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Vijayawada, India

K L University, officially the Koneru Lakshmaiah Education Foundation, is a deemed university located in the Vaddeswaram Guntur District of Andhra Pradesh, India. K L University consists of 11 academic departments and six schools, with a strong emphasis on scientific and technological research.Established in 1980, the college is located on a 100-acre site adjacent to Buckingham Canal, and is about 8 kilometres from Vijayawada in Krishna District and 20 km from Guntur City. The institution is recognized by the All India Council for Technical Education, New Delhi, has been accredited by the National Board of Accreditation, and is certified by ISO 9001 - 2000. It has been accredited by National Assessment and Accreditation Council with an A grade. Wikipedia.

Using B3LYP and B97D functionals of density functional theory (DFT), homochiral and heterochiral cyclic trimerization of imidazole based heterocyclic amino acids are studied in gas phase and solvent phase, i. e., Acetonitrile. Both the functionals show that formation of homochiral cyclic tripeptide is thermodynamically and kinetically favorable over its heterochiral counterpart in gas phase. The functional, B97D, decreases the height of reaction barriers significantly compared to those predicted by the functional B3LYP. The reaction pathways explored using PCM implicit solvent model show reduced kinetic favorability for formation of the homochiral cyclic tripeptide over its heterochiral counterpart. The results are substantiated by structural aspects. © 2016, Springer-Verlag Berlin Heidelberg. Source

Polu A.R.,Koneru Lakshmaiah College of Engineering | Kumar R.,Dr Hari Singh Gour University
Advanced Materials Letters | Year: 2013

Composite polymer electrolyte films consisting of polyethylene glycol (PEG), Mg(CH3COO)2 and Al2O3 particles have been prepared by solution casting technique. The X-ray diffraction patterns of PEG-Mg(CH3COO)2 with Al2O3 ceramic filler, indicates the decrease in the degree of crystallinity with increasing concentration of the filler. The role of ceramic phase is to reduce the melting temperature which is ascertained from the DSC. The effect of ceramic filler on the conductivity of the polymer electrolyte was studied. The maximum ionic conductivity has been observed for 10 wt% of Al2O3 at room temperature (303 K). The transference number data indicated the dominance of ion-type charge transport in these composite polymer electrolytes. Using this (PEG-Mg(CH3COO)2-Al2O3) (85-15-10) electrolyte, solid-state electrochemical cell was fabricated and their discharge profiles were studied under a constant load of 100 kO. Several cell profiles associated with this cell were evaluated and are reported.©2013 VBRI press. Source

Patel D.,Koneru Lakshmaiah College of Engineering
International Journal of Pharma and Bio Sciences | Year: 2011

Despite their enormous utility and diffusion, atmospheric pressure ionization mass spectrometry techniques are subjected to relevant drawbacks called matrix effects (ME). These effects could be summarized in matrix-dependent signal suppression or enhancement that could lead to erroneous quantitative results. The most important method parameters as well as linearity, precision, and accuracy could be modified due to interfering compounds present in the matrix. No validation methods could be accepted without a thorough evaluation of ME and possible strategies to minimize or to correct their influence should be addressed. Matrix effects result from co-eluting residual matrix components affecting the ionization efficiency of target analytes and can lead to erroneous results. Matrix effects, i.e. ion suppression or ion enhancement, are well known phenomena in liquid chromatography-mass spectrometry (LC-MS). They can be caused by compounds of various origins. Since matrix effects may exert a negative effect on important method performance parameters, they have to be tested for and evaluated during method development/validation. This can either be done by the method of postcolumn infusion or by comparison of signals from neat standards and blank sample extracts spiked with analyte. Wherever possible, matrix effects should be reduced or eliminated by the optimization of chromatographic conditions, improving sample clean-up and/or by changing the type of ionization employed. In the present article, we have concentrated on detailed description of matrix effects in a view of LC-MS/MS. Source

Mulaveesala R.,Indian Institute of Technology Ropar | Ghali V.S.,Koneru Lakshmaiah College of Engineering | Arora V.,Indian Institute of Technology Ropar
Electronics Letters | Year: 2013

The active thermal nondestructive testing and evaluation method is a rapidly growing testing procedure for a quick and remote inspection procedure for fibre-reinforced plastics. Conventional modulated lockin thermography significantly contributed to this field by allowing usage of low peak power controlled stimulations followed by phase based detail extraction procedures. But demand of repetitive experimentation required for depth scanning of the test object limits its applicability for realistic critical applications and demands multi-frequency low power stimulations for better resolution and sensitivity for subsurface defect detection. Frequency modulated thermal wave imaging and coded excitation thermal wave imaging methods permitting multi-frequency stimulations cater for these needs and facilitate depth scanning of the test object in a single experimentation cycle. Recently introduced three-dimensional pulse compression is an alternative to phase based analysis for these stimulations by providing enhanced defect detection even in noisy environmental and experimental conditions. Defect detection capability and sizing by these nonstationary thermal wave imaging methods are highlighted using the pulse compression approach. The present experimental study has been carried out on a carbon fibre reinforced plastic specimen with flat bottom holes. © The Institution of Engineering and Technology 2013. Source

Srinivasa Rao K.,Koneru Lakshmaiah College of Engineering
European Physical Journal D | Year: 2015

In this paper we have reported the theoretical calculation of the vibrational frequencies of various metallotetraphenylporphyrins and its cation radicals for 60 vibrational bands each using U(2) algebraic model Hamiltonian. Graphical abstract: [Figure not available: see fulltext.] © 2015 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg. Source

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