A5046297819- Nanocomposite Films for Food Packaging
- Synthesis and biological activity
- Synthesis and Biological Evaluation
- Synthesis and Characterization of Heterocyclic Compounds
- Synthesis and Reactivity of Heterocycles
- Advanced Drug Delivery Systems
- Phenothiazines and Benzothiazines Synthesis and Activities
- Synthesis and Reactions of Organic Compounds
- Hydrogels: synthesis, properties, applications
- Surfactants and Colloidal Systems
- Petroleum Processing and Analysis
- Corrosion Behavior and Inhibition
- Adsorption and biosorption for pollutant removal
- Enhanced Oil Recovery Techniques
- Multicomponent Synthesis of Heterocycles
- Electrospun Nanofibers in Biomedical Applications
- biodegradable polymer synthesis and properties
- Environmental Chemistry and Analysis
- Conducting polymers and applications
- Concrete Corrosion and Durability
- Photopolymerization techniques and applications
- Synthesis and Catalytic Reactions
- Recycling and Waste Management Techniques
- Nanoparticle-Based Drug Delivery
- Chemical Synthesis and Reactions
Ain Shams University
2014-2024
Institute e-Austria Timisoara
2020
Al-Azhar University – Gaza
2002
Heliopolis University
1989
There are an increasing number of crude oil fields that now producing both and water emulsions; such onshore offshore. These emulsions formed during exploitation due to the presence natural surfactants, as asphaltenes resins. molecules strongly stabilize water/oil interface prevent coalescence droplets. As phase separation is necessary before transportation refining, demulsifiers used break water-in-oil emulsions. This review presents emulsion formation, factors affecting demulsification...
Herein, silver nanoparticles (Ag) embedded in polystyrene (PS) nanofiber composites have been prepared by an electrospinning technique using N, N-dimethylformamide (DMF) as a solvent and safe reducing agent. Electrospinning of solutions is conducted different parameters such polymer concentration the solution; solution feed rate, electrical field strength. Then (AgNPs) were into PS nanofibers to obtain AgNPs-PS composite powerful, cheap, nontoxic bioactive material. characterized...
Abstract Chitosan (CS) is a biopolymer that offers wide range in biomedical applications due to its biocompatibility, biodegradability, low toxicity and antimicrobial activity. Syringaldehyde (1) naturally occurring organic compound characterized by use multiple fields such as pharmaceuticals, food, cosmetics, textiles biological applications. Herein, development of chitosan derivative with physicochemical anticancer properties via Schiff base formation from the reaction sustainable...
Abstract The waste stream of obsolete electronic equipment grows exponentially, creating a worldwide pollution and resource problem. Electrical (e-waste) comprises heterogeneous mix glass, plastics (including flame retardants other additives), metals rare Earth elements), metalloids. e-waste issue is complex multi-faceted. In examining the different aspects e-waste, informal recycling in developing countries has been identified as primary concern, due to widespread illegal shipments; weak...
Hydrazonyl bromides 2a,b reacted with active methylene compounds (dibenzoylmethane, acetylacetone, ethyl acetoacetate, phenacyl cyanide, acetoacetanilide, cyanoacetate, cyanoacetamide and malononitrile) to afford the corresponding 1,3,4,5- tetrasubstituted pyrazole derivatives 5-12a,b. Reaction of 12a,b formamide, formic acid triethyl orthoformate give pyrazolo[3,4-d]pyrimidine, pyrazolo[3,4- d]pyrimidin-4(3H)one 5-ethoxymethylene-aminopyrazole-4-carbo-nitrile 13-15a,b, respectively....
Chitosan is one of the most studied polysaccharides nowadays. Because it non-toxic, widely used in food, pharmaceutical processes, agricultural, and presents excellent biological properties such as biodegradation human body, antibacterial. In present study we reported extraction low cost chitosans (Cs1, Cs2, Cs3 Cs4) from shrimp shells by chitin (Egypt: case study), then alkaline deacetylation with strong solution at different period time. The prepared were characterized FTIR spectroscopy,...
Chemical modifications of chitosan were interest to scientific researchers for its wide applications. Chitosan has been widely used synthesis unique compounds with potential biological activity and also effective wastewater treatment. In the current study fabrication new chitosan-based Schiff base hydrogels fabricated through modification isonicotinic aldehyde give hydrogel I or epichlorohydrin sodium tripolyphosphate via ionotropic gelation processes under same reaction conditions Ie,...
Chitosan (CS) is a biopolymer and has reactive amine/hydroxyl groups facilitated its modifications. The purpose of this study improvement physicochemical properties capabilities as antiviral antitumor through modification with 1-(2-oxoindolin-3-ylidene)thiosemicarbazide (3A) or 1-(5-fluoro-2-oxoindolin-3-ylidene)thiosemicarbazide (3B) via crosslinking poly(ethylene glycol)diglycidylether (PEGDGE) using microwave-assisted green technique gives (CS-I) (CS-II) derivatives. However, derivatives...
In this article, nine hydrophobically modified polyacrylamides (HM-PAM) nanolatexes, were synthesized by copolymerizing the acrylamide monomer and novel polymerizable surfactants (surfmers). The reaction was carried out inverse microemulsion copolymerization technique. initiated redox initiators composed of potassium peroxodisulphate sodium bisulfite. emulsion stabilized using mixed tween 85 span 80 as nonionic emulsifiers. prepared HM-PAMs classified into three groups according to surfmers...
New compounds based on oxindole moiety were synthesized via the reaction of 5-substitued isatins 1a-e with different nucleophiles such as benzidine, 3,3'-dimethoxybenzidine 2a,b and 2,6-diaminopyridine 3 to afford three classes bis-Schiff bases 4a-e, 5a-e 6a-e, respectively. The structures new elucidated basis their FTIR, 1H NMR, 13C GC/MS spectral data elemental analysis. in vitro antimicrobial activity was evaluated using a broth dilution technique terms minimal inhibitory concentration...