Results 11 to 20 of about 143,752 (166)

Modeling and tuning of glucose oxidase‐catalase system incorporating dissolved oxygen concentration

Journal of Chemical Technology &Biotechnology, Volume 98, Issue 6, Page 1520-1531, June 2023., 2023
Abstract BACKGROUND Gluconic acid production by a glucose oxidase (GOx) and catalase (CAT) system has been proposed. However, the bioprocess optimal design and operation are limited by the lack of kinetic models of GOx involving oxygen as substrate. Herein, the GOx‐CAT system is modeled considering a continuous oxygen supply at a bioreactor lab scale ...
Angela V. Ruales‐Salcedo, Oscar Andrés Prado‐Rubio, Javier Fontalvo, Juan Carlos Higuita, John M. Woodley   +4 more
wiley   +1 more source

Recovery of insular seabird populations years after rodent eradication

Conservation Biology, Volume 37, Issue 3, June 2023., 2023
Abstract Seabirds have been particularly affected by invasive non‐native species, which has led to the implementation of numerous eradication campaigns for the conservation of these keystone and highly vulnerable species. Although the benefits of eradication of invasive non‐native species for seabird conservation have been demonstrated, the recovery ...
Martin Philippe‐Lesaffre, Martin Thibault, Stephane Caut, Karen Bourgeois, Tristan Berr, Andreas Ravache, Eric Vidal, Franck Courchamp, Elsa Bonnaud   +8 more
wiley   +1 more source

UNDERSTANDING GRAY ZONE WARFARE FROM MULTIPLE PERSPECTIVES

World Affairs, Volume 186, Issue 1, Page 81-104, Spring 2023., 2023
This study examines the dynamics of gray zone warfare by analyzing its conceptualization in the literature and through its practice in several recent examples. Ever‐increasing changes in the characteristics of contemporary warfare have complicated the security environment of the 21st century.
Tahir Mahmood Azad, Muhammad Waqas Haider, Muhammad Sadiq   +2 more
wiley   +1 more source

Fluorescence Intensity Ratio‐based temperature sensor with single Nd3 + :Y2O3 nanoparticles: Experiment and theoretical modeling

Nano Select, Volume 2, Issue 2, Page 346-356, February 2021., 2021
A thermometer based on single Nd3 + :Y2O3 nanoparticles is reported. It relies on the ratio of thermally coupled Nd3 + emission lines accessible by continuous‐wave upconversion under 880 nm or downconversion under 532 nm. The rate equation analysis lead to results that nicely agree with the experimental data. The system showed a relative sensitivity up
Rodrigo Galvão, Luiz F. dos Santos, Rogéria R. Gonçalves, Leonardo de S. Menezes   +3 more
wiley   +1 more source

Percutaneous radiofrequency‐assisted liver partition versus portal vein embolization before hepatectomy for perihilar cholangiocarcinoma

BJS Open, Volume 4, Issue 1, Page 101-108, February 2020., 2020
Percutaneous radiofrequency‐assisted liver partition with portal vein embolization in staged liver resection (PRALPPS), modIfied ALPPS with reduced surgical trauma on the first stage, was used in 11 patients with perihilar cholangiocarcinoma. PRALPPS did not differ from portal vein embolization (PVE) in terms of morbidity or mortality.
O. Melekhina, M. Efanov, R. Alikhanov, V. Tsvirkun, Y. Kulezneva, I. Kazakov, A. Vankovich, A. Koroleva, I. Khatkov   +8 more
wiley   +1 more source

PREPARACIÓN Y CARACTERIZACIÓN DE CARBONES ACTIVADOS A PARTIR DE UN CARBÓN MINERAL DE LA CUENCA DEL CESAR (Colombia)

Revista Politécnica, 2018
En este trabajo se prepararon carbones activados a partir de un carbón bituminoso, mediante procesos de activación física y química. La activación física con vapor de agua (H2O) se realizó a temperaturas de 700 y 800°C y la activación química utilizando ...
Lina Mercedes Daza Barranco, Juan Fernando Orrego Miranda, Jorge Luis Piñeres Mendoza , Jhon Jairo Fernández Hincapie   +3 more
doaj   +1 more source

Síntesis y caracterización de la zeolita Beta [PDF]

Avances en Química, 2012
Beta zeolite is normally obtained with Si/Al 5 and infinity ratios, using tetraethylammonium (TEA) as templante. Important parameters in the TEA-Beta synthesis are alkali cation concentration, the type of cation used, the concentration of hydroxide, and
Mahiceth Quintero, Manuel Perez, Hildemaro Meléndez, Jairo Rondon, Freddy Imbert   +4 more
doaj  

Modelos para ajuste da produção de gases em silagens de girassol e milho Models for fit of gas production in sunflower and corn silages

Pesquisa Agropecuária Brasileira, 2008
O objetivo deste trabalho foi identificar entre os modelos Brody, Von Bertalanffy, Gompertz, France, Logístico, Logístico modificado e Logístico bicompartimental, aquele que apresenta maior qualidade de ajuste à curva de produção cumulativa de gases em ...
Renius Mello, André Luiz Rodrigues Magalhães, Fernanda Cristina Breda, Adair José Regazzi   +3 more
doaj   +1 more source

Estudio experimental de la alteración de la mojabilidad mediante el uso de un surfactante extraído del aceite del pino TOFA en el sistema crudo liviano/agua/SiO2 [PDF]

Avances en Química, 2012
It is known that much of the oil is trapped in reservoirs after use of conventional methods for oil extraction. However, several methods have been introduced to increase the recovery of this oil, one of them is through the alteration of the wettability.
Hildemaro Meléndez, Jairo Rondón, Marbelia Cabrera, Edder Garcia, Claudio Lugo, Cleodaris Rivas   +5 more
doaj  

Pardeamiento de zumos clarificados de limón tratados a altas temperaturas

Scientia Agropecuaria, 2010
En este trabajo se presenta un estudio del efecto del tratamiento a altas temperaturas (70, 80, 90 y 95oC) sobre la evolución del color de zumos clarificados de limón de 10, 20, 35, 50 y 64.6oBrix.
Raquel Ibarz-Martínez, Jordi Pagán, Salvador Garza, Abert Ibarz   +3 more
doaj   +1 more source