Results 101 to 110 of about 115,294 (351)

Photooxidation of blends of vinyl alcohol – vinyl acetate copolymer with polyhydroxybutyrate

open access: yesТонкие химические технологии, 2010
The influence of poly(3-hydroxybutyrate) (10-20 weight %) on the expenditure and accumulation of chromophore groups was studied, as well as oxygen absorption upon photooxidation of a vinyl alcohol - vinyl acetate copolymer. The article suggests a kinetic
V. B. Ivanov   +5 more
doaj  

Ferrocene and Ferrocenium Modified Clays and Their Styrene and EVA Composites [PDF]

open access: yes, 2007
In this work, ferrocene- and ferrocenium-containing salts were employed to modify montmorillonite. X-ray measurements show an increase in the interlayer spacing upon clay modification, which means that the larger and more organophilic cations were ...
Manzi-Nshuti, Charles   +1 more
core   +1 more source

Design and Utilization of Stable Hydrofluoroolefin‐Based Trifluoropropynyl Surrogate for Sonogashira Coupling

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A novel methodology for the construction of aromatic and heteroaromatic trifluoropropynyl derivatives has been developed. The new protocol is based on a tandem Sonogashira cross‐coupling reaction between a bench‐stable trifluoropropynyl carbinol reagent, generated from the commercially available and inexpensive hydrofluoroolefin‐1234yf gas, and (hetero)
Emma Bodnár   +3 more
wiley   +1 more source

Chemistry and Biology of Streptogramin A Antibiotics [PDF]

open access: yes, 2007
The streptogramin A antibiotics have proven to be highly active against Gram positive bacteria, particularly methicillin-resistant Staphylococcus aureus. Members of this group of compounds are characterized by a 23-membered macrocycles containing polyene,
Ahmed, Fahim, Donaldson, William
core   +1 more source

Top‐Down Fabricated Wood‐Derived Pressure and Strain Sensors: A Review

open access: yesAdvanced Science, EarlyView.
This review focuses on wood‐derived pressure/strain sensors fabricated via top‐down strategies. It analyzes wood's structural composition, examines processing techniques, discusses sensor types and sensing mechanisms, and reviews existing research. The article concludes with future directions for enhancing performance and scalability.
Yi Ren   +8 more
wiley   +1 more source

Photo-Fries rearrangements of 1-naphthyl (R)-2-phenylpropanoate in poly(vinyl acetate) and ethyl acetate: influence of medium polarity and polymer relaxation on motions of singlet radical pairs

open access: yesAnais da Academia Brasileira de Ciências, 2006
Both the regio- and stereo-chemistries of the photoreactions of 1-naphthyl (R)-2-phenylpropanoate have been investigated in poly(vinyl acetate) films in their glassy (at 5masculineC) and melted (at 50masculineC) states and in ethyl acetate. These results
Xu Jinqi   +2 more
doaj  

Action des copolymères éthylène-acétate de vinyle sur la cinétique de nucléation et de croissance des n-paraffines n milieu hydrocarbure. Effect of Vinyl Ethyleneacetate Copolymers on the Nucleation and Growth Kinetics of N-Paraffins in a Hydrocarbon Medium.

open access: yesOil & Gas Science and Technology, 2006
On cherche à mettre en évidence le mode d'action des copolymères éthylène-acétate de vinyle sur la cinétique de cristallisation des n-paraffines en milieu hydro-carbure.
Petinelli J. C.
doaj   +1 more source

The Ohio State University Libraries Audiovisual Assessment Interim Report [PDF]

open access: yes, 2020
The 26-month audiovisual (AV) assessment took place from June 2017 to August 2019 with a focus on rare or unique audiovisual items. Curators and archivists within each unit identified collections or collecting areas for significance or research value ...
Ohio State University. Libraries
core  

A Degradable Bioinspired Flier with Aerogel‐Based Colorimetric Sensors for Environmental Monitoring

open access: yesAdvanced Science, EarlyView.
Biodegradable fliers are developed inspired by Tipuana tipu samaras, integrating cellulose nanocrystal aerogel (CNCa) sensors loaded with natural dyes for pH and ammonia detection. The lightweight, degradable fliers mimic natural morphology and aerodynamics, offering an eco‐friendly, scalable solution for in situ environmental monitoring after passive ...
Gianpaolo Gallo   +4 more
wiley   +1 more source

EVA implants for controlled drug delivery to the inner ear

open access: yesInternational Journal of Pharmaceutics: X
This study evaluated the potential of poly(ethylene vinyl acetate) (EVA) copolymers as matrix formers in miniaturised implants, allowing to achieve controlled drug delivery into the inner ear.
Y. Bedulho das Lages   +9 more
doaj   +1 more source

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