We present a combined x-ray absorption spectroscopy/computational study of water in hydrochloric acid (HCl) solutions of varying concentration to address the structure and bonding of excess protons and their effect on the hydrogen bonding network in liquid water. Intensity variations and energy shifts indicate changes in the hydrogen bonding structure in water as well as the local structure of the protonated complex as a function of the concentration of protons. In particular, in highly acidic solutions we find a dominance of the Eigen form, H(3)O(+), while the proton is less localized to a specific water under less acidic conditions.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1063/1.2199828 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The nanoscale organization of the Nipah virus fusion protein informs new membrane fusion mechanisms.
Elife
January 2025
Institute of Parasitology, Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, Canada.
Paramyxovirus membrane fusion requires an attachment protein for receptor binding and a fusion protein for membrane fusion triggering. Nipah virus (NiV) attachment protein (G) binds to ephrinB2 or -B3 receptors, and fusion protein (F) mediates membrane fusion. NiV-F is a class I fusion protein and is activated by endosomal cleavage.
View Article and Find Full Text PDFDeep Learning-Based SD-OCT Layer Segmentation Quantifies Outer Retina Changes in Patients With Biallelic RPE65 Mutations Undergoing Gene Therapy.
Invest Ophthalmol Vis Sci
January 2025
Institute for Applied Mathematics, University of Bonn, Bonn, Germany.
Purpose: To quantify outer retina structural changes and define novel biomarkers of inherited retinal degeneration associated with biallelic mutations in RPE65 (RPE65-IRD) in patients before and after subretinal gene augmentation therapy with voretigene neparvovec (Luxturna).
Methods: Application of advanced deep learning for automated retinal layer segmentation, specifically tailored for RPE65-IRD. Quantification of five novel biomarkers for the ellipsoid zone (EZ): thickness, granularity, reflectivity, and intensity.
Effects of water and sediment chemistry variables on aquatic macroinvertebrate community structuring in a subtropical Austral river system.
Environ Sci Pollut Res Int
January 2025
South African Institute for Aquatic Biodiversity, Makhanda, 6140, South Africa.
Riverine physical and chemical characteristics are influencing ecosystem integrity while shaping and impacting species richness and diversity. Changes in these factors could potentially influence community structuring through competition, predation and localised species extinctions. In this study, eight sampling sites over multiple seasons were assessed along the streams draining the City of Nelspruit, South Africa, to examine river health based on water and sediment quality, while using macroinvertebrates as bioindicators for pollution.
View Article and Find Full Text PDFActivity Space Mapping and Pre-Exposure Prophylaxis Uptake Among Gay, Bisexual, and Other Sexual Minority Men in Small Cities and Towns in the United States.
AIDS Behav
January 2025
Department of Social and Behavioral Sciences, Yale School of Public Health, 60 College Street, New Haven, CT, 06510, USA.
In the US, gay, bisexual, and other sexual minoritized men (GBSMM) remain disproportionately impacted by HIV, and continue to experience unmet needs for pre-exposure prophylaxis (PrEP). A growing body of literature has underscored the need to consider the geographic factors of HIV prevention, particularly beyond administrative boundaries and towards localized spaces that influence the accessibility and utilization of health-promoting resources. Therefore, the purpose of this study is to examine the associations of driving times from activity spaces to PrEP offering facilities and individual PrEP uptake.
View Article and Find Full Text PDFOctahedral small virus-like particles of dengue virus type 2.
J Virol
December 2024
Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA.
Unlabelled: Flavivirus envelope (E) and precursor M (prM) proteins, when ectopically expressed, assemble into empty, virus-like particles (VLPs). Cleavage of prM to M and loss of the pr fragment converts the VLPs from immature to mature particles, mimicking a similar maturation of authentic virions. Most of the VLPs obtained by prM-E expression are smaller than virions; early, low-resolution cryo-EM studies suggested a simple, 60-subunit, icosahedral organization.
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!