Results 101 to 110 of about 173,009 (382)

Toughening mechanism in elastomer-modified epoxy resins, part 2 [PDF]

The role of matrix ductility on the toughenability and toughening mechanism of elastomer-modified DGEBRA epoxies was investigated. Matrix ductility was varied by using epoxide resins of varying epoxide monomer molecular weights. These epoxide resins were
Pearson, R. A., Yee, A. F.
core   +1 more source

Electrical conductivity of carbon nanofiber reinforced resins: potentiality of Tunneling Atomic Force Microscopy (TUNA) technique [PDF]

, 2003
Epoxy nanocomposites able to meet pressing industrial requirements in the field of structural material have been developed and characterized. Tunneling Atomic Force Microscopy (TUNA), which is able to detect ultra-low currents ranging from 80 fA to 120 ...
Raimondo1, Marialuigia, Guadagno, Liberata, Vertuccio, Luigi, Naddeo, Carlo, Barra, Giuseppina, Spinelli, Giovanni, Lamberti, Patrizia, Tucci, Vincenzo, Lafdi, Khalid   +8 more
core   +3 more sources

Tunable Preparation of α‐Aminoacyl Fluorides and α‐Fluoroamides via Base‐Induced Cascade Multiple‐Cleavage Processes from Bromodifluorohydrin Reagents and Amines

Advanced Synthesis &Catalysis, EarlyView.
A mild and versatile strategy enabling the divergent synthesis of α‐fluoroamides and α‐aminoacyl fluorides from 2‐bromo‐2,2‐difluoro alcohols and amines is developed. The reaction shows broad scope and operational simplicity. Mechanistic and density functional theory studies support the formation of a putative gem‐difluoroepoxide intermediate ...
Giulia De Santis, Andrea Maranzana, Federica Lauria, Mauro Spennacchio, Michael Andresini, Rosa Purgatorio, Marco Colella, Renzo Luisi, Leonardo Degennaro   +8 more
wiley   +1 more source

Trichloroisocyanuric Acid: An Alternate Green Route for the Transformation of Alkenes into Epoxides

Journal of the Brazilian Chemical Society, 2002
The preparation of epoxides is efficiently achieved in mild conditions by reaction of alkenes with trichloroisocyanuric acid in aqueous acetone followed by treatment of the resulting chlorohydrin with aqueous KOH in ether / pentane.
Wengert Mira, Sanseverino Antonio M., Mattos Marcio C. S. de   +2 more
doaj  

One pot ‘click’ reactions: tandem enantioselective biocatalytic epoxide ring opening and [3+2] azide alkyne cycloaddition [PDF]

, 2010
Halohydrin dehalogenase (HheC) can perform enantioselective azidolysis of aromatic epoxides to 1,2-azido alcohols which are subsequently ligated to alkynes producing chiral hydroxy triazoles in a one-pot procedure with excellent enantiomeric excess.
Campbell-Verduyn, Lachlan S.,, Dierckx, Rudi A.,, Elsinga, Philip H.,, Feringa, Ben L.,, Janssen, Dick B.,, Postema, Christiaan P.,, Szymański, Wiktor,   +6 more
core   +2 more sources

Laser‐Induced Graphene from Wood‐Based Composites: Integrating Circuits in Bioderived Furniture

Advanced Sustainable Systems, EarlyView.
This study investigates fully bioderived wood panels made with resin from Jatropha curcas L., onto which conductive laser‐induced graphene (LIG) tracks are directly scribed. The findings obtained on functional circuits ‐ including LEDs and humidity sensors ‐ showcase the viability of combining LIG with renewable substrates for potentially sustainable ...
Anna Chiara Bressi, Lucía Pérez Amaro, Benedetto Pizzo, Attilio Marino, Gianni Ciofani, Francesco Greco   +5 more
wiley   +1 more source

Synthesis, Characterization and Antimicrobial Activity of New 1,2,3-Selenadiazoles

Molecules, 2008
The commercially available aromatic polyketones 1a-d were utilized for the synthesis of the multi-arm1,2,3-selenadiazole derivatives 3a-d. The preparation starts with the reaction between compounds 1a-d and p-toluenesulfonyl hydrazide to give the ...
Mousa Al-Smadi, Fouad Al-Momani
doaj   +1 more source

Catalytic and mechanistic studies into the epoxidation of styrenes using manganese complexes of structurally similar polyamine ligands [PDF]

, 2014
The synthesis and catalytic activity of manganese(ii) complexes of two polyamine ligands is reported which highlights how a small structural change in the ligand affects the overall catalytic behaviour.
Al-Safadi, R, De Faveri, G, Follier, T, Ilyashenko, G, Motevalli, M, Watkinson, M   +5 more
core   +1 more source

Lignin modification by epoxidation

BioResources, 2008
The chemical modification of lignin through hydroxymethylation and epoxidation is a way to develop new application fields and improvement of lignin performances. In this paper the influence of reaction conditions was studied using different samples of unmodified and modified lignins from annual plants (Wheat straw and Sarkanda grass).
Theodor Malutan, Raluca Nicu, Valentin I. Popa   +2 more
openaire   +3 more sources

EETs Reduction Contributes to Granulosa Cell Senescence and Endometriosis‐Associated Infertility via the PI3K/AKT/mTOR Signaling Pathway

Advanced Science, EarlyView.
1) 14, 15‐EET levels were decreased in ovarian granulosa cells, follicular fluid, peritoneal fluid from endometriosis patients. 2) EETs reduction in endometriosis follicular fluid aggravated granulosa cell senescence. 3) ROS reduced 14, 15‐EET levels by upregulating EPHX2 through a mechanism involving histone methylation modification.
Xiang Lin, Weijia Gu, Xiaomei Tong, Mengru Lai, Yi Zhang, Na Liu, Xiaoying Jin, Chao Li, Dong Huang, Feng Zhou, Yongdong Dai, Songying Zhang   +11 more
wiley   +1 more source