Results 1 to 10 of about 160,926 (174)

The Future of Sustainable Packaging: Exploring Biodegradable Solutions Through Extrusion, Thermo-Expansion, 3D Printing and Supercritical Fluid from Agro-Industry Waste [PDF]

Foods
Due to environmental disasters caused by the use of plastic packaging, particularly expanded polystyrene (EPS), there is an urgent need to identify sustainable alternatives.
Lacan S. Rabelo, Fabrício C. Tanaka, Sidney S. dos Santos, Fauze A. Aouada, Márcia R. de Moura   +4 more
doaj   +2 more sources

Grafting of L-proline and L-phenylalanine amino acids on kaolinite through synthesis catalyzed by boric acid

Applied Surface Science Advances, 2021
The amidation reaction catalyzed by boric acid between the amino acids proline and phenylalanine and the alkoxide 3-aminopropyltriethoxysilane was studied. Afterwards, the modified alkoxide was used to functionalize the clay mineral kaolinite. The hybrid
Denis T. de Araújo, Katia J. Ciuffi, Eduardo J. Nassar, Miguel A. Vicente, Raquel Trujillano, Vicente Rives, Elena P. Bernal, Emerson H. de Faria   +7 more
doaj   +1 more source

α and γ Alumina Spheres for Azo Dye (Allura Red) Removal from Aqueous Media

Adsorption Science & Technology, 2022
Allura red or Red 40 (R40) is a dye widely used in the food, textile, and pharmaceutical industries; it is considered dangerous because it is soluble in water, and it has high toxicity and resistance to natural degradation.
Jonatan Torres-Pérez, Nahum Medellín-Castillo, Simón Yobanny Reyes-López   +2 more
doaj   +1 more source

Synthesis and characterization of nickel complexes derived from Schiff-Bases

Orbital: The Electronic Journal of Chemistry, 2012
Aromatic Schiff-Bases constitute a large class of organic compounds containing the imine group (C=N) [1-3]. 2-hydroxybenzaldehyde (salicylaldehyde) which has been frequently used for the synthesis of aromatic Schiff-Bases, it has many biological ...
Mirian Y. Matsumoto, Keila B. Dias, Vicente L. Kupfer, Elias B. O. Filho, Larisse G. Salazar, Adalberto V. Mezacasa, Persiely P. Rosa, Nelson Luis de Campos Domingues, Andrelson W. Rinaldi   +8 more
doaj   +1 more source

Inserção de catalisador híbrido na síntese de beta-tiocetonas

Orbital: The Electronic Journal of Chemistry, 2012
The Michael reaction (or Michael addition) involves the addition of a nucleophile, called Michael donor, to an electrophile (α,β-unsaturated), called Michael acceptor. Literature reports several types of nucleophiles applied in this reaction.
Mariana Pompilio Darbem, Andrelson Wellington Rinaldi, Nelson Luis C. Domingues   +2 more
doaj   +1 more source

Development of materials consisting of conjugated polymer doped with folic acid

Orbital: The Electronic Journal of Chemistry, 2012
The development of new materials made from the combination between conjugated polymers and new dopants is the objective of various researches groups around the world. This work presented the synthesis and characterization of Polyaniline (PAni) doped with
Vicente Kupfer, Carlos Roberto A. dos Santos, Mirian Y. Matsumoto, Keila B. Diasa, Nelson L. C. Domingues, Andrelson W. Rinaldi   +5 more
doaj   +1 more source

Produção de sementes macho-estéreis em arroz [PDF]

Pesquisa Agropecuária Brasileira, 2001
A obtenção comercial de sementes da linhagem macho-estéril é uma das limitações para viabilizar a produção de híbridos de arroz (Oryza sativa L.). Este trabalho buscou estudar três proporções entre a linhagem macho-estéril (linhagem A) e a mantenedora ...
Claudio Bragantini, Elcio Perpétuo Guimarães, Veridiano dos Anjos Cutrim   +2 more
doaj   +1 more source

Synthesis and characterization of the polyaniline dopant Schiff base

Orbital: The Electronic Journal of Chemistry, 2012
The Schiff base, N-salicilidenoanilina was used as dopant to induce polymerization of aniline and thus preparing polyaniline (PAni). The different conditions of preparation, including Schiff base structure, and the dosage of acidity reaction medium, were
Mirian Y. Matsumoto, Keila B. Dias, Vicente L. Kupfer, Nelson Luis de Campos Domingues, Andrelson W. Rinaldi, Persiely P. Rosa   +5 more
doaj   +1 more source

Produtividade de híbridos de milho na região de fronteira agrícola no nordeste do Maranhão. [PDF]

, 2018
O Maranhão é um estado onde a agricultura tecnificada está em rápida expansão e que possui excelente potencial para desenvolvimento do agronegócio e para a exportação de produtos agrícolas. No entanto, ainda é escassa a realização de pesquisas na região,
ARNHOLD, E., CARVALHO, H. W. L. de, OLIVEIRA JÚNIOR, E. A. de, PACHECO, C. A. P., SILVA, R. G.   +4 more
core   +1 more source

Synthesis of some derivatives of compounds β-aminoketonic through Mannich reaction by usingbiocatalysts

Orbital: The Electronic Journal of Chemistry, 2012
The Mannich reaction is one of the most widely used reactions in organic chemistry, and also one of the first examples of a multicomponent reaction already described on the literature.
Ana Claudia S. Lima, Érica Cristina da Silva, Paula Vanessa S. Rizzo, Mariana P. Darbem, Cristiane R. Winck, Andrelson W. Rinaldi, Nelson Luis de Campos Domingues   +6 more
doaj   +1 more source