Results 1 to 10 of about 1,219 (135)

Induced-Fit Recognition by a Calixarene-Pyrene Conjugate for Single- and Dual-Wavelength Fluorescence Sensing in Water. [PDF]

Chemistry
A sulfonatocalix[4]arene–pyrene conjugate functions as a fluorescence chemosensor for the optical detection of biorelevant analytes in water. Its photoinduced electron transfer (PET) response is triggered by an induced‐fit recognition mechanism. Noncovalent assembly with an additional dye affords dual‐color ratiometric signaling via competitive PET ...
Martins JN, Pessêgo M, Garcia-Rio L, Lima JC, Basílio N.   +4 more
europepmc   +2 more sources

Complex History of Organellar Introgression in <i>Nothofagus</i> Trees: Chloroplast and Mitochondrial Capture Facilitated by Natural Selection. [PDF]

Ecol Evol
Field photograph of an ancient Nothofagus tree covered with epiphytic lichens in the Patagonian temperate rainforest. This genus serves as a key model for investigating organellar introgression and evolutionary genomics in South America. ABSTRACT Hybridization is widespread across diverse groups of organisms, and in some cases, organellar genomes of ...
Narváez G, Guillemin ML, Sepúlveda-Espinoza F, Noll D, Gutiérrez RA, Arana V, Bellora N, Cubillos FA, Vianna JA.   +8 more
europepmc   +2 more sources

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

ChemistryEurope
Arginine‐rich peptides and arginine‐rich motifs in proteins are important sensing targets owing to their critical role in several biological processes.
Joana N. Martins, Márcia Pessêgo, Lucia Méndez‐Gómez, Hanieh Mahmoodi, Javier Montenegro, Luis Garcia‐Rio, João Carlos Lima, Nuno Basílio   +7 more
doaj   +2 more sources

Photoactivated cell-killing amino-based flavylium compounds

Scientific Reports, 2021
Photodynamic therapy (PDT) is a well-established therapeutic for the treatment of different diseases. The growing interest of this technique required the development of new photosensitizers with better photo-features.
Hélder Oliveira, Paula Araújo, Ana Rita Pereira, Nuno Mateus, Victor de Freitas, Joana Oliveira, Iva Fernandes   +6 more
doaj   +1 more source

How Insertion of a Single Tryptophan in the N-Terminus of a Cecropin A-Melittin Hybrid Peptide Changes Its Antimicrobial and Biophysical Profile

Membranes, 2021
In the era of antibiotic resistance, there is an urgent need for efficient antibiotic therapies to fight bacterial infections. Cationic antimicrobial peptides (CAMP) are promising lead compounds given their membrane-targeted mechanism of action, and high
Ana Rita Ferreira, Cátia Teixeira, Carla F. Sousa, Lucinda J. Bessa, Paula Gomes, Paula Gameiro   +5 more
doaj   +1 more source

A Experimentação na Educação em Química Verde: uma Análise de Propostas Didáticas Desenvolvidas por Licenciandos em Química de uma IES Federal Paulista

Revista Brasileira de Pesquisa em Educação em Ciências, 2021
Este trabalho busca analisar a inserção dos Princípios da Educação em Química Verde (EQV) nas propostas experimentais desenvolvidas pelos estudantes na disciplina de Experimentação na Educação Química do curso de Licenciatura em Química de uma ...
Rosivânia Silva Andrade, Vânia Gomes Zuin   +1 more
doaj   +1 more source

Química Ambiental e Química Verde no conjunto do conhecimento químico: concepções de alunos de graduação em Química da Universidade de São Paulo

Educación Química, 2018
Este trabajo investiga las concepciones de los alumnos de la carrera de Química de la Universidad de Sao Paulo respecto al estatus de la Química Ambiental y la Química Verde con relación al conjunto del conocimiento químico.
Paulo Alves Porto, Paola Corio, Flavio A. Maximiano, Carmen Fernandez   +3 more
doaj   +1 more source

Topical Delivery of Niacinamide to Skin Using Hybrid Nanogels Enhances Photoprotection Effect

Pharmaceutics, 2021
Niacinamide (NIA) has been widely used in halting the features of ageing by acting as an antioxidant and preventing dehydration. NIA’s physicochemical properties suggest difficulties in surpassing the barrier imposed by the stratum corneum layer to reach
Renata Basto, Raquel Andrade, Cláudia Nunes, Sofia A. Costa Lima, Salette Reis   +4 more
doaj   +1 more source

Functionalization of 7-Hydroxy-pyranoflavylium: Synthesis of New Dyes with Extended Chromatic Stability

Molecules, 2022
This work reports the functionalization of pyranoflavyliums pigment using 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride coupling chemistry.
Ana Rita Pereira, Victor de Freitas, Nuno Mateus, Joana Oliveira   +3 more
doaj   +1 more source

QUÍMICA VERDE: UN NUEVO RETO

Ciencia e Ingeniería Neogranadina, 2011
En la actualidad, existe un enorme deterioro del medio ambiente que ha generado la necesidad de buscar alternativas que conduzcan a la sostenibilidad ambiental.
Nerlis Paola Pájaro Castro, Jesús Tadeo Olivero Verbel   +1 more
doaj   +3 more sources