Results 21 to 30 of about 9,842 (173)

CARACTERIZACIÓN FITOQUÍMICA DE FACTORES ANTINUTRICIONALES EN LAS HOJAS DE UVITO (Cordia dentata Poir) [PDF]

Revista Mvz Cordoba, 2009
Objetivo. Establecer factores antinutricionales en la biomasa de uvito (Cordia dentata Poir), y su valor nutricional e impacto en el bienestar animal, mediante experimentos de producción de gas. Materiales y Métodos. La recolección de hojas de C. dentata
Solange Sánchez, Beatriz Abadia, Rolando Barahona, Andrea E. Garcia   +3 more
doaj  

Decolorization of Ponceau Red 4R with TiO2/ZnO: Effect of calcination temperature and Fe addition

Environmental Progress &Sustainable Energy, EarlyView.
Abstract The photocatalytic degradation of azo dyes using semiconductor oxides has emerged as a promising strategy for wastewater remediation. In this study, pure, mixed, and Fe‐doped oxide catalysts based on Zinc Oxide and Titanium Dioxide were synthesized and evaluated for the degradation of Ponceau 4R under ultraviolet irradiation.
Stefani Castilhos, Fernado Manzotti de Souza, Giane Gonçalves Lenzi, Angelo Marcelo Tusset, Luiz Mario de M. Jorge, Onelia Aparecida Andreo dos Santos   +5 more
wiley   +1 more source

Concentraciones de nitrato en aguas superficiales y subterráneas de un fundo ganadero con manejo de purines en Cajamarca (Perú)

South Sustainability
Los purines son una mezcla líquida de heces, orina, agua de lavado y residuos orgánicos generados en los sistemas ganaderos que contienen nitrógeno orgánico y amoniacal, el cual puede transformarse en nitrato y movilizarse hacia aguas superficiales y ...
Rosa M. Idrugo , Fernando Oblitas, Luis Vargas-Rocha   +2 more
doaj   +1 more source

Incorporación de paja al suelo, inoculación con zinc a la semilla y fertilización con nitrógeno en trigo cultivado bajo condiciones de suelo

Terra Latinoamericana, 2022
En regiones con problemas de salinidad, la mejora continua de las propiedades físicas y químicas de los suelos, el incremento de los porcentajes de germinación de la semilla, así como el manejo de la nutrición mineral, deberían incrementar el rendimiento
Fidel Núñez-Ramírez, Raúl Leonel Grijalva-Contreras, Rubén Macías-Duarte, Blancka Yesenia Samaniego-Gámez, Isabel Escobosa-García, Onécimo Grimaldo-Juárez, Ángel Manuel Suárez-Hernández   +6 more
doaj   +1 more source

Avaliação das concentrações de nitratos na água subterrânea do município de Chapecó-SC [PDF]

, 2001
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro TecnológicoO nitrato é o poluente mais freqüente nas águas subterrâneas. Em concentrações superiores a 10 mg/l NO3-N, pode causar metahemoglobina e câncer.
Nicolai, Gilberto
core  

Purification and Properties of Polyvinyl Nitrate and Its Compatibility With Solid Oxidizers

Propellants, Explosives, Pyrotechnics, Volume 51, Issue 8, Page 1224-1234, August 2026.
ABSTRACT Polyvinyl nitrate (PVN) is a nitrate‐ester energetic binder that can be produced directly from polyvinyl alcohol—a cheap commodity feedstock—thereby offering potential cost and supply‐chain advantages over binders based on nitrocellulose and other specialty polymers.
Stephen Spice, Monica C. Chandwani, Carole A. Morrison, Colin R. Pulham   +3 more
wiley   +1 more source

Identifying the Thermodynamic Driving Force of Metal Extraction by Hydrophobic Eutectic Solvents

ChemSusChem, Volume 19, Issue 11, 15 June 2026.
Solvent extraction (SX) in hydrophobic eutectic solvent (HES) appears as an extension rather than a “revolution” of SX in common organic diluents for a given neutral extractant. A detailed thermodynamic and spectroscopic study shows that SX in HES imposes an enthalpic penalty but lowers the entropy cost of Eu3+ transfer, leading to enhanced metal ...
Inês C. M. Vaz, Maísa Saldanha Pinheiro, Felipe Olea, Luigi Cirillo, Giorgia Mannucci, Matteo Busato, Paola D’Angelo, Rui Santos, Margarida Bastos, Luís M. N. B. F. Santos, João A. P. Coutinho, Nicolas Schaeffer   +11 more
wiley   +1 more source

Determinación de acido nítrico y nitratos en partículas atmosféricas

Geofísica Internacional, 1986
Se realizaron muestreos simultáneos de ácido nítrico y nitratos en forma de partículas en las instalaciones de la Universidad Autónoma Metropolitana de Azcapotzalco.
Y. I. Falcón, J. E. Meza, T. V. Larson
doaj   +1 more source

Increasingly conservative N cycling in a wet tropical forest: Litter and stream N concentrations decline over 29 years despite surges from hurricanes

Journal of Ecology, Volume 113, Issue 9, Page 2476-2496, September 2025.
Conceptual model integrating short‐ and long‐term responses of N in litterfall and stream water in a wet tropical forest subject to hurricanes. Despite N surges following hurricanes, N cycling becomes more conservative in the absence of frequent hurricanes.
Heather E. Erickson, Grizelle González, William H. McDowell, Jody D. Potter   +3 more
wiley   +1 more source

Structural and Spectroscopic Trends in Alkali Tris(Acetato)Actinyl(VI) Complexes

European Journal of Inorganic Chemistry, Volume 28, Issue 19, July 12, 2025.
Alkali tris(acetato) actinyl(VI) complexes of different actinyls and identical alkali metals are mostly isostructural, showing a redshift in the symmetric actinyl stretch across the actinide series. With increasing alkali ionic radii, a progression to lower symmetry is observed that correlates with subtle changes in the electronic and vibrational ...
Julia Neumann, Emily R. Mikeska, Richard E. Wilson   +2 more
wiley   +1 more source