Results 41 to 50 of about 14,190 (269)

Continuous‐Flow Photocatalytic Degradation of Glyphosate and Aminomethylphosphonic Acid Under Simulated Sunlight with TiO2‐Coated Poly(vinylidene fluoride) Membrane

open access: yesAdvanced Functional Materials, EarlyView.
Glyphosate (GLY) and its primary metabolite, aminomethylphosphonic acid (AMPA), are photodegraded using a poly(vinylidene fluoride) membrane with immobilized titanium dioxide (PVDF‐TiO2) in a continuous flow‐through operation under solar light. At optimized conditions, the PVDF‐TiO2 membrane achieved 95% GLY and 80% AMPA removal with •O2− as the ...
Phuong B. Trinh   +4 more
wiley   +1 more source

Carbon Membranes Prepared from Poly (Furfuryl Alcohol–Furfural) Precursors: Effect of FeCl3 Additive

open access: yesC, 2020
Thermosetting resins, such as poly (furfuryl alcohol), are efficient precursors for preparation of carbon membranes with molecular sieving properties. Polymerization of furfuryl alcohol is catalyzed by Bronsted or Lewis acids.
Areti Zaharopoulou   +2 more
doaj   +1 more source

Gas phase selective hydrogenation of furfural to furfuryl alcohol and 2-methylfuran over Cu-CeO2 coprecipitated catalysts [PDF]

open access: yes, 2015
Furfural is an important chemical derived from lignocellulosic biomass, in particular from C5 sugars like xylose, and it is considered as a platform molecule of great potential for the synthesis of a broad spectrum of chemicals.
Cecilia, Juan Antonio   +5 more
core  

Electrosynthesis of Bioactive Chemicals, From Ions to Pharmaceuticals

open access: yesAdvanced Functional Materials, EarlyView.
This review discusses recent advances in electrosynthesis for biomedical and pharmaceutical applications. It covers key electrochemical materials enabling precise delivery of ions and small molecules for cellular modulation and disease treatment, alongside catalytic systems for pharmaceutical synthesis.
Gwangbin Lee   +4 more
wiley   +1 more source

Dimensional stability and colour responses of Pinus elliottii wood subjected to furfurylation treatments

open access: yesMaderas: Ciencia y Tecnología, 2020
Organic substances have been used for different wood treatments, especially impregnation procedures, aiming to improve certain wood properties. The objective of this study was to evaluate dimensional stability and colorimetric features for a mature pine
Andrey Pereira Acosta   +6 more
doaj  

Optimization of Adsorption and Desorption Time in the Extraction of Volatile Compounds in Brewed Java Arabica Coffee Using the HS-SPME/GC-MS Technique

open access: yesJurnal Kimia Sains dan Aplikasi, 2022
The headspace solid phase microextraction (HS-SPME) technique has been recognized as a reliable technique for characterizing the aroma profile of Arabica coffee beans.
Lidwina Angelica Soetantijo   +4 more
doaj   +1 more source

Chromatographic techniques for the determination of free phenol in foundry resins [PDF]

open access: yes, 2011
Phenol is a toxic compound present in a wide variety of foundry resins. Its quantification is important for the characterization of the resins as well as for the evaluation of free contaminants present in foundry wastes.
Alvim-Ferraz, Maria da Conceição M.   +3 more
core   +1 more source

Remote Modulation of Single‐Atom Catalyst Boosts High‐Valent Cobalt–Oxo Species Generation for Water Purification and Detoxification

open access: yesAdvanced Science, EarlyView.
This study develops a phosphorus‐doped cobalt single‐atom catalyst that enhances high‐valent cobalt–oxo species generation for water purification. This atomic‐level tuning boosts the catalyst's activity by 3.5 times, enabling efficient pollutant degradation. A continuous‐flow reactor achieves high, long‐term removal efficiency, producing water with low
Wen‐Min Wang   +4 more
wiley   +1 more source

Enhanced selective hydrogenation of furfural to furfuryl alcohol in the organic-solvent-free system over Co/NC via hydrogen spillover and acid-base modification

open access: yesResources Chemicals and Materials
: The aqueous-phase hydrogenation of furfural to furfuryl alcohol using non-noble metal catalysts is constrained by the low activity of catalysts, necessitating high temperatures and high hydrogen pressures, and posing challenges in controlling furfuryl ...
Yanliang Yang   +8 more
doaj   +1 more source

Emission of BTEX and PAHs from molding sands with furan cold setting resins containing different contents of free furfuryl alcohol during production of cast iron [PDF]

open access: yesChina Foundry, 2015
At present, furan resin is the largest selling no-bake system of moulding sands. The most commonly used furan no-bake binders (FNB) are condensation products of furfuryl alcohol (FA) urea, formaldehyde and phenol.
Mariusz Holtzer   +2 more
doaj  

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