Results 41 to 50 of about 1,947,881 (147)

Morphological, Structural, and Thermal Properties of Microbial Carotenoids Microencapsulated by Spray‐Drying Using Different Combinations of Wall Materials

Journal of Food Science, Volume 91, Issue 4, April 2026.
ABSTRACT This study evaluated the spray‐drying encapsulation of carotenoid‐rich extracts produced by Sporidiobolus salmonicolor, with the optimization of a ternary wall system of gum arabic (GA), inulin (IN), and corn starch (ST). Carotenoids were produced in a semi‐continuous bioreactor, extracted with organic solvents, and microencapsulated by spray ...
Patrícia Griep, Rosicler Colet, Elton Franceschi, Clarice Steffens, Jamile Zeni, Eunice Valduga   +5 more
wiley   +1 more source

Caracterização termogravimétrica e espectroscópica das propriedades ácidas da zeólita ZSM-22 Thermogravimetric and spectroscopic characterization of acidic properties of ZSM-22 zeolite

Cerâmica, 2010
A acidez da estrutura da zeólita ZSM-22 foi determinada por análise térmica. A energia de ativação, calculada pelo método de Ozawa, envolveu uma energia de termodecomposição de 18,44 kJ.mol-1. O valor do fator pré-exponencial A foi de 2,2746.
A. R. Loiola, J. C. R. de A. Andrade, J. M. Sasaki, L. R. D. da Silva, E. J. Nassar   +4 more
doaj   +1 more source

Chemical Constituents and Biological Activities of Oxandra (Annonaceae): A Review

Chemistry &Biodiversity, Volume 23, Issue 1, January 2026.
ABSTRACT Oxandra (Annonaceae) comprises 29 species distributed across South and Central America. Despite this diversity, the genus remains under‐investigated. This study presents the first comprehensive review of the chemical composition and biological activities of Oxandra species, utilizing databases such as SciFinder, ScienceDirect, PubMed, and ...
Rayssa Cota Lopes, Francisco Paiva Machado, Mateus de Freitas Brito, Thalisson Amorim de Souza, Lucas Silva Abreu   +4 more
wiley   +1 more source

Influência da temperatura de formação do íon de Keggin no processo de pilarização de esmectitas

Eclética Química, 2018
As amostras de esmectita do estado do Pará, Amazônia, Brasil foram caracterizados utilizando XRD, FTIR e análise textural por curvas isotérmicas adsorpition-desorption nitrogênio. Na produção das argilas pilarizadas foi usado o íon Al 13 (o íon de keggin)
D. L. Guerra, V. P. Lemos, E. F. Fernandes, R. S. Angélica, M. L. da Costa   +4 more
doaj   +1 more source

Molecular Identification of Yeasts Associated With Pineapple Fruit Collapse in the State of Alagoas, Brazil

Journal of Phytopathology, Volume 174, Issue 1, January/February 2026.
ABSTRACT Pineapple (Ananas comosus) is a tropical fruit, native to South America, of major economic importance in Brazil. In a producing area of Alagoas State, fruits at different ripening stages exhibited liquid exudation from the peel surface, often accompanied by the formation of gas bubbles.
Kevison Romulo da Silva França, Mayra Machado de Medeiros Ferro, Géssica Jacira Trindade Souza, Marcus Vinicius Santos da Silva, José Carlito Gonçalves de Medeiros, Iraildes Pereira Assunção, Gaus Silvestre de Andrade Lima, Gildemberg Amorim Leal‐Júnior, Adriano Márcio Freire Silva   +8 more
wiley   +1 more source

Solid Porous Materials for Selective Capture and Separation of Sulfur Hexafluoride (SF6)

ChemPlusChem, Volume 90, Issue 12, December 10, 2025.
The effective capture of sulfur hexafluoride (SF6), one of the most potent greenhouse gases, is a critical environmental challenge. This study evaluates porous materials—coconut shell‐derived activated carbons, a commercial activated carbon monolith, and a metal‐organic framework—for capturing SF6.
Julio E. Sosa, Rui P. P. L. Ribeiro, Srdana Kolakovic, Inês Matos, Maria Bernardo, José P. B. Mota, João M. M. Araújo, Ana B. Pereiro   +7 more
wiley   +1 more source

Comparison Between Portable and Bench‐Top Near‐Infrared Spectroscopy for Corn Silage Characterization Using Partial Least Square and Support Vector Regression Methods

Journal of Chemometrics, Volume 39, Issue 10, October 2025.
ABSTRACT In this work, bench‐top and portable near‐infrared (NIR) spectroscopy equipment are compared in the context of generating predictive models for the quantification of phosphorus (P), potassium (K), and nitrogen (N) components from corn silage samples.
Jefferson Tales Oliva, Vinicius Herique Kieling, Felipe Augusto Bueno Rossi, Erick Oliveira Rodrigues, Giovanni Alfredo Guarneri, Larissa Macedo dos Santos Tonial   +5 more
wiley   +1 more source

Iron and aluminum forms and their relationship with texture, mineralogy and organic carbon in the Cerrado Oxisol
Formas de ferro e alumínio e suas relações com textura, mineralogia e carbono orgânico em Latossolos do Cerrado

Semina: Ciências Agrárias, 2011
The Oxisols of the Cerrado region have a simple mineralogy, and are composed mainly of kaolinite and iron and aluminium oxides. The aim of this work was to perform a sequential extraction of iron and aluminium and to relate them to texture, mineralogy ...
Robélio Lenadro Marchão, Osmar Rodrigues Brito, Diogo Néia Eberhardt, Pedro Rodolfo Siqueira Vendrame, Cécile Quantin, Thierry Becquer   +5 more
doaj   +1 more source

From shake flasks to a bench‐scale bioreactor: scaling up exopolysaccharide production in fed‐batch cultivation of Ensifer meliloti SEMIA 135

Journal of Chemical Technology &Biotechnology, Volume 100, Issue 9, Page 1818-1830, September 2025.
Abstract BACKGROUND This study investigates the production scale‐up of exopolysaccharide (EPS) by Ensifer meliloti SEMIA 135 from shake flasks to a 5 L bench‐scale fed‐batch bioreactor. Soybean molasses was the cost‐effective nutrient source. The primary aim was to improve conditions for maximizing EPS yield and minimizing production costs.
Rui dos Santos Ferreira Filho, Janaína Fernandes de Medeiros Burkert, Carlos André Veiga Burkert   +2 more
wiley   +1 more source

Síntese da zeólita a partir de um caulim brasileiro termicamente ativado - DOI: 10.4025/actascitechnol.v25i1.2241

Acta Scientiarum: Technology, 2003
Um caulim brasileiro (paranaense) foi pré-tratado para sua utilização em síntese de zeólitas. O pré-tratamento consiste em uma ativação térmica do caulim.
Élida de Paula Moraes, Nádia Regina Camardo Fernandes Machado, Sibele Berenice Castellã Pergher   +2 more
doaj   +1 more source