Kuvempu University is a public state university located in Shimoga, Karnataka, India. It was established in 1987 by the act of the Karnataka state legislature through an amendment No.28/1976 dated 29 January 1989 under the Karnataka State University Act 1976. The university offers undergraduate and graduate degree programs in wide range of disciplines. It occupies 230 acres of land. The university was recognized by the UGC in 1994 and is a member of the Association of Indian Universities .The university has its headquarters at Jnana Sahyadri Campus, Shimoga. Its campus is called Jnana Sahyadri, which means The Western Ghat section of knowledge. It has as university jurisdiction over malnad districts of Shimoga and Chikmagalur, through which the Sahyadri mountain ranges pass. It also covers districts of Davangere and Chitradurga but now the two places have their own universities, hence is limited to affiliating reseach centers just like anywhere else in India. The campus sprawls across an area of 230 acres. The campus inmates can find some admixture of wild animals and domestic animals. Nature was never so beautiful before like it is inside Jnana Sahyadri. Wikipedia.
Al-Kahtani A.A.,Albaydaa University |
Sherigara B.S.,Kuvempu University
Carbohydrate Polymers | Year: 2014
To reinforce the hydroxyethyl cellulose for using it in biomedical and pharmaceutical applications as a drug delivery systems, the grafting of acrylamide onto hydroxyethyl cellulose (AAm-g-HEC) was achieved by Ce(IV) induced free radical polymerization. The AAm-g-HEC was then blended with sodium alginate (NaAlg) to prepare pH-sensitive interpenetrating network (IPN) microspheres (MPs) by emulsion-crosslinking method using glutaraldehyde (GA) as a crosslinking agent. The produced MPs are almost spherical in nature with smooth surfaces. Diclofenac sodium (DS), an anti-inflammatory drug, was successfully encapsulated into the MPs. The % encapsulation efficiency was found to vary between 54 and 67. The MPs were characterized by DSC, SEM and FTIR spectroscopy. In vitro release studies were carried out in simulated gastric fluid of pH 1.2 for 2 h followed by simulated intestinal fluid of pH 7.4 at 37 C. The release data have been fitted to an empirical equation to investigate the diffusional exponent (n), which indicated that the release mechanism shifted from anomalous to the super Case-II transport. © 2014 Elsevier Ltd.
AL-Kahtani A.A.,Albaydaa University |
Sherigara B.S.,Kuvempu University
Colloids and Surfaces B: Biointerfaces | Year: 2014
The semi-interpenetrating networks (semi-IPNs) of acrylamide grafted sodium alginate (AAm-g-NaAlg) microspheres (MPs) were prepared by emulsion-crosslinking method using glutaraldehyde (GA) as a crosslinking agent. The grafting of acrylamide onto sodium alginate was prepared by free-radical graft polymerization using ceric ammonium nitrate (CAN) as initiator at three acrylamide concentrations with monomer to polymer ratio of 1:1, 2:1 and 3:1, respectively. The grafting efficiency was found to be 91%. The produced MPs are almost spherical in nature with smooth surfaces. Diclofenac sodium (DS), an anti-inflammatory drug was successfully encapsulated into the MPs. The encapsulation efficiency was found to vary between 83% and 95%. The MPs were characterized by differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The diffusion coefficient (D) was dependent upon the amount of crosslinking agent (GA) and amount of grafting ratio in the matrix. The rate of release was found to be dependent on the amount of GA, AAm:NaAlg grafting ratio and % drug loading in the MPs. The release data have been fitted to an empirical equation to investigate the diffusional exponent (n), which indicated that the release mechanism from MPs follows the super Case II transport. © 2013.
Sampath Kumar B.T.,Tumkur University |
Vinay Kumar D.,Kuvempu University
Journal of Informetrics | Year: 2013
Study investigates the availability, persistence and half life of URL citations cited in two Indian LIS journals articles published between 2002 and 2010. This study also investigates how researchers can resurrect lapsed URL citations cited in research articles, using Wayback machine. A total of 1290 URLs cited in 472 research articles published in Indian LIS journals spanning a period of 9 years (2002-2010) were extracted. Study found that only 18.91% (1290 out of 6820) of URLs cited in these journal articles. 39.84% of URL citations were not accessible and remaining 60.15% of URL citations were still accessible. The HTTP 404 error message-" page not found" was the overwhelming message encountered and represented 54.86% of all HTTP error messages. However 51.06% URLs were recovered from HTTP 404 error message. Study also noticed that the half-life of URL citations was increased from 6.33 years to 13.85 years after recovering missing URLs from Wayback machine. © 2012 Elsevier Ltd.
Reddy S.,Kuvempu University |
Kumara Swamy B.E.,Kuvempu University |
Jayadevappa H.,Sahyadri Science College
Electrochimica Acta | Year: 2012
In the present work, different shaped CuO nanoparticles were synthesized using cetyl trimethyl ammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) in a co-precipitation method. The CuO nanoparticles were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), infrared absorption spectroscopy (IR) and UV-visible absorption spectroscopy (UV-vis). The prepared CuO nanoparticles were used for the preparation of modified carbon-paste electrodes (MCPE) for the electrochemical detection of dopamine (DA) at pH 6.0. The MCPE prepared from flake-shaped CuO nanoparticles exhibited an enhanced current response for DA. Electrochemical parameters, such as the surface area of the electrode, the heterogeneous rate constant (k s) and the lower detection limit (5.5 × 10 -8 M), were calculated and compared with those of the MCPE prepared from rod-shaped CuO nanoparticles. The MCPE prepared from SDS/polyglycine/flake-shaped CuO nanoparticles exhibited a further improved current response for DA and a high selectivity (E AA - E DA = 0.28 V) for the simultaneous investigation of DA and ascorbic acid (AA) at pH 6.0. The modified carbon-paste electrochemical sensors were compared, and the MCPE prepared from SDS/polyglycine/flake-shaped CuO nanoparticles exhibited better performance than the MCPE prepared from CTAB/polyglycine/flake-shaped CuO nanoparticles. © 2011 Elsevier Ltd.
Nataraja S.E.,Kuvempu University |
Venkatesha T.V.,Kuvempu University |
Tandon H.C.,Sri Venkateswara College of Engineering
Corrosion Science | Year: 2012
The electronic parameters of tacrine were evaluated by quantum chemical method to assess its corrosion inhibition potential. Further, it was confirmed by chemical and electrochemical studies on steel in 1.0M HCl and 0.5M H 2SO 4. It was found that tacrine performed better than the quantum prediction which is attributed to the planarity of the molecule. Also, tacrine is found to be more efficient in 1.0M HCl than in 0.5M H 2SO 4, which according to potential of zero charge study, is due to acid anions Cl - and SO42- Tacrine pursued Langmuir adsorption isotherm. © 2012 Elsevier Ltd.
Subba Rao A.N.,Kuvempu University |
Venkatarangaiah V.T.,Kuvempu University
Environmental Science and Pollution Research | Year: 2014
Electrochemical oxidation is an effective wastewater treatment method. Metal oxide-coated substrates are commonly used as anodes in this process. This article compiles the developments in the fabrication, application, and performance of metal oxide anodes in wastewater treatment. It summarizes the preparative methods and mechanism of oxidation of organics on the metal oxide anodes. The discussion is focused on the application of SnO2, PbO2, IrO2, and RuO2 metal oxide anodes and their effectiveness in wastewater treatment process. © 2013 Springer-Verlag Berlin Heidelberg.
Kariyajjanavar P.,Kuvempu University |
Jogttappa N.,Kuvempu University |
Nayaka Y.A.,Kuvempu University
Journal of Hazardous Materials | Year: 2011
The indirect electrochemical degradation of industrial effluents has become an attractive method in recent years. This paper deals with the electrochemical degradation of Novacron Deep Red C-D (NDRCD) and Novacron Orange C-RN (NOCRN) reactive azo dyes from aqueous solution using graphite carbon electrodes. The results indicated that initial pH, current density and supporting electrolytes were played an important role in the degradation of dyes. Electrochemical behavior of reactive azo dyes has been studied with cyclic voltammetry in acidic medium using pencil graphite as working electrode. The potentials selected for the two dyes were in the range +1.0 to -0.4V and +0.5 to -0.2V, respectively. The CV, UV-Vis and chemical oxygen demand (COD) studies were selected to evaluate the degradation efficiency. The maximum colour removal efficiency of 99% and 97% and chemical oxygen demand (COD) removal efficiency of 88% and 82% could be achieved for CDRCD and COCRN, respectively at 7gL -1 of NaCl concentration. The LC-MS study revealed the degradation of both the dyes and confirmed that the azo groups and aromatic rings were destroyed. The results revealed the suitability of the present process for the effective degradation of dye effluents. © 2011 Elsevier B.V.
Vathsala K.,Kuvempu University |
Venkatesha T.V.,Kuvempu University
Applied Surface Science | Year: 2011
The Zn and Zn-ZrO2 composite coatings were produced by electrodeposition technique using sulphate bath. ZrO2 particles were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The ZrO2 particle size distribution in the plating bath and Zeta potential and the ZrO2 were measured using dynamic light scattering technique (DLS). The corrosion resistance properties of Zn and Zn-ZrO2 composite coatings were compared by examining the experimental data acquired through polarization, open circuit potential (OCP) and Tafel measurements. The corrosion environment was 3.5 wt% NaCl solution. The variation of amount of ZrO2 in the solution on their % wt inclusion in the composite and on composite microhardness was investigated. XRD patterns were recorded for Zn and Zn-ZrO2 coatings to compare their grain size. The SEM images of coatings before and after corrosion under chemical and electrochemical conditions were presented. The results were analyzed to establish the superiority of Zn-ZrO2 composite over Zn coating. © 2011 Elsevier B.V. All rights reserved.
Mahadevan G.D.,Kuvempu University |
Neelagund S.E.,Kuvempu University
Journal of Basic Microbiology | Year: 2014
The extracellular thermoalkaline lipase from Geobacillus sp. Iso5 was purified to homogeneity by ultrafiltration, 6% cross-linked agarose and Phenyl spehrose HIC column chromatography. The final purified lipase resulted in 8.7-fold with 6.2% yield. The relative molecular weight of the enzyme was determined to be a monomer of 47kDa by SDS-PAGE and MALDI-TOF MS/MS spectroscopy. The purified enzyme exhibit optimum activity at 70°C and pH 8.0. The enzyme retained above 90% activity at temperatures of 70°C and about 35% activity at 85°C for 2h. However, the stability of the enzyme decreased at the temperature over 90°C. The enzyme activity was promoted in the presence of Ca2+ and Mg2+ and strongly inhibited by HgCl2, PMSF, DTT, K+, Co2+, and Zn 2+. EDTA did not affect the enzyme activity. The secondary structure of purified lipase contains 36% α-helix and 64% β-sheet which was determined by Circular dichromism, FTIR, and Raman Spectroscopy. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Rajakumar N.,Kuvempu University |
Shivanna M.B.,Kuvempu University
Indian Journal of Natural Products and Resources | Year: 2010
An ethno-medico-botanical field survey was conducted from May 2006 to July 2007 to document the uses of medicinal plants by traditional herbal healers in Sagar taluk of Shimoga district, Karnataka State, India. The information about plant species and their local name, part used, mode of drug preparation, dosage and duration was collected from 22 herbal practitioners and knowledgeable elder people residing in 10 randomly selected villages using semi-structured and questionnaire based interviews. In the present study, a total of 48 plant species belonging to 44 genera and 31 families used by folk practitioners to treat various common to chronic human and veterinary ailments were documented. Traditional healers in the study villages have a fairly good knowledge about the medicinal values of locally available plants, discussed in this paper.