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ZnAl2O4@SiO2 nanocomposite catalyst for the acetylation of alcohols, phenols and amines with acetic anhydride under solvent-free conditions
Spinel-type oxide Zinc aluminate Silica Sol-gel process Nanocomposite Heterogeneous catalyst Acetylation Solvent-free condition
2014/3/8
A ZnAl2O4@SiO2 nanocomposite was prepared from metal nitrates and tetraethyl orthosilicate by the sol-gel process, and characterized by X-ray diffraction, Fourier transform infrared, transmission elec...
In situ generated acylimidazolium acetate as an efficient catalyst and acylating agent for the acetylation of alcohols, phenols, and amines at ambient temperature（图）
Acetylation Acylimidazolium acetate Imidazole Ionic liquid
2013/9/16
Acylimidazolium acetate was readily prepared in situ from the reaction of imidazole with acetic anhydride and subsequently acted as a catalyst and acylating agent for the efficient acetylation of alco...
Polyvinylpolypyrrolidoniume Tribromide as an Efficient Catalyst for the Acetylation of Alcohols and Phenols（图）
alcohol phenol polyvinylpolypyrrolidoniume tribromide acetylation acetic anhydride
2012/9/11
An efficient and versatile procedure for the acetylation of alcohols and phenols using acetic anhydride in the presence of a catalytic amount of polyvinylpolypyrrolidoniume tribromide has been success...
Silylation of Alcohols and Phenols with Hexamethyldisilazane over Highly Reusable Propyl Sulfonic Acid Functionalized Nanostructured SBA-15（图）
reusable heterogeneous catalyst solid sulfonic acid SBA-15 protecting group silylation hexamethyldisilazane
2011/12/21
Various alcohols and phenols were trimethylsilylated in excellent yields using hexamethyldisilazane in the presence of catalytic amounts of environmentally friendly, hydrophobic, highly thermal stable...
Antioxidant activity of selected phenols and herbs used in diets for medical conditions
herbs antioxidant activity DPPH fats
2010/2/27
The antioxidant capacity of some herbs used in dietology practice was determined by the DPPH free radical method, which was calibrated with ascorbic acid. Partially hydrophilic phenolic compounds are ...
Adsorption of Phenols and Chlorophenols in Wastewaters on Activated Carbon and Dried Activated Sludge
Phenol/o-chlorophenol/p-chlorophenol adsorption activated carbon activated sludge
2009/10/14
One of the methods used for removal of phenols and chlorophenols from the wastewaters of petroleum refineries, coke, medicine, dye, plastics, pesticide, insecticide, and paper industry is the adsorpti...
Effects of Steaming and Dehydration on Anthocyanins, Antioxidant Activity, Total Phenols and Color Characteristics of Purple-Fleshed Sweet Potatoes (Ipomoea batatas
Purple-Fleshed Sweet Potatoes Ipomoea batatas
2008/11/27
Purple-Fleshed Sweet Potatoes (PFSP) (Ipomoea batatas) are rich sources of acylated anthocyanins. Anthocyanin content, antioxidant activity and total phenols as well as color characteristics of PFSP w...
Argania spinosa is a tree specifically growing in Morocco. Its seeds contain two or three oleaginous kernels that are crushed to afford argan oil, an oil of high dietetic value. Cardioprotective argan...
Effect of Cellulases, Solvent Type and Particle Size Distribution on the Extraction of Chlorogenic Acid and Other Phenols from Spent Coffee Grounds
Chlorogenic Acid Other Phenols
2008/11/26
Spent coffee grounds, wastes resulting from the industrial preparation of instant coffee, were subjected to solid-liquid extractions to study the influence of some critical variables on the phenol con...
Effects of Steaming and Dehydration on Anthocyanins, Antioxidant Activity,Total Phenols and Color Characteristics of Purple-Fleshed Sweet Potatoes(Ipomoea batatas)
Effects of Steaming Dehydration
2008/5/31
Purple-Fleshed Sweet Potatoes (PFSP) (Ipomoea batatas) are rich sources of acylated anthocyanins. Anthocyanin content, antioxidant activity and total phenols as well as color characteristics of PFSP w...