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This comment discussed the calculation of thermodynamic parameters about the paper of Jemutai-Kimosop et al. (2020) and Conde-Cid et al. (2019). Although these articles are valuable, in these cases, the equilibrium constant (K), which is used for the calculation of thermodynamic parameter is incorrect. The root reason for the errors in both articles is that the non-standard equilibrium constant was used to calculate the thermodynamic parameter, which is contrary to the principle of thermodynamics. This comment provided a correct method for the calculation of the standard equilibrium constant by using the distribution coefficient and Langmuir equation. This note can avoid the misuse and propagation of the incorrect equation in the area of adsorption thermodynamics.
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http://dx.doi.org/10.1016/j.envres.2020.109610 | DOI Listing |
Arch Biochem Biophys
September 2025
Department of Chemistry and Biochemistry, Howard College of Arts and Sciences, Samford University, 800 Lakeshore Drive, Birmingham, AL, USA, 35229. Electronic address:
Tetrahydrodipicolinate N-succinyltransferase (DapD) catalyzes the reaction of tetrahydrodipicolinate (THDP) and succinyl-CoA to form (S)-2-(3-carboxypropanamido)-6-oxoheptanedioic acid and coenzyme A. The enzyme is in the diaminopimelate-lysine biosynthesis pathway which produces two metabolites necessary for the survival and growth of pathogenic bacteria. Since lysine is an essential amino acid to humans, DapD is a potentially safe target for antibiotic therapies.
View Article and Find Full Text PDFJ Phys Chem A
September 2025
MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, P. R. China.
Understanding the active sites of copper (Cu)-based catalysts toward CO is a prerequisite for improving their rational design. The reactivity of copper oxide cluster anions CuO ( = 3-9) and bare copper cluster anions Cu toward CO has been investigated at room temperature by employing mass spectrometry combined with density functional theory (DFT) calculations. Only adsorption products are observed for the reaction of CuO with CO.
View Article and Find Full Text PDFSci Total Environ
September 2025
Laboratoire Physico-Chimie des Matériaux, Substances Naturelles et Environnement, Faculty of Sciences and Techniques, Abdelmalek Essaâdi University, Tangier, Morocco.
Escalating concentrations of norfloxacin (NFX) in surface and wastewaters demand sustainable remediation strategies. In this study, dual-functional hydrochars were synthesized from argan nut shells (ArNS) via hydrothermal carbonization (HTC), with process conditions optimized by varying temperature (150-200 °C) and residence time (2-6 h). Among the materials, H1:5@150-4-prepared at 150 °C for 4 h with a biomass-to-water ratio of 1:5-exhibited the best performance, achieving a monolayer NFX adsorption capacity of 27.
View Article and Find Full Text PDFACS Macro Lett
September 2025
Pritzker School of Molecular Engineering, The University of Chicago, Chicago, Illinois 60637, United States.
Introducing dynamic covalent chemistries into polymer networks allows access to complex linear viscoelasticity, owing to the reversible nature of the dynamic bonds. While this macroscopic mechanical behavior is influenced by the dynamic exchange of these chemistries, connecting the microscopic dynamics to the bulk properties is hindered by the time scale conventional techniques can observe. Here, light scattering passive microrheology is applied to probe short-time dynamics of dynamic covalent networks that consist of telechelic benzalcyanoacetate (BCA) Michael acceptors and thiol-functionalized cross-linkers.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
Department of Physics and Chemistry, DGIST, Daegu, 42988, Republic of Korea.
Investigation of the fundamental microscopic processes occurring in organic reactions is essential for optimising both organocatalysts and synthetic strategies. In this study, single-molecule fluorescence microscopy was employed to study the Diels-Alder reaction catalysed by a first-generation MacMillan catalyst, providing direct insights into its kinetic dynamics. This reaction proceeds via a series of reversible processes under equilibrium conditions (S ⇄ IM ⇄ IM → P, IM and IM: N,O-acetal and iminium ion intermediates, respectively).
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