Results 71 to 80 of about 384,770 (213)

Quantification of polybrominated diphenyl ether (PBDE) congeners in wastewater by gas chromatography with electron capture detector (GC-ECD) [PDF]

, 2019
\ua9 2019 The Royal Society of Chemistry.This paper describes a gas chromatography coupled with an electron capture detector (GC-ECD) method that was developed for screening and reliable quantification of some selected PBDE congeners (BDE 28, 47, 99, 100,
Bowler B, Davenport RJ, Mrozik W, Dolfing J, Komolafe O   +4 more
core   +3 more sources

The Role of Stationary Phase Selection on Performance For Explosives Analysis Using GC-ECD [PDF]

Journal of Chromatographic Science, 2010
Gas chromatography with electron capture detection (GC-ECD) analysis of explosive-related nitro organic compounds was performed using four different column stationary phases with the focus being on their impact on analyte stability and transfer efficiency during analysis. All four columns used were 6 m x 0.53 mm, and the four stationary phases were a 1.
Roderick R, Kunz, Kerin E, Gregory, Dennis, Hardy   +2 more
openaire   +2 more sources

Spatial nitrogen attenuation supports near‐neutral air‐water N2O exchange in the Doñana marshes (SW Spain)

Limnology and Oceanography Letters, Volume 11, Issue 6, November 2026.
Abstract We present a 2‐year record (2016–2018) of dissolved N2O, CH4, and biogeochemical variables across the Doñana marshes (SW Spain). Nitrate concentrations declined by 91–98% from tidal creeks to flooded marshes, with the collapse of the nitrate/total dissolved nitrogen ratio across the salinity range being inconsistent with conservative dilution.
I. Emma Huertas, Mercedes de la Paz, Fiz F. Pérez, Gabriel Navarro, Susana Flecha   +4 more
wiley   +1 more source

First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique

Mass Spectrometry Reviews, Volume 45, Issue 6, Page 1064-1086, November/December 2026.
ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
wiley   +1 more source

BEES AS BIOINDICATORS TO GUARANTEE HEALTHY PRODUCTS FOR THE CONSUMER

Italian Journal of Food Safety, 2011
Many investigators have employed honeybees or honeybee products as tools for assessing environmental pollution in industrial areas. The pollution in northwest Italy by insecticides used in crop protection, heavy metals and radioactivity has been ...
B. Brusa, P. Guaraldo, A. Palma, G. Rinaldi, A. Rosso, P. Mogliotti   +5 more
doaj   +1 more source

Metabolic Screening and In Silico Investigation of Eucalyptus globulus Essential Oil Bioactives Against DENV‐2 Envelope Protein

ChemistryOpen, Volume 15, Issue 11, November 2026.
Network pharmacology and molecular docking identify bioactive compounds from Eucalyptus globulus essential oil with potential activity against dengue virus, highlighting 70 shared targets and DENV‐2‐associated pathways. Globulol and eucalyptol show strong binding to DENV‐2 receptors, with favorable drug‐likeness and toxicity profiles, supporting their ...
Arslan Afzal, Ilyas Ahmad, Mahadullah, Saliha Qamar, Tayyaba Yousaf, Faiz Ullah, Dilawar Khan, Mohammad Hamid Hamdard, Zia ur Rehman Mashwani   +8 more
wiley   +1 more source

Influência dos constituintes químicos dos extratos de diferentes matrizes na resposta cromatográfica de agrotóxicos Influence of the chemical constituents of extracts from different matrices in the pesticide chromatographic response

Química Nova, 2010
Multiresidue methods for pesticides monitoring by GC are commonly employed, however, it is well known that the presence of compounds of the matrix introduces errors during the quantiûcation.
Gevany Paulino de Pinho, Flaviano Oliveira Silvério, Antônio Augusto Neves, Maria Eliana L. R. Queiroz, Maria Antônia V. M. Starling   +4 more
doaj   +1 more source

Uncertainty Measurement of Chlorophenols and PCBs Analyzed in Aqueous Media by SPME-GC-ECD [PDF]

Journal of Chromatographic Science, 2009
Chlorophenols (CPs) and polychlorinated biphenyls (PCBs) are two of the most important groups of high-priority pollutants, due to their carcinogenicity, toxicity, and mutagenicity. This paper compares the utilization of two solid-phase microextraction (SPME) based extraction procedures, prior to gas chromatography with electron capture detection (GC ...
S L, Silva, A, Alves, L, Santos
openaire   +2 more sources

Beyond monofunctionality: structural perspectives on phenol oxidase side activity in a catalase

Acta Crystallographica Section D, Volume 82, Issue 11, Page 1224-1239, November 2026.
Structural and biochemical characterization of the extracellular fungal catalase ClCPO uncovers an unexpected phenol oxidase promiscuity. Crystal structures, substrate docking and electron‐transfer pathway analysis identify ligand‐binding regions and support a working mechanistic model for catalase‐associated phenol oxidase activity.Catalases are ...
Christina Ferousi, Christos Kosinas, Odyssefs Ioannis Pantelakis, Efstratios Nikolaivits, Evangelos Topakas, Maria Dimarogona   +5 more
wiley   +1 more source

A headspace SPME-GC-ECD method suitable for determination of chlorophenols in water samples

, 2011
A headspace solid phase microextraction coupled to gas chromatography with electron capture detector (HS-SPME-GC-ECD) method was optimized for the determination of seven chlorophenols (CPs) with different levels of chlorination.
Paulo de Morais, Pedro N Carvalho, Teresa T S D Vasconcelos, Clara C P Basto, Teodor Stoichev   +4 more
core   +1 more source