Kaushik A.,Banasthali University |
Dalela B.,SKIT |
Rathore R.,University of Kota |
Vats V.S.,Government College |
And 4 more authors.
Journal of Alloys and Compounds | Year: 2013
A systematic investigation on the synthesis, characterization, optical and magnetic properties of Co doped ZnO nanocrystals have been reported. Nanocrystals of Zn1-xCoxO (where x = 0.05 and 0.10) were synthesized using the Sol-gel technique. Structural, optical and magnetic properties of the samples were investigated by X-ray diffraction (XRD), UV-VIS-NIR spectroscopy, Raman spectroscopy and SQUID magnetometer. Energy dispersive X-ray, Scanning electron microscopic, XRD and Raman measurements showed that the Co ions were successfully doped at the Zn site in the wurtzite type ZnO lattice. An appreciable blue shift in the absorption spectrum was observed, which indicates that the Co doping in ZnO leads to systematic increase in the band-gap with dopant concentration. Magnetization studies showed that the Co doped ZnO nanocrystals display room temperature ferromagnetism and the ferromagnetic ordering strengthens with the Co concentration. © 2013 Elsevier B.V. All rights reserved.
Kaushik A.,Banasthali University |
Dalela B.,Swami Keshwanand Institute of Technology |
Kumar S.,Mohan Lal Sukhadia University |
Alvi P.A.,Banasthali University |
And 2 more authors.
Journal of Alloys and Compounds | Year: 2013
The paper deals with the influence of Co doping on the structural, optical and magnetic properties of TiO2. XRD and Raman measurements confirmed single phase anatase structure of the Co doped TiO2 without having any impurity phases. The results are explained in terms of the broadening of peaks and small shift of Raman scattering modes, which is caused by the generation of defects such as vacancies and interstitials and owe their presence due to the microscopic structural disorder of oxygen lattice. 10% Co doped TiO2 exhibits room temperature ferromagnetic behavior with a 0.937 emu/g saturation magnetization and 65 Oe coercivity. Optical spectra have red shift with increasing Co in TiO2, due to sp-d exchange interactions. These interactions may be responsible for the ferromagnetic properties of the samples and the carriers are spin-polarized to mediate the ferromagnetic ordering. © 2012 Elsevier B.V. All rights reserved.
Agarwal S.,Mohan Lal Sukhadia University |
Gautam N.,P.A. College |
Agarwal K.,University of Rajasthan |
Gautam D.C.,University of Rajasthan
Journal of the Korean Chemical Society | Year: 2014
In the course of work on new pharmacologically active antimicrobial agents, we have reported the synthesis of a new class of structurally novel derivatives, incorporating two bioactive structures, a benzothiazole and thiazolidin-4-one, to yield a class of compounds having interesting antimicrobial properties. The antimicrobial properties of the synthesized compounds were investigated against bacteria (Staphylococcus aureus and Escherchia coli) and fungi (Candida albicans and Aspergillus niger) using serial plate dilution method. The structure of the synthesized compounds have been established by elemental analysis and spectroscopic data.
Khanam R.,Vidya Bhawan Rural Institute |
Khan S.,Vidya Bhawan Rural Institute |
Dashora R.,Mohan Lal Sukhadia University
Rasayan Journal of Chemistry | Year: 2014
Spectrophotometric determination of iron (III) has been done using p-Bromophenylazo-bis-acetoxime at 370nm, keeping the pH in the range 3.5-4.5. The molar absorptivity and Sandell's sensitivity values are 1,030 dm3 mol-1 cm-1 and 54.22 ng cm -2, respectively. The Beer's law is obeyed in the range (1 to 6) x10-5 M. © 2014 RASĀYAN. All rights reserved.
Sharma P.K.,University of Rajasthan |
Prasad A.S.,University of Rajasthan |
Samaria A.,University of Rajasthan |
Dhawan M.S.,University of Rajasthan |
And 3 more authors.
AIP Conference Proceedings | Year: 2011
Series of nanocrystalline Cu1-xZnxFe 2O4 (x=0.2, 0.4, 0.6 and 0.8) spinel ferrites have been synthesized using advanced sol-gel method. The XRD measurements confirm the formation of cubic spinel structure in single phase for all the samples and the average particle sizes are 14-18 nm. In this paper the dc magnetization study for one sample Cu0.4Zn0.6Fe2O4 is reported. The nanocrystalline sample is superparamagnetic above the blocking temperature of 180 K. The reduction in saturation magnetization is attributed to disordered magnetic moments at surface around the core of nanoparticles. © 2011 American Institute of Physics.
Kumar N.,Mohan Lal Sukhadia University |
Khandelwalal R.K.,Manikya Lal Verma Government College |
Meena P.L.,Mohan Lal Sukhadia University |
Meenak.s.,Manikya Lal Verma Government College
Asian Journal of Chemistry | Year: 2012
Eco-friendly tires really live up to their name according to the independent tire retail giant, it depends on the tire. Most green tires claim to increase fuel mileage, helping to decrease a consumer's carbon footprint. As fuel economy regulations tighten and consumer demand for green transportation increases, tire manufacturers worldwide are adding precipitated silica to tread formulations to improve fuel efficiency, eliminate greenhouse gas emissions and enhance tire performance and handling. Reducing rolling resistance, or the amount of energy spent to move a vehicle, is an increasingly important solution to decreasing fuel consumption. In fact, tires are responsible for 20 to 30 % of a vehicle's fuel use. Rheology is principally concerned with extending the classical disciplines of elasticity and newtonian fluid mechanics to materials whose mechanical behaviour cannot be described with the classical theories. It is also concerned with establishing predictions for mechanical behaviour based on the micro- or nanostructure of the material, e.g. the molecular size and architecture of polymers in solution or the particle size distribution in a solid suspension. Materials flow when subjected to a stress that is a force per area. There are different sorts of stress (e.g. shear, torsional, etc.) and materials can respond in various ways. Thus much of theoretical rheology is concerned with the forces associated and external applied loads and stresses and the resulting internal strains. The object of this study was to investigate the MIN TQ. (lb-in), MAX TQ. (lb-in), Final TQ. (Ilb-in) of a tyre tread cap compound.
Chittora R.,Mohan Lal Sukhadia University |
Jain A.,Mohan Lal Sukhadia University |
Suhalka P.,Mohan Lal Sukhadia University |
Sharma C.,Mohan Lal Sukhadia University |
And 2 more authors.
Sleep and Biological Rhythms | Year: 2015
Sleep is one of the great unsolved mysteries of biology. It is an important physiological process responsible for the physical, mental and emotional health of a living being. A good sleep is one of the most satisfying human experiences with a role to play in maintaining a good mood and cognitive acuity as well as in promoting physiologic balance and resilience. Chronic sleep deprivation can cause significant and cumulative physiological, neurobehavioral and neurocognitive deficits. Reduced sleep durations are associated with impaired functionality of the brain, thus slowly increase the vulnerability to neuropathology. © 2015 Japanese Society of Sleep Research.
Patel R.H.,Mohan Lal Sukhadia University |
Hiran B.L.,Mohan Lal Sukhadia University
E-Journal of Chemistry | Year: 2011
The ligand, 2-(2-furanylmethylaminocarbonyl)benzoic acid (FMBA) and it's transition metal complexes have been synthesized and characterized by elemental analysis, spectral studies, magnetic moments and thermal studies. The antifungal activity of all the samples was monitored against common fungi.
Ahuja M.,Mohan Lal Sukhadia University
Asian Journal of Chemistry | Year: 2014
1-Acetyl-5-aryl-3-(substituted thienyl)-4,5-dihydropyrazoles and their manganese complexes have been synthesized and characterized on the basis of elemental analysis, magnetic susceptibility, molar conductance, molecular weight determination and spectroscopic data. The IR data indicated that the coordination of the ligands to the manganese (II) ion was through the azomethine nitrogen and carbonyl oxygen. The micro analytical, electronic spectral assignments and magnetic moment suggested an octahedral geometry around the metal ion with 1:2 metal ligand stoichiometry. The complexes exhibited in vitro microbiocidal activity in comparison to ligands. © 2014, Chemical Publishing Co. All rights reserved.
Prasad A.,Mohan Lal Sukhadia University |
Veerwal B.,Mohan Lal Sukhadia University
International Journal of Pharma and Bio Sciences | Year: 2012
Diseases transmitted by mosquitoes have become one of the important issues regarding public health. Malaria still kills million of people in developing countries like Africa and Asia. However, development of resistance towards insecticides has made the standard approach for vector control unsustainable and researches have turned towards finding environmentally safe ways to kill the vectors of malaria. To achieve this goal biological control agents such as Entomopathogenic fungus Beauveria bassiana (Balsamo) Vuillemin are being considered as a favourable eco-safe agent for vector control of malaria. In the present investigation, different developmental stages of Anopheline mosquitoes were treated with four different concentrations i.e.1.5, 2.0, 2.5 and 3.5 ml of 6.4×1011conidia/ ml of Beauveria bassiana (Balsamo) Vuillemin. Percent mortality at different stages revealed positive co-relation with concentration, although 2nd instar was highly susceptible stage.LC50 for 2nd instar was minimum 0.907 percent followed by 1.265, 1.196 and 2.727 for 1st, 3rd and 4th instars respectively. Various morphological abnormalities and fungal sporulations were observed in majority of treated stages whereas control stages had no sporulations. Hence, the fungal bio pesticide Beauveria bassiana(Balsamo)Vuilemin could be a potential bio control agent for mosquito control.