Synthesis, Characterization & Bioactivity Investigation of New Uranium & Thorium Complexes with Bidentate Schiff Bases as Ligands

Vinod Kumar and Smita Chaturvedi

Department of Chemistry, Agra College, Agra, India

Email: vinodkchem@gmail.com, smitachat15@gmail.com

The UO₂(VI) and Th(IV) complexes with 4-N-(metaphenoxybenzylidene) aminoantiipyrine and 2-N-(metaphenoxybenzylidene)furfurylamine have been synthesized and characterized by physicochemical data. Ligands behave as bidentate towards the metal ions. The integrated ligands and their metal complexes were subjected to antifungal studies. These studies demonstrated the enhanced activity of metal complexes with respect to Schiff bases.

Keywords: Schiff base, Metal Complexes, metaphenoxybenzaldehyde, Furfurylamine Aminoantipyrine, Antifungal studies.

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The MRF-Stimulated Quasi-Periodic Superlattice type characteristics in High Temperature Superconductor Bi2212

Pawan Kumar

Associate Prof., Department of Physics, A.S.(P.G.) College, Sikandrabad, India

The electric and magnetoconductivity in HTS Bi₂₂₁₂ have been experimentally observed under magneto-radio-frequency (MRF) excitations. The I-V characteristics, differential conductance dI/dV-V and second derivative d²I/dV²-V plots confirm the resonant tunnelling and the superlattice stimulations in HTS Bi₂₂₁₂  under  MRF perturbations.

Keywords:  HTS Bi_2212, MRF stimulated conductivity, Quasi-Periodic superlattice; resonant tunnelling, differential conductance.

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The Magneto-Resistivity Anisotropy in High Temperature Superconductors Bi₂₂₁₂ & Y₁₂₃

 Pawan Kumar

Associate Prof., Department of Physics, A.S.(P.G.) College, Sikandrabad, India

The Characteristic shape of resistivity transitions in HTS under magnetic field interaction is mysterious. The magnetoconductivity tensors σ_xx & σ_xy  in case of Y123 has been computed under radiofrequency excitations 1-6 MHz range at H=8000G [1]. The Bi₂₂₁₂ characteristics curves Hall potential V_H, Hall coefficient R_H and magnetodynamically stimulated density of electrical carriers N_H along with the temporal development of magnetopotential records had been observed to relate the magnetoresistivity [2,3]. The normal resistivity and conductivity of HTS Bi₂₂₁₂ between superconducting transition temperature below 100K to above 300K had been depicted. The localized density of states is observed to create anisopropy and the oscillatory behaviour of all these parameters even at room temperatures [4,5].

Keywords: Magnetoconductivity tensors, Hall geometry, Electrical carrier density.

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Crystal Structure of Fullerene C₆₀ & C₇₀ – A Theoretical Approach

Dr. Vaibhav Jain

Associate Professor, Physics Department, DAV (PG) College, Bulandshahr, UP, India.

Crystal structure of fullerene C₆₀ and C₇₀ with the help of Raman Spectra were studied by many scientists earlier. Particularly Raman Spectroscopy is well suited to detect small changes in structural morphology of carbon nano materials making it an indispensable tool for many materials with carbon nanostructures. Structure of fullerene C₆₀ and C₇₀ lead to interesting application possibilities. Derivatives of C₆₀ and C₇₀, such as buckyball clusters, nanotubes, megatubes, polymers, nano onions and fullerene rings have many interesting applications which made fullerenes as an active field of research.

Keywords: Fullerene, Raman Spectra, Buckminsterfullerene.

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Improving Child Security using GPS Enabled Identification Card

Dr. Vaibhav Jain

Physics Department, DAV (PG) College, Bulandshahr, UP, India.

The security of children in the country is a measure issue for the future of country. Children’s security can be improved by using a tracking system using Global Positioning System (GPS). In this paper we discussed a tracking system with the student Identity Card, which is GPS enabled with other tracking systems. ID card will be linked to parents mobile by which a parent can find their child’s location anytime from anywhere. Further, this concept can also be extended to implement for the security of employees working in remote areas and working in night.

Key words: Global Positioning System (GPS), ID Card.

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Green Route Synthesis of High Quality CdSe Quantum Dots

Anil Kumar Malik

Department of Physcs, Multanimal Modi College Modinagar, Uttar Pradesh, India.

e-mail: anilkmalik@gmail.com

Cadmium precursors with acetylacetonate, less toxic than Me₂Cd give one-step synthesis procedure for CdSe quantum dots (QDs). Powder X-ray diffraction shows hexagonal structure of QDs. TEM and HRTEM images of QDs reveal that they are almost mono disperse and size is of the order of  5 nm. It is observed that the precursor and reaction time affect size. The size of QDs increases with reaction time. The temporal growth was monitored by UV−Vis spectroscopy (up to 20 min).

Keywords: Cadmium selenide, X-ray diffraction, Temporal growth.

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Nanotechnology: The Multidisciplinary Technology – A Review

Dr. Anita Pawar

Associate Prof. & Head of Botany Department

N.R.E.C. College, Khurja, U.P. India.

Nanotechnology has been defined as relating to material, system and processes which operate at a scale of 100 nm or less. It has interdisciplinary approaches. Nanotechnology has potential to change the entire scenario of the present food industry and agriculture with the help of nano-based technology.  Environmental pollution is threat to the world’s environment, many nano based eco-friendly tools has developed which can reduce the pollution and clean-up the existing pollutant. Nano is also playing important role in the field of medical science and veterinary science.

Key words: Nanotechnology, Food industry, Nano-particles.

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Impact of Urban Air Pollution on Epidermal Traits of Amaranthus viridis Growing along the Road Side

Dr. Anita Pawar

Associate Prof. & Head of Botany Department

N.R.E.C. College, Khurja, U.P. India.

The present paper deals with the study of the impact of urban air pollution on epidermal traits. The light microscopic studies of Amaranthus viridis leaves showed marked alteration in the micromorphological parameters. Increase in the number of epidermal cells was recorded in the samples of polluted area on both upper & lower surface of leaf. But decline was noticed in stomatal frequency, dimensions of stomata and stomatal Index in stressed area leaf samples on both the surfaces. These parameters are useful as indicators of environmental stress or pollution.

Keywords: Epidermal traits, Amaranthus viridis, Stomatal frequency, Stomatal index.

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Auto Exhaust Pollution Induced Alteration in Leaf Morphology of Some Common Road Side Plants

Dr. Anita Pawar

Associate Prof. & Head of Botany Department

N.R.E.C. College, Khurja, U.P. India.

Present paper deals with the Auto exhaust induced changes in leaf morphology of some common road side plants. The study was conducted in city Ghaziabad, three sites were selected- HPA (Highly polluted area), MPA (Medium polluted area), FA (Fresh area). Five plants – Ricinus communis (Arandi), Amaranthus viridis (chauli), Cassia obtusifolia (chakunda), Withania somnifera (ashvagandha), Calotropis procera (madar). The parameters examined were leaf length, breadth and area. Decline was recorded in the parameters considered for the study of the leaf samples collected from polluted areas. These alterations can be considered as indicators of auto exhaust pollution.

Keywords: Auto exhaust, Leaf morphology, Highly polluted area (HPA), Medium polluted area MPA, Fresh area (FA).

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