This study of self-oscillation was conducted using a new three-phase liquid membrane system of ethanol aqueous solution, benzyl alcohol solution with nonionic surfactant, and pure water. Relations of the initial ethanol concentration to the oscillation amplitude and frequency, and to the induction period before oscillations were investigated. The oscillation amplitude is independent of the initial ethanol concentration, but the frequency and the induction period are related to it. The oscillation frequency increased concomitantly with the increased ethanol initial concentration, but the induction period before the electrical oscillations decreased with increasing concentration. To estimate the influence of ethanol diffusion on the electrical oscillations, the ethanol concentration in each phase was measured using separate experiments after different durations of oscillation. The diffusion coefficient was calculated using Fick's second law. Results show successful estimation of the threshold for oscillations. The threshold is defined in terms of the ethanol concentration at the interface between the benzyl alcohol phase and the pure water phase.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/jp104116q | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
From solubility to efficiency: Per- and polyfluoroalkyl substances (PFAS) regeneration from anion exchange resins.
Sci Total Environ
January 2025
Department of Civil and Environmental Engineering, Temple University, Philadelphia, PA 19122, USA. Electronic address:
This study investigated the regenerability of anion exchange resins for per- and polyfluoroalkyl substances (PFAS), focusing on the interaction between regenerant composition and resin characteristics. The influence of salt type and concentration on PFAS solubility revealed a general decline in perfluorohexane sulfonate (PFHxS) solubility with increased salt concentrations, most strongly with KCl followed by NaCl and NHCl. Mixed solubility results were observed for perfluorooctanoate (PFOA) and perfluorooctane sulfonate (PFOS).
View Article and Find Full Text PDFEthanolic Extract of Leaf Has an Anticancer Activity on Triple-Negative Breast Cancer Cells: An In Vitro Study.
Pharmaceutics
December 2024
Department of Molecular Medicine, School of Medicine, University of Colima, Colima 28040, Mexico.
: , or star fruit, is a shrub known for its medicinal properties, especially due to bioactive metabolites identified in its roots and fruit with anti-cancer activity. However, the biological effects of its leaves remain unexplored. This study aimed to assess the effects of ethanolic extract from leaves on triple-negative breast cancer (TNBC), an aggressive subtype lacking specific therapy.
View Article and Find Full Text PDFBrid., a Bryophyta from Northwest Argentina as a Source of Antioxidants and Antimicrobials.
Plants (Basel)
January 2025
Instituto de Bioprospección y Fisiología Vegetal (INBIOFIV-CONICET-UNT), San Miguel de Tucumán T4000CBG, Argentina.
In recent years, numerous studies have emerged on the biological activities of bryophytes and their potential for therapeutic use. However, mosses appear to be a relatively overlooked group. The objective of this study was to conduct a phytochemical analysis of one hydroalcoholic extract of and to evaluate its potential as an antioxidant and antimicrobial agent.
View Article and Find Full Text PDFVirulence of Five Root-Knot Nematodes ( spp.) on Nine Industrial Hemp ( L.) Varieties and Nematicidal Potential of Hemp Seed Extracts Against .
Plants (Basel)
January 2025
Laboratory of Agricultural Zoology and Entomology, Department of Science of Crop Production, Agricultural University of Athens, 11855 Athens, Greece.
The most common and damaging plant parasitic nematodes are root-knot nematodes (RNK). Although hemp has been clearly infected by RNK, little information is available regarding the extent of the damage and losses caused. In addition, no information is available concerning hemp seed extracts' activity against RNK.
View Article and Find Full Text PDFSalt Stress Enhanced Bioactivity of Quinoa Leaf Extracts: An In Vitro and In Silico Study of Acetylcholinesterase and Tyrosinase Inhibition for Sustainable Drug Development.
Pharmaceuticals (Basel)
January 2025
Department of Biology, College of Science, Hail University, P.O. Box 2440, Ha'il 2440, Saudi Arabia.
Quinoa is recognized for its nutritional and pharmacological properties. This study aims to investigate the impact of salt stress induced by varying concentrations of sodium chloride (NaCl) on the production of phenolic compounds and their biological activities in different quinoa accessions. Leaves from three quinoa accessions (Q4, Q24, and Q45) cultivated under increasing NaCl treatments were subjected to chemical analysis using ethanol and water extract.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!