Results 61 to 70 of about 151,231 (182)

Oficinas pedagógicas: motivando e engajando estudantes de engenharia no estudo da química

Revista Principia, 2017
Este trabalho apresenta resultados da realização de oficinas didáticas extracurriculares cujo objetivo foi avaliar o impacto dessa estratégia na mobilização do interesse de estudantes de Engenharia pelas disciplinas de Química de seu currículo.
Valquíria Villas-Boas Gomes Missell, José Ricardo Ledur, Ivete Ana Schmitz Booth   +2 more
doaj   +1 more source

Extensional flow of Newtonian and Boger fluids through a flow focusing microdevice [PDF]

, 2011
This paper was presented at the 3rd Micro and Nano Flows Conference (MNF2011), which was held at the Makedonia Palace Hotel, Thessaloniki in Greece.
3rd Micro and Nano Flows Conference (MNF2011), Alves, MA, Oliveira, MSN, Pinho, FT   +3 more
core  

A Hanks‐type bacterial kinase, PknS, directly phosphorylates the alternative sigma factor EcfK to promote resistance to protist predation

The FEBS Journal, Volume 293, Issue 9, Page 2772-2793, May 2026.
The Xanthomonas citri Hanks‐type kinase PknS autophosphorylates and directly phosphorylates the alternative sigma factor EcfK at five residues. Besides the conserved residue T51 in the σ2 domain, phosphorylation of a residue in the linker between σ2 and σ4 is critical for EcfK activation by promoting its interaction with a positively charged pocket in ...
Lídia dos Passos Lima, Dev Sriranganadane, Daiane Laise da Silva, Natália C. Drebes Dörr, Enzo Breviglieri Sichi Mello, Caio Vinicius dos Reis, Rogério Ferreira Lourenço, José Felipe Teixeira da Silva Santos, Anita Salmazo, Brenno Wendler Miranda, Katlin B. Massirer, Rafael M. Couñago, Cristina E. Alvarez‐Martinez   +12 more
wiley   +1 more source

Influence of Hydroxypropyl-β-Cyclodextrin on the Photostability of Fungicide Pyrimethanil

International Journal of Photoenergy, 2014
Pesticides continue to play an important role in pest management. However, the intensive pesticide application has triggered several environment negative effects that cannot be disregarded.
Carlos Fernandes, Igor Encarnação, Alexandra Gaspar, Jorge Garrido, Fernanda Borges, E. Manuela Garrido   +5 more
doaj   +1 more source

3D‐Printed Geopolymer as a Basic Heterogeneous Catalyst for the Synthesis of α‐Cyanoacrylates Through the Knoevenagel Condensation

European Journal of Organic Chemistry, Volume 29, Issue 16, 25 April 2026.
3D‐printed geopolymers are presented as efficient and reusable heterogeneous catalysts for the Knoevenagel condensation. Under mild and green conditions, they promote the high‐yield synthesis of diverse α‐cyanoacrylates with remarkable stability and scalability.
Francesca T. Albino, Pedro A. M. Moro, Wanessa B. Menegaro, Luciano Senff, Marcus M. Sá, Dachamir Hotza   +5 more
wiley   +1 more source

Investigation of the Optical and Morphological Properties of PS/POMA Blends Hybridized With Erbium Oxide (Er2O3)

Journal of Applied Polymer Science, Volume 143, Issue 16, April 20, 2026.
ABSTRACT Polymeric blends (PB) represent a rapid and cost‐effective strategy for the development of materials with tailored properties. In this study, blends of polystyrene (PS) and poly(o‐methoxyaniline) (POMA) containing 7.5 wt/wt% of POMA were prepared and hybridized with erbium oxide (Er2O3) at concentrations of 0.5, 1.0, and 3.0 wt/wt%.
Ana Carolina Pires Martins, Patrick Brito, Letícia Nunes Coelho, Djalmir Nestor Messias, Nizamara Simenremis Pereira   +4 more
wiley   +1 more source

Tailored Dual Responsive Hybrid Gelatin Methacryloyl/Poly[2‐(Dimethylamino)Ethyl Methacrylate] Hydrogels for Efficient Ibuprofen Release in Topical Applications

Journal of Applied Polymer Science, Volume 143, Issue 15, April 15, 2026.
GelMA/DMAEMA hybrid hydrogels for release of ibuprofen. ABSTRACT In this study, biocompatible hydrogels intended for topical delivery of ibuprofen were synthesized from gelatin methacryloyl (GelMA) and 2‐(dimethylamino)ethyl methacrylate (DMAEMA) by varying their proportions. The impact of different GelMA and DMAEMA ratios was comprehensively evaluated
Guilherme Frey Schutz, Ana Luiza Assis Coutinho, Carolina Coli Zuliani, Ibsen Bellini Coimbra, Jéssica Heline Lopes da Fonseca, Marcos Akira d'Ávila, Ângela Maria Moraes, Roniérik Pioli Vieira   +7 more
wiley   +1 more source

AVALIAÇÃO DA EFICIÊNCIA DE DIFERENTES AGENTES COAGULANTES NA REMOÇÃO DE COR E TURBIDEZ EM EFLUENTE DE GALVANOPLASTIA

Eclética Química, 2018
In this work it was evaluated the efficiency of different coagulants agents in the process of coagulation/flocculation in the treatment of effluent from an electroplating industry.
Luiz Gustavo de Lima Vaz, Márcia Regina Fagundes Klen, Márcia Teresinha Veit, Edson Antonio da Silva, Tatiany Aparecida Barbiero, Rosângela Bergamasco   +5 more
doaj   +1 more source

Factores equipamento e madeira que influenciam a produção de aparas [PDF]

, 2008
Mestrado em Engenharia QuímicaO presente trabalho propõe-se abordar os factores de equipamento e de matéria-prima que influenciam a produção de aparas de madeira.
Reis, Joana Filipa Carvalho dos Reis
core  

Carbon Nanotubes‐Ionic Liquid Composite for Electrooxidation of Trimethoprim

Electroanalysis, Volume 38, Issue 4, April 2026.
Methodology employed for studying a new, simple, fast, and cost‐effective method for the identification and quantification of Trimethoprim in pharmaceutical tablets. It employs an electrochemical sensor based on a glassy carbon electrode modified with 4 h functionalized multiwalled carbon nanotubes, 1‐butyl‐3‐methylimidazolium hexafluorophosphate, and ...
João Vinícius Duarte Barbosa, Vitor Lima Mesquita, Raíssa Costa de Oliveira, Janevane Silva de Castro, Pedro de Lima‐Neto, Paulo Naftali da Silva Casciano, Cristiani Lopes Capistrano Gonçalves de Oliveira, Djenaine De Souza, Adriana Nunes Correia   +8 more
wiley   +1 more source