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Fully negatively-charged (FNC) layer-by-layer nanofilms were successfully assembled on a living cell surface for the first time using only poly(acrylic acid) (PAA) by introducing strain-promoted click chemistry to crosslink PAA layers. The resulting nanofilms retained their negative charges and showed higher adsorption of positively-charged molecules without affecting the cell viability.
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http://dx.doi.org/10.1039/d4cc02782e | DOI Listing |
J Phys Chem B
September 2025
Université de Lorraine, CNRS, GeoRessources, Nancy F-54000, France.
Quartz is among the most abundant minerals on Earth, but its surface chemistry under varying pH conditions remains not fully understood. In particular, the interplay between pH, amphoteric behavior, and water adsorption properties has been the subject of a long-standing debate. This study presents a comprehensive, multitechnique investigation into the pH-dependent interfacial chemistry of quartz.
View Article and Find Full Text PDFLangmuir
August 2025
Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China.
Sodium lignosulfonate (SL, a ubiquitous natural organic macromolecule) containing multiple hydrophilic functional groups was widely used in mineral flotation fields to separate valuable minerals and gangues. However, the selective adsorption mechanism of SL on similar mineral surfaces remains not fully elucidated, resulting in the challenges of the precise modulation of mineral flotation separation processes. In this work, SL as an effective depressant was employed in barite flotation systems, realizing the efficient separation of barite from calcite and fluorite.
View Article and Find Full Text PDFMass Spectrom Rev
August 2025
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan.
Because matrix-assisted laser desorption/ionization in-source decay (MALDI-ISD) induces selective cleavage on the peptide backbone, this technique allows reliable identification of peptides and proteins. In the last 15 years, several new matrices have been developed that more efficiently induce MALDI-ISD, opening new research avenues. Fragmentation of peptides by MALDI-ISD can be divided into two categories: reducing and oxidizing matrices induce selective cleavage of N-Cα and Cα-C bonds, respectively.
View Article and Find Full Text PDFInt J Mol Sci
July 2025
Research and Development Department, OOO "NPF "Materia Medica Holding", 129272 Moscow, Russia.
It is well known that aqueous solutions can emit electromagnetic waves in the radio frequency range. However, the physical nature of this process is not yet fully understood. In this work, the possible role of gas nanobubbles formed in the bulk liquid is considered.
View Article and Find Full Text PDFDrug Des Devel Ther
July 2025
Department II (Research Center "Ortho-Center"), Faculty of Dental Medicine, "Victor Babes" University of Medicine and Pharmacy, Timisoara, 300041, Romania.
Background: Nucleic acids are increasingly being recognized for their potential as therapeutic agents for the treatment of a variety of pathologies, such as genetic diseases, viral infections, and cancer. However, the safe delivery of these negatively charged macromolecules to their intended sites of action remains a major challenge.
Purpose: This study aimed to design and characterize cationic particles for use as nonviral vectors for nucleic acid delivery; another primary objective was to evaluate the biocompatibility between the particles and DNA.