Results 61 to 70 of about 5,247,884 (205)

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

Uso de um novo método de agitação para micro-extração em fase sólida - SPME - na determinação de fenóis em água [PDF]

, 2002
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Químca.Neste trabalho foi comparada a eficiência de três formas de agitação para a extração via SPME de um grupo de 11
Nome, Renata Cristiano
core  

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

Trace element speciation using solid phase microextraction

, 2005
An initial review of research targeting applications of solid phase microextraction for organometallic speciation, published in 2001, encompassed literature from the early days of solid phase microextraction up to June 2000.
Sturgeon, R., Mester, Z.
core   +1 more source

Vacuum-assisted headspace-solid phase microextraction of pesticides in grape samples

Advances in Sample Preparation
Vacuum-assisted headspace solid-phase microextraction (Vac-HS-SPME) could provide an alternative for extracting pesticides from grape samples. Vac-HS-SPME method is utilized to the simultaneous analysis of six pesticides from various classes, namely ...
Yerkanat Syrgabek, Mereke Alimzhanova, Saltanat Yegemova, Svetlana Batyrbekova   +3 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

Preparação de fibras de micro-extração em fase sólida recobertas com poli(dimetilsiloxano) por processo sol-gel: aplicação para determinação de btex em amostras aquosas [PDF]

, 2005
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Química.Neste trabalho foi explorado e comparado a utilização do suporte de vidro cerâmico frente ao suporte de fibra ...
Oliveira, Aline Fernandes de
core  

Trends in extraction and purification methods of Lignans in plant-derived foods

Food Chemistry: X
Lignans are widely used as dietary supplements within health foods. However, excess addition of lignans can induce adverse reactions, therefore, it is necessary to develop rapid, effective, economical, and environmentally friendly extraction and ...
Yu-tong Yang, Yuan Zhang, Yu Bian, Juan Zhu, Xue-song Feng   +4 more
doaj   +1 more source

Microextraction Techniques Coupled to Liquid Chromatography with Mass Spectrometry for the Determination of Organic Micropollutants in Environmental Water Samples

Molecules, 2014
Until recently, sample preparation was carried out using traditional techniques, such as liquid–liquid extraction (LLE), that use large volumes of organic solvents.
Mª Esther Torres Padrón, Cristina Afonso-Olivares, Zoraida Sosa-Ferrera, José Juan Santana-Rodríguez   +3 more
doaj   +1 more source

Volatile Compounds in Feathers of the Scarlet Macaw (Ara macao) Reflect Sex and Pair‐Bond Status

Integrative Zoology, EarlyView.
Scarlet macaws exhibit sex‐ and pair‐related differences in plumage volatile composition, with males showing greater chemical richness. Partnered individuals differ in specific compound classes, whereas no clear association with immune function was detected. These results support a potential role for olfactory cues in sexual and social communication in
Elisa Espartosa, Isabel Barja, José Martin, María del Carmen Hernández   +3 more
wiley   +1 more source