Salt concentration-dependent structure of complex coacervate core micelles (C3Ms), formed by polyether-based block copolyelectrolytes containing cationic ammonium (A) or anionic sulfonate (S) groups in aqueous media, is investigated by light scattering and small-angle X-ray/neutron scattering (SAX/NS). As the salt concentration increases, both a core radius () and an aggregation number () significantly decrease, but a corona thickness () is nearly unchanged. Larger salt concentrations can lower the interfacial tension between the coacervate cores and aqueous media, resulting in an increased interfacial area per chain and a more relaxed conformation of the core blocks. Based on the structure characterization, the scaling relationship between structure parameters (i.e., , , and ) and salt concentration is obtained and compared to the theoretical description estimated by the free energy balance between the entropic penalty of core stretching and the interfacial energy. We propose that the free energy contribution of the core block stretching is not negligible in C3Ms because of the highly swollen cores caused by water.
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http://dx.doi.org/10.1021/acs.jpcb.3c06004 | DOI Listing |
Phys Chem Chem Phys
January 2025
Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84536 Bratislava, Slovakia.
The solvent effect on the indirect J(M-P) spin-spin coupling constant in phosphine selenoether -substituted acenaphthene complexes LMCl is studied at the PP86 level of nonrelativistic and four-component relativistic density functional theory. Depending on the metal, the solvent effect can amount to as much as 50% or more of the total -value. This explains the previously found disagreement between the J(Hg-P) coupling in LHgCl, observed experimentally and calculated without considering solvent effects.
View Article and Find Full Text PDFGigascience
January 2025
Leibniz Institute for the Analysis of Biodiversity Change, Museum Koenig Bonn, 53113 Bonn, Germany.
Background: In this study, we present an in-depth analysis of the Eurasian minnow (Phoxinus phoxinus) genome, highlighting its genetic diversity, structural variations, and evolutionary adaptations. We generated an annotated haplotype-phased, chromosome-level genome assembly (2n = 50) by integrating high-fidelity (HiFi) long reads and chromosome conformation capture data (Hi-C).
Results: We achieved a haploid size of 940 megabase pairs (Mbp) for haplome 1 and 929 Mbp for haplome 2 with high scaffold N50 values of 36.
Chem Commun (Camb)
January 2025
College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Posts & Telecommunications (NJUPT), Nanjing, 210023, China.
Traditional sensors struggle in complex human environments, particularly with humidity and strain detection requiring high sensitivity and robust anti-interference. This work introduces a flexible, miniaturized, low-cost dual-mode sensor that combines a novel resonator structure with a chemically modified conducting polymer, enabling simultaneous strain and humidity detection alongside high anti-interference performance sensitivity and wireless transmission.
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January 2025
Manchester Institute of Biotechnology, School of Natural Sciences, University of Manchester, Manchester, UK.
Collagen is the most ubiquitous protein in the animal kingdom and one of the most abundant proteins on Earth. Despite having a relatively repetitive amino acid sequence motif that enables its triple helical structure, in type 1 collagen, that dominates skin and bone, there is enough variation for its increasing use for the biomolecular species identification of animal tissues processed or degraded beyond the amenability of DNA-based analyses. In recent years, this has been most commonly achieved through the technique of collagen peptide mass fingerprinting (PMF) known as ZooMS (Zooarchaeology by Mass Spectrometry), applied to the analysis of tens of thousands of samples across over one hundred studies in the past decade alone.
View Article and Find Full Text PDFBiol Cell
January 2025
CRBM (Centre de Recherche en Biologie cellulaire de Montpellier), BIOLuM, University of Montpellier, CNRS UMR 5237, Montpellier, France.
Flotillin 1 and 2 are highly conserved and homologous members of the stomatin, prohibitin, flotillin, HflK/C (SPFH) family. These ubiquitous proteins assemble into hetero-oligomers at the cytoplasmic membrane in sphingolipid-enriched domains. Flotillins play crucial roles in various cellular processes, likely by concentrating sphingosine.
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