Showing papers in "Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy in 2012"

TL;DR: Bacteria-mediated ZnO NPs were synthesized and proved to be a good novel antimicrobial material for the first time in this study.

TL;DR: The present work reports the green synthesis of gold nanoparticles using the aqueous extract of fenugreek (Trigonella foenum-graecum) as reducing and protecting agent and the catalytic activity is found to be size-dependent, the smaller nanoparticles showing faster activity.

TL;DR: The obtained results clearly suggest that silver nanoparticles may have important applications in controlling various plant diseases caused by fungi.

TL;DR: This is the first report on antimicrobial activity of fungus-mediated synthesized TiO(2) NPs, which was proved to be a good novel antibacterial material.

TL;DR: Controlled growth of silver nanoparticles was formed in 4h at room temperature (25°C) and 60°C and the average particle size was about 35±5 nm and it is consistent with particle size obtained by XRD Scherer equation.

TL;DR: The biologically synthesized gold nanoparticles were found to be effective against bacterial pathogens and photoluminescent and the reduction has been carried out by hydroxyl groups present in the diterpenoids of the brown seaweed.

TL;DR: A facile and efficient synthesis of copper oxide nanoparticles was carried out with controlled surface properties via green chemistry approach and is a novel, cheap, and convenient technique suitable for large scale commercial production and health related applications of CuO nanoparticles.

TL;DR: The colloidal solution of silver nanoparticles were found to exhibit high antibacterial activity against three different strains of bacteria Escherichia coli (Gram negative), Corney bacterium (gram positive), Bacillus substilus (spore forming).

TL;DR: The results from Langmuir isotherm indicated that the capacity of MNLTW for the adsorption of cationic dyes was higher than that for anionic dyes.

TL;DR: Progressive heat treatment was applied to palygorskite, and the changes of the position and intensity of its infrared vibrations, particularly those in the low wavenumber region, were monitored by use of Fourier transform infrared spectroscopy.

TL;DR: The biosynthesis of rutile TiO(2) nanoparticles (TiO( 2) NPs) was achieved by a novel, biodegradable and convenient procedure using fruit peel Annona squamosa aqueous extract using agricultural waste.

TL;DR: The present process is an excellent candidate for the synthesis of silver nanoparticles that is simple, easy to perform, pollutant free and inexpensive.

TL;DR: An eco-friendly method for the synthesis of spherical gold nanoparticles using aqueous extract of Macrotyloma uniflorum is described, which indicates the presence of different functional groups present in the bio-molecule capping the nanoparticles.

TL;DR: Three simple, specific, accurate and precise spectrophotometric methods manipulating ratio spectra are developed for simultaneous determination of omeprazole, tinidazole and clarithromycin in tablets and accuracy, precision, repeatability and robustness are found to be within the acceptable limits.

TL;DR: The results clearly indicate the efficiency of adsorbents as a low cost adsorbent for treatment of wastewater containing CR.

TL;DR: An in situ green biogenic synthesis of gold nanoparticles using aqueous extracts of Terminalia chebula as reducing and stabilizing agent is reported, showing better activity towards gram positive S. aureus compared to gram negative E. coli using standard well diffusion method.

TL;DR: Stability of the molecule arising from hyper conjugative interactions, charge delocalization has been analyzed using natural bond orbital (NBO) analysis and linear polarizability and the first order hyperpolarizability values of the investigated molecule have been computed using DFT quantum mechanical calculations.

TL;DR: The FTIR spectra of dried Pd nanoparticles, native and treated dried leaf powder have been analyzed to find out the biomolecule responsible for the reduction of Pd(2+) and capping of the palladium nanoparticles.

TL;DR: The calculated HOMO and LUMO energies show that charge transfer occurs within molecule and the scaled B3LYP/6-311++G(d,p) results show the best agreement with the experimental values over the other methods.

TL;DR: The addition of sugar molecules increased the conversion efficiency slightly with the carotenoid dye of K. japonica, while there was no considerable change with the anthocyanin of R. chinensis.

TL;DR: In this work, samples in form of bulk ones and thin films were obtained using the sol-gel method and the positions of TiO bond vibrations were ascribed basing on the IR spectra of the pure anatase and rutile.

TL;DR: Experimental results prove that the minor groove binding must be predominant in the interaction of levetiracetam with DNA and the drug induces detectable changes in the CD spectrum of CT-DNA as well as changes in its viscosity.

TL;DR: An optimum doping level of the transition metals for enhanced PL properties are found through optical study.

TL;DR: Cypress is an evergreen plant and its leaves are easily available in all four seasons, it can be used in the synthesis of gold nanoparticles instead of chemical methods and other biosynthesis approaches, and is cost-effective and environmentally friendly.

TL;DR: It is demonstrated that the instrument operating with 1064 nm excitation has potential for expanding the number and types of samples that can be measured by miniaturized Raman spectroscopy without interfering fluorescence background emission.

TL;DR: A green rapid biogenic synthesis of silver nanoparticles (Ag NPs) using Terminalia chebula (T.Chebula) aqueous extract showed good antimicrobial activity towards both Gram-positive bacteria and Gram-negative bacteria and Industrially it may be a smart option for the preparation ofsilver nanoparticles.

TL;DR: Luminescence spectra of these glasses exhibit the characteristic emission of Eu(3+) ion with an intense and most prominent red emission attributed to (5)D(0)→(7)F(2) transition.

TL;DR: In this article, it has been shown that a mononuclear nickel-II-Schiff base complex exhibits greater binding affinity for bovine serum albumin (BSA) than that of its human counterpart (HSA).

TL;DR: The solid phase FTIR and FT-Raman spectra of 4-butyl benzoic acid have been recorded and the structure of the molecule was optimized and the structural characteristics were determined by density functional theory (DFT) using B3LYP method with 6-311++G(d,p) as basis set.

TL;DR: The approach of plant-mediated synthesis appears to be cost efficient, eco-friendly and easy methods for synthesis of silver nanoparticles using aqueous extract of fresh leaves of Prosopis juliflora.