The present work aims at evidencing the "kosmotrope" nature of trehalose through the analysis of inelastic neutron scattering measurements on trehalose and sucrose water solutions at different temperatures. Neutron spectra were collected by using the spectrometer MARI at the ISIS pulsed neutron source of the Rutherford Appleton Laboratory (Chilton, UK). To study the structural modifications induced on the tetrahedral hydrogen-bond network of water by homologous disaccharides, as a first step, the vibrational properties of pure water at different temperatures have been investigated. In particular, the temperature behavior of the intramolecular OH stretching mode has been analyzed. Successively, the vibrational properties for pure water have been compared with those of the sugar water solutions focusing the attention on the tetrahedral network-forming tendency. Finally, the obtained findings have been compared with previous Raman scattering evidences, and the results interpreted in the frame of recent molecular dynamics simulation works.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1063/1.1887167 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Experimental unified pH scale in 1,2-dichloroethane.
Phys Chem Chem Phys
January 2025
Institute of Chemistry, University of Tartu (UT), Ravila Street 14a, 50411 Tartu, Estonia.
Experimental potentiometric unified pH (pH) scale is presented in 1,2-dichloroethane (1,2-DCE). The scale was compiled using differential potentiometric measurements, carried out by pair-wise comparisons between solutions. Aqueous standard buffer solutions were used as anchor points, so that the obtained pH values are linked to (, are traceable to) the conventional aqueous pH scale and are expressed as values.
View Article and Find Full Text PDFDouble-blind randomised trial of saline solution for gargling and nasal rinsing in SARS-CoV-2 infection.
J Glob Health
December 2024
Department of Anesthesiology, Critical Care and Pain Medicine, UTHealth, Houston, Texas, USA.
Background: Previous studies have shown that hypertonic saline nasal irrigation and gargling reduced the duration of symptoms in upper respiratory infections caused by coronavirus. This study aims to investigate the effects of two saline regimens on symptoms associated with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2).
Methods: Between 2020 and 2022, individuals aged 18-65 years who tested positive for SARS-CoV-2 infection via polymerase chain reaction (PCR) were randomly assigned to either low- or high-saline regimens for 14 days.
Hydroxyl Radical-π Interaction in a Single Crystal.
JACS Au
January 2025
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
Numerous attempts for organic radical stability mostly entail steric hindrance, spin-delocalization, supramolecular interaction with the host, π-π interactions, and hydrogen bonding. To date, there is no report of single crystals containing a hydroxyl radical (OH). In this work, we have stabilized OH in the crystal, which has been obtained from the filtrate after separating the precipitate of the chromenopyridine radical (DCP(2)) from the reaction mixture.
View Article and Find Full Text PDFElectrochemical Cycling of Liquid Organic Hydrogen Carriers as a Sustainable Approach for Hydrogen Storage and Transportation.
ACS Sustain Chem Eng
January 2025
Department of Chemical Engineering, The City College of New York, CUNY, New York, New York 10031, United States.
Hydrogen (H), as a high-energy-density molecule, offers a clean solution to carry energy. However, the high diffusivity and low volumetric density of H pose a challenge for long-term storage and transportation. Liquid organic hydrogen carriers (LOHCs) have been suggested as a strategic way to store and transport hydrogen in stable molecules.
View Article and Find Full Text PDFAntimycobacterial and Antifungal Activities of Leaf Extracts From .
Scientifica (Cairo)
December 2024
Department of Therapeutics, Natural Products Unit, Wilkins Hospital Block C, Cnr J. Tongogara and R. Tangwena, The African Institute of Biomedical Research and Technology (AiBST), Harare, Zimbabwe.
The global problem of infectious and deadly diseases caused by microbes such as candida and mycobacteria presents major scientific and medical challenges. Antimicrobial drug resistance is a rapidly growing problem with potentially devastating consequences. Various pathogens can cause skin infections, such as bacteria, fungi, and parasites.
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!