Results 121 to 130 of about 258,318 (261)

Electronic Smoking Devices Among University Students: Usage Patterns and Chemical Composition of Inhaled Substances

open access: yesAnalytical Science Advances, Volume 7, Issue 1, June 2026.
ABSTRACT This study investigated the prevalence of electronic smoking device (ESD) use and its associated behavioural and chemical risks among university students in Bahia, Brazil. A cross‐sectional survey was conducted with 355 students from public and private institutions through an online questionnaire between April and May 2023. Among participants,
Eduard F. Valenzuela   +7 more
wiley   +1 more source

Process for preparing phthalocyanine polymer from imide containing bisphthalonitrile [PDF]

open access: yes, 1987
Imide-linked bisphthalonitrile compounds are prepared by combining a dicyano aromatic diamine and an organic dianhydride to produce an amic acid linked bisphthalonitrile compound.
Achar, Bappalige N.   +2 more
core   +1 more source

Stimuli‐Responsive Crosslinked Chitosan/PVP/PEG Hydrogel Networks for Targeted Drug Delivery and Antimicrobial Performance

open access: yesAnalytical Science Advances, Volume 7, Issue 1, June 2026.
ABSTRACT In this study, a unique pH‐sensitive PEG/C/PVA hydrogel based on chitosan (C), polyvinyl propylene (PVP) and polyethylenglycol (PEG) crosslinked with tetraethyl orthosilicate (TEOS) was fabricated. This PEG/C/PVA hydrogel was designed to deliver different drugs with distinct release profiles, including diclofenac sodium and ciprofloxacin, and ...
Danial Mazhar   +4 more
wiley   +1 more source

One‐Pot Amidation/C─H Halogenation by an Efficient Electrochemical Cascade

open access: yesAngewandte Chemie, Volume 138, Issue 19, 4 May 2026.
A sustainable electrochemical cascade enables the one‐pot synthesis of regioselectively halogenated N‐aryl amides from readily available amines and acyl halides under mild conditions. The method merges amidation and C─H halogenation in a single operational step, delivering broad substrate scope, high selectivity, and scalability, and provides an ...
Sudipta Ponra   +8 more
wiley   +2 more sources

Extension of the B3LYP - Dispersion-Correcting Potential Approach to the Accurate Treatment of both Inter- and Intramolecular Interactions

open access: yes, 2013
We recently showed that dispersion-correcting potentials (DCPs), atom-centered Gaussian-type functions developed for use with B3LYP (J. Phys. Chem. Lett.
DiLabio, Gino A.   +2 more
core   +1 more source

Polyvinylidene Fluoride: A Growing Specialty Polymer with Many Facets

open access: yesChinese Journal of Chemistry, Volume 44, Issue 10, Page 1697-1710, 15 May 2026.
Comprehensive Summary Polyvinylidene fluoride (PVDF), the second largest produced fluoropolymer, exhibits outstanding chemical, physical, electroactive and electrochemical properties and is involved in many High‐Tech applications. This review reports recent novelties in synthesis, characterization, processes and applications. Recent preparation studies
Bruno Améduri
wiley   +1 more source

Atmospheric Research and Monitoring Study of Hazardous Substances [PDF]

open access: yes, 1985
Hazardous Waste Research and Information Center Illinois Department of Energy and Natural ...
Gatz, Donald F., Sweet, Clyde W.
core  

Inhibitors Targeting SARS‐CoV‐2 Papain‐Like Protease: Screening, Design, Synthesis, and Biological Evaluation

open access: yesChemMedChem, Volume 21, Issue 9, 14 May 2026.
In our study, we obtained both non‐covalent and covalent PLpro inhibitors. Additionally, the stable protein‐ligand interactions of the active compound were examined using advanced computational docking and molecular dynamics simulations. The non‐covalent inhibitor 2t showed antiviral activity with an EC50 of 2.89 µM, indicating its potential as a ...
Elena‐Oriana Iuga   +11 more
wiley   +1 more source

1,4‐Pentanediol as an Alternative Biomass‐Derived Medium for the Phosphine‐Free Heck Coupling Reactions

open access: yesChemSusChem, Volume 19, Issue 9, 14 May 2026.
In this research, a phosphine‐free Heck coupling reaction was performed using biomass‐derived 1,4‐pentanediol and a polar protic solvent. It was demonstrated that a wide scope of products could be isolated by a simple filtration, eliminating the high‐solvent‐consuming column chromatography and reducing the E‐factor by more than 90% compared to ...
Csaba Árvai, László T. Mika
wiley   +1 more source

Silylation of Carbohydrate Syrups [PDF]

open access: yes, 1979
Introduction Carbohydrates are usually difficult to analyze in solutions. Gas chromatography provides a suitable means for analysis. However most carbohydrate compounds are not volatile enough for use by this method.
Gorwitz, Mark
core   +1 more source

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