Results 91 to 100 of about 156,677 (249)

Development of an analytical model for the extraction of manganese from marine nodules [PDF]

, 2019
Multivariable analytical models provide a descriptive (albeit approximate) mathematical relationship between a set of independent variables and one or more dependent variables.
Castillo Segura, Jonathan Alejandro, Hernández Avendaño, Pía Carolina Andrea, Navarra Lafontaine, Alessandro, Saldaña Pino, Manuel, Toro Villarroel, Norman Rodrigo, Trigueros Tornero, Emilio   +5 more
core   +2 more sources

Chemical Profiling and Biological Activity of Copaiba Oil‐Resin Samples and Development of HPLC‐DAD Method for the Analysis of β‐Caryophyllene

Biomedical Chromatography, Volume 40, Issue 5, May 2026.
ABSTRACT The Copaifera species are traditionally used for their anti‐inflammatory, antiseptic and healing properties. The objective of this study was to compare the chromatographic profiles of seven samples of copaiba oil‐resin with respect to chromatographic and physicochemical properties and to evaluate their biological activities.
Gabriel de A. P. Graça, Cláudia G. Silva, Denise de O. Scoaris, Juliana Rodrigues de Vasconcelos, André Santos Alkimim, Vanessa C. F. Mosqueira, Luciana S. Salomon, Pietra Piotto Marcellini, Isabelle Renata Martins da Silva, Janete S. C. Santos, Andreia Fonseca Silva, Carolina P. S. Moreira, Júlio C. D. Lopes, Vera L. de Almeida   +13 more
wiley   +1 more source

Intra-regional classification of grape seeds produced in Mendoza province (Argentina) by multi-elemental analysis and chemometrics tools [PDF]

, 2018
The feasibility of the application of chemometric techniques associated with multi-element analysis for the classification of grape seeds according to their provenance vineyard soil was investigated.
Canizo, Brenda Vanina, Escudero, Leticia Belén, Pellerano, Roberto Gerardo, Pérez, María Belén, Wuilloud, Rodolfo German   +4 more
core   +1 more source

Catalytic Transfer Hydrogenation Reactions of Glycerol Over Zr‐Incorporated Zeolite Beta Prepared by a Mechanochemical Approach

ChemCatChem, Volume 18, Issue 9, 14 May 2026.
Metal‐modified beta zeolite has long been recognized as an important catalyst for reactions involving acid and bifunctional catalysis. The gas‐phase conversion of glycerol over Zr‐beta (prepared by a mechanochemical approach) demonstrated the remarkable versatility of this catalytic system, evidenced by the production of glycerol hydrogenolysis ...
Auguste Fernandes, M. Filipa Ribeiro, João P. Lourenço   +2 more
wiley   +1 more source

Application of an Activated Carbon-Based Support for Magnetic Solid Phase Extraction Followed by Spectrophotometric Determination of Tartrazine in Commercial Beverages

International Journal of Analytical Chemistry, 2015
A method is presented for magnetic solid phase extraction of tartrazine from nonalcoholic beverages. The method involves the extraction and clean-up by activated carbon covered with magnetite dispersed in the sample, followed by the magnetic isolation ...
José A. Rodríguez, Karen A. Escamilla-Lara, Alfredo Guevara-Lara, Jose M. Miranda, Ma. Elena Páez-Hernández   +4 more
doaj   +1 more source

Linking forest cover, soil erosion and mire hydrology to late-Holocene human activity and climate in NW Spain [PDF]

, 2014
This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 License (http://www.creativecommons.org/licenses/by-nc/3.0/) which permits non-commercial use, reproduction and distribution of the work without further ...
Aira Rodríguez MJ, Benito E, Carrión Y, Cheburkin AK, Clymo RS, Costa Casais M, FAO, Fægri K, García Salinas F, Goeury C, Grimm EC, Grimm EC, Innes JB, Martínez Cortizas A, Rochette Cordeiro AM, Siiriäinen A, Smith AG, Starkel L, Taboada Castro MT, Taboada Castro MT, Van Andel TH, Van Geel B, Van Geel B, Vánky K   +23 more
core   +1 more source

Curcumin Nanoformulations for Dermatological Applications: From Nutraceuticals to Nanocarriers

Food Frontiers, Volume 7, Issue 3, May 2026.
Nanotechnology‐based delivery platforms enhance the cutaneous administration of curcumin. Loading free curcumin into polymeric micelles, metal‐based nanoparticles, nanogels/hydrogels, liposomes, polymeric nanoparticles, or nanoemulsions/nanocrystals helps address its low solubility, poor stability and limited skin permeation. As a result, these systems
Stephany Celeste Gutiérrez‐Ruiz, Alejandra Romero‐Montero, Hector Hernández‐Parra, Sheila I. Peña‐Corona, Héctor Adrián García‐Gasca, Katya Carbone, Fabio Gervasi, Shivaprasad Shetty Mangalpady, Rajesh Kaverikana, Mariia Shanaida, Volodymyr Shanaida, Daniela Calina, Javad Sharifi‐Rad, Gerardo Leyva‐Gómez   +13 more
wiley   +1 more source

La erupción de El Charco de 1712 (Cumbre Vieja, La Palma). Nuevas aportaciones petrográficas y mineralógicas.

Geogaceta
La erupción volcánica de 1712, de El Charco, es una de las peor conocidas de las 8 erupciones históricas de la isla de La Palma. Fue un evento principalmente estromboliano, con fases hidromagmáticas, durante el cual se abrieron múltiples bocas a lo ...
Nicolás Chicharro, María José Huertas , Álvaro Márquez, Eumenio Ancochea   +3 more
doaj   +1 more source

Petrography, mineral chemistry and whole-chemistry studies from the Potrerillos Pluton and comparison with the Cerro La Gloria Pluton: arc and retroarc magmatism in the Early Carboniferous [PDF]

, 2015
Los plutones Potrerillos y Cerro La Gloria afloran, respectivamente, en el sur de la sierra de Toro Negro (Sierras Pampeanas occidentales) y en el flanco occidental de la sierra de Famatina.
Alasino, Pablo Horacio, Dahlquist, Juan Andres, Morales Camera, Matías Martín   +2 more
core  

Nutritional potential of bamboo leaves for feeding dairy cattle [PDF]

, 2019
Feed shortage during the dry season in the highlands of Madagascar negatively impacts the dairy cattle productivity, as well as the farmers' income. Bamboo can produce a high quantity of biomass and could be an alternative way to increase the fodder ...
Andriarimalala, José Herilalao, Durai, Jayraman, Kpomasse, Claude Cocou, Ralisoa, Noroseheno, Salgado, Paulo   +4 more
core   +4 more sources