http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Kamatchi, Thangavel Sathiya,Chitrapriya, Nataraj,Lee, Hyosun,Fronczek, Chris F.,Fronczek, Frank R.,Natarajan, Karuppannan The Royal Society of Chemistry 2012 Dalton transactions Vol.41 No.7
<P>With the aim to develop more efficient, less toxic, target specific metal drugs and evaluate their anticancer properties in terms of oxidation state and co-ligand sphere, a sequence of Ru<SUP>II</SUP>, Ru<SUP>III</SUP> complexes bearing 4-hydroxy-pyridine-2,6-dicarboxylic acid and PPh<SUB>3</SUB>/AsPh<SUB>3</SUB> were synthesized and structurally characterized. Biological studies such as DNA binding, antioxidant assays and cytotoxic activity were carried out and their anticancer activities were evaluated. Interactions of the complexes with calf thymus DNA revealed that the triphenylphosphine complexes could bind more strongly than the triphenylarsine complexes. The free radical scavenging ability, assessed by a series of <I>in vitro</I> antioxidant assays involving DPPH radical, hydroxyl radical, nitric oxide radical, superoxide anion radical, hydrogen peroxide and metal chelating assay, showed that the Ru<SUP>III</SUP> complexes possess excellent radical scavenging properties compared to those of Ru<SUP>II</SUP>. Cytotoxicity studies using three cancer lines <I>viz</I> HeLa, HepG2, HEp-2 and a normal cell line NIH 3T3 showed that Ru<SUP>II</SUP> complexes exhibited substantial cytotoxic specificity towards cancer cells. Furthermore, the Ru<SUP>II</SUP> complexes were found to be superior to Ru<SUP>III</SUP> complexes in inhibiting the growth of cancer cells.</P> <P>Graphic Abstract</P><P>We investigate the effects of oxidation states of ruthenium and the size of the ligands present in the complexes on DNA binding, antioxidant activity and cytotoxicity. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1dt11273b'> </P>
Study on the ferromagnetism in Co and N doped ZnO thin films
S. Ramasubramanian,R. Thangavel,M. Rajagopalan,A. Thamizhavel,K. Asokan,D. Kanjilal,J. Kumar 한국물리학회 2013 Current Applied Physics Vol.13 No.8
Present investigation reports the structural, optical and magnetic properties of co-doping of Co and N ions in ZnO samples, prepared by two distinct methods. In the first method, samples are synthesized by Solegel technique in which the Co and N are co-doped simultaneously during the growth process itself. In the second case, N ions are implanted in the Co doped ZnO thin films grown by Pulsed Laser Deposition (PLD). Structural studies showed that the nitrogen implantation on Co doped ZnO samples developed compressive stress in the films. X-ray photoelectron spectroscopy confirmed the doping of Co and N in ZnO matrix. In the Resonant Raman scattering multiple LO phonons up to fifth order are observed in the (Co, N) co-doped ZnO. Photoluminescence spectra showed that there is reduction in the bandgap due to the presence of Co in the lattice and also the presence of Zn vacancies in the films. All samples showed ferromagnetic behavior at room temperature. The magnetic moment observed in the implanted films is found to be varied with the different dosages of the implanted N ions. First principle calculations have been carried out to study the possible magnetic interaction in the co-doped system. Present study shows that the ferromagnetic interaction is due to the hybridization between N 2p and Co 3d states in the (Co, N) co-doped ZnO and is very sensitive to the geometrical configurations of dopants and the vacancy in the ZnO host lattice.
High Volumetric Energy Density Hybrid Supercapacitors Based on Reduced Graphene Oxide Scrolls
Rani, Janardhanan R.,Thangavel, Ranjith,Oh, Se-I,Woo, Jeong Min,Chandra Das, Nayan,Kim, So-Yeon,Lee, Yun-Sung,Jang, Jae-Hyung American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.27
<P>The low volumetric energy density of reduced graphene oxide (rGO)-based electrodes limits its application in commercial electrochemical energy storage devices that require high-performance energy storage capacities. in small volumes. The volumetric energy density of rGO-based electrode materials is very low due to their low packing density. A supercapacitor with enhanced packing density and high volumetric energy density is fabricated using doped rGO scrolls (GFNSs) as the electrode material. The restacking of rGO sheets is successfully controlled through synthesizing the doped scroll structures while increasing the packing density. The fabricated cell exhibits an ultrahigh volumetric energy density of 49.66 Wh/L with excellent cycling stability (>10000 cycles). This unique design strategy for the electrode material has significant potential for the future super capacitors with high volumetric energy densities.</P>
Biobutanol as a promising liquid fuel for the future - recent updates and perspectives
Pugazhendhi, Arivalagan,Mathimani, Thangavel,Varjani, Sunita,Rene, Eldon R.,Kumar, Gopalakrishnan,Kim, Sang-Hyoun,Ponnusamy, Vinoth Kumar,Yoon, Jeong-Jun Elsevier 2019 Fuel Vol.253 No.-
<P><B>Abstract</B></P> <P>Butanol is a potential alternative fuel for compensating the depletion of fossil based liquid fuels. Butanol can be easily mixed with either gas or petrol, at any percentage and used as a fuel. <I>Clostridia</I> are the main fermentative organisms used for the production of biobutanol. They are potentially known for their capacity to ferment different types of renewable biomass to butanol through the acetone-butanol-ethanol (ABE) fermentation pathway. This review deals with the mechanism of biobutanol production from biomass feedstocks and the issues and challenges involved in the production of biobutanol. The different types of anaerobic biobutanol production namely fed-batch fermentation, continuous fermentation, and two-stage continuous fermentation have been clearly enunciated. Further, different butanol recovery methods such as adsorption, gas stripping and pervaporation have also been discussed in this review. Certain issues affecting the biobutanol production such as sporulation and solventogenesis have been summarized. These types of problems could be overcome by metabolic engineering of <I>Clostridia</I>, which will enhance the resistance of the microorganisms towards high solvent concentrations and thereby increasing the solvent production. The genetic engineering approach is able to overcome the constraints with wild-type strain by understanding the process of solventogenesis in order to construct or modify the strains with improved downstream processing potential for economically advantageous biobutanol production.</P>
Hand arm vibration measurement using micro-accelerometer in different brick structures
Gomathi, K.,Senthilkumar, A.,Shankar, S.,Thangavel, S.,Priya, R. Mohana Techno-Press 2014 Smart Structures and Systems, An International Jou Vol.13 No.6
Hand-Arm Vibration Syndrome (HAVS) is a group of diseases caused by exposure of the hands to vibration while operating the hand held power tools such as road breaker, drilling machine, demolition hammer in construction works. In this paper, area-changed capacitive micro-accelerometer is designed to measure the vibration exposure on worker's hand when operating a drilling machine on various blocks such as clay block, paver block and solid cement block. The design process includes mathematical modelling of micro-accelerometer and simulations are done using INTELLISUITE 8.6. Experimental results are taken for various blocks surfaces using conventional and micro-accelerometer. Comparisons show that usage of area-changed micro-accelerometer for Hand-arm vibration monitoring provides better sensitivity, which in turn reduces the risk of HAVS in workers.
Hand arm vibration measurement using micro-accelerometer in different brick structures
K. Gomathi,A. Senthikumar,S. Shankar,S. Thangavel,R. Mohana priya 국제구조공학회 2014 Smart Structures and Systems, An International Jou Vol.13 No.6
Hand-Arm Vibration Syndrome (HAVS) is a group of diseases caused by exposure of the hands to vibration while operating the hand held power tools such as road breaker, drilling machine, demolition hammer in construction works. In this paper, area-changed capacitive micro-accelerometer is designed to measure the vibration exposure on worker's hand when operating a drilling machine on various blocks such as clay block, paver block and solid cement block. The design process includes mathematical modelling of micro-accelerometer and simulations are done using INTELLISUTTE 8.6. Experimental results are taken for various blocks surfaces using conventional and micro-accelerometer. Comparisons show that usage of are-changed micro-accelerometer for Hand-arm vibration monitoring provides better sensitivity, which in turn reduces the risk of HAVS in workers.