Cannanore, India
Cannanore, India

Kannur University was established in 1996 to provide development of higher education in Kasaragod, Kannur, and Wayanad districts of Kerala, India. It was established after the passing of Act No. 22 of 1996 of the Kerala Legislative Assembly. A university by the name of "Malabar University" had come into existence even earlier by the passing of an ordinance by the Governor of Kerala, on 9 November 1995. Kannur University was inaugurated on 2 March 1996 by the Hon. Chief Minister of Kerala. The objective of the Kannur University Act, 1996 was to establish in the state of Kerala a teaching, residential and affiliating university to provide for the development of higher education in Kasargod and Kannur revenue Districts and the Mananthavady Taluk of Wayanad District.Kannur University is a multi-campus university, at Kannur, Kasargod, Mananthavady, Payyannur, Thalassery, and Kanhangad. Wikipedia.

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Sadasivan C.,Kannur University
Biomedicine and Pharmacotherapy | Year: 2014

The chitosan microspheres formulated by emulsion cross-linking method were found to be smooth and spherical without aggregation. The particle size range was between 1 and 90 μm. The particle sizes were found to be influenced by the concentration of the chitosan gel. Tetanus toxoide (TT) vaccine was loaded by passive adsorption from an aqueous solution into the preformed chitosan microspheres cross-linked with glutaraldehyde. The loaded TT on to microspheres was estimated by ELISA method. The loading capacity was found to be 40% with microspheres prepared with 1% chitosan gel, 43% for 2% and 46% for the mixed batch of microspheres prepared from 1% and 2% chitosan gel. The loading efficiency was found to decrease with increase in the concentration of chitosan gel. The in vitro release of the antigenic TT into the phosphate buffer at 37 °C from different batch of microspheres was studied and release had a remarkable dependence on the size of micropsheres. The percentage release of TT from chitosan microspheres prepared from 1% chitosan gel was 2.7% in 120. days and that from 2% chitosan gel was only 2%. The mixed batch of microspheres could release 2.3% in 120. days. The antigen integrity was investigated by SDS-PAGE with brilliant blue staining. The SDS-PAGE analysis confirmed that the antigen integrity was not affected by passive adsorption of protein antigen to preformed chitosan microspheres. The study revealed that the cross-linked chitosan microspheres would be an interesting system for long-term delivery of macromolecules drugs. © 2013 Elsevier Masson SAS.


A modified approach for the synthesis of 3-substituted 2-aryl/heteroaryl imidazo[4,5-b]pyridines utilising palladium catalysed cross-coupling reactions under microwave enhanced conditions has been achieved. utilisation of (A- taphos) 2PdCl 2-catalysed cross-coupling reactions enables rapid derivatization of this (imidazo[4,5-b]pyridines) pharmaceutically relevant core. This catalytic system is compatible with a broad spectrum of arylboronic acids - electron rich, electron poor, and heteroarylboronic acids. © 2011 Elsevier Ltd. All rights reserved.


Enhancing the reactivity of the catalytic system by using palladium catalyst with sterically demanding and electron rich ligands attached to it has often been shown as an appropriate way of performing the copper-free Sonogashira reaction. In this paper, we report PdCl 2(PCy 3) 2 as an efficient catalyst for the copper and amine-free Sonogashira cross coupling reactions of 2-halo-3-alkyl imidazo[4,5-b]pyridines (I, Br, Cl) using tetrabutyl ammonium acetate as an activator under microwave enhanced conditions. © 2012 Elsevier Ltd. All rights reserved.


Santhosh K.P.,Kannur University | Priyanka B.,Kannur University
Physical Review C - Nuclear Physics | Year: 2013

An extensive study on the α-decay half-life for the isotopes of Z = 119 superheavy nuclei in the range 274 ≤ A ≤ 313 is performed within the Coulomb and Proximity Potential Model for Deformed Potential (CPPMDN) for deformed nuclei. We have also evaluated the decay properties by keeping the parents and daughter in spherical nuclear shape (without including the nuclear deformations), within the CPPM. The half-life calculations are also performed by using the Viola-Seborg semi-empirical (VSS) relation, very frequently used for α-decay studies, and it can be seen that our predictions agree well with the computed VSS values. Our intention to understand the mode of decay of the isotopes was fulfilled through the spontaneous fission (SF) half-life calculations and the comparison of the α half-lives with the SF half-lives. Thus, our study reveals that those isotopes of Z = 119 with A ≥ 309 and with A ≤ 275 do not survive fission, and thus, the α decay is restricted within the range of 276 ≤ A ≤ 308. Through our study, we have predicted six consistent α chains from 292-295119, five consistent α chains from 296119, four consistent α chains from 297119, and three consistent α chains from 298,299119, and we hope these findings will provide a new guide for future experiments. A theoretical study is performed here to understand the mode of decay of the isotopes of Z = 119, which helps to identify the mode of decay of about 40 isotopes within the range of 274 ≤ A ≤ 313. © 2013 American Physical Society.


Thomas L.,Indian National Institute for Interdisciplinary Science and Technology | Joseph A.,Kannur University | Gottumukkala L.D.,Indian National Institute for Interdisciplinary Science and Technology
Bioresource Technology | Year: 2014

Bioethanol and biobutanol hold great promise as alternative biofuels, especially for transport sector, because they can be produced from lignocellulosic agro-industrial residues. From techno-economic point of view, the bioprocess for biofuels production should involve minimal processing steps. Consolidated bioprocessing (CBP), which combines various processing steps such as pretreatment, hydrolysis and fermentation in a single bioreactor, could be of great relevance for the production of bioethanol and biobutanol or solvents (acetone, butanol, ethanol), employing clostridia. For CBP, Clostridium holds best promise because it possesses multi-enzyme system involving cellulosome and xylanosome, which comprise several enzymes such as cellulases and xylanases. The aim of this article was to review the recent developments on enzyme systems of clostridia, especially xylanase and cellulase with an effort to analyse the information available on molecular approaches for the improvement of strains with ultimate aim to improve the efficiencies of hydrolysis and fermentation. © 2014 Elsevier Ltd.


Santhosh K.P.,Kannur University | Priyanka B.,Kannur University
Nuclear Physics A | Year: 2015

The predictions on the mode of decay of the odd-even and odd-odd isotopes of heavy and superheavy nuclei with Z=99-129, in the range 228≤A≤336, have been done within the Coulomb and proximity potential model for deformed nuclei (CPPMDN). A comparison of our calculated alpha half lives with the values computed using other theoretical models shows good agreement with each other. An extensive study on the spontaneous fission half lives of all the isotopes under study has been performed to identify the long-lived isotopes in the mass region. The study reveals that the alpha decay half lives and the mode of decay of the isotopes with Z=109, 111, 113, 115 and 117, evaluated using our formalisms, agree well with the experimental observations. As our study on the odd-even and odd-odd isotopes of Z=99-129 predicts that, the isotopes 238,240-25499, 244,246-258101, 248,250,252-260,262103, 254,256,258-262,264105, 258,260,262-264,266107, 262,264,266-274109, 266,268-279111, 270-284,286113, 272-289,291115, 274-299117, 276-307119, 281-314121, 287-320,322123, 295-325125, 302-327127 and 309-329129 survive fission and have alpha decay channel as the prominent mode of decay, these nuclei could possibly be synthesized in the laboratory and this could be of great interest to the experimentalists. The behavior of these nuclei against the proton decay has also been studied to identify the probable proton emitters in this region of nuclei. © 2015 Elsevier B.V.


Santhosh K.P.,Kannur University | Priyanka B.,Kannur University
Physical Review C - Nuclear Physics | Year: 2014

An extensive investigation on the α decay properties of the isotopes of the superheavy nuclei with Z = 118, within the range 271≤A≤310, has been performed within the Coulomb and proximity potential model for deformed nuclei. The α decay half-lives of 118294 and its decay products, evaluated using our formalisms, are in good agreement with the experimental results. The calculated α half-lives were also found to be matching well with the values computed using the Viola-Seaborg systematic, the universal curve of Poenaru et al. [Phys. Rev. C 83, 014601 (2011)PRVCAN0556-281310.1103/PhysRevC. 83.014601;Phys. Rev. C 85, 034615 (2012)PRVCAN0556-281310.1103/PhysRevC.85. 034615] and the analytical formulas of Royer [J. Phys. G: Nucl. Part. Phys. 26, 1149 (2000)JPGPED0954-389910.1088/0954-3899/26/8/305]. So as to identify the mode of decay of these isotopes, the spontaneous-fission half-lives were also evaluated for all the isotopes under study and, our prediction of 3α chains from 118294 go hand in hand with the experimental observations. Our study also unveils that those isotopes of Z = 118 with A ≥ 301 and with A≤275 do not survive fission, thus restricting the α decay within the range of 276≤A≤300, and we hope that the theoretical prediction of 5α decay chains consistently from 118289-293 isotopes provides a new perspective to experimentalists. © 2014 American Physical Society.


Santhosh K.P.,Kannur University | Priyanka B.,Kannur University
Nuclear Physics A | Year: 2014

The feasibility for the alpha decay and the heavy particle decay from the even-even superheavy (SH) nuclei with Z=116-124 has been studied within the Coulomb and proximity potential model (CPPM). Our predicted half lives agree well with the values evaluated using the Universal formula for cluster decay (UNIV) of Poenaru et al., the Universal Decay Law (UDL) of Qi et al., and the Scaling Law of Horoi et al. The spontaneous fission half lives of the corresponding parents have also been evaluated using the semi-empirical formula of Santhosh et al. Within our fission model, we have studied the cluster formation probability for various clusters and the maximum cluster formation probability is found for the decay accompanying 298114. In the plots for log10(T1/2) against the neutron number of the daughter in the corresponding decay, the half life is found to be the minimum for the decay leading to 298114 (Z=114, N=184). Most of the predicted half lives are well within the present upper limit for measurements (T1/2<1030 s) and the computed alpha half lives for 290,292Lv agree well with the experimental data. © 2014 Elsevier B.V.


Santhosh K.P.,Kannur University | Bobby Jose V.,Kannur University
Nuclear Physics A | Year: 2014

The total fusion cross sections for the fusion of weakly bound 9Be on 27Al and 64Zn targets at near and above the barrier have been calculated using one dimensional barrier penetration model, taking scattering potential as the sum of Coulomb and proximity potential and the calculated values are compared with experimental data. For the purpose of comparison of the fusion of weakly bound projectiles and strongly bound projectiles, the total fusion cross sections for the reaction of tightly bound nucleus 16O on 64Zn have also been computed using a similar procedure. The calculated values of total fusion cross sections in all cases are compared with coupled channel calculations using the code CCFULL. The computed cross sections using Coulomb and proximity potential explain the fusion reactions well in both cases of weakly bound and strongly bound projectiles. Reduced reaction cross sections for the systems Be9+Al27, Be9+Zn64 and O16+Zn64 have also been described. © 2013 Elsevier B.V.


Santhosh K.P.,Kannur University | Priyanka B.,Kannur University
Physical Review C - Nuclear Physics | Year: 2014

The predictions on the α-decay chains of the isotopes of the superheavy nuclei with Z=120 in the range 272≤A≤319 have been done within the Coulomb and proximity potential model for deformed nuclei. A comparison of our calculated α half-lives with the values computed using the Viola-Seaborg [J. Inorg. Nucl. Chem. 28, 741 (1966)JINCAO0022-190210.1016/0022-1902(66)80412-8] systematic, the universal curve of Poenaru et al. [Phys. Rev. C 74, 014312 (2006)PRVCAN0556-281310.1103/PhysRevC.74.014312], and the analytical formulas of Royer [J. Phys. G: Nucl. Part. Phys. 26, 1149 (2000)JPGPED0954-389910.1088/0954-3899/26/8/305] show good agreement with each other. An extensive study on the spontaneous fission half-lives of all the isotopes under study has been performed to identify the mode of decay of these isotopes. The study reveals that the α-decay half-lives and the mode of decay of the isotopes of 120298,299, which are evaluated by using our formalisms, agree well with the experimental observations of Oganessian et al. [Phys. Rev. C 79, 024603 (2009)PRVCAN0556-281310.1103/PhysRevC.79.024603]. Our study on the isotopes of Z=120 predicts that the α decay restricts within the range 277≤A≤308 as those isotopes with A≤276 and those nuclei with A ≥ 309 do not survive fission. We have also forecasted the mode of decay of 120288-302 superheavy nuclei as six consistent α chains from the nuclei of 120288,289,291-295, seven consistent α chains from the nuclei of 120290, five consistent α chains from the nuclei of 120296,297, and three consistent α chains from the nuclei of 120300-302, which could be of great interest to the experimentalists. The one-proton and two-proton separation energy calculations on 120272-319 superheavy nuclei have revealed that the isotopes spanning the range 273≤A≤291 may be considered to be the probable proton emitters. © 2014 American Physical Society.

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