نتایج جستجو برای: solvent assisted

تعداد نتایج: 184120  

2017
Baehyun Min Sanjay Srinivasan

Solvent–steam mixture is a key factor in controlling the economic efficiency of the solvent-aided thermal injection process for producing bitumen in a highly viscous oil sands reservoir. This paper depicts a strategy to quickly provide trade-off operating conditions of the Expanding Solvent–Steam Assisted Gravity Drainage (ES-SAGD) process based on Pareto-optimality. Response surface models are...

The present article includes the Ultrasound-Assisted Extraction (UAE) of Citrus unsiu Marc. leaves rich in polyphenols. The best possible combinations of solvent, pH of the media, solvent/solid ratio, extraction time, extraction temperature and particle size were obtained for the maximum extraction of Total Phenolic Compounds (TPC) and Total Flavonoid Compounds (TFC) by us...

Journal: :Jurnal Penelitian Pendidikan IPA (JPPIPA) 2023

Seaweed is a carbohydrate polymer of alginate, agar, and carrageenan which can be extracted purified as hydrocolloids. Each has different physicochemical properties hydrocolloids form gels when dispersed in water. To achieve targeted according to specific purposes functions, conventional extraction methods, several green methods for extracting seaweed have been proposed discussed. The method th...

Journal: :Materials advances 2021

A perovskite solar cell is produced using the scalable technique aerosol-assisted chemical vapour deposition for first time. This achieved by a 2-step process with lead acetate as source and methanol solvent.

2015
Mojtaba Delfanian Reza Esmaeilzadeh Kenari Mohammad Ali Sahari

The aim of present study was to compare the effects of ultrasound-assisted and microwave-assisted extraction with solvent extraction method on antioxidant activities of jujube (Ziziphus mauritiana Lam.) leaf extracts in stability of sunflower oil during deep frying. The antioxidant activities of the extracts were evaluated by using 2, 2-diphenyl-1-picrylhydrazyl (DPPH˙) radical scavenging and β...

2016
Mustafa Bener Mustafa Özyürek Kubilay Güçlü Reşat Apak

Turmeric (Curcuma longa L.) is a medicinal plant, and its biological activities mainly arise from the main constituent, known as diferuloylmethane or curcumin. In the present paper, microwave-assisted extraction (MAE) was investigated for the recovery of curcumin from turmeric in comparison to conventional heat-assisted extraction (CHAE) technique. Various experimental conditions, such as solve...

Journal: :Molecules 2017
Souad Bouasla Juan Amaro-Gahete Dolores Esquivel M Isabel López César Jiménez-Sanchidrián Mabrouk Teguiche Francisco J Romero-Salguero

A suitable methodology of synthesis of coumarin derivatives by Pechmann reaction over heterogeneous solid acid catalysts in a free solvent media under microwave irradiation is described. Resorcinol, phenol and ethyl acetoacetate were selected as model reactants in the Pechmann condensation. The catalytic activity of several materials-Amberlyst-15, zeolite β and sulfonic acid functionalized hybr...

2012
Richard F.G. Fröhlich Evelyne Schrank Klaus Zangger

A synthetic route to a trifluoromethyl and thiol containing glucose derivative (2,2,2-trifluoroethyl 6-thio-β-D-glucopyranoside) is presented, which is based on microwave-assisted Fischer glycosylation under increased pressure. This water-soluble, neutral thiol-compound can be used to selectively introduce a fluorine probe for (19)F NMR spectroscopy on cysteines in proteins. It can be attached ...

Journal: :Inorganic chemistry 2015
Pravas Deria Wojciech Bury Idan Hod Chung-Wei Kung Olga Karagiaridi Joseph T Hupp Omar K Farha

Solvent-assisted ligand incorporation (SALI) is useful for functionalizing the channels of metal-organic framework (MOF) materials such as NU-1000 that offer substitutionally labile zirconium(IV) coordination sites for nonbridging ligands. Each of the 30 or so previous examples relied upon coordination of a carboxylate ligand to achieve incorporation. Here we show that, with appropriate attenti...

2009
Joan K. Bosworth Charles T. Black Christopher K. Ober

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