Results 101 to 110 of about 182,970 (169)

Magnetic lipase B from Candida antarctica (CALB) biocatalyst for integrated valorization of tilapia by‐products and biodiesel biorefining

Biofuels, Bioproducts and Biorefining, Volume 20, Issue 4, Page 1835-1860, July/August 2026.
Abstract The immobilization of lipase B from Candida antarctica (CALB) on an amino‐epoxy functionalized magnetic support (Fe3O4‐PEI‐DGEBA) resulted in a highly stable and efficient biocatalyst for biofuel production from tilapia oil. The synthesized support was characterized using scanning electron microscopy, transmission electron microscopy, X‐ray ...
Rafael Leandro Fernandes Melo, Francisco Simão Neto, Bruno Caio Chaves Fernandes, Paulo Gonçalves de Sousa Junior, Patrick da Silva Sousa, Tiago Melo Freire, Raniere Dantas Valença, Frederico Ribeiro do Carmo, Marcos Reinaldo da Silva, Leonardo Farias Serafim, João Maria Soares, Pierre Basílio Almeida Fechine, José Cleiton Sousa dos Santos   +12 more
wiley   +1 more source

Synthetic Chiral Derivatives of Xanthones: Biological Activities and Enantioselectivity Studies

Molecules, 2019
Many naturally occurring xanthones are chiral and present a wide range of biological and pharmacological activities. Some of them have been exhaustively studied and subsequently, obtained by synthesis.
Carla Fernandes, Maria Letícia Carraro, João Ribeiro, Joana Araújo, Maria Elizabeth Tiritan, Madalena M. M. Pinto   +5 more
doaj   +1 more source

Active and Versatile ROP Aluminum Catalysts for the Controlled Limonene Oxide Polymerization and Copolymerization With Anhydrides

ChemCatChem, Volume 18, Issue 13, 14 July 2026.
Highly active aluminum catalysts for the ring‐opening copolymerization of LO and PA able to produce syndiotactic alternating copolyester within 3 h are presented. The role of DMAP as cocatalysts for the copolymerization is key and is involved in the opening of the anhydride, however, it blocks the catalytic activity for the LO ROP.
Miguel Palenzuela, Jesús Damián, Francisco Garcia‐Valle, M Teresa Muñoz, Belen Monje, Ana Mangas, Christopher J. Whiteoak, Tomás Cuenca, Marta E. G. Mosquera   +8 more
wiley   +1 more source

Química Orgânica Essencial

Boletim da Sociedade Portuguesa de Química, 2023
Vasco D. B. Bonifácio
semanticscholar   +1 more source

p‐Sulfonatocalix[4]arene‐Based Ratiometric Fluorescence Chemosensor Array for the Differential Detection of Polycationic Peptides

ChemistryEurope, Volume 4, Issue 7, July 2026.
A ratiometric fluorescence chemosensor array based on pyrene‐functionalized calixarenes enables complexation‐induced aggregation sensing of polycationic peptides in water. The system discriminates closely related sequences differing by minimal arginine content, including biologically relevant coronavirus spike protein cleavage‐site motifs, highlighting
Joana N. Martins, Márcia Pessêgo, Lucia Méndez‐Gómez, Hanieh Mahmoodi, Javier Montenegro, Luis Garcia‐Rio, João Carlos Lima, Nuno Basílio   +7 more
wiley   +1 more source

Fluorinative Olefin Bond Functionalization of Selected Functionalized Cycloalkenes

Israel Journal of Chemistry, Volume 66, Issue 4, July 2026.
Palladium‐catalyzed ring olefin bond difunctionalization, through functional group and substrate‐dependent arylfluorination, of selected functionalized cycloalkenes has been studied. Palladium‐catalyzed ring olefin bond difunctionalization through arylfluorination of selected five‐, six‐, and seven‐membered functionalized cycloalkenes has been studied.
Tamás T. Novák, Tamás Holczbauer, Máté Sulyok‐Eiler, Pál T. Szabó, Melinda Nonn, Gábor Turczel, Anas Semghouli, Santos Fustero, Jianlin Han, Gábor Hornyánszky, Loránd Kiss   +10 more
wiley   +1 more source

Self‐assembly and Lateral Cobalt Coordination of a Fivefold Symmetric Cyanostar Macrocycle on an Au(111) Surface

Chemistry – A European Journal, Volume 32, Issue 24, 23 June 2026.
Herein, we report the first example of the formation of a close‐packed, regular 2D monolayer of a fivefold symmetric cyanostar macrocycle on an Au(111) surface under ultra‐high vacuum and the structural modification of such self‐assembled architecture upon cobalt atom deposition.
Lenka Černá, Miguel Martínez García, Shanmugasibi K. Mathialagan, Sofía O. Parreiras, Koen Lauwaet, José Ignacio Urgel, Aurelio Gallardo, Amar H. Flood, Tomás Torres, José M. Gallego, Giovanni Bottari, David Écija   +11 more
wiley   +1 more source

Activation of Aryl Halides by Triplet–Triplet Annihilation Upconversion Enabling Coupling Processes Under an Open‐to‐Air Environment

European Journal of Organic Chemistry, Volume 29, Issue 24, 23 June 2026.
Triplet–triplet annihilation upconversion (TTA‐UC) performed inside supramolecular viscoelastic gels enables efficient CC and C–heteroatom coupling reactions under green LED irradiation in open‐air conditions. The gel network restricts oxygen diffusion, preserves triplet states, and allows aryl halide activation through upconverted excited states ...
Daniel Álvarez‐Gutiérrez, Paola Domínguez Domínguez, M. Consuelo Jiménez, David Díaz Díaz, Raúl Pérez‐Ruiz   +4 more
wiley   +1 more source

Xanthone and Flavone Derivatives as Dual Agents with Acetylcholinesterase Inhibition and Antioxidant Activity as Potential Anti-Alzheimer Agents

Journal of Chemistry, 2017
Alzheimer’s disease (AD) is a multifactorial neurodegenerative disorder that is associated with the elderly. The current therapy that is used to treat AD is based mainly on the administration of acetylcholinesterase (AChE) inhibitors.
Inês Cruz, Ploenthip Puthongking, Sara Cravo, Andreia Palmeira, Honorina Cidade, Madalena Pinto, Emília Sousa   +6 more
doaj   +1 more source

Thiazolidinones: novel insights from microwave synthesis, computational studies, and potentially bioactive hybrids

Beilstein Journal of Organic Chemistry
Various 5-arylidene derivatives were prepared via a Knoevenagel condensation-type reaction of aromatic/heteroaromatic aldehydes with rhodanine or thiazolidine-2,4-dione (TZD) catalyzed by EDA/AcOH under microwave heating.
Luan A. Martinho, Victor H. J. G. Praciano, Guilherme D. R. Matos, Claudia C. Gatto, Carlos Kleber Z. Andrade   +4 more
doaj   +1 more source