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- 저자 : Reddy, P.V.L. (검색결과 1,686 건)
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Synthesis and photophysical properties of π-bridged porphyrin-coumarin conjugates
( Reddy ),최명석 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Recently, development of new fluorescent dyes for biomolecular sensing have been attracted great interesting to many chemical and biological scientists due to its high sensitivity. We report the synthesis and photophysical properties of π-bridged porphyrin-coumarin conjugates via the acid-catalyzed cross-coupling condensation of coumarin aldehyde and dipyrromethane. The novel porphyrin conjugates were fully characterized by 1H-NMR, MALDI-TOF-MS, UV-vis absorption and fluorescence emission spectra. Analysis of the fluorescence spectra indicate that there is energy transferring between the coumarin substituents and the porphyrin core in the excited states of the molecules. We discuss the effect of π-bridge and orientation between porphyrin and coumarin moieties on energy transfer efficiency.
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Review on Cu2SnS3, Cu3SnS4, and Cu4SnS4 thin films and their photovoltaic performance
Vasudeva Reddy Minnam Reddy,Mohan Reddy Pallavolu,Phaneendra Reddy Guddeti,Sreedevi Gedi,Kishore Kumar Yarragudi Bathal Reddy,Babu Pejjai,김우경,Thulasi Ramakrishna Reddy Kotte,박진호 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.76 No.-
The rapid progress on the Cu–Sn–S (Cu2SnS3, Cu3SnS4, and Cu4SnS4) solar cells has opened a new avenueto generate the electrical energy at ultra-low-cost. Therefore, the progress in the deposition of Cu2SnS3,Cu3SnS4, and Cu4SnS4 thinfilms by various chemical and physical methods is reviewed comprehensively. This article briefly describes (i) the phase diagrams of Cu–Sn–S, (ii) the bulk properties of Cu2SnS3,Cu3SnS4, and Cu4SnS4, (iii) the effect of deposition conditions on the phase formation, (iv) the physicalproperties of Cu2SnS3, Cu3SnS4, and Cu4SnS4 thinfilms, and (v) the photovoltaic performance of Cu2SnS3,Cu3SnS4, and Cu4SnS4 solar cells.
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Reddy, P. Baswa,Reddy, T.J.,Reddy, Y.R. Asian Australasian Association of Animal Productio 2012 Animal Bioscience Vol.25 No.12
A growth and digestibility study was conducted using Osmanabadi goat male kids by feeding complete diets in the form of mash or expander extruded pellets containing different levels of red gram (Cajanus cajan) straw (RGS). Two iso-nitrogenous complete diets were prepared by incorporating RGS at 35% and 50% levels. Half the quantity of each complete mash feed was then converted into pellets through expander extruder processing. Thirty two kids of 4 to 5 months age were divided into four groups of eight each and were fed for 150 d with four experimental diets (T1: mash with 35% RGS, T2: mash with 50% RGS, T3: pellets with 35% RGS and T4: pellets with 50% RGS). Pelleting of complete diets significantly (p<0.001) increased the voluntary feed intake (671.45 vs 426.28 g/d) at both levels of RGS in the feeds. Average daily gain (ADG, g/d) also increased significantly (p<0.001) from 48.79 in kids fed mash diet to 71.29 in those fed with pelleted diets. Feed conversion efficiency (dry matter (DM) intake: weight gain) was comparable among all the treatment groups. Digestibility of nutrients was not affected by pelleting of the feeds whereas, increasing the level of inclusion of RGS in feeds from 35% to 50% decreased (p<0.05) the digestibility of DM and crude protein (CP) resulting in lower (p<0.001) metabolizable energy (ME) content (MJ/kg DM) in feeds with 50% RGS (7.93 vs 8.75). Daily intake (MJ/kg $BW^{-0.75}$) of ME decreased (p<0.05) in feeds containing 50% RGS while pelleting of feeds increased (p<0.05) the intake of DM, CP, digestible crude protein (DCP) and ME. It is inferred that expander extruder pelleting can efficiently utilize RGS up to 50% level in complete diets for growing goat kids.
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Reddy, B. Surendra,Reddy, A. Babul,Reddy, G. Ramachandra,Reddy, P. Raveendra Korean Chemical Society 2011 대한화학회지 Vol.55 No.6
The synthesis, as well as spectroscopic and biological studies of a novel class of [3-(4-substitutedphenylamino)-8-azabicyclo [3.2.1] oct-8yl]-phenyl-methanone derivatives are described. All the synthesized compounds were characterized by elemental analysis FTIR, $^1H$-NMR, $^{13}C$ NMR, and Mass spectral data. All the synthesized compounds were exhibit in vitro antibacterial activity.
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Sooty Mould Infection on Mulberry-Management
Reddy, C.Rajagopal,Reddy, P.Lakshmi,Misra, Sunil,Reddy, K.Dharma,Sujathamma, P. Korean Society of Sericultural Science 2003 International Journal of Industrial Entomology Vol.6 No.2
Black sooty mould fungus was observed on the upper side of the mulberry leaves caused by the Capnodium sp. This fungus develops with the utilization of the honeydew dropped by the whiteflies. Few selected insecticides like Monocrotophos, Chloropyriphos and Nuvan were tried to control the whitefly incidence and followed by the application of Maida (wheat flour paste) and Starch solution separately to control the incidence of the Capnodium on mulberry. It is found that a significant control of the whitefly incidence with the application of Nuvan (2 $m\ell$/L) and followed by Chloropyriphos (2 $m\ell$/L) and Monocrotophos (1.6 $m\ell$/L) and also a significant control of sooty mould infection were recorded with Starch and Maida application.
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Reddy, Chandragiri Venkata,Reddy, I. Neelakanta,Akkinepally, Bhargav,Harish, V.V.N.,Reddy, Kakarla Raghava,Jaesool, Shim Elsevier 2019 CERAMICS INTERNATIONAL Vol.45 No.12
<P><B>Abstract</B></P> <P>A template-free technique was used to prepare pure and Mn-doped ZrO<SUB>2</SUB> photocatalyst samples in this study. The effect of doping on the structural, optical, photocatalytic, and supercapacitor properties were investigated. X-ray diffraction analysis revealed that the prepared samples had a tetragonal crystal structure. The optical band gap was narrowed due to the incorporation of Mn ions. The photocatalytic activity of methyl orange organic dye degradation with the Mn-doped ZrO<SUB>2</SUB> sample was examined under visible-light irradiation. The doped sample showed 83% of dye degradation after 100 min of irradiation. Cyclic voltammetry was used to study the supercapacitor properties, and the doped samples exhibited capacitance seven times greater than that of the pure sample.</P>
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Montmorillonite Clay Catalyzed Three Component, One-Pot Synthesis of 5-Hydroxyindole Derivatives
Reddy, B.V. Subba,Reddy, P. Sivaramakrishna,Reddy, Y. Jayasudhan,Bhaskar, N.,Reddy, B. Chandra Obula Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.10
A highly efficient and environmentally benign protocol has been developed for the first time to produce a wide range of biologically active 5-hydroxyindole derivatives using montmorillonite KSF clay as a reusable solid acid catalyst. The use of recyclable clay makes this procedure quite simple, more convenient and cost-effective.
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Reddy, M. Harsha Vardhan,Reddy, T. Bramhananda,Reddy, B. Ravindranath,Suryakalavathi, M. The Korean Institute of Power Electronics 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.6
Conventional space vector pulse width modulation based asymmetrical dual inverter configuration produces high common mode voltage (CMV) variations. This CMV causes the flow of common mode current, which adversely affects the motor bearings and electromagnetic interference of nearby electronic systems. In this study, a simple and generalized carrier based pulse width modulation (PWM) technique is proposed for dual inverter configuration. This simple approach generates various continuous and discontinuous modulating signals based PWM algorithms. With the application of the discontinuous modulating signal based PWM algorithm to the asymmetrical dual inverter configuration, the CMV can be reduced with a slightly improved quality of output voltage. The performance of the continuous and discontinuous modulating signals based PWM algorithms is explored through both theoretical and experimental studies. Results show that the discontinuous modulating signal based PWM algorithm efficiently reduces the CMV and switching losses.
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