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Synthesis, Characterization And Antimicrobial Evaluation Of Some Hitherto Unknown 4-Oxo-Thiazoles And Thiazolo [3, 2-A] Pyridines, Said Shedid, Gameel El-Hag Ali
Synthesis, Characterization And Antimicrobial Evaluation Of Some Hitherto Unknown 4-Oxo-Thiazoles And Thiazolo [3, 2-A] Pyridines, Said Shedid, Gameel El-Hag Ali
Al-Azhar Bulletin of Science
2-(4-Oxothiazolidin-2-ylidene) acetonitrile and ethyl -2-(4-oxothiazolidin-2-ylidene) acetate (1a, b), were condensed with anthralaldehyde (1:1 molar ratio) and gave 4, 5-dihydro-4-oxothiazole derivatives (2a, b). Refluxing of 2-(Antharacene-9-yl-methylene) malononitrile in acetic acid with thioglycollic acid gave (3). 4-Thiazolidinones containing bis aryl methylidine moieties (4a-c) and (5a, b) were produced via condensation of either (2a) or (3) with different aromatic aldehydes (1:1 molar ratio). Heating of (2a) with α-substituted cin- namonitriles gave the expected substituted thiazolo [3, 2-a] pyridines (6a-d), (8) and (10a-c). The synthesized compounds have been screened for their antimicrobial activities against some selected species of Gram-positive (G+). Gram-negative (G-) bacteria and …
Comparative Study On The Corrosion Behavior Of Ti Metal, Ti-6al-4v And Co-Cr-W Alloys In Artificial Saliva, R. Tammam, A. Mogoda, S. Abd El-Kader
Comparative Study On The Corrosion Behavior Of Ti Metal, Ti-6al-4v And Co-Cr-W Alloys In Artificial Saliva, R. Tammam, A. Mogoda, S. Abd El-Kader
Al-Azhar Bulletin of Science
Open circuit potential, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements were used to examine the corrosion behavior of Ti, Ti-6Al-4V and CoCrW in artificial saliva containing different NaF concentrations. Also, the effects of saliva pH and immersion time of the studied materials in the test solution were taken into consideration. The corrosion resistance of the three materials was found to decrease with increasing fluoride concentration and increased as pH increased. As the immersion time of the materials in 0.005 M NaF increases their passivity increase in the order CoCrW> Ti >TAV.Anodization of the electrodes led to increase the passivity …
Uranium Removal From Aqueous Solution Using Tri-N-Butyl Phosphate And Di-2-Ethylhexyl Phosphoric Acid Functionalized Polyester Sheet And Charcoal As Adsorbents, Shabaan M., Daher M., Hussein M., Abdel Aal M., Hosni G., Awais S.
Uranium Removal From Aqueous Solution Using Tri-N-Butyl Phosphate And Di-2-Ethylhexyl Phosphoric Acid Functionalized Polyester Sheet And Charcoal As Adsorbents, Shabaan M., Daher M., Hussein M., Abdel Aal M., Hosni G., Awais S.
Al-Azhar Bulletin of Science
The present investigation deals with the removal of uranium from a nitric acid waste solution (Raffinate solution: produce during yellow cake of uranium production) using the extraction chromatography technique (solvent impregnated material) ), where Tri-N-butyl phosphate (TBP) and Di-2-ethylhexyl phosphoric acid (D2EHPA) solvents were impregnated upon polyester sheet and charcoal respectively then the impregnated resin were tested for uranium removal. Thus, the factors affecting the impregnation process namely, solvent concentration, impregnation time, volume/mass ratio, impregnation temperature and diluents type were studied. Secondly the influences of initial uranium concentration, adsorption temperature, contact time, pH on the uranium adsorption on the prepared …
Synthesis, Spectral Characterization And Pharmacological Evaluation Of Novel Thiazole-Oxoindole Hybrid Compounds As Potential Anticancer Agents, Yousry Ammar, A. El-Sharief, Yehia Mohamed, Ahmed Mehany, Ahmed Ragab
Synthesis, Spectral Characterization And Pharmacological Evaluation Of Novel Thiazole-Oxoindole Hybrid Compounds As Potential Anticancer Agents, Yousry Ammar, A. El-Sharief, Yehia Mohamed, Ahmed Mehany, Ahmed Ragab
Al-Azhar Bulletin of Science
In the present study, a series of thiazole derivatives bearing 5-morpholinosulfonylindole were designed and synthesized through condensation of 5-(morpholinosulfonyl)isatin (1) with some thiazolidinone derivatives as carbon nucleophiles to afford the corresponding arylidene derivatives (2-5, 7, 8). Furthermore, many thiazole derivatives (11-15) were obtained through the reaction of thiosemicarbazone derivative (10) with many reagents such as dimethyl acetelenedicarboxylate, phencylbromide derivatives, chloroacetonitrile, chloroacetylchloride as well as chloroacetanilide. The newly synthesized compounds were characterized based on spectral (FT-IR,1H NMR, 13C NMR, MS) analysis. Cytotoxicity effects of all synthesized products were tested against three cancer cell lines, MCF-7, HepG-2, HCT-116 and they showed moderate …
Modified Starch As Additives To Improve Tissue Paper Properties, Mohamed Ghazy, Waleed El-Zawawy, M. Owda, Abd-Allah Elmeshtawy
Modified Starch As Additives To Improve Tissue Paper Properties, Mohamed Ghazy, Waleed El-Zawawy, M. Owda, Abd-Allah Elmeshtawy
Al-Azhar Bulletin of Science
Our research tries to share solutions of the problems that faced who are working in the papermaking industries, especially the retention of the filler, fine fibers, drainage and machine run ability, besides paper strength, softness, smoothness and the increase in the absorption properties of the tissue paper. Starch, which is the most widely used as strengthening agent in papermaking, was modified in the current work with urea, caustic soda and were added to the pulp paste in ratios of 5 to 20 ml. On the other hand, the starch-caustic soda was further modified with trimethylamine hydrochloride in the presence of …
Electrochemical Studies On The Synthesis And Characterization Of Lithium And Vanadium And Chromium Phosphate Compounds, A. El-Aziz, Atef Shenouda, M. Sanad, H. Khalil, M. El-Sabbah
Electrochemical Studies On The Synthesis And Characterization Of Lithium And Vanadium And Chromium Phosphate Compounds, A. El-Aziz, Atef Shenouda, M. Sanad, H. Khalil, M. El-Sabbah
Al-Azhar Bulletin of Science
The use of monodiphosphate compounds as renewable sources of energy as positive (cathode) material for lithium-ion batteries (LIB) is considered a great target. Lithium vanadium chromium monodiphosphate (LVCPP)Li9V2.8Cr0.2(P2O7)3(PO4)2 and the Na-doped:Li8.75Na0.25V2.8Cr0.2(P2O7)3(PO4)2 (LNVCPP) compounds have been prepared by using the sol-gel method. The prepared materials are characterized by XRD, FESEM, and EDX. The XRD data is indicated the presence of a single-phase of Li9V2.8Cr0.2 (P2O7)3(PO4)2 and Li8.75Na0.25V2.8Cr0.2(P2O7)3(PO4)2 with trigonal structure. Both cycle performance and rate capability have shown improvement with moderate Na doping content. Li9V2.8Cr0.2(P2O7)3(PO4)2 and Li8.75Na0.25V2.8Cr0.2(P2O7)3(PO4)2 compounds presented the good electrochemical rate and cyclic ability. The cell is prepared with …
Application Of Magnetite Nanoparticles For Adsorption Of Acid Red 141 From Aqueous Solutions., Abeer Emam, Gomaa H., Elsisi A., Emam G.
Application Of Magnetite Nanoparticles For Adsorption Of Acid Red 141 From Aqueous Solutions., Abeer Emam, Gomaa H., Elsisi A., Emam G.
Al-Azhar Bulletin of Science
The potential of Fe3O4 magnetic nanoparticles (MNPs) as efficient adsorbent for acid red 141, as anionic dye, from aqueous solutions was investigated. For this purpose, Fe3O4 MNPs were synthesized via chemical co-precipitation method. The synthesized MNPs were characterized by SEM, FT-IR, XRD, and EDX techniques. The various parameters affecting dye adsorption were investigated and optimized. The kinetic studies for acid red 141 adsorption showed rapid sorption dynamics by second-order kinetic model. Dye adsorption equilibrium data were fitted well to the Freundlich isotherm rather than Langmuir isotherm. The over all adsorption process was favorable, exothermic, and follows both intraparticle and Elovich …
Water Borne Coating Based On New Nano-Copolymers(Styrene/ 2- Ethyl Hexyl Acrylate)., H. Abd El-Wahab, M. Attia, W. Hassan, A. Nasser
Water Borne Coating Based On New Nano-Copolymers(Styrene/ 2- Ethyl Hexyl Acrylate)., H. Abd El-Wahab, M. Attia, W. Hassan, A. Nasser
Al-Azhar Bulletin of Science
Nanoemulsion copolymers are stable liquid-in-liquid dispersions. Smaller particle sizes tend to valuable properties such as high surface area per unit volume, gloss, washablity, viscosity, and stability. So, new nano-styrene acrylate copolymers based on 2- Ethyl Hexyl Acrylate monomer by using Two different surfactants were prepared by emulsion polymerization, and formulated as a binder for water based paints to get useful properties. These nanoemulsion copolymers also confirmed by IR, GPC, DSC, TGA, TEM and zeta potential. The prepared nano copolymer showed enhancement in solid content, viscosity, and suitable glass transition temperature for coating formula. Finally, based on the results we compared …
Enhancement Of Microstructure And Thermal Expansion Coefficient Of Al/Ni-Sic Composite Prepared By Powder Metallurgy Technique, Shimaa Abolkassem, Omayma Elkady, Ayman Elsayed, Rabab Aboshahba, Walaa Hussein
Enhancement Of Microstructure And Thermal Expansion Coefficient Of Al/Ni-Sic Composite Prepared By Powder Metallurgy Technique, Shimaa Abolkassem, Omayma Elkady, Ayman Elsayed, Rabab Aboshahba, Walaa Hussein
Al-Azhar Bulletin of Science
Al/Ni-SiC composite was prepared via powder metallurgy technique, in which SiC particles were mixed with 10 wt % nickel powder for 24 hrs, then mixed by three percents 5, 10 and 15 wt.% with Al powder in a ball mill for 5 hrs. Three types of sintering techniques were used to prepare the composite. Uniaxial cold compacted samples were sintered in a vacuum furnace at 600oC for 1 hr. The second group was the vacuum sintered samples which were post-processed by hot isostatic press (HIP) at 600oC for 1hr under 190 MPa pressure. The third one was the hot pressed …
The Adsorption Kinetics And Modeling For Pb(Ii) Removal From Synthetic And Real Wastewater By Moringa Oleifera Seeds, A. Swelam, S. Sherif, A. Ibrahim
The Adsorption Kinetics And Modeling For Pb(Ii) Removal From Synthetic And Real Wastewater By Moringa Oleifera Seeds, A. Swelam, S. Sherif, A. Ibrahim
Al-Azhar Bulletin of Science
This work demonstrates the potential of Moringa oleifera seeds powder as an adsorbent for the removal of heavy metals from wastewater. The moringa oleifera seeds powder is characterized as an adsorbent for the removal of heavy metals from wastewater using FTIR, XRD, pHpzc, SEM and BET techniques. Several processing parameters such as; contact time, adsorbent dose, initial lead ion concentrations, pH, and temperature are optimized. The equilibrium data for bio-sorption are analyzed by using Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherm models to define the best correlation for lead ions. Among the four isotherm models, both Temkin and Freundlich models best …
Removal Of Pollutant Textile Dye From Aqueous Solution Using Mixed Nanocomposite Of Iron /Alumina Oxide And Its Modified With Cationic Surfactants, Nora Hilal, O. Mostafa
Removal Of Pollutant Textile Dye From Aqueous Solution Using Mixed Nanocomposite Of Iron /Alumina Oxide And Its Modified With Cationic Surfactants, Nora Hilal, O. Mostafa
Al-Azhar Bulletin of Science
Nanocomposites of mixed iron/aluminum oxide (Fe2O3- Al2O3) were prepared by hydrothermal method and modified with a cationic surfactant CTAB for the removal of dye (C.I Acid Orange 67). The morphology and size of the obtained nanocomposites were characterized by SEM, EDX and TEM. The resulting composite and its modified form have been characterized by using the XRD, FT-IR. Batch adsorption experiments were carried out for the removal of acid dye AO67 from aqueous solution. The adsorption of AO67 over the mixed nanocomposite and its modified form were investigated for different parameters such as the effect of CTAB concentration, effect of …
Radiation Synthesis Of Poly Vinylpyrrolidone And Polyacrylamide Hydrogels As Soil Conditioner., H. Abd El-Wahab, Mohamed, Ghobashy, Norhan Nady, A. Naser, Farag Abdelhai, Basem El-Damhougy
Radiation Synthesis Of Poly Vinylpyrrolidone And Polyacrylamide Hydrogels As Soil Conditioner., H. Abd El-Wahab, Mohamed, Ghobashy, Norhan Nady, A. Naser, Farag Abdelhai, Basem El-Damhougy
Al-Azhar Bulletin of Science
The important to synthesize a lower toxicity hydrogel with high biocompatibility to use in agricultural field. In this regard, the polymerization reaction of Poly vinylpyrrolidone and Poly acrylamide (PVP/PAAm) hydrogel has been obtained after exposed the copolymer and monomer mixture to dose of 30 kGy. The equilibrium swollen of the obtained hydrogel was 25 (g/g) after 60 min., has an advantage to use as soil conditioner. The hydrogels samples have been prepared in weight ratios 25:75, 50:50 and 75:25 (wt:wt). The crosslink density combining this with measurements of the swelling degree was depend on the copolymer concentration of two polymers. …
A Spectrophotometric Method For Vanadium Determination In Several Geological Matrices Using Alizarin Red S, Randa Elrakaiby
A Spectrophotometric Method For Vanadium Determination In Several Geological Matrices Using Alizarin Red S, Randa Elrakaiby
Al-Azhar Bulletin of Science
A simple versatile developed spectrophotometric method for the determination of vanadium (V) in several geological matrices was suggested and studied in the present work, using alizarin red S as a chromogenic dye. Several factors were studied for optimum determination, namely; effect of pH, buffer solution, dye concentration, sequence of addition, duration time and molar ratio. The complex was stable for two hours. Beer’s law was obeyed in the concentration range 0.05-6 μg ml-1 at λmax 483 nm with molar absorptivity (ε) value 0.72x104 L mol-1 cm-1, percentage relative standard deviation (%RSD) (4.5% ) and % error (1.97%). Tolerance limits of …
Characterization And Evaluation Of Natural Zeolite As A Pozzolanic Material, Mohamed Saraya, Mohamed Thabet
Characterization And Evaluation Of Natural Zeolite As A Pozzolanic Material, Mohamed Saraya, Mohamed Thabet
Al-Azhar Bulletin of Science
This paper presents details about mineralogical and chemical composition of natural zeolite (NZ) from Harrat Shama for using it as a pozzolanic material. The structural properties and mineralogical composition of NZ were determined using XRF, XRD, FTIR, DSC, SEM-EDX as well as study surface texture and cation exchange capacity. The geopolymer paste was prepared using sodium silicate solution as activator for zeolite and incubated at 25 and 45 ºC up to 90 days. The compressive strength of NZ-based geopolymer was investigated up to 90 days. Five blended cement were designed by substitution for Portland cement by 0 %, 5 %, …
Kinetic And Thermodynamic Sorption Study Of Cobalt Removal From Water Solution With Magnetic Nano-Hydroxyapatite, A. Swelam, A. Salem, A. Aanym, A. Farghly
Kinetic And Thermodynamic Sorption Study Of Cobalt Removal From Water Solution With Magnetic Nano-Hydroxyapatite, A. Swelam, A. Salem, A. Aanym, A. Farghly
Al-Azhar Bulletin of Science
In this study, Magnetite–hydroxyapatite nanocomposites were prepared by in situ precipitation of the calcium phosphate phase in an iron oxide colloidal suspension. Adsorption of cobalt was initially rapid and the adsorption process reached a steady state after 180 min. The Co(II) adsorption capability of the MHAp was investigated as a function of temperature, pH, ionic strength, adsorbent dosage, agitation speed and initial Co(II) concentration. Theincrease in pH and temperature resulted in an increase in Co(II) adsorption capacity; Increasing ionic strength increased the adsorption of Co(II) by MHAp; The adsorption isotherms were well described by the Freundlich model, Langmuir, Temkin and …
Comparative Study Between Erasable And Disappearing Inks Used In Forging Documents, Mohamed Ghazy, Waleed El-Zawawy, Taha Eldebss, Mohamed Helal, Khaled Rashed
Comparative Study Between Erasable And Disappearing Inks Used In Forging Documents, Mohamed Ghazy, Waleed El-Zawawy, Taha Eldebss, Mohamed Helal, Khaled Rashed
Al-Azhar Bulletin of Science
The aim of this work is to compare between erasable and disappearing inks and study their role in the forgery of different documents. The obtained results showed differences between erasable and disappearing inks that help the documents examiner to deal with them when submitted in cases. The disappearing ink which contains phenolphthalein loses its color by time faster than that contains thymolphthalein. While the color of erasable ink did not generally change by time at room temperature but changed on exposure to UV light. On the other hand, the disappearing ink is absorbed by paper while erasable ink remains on …
Bio-Ethanol Production From Environmental Waste Followed By Polymeric Separation Of Formed Ethanol/Water Mixture, Tarek Taha, M. Abu-Saied, Elsayed Elnaggar, Ranya Amer, Ahmed Mansy, Gamal Elkady
Bio-Ethanol Production From Environmental Waste Followed By Polymeric Separation Of Formed Ethanol/Water Mixture, Tarek Taha, M. Abu-Saied, Elsayed Elnaggar, Ranya Amer, Ahmed Mansy, Gamal Elkady
Al-Azhar Bulletin of Science
Recent studies are concerned by future energy shortage that projected to occur as a result of fossil fuel depletions. Our study was interested to use the environmental wastes as a raw material for bio-ethanol production. Kitchen wastes are one of the most distributed wastes all over the world. Starchy ingredients in the form of rice mainly are the major component of such wastes. Crude alpha amylase enzyme has been applied to convert the starch molecules into simple units of glucose. Saccharomyces cerevisiae has been subsequently used to ferment the produced glucose units into bioethanol anaerobically. The obtained results showed that …
Direct And Derivative Spectrophotometric Method For Yttrium Determination In Different Rare Earth Concentrates, Randa Elrakaiby
Direct And Derivative Spectrophotometric Method For Yttrium Determination In Different Rare Earth Concentrates, Randa Elrakaiby
Al-Azhar Bulletin of Science
A simple and accurate spectrophotometric method for the determination of Yttrium using xylenol orange as a chromogenic dye in different rare earth concentrates of Egyptian monazite and xenotime by using direct and derivative spectrophotometric methods was described in the present work. The calibration curve was linear from 0.2 – 6 μg ml-1 at a maximum wavelength value of 568 nm. The various parameters and reaction conditions, which influence the formation of the complex, were investigated where the complex were stable for one hour. The molar absorptivity (є) and Sandell’s sensitivity were found to be 3.4x104 L mol-1 cm-1and 2.7x10-3 respectively. …
Optimization Of Reduction Process Of Egyptian Ilmenite Via Metallothermic Reactions, A. Daher, N. Badawy, Waleed Mohrez, Abdallh Abbel-Hamid, A. Yossef, A. Abd El Pasir
Optimization Of Reduction Process Of Egyptian Ilmenite Via Metallothermic Reactions, A. Daher, N. Badawy, Waleed Mohrez, Abdallh Abbel-Hamid, A. Yossef, A. Abd El Pasir
Al-Azhar Bulletin of Science
It is important to develop technologies for the production of master alloys for industrial applications. Detailed research on reduction of titanium from Egyptian ilmenite by an aluminothermic process in a graphite Crucible was charged by the mixture of ilmenite, flux, aluminum was investigated. This paper study the effect of aluminum feed (10% - 35%), flux material (type, and amount), and temperature preheat from 50 oC to 400 oC and time of preheating from 0.5 hr. to 3 hrs. Then, the metallic samples formed by the reduction were analyzed using X-ray diffraction, scanning electron microscopy. The mixed fluxes were strongly and …
Alkali Activated Crab Shell For The Adsorption Of Victoria Blue From Aqueous Solution, Hassan El-Adawy
Alkali Activated Crab Shell For The Adsorption Of Victoria Blue From Aqueous Solution, Hassan El-Adawy
Al-Azhar Bulletin of Science
In this study, the adsorption equilibrium of Victoria blue (VB) dye by alkali activated crab shell (AACS) was studied using batch process. The factors affecting the adsorption process, including contact time, pH, initial dye concentration, particle size, adsorbent dosage and temperature, were investigated. The models of Langmuir, Freundlich, and Temkin isotherms were used for analyze equilibrium data. The Langmuir isotherm model was found to fit the best, and the maximum adsorption capacity was 8.6 mg/g at 35°C. Thermodynamic parameters, such as ΔH, ΔG, and ΔS were calculated. Negative values of ΔG indicated that the overall adsorption was spontaneous. The characterization …