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, Ravi,Manju Sharma,Sharma, Suman 한국유전학회 1994 Genes & Genomics Vol.16 No.4
Six Indian geographical populations of D. bipectinata were analysed electrophoretically for allozymic variation at nine loci as well as for ethanol tolerance potential. Allelic frequency changes at Adh, Odh and Est-5 loci correlated significantly with increase in latitude. On the basis of F_(ST) values, Adh, Odh, Mdh and α-Gpdh loci depicted modest amounts of genetic differentiation. Thus, the occurrence of significant genotypic as well as allelic frequency heterogeneity, genic differentiation and clinal variation at polymorphic loci suggest evidence of natural selection maintaining such genic differentiation in D. bipectinata populations from the Indian sub-continent. The Indian populations of D. bipectinata revealed genetic differentiation in term of ethanol indices such as LT_(50) hrs(72 to 96 hrs), adult ethanol threshold concentration(2.5 to 4.0'%), LC_(50) thanol concentration(2.7 to 4.2%). The parallel occurrence of latitudinal variation at Adh locus as well as ethanol tolerance in Indian geographical populations of D. bipectinata could be maintained by balancing natural selection varying spatially along the north south axis of the Indian sub-continent.
Ravi Kulandasamy,Airody Vasudeva Adhikari,James P. Stables 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.11
Five new series of 3,4-ethylenedioxythiophene derivatives carrying important pharamacophores, viz., amide, ester,ether and active secondary aryl moieties have been designed and synthesized through multistep reactions starting from thiodiglycolic ester and diethyl oxalate. They have been characterized by elemental and spectral data. All the target compounds have been screened for their anticonvulsant activity at three different models viz. maximal electroshock (MES), subcutaneous metrazole (scMET), and 6 Hz screen and evaluated for their neurotoxicity in rotorod model. Compound 6a emerged as lead with no neurotoxicity. All the five series of compounds are safe in the toxicity studies at the maximum dose of 300 mg/kg of body weight. Amongst the tested compounds, the ester pharmacophore with thioamide fragment has showed better activity than the other analogs.
Boundary Value Problems for differential Inclusions with Fractional Order
Ravi P. Agarwal,Mouffak Benchohra,Samira Hamani 장전수학회 2008 Advanced Studies in Contemporary Mathematics Vol.16 No.2
In this paper, we shall establish sucient conditions for the existence of so-lutions for a class of boundary value problem for fractional dierential inclusionsinvolving the Caputo fractional derivative. The both cases of convex and non-convex valued right hand sides are considered.
Ravi, Seenu,Zhang, Siqian,Lee, Yu-Ri,Kang, Kyoung-Ku,Kim, Ji-Man,Ahn, Ji-Whan,Ahn, Wha-Seung Elsevier 2018 Journal of industrial and engineering chemistry Vol.67 No.-
<P><B>Abstract</B></P> <P>Ethylenediaminetetraacetic acid (EDTA)-functionalized KIT-6 and KCC-1 mesoporous silicas were prepared via post-synthesis grafting and examined for their ability to promote the recovery of rare earth metal ions such as Nd<SUP>3+</SUP> from an aqueous medium. The obtained adsorption isotherms were fitted to the Langmuir model, which gave a maximum adsorption of Nd<SUP>3+</SUP> ions of 109.8 and 96.5mg/g for KIT-6-EDTA and KCC-1-EDTA, respectively, at 25°C and pH 6. The adsorption kinetic profile of KIT-6 was faster than KCC-1. KIT-6 was also proved to be more stable against desorption under acidic regeneration conditions.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ethylenediaminetetraacetic acid (EDTA) grafted KIT-6 and KCC-1 was prepared. </LI> <LI> KIT-6-EDTA showed high adsorption capacities for Nd<SUP>3+</SUP> ions in water. </LI> <LI> Adsorption equilibrium, isotherm, and kinetics were investigated. </LI> <LI> KIT-6-EDTA reused for 5 cycles without deterioration in adsorption capacities. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
On solutions of a generalized neutral logistic differential equation
Ravi P. Agarwal,J´ozef Bana´s,Reza Mollapourasl,T. Gnana Bhaskar 장전수학회 2010 Advanced Studies in Contemporary Mathematics Vol.20 No.2
We study a generalized neutral logistic differential equation with deviating argument. Using the classical Banach contraction principle on an equivalent nonlinear functional integral equation we establish the existence of a unique solution in a certain function space. A few examples along with a numerical solutions are presented.
Ravi Kumar H. S.,Vijay G Goni,Batra Y. K. 대한척추외과학회 2015 Asian Spine Journal Vol.9 No.6
Study Design: The study was conducted on patients who received autologous conditioned serum (ACS) as a line of treatment at the Orthopedics outpatient department of Post Graduate Institute of Medical Education and Research (PGIMER, Chandigarh) from January 2011 to June 2012. Of the 1,224 patients, 20 males or females were included in the study based on the inclusion and exclusion criteria. The institutional board of PGIMER approved the study before it was initiated. Purpose: To study the efficacy of ACS in the treatment of unilateral lumbar radiculopathy. Overview of Literature: Interleukin (IL)-1 appears to be of special importance among the cytokines identified in orthopedic diseases. ACS contains high concentrations of IL-1 receptor antagonist, antagonist to IL-1 in that is a biochemical ‘sensitizer’ of nerve roots in radiculopathy. Methods: We included 20 patients with unilateral lumbar radiculopathy after obtaining informed consent. We prepared ACS as described by Meijer et al. Under bi-planar fluoroscopic imaging in anterior-posterior and lateral views, ACS was administered via epidural perineural technique. Patients in both groups were evaluated by quadruple visual analogue scale, straight leg raising test, revised Oswestry disability index, and 12-Item Short Form of Health Survey before and after epidural injections at 3 weeks, 3 months, and 6 months. Results: There was a statistically significant change in all parameters from pre-injection to first, second, and third follow-up (p <0.001). Conclusions: ACS can modify the disease course in addition to reducing pain, disability and improving general health.
Ravi, Seenu,Puthiaraj, Pillaiyar,Park, Dong-Wha,Ahn, Wha-Seung The Royal Society of Chemistry 2018 New journal of chemistry Vol.42 No.15
<P>A highly porous quaterphenyl-containing covalent triazine polymer (QP-CTP) incorporated with iron oxide nanoparticles (Fe3O4@QP-CTP) was synthesized and applied as a catalyst for the cycloaddition of CO2 and epoxides under mild conditions. The synthesized materials were characterized using X-ray powder diffraction, N2 adsorption-desorption isotherm, X-ray photoelectron spectroscopy, transmission electron microscopy, and elemental analysis. The Fe3O4@QP-CTP composite in the presence of tetrabutylammonium bromide showed 95% conversion of epoxides with high selectivity to cyclic carbonates at 50 °C, 0.1 MPa CO2 in 12 h. The reaction kinetics was further improved upon increasing the temperature to 80 °C. The catalyst was easily recovered using a magnet, and its stability was confirmed using a recycle test, which showed that the catalyst could be re-used for a minimum of eight consecutive runs without a noticeable decline in catalytic activity. A plausible mechanistic pathway of the cycloaddition reaction over Fe3O4@QP-CTP was also proposed.</P>
A note on the Lefschetz fixed point theorem for admissible spaces
Ravi P. Agarwal,Donal O'Regan 대한수학회 2005 대한수학회보 Vol.42 No.2
The Lefschetz fixed point theorem is extended to compactcontinuous maps defined on an admissible subset of a Hausdorfftopological space.