Kum. Akhila V.R., IIIB.Sc Geology (2010) student of the University College has secured first rank in the National Level Entrance Examination conducted by the Indian School of Mines, Dhanbad for admissions to the M.Sc/M.Tech admissions 2010-11.
http://www.ismdhanbad.ac.in/admissions/ISM_Entrance/RESULT_GEOL.xls
The IQAC, University College congratulates Kum. Akhila V.R. for this wonderful acheivement.
Sunday, June 06, 2010
Wednesday, June 02, 2010
MICROPROPAGATION OF A HIGHLY IMPORTANT MEDICINAL PLANT
Poster presentation by research team from the Dept. of Botany
Nikhila.G.S., Bannita Kumari and T.S.Swapna
Department of Botany University College, Thiruvananthapuram, Kerala
Abstract
Gymnema sylvestre belongs to the family Asclepiadaceae and the plant is considered to be a good source of a large number of bioactive substances. It is a vulnerable medicinal plant species and is a slow growing, perennial woody climber found in India. Gymnema sylvestre has a reputation as a traditional remedy to control diabetes mellitus. A number of Sarponins such as Gymnemic acid, Deacyl gymnemic acid, gymnemagenin, gymnestrogenin have been purified from Gymnema sylvestre. The leaf extract from this plant is used as stimulant, laxative, diuretic, antisweetner, antibacterial, antiviral and anti-inflamatory activities. Commercial exploration of this plant for production and conventional propagation is hampered due to its poor seed viability, low rate of germination and poor rooting ability of vegetative cuttings. Micropropagation is a useful method for multiplication of this plant which requires conservation. Using tissue culture secondary metabolites such as gymnemic acid, gymnimagenin etc can be produced in large scale. In the present work different explants (axillary node, shoot tip, cotyledonary node, leaf petiole, root and internode segments) were used for multiplication of Gymnema in basic MS medium. Various concentrations of cytokinins (BA and Kinetin) auxins (IAA, IBA, NAA, 2,4-D) were tried for somatic embryogenesis, multiple shoot and root induction. Of these combinations IBA & BAP and 2,4 –D & BAP were found to be more suitable for callusing and regeneration.
Key words- Gymnema, micropropagation, medicinal plant, somatic embryogenesis, multiple shooting
Nikhila.G.S., Bannita Kumari and T.S.Swapna
Department of Botany University College, Thiruvananthapuram, Kerala
Abstract
Gymnema sylvestre belongs to the family Asclepiadaceae and the plant is considered to be a good source of a large number of bioactive substances. It is a vulnerable medicinal plant species and is a slow growing, perennial woody climber found in India. Gymnema sylvestre has a reputation as a traditional remedy to control diabetes mellitus. A number of Sarponins such as Gymnemic acid, Deacyl gymnemic acid, gymnemagenin, gymnestrogenin have been purified from Gymnema sylvestre. The leaf extract from this plant is used as stimulant, laxative, diuretic, antisweetner, antibacterial, antiviral and anti-inflamatory activities. Commercial exploration of this plant for production and conventional propagation is hampered due to its poor seed viability, low rate of germination and poor rooting ability of vegetative cuttings. Micropropagation is a useful method for multiplication of this plant which requires conservation. Using tissue culture secondary metabolites such as gymnemic acid, gymnimagenin etc can be produced in large scale. In the present work different explants (axillary node, shoot tip, cotyledonary node, leaf petiole, root and internode segments) were used for multiplication of Gymnema in basic MS medium. Various concentrations of cytokinins (BA and Kinetin) auxins (IAA, IBA, NAA, 2,4-D) were tried for somatic embryogenesis, multiple shoot and root induction. Of these combinations IBA & BAP and 2,4 –D & BAP were found to be more suitable for callusing and regeneration.
Key words- Gymnema, micropropagation, medicinal plant, somatic embryogenesis, multiple shooting
Friday, May 28, 2010
What's New
Synthesis, physicochemical, antimicrobial, and 3D molecular modeling studies of oxomolybdenym(V) and dioxomolybdenum(VI) complexes with a Schiff base isonicotinoyl(5-bromo-2-hydroxybenzylidene)hydrazide
M. L. Harikumaran Nair and D. Thankamani
(1) Department of Chemistry, University College, Thiruvananthapuram, 695034, India
(2010) Russian Journal of Co ordination Chemistry, Vol. 36, No. 4, pp 259-268.Received: 30 June 2009 Published online: 1 May 2010
Abstract
Synthesis of some new oxomolybdenum(V) and dioxomolybdenum(VI) complexes with a Schiff base isonicotinioyl(5-bromo-2-hydroxybenzylidene)hydrazide (L) derived from 5-bromosalicylaldehyde and isonicotinoylhydrazide are reported. The complexes have been characterized by elemental analyses, molar conductance, magnetic susceptibility data, IR, UV-Vis, EPR, 1H NMR, and FAB mass spectral studies. The physicochemical studies and spectral data indicate that L acts as a monovalent tridentate chelating agent. The FAB mass and X-band EPR spectra indicate that the pentavalent Mo in the complex is monomeric in nature. The X-ray diffraction studies of the complex [MoO(L)Cl2] (I) correspond to the orthorhombic crystal lattice with the unit cell dimensions a = 16.11, b = 12.20, and c = 7.5 Å. The electrochemical behavior of the complex was investigated by cyclic voltammetry. All the complexes are found to be neutral with the distorted octahedral geometry. The thermal properties of the complex I were investigated by thermogravimetric techniques. The ligand L and the complexes I and [MoO2(L)Cl] (II) were screened for their in vitro antimicrobial activity. The complexes exhibited higher activity than L. The 3D molecular modeling and analysis for bond length and bond angles have also been carried out for complex I.
http://www.springerlink.com/content/104986/?p=ef9c4795dda949779b7e9069e8f6edec&pi=0
Synthesis, physicochemical, antimicrobial, and 3D molecular modeling studies of oxomolybdenym(V) and dioxomolybdenum(VI) complexes with a Schiff base isonicotinoyl(5-bromo-2-hydroxybenzylidene)hydrazide
M. L. Harikumaran Nair and D. Thankamani
(1) Department of Chemistry, University College, Thiruvananthapuram, 695034, India
(2010) Russian Journal of Co ordination Chemistry, Vol. 36, No. 4, pp 259-268.Received: 30 June 2009 Published online: 1 May 2010
Abstract
Synthesis of some new oxomolybdenum(V) and dioxomolybdenum(VI) complexes with a Schiff base isonicotinioyl(5-bromo-2-hydroxybenzylidene)hydrazide (L) derived from 5-bromosalicylaldehyde and isonicotinoylhydrazide are reported. The complexes have been characterized by elemental analyses, molar conductance, magnetic susceptibility data, IR, UV-Vis, EPR, 1H NMR, and FAB mass spectral studies. The physicochemical studies and spectral data indicate that L acts as a monovalent tridentate chelating agent. The FAB mass and X-band EPR spectra indicate that the pentavalent Mo in the complex is monomeric in nature. The X-ray diffraction studies of the complex [MoO(L)Cl2] (I) correspond to the orthorhombic crystal lattice with the unit cell dimensions a = 16.11, b = 12.20, and c = 7.5 Å. The electrochemical behavior of the complex was investigated by cyclic voltammetry. All the complexes are found to be neutral with the distorted octahedral geometry. The thermal properties of the complex I were investigated by thermogravimetric techniques. The ligand L and the complexes I and [MoO2(L)Cl] (II) were screened for their in vitro antimicrobial activity. The complexes exhibited higher activity than L. The 3D molecular modeling and analysis for bond length and bond angles have also been carried out for complex I.
http://www.springerlink.com/content/104986/?p=ef9c4795dda949779b7e9069e8f6edec&pi=0
Thursday, May 27, 2010
Echo
Welcome to the first blog post of 'Echo', the knowledge dissemination portal of the H.H. Maharaja's University College, Trivandrum, one of the oldest educational institutions of the country. The blog aims to bring to public domain the key publications by the faculty and students of the college. Please feel free to post your comments and suggestions about this venture. Echo will be heard soon.
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