Results 81 to 90 of about 319,868 (397)
Scientific Reports, 2023 Pyranopyrazole derivatives have a vital role in the class of organic compounds because of their broad spectrum of biological and pharmacological importance.
Magda H. Abdellattif +10 more
doaj +1 more source
Acetylation of Wood Flour from Four Wood Species Grown in Nigeria Using Vinegar and Acetic Anhydride
, 2013 Effect of acetylation on pretreated wood flour of four different wood species, Boabab (Adansonia digitata), Mahoganny (Daniella oliveri), African locust bean (Parkia biglobosa) and Beech wood (Gmelina arborea), had been investigated.
Y. Azeh +3 more
semanticscholar +1 more source
Advanced Sustainable Systems, EarlyView.Hydrogels made of chemically modified biopolymers are easy to prepare and cost‐effective, they have proven to be effective materials for the simultaneous removal of seven potentially toxic elements (PTEs) from ultrapure and real water samples. The cellulose‐based one seems the best for single treatments while the gelatine‐based one seems the most ...
Monica Rigoletto +6 more
wiley +1 more source
Beilstein Journal of Organic Chemistry, 2007 2-Arylhydrazono-3-oxobutanenitriles 2 was reacted with hydroxylamine hydrochloride to yield amidooxime 3. This was cyclized into the corresponding oxadiazole 4 on refluxing in acetic anhydride.
Saleh M. Al-Mousawi +1 more
doaj +1 more source
2,3,4-Trioxo-1-(1H-pyrrolo[2,3-b]pyridin-7-ium-7yl)-cyclobutan-1-ide
Molbank, 2018 2,3,4-Trioxo-1-(1H-pyrrolo[2,3-b]pyridin-7-ium-7-yl)-cyclobutan-1-ide was obtained by reaction of squaric acid with 7-azaindole in acetic anhydride.
Duc Hoàng Lande +2 more
doaj +1 more source
Phosphorus-containing imide resins [PDF]
, 1985 Cured polymers of bis and tris-imides derived from tris(m-aminophenyl) phosphine oxides by reaction with maleic anhydride or its derivatives, and addition polymers of such imides, including a variant in which a monoimide is condensed with a dianhydride ...
Fohlen, G. M. +2 more
core +1 more source
Atmospheric pressure gas chromatography-time-of-flight-mass spectrometry (APGC-ToF-MS) for the determination of regulated and emerging contaminants in aqueous samples after stir bar sorptive extraction (SBSE) [PDF]
, 2014 This work presents the development, optimization and validation of a multi-residue method for the simultaneous determination of 102 contaminants, including fragrances, UV filters, repellents, endocrine disruptors, biocides, polycyclic aromatic ...
Arbulu +38 more
core +2 more sources
Advanced Science, EarlyView.The Tai Ji symbol from China represents the co‐existence of two opposite substances, similar to quantum entanglement. The term Janus comes from ancient Roman religion and mythology. Janus, the god of beginnings, transitions, etc., has two faces, symbolizing duality. Janus cellulose nanomaterials show structural duality.
Yu Zhao +6 more
wiley +1 more source
Acta Chimica Slovenica, 2016 The reaction of prazolobenzothienopyrimidine-3-carbaldehyde 1 with thiocarbohydrazide afforded the Schiff’s base 3. The latter compound reacted with some electrophilic reagents to give 1,2,4-triazoles 4–6 and 1,2,4-triazines 7–9.
Kamelia El-mahdy +4 more
doaj +1 more source
Polyimide processing additives [PDF]
, 1992 A process for preparing polyimides having enhanced melt flow properties is described. The process consists of heating a mixture of a high molecular weight poly-(amic acid) or polyimide with a low molecular weight amic acid or imide additive in the range ...
Burks, Harold D. +4 more
core +1 more source