Results 91 to 100 of about 91,095 (298)

Effect of Carboxymethyl Chitosan and Genipin on the Structural, Water Uptake, and Thermomechanical Properties of Zein‐Based Biodegradable Materials

Journal of Applied Polymer Science, EarlyView.
The effects of carboxymethyl chitosan and genipin on zein‐based biodegradable materials have been investigated. The addition of these compounds alters the material's structure, water absorption, and thermomechanical behavior, while genipin enhances mechanical performance through the formation of polymer networks.
Fahimeh Alsadat‐Seyedbokaei, Carlos Bengoechea, Manuel Felix   +2 more
wiley   +1 more source

Conductive PMMA/rGO Microfibers via Solution Blow Spinning: Role of Fiber Architecture on Electrical Transport

Journal of Applied Polymer Science, EarlyView.
A multidisciplinary characterization approach combining microscopy, tomography, spectroscopy, and electrical measurements reveals how fiber architecture and network connectivity govern electrical transport in PMMA/rGO microfibers by solution blow spinning.
Clarissa de Paula Dias, Mostafa Gamal, Bruno Sousa da Cunha, Santiago Bermudez, Rafael Travincas, Sérgio Neves Monteiro, Henry Colorado, Édio Pereira Lima Júnior, Carlos E. Castano   +8 more
wiley   +1 more source

Estudo de novas técnicas de extracção de aromas em resíduos florestais

, 2001
Estágio realizado na Alquimica Quimica Indústrial, LdaRelatório de estágio curricular da LEQ 2000/2001A data do relatório foi associada ao ano de finalização do curso por parte da aluna, visto que a mesma não se encontrava explícita no ...
Sousa, Ana Sílvia Guimarães Granadeiro Cortesão de
core   +1 more source

Development of Biocatalysts Based on Lipase B From Candida antarctica Immobilized on Magnetic Poly(Styrene‐Co‐Divinylbenzene) for Application in Esterification Reactions

Journal of Applied Polymer Science, EarlyView.
Magnetic biocatalysts can be recovered from high‐viscosity reaction media, such as those used in esterification, via magnetic attraction, thereby streamlining the bioprocess and reducing costs. This work builds on prior studies by providing additional data on how particle morphology influences immobilization parameters and by further exploring ...
Sabrina S. Teixeira, Luís A. C. Romero‐Silva, Ezaine C. C. Torquato, Manoel R. da Silva, Marcos A. S. Costa, Evelin A. Manoel, Eliane P. Cipolatti, Luciana C. Costa   +7 more
wiley   +1 more source

PARFOR QUIMICA

, 2018
O presente trabalho buscou identificar e discutir alguns aspectos explorados nas aulas de Libras e suas implicações para o ensino e a aprendizagem de Química haja vista o material digital produzido por Benassi e Duarte (2016). Assim optou-se pela abordagem qualitativa, alinhada à técnica de Análise de Conteúdo, tendo como base os estudos de Silveira ...
openaire   +1 more source

Zn/Al‐NO3 Layered Double Hydroxide as Alternative Activator for Nitrile Rubber Vulcanization: Effect of the Accelerator‐to‐Sulfur Ratio on Curing Kinetics and Network Properties

Journal of Applied Polymer Science, EarlyView.
Zn/Al‐NO3 layered double hydroxide offers a low‐zinc alternative for sulfur vulcanization of nitrile rubber, reducing nominal zinc loading by an estimated 71%. Its potential as a vulcanization activator depends on the curing system: conventional curing preserves tensile strength despite slower kinetics, whereas efficient curing maintains comparable ...
Lucas Castro Roza de Faria, Marcus Vinícius Alves Sampaio de Souza, Antonio Renato Bigansolli, Paulo Jansen de Oliveira, Fernanda Cristina Fernandes Braga, Marcelo Ferreira Leão de Oliveira, Carolina Guedes Fioravante Rezende, Marcia Gomes de Oliveira, Danieli Martins do Carmo   +8 more
wiley   +1 more source

Colorimetric determination of atmospheric nitrogen dioxide using preconcentration on C-18 cartridge

, 2002
An alternative analytical method for nitrogen dioxide (NO2) in atmosphere was developed. The collection of NO2 is performed by a Sep-Pack C-18 cartridge impregnated with 11% (v/v) of triethanolamine plus 3,6 % (v/v) of ethylene glycol plus 25 % (v/v) of ...
Ugucione, Cássia [UNESP], Gomes Neto, José de Anchieta [UNESP], Cardoso, Arnaldo Alves [UNESP]   +2 more
core  

Redescription of †Eobrasilia coutoi (Metatheria: Polydolopimorphia), a unique sclerocarpophagous metatherian from the Palaeogene of South America: Systematic affinities, and paleoecological and evolutionary implications

The Anatomical Record, EarlyView.
Abstract The ‘Palaeogene strata’ of the Itaboraí Basin (upper Paleocene‐lower Eocene), Southeastern Brazil, has preserved 29 genera and almost 50 species of metatherians (about 65% of its mammalian diversity). Among them, Eobrasilia coutoi Simpson, 1947 is the most enigmatic due to its quite fragmentary nature.
Leonardo M. Carneiro, Hugo Bampi, Ana C. Bernardes‐Dias, Lidiane Asevedo, João P. P. Araújo, Matheus R. Arêas, Alessandra S. Machado, Ricardo T. Lopes, Rafael C. Silva, Marina B. Soares, Gustavo R. Oliveira   +10 more
wiley   +1 more source

Biobased Sunflower Stalk Matrix for Lipase Stabilization via Physical Adsorption

Biotechnology and Applied Biochemistry, EarlyView.
ABSTRACT The search for sustainable, cost‐effective biocatalytic processes has driven efforts to develop low‐cost supports for enzyme immobilization. Lignocellulosic residues have received particular attention due to their abundance, renewability, and structural properties.
Jaci L. Vilanova Neta, Larissa O. Jesus, Sande A. S. Costa, Edélvio B. Gomes, Rita C. M. Miranda, Daniel P. Silva, Denise S. Ruzene, Cleide M. F. Soares, Álvaro S. Lima   +8 more
wiley   +1 more source

Determinação de compostos prioritários em efluentes líquidos

, 2001
Estágio realizado na Alquimica Quimica Indústrial, LdaRelatório de estágio curricular da LEQ 2000/2001A data do relatório foi associada à data de finalização do curso por parte da autora, visto que a mesma não se encontrava explícita no ...
Ferreira, Ana Luísa de Almeida
core   +1 more source