Alvas Institute of Engineering and Technology

South Canara District, India

Alvas Institute of Engineering and Technology

South Canara District, India
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Chandraju S.,University of Mysore | Venkatesh R.,University of Mysore | Chidan Kumar C.S.,Alvas Institute of Engineering and Technology
Journal of Chemical and Pharmaceutical Research | Year: 2013

Sorghum husk is a lignocelluloses source that can be converted to reducing sugars. Sorghum husk was hydrolyzed using sulphuric acid (0.2N) at a temperature of 65-70°C. It was observed that the degradation has significant effect with respect to amount of husk taken and in turn sugar yield is around 40-50%, each of which is estimated by Bertrand's, Benedict's and Lane-Eyon methods.


Druva Kumar L.,Alvas Institute of Engineering and Technology | Alavalapati G.R.,Kyungpook National University
Proceedings of the 2016 2nd International Conference on Applied and Theoretical Computing and Communication Technology, iCATccT 2016 | Year: 2017

This paper put forth an effective and quick strategy for biometric validation using close infrared hand vein design. There are numerous methodologies for hand design validation, yet the time take for preparing and the computational strategy for nerve example is a noteworthy. The proposed adaptive threshold technique makes the possibility to verify and authenticate with 15 degree of movement of hand while capturing vein pattern for authentication and also comparison of proposed technique is compared with other algorithm and efficiency is mapped. The proposed work has a false acceptance rate 0.0001% of and false rejection rate of 0.1%. The results and analysis section proves that proposed technique is efficient than other approaches. © 2016 IEEE.


Chidan Kumar C.S.,Alvas Institute of Engineering and Technology | Mythily R.,University of Mysore | Chandraju S.,University of Mysore
Journal of Chemical and Pharmaceutical Research | Year: 2012

Paddy husk is a lignocelluloses source that can be converted to reducing sugars. Paddy husk was hydrolyzed using sulphuric acid (0.2N) at a temperature 65-70 °C. It was observed that the degradation has significant effects with respect to amount of husk taken and in turn sugar yield is around 40-50% each which is estimated by Bertrand's, Benedict's and Lane-Eynon methods.


Udaya,NMAM Institute of Technology | Fernandes P.,Alvas Institute Of Engineering And Technology
Materials Science Forum | Year: 2015

The paper illustrates Carbon nanotubes reinforced pure Al (CNT/Al) composites and fly ash reinforced pure Al (FA/Al) composites produced by ball-milling and sintering. Microstructures of the fabricated composite were examined and the mechanical properties of the composites were tested and analysed. It was indicated that the CNTs and fly ash were uniformly dispersed into the Al matrix as ball-milling time increased with increase in hardness. © (2015) Trans Tech Publications, Switzerland.


Satyanarayan,Alvas Institute Of Engineering And Technology | Prabhu K.N.,National Institute of Technology Karnataka
Materials Science Forum | Year: 2015

In the present work, the bond strength of Sn-0.7Cu, Sn-0.3Ag-0.7Cu, Sn-2.5Ag-0.5Cu and Sn-3Ag-0.5Cu lead free solders solidified on Cu substrates was experimentally determined. The bond shear test was used to assess the integrity of Sn–Cu and Sn–Ag–Cu lead-free solder alloy drops solidified on smooth and rough Cu substrate surfaces. The increase in the surface roughness of Cu substrates improved the wettability of solders. The wettability was not affected by the Ag content of solders. Solder bonds on smooth surfaces yielded higher shear strength compared to rough surfaces. Fractured surfaces revealed the occurrence of ductile mode of failure on smooth Cu surfaces and a transition ridge on rough Cu surfaces. Though rough Cu substrate improved the wettability of solder alloys, solder bonds were sheared at a lower force leading to decreased shear energy density compared to the smooth Cu surface. A smooth surface finish and the presence of minor amounts of Ag in the alloy improved the integrity of the solder joint. Smoother surface is preferable as it favors failure in the solder matrix. © (2015) Trans Tech Publications, Switzerland.


Bhat J.I.,Mangalore University | Shetty M.K.,Alvas Institute of Engineering and Technology
Journal of Chemical and Engineering Data | Year: 2010

The electrical conductance of sulfathiazole sodium in water and different volume fractions of water + dimethyl sulfoxide (DMSO) and water + ethanol in the temperature range of (283 to 313) K has been measured. Kraus-Bray and Shedlovsky models of conductivity were used for analyzing the conductance data. The limiting ionic conductance, limiting molar conductance, and association constant, Ka, have been determined. On the basis of the viscosity of the solvent, the Walden product and Stokes molecular radius were also determined. © 2010 American Chemical Society.


Chidan Kumar C.S.,Universiti Sains Malaysia | Chidan Kumar C.S.,Alvas Institute of Engineering and Technology | Loh W.-S.,Universiti Sains Malaysia | Ooi C.W.,Universiti Sains Malaysia | And 3 more authors.
Molecules | Year: 2013

Chalcone derivatives have attracted increasing attention due to their numerous pharmacological activities. Changes in their structures have displayed high degree of diversity that has proven to result in a broad spectrum of biological activities. The present study highlights the synthesis of some halogen substituted chalcones 3(a-i) containing the 5-chlorothiophene moiety, their X-ray crystal structures and the evaluation of possible biological activities such as antibacterial, antifungal and reducing power abilities. The results indicate the tested compounds show a varied range of inhibition values against all the tested microbial strains. Compound 3c with a p-fluoro substituent on the phenyl ring exhibits elevated antimicrobial activity, whereas the compounds 3e and 3f displayed the least antimicrobial activities. The compounds 3d, 3e, 3f and 3i showed good ferric and cupric reducing abilities, and the compounds 3b and 3c showed the weakest reducing power in the series. © 1996-2013 MDPI AG.


Chidan Kumar C.S.,Universiti Sains Malaysia | Chidan Kumar C.S.,Alvas Institute of Engineering and Technology | Loh W.-S.,Universiti Sains Malaysia | Ooi C.W.,Universiti Sains Malaysia | And 3 more authors.
Molecules | Year: 2013

A series of six novel heterocyclic chalcone analogues 4(a-f) has been synthesized by condensing 2-acetyl-5-chlorothiophene with benzaldehyde derivatives in methanol at room temperature using a catalytic amount of sodium hydroxide. The newly synthesized compounds are characterized by IR, mass spectra, elemental analysis and melting point. Subsequently; the structures of these compounds were determined using single crystal X-ray diffraction. All the synthesized compounds were screened for their antioxidant potential by employing various in vitro models such as DPPH free radical scavenging assay, ABTS radical scavenging assay, ferric reducing antioxidant power and cupric ion reducing antioxidant capacity. Results reflect the structural impact on the antioxidant ability of the compounds. The IC50 values illustrate the mild to good antioxidant activities of the reported compounds. Among them, 4f with a p-methoxy substituent was found to be more potent as antioxidant agent. © 1996-2013 MDPI AG.


Ramadevi P.,Jawaharlal Nehru Technological University | Ramadevi P.,KLE University | Sampathkumar D.,Jawaharlal Nehru Technological University | Sampathkumar D.,KLE University | And 2 more authors.
BioResources | Year: 2012

Environmentally beneficial composites can be made by replacing synthetic fibers with various types of cellulosic fibers. Fibers from pine wood, coir, sisal, abaca, coir, etc. are all good candidates. The most important factor in finding good fiber reinforcement in the composites is the strength of adhesion between matrix polymer and fiber. Due to the presence of hydroxyl groups and other polar groups in various constituents of abaca, the moisture absorption is high, which leads to poor wettability and weak interfacial bonding between fibers and the more hydrophobic matrices. Therefore, it is necessary to impart a hydrophobic nature to the fibers by suitable chemical treatments in order to develop composites with better mechanical properties. In the present work, the effect of alkali treatment on the moisture absorption tendency of single abaca fiber was investigated. The results shown that the alkali treated fiber absorbs less moisture than the untreated raw fiber.


Bhat J.I.,Mangalore University | Shetty M.K.,Alvas Institute of Engineering and Technology
Journal of Molecular Liquids | Year: 2011

The ion solvation behavior of sulfacetamide sodium in water and various volume fractions of ethanol (EtOH) in water in the range of 283 to 313 K, using electrical conductivity principle have been studied. The conductance data were analyzed according to Kraus-Bray and Shedlovsky models of conductivity. The limiting molar conductance λm o, association constant Ka, energy of activation of the rate process (E a), and related thermodynamic parameters have been determined. Using viscosity of the solvent, Walden product (λm oη0) and Stokes molecular radius have been determined. Standard thermodynamic parameters of association (ΔGa, ΔHa,) were calculated and discussed. The limiting molar conductance sharply decreased for the increased amount of ethanol suggesting the increased ion-solvent and solvent-solvent interactions. © 2011 Elsevier B.V.

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