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Journal of Rare Earths 2012年第12期30卷 1270-1275页

作者： S.Radhika V.Nagaraju b.Nagaphani Kumar M.Lakshmi Kantam b.ramachandra reddy Inorganic Chemistry Division Indian Institute of Chemical Technology(IICT) Rubamin Limited Halol-389 350India

Solid-liquid extraction of gadolinium was investigated from phosphoric acid medium using commercial amino phosphonic acid resin, Tulsion CH-93. The experimental conditions studied included equilibration time, acid concentration, mass of the resin, metal concentration, loading and elution. The percent extraction of Gd（Ⅲ） was studied as a function of phosphoric acid （0.05-3 mol/L） using Tulsion CH-93 resin. The corresponding lgD vs. equilibrium pH plot gave straight line with a slope of 1.8. The percent extraction decreased with acid co centration increasing, conforming ion exchange mechanism. Under observed experimental conditions the loading capacity of Tulsion CH-93 for gadolinium was 10.6 mg/g. Among several eluants screened, the quantitative elution of Gd（III） from loaded Tulsion CH-93 was obtained with ammonium oxalate （0.15 mol/L）. The extraction behavior of commonly associated metals with gadolinium was studied as a function of phosphoric acid concentration. Tulsion CH-93 resin showed selective extraction towards heavy rare earths （Lu and Yb） which could be separated from other rare earths at 3 mol/L H3PO4, similar to wet phosphoric acid （3-5 mol/L）. On the other hand Gd（Ⅲ） and other rare earths were studied with chelating resin Tulsion CH-90. Light rare earths were highly extracted and these could be separated from heavy rare earths and Gd.

关键词： gadolinium phosphoric acid Tulsion CH-93 Tulsion CH-90 separation factors rare earths

Annealing effects on the structural and optical properties of ZnO nanoparticles with PVA and CA as chelating agents

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Journal of Advanced Ceramics 2015年第2期4卷 123-129页

作者： A.N.MALLIKA A.ramachandra reddy K.Venugopal reddy Department of Physics Materials Science LaboratoryNational Institute of TechnologyWarangal-506004TelanganaIndia

The effects of annealing temperatures and chelating agents on the structural and optical properties of ZnO nanoparticles were *** average particle size of ZnO nanoparticles increased with increase of annealing *** decrease of the full width at half maximum(FWHM)with increasing annealing temperatures inferred increase of particle/grain *** grain sizes were also observed to be increased with increase of annealing *** the absorption spectra of the samples,the absorption was red-shifted and the energy band gap was blue-shifted with increase of annealing temperatures.A sharp UV emission peak was observed and the intensity of this peak increased with annealing temperatures corresponding to the high crystallinity in the *** high annealing temperature of 700℃,ZnO exhibited a less intense deep level *** negligible deep level emission was attributed to the oxygen vacancies created at higher annealing temperatures.

关键词： ZnO nanostructures citric acid(CA) polyvinyl alcohol(PVA) chelating agents scanning electron microscopy(SEM) optical properties

Egg-derived tyrosine phosphatase as a Potential biomarker for Muscle Ageing and Degeneration in Drosophila melanogaster

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Journal of Genetics and Genomics 2014年第4期41卷 221-224页

作者： Salam Herojeet Singh Nallur b.ramachandra Upendra Nongthomba Molecular Reproduction Development and GeneticsIndian Institute of Science Department of Studies in Zoology University of MysoreManasagangotri

Ageing is associated with declined activity of behaviors, physiology and metabolic processes （Arking, 2006）. In- vestigations in model organisms have indicated the exis- tence of ＂functional senescence＂, the progressive decline of biological functions with age and the decline in the activity may vary from tissue to tissue. Consequently, studies per- taining to the key organs/tissues whose functions deterio- rate/fail with age have led to the development of tissue specific ageing biomarkers （Grotewiel et al., 2005; Demontis et al., 2013）.

关键词： Egg-derived tyrosine phosphatase as a Potential biomarker for Muscle Ageing and Degeneration in Drosophila melanogaster gene

Synthesis and optical characterization of porous ZnO

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Journal of Advanced Ceramics 2013年第3期2卷 260-265页

作者： K.SOWRI bAbU A.ramachandra reddy Ch.SUJATHA K.VENUGOPAL reddy A.N.MALLIKA Department of Physics National Institute of Technology WarangalWarangal-506004Andhra PradeshIndia

In this paper,a simple and cheap method to prepare porous ZnO by using zinc nitrate,ethanol and triethanolamine(TEA)is *** as-prepared sample consisted of nano and micro *** sample was calcined at 300℃,400℃and 500℃with different heating *** 500℃,the nano pores disappeared but the sample maintained its micro *** emission scanning electron microscopy(FE-SEM)pictures confirmed that the size and growth of ZnO nanoparticles depended on the heating *** infrared(IR)absorption peak of Zn-O stretching vibration positioned at 457 cm^(-1)was split into two peaks centered at 518 cm^(-1)and 682 cm^(-1)with the change of *** results confirmed that Fourier transform infrared(FT-IR)spectrum was sensitive to variations in particle size,shape and *** photoluminescence(PL)spectrum of porous ZnO contained five emission peaks at 397 nm,437 nm,466 nm,492 nm and 527 *** intensity enhanced monotonously with increase of temperature and the change was rapid between temperatures of 300℃and 500℃.This was due to the elimination of organic species and improvement in the crystallanity of the sample at 500℃.

关键词： semiconductors porous ZnO optical properties

CompactChain:an efficient stateless chain for UTXO-model blockchain

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Frontiers of Computer Science 2024年第2期18卷 167-179页

作者： b Swaroopa reddy T Uday Kiran reddy Department of Electrical Engineering Indian Institute of Technology HyderabadHyderabadTelangana 502285India

In this work,we propose a stateless blockchain called CompactChain,which compacts the entire state of the UTXO(Unspent Transaction Output)based blockchain systems into two RSA *** first accumulator is called Transaction Output(TXO)commitment which represents the TXO *** second one is called Spent Transaction Output(STXO)commitment which represents the STXO *** this work,we discuss three algorithms:(i)To update the TXO and STXO commitments by the *** miner also provides the proofs for the correctness of the updated commitments;(ii)To prove the transaction’s validity by providing a membership witness in TXO commitment and non-membership witness against STXO commitment for a coin being spent by a user;(iii)To update the witness for the coin that is not yet spent;The experimental results evaluate the performance of the CompactChain in terms of time taken by a miner to update the commitments and time taken by a validator to verify the commitments and validate the *** compare the performance of CompactChain with the existing state-of-the-art works on stateless *** shows a reduction in commitments update complexity and transaction witness size which inturn reduces the mempool size and propagation latency without compromising the system throughput(Transactions per second(TPS)).

关键词： stateless blockchain RSA Accumulator STXO commitment TXO commitment UTXO Non-interactive Proof of Exponentiation(NI-PoE) Transactions per second(TPS)

Modelling,Analysis and Computation in Plasticity

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Acta Mathematica Sinica,English Series 2019年第1期35卷 64-82页

作者： b.Daya reddy Department of Mathematics and Applied Mathematics University of Cape Town

The typical problem in the mechanics of deformable solids comprises a mathematical model in the form of systems of partial differential equations or inequalities. Subsequent investigations are then concerned with analysis of the model to determine its well-posedness, followed by the development and implementation of algorithms to obtain approximate solutions to problems that are generally intractable in closed form. These processes of modelling, analysis, and computation are discussed with a focus on the behaviour of elastic-plastic bodies;these are materials which exhibit path-dependence and irreversibility in their behaviour. The resulting variational problem is an inequality that is not of standard elliptic or parabolic type. Properties of this formulation are reviewed, as are the conditions under which fully discrete approximations converge. A solution algorithm, motivated by the predictor-corrector algorithms that are common in elastoplastic problems, is presented and its convergence properties summarized. An important extension of the conventional theory is that of straingradient plasticity, in which gradients of the plastic strain appear in the formulation, and which includes a length scale not present in the conventional theory. Some recent results for strain-gradient plasticity are presented, and the work concludes with a brief description of current investigations.

关键词： Elastoplasticity variational inequalities finite elements algorithms convergence pre-dictor-corrector schemes strain-gradient plasticity

Facile one-step hydrothermal route to MSe/Mo_(3)Se_(4)(M:Zn,Mn,and Ni)-based electrode materials for ultralong-life hybrid supercapacitors

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Journal of Materials Science & Technology 2023年第25期156卷 230-240页

作者： b.N.Vamsi Krishna Obula reddy Ankinapalli Ayyaluri Ramakrishna reddy Jae Su Yu Department of Electronics and Information Convergence Engineering Institute for Wearable Convergence ElectronicsKyung Hee UniversityYongin-siGyeonggi-do 17104Republic of Korea

Transition metal selenides have attracted great interest in electrochemical energy storage applications because of their good electrochemical activity and conductivity ***,we reported the metal molybdenum selenide(M Se/Mo_(3)Se_(4)(M:Zn,Mn,and Ni))electrode materials on their morphological and electrochemical properties by varying the metal ions via a facile hydrothermal *** effects of the structural,morphological,and surface area properties of the prepared powder materials on their electrochemical performance were *** to the hierarchical porous and unique interconnected structure,the nickel molybdenum selenide nanosheet spheres(NMS NSSs)-based electrode material delivered an excellent specific capacity value of 252 mAh g^(-1) at a current density of 1 Ag^(-1).Moreover,the optimized NMS NSSs electrode exhibited outstanding cycling stability with a capacity retention of 80%and a corresponding coulombic efficiency of 99%after 80,000 ***,a pouch-type hybrid supercapacitor(HSC)device was assembled using NMS NSSs material as a positive electrode and activated carbon as a negative electrode in 1 M aqueous KOH ***,the assembled HSC device exhibited superior energy and power density values as well as magnificent cycling *** real-time practical applications,light-emitting diodes and a digital display were powered using two series-connected HSC ***,the obtained tremendous results strongly suggest that the NiSe/Mo_(3)Se_(4) NSSs-based materials could be a promising electrode for ultralong-life energy storage applications.

关键词： Nickel selenides Molybdenum selenides Nanosheet spheres Ultralong-life cycling stability

Review on Thyroid Disorders,Epidemiology and Treatment Methods

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Journal of Endocrinology Research 2019年第2期1卷 1-5页

作者： ramachandra reddy Pamuru Department of biochemistry Yogi Vemana UniversityKadapa516005A.P.India

Thyroid disorders are commonly overwhelming health conditions reported *** prevalence of thyroid disorders such as hypothyroidism and hyperthyroidism is increasing in developed and developing countries,including *** is due to change in traditional foods to besides low/insufficient iodine intake,smoking,ageing,genetic susceptibility,lifestyle,usage of new medicine,endocrine disrupting chemicals and immune status of an individual are the key determinants for thyroid *** review emphasizes the various disorders of the thyroid gland and,its epidemiology and treatment methods.

关键词： Thyroid gland Hypothyroidism Hyperthyroidism Iodine intake

CFD modeling of pressure drop and drag coefficient in fixed beds:Wall effects

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Particuology 2010年第1期8卷 37-43页

作者： Rupesh K.reddy Jyeshtharaj b.Joshi Department of Chemical Engineering Institute of Chemical TechnologyMatungaMumabiIndia

Simulations of fixed beds having column to particle diameter ratio （D/dp） of 3, 5 and 10 were performed in the creeping, transition and turbulent flow regimes, where Reynolds number （dpVLρL/μL） was varied from 0.1 to 10,000. The deviations from Ergun＇s equation due to the wall effects, which are important in D/dp 〈 15 beds were well explained by the CFD simulations. Thus, an increase in the pressure drop was observed due to the wall friction in the creeping flow, whereas, in turbulent regime a decrease in the pressure drop was observed due to the channeling near the wall. It was observed that, with an increase in the D/dp ratio, the effect of wall on drag coefficient decreases and drag coefficient nearly approaches to Ergun＇s equation. The predicted drag coefficient values were in agreement with the experimental results reported in the literature, in creeping flow regime, whereas in turbulent flow the difference was within 10-15%.

关键词： Computational fluid dynamics Fixed bed Wall effects Pressure drop Drag coefficient

Performance evaluation of near real-time condition monitoring in haul trucks

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International Journal of Mining Science and Technology 2020年第6期30卷 909-915页

作者： Hemanth reddy Alla Robert Hall Derek b.Apel University of Alberta Edmonton T6G 2H5Canada

Strategic maintenance plays a key role in ensuring high availability and utilization of the haul trucks,and as equipment began to grow more complex towards the end of the 20th century,there was a need for a proactive maintenance strategy,which led to the development of condition-based *** condition monitoring(RTCM)is the ability to perform condition monitoring in real-time and has the ability to alert maintenance and operations of abnormal *** alarms can be used as an indication leading to a problem,and if a suitable corrective action is initiated in time,it could result in significant savings of equipment downtime and repair *** study aims to compare some maintenance performance indicators prior to and after implementation of RTCM strategy at a mine site using some tests of statistical *** study also indicated the presence of seasonality in the data,and thus the data was deseasonalized and detrended prior to being subjected to the statistical ***,the results indicated that RTCM strategy has proven to be successful in improving the availability for some of the failure categories chosen in this study.

关键词： Haul trucks Real-time condition monitoring Performance indicators