Search
5 articles for “Gibb’s free energy”
-
The thermodynamic studies of 6-(4-chlorophenyl)-1, 2, 3, 4-tetrahydro-2,4-dioxopyrimidine-5-carbonitrile in 60% DMSO in the temperature range 298 to 313 K
Abstract: Densities and viscosities of 6-(4-chlorophenyl)-1, 2, 3, 4-tetrahydro-2,4-dioxopyrimidine-5-carbonitrile have been measured at different concentration in 60% dimethyl sulphoxide (DMSO) in the temperature range 298 to 313 K. The John-Dole equation was used to determine the viscosity. Gibb’s free energy (∆G), entropy change (∆S) and enthalpy change (∆H) were evaluated from relative viscosity . The negative sign of ∆G and ∆H and positive sign of ∆S indicates the spontaneity of reaction …
Published in Journal of Polymer & Composites · Vol. 8, Issue 2, 2020 · pp. 78–81 Read article
-
Heavy Metals Removal by Adsorption Using Aloe barbadensis Miller Leaves Residue Powder for More Sustainable Environment
Abstract: Aloe barbadensis Miller residue from herbal wastes has often proved to be effective in the removal of heavy metals from industrial wastewaters. This study was focused on the adsorption of lead using A.barbadensis Miller residue. The initial concentration of lead ions was varied and the influence of contact time, adsorbent dosage, pH and initial metal concentration on adsorption process were studied. The temperature and agitation speed were kept constant at …
Published in Research and Reviews: A Journal of Microbiology and Virology · Vol. 9, Issue 1, 2019 · pp. 92–98 Read article
-
Dodecahedron Methane Hydrate Cage Structure – An Ab initio Study
Abstract: Comparative study of 512clathrate hydrate cage having different numbers of methane guest molecules encapsulation is carried out by calculating interaction energy, encapsulation energy and thermo-chemical stability parameters using density functional theory-based calculation with B3LYP functional and 6-31G(d) basis set. Nuclear magnetic resonance spectroscopy(NMR), Infrared spectroscopy (IR spectroscopy) and Raman spectroscopy of empty and methane encapsulated 512clathrate hydrate cages, change in Gibbs free energy and methane hydrate formation enthalpy are predicted …
Published in Journal of Petroleum Engineering & Technology · Vol. 2, Issue 1-3, 2012 · pp. 51–64 Read article
-
Investigation of Bio-Physical Interaction and Electrophoretic Properties of Fe3O4/DNA Nanocomposite and Colloids for Biomedical Application
Abstract: In recent years, research on magnetic nanoparticles has gained significant attention. The core concept behind their physics lies in their interaction with biomolecules such as hemoglobin, DNA, and RNA. This study examines the fundamental forces involved in these interactions, including van der Waals attractions, electrostatic repulsion, thermal effects, and magnetic coupling between nanoparticles and biological molecules. To describe these interactions quantitatively, parameters such as zeta potential, magnetic moment density, and …
Published in Research & Reviews : Journal of Physics · Vol. 14, Issue 3, 2025 · pp. 20–32 Read article
-
Turning the Properties of Wastes Paper-Derived Cellulose Nanocrystals for Enhanced Erythromycin Adsorption
Abstract: This study explores the modification, characterization, and adsorption performance of waste paper-derived cellulose nanocrystals (CNCs) for the removal of erythromycin from aqueous solutions. CNCs were modified using organic acid, inorganic acid, and base treatments, and their structural changes were evaluated using FTIR, XRD, and BET analysis. FTIR confirmed the introduction of carboxyl and hydroxyl groups in acid-treated CNCs and deprotonation effects in base-treated CNCs. XRD analysis revealed that organic acid …
Published in Journal of Materials & Metallurgical Engineering · Vol. 16, Issue 1, 2026 · pp. 1–24 Read article