Results 31 to 40 of about 7,945,843 (370)

The Use of Plasmonic Spectroscopy for Detecting Ultra-Low Concentrations of Substances

open access: yesPhotonics, 2022
This paper presents the results of research into the excitation of a surface electromagnetic wave (SEW) in Au/AgI and Au/Ag films contacting aqueous solutions of hydrogen peroxide (H2O2) and sodium chloride (NaCl).
Michael Kononov   +3 more
doaj   +1 more source

Ferric Chloride Complexes in Aqueous Solution: An EXAFS Study

open access: yesJournal of Solution Chemistry, 2018
A series of concentrated aqueous solutions of ferric chloride with different chloride:iron(III) ratios has been studied by means of EXAFS to determine the structure around the iron(III) ion of the dominating species in such solutions.
I. Persson
semanticscholar   +1 more source

Spectrophotometric Determination of Sulfacetamide and Sulfamethaxazole in Aqueous Solution Using Tetracyanoethylene Reagent [PDF]

open access: yesمجلة التربية والعلم, 2012
A simple and sensitive spectrophotometric method has been developed for determination of sulfacetamide and sulfamethaxazole. The method is based on the reaction of these drugs in aqueous solution with tetracyanoethylene reagent in the presence of sodium ...
Omar A. Al-Taee
doaj   +1 more source

Structure, hydrolysis and diffusion of aqueous vanadium ions from Car-Parrinello molecular dynamics [PDF]

open access: yesThe Journal of Chemical Physics 145, 000000 (2016), 2016
A molecular level understanding of the properties of electroactive vanadium species in aqueous solution is crucial for enhancing the performance of vanadium redox flow batteries (RFB). Here, we employ Car-Parrinello molecular dynamics (CPMD) simulations based on density functional theory to investigate the hydration structures, first hydrolysis ...
arxiv   +1 more source

Arsenic Removal from Aqueous Solutions Using Modified and Unmodified Oak Sawdust [PDF]

open access: yesآب و فاضلاب, 2016
In this research, oak sawdust, in both modified and unmodified forms, was used as an economical and low-cost material for the removal of arsenic from aqueous solutions.
Ali Reza Rahmani, samira Amini
doaj  

EVALUATION FORCES OF INTERACTION OF GOLD NANOPARTICLES AND DNA IN WATER SOLUTION [PDF]

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2014
Analytical evaluation of the interaction of gold nanoparticles with a diameter of 2 nm fragment of deoxyribonucleic acid has been performed at conditions of aqueous solution.
P.V. Komarov
doaj  

Cyclic Dipeptides Formation From Linear Dipeptides Under Potentially Prebiotic Earth Conditions

open access: yesFrontiers in Chemistry, 2021
Cyclic dipeptides (DKPs) are peptide precursors and chiral catalysts in the prebiotic process. This study reports proline-containing DKPs that were spontaneously obtained from linear dipeptides under an aqueous solution. Significantly, the yields of DKPs
Yeting Guo   +15 more
doaj   +1 more source

Systematic comparison of force fields for microscopic simulations of NaCl in aqueous solutions: Diffusion, free energy of hydration and structural properties [PDF]

open access: yesJ. Comput. Chem. 25, 678-689 (2004), 2002
In this paper we compare different force fields that are widely used (Gromacs, Charmm-22/x-Plor, Charmm-27, Amber-1999, OPLS-AA) in biophysical simulations containing aqueous NaCl. We show that the uncertainties of the microscopic parameters of, in particular, sodium and, to a lesser extent, chloride translate into large differences in the computed ...
arxiv   +1 more source

Adsorptive removal of phenol and aniline by modified bentonite: adsorption isotherm and kinetics study

open access: yesApplied Water Science, 2018
In the present study, the adsorptive potential of modified bentonite in a batch system for the removal of aniline and phenol from aqueous solutions was investigated.
Shahin Ahmadi, Chinenye Adaobi Igwegbe
doaj   +1 more source

Specific Na+ and K+ Cation Effects on the Interfacial Water Molecules at the Air/Aqueous Salt Solution Interfaces Probed with Non-resonant Second Harmonic Generation (SHG) [PDF]

open access: yesJ. Chem Phys, 130, 134709, ?2009?, 2008
Here we report the polarization dependent non-resonant second harmonic generation (SHG) measurement of the interfacial water molecules at the aqueous solution of the following salts: NaF, NaCl, NaBr, KF, KCl, and KBr. Through quantitative polarization analysis of the SHG data,the orientational parameter D value and the relative surface density of the ...
arxiv   +1 more source

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