Showing papers in "Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy in 2014"

TL;DR: Copper oxide nanoparticles synthesized by treating 5 mM cupric sulphate with Carica papaya leaves extract effectively degrade the Coomassie brilliant blue R-250 dye beneath the sunlight.

TL;DR: The colloidal solution of silver nanoparticles were found to exhibit antibacterial activity against Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumonia and, Enterococcus faecalis.

TL;DR: A new green method for the synthesis of silver and gold nanoparticles using the Kashayam, Guggulutiktham, an ayurvedic medicine is reported, which is nontoxic and environmentally benign.

TL;DR: Copper oxide nanoparticles showed efficient antibacterial and antifungal effect against Escherichia coli, Pseudomonas fluorescens and Candida albicans and confirmed that copper oxide nanoparticle have cytotoxicity activity.

TL;DR: Kinetics for the degradation of MG using these Fe NPs fitted well to the pseudo first-order reaction kinetics model with more than 20 kJ/mol activation energy, suggesting a chemically diffusion-controlled reaction.

TL;DR: Results indicate that charge trapping states due to the doping were the decisive factor rather than the average particle size and energy gap in the degradation of methyl orange under UV irradiation.

TL;DR: Synthesized silver nanoparticles exhibited significant antimicrobial activity against human bacterial pathogens viz., Klebsiella pneumoniae, Bacillus subtilis, Pseudomonas aeruginosa and Salmonella paratyphi.

TL;DR: Iron-based nanoparticles synthesized using oolong tea extracts demonstrated that kinetics fitted well to the pseudo first-order reaction by removing 75.5% of MG, indicating that OT-FeNP has the potential to serve as a green nanomaterial for environmental remediation.

TL;DR: The FTIR result showed that extract containing protein might be responsible for the formation of the nanoparticles and may play an important role in the stabilization of the formed nanoparticles.

TL;DR: Silver nanoparticles showed remarkable cytotoxicity activity against KB cell line with evidence of high therapeutic index value are the results are discussed.

TL;DR: The present study aimed to experimental design optimization applied to removal of malachite green from aqueous solution by ultrasound-assisted removal onto the gold nanoparticles loaded on activated carbon (Au-NP-AC), showing the suitability and applicability of the Langmuir model.

TL;DR: Pure titanium di-oxide nanoparticles were synthesized by sol-gel technique at room temperature with appropriate reactants by tetraisopropyl orthotitanate and 2-propanol as common starting materials and the product was annealed at 450 °C for 4 h.

TL;DR: Highly stable, spherical copper oxide nanoparticles were synthesized by using 50% concentration of Tabernaemontana leaf extract by an eco-friendly method and were found to be 48±4nm in size.

TL;DR: The green synthesis of silver nanoparticles (Ag NPs) is reported using Tephrosia purpurea leaf extract and the synthesized Ag NPs are found to be nearly spherical ones with size approximately ∼20 nm.

TL;DR: The results suggest that 5-bromosalicylaldehyde amino acid Schiff bases (bs):aa behave as dibasic tridentate ONO ligands and coordinate to Fe(II) in octahedral geometry according to the general formula [Fe(bs:aa)2]·nH2O.

TL;DR: Changing the dye concentration provides tunability between ∼550 nm in the dilute case and ∼620 nm at high concentration, at which point the fluorescence spectrum indicates the formation of R6G aggregates.

TL;DR: Analysis of FT-IR spectra of two-component, fish gelatin-chitosan film revealed the formation not only of hydrogen bonds within and between chains of polymers, but also of electrostatic interactions between -COO(-) of gelatin and -NH3(+) of chitOSan.

TL;DR: In this paper, the tautomerism of curcumin has been investigated in ethanol/water binary mixtures by using UV-Vis spectroscopy and advanced quantum-chemical calculations.

TL;DR: A novel and inexpensive route for the preparation of spinel magnesium aluminate nanoparticles (MgAl2O4) is proposed by synthesizing via sol-gel auto combustion method using oxalic acid, urea, and citric acid fuels at 350°C.

TL;DR: Kinetic evaluation of experimental data showed that the adsorption processes followed well pseudo-second-order and intraparticle diffusion models, and the experimental equilibrium data fitting to Langmuir, Freundlich, Tempkin and Dubinin-Radushkevich models show that the LangmuIR model is a good and suitable model for evaluation and the actual behavior of adsor adaptation.

TL;DR: The prepared gold and silver nanoparticles show good sensing and antimicrobial activity and the presence of biomolecules responsible for the reduction and stability of the prepared silver and gold nanoparticles is confirmed.

TL;DR: The synthesized DdAgNPs showed potent larvicidal activity against second instar larvae of dengue vector Aedes aegypti with a LC50 value of 9.6ppm and particles were polydispersed in nature, spherical in shape and the size of the particle obtained was⩽85nm.

TL;DR: EDS result showed that the amount of Ni in the product is about 9%, these Ni doped hexagonal nanorods exhibits a blue shifts and weak (UV) emission peak, compared with pure ZnO, which may be induced by the Ni-doping different concentrations.

TL;DR: An investigation on Fe-doped ZnO nanopowder synthesized by co-precipitated method annealed at 550°C showed a decrease in the energy gap with increasing Fe content, probably due to an increase in the lattice parameters.

TL;DR: The synthesized AgClNPs were tested for its antibacterial activity and it was found to cause considerable amount of deterioration to bacterial cells, when examined using electron microscope and cell viability analysis.

TL;DR: A green synthetic route for the production of highly stable, bio-inspired silver nanoparticles using dried Saraca indica flower is reported, which is facile, cost effective, simple and reproducible.

TL;DR: The AZO thin films indicate a high transparency in the visible region with an average value of 86%.

TL;DR: The interaction of synthesized ionic liquid, 1-butyl-1-methyl-2-oxopyrrolidinium bromide and bovine serum albumin was investigated using UV-Vis, FT-IR, steady state and time resolved fluorescence measurements and docking studies and indicated that hydrophobic forces play a key role in the binding of BMOP to BSA.

TL;DR: The Schiff base and its metal complexes were evaluated for antimicrobial activity against Gram positive bacteria (Staphylococcus aureus), Gram negative bacteria (Escherichia coli) and fungi (Candida albicans and Aspergillus flavus) and the ligand and some of its complexes were found to be biologically active.

TL;DR: The preliminary bioassay indicates that the Schiff base and its zinc complex exhibit inhibitory activity against the human gastric cancer cell lines.