Results 51 to 60 of about 265,312 (219)

Chemical fingerprinting, quantification, and antioxidant activity evaluation of Osmanthus fragrans (Thunb.) Lour. Flowers by UPLC-ECD

, 2022
Osmanthus fragrans (Thunb.) Lour. flowers are important natural resource of phenolic compounds, which have antioxidant activities and have been consumed as functional food and dietary supplements for thousand years.
Yu-Zhu Zhang (11579302), Ming-Yang Wang (49456), Ping Zhang (86495), Rong-Xiang Chen (5416364), Xiao-Yan Yuan (1737163)   +4 more
core   +1 more source

PASSIVE-SAMPLER EMPLOYED FOR ANTIFOULING BOOSTER BIOCIDES ANALYSES IN SEAWATER [PDF]

Química Nova
The antifouling booster biocides are frequently studied for toxic effects on the aquatic ecosystems. The present investigation proposes passive silicone rubber samplers as a collection method for biocides, once these methods can concentrate substances in
Marta S. D. Freitas, Rodrigo M. Batista, Andressa R. C. Costa, Ozelito P. de Amarante Junior, Teresa C. R. S. Franco, Gilberto Fillmann, Natilene M. Brito   +6 more
doaj   +1 more source

ORGANOCHLORINE INSECTICIDES RESIDUES IN RAW COW’S MILK, CREAM AND BUTTER FROM BENI-SUEF GOVERNORATE [PDF]

Assiut Veterinary Medical Journal, 2016
Organochlorine insecticides residues (α–HCH, β-HCH, Lindane, HCB, Aldrin, Heptachlor, Chlordane, total DDT, Endrin and Methoxychlor) were analyzed in 75 samples of raw milk, sour cream and cooking butter-collected from Beni-Suef Governorate- using gas ...
G.M. HASSAN, SAADIA H.E., A. REFAEE, M. RABEE   +3 more
doaj   +1 more source

Simulating competition in the US bioeconomy to produce hard‐to‐electrify transportation fuels using limited biomass resources

Biofuels, Bioproducts and Biorefining, EarlyView.
Abstract This study presents a novel bioeconomy optimization framework, BiOpt, designed to address critical questions regarding the strategic use of limited US biomass resources for biofuel production. By integrating detailed techno‐economic analyses, life cycle assessments, and resource assessment data, BiOpt optimizes resource distributions across ...
Nicholas A. Carlson, Emily K. Newes, Kristen Lu, Eric C. D. Tan   +3 more
wiley   +1 more source

MULTICOMPONENT DETERMINATION OF ORGANOCHLORINATED COMPOUNDS IN MILK BY GAS CHROMATOGRAPHY WITH ELECTRON-CAPTURE DETECTION AFTER LIQUID-LIQUID EXTRACTION

Agricultura, 2009
This paper reports a multiresidue analytical method based on liquid-liquid extraction and capillary gas chromatography with electron-capture detection (LLE-GC-ECD). The determined analytes belong to two organochlorinated compound classes: polychlorinated
Mirela Miclean, Lacrimioara Senila, Adriana Gog, Cecilia Roman, I. Groza   +4 more
doaj   +1 more source

Green Electrochromic Film Formation via Phenylcarbazole Polymerization in Ionic Liquids

Chemistry – A European Journal, EarlyView.
The scheme depicts the three‐step electropolymerization of two electrochromic polycarbazole derivatives, 4‐(9H‐carbazol‐9‐yl)phenol and 4‐(3‐methoxy‐9H‐carbazol‐9‐yl)phenol, performed at constant potential using the green ionic liquid BMIM TFSI. This medium enables controlled polymer growth and enhances electrochromic performance, yielding robust and ...
Carolina Gascó, Sara Santiago, Rosa Maria Sebastián, Gonzalo Guirado   +3 more
wiley   +1 more source

Influência da amostragem e do tempo de armazenamento de resíduos de incêndios sobre a detecção de agentes acelerantes usando SPMEGC- MS [PDF]

, 2005
TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Físicas e Matemáticas. Curso de Química.Este trabalho teve como objetivo avaliar a aplicação da microextração em fase sólida (SPME) na determinação de resíduos de líquidos ...
FERNANDES, Maria Eulália
core  

Comparison of GC-ECD, GC-MS and GC-AED for tire determination of polychlorinated biphenyls in highly contaminated marine sediment

, 1996
Electron capture detection (ECD), low- and high-resolution mass spectrometry (LR- and HRMS), and atomic emission detection (AED) were compared for the gas chromatographic (GC) detection of polychlorinated biphenyls (PCBs) present in highly contaminated ...
Pedersen-Bjergaard, S., Semb, S. I., Vedde, J., Brevik, E. M., Greibrokk, T.   +4 more
core   +1 more source

Analysis of selected organochlorine pesticides in honey samples from Poland: a pilot study

Roczniki Panstwowego Zakladu Higieny
Background Organochlorine pesticides (OCPs) were widely used in crop protection in the past. Due to their high chemical persistence and widespread presence in the environment, they have been classified as persistent organic pollutants (POPs). Given their
Radosław Lewiński, Agnieszka Hernik, Monika Liszewska, Katarzyna Czaja, Wojciech Korcz, Paweł Struciński   +5 more
doaj   +1 more source

Analytical Method Development for the Determination of Α-Endosulfan and Bifenthrin Pesticide Residues in Tea

Indonesian Journal of Chemistry, 2014
The development of analytical method for the determination of α-endosulfan and bifenthrin residues in tea has been done. The complex matrices and also the pigment were the challenge in doing quantification of the pesticide residues in tea matrices.
Dyah Styarini, Andreas Andreas, Y. Susanto Ridwan, Retno Yusiasih   +3 more
doaj   +1 more source