Results 61 to 70 of about 37,813 (234)

Green Microextraction Techniques for the Determination of Cosmetic Ingredients and Contaminants

Analytica
The rapid growth and diversification of the cosmetic industry have led to increasingly complex formulations containing numerous bioactive ingredients, excipients, and synthetic additives, often delivered through advanced nanostructured systems.
Marianna Ntorkou, Christina Patakidou, Styliani Nisyriou, Constantinos K. Zacharis   +3 more
doaj   +1 more source

Development of Effervescent-assisted Liquid Phase Microextraction using 1-dodecanol for Determination of Ketoprofen Drug in Water

ASM Science Journal, 2020
A rapid and straightforward method based on effervescent-assisted dispersive liquid-liquid microextraction combined with high-performance liquid chromatography-ultraviolet (HPLC-UV) detection for preconcentration of ketoprofen in water samples was ...
Wan Mohd Afiq Wan Mohd Khalik
doaj   +1 more source

Wildfire Ash Alters Freshwater Crustacean Behavior: Disentangling the Contributions of Suspended Macroparticles and Ash‐Induced Alkalinization

Environmental Toxicology, EarlyView.
ABSTRACT Climate change and anthropogenic ignitions are intensifying wildfire frequency worldwide, elevating the risk of freshwater contamination by ash. In water, dissolved ash releases ions and other toxic constituents that increase pH and alter physicochemical conditions, while suspended ash particles may impose mechanical stress, disrupt behavior ...
Pétterson B. Pereira‐Silva, Diogo R. Pacheco, Gustavo Kirsch, Ronnilda M. G. Araujo, Bianca V. C. Oscar, William G. Matias, Sandro Santos, Bruno R. S. Figueiredo   +7 more
wiley   +1 more source

Imobilização térmica de poli(butil acrilato) em suportes de vidro cerâmico e sílica fundida para aplicação em micro-extração em fase sólida (SPME) [PDF]

, 2004
TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Físicas e Matemáticas. Curso de Química.A micro-extração em fase sólida (SPME) é uma técnica simples e eficiente de pré-concentração de amostras que elimina o uso de solventes ...
SOUZA, Michele Matos de
core  

Bioactive Profile, Antioxidant, and In Vitro Antimicrobial Activity of ‘Mortiño’ (Vaccinium meridionale) and Other Rubus and Vaccinium Andean Red Fruits at Different Stages of Ripeness

Antioxidants
This study evaluated changes in physicochemical characteristics, bioactive compounds, in vitro antioxidant activity, and antimicrobial activity during four ripening stages (M0%, M50%, M80%, and M100%) of ‘Castilla’ blackberry, ‘Buckingham Tayberry ...
Elena Coyago-Cruz, Gabriela Méndez, Ruth Escobar-Quiñonez, Gabriela Cisneros, Jorge Heredia-Moya   +4 more
doaj   +1 more source

Performance evaluation of a scent transfer unit for sampling of explosives and their residues to investigate nuisance alerts

Journal of Forensic Sciences, EarlyView.
Abstract Volatile organic compounds associated with explosives such as Composition C‐4 serve as important targets for canine training as well as field analysis. In parallel, 1‐bromooctane (1‐BO) is a benchmark to contextualize canine performance and aid interpretation of results.
Himanshi Upadhyaya, Alexis Hecker, John Goodpaster   +2 more
wiley   +1 more source

Desenvolvimento de métodos analíticos baseados em SPME para a determinação de herbicidas (alaclor, atrazina, propanil e pendimetalina) em aguas superficiais [PDF]

, 2007
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias. Programa de Pós-Graduação em Ciência dos Alimentos.O presente trabalho teve por objetivo o desenvolvimento de duas metodologias analíticas baseadas na técnica de ...
Costa, Léa Luzia Freitas
core  

Microextraction of Polycyclic Musks from Surface Water with Deep-Eutectic-Solvent-Coated Membrane Followed by Gas-Chromatography–Mass Spectrometry Analysis

Chemosensors
Deep eutectic solvents (DESs), a novel class of eco-friendly solvents, are attracting considerable attention in extraction techniques. In this study, a hydrophobic DES, created by combining a quaternary ammonium salt and hexanoic acid, was coated onto a ...
Fabiana Terlizzi, José O. Fernandes, Tamara Gonzalez, Mateus H. Petrarca, Leandro dos S. Silva, Rafaela S. Lamarca, Mario H. Gonzalez, Rui Lapa, Sara C. Cunha   +8 more
doaj   +1 more source

Stable flies preferentially oviposit on sites offering conspecific eggs with egg‐derived bacterial semiochemicals

Insect Science, EarlyView.
Stable flies preferentially oviposit on sites offering conspecific eggs with egg‐derived airborne semiochemicals. Egg‐borne bacterial symbionts, and Serratia marcescens in particular, produce odorants which attract gravid female flies and elicit oviposition.
Emmanuel Hung, Anya Gould, Stephanie Zaborniak, Caelen Watson, Regine Gries, Sukhmani Kaur, Kyra Stephens, Augustus Negraeff, Ryan Lam, Alpha Hui, Pantea Zamani, Aryan Monfared, Gerhard Gries   +12 more
wiley   +1 more source

Development of Zeolite Imidazole Framework-Based Adsorbent for Effective Microextraction and Preconcentration of Histamine in Food Samples

Foods
This study is the first to focus on the preconcentration and determination of histamine (HIS) in food samples using zeolite imidazole frameworks (ZIFs) on a solid-phase microextraction (SPME) platform.
Abdullah Khalid Omer, Hossein Tajik, Rahim Molaei, Mehran Moradi   +3 more
doaj   +1 more source