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Hypothesis: The milder interaction with biosystems makes the zwitterionic surfactants an important class of surfactants, and they are widely used in biological applications and in personal care formulations. An important aspect of those applications is their strong synergistic interaction with anionic surfactants. It is anticipated that the strong interaction will significantly affect the adsorption and self-assembly properties.
Experiments: Surface tension, ST, neutron reflectivity, NR, and small angle neutron scattering, SANS, have been used here to explore the synergistic mixing in micelles and at the air-water interface for the zwitterionic surfactant, dodecyldimethylammonium propanesulfonate, CSB, and the anionic surfactants, alkyl ester sulfonate, AES, in the absence and presence of electrolyte, 0.1 M NaCl.
Findings: At the air-water interface the asymmetry of composition in the strong synergistic interaction and the changes with added electrolyte and anionic surfactant structure reflect the relative contributions of the electrostatic and steric interactions to the excess free energy of mixing. In the mixed micelles the synergy is less pronounced and indicates less severe packing constraints. The micelle structure is predominantly globular to elongated, and shows a pronounced micellar growth with composition which depends strongly upon the nature of the anionic surfactant and the addition of electrolyte.
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http://dx.doi.org/10.1016/j.jcis.2022.01.045 | DOI Listing |
ACS Appl Bio Mater
December 2024
Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Hyderabad 502285, India.
Triple-negative breast cancer (TNBC) is known for its aggressive nature, typically presenting as high-grade tumors that grow and spread quickly in all breast cancer types. Several studies have reported a strong correlation between cancer and microbial infections due to a compromised immune system. The most frequent infection associated with surface malignancies, including breast cancer, is Candidiasis, which is majorly caused by .
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December 2024
Department of Biotechnology, Prathyusha Engineering College, Tiruvallur, Chennai, 602025, Tamilnadu, India.
The present study introduces a minimalistic and cost-effective approach to synthesising Gold nanoparticles (AuNPs) using aqueous leaf extracts of Andrographis paniculata. In this synthesis, bioactive metabolites in the leaf extract act as reducing agents, converting Au³⁺ ions to metallic Au⁰, while proteins in the extract form a stabilising layer around the nanoparticles to prevent agglomeration and maintain particle size stability. The synthesised AuNPs were systematically characterised using a range of analytical techniques.
View Article and Find Full Text PDFInorg Chem
December 2024
School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China.
In semiconductor catalysts, rational doping of nonmetallic elements holds significant scientific and technological importance for enhancing photocatalytic performance. Here, using a one-step hydrothermal technique, we synthesized iodine-doped BiOCl composite and evaluated the impact of iodine doping on its photocatalytic capability for organic dye degradation under visible light irradiation. In this study, we demonstrate that the introduction of iodide ions not only provides an ideal built-in electric field (BIEF) for BiOCl but also induces the generation of additional oxygen vacancies (OVs).
View Article and Find Full Text PDFAMB Express
December 2024
Department of Laboratory Medicine, The Affiliated Changsha Hospital of Xiangya School of Medicine (The First Hospital of Changsha), Central South University, No. 311, Yingpan Road, Changsha, 410005, Hunan, China.
Antibiotic resistance by methicillin-resistant Staphylococcus aureus (MRSA) is an urgent threat to human health. The biofilm and persister cells formation ability of MRSA and Staphylococcus epidermidis often companied with extremely high antimicrobial resistance. Pinaverium bromide (PVB) is an antispasmodic compound mainly used for irritable bowel syndrome.
View Article and Find Full Text PDFAnal Chem
December 2024
Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College of Chongqing University, Chongqing 400044, PR China.
The CRISPR/Cas technology shows great potential in molecular detection and diagnostics. However, it is still challenging to detect multiple targets simultaneously using the CRISPR-Cas system. Herein, we ingeniously leverage the synergistic effect of two short single-stranded DNA activators to construct a CRISPR/Cas12a-driven electrochemical sensing platform based on an AND logic circuit ("AND" LC-CRISPR) for the simultaneous detection of dual miRNAs.
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