid crystal(NLC).Different parameters of dielectric data were measured for both the homeotropic and planar aligned samples as a function of frequency and temperature and the substantial changes have been noticed for the doped systems. Dielectric permittivity has been increased after the dispersion of magnetic NPs in the pure NLC. Dielectric anisotropy has also been influenced by incorporating the magnetic NPs with the NLC molecules. These results were attributed to the dipole–dipole interaction between the magnetic nanoparticles and nematic liquid crystal molecules. Electro-optical study indicated the faster rise time and fall time of the doped systems as compare to pure NLC. Threshold voltage has been calculated and found to be decreased for the doped systems. Moreover, we have also calculated the rotational viscosity and the splay elastic constant for pure and the doped systems. Both the rotational viscosity and splay elastic constant of the doped systems are found to be considerably lower than those of pure NLC. Change in these properties has been explained on the basis of molecular disturbances created by the interaction between the magnetic nanoparticle and LC director. This study reveals that the inclusion of magnetic NPs in weakly polar NLC can be useful to enhance the basic properties of the weakly polar NLC and make it a promising material for many display applications. | Geeta Yadav Govind Pathak Kaushlendra Agrahari Mahendra Kumar Mohd Sajid Khan V S Chandel Rajiv Manohar | 2019 | Chinese Physics B2019，28，3： | 2 |
| 11 | Non-destructive method of leaf-area determination in ash gourd ( Benincasa hispida) 显示文摘 | Radhakrishnan V V Kumar P G S Oommen A | 1991 | Indian Journal of Agricultural Sciences1991，61，1： | 1 |
| 12 | Frequency Estimation Techniques for High Dynamic Trajectories显示文摘 | Vilnrotter V A Hinedi S Kumar R | 1989 | IEEE Trans on Aerospace and Electronic Systems1989，25，4： | 1 |
| 13 | Comparative analysis of genetic diversity among Indian populations of Scirpophaga incertulas by ISSR-PCR and RAPD-PCR显示文摘 | Kumar L S Sawant A S Gupta V S | 2001 | Biochem Genet2001，39，： | 1 |
| 14 | Slug flow in curved microreactors : Hydrodynamic study显示文摘 | Kumar V Vashisth S Hoarau Y | 2007 | Chemical Engineering Science2007，62，： | 1 |
| 15 | Zinc biosorption on Tectona grandis L leaves biomass:Equilibrium and kinetic studies显示文摘 | Kumar Y P King P Prasad V S R K | 2006 | Chemical Engineering Journal2006，124，1： | 1 |
| 16 | Color doppler ultrasonography for treatment response prediction and evaluation in breast cancer 显示文摘 | Kumar A Srivastava V Singh S | 2010 | Future Oncol2010，6，8： | 1 |
| 17 | Modeling the mechanism involved during the sorption of methylene blue onto fly ash 显示文摘 | Kumar K V Ramamurthi V Sivanesan S | 2005 | J Colloid Inter Sci2005，284，1： | 1 |
| 18 | Electro-optic effect in c-axis oriented ZnO thin films prepared by rf magnetron sputtering显示文摘 | Gulia V Kumar S | 2007 | Optical Materials2007，29，： | 1 |
| 19 | Investigation of degeneracy of current-voltage characteristics of asymmetrical IGBT with n-buffer layer concentration显示文摘 | KHANNA V K KUMAR A SOOD S C | 2001 | Solid State Electronics2001，45，10： | 1 |
| 20 | Characterization of microstructures in Inconel 625 using X-ray diffraction peak broad- ening and lattice parameter measurements显示文摘 | RAI S K KUMAR A SHANKAR V | 2004 | Scripta Materialia2004，51，1： | 1 |
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