Results 31 to 40 of about 223,084 (211)

Biosurfactant production by Pseudomonas aeruginosa isolated from mining waste: From genomic analysis to development of a polymeric composite for removal of hexavalent chromium

Polymer International, EarlyView.
Biosurfactant was produced by Pseudomonas aeruginosa using andiroba waste from Amazonia. A biosurfactant–alginate composite (Alg/BioS) was successfully synthesized via ionotropic gelation, and achieved up to 70% Cr6+ removal from water. Abstract Environmental contamination by heavy metals represents a significant challenge due to their persistence in ...
Paulo Diniz Austriaco, Emilly Cruz da Silva, Glenda Sores Gomes, Joane Almeida Alves, Amanda Vidal, Leandro Argolo, Rafaela Ribeiro, Luciana Souza, José Augusto Pires Bitencourt, Leonardo Brasil Felipe, Leonie Asfora Sarubbo, Sidnei Cerqueira dos Santos   +11 more
wiley   +1 more source

Assessment of the Interaction between Ammonium Dinitramide and Isocyanurate Bonding Agents for Application on Technologies of Composite Solid Propellants

Propellants, Explosives, Pyrotechnics, EarlyView.
This work investigates the interaction of two isocyanurate‐based bonding agents with ammonium dinitramide: triallyl isocyanurate and 1,3,5‐tris(2‐hydroxyethyl) isocyanurate, which contain alkene and hydroxyl functional groups in their side chains, respectively.
Jessica O. Silva, Josiane R. C. Silva, Kamila P. Cardoso, Milton F. Diniz, Márcio Y. Nagamachi, Luiz F. A. Ferrão   +5 more
wiley   +1 more source

Del filo de la navaja a la cáscara de nuez: un nuevo examen de la dinámica de Harrod

Revista de Economía Institucional, 2005
El programa de investigación de Harrod fue uno de los primeros esfuerzos por integrar las ideas centrales de la “dinámica magna” en un esquema mecánico de fuerzas vectoriales que explicara los fenómenos del ciclo y el crecimiento de manera endógena.
Álvaro M. Moreno Rivas
doaj   +2 more sources

Sistema de actividades de dinámica no lineal en un curso inicial de Mecánica

Revista Iberoamericana de Educación, 2015
Un aspecto esencial en la enseñanza de la física es la búsqueda de vías para familiarizar a los estudiantes con temas de actualidad. Uno de esos temas es el de Dinámica No Lineal, de gran interés en múltiples campos de la ciencia y la tecnología.
Pablo Valdés Castro
doaj   +1 more source

Validación experimental de un modelo de músculo activado de forma artificial [PDF]

, 2014
Postprint (published ...
Alonso, Francisco Javier, Cuadrado Aranda, Javier, Font Llagunes, Josep Maria, Lugrís Armesto, Urbano, Melo, P. Luzio, Romero, Francisco   +5 more
core  

Retrospective image analysis for long‐term demography using Google Earth imagery

Remote Sensing in Ecology and Conservation, EarlyView.
We demonstrate that high‐resolution Google Earth imagery, combined with minimal field validation, enables retrospective tracking of individual invasive plants. The image shows one of the monitored individuals of Opuntia sp. in Greece. Our approach reveals long‐term demographic patterns, recruitment dynamics, and spatial expansion without continuous ...
Erola Fenollosa, Garrett Cohen, Roberto Salguero‐Gómez   +2 more
wiley   +1 more source

Comportamiento dinámico de puentes en arco con amortiguadores viscosos [PDF]

, 2007
En éste trabajo se presenta la respuesta sísmica analítica de dos puentes en arco de gran luz, sometiéndolos a un movimiento simulado que incluye efectos de fuente cercana.
José de Jesús Álvarez Sereno, Nicolás Parra García, Ángel C. Aparicio Bengoechea   +2 more
core  

The Employment of Hydrogen Peroxide in Water Disinfection Poses a Threat to Aquatic Ecosystems Because of Its Toxicity to Nontarget Organisms

Environmental Toxicology, EarlyView.
ABSTRACT Hydrogen peroxide is widely used in water and wastewater treatment, particularly in advanced oxidation processes that aid in the degradation of compounds and microbial disinfection. Despite concerns about potential environmental contamination, its impact on freshwater ecosystems remains inadequately studied.
Letícia Queiroz Almeida, Thayrine Dias Carlos, Leydiane Barbosa Bezerra, Rone S. Barbosa, Nelson Luís Gonçalves Dias Souza, Douglas Henrique Pereira, Renato Almeida Sarmento, Grasiele Soares Cavallini   +7 more
wiley   +1 more source

Filtro activo para la mejora de la eficiencia energética en instalaciones eléctricas [PDF]

, 2009
El Dpto. de Energía Eléctrica de la Universidad Carlos III de Madrid ha diseñado un prototipo de filtro activo para compensar las perturbaciones que produce en la señal una carga no lineal.
Amarís Duarte, Hortensia Elena, Robles Muñoz, Guillermo   +1 more
core   +1 more source

How vulnerable are amphibians to climate change? A mechanistic perspective

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Amphibians are frequently identified as highly vulnerable to climate change, yet the mechanisms driving this sensitivity remain uncertain. Approaches that explicitly link physiological mechanisms to environmental variation provide powerful tools for forecasting climate ...
Eric A. Riddell, David R. Adams, Molly C. Womack   +2 more
wiley   +1 more source