Article
Chemistry, Analytical
Sayed Mohamed Derayea, Mahmoud Ahmed Omar, Mohamed Abdelkhalek Hammad, Yasser Farag Hassan, Khalid M. Badr El-Din
Summary: A simple, sensitive, rapid, and specific spectroftuorimetric procedure was developed for the analysis of fluoroquinolones in Pharmaceuticals and biological fluids. The method showed good linearity, low detection limits, and excellent accuracy for the determination of different drugs.
MICROCHEMICAL JOURNAL
(2021)
Article
Spectroscopy
Sayed M. Derayea, Yasser F. Hassan, Mohamed A. Hammad, Yasser M. Alahmadi, Mahmoud A. Omar, Ebtihal Samir
Summary: The aim of this study was to develop a rapid and convenient fluorimetric method for analyzing lomefloxacin. The method utilized the complex formation between the drug and aluminum ion to produce a highly fluorescent product. The addition of sodium dodecyl sulfate further enhanced the fluorescence intensity, which was measured at 429 nm after excitation at 332 nm. The relationship between emission intensity and lomefloxacin concentration was linear from 10-130 ng mL-1, with a correlation coefficient of 0.9996. The method demonstrated high accuracy and reliability in quantifying the drug in tablet formulations and real human plasma.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Sarah J. J. Gray, Martin Walker, Rachel Hendrikse, Mark R. R. Wilson
Summary: We investigated the transferability of DPD models in predicting anionic surfactant phase diagrams. Parameters were developed that accurately represented the phase diagrams of SDS and LAS across a wide range of concentrations. These parameters were found to be easily transferable to other systems and showed excellent agreement with experimental measurements.
Article
Biochemistry & Molecular Biology
Hamed Zahraee, Fatemeh Mohammadi, Elahe Parvaee, Zahra Khoshbin, Seyed Shahriar Arab
Summary: In this study, it was found through molecular dynamics simulations that SDS at concentrations below the critical micelle concentration can inhibit the aggregation of A beta 1-42. An increase in the interaction between A beta 1-42 and SDS molecules reduces their aggregation probability. The reduced compactness parameter also indicates a decreased aggregation probability for A beta 1-42. Based on energetic FEL landscapes, SDS molecules with concentrations close to the CMC are effective inhibitors in preventing the formation of A beta 1-42 fibrils. Additionally, the direction of peptide pair aggregation can be predicted by determining the direction of accumulation-deterrent forces.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2023)
Article
Chemistry, Physical
Mohamed Shehata, Aise Unlu, Javier Iglesias-Fernandez, Silvia Osuna, O. Ugur Sezerman, Emel Timucin
Summary: In this study, the effect of the ionic surfactant sodium dodecyl sulfate (SDS) on the structure and activity of thermoalkalophilic lipases was analyzed using molecular dynamics simulations and lipase activity assays. The results showed that SDS can stabilize the active lipase by binding to the acyl-chain binding pocket or transforming the closed conformation to an open-like state. Experimental analysis also revealed increased lipase activity upon SDS incubation at ambient temperature. Overall, this study provides insights into the possible substrate mimicry by SDS for thermoalkalophilic lipases without temperature elevation.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Engineering, Environmental
Zhiqiang Xu, Lankun Cai, Xue Liang, Shuguang Lyu
Summary: This study investigated the degradation of trichloroethene (TCE) in the Fe(II)/citric acid (CA) activated persulfate (PS) system with the addition of sodium dodecyl sulfate (SDS) surfactant. The results showed that alkaline condition and the presence of SDS improved the efficiency of TCE degradation in the PS/Fe(II)/CA system. The study also identified the major reactive oxygen species (ROS) responsible for TCE degradation and proposed the possible decomposition pathway of SDS.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Ola Grabowska, Krzysztof Zamojc, Michal Olewniczak, Lech Chmurzynski, Dariusz Wyrzykowski
Summary: The aggregation behavior of sodium dodecyl sulfate (SDS) in the presence of increasing concentrations of selected sodium 1-alkylsulfonates was studied. The critical micelle concentration (CMC) of SDS was determined, and the micellar aggregation numbers (Nagg) of the surfactant were obtained. The thermodynamic parameters of micellization were determined and compared. It was found that SDS was significantly affected by the alkyl chain length and concentration of the selected sodium 1-alkylsulfonates.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Didier Nivon-Ramirez, Luis I. Reyes-Garcia, Raul Oviedo-Roa, Rodolfo Gomez-Balderas, Carolina Zuriaga-Monroy, Jose-Manuel Martinez-Magadan
Summary: The critical micellar concentration (CMC) of sodium dodecyl sulfate (SDS) in water at different temperatures was determined through experimental and simulation methods. The experimental results were consistent with previous studies, and the simulation results matched the experimental findings.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Keita Hayashi, Haruna Sugimura, Toshiyuki Kamei, Toshinori Shimanouchi, Hidemi Nakamura, Hiroshi Umakoshi
Summary: This study quantifies the hydrophobicity within aggregates by modifying the localization of pyrene moieties, indicating a gradual increase in hydrophobicity from the interface to the core. There was no significant difference in hydrophobicity within the aggregates, and analysis suggested the presence of a few water molecules in the deep region, supporting the idea of localized embedded molecules in aggregates.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Polymer Science
Samhitha Kancharla, Dengpan Dong, Dmitry Bedrov, Paschalis Alexandridis, Marina Tsianou
Summary: This study investigates the properties of assemblies formed by polymer and perfluorooctanoic acid ammonium salt (PFAS) in aqueous solution. It is found that the nonionic polymer poly(ethylene oxide) (PEO) can form mixed micelles with PFAS, altering their association number and shape.
Article
Chemistry, Multidisciplinary
Monika Choudhary, Syed Mohammad Kamil
Summary: In this study, dissipative particle dynamics (DPD) simulations were used to investigate the phase transition of a mixture of cationic and anionic surfactants in an aqueous solution. The results showed that the relative difference in tail lengths and harmonic bond parameters had a significant impact on the phase diagram. The simulations also revealed enhanced self-assemblies with different tail lengths and harmonic bond parameters, which could have potential applications in the future.
Article
Chemistry, Physical
Darya L. Gurina, Yury A. Budkov
Summary: This study investigates the self-assembly process of reverse micelles in carbon tetrachloride and supercritical carbon dioxide, and explores the impact of solvent type, surfactant structure, water/surfactant ratio, and surfactant concentration on the size and shape of reverse micelles. The study also examines the solubilization of methyl orange by reverse micelles in pure supercritical carbon dioxide and ethanol-modified supercritical carbon dioxide.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Anup K. Prasad, Chandni Tiwari, Sourav Ray, Stephanie Holden, David A. Armstrong, K. Johan Rosengren, Alison Rodger, Ajay S. Panwar, Lisandra L. Martin
Summary: This study investigates the structural changes of antimicrobial and amyloidogenic peptides in the presence of a membrane mimetic surfactant, sodium dodecyl sulfate (SDS). The results show that the peptides display increased stability and a tendency towards alpha-helical structures in the presence of SDS.
Article
Chemistry, Physical
Prateek Chowdhury, Debdip Bhandary
Summary: This article reports the results of molecular dynamics simulations investigating the self-aggregation of sodium dodecyl sulfate (SDS) at the interface of mica and water. SDS molecules at different surface concentrations form distinct aggregated structures near the mica surface. The structural and thermodynamic properties are calculated to understand the self-aggregation process, and the changes in free energy and shape during the process are reported to model a generic pathway for surfactant-based targeted delivery systems.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Chemistry, Physical
Prateek Chowdhury, Debdip Bhandary
Summary: This article reports the results of molecular dynamics simulations on the self-aggregation of sodium dodecyl sulfate (SDS) at the interface of mica and water. It is found that SDS molecules can form distinct aggregate structures at different surface concentrations. The study investigates various structural and thermodynamic properties to understand the process of self-aggregation. The results can provide a generic pathway for surfactant-based targeted delivery systems.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)