Results 41 to 50 of about 8,806 (203)

Investigations of the Evolved Molecular Basis for Terpenoid Biosynthesis in Marine Sponges

open access: yesAdvanced Science, EarlyView.
Confirming and extending a previous observation in another Bubarida sponge, genomic and functional analyses of A. cavernosa reveal that sponges retain the mevalonate pathway and employ single α‐domain T1TSs and UbiA‐type TSs for terpenoid biosynthesis. The absence of T1TSs clustering with other biosynthetic genes tentatively suggests, based on limited ...
Fangyan Chen   +6 more
wiley   +1 more source

Modificação do acetato de celulose em meio homogêneo via reações de condensação com diferentes isocianatos Homogeneous chemical modification of cellulose acetate using different isocyanates

open access: yesPolímeros, 1998
Este estudo descreve uma série de reações envolvendo os grupos isocianatos (NCO) e os grupos hidroxílicos do acetato de celulose com grau de substituição (DS) igual a 2,4.
Vagner R. Botaro, Alessandro Gandini
doaj   +1 more source

Isosorbide‐Based Optically Clear Adhesives With Ultrahigh Transparency and Rapid Strain Recovery for Flexible Displays

open access: yesAdvanced Science, EarlyView.
Biomass‐derived isosorbide‐based PUDA crosslinker enables optically clear adhesives with ultrahigh transparency (99.8%), rapid strain recovery, and stable adhesion for flexible displays. ABSTRACT Flexible and foldable displays require optically clear adhesives (OCAs) that combine ultrahigh optical transparency with mechanical resilience under repeated ...
Yoonji Choi   +8 more
wiley   +1 more source

Synthesis of N-Phenylpyrrole Carboximides

open access: yesMolecules, 1999
Several N-phenylpyrrole carboximides were synthesised using acyl isocyanates as intermediates.
Urs Séquin   +4 more
doaj   +1 more source

Diisocyanates influence models of atopic dermatitis through direct activation of TRPA1.

open access: yesPLoS ONE, 2023
We recently used EPA databases to identify that isocyanates, most notably toluene diisocyanate (TDI), were the pollutant class with the strongest spatiotemporal and epidemiologic association with atopic dermatitis (AD).
Manoj Yadav   +7 more
doaj   +1 more source

Transformative Chemie maskierter Ortho‐Chinone: Über die direkte Aktivierung von Guajacol zu Lignin‐basierten Klebstoffen

open access: yesAngewandte Chemie, EarlyView.
Erneuerbare Guajacole werden durch Phenyliodid(III)diacetat rasch zu maskierten ortho‐Chinonen oxidiert und bilden eine neue Monomerklasse, die mit Multithiolen selektive Michael‐Typ‐Polyadditionen zu Polymeren mit Thiol‐Guajacol‐Verknüpfungen eingeht.
Dominik P. Hoch   +7 more
wiley   +1 more source

Occupational Risk Exposure in Automotive Coatings Small and Medium Enterprises: Environmental Controls in the EU and USA Context

open access: yesTrends in Ecological and Indoor Environmental Engineering
Background: Occupational exposure in automotive coatings manufacturing remains a major industrial health concern due to volatile organic compounds (VOCs), isocyanates, and mixed solvent aerosols generated during spraying, mixing, curing, and cleaning ...
Sergij Vambol, Oleksandr Nesterenko
doaj   +1 more source

Transformative Masked Ortho‐Quinone Chemistry: From Direct Guaiacol Activation to Lignin‐Based Adhesives

open access: yesAngewandte Chemie International Edition, EarlyView.
Renewable guaiacols are rapidly oxidized by phenyliodine(III)diacetate to masked ortho‐quinones, giving a new class of monomers that undergo selective Michael‐type polyaddition with multithiols to from thiol‐guaiacol connectivity‐bearing polymers. The activation applies to discrete monomers and directly to lignin, enabling two‐component adhesives that ...
Dominik P. Hoch   +7 more
wiley   +1 more source

New methodology for specific inhalation challenges with occupational agents

open access: yesRespiratory Research, 2010
Background Inhalation challenges are used for diagnosing occupational asthma (OA). The initial methodology consisted of a "realistic" exposure without monitoring nor controlling exposure.
Malo Jean-Luc   +3 more
doaj   +1 more source

Bio-Based Polyurethanes for Sustainable and Multifunctional Applications. [PDF]

open access: yesAdv Sci (Weinh)
Bio‐based polyurethanes prepared from vegetable oils, lignin, and polysaccharides have attracted increasing interest as alternatives to fossil‐derived polyurethanes. This review summarizes recent progress in their chemistry, structural engineering, and advanced applications, highlighting the roles of feedstocks, chain‐segment design, dynamic covalent ...
Li X   +6 more
europepmc   +2 more sources

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