A5002236532- Calcium Carbonate Crystallization and Inhibition
- Synthesis and biological activity
- Methane Hydrates and Related Phenomena
- Bone Tissue Engineering Materials
- Synthesis and Characterization of Heterocyclic Compounds
- Minerals Flotation and Separation Techniques
- Chemical Synthesis and Characterization
- Multicomponent Synthesis of Heterocycles
- Synthesis and Biological Evaluation
- Magnetic and Electromagnetic Effects
- Synthesis of Organic Compounds
- Microbial Applications in Construction Materials
- CO2 Sequestration and Geologic Interactions
- Inorganic Fluorides and Related Compounds
- Hydraulic Fracturing and Reservoir Analysis
- Spacecraft and Cryogenic Technologies
- Micro and Nano Robotics
- Synthesis and Reactivity of Heterocycles
- Crystallization and Solubility Studies
- Enhanced Oil Recovery Techniques
- Dendrimers and Hyperbranched Polymers
- Advanced Thermoelectric Materials and Devices
- Click Chemistry and Applications
- Drilling and Well Engineering
- Offshore Engineering and Technologies
Qatar University
2022-2025
University of Stavanger
2014-2023
National Research Centre
2008-2022
Cairo University
2016-2022
Al-Azhar University
2021
National Water Research Center
2021
Green Chemistry
2012
A Schiff base ligand of o-vanillin and 4-aminoazobenzene its transition metal complexes Ni(II), Co(II), Zn(II), Cu(II), Mn(II), Zr(IV) were prepared under microwave irradiation as a green approach compared to the conventional method. The structures new compounds have been characterized elucidated via elemental spectroscopic analyses. In addition, magnetic susceptibility, electron spin resonance, electronic spectra synthesized explained their geometrical structures. thermal stability was...
Thanks to their excellent photoelectric characteristics generate cytotoxic reactive oxygen species (ROS) under the light-activation process, TiO2 nanomaterials have shown significant potential in photodynamic therapy (PDT) for solid tumors. Nevertheless, limited penetration depth of TiO2-based photosensitizers and excitation sources (UV/visible light) PDT remains a formidable challenge when confronted with complex tumor microenvironments (TMEs). Here, we present H2O2-driven black mesoporous...
The molecular hybridization concept has recently emerged as a powerful approach in drug discovery. A series of novel indole derivatives linked to the pyrazole moiety were designed and developed via protocol antitumor agents. target compounds (5a–j 7a–e) prepared by reaction 5-aminopyrazoles (1a–e) with N-substituted isatin (4a,b) 1H-indole-3-carbaldehyde (6), respectively. All products characterized several analytical spectroscopic techniques. Compounds screened for their cytotoxicity...
Nanotechnology has grown rapidly in both research and applications over the past two decades including upstream petroleum industry. A recent hot area for studying nanotechnology been oilfield scale management. The formation of deposits such as calcium carbonate Group II sulfate scales conduits on equipment, downhole topside, can cause serious loss hydrocarbon production unwanted downtime. Scale management is expensive to field operator, mostly due downtime causing deferred or production....
The petroleum industry has strived for several years to explore environmentally friendly scale inhibitors with no acute environmental impact. Well-known industrial biodegradable polyaspartic acid is widely used as a potent inhibitor (SI) against various inorganic scales in circulating cooling water and topside applications. However, showed weak thermal stability at the reservoir temperatures. Here, we attempt develop new class of squeeze treatment applications under harsh conditions. In this...
Phosphonate-based scale inhibitors (SIs) have been used in the oil industry for decades. They are excellent particularly of Group II sulfate scales and offer several advantages over other classes oilfield SIs that contain predominantly carboxylate or sulfonate groups. For example, phosphonates show superior binding to reservoir rocks, giving them long squeeze lifetimes. The means non-polymeric phosphonate molecules can be used, whereas polymers with groups need polymeric. Phosphonates also...
A series of natural proteins and partially hydrolyzed (peptones) from various animal plant sources have been tested for the ability to prevent formation barium sulfate calcium carbonate scaling use as environmentally friendly scale inhibitors (SIs) in petroleum industry. All SI performance experiments were carried out a dynamic tube blocking rig at 100 °C 80 bar. Although many proteins/peptones showed poor or negligible performance, milk proteins, casein peptones, tryptones reasonable...
Most non-polymeric oilfield scale inhibitors contain aminomethylenephosphonate groups. They generally have poor biodegradability, limiting their use in regions with strict environmental regions, such as offshore Norway. From mono- and bisnitrile starting materials, we synthesized investigated compounds one or two aminobisphosphonate groups, −C(NH2)(PO3H2)2, for seawater calcium carbonate barium sulfate inhibition, compatibility Ca2+ ions. The distance between these groups was shown to affect...
Scaling is one of the most frequently stated problems in oil industry, and scale inhibitors (SIs) are applied to prevent its formation. Organophosphonates well-known types SIs, particularly useful for squeeze treatments, which can be found as both non-polymeric polymeric molecules. However, performance phosphonate-based SIs often limited by poor compatibility with calcium ions. In addition, many phosphonated exhibit seawater biodegradation. Therefore, there still a need develop effective...
A series of N-aryl-7-aryl-pyrazolo[1,5-a]pyrimidines 18a⁻u and N-aryl-pyrazolo[1,5-a]quinazolines 25a⁻c were designed synthesized via the reaction 5-aminopyrazoles 11a⁻c with enaminones 12a⁻g or 19, respectively. The new compounds screened for their in vitro antitumor activity toward liver (HepG-2) breast (MCF-7) human cancer cells using 3-[4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide MTT assay. From results, it was found that all showed dose-dependent cytotoxic activities...
Electrochemical CO2 reduction (ECR) has received great attention in energy conversion and mitigation. In recent years, graphitic carbon nitride (g-C3N4) been regarded as a very promising support for metal nanoparticles (NPs) many catalytic reactions. this work, we reported the silver- (Ag) loaded boron-doped g-C3N4 nanocomposite (Ag-B-g-C3N4) efficient ECR to CO by joint first-principles study experimental work. Theoretical simulation demonstrated that B dopant Ag NPs could be easily...
The advent of autonomous nanomotors presents exciting opportunities for nanodrug delivery. However, significant potential remains enhancing the asymmetry and advancing development second near-infrared (NIR-II) light-propelled capable operating within deep tissues. Herein, we developed a dual-ligand assisted anisotropic assembly strategy that enables precise regulation interfacial energy between selenium (Se) nanoparticle periodic mesoporous organosilica (PMO). This facilitates controllable...
Abstract Use of microwave irradiation in the synthesis arylidenemalononitrile and benzopyran derivatives water without catalyst is a clean method with high yield.
Oilfield scale inhibitors have been used for many decades, mostly to fight carbonate and sulfate scaling. Many are known, but only a few show good biodegradation make them environmentally acceptable in areas with strict regulations, such as offshore Norway. Often high is at the expense of other useful properties, thermal stability high-temperature squeeze applications. We now synthesized investigated new class polycarbonate polymers pendant anionic functional groups (carboxylate phosphonate)...
Organophosphorus-based scale inhibitors (SIs) have been widely used in the petroleum industry for several decades. Among them, aminomethylenephosphonates (possessing at least one −NH+–CH2–PO3H– moiety) shown outstanding inhibition efficiency against carbonate and sulfate oilfield scales. However, of main drawbacks aminomethylenephosphonate-based SIs with multiple phosphonate (−PO3H2) groups is their poor tolerance high-calcium brines. In this work, calcium was improved by reducing number...
Poly(N,N-dimethylhydrazidoacrylamides)s (PDMHAMs) and a series of copolymers (N,N-dimethylhydrazidoacrylamide) (N-isopropylacrylamide) were recently investigated as kinetic hydrate inhibitors (KHIs). Poly(N-vinylcaprolactam) (PVCap) related have been used class commercial KHIs in the oil gas industry to prevent plugging pipelines with hydrates. In this study, we synthesized ability DMHAM monomer VCap inhibit structure II formation high-pressure rocking cells at approximately 75 bar. Various...