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Cation Modified Silicates For Catalytic Production Of Phenol From Benzene, Medhat El-Moselhy
Cation Modified Silicates For Catalytic Production Of Phenol From Benzene, Medhat El-Moselhy
Al-Azhar Bulletin of Science
The current work was an attempt to produce phenol from benzene in a one step using Al and Fe modified Silicates. This chemistry would be commercial from industrial point of view with the obtained conversion of benzene to phenol in one step. The preparation of Al and Fe-Silicate have been carried out at 100 oC by the addition of Al and Fe sources to silicate solution and the obtained material were dried at 100 oC over night and calcined at 550 oC. The obtained materials were characterized using X-ray diffraction (XRD) and Infra Red (IR) spectroscopy. The oxidative properties of …
Treatment Of Ash Leachate Using Different Functional Group Anion Exchange Resins, Medhat El-Moselhy
Treatment Of Ash Leachate Using Different Functional Group Anion Exchange Resins, Medhat El-Moselhy
Al-Azhar Bulletin of Science
Fly ash leachate wastewater containing a wide variety of toxic heavy metals either in cationic or oxyanionic forms. Treatment of such water represents a challenge for all researchers due to the higher concentrations and competitive effect of all the existing cations and anions. The process of treatment was investigated using different functional groups anion exchangers to reach the most suitable materials and conditions for lowering the level of contamination for the wastewater reuse. The effects of most abundant anionic species in leachate wastewater such as sulfate on the adsorption of boron, molybdate, chromate, arsenate and selenate oxyanions were studied at …
Synthesis And Antimicrobial Evaluation Of Some Novel Thiazolo[3,2-A]Pyridine, Pyrano[2,3-D]Thiazole And Pyrano [2',3':4,5]Thiazolo[3,2-A]Pyridine Derivatives Using N-Cyclohexyl-2-Cyanoacetamide, M. Helal, Sh. Mohamed, Y. Mohamed, A. Ali, Y. Ammar
Synthesis And Antimicrobial Evaluation Of Some Novel Thiazolo[3,2-A]Pyridine, Pyrano[2,3-D]Thiazole And Pyrano [2',3':4,5]Thiazolo[3,2-A]Pyridine Derivatives Using N-Cyclohexyl-2-Cyanoacetamide, M. Helal, Sh. Mohamed, Y. Mohamed, A. Ali, Y. Ammar
Al-Azhar Bulletin of Science
A novel and efficient method for the synthesis of a new variety of 2-(N-cyclohexyl-2-cyanoacetamide)-2-thiazolin-4-one and its corresponding thiazolo[3,2-a] pyridines and pyrano[2,3-d]thiazoles by the reaction of N-cyclohexyl-2-cyano-acetamide with thioglycolic acid. The synthetic potential of the method is demonstrated and antimicrobial evaluation.
Synthesis And Characterization Of Some Novel Thiazole, Thiazolo[3,2-A]Pyridine And Thiazolo[3,2-A]-1,8-Naphthyridine Derivatives Containing Morpholine Moiety, Gameel El-Hag-Ali
Synthesis And Characterization Of Some Novel Thiazole, Thiazolo[3,2-A]Pyridine And Thiazolo[3,2-A]-1,8-Naphthyridine Derivatives Containing Morpholine Moiety, Gameel El-Hag-Ali
Al-Azhar Bulletin of Science
One pot reaction of morpholin or piperidine , ethyl cyanoactate,and thioglycollic acid afforded the novel 2-(2-morpholino-2-oxo-ethylidene)-4-thiazolidinone and 2-(2-oxo-2-(piperidin-1-yl) ethylidene) thiazolidin-4-one (1a,b).Cyclization of (1a) with chloroacetonitrile and malononitrile afforded the novel thiazolidinone derivatives (2a,b).Refluxing of (1a) with o-chlorobenzaldehyde,and chloroacetonitrile furnished (3). Compound (1a) reactedwith aromatic aldehydes in refluxing ethanol affording 5-arylmethylidine-4-thiazolidinone (4a,b).4-Thiazolidinone derivative (4a) was cond-ensed with hydrazine hydrate to give (5). Thiazolo [3,2-a]pyridine and pyrano [2,3-d]thiazole derivatives (6,7) were produced through reaction of (4a,b,) witha mixture aromatic aldehyde and malononitrile. Compound (6) was reacted with ethyl isot-hiocynate and hydrazine hydrate to give the corresponding thiazolopyridine derivatives (8,9) .When compound (6) …
Chloroacetonitrile In Hetero Cyclic Synthesis; Novel Route For The Synthesis Of Thiazolidine, Chormene, Pyrrole, And Pyrazole Derivatives As Antimicrobial Agents, Gameel El-Hag-Ali
Chloroacetonitrile In Hetero Cyclic Synthesis; Novel Route For The Synthesis Of Thiazolidine, Chormene, Pyrrole, And Pyrazole Derivatives As Antimicrobial Agents, Gameel El-Hag-Ali
Al-Azhar Bulletin of Science
Thiazolidinone (5b), chormeno [2,3-b] pyrrole (11) and 2-(2-ethoxyphenylamino) acetonitrile (16), were obtained from the reaction of chloroacetonitrile (1) with thioglycollic acid (2) , salicyaldehyde in presence of malononitrile, and o-phentidine ,respectively. Fusion of compound (5b) with hydrazine hydrate furnished (6), while fusion chloroacetonitrile (1), 2-chlorobenzaldehyde and thioglycollic acid (2) gave (8). Treatment of (1), and (16) with a mixture of aromatic aldehyde and hydrazine hydrate gave the corresponding Pyrazole derivatives (18,24,and 25). The reaction of compound (11) with each of acetic anhydride, carbon disulphide, and formic acid gave the corresponding chormeno [2,3-b] pyrrole derivatives(13-15),respectively. Refluxing (16) with salicyaldehyde in presence …
Generation Of Meat-Like Volatiles From Cysteine, Glucose And Serine Model System And Its Antioxidant Activity, Saied Shedid
Generation Of Meat-Like Volatiles From Cysteine, Glucose And Serine Model System And Its Antioxidant Activity, Saied Shedid
Al-Azhar Bulletin of Science
Reaction between Cysteine, Glucose and Serine was carried out to study the volatiles formed via Maillard reaction and their antioxidant activity. The simultaneous distillation–extraction technique was used for trapping the volatile components followed by GC–MS analysis. Thirty Six compounds were identified with the predominance of carbonyls and sulfur–containing compounds in the volatiles of this model system. Sensory evaluation was performed for the model system product according to the International Standard Methods (ISO). The results showed a high increase in roasted and burnt meat attributes. The sensory results of the model system product were confirmed by the presence of high concentrations …
Fluoride Removal Using Zr Loaded A500p In Comparison With Activated Alumina, Medhat El-Moselhy, Arup Sengupta
Fluoride Removal Using Zr Loaded A500p In Comparison With Activated Alumina, Medhat El-Moselhy, Arup Sengupta
Al-Azhar Bulletin of Science
Fluoride contamination of groundwater, both anthropogenic and natural, represents a major problem. A500P anion exchanger was loaded with Zr ions and precipitated with sodium hydroxide followed by thermal treatment at 60 oC to form Zr oxide in hydrated phase. Fluoride removal by using Zr loaded A500P in comparison with activated alumina was investigated by batch studies from solutions with fluoride concentration 5 mg/L at different experimental conditions. The results indicate that fluoride adsorption occurs immediately over the entire surface of A500P Zr loaded resin, after shaking for 6 h to reach equilibrium, as well as activated alumina. The obtained data …
Kinetics Of The Hydrolysis Of Amides Having Arly Group Catalysed By Exchange Resin Or An Acidic Soution In 1, 4-Dioxane %30-Water Media, Abdel-Aleem Aboul-Magd, Salwa El-Rashed, Mona Al- Shimmery
Kinetics Of The Hydrolysis Of Amides Having Arly Group Catalysed By Exchange Resin Or An Acidic Soution In 1, 4-Dioxane %30-Water Media, Abdel-Aleem Aboul-Magd, Salwa El-Rashed, Mona Al- Shimmery
Al-Azhar Bulletin of Science
The mechanism of the n-benzoyl benzamide hydrolysis was studied in hetero and homogenous 30%(V/V) 1, 4-dioxane–water mixture within the temperature range between 60oC and 100oC.The reaction mechanisms was carried using a batch reactor method limited technique. The variation of the rate constant was found 2nd –order type with temperature in presence of a bulk solution consists of 30%, 40% and 50% 1, 4-dioxane .The efficiency ratio of an acid resin and acid solution has been measured and compared at a number of temperatures. Specific solvent effects on the reaction rate and mechanism have been investigated. The equilibrium in 10% and …
Kinetics And Thermodynamic Studies On Removal Of Cadmium Metal Ion From Aqueous Solution Using Rice Straw, Adham El-Zomrawy, M. Thabet, M. Awad, A. Swalem, M. Abo-Shouk
Kinetics And Thermodynamic Studies On Removal Of Cadmium Metal Ion From Aqueous Solution Using Rice Straw, Adham El-Zomrawy, M. Thabet, M. Awad, A. Swalem, M. Abo-Shouk
Al-Azhar Bulletin of Science
The removal of Cd(II) from aqueous solution by batch adsorption technique using rice straw (SIII) and its ash (R400), in absence and presence of 0.005M hydrochloric acid were used to determine the adsorption efficiency. Kinetic studies were performed to understand the mechanistic steps of the adsorption process and the rate kinetics for the adsorption of Cd(II). The kinetic data supports pseudo-second order model and intra-particle model but shows very poor fit for pseudo-first order model. Thermodynamic parameters including the Gibbs free energy, enthalpy, and entropy indicated that the adsorption of Cd(II) ions was feasible, spontaneous in absence of HCl and …
Kinetics And Thermodynamic Studies On Removal Of Copper Metal Ion From Aqueous Solution Using Rice Straw, A. El-Zomrawy, M. Thabet, M. Awad, A. Swalem, M. Abo-Shouk
Kinetics And Thermodynamic Studies On Removal Of Copper Metal Ion From Aqueous Solution Using Rice Straw, A. El-Zomrawy, M. Thabet, M. Awad, A. Swalem, M. Abo-Shouk
Al-Azhar Bulletin of Science
The adsorption percentage of Cu(II) ions from aqueous solution in the absence and in the presence of different concentration of hydrochloric acid on rice straw (SIII) and its ash (R400) were studied in a modified batch adsorption technique. The kinetic data was analyzed using various kinetic models particularly pseudo-first-order, pseudo-second-order and intra-particle diffusion. The pseudo-second-order kinetic model was found to agree well with the experimental data. Thermodynamic parameters such as enthalpy (DH°), free energy (DG°) and entropy (DS°) changes towards calculated and adsorption process was spontaneous at R400 in the absence and in the presence of 0.005 M HCl and …
Alkyl Oleate Succinic Anhydride As A New Modification Of Internal Paper Sizing Agent, M. Aboul-Fetouh, F. Nassar, A. Tantawy
Alkyl Oleate Succinic Anhydride As A New Modification Of Internal Paper Sizing Agent, M. Aboul-Fetouh, F. Nassar, A. Tantawy
Al-Azhar Bulletin of Science
There are two common synthetic sizing agents which are used in neutral-alkaline paper making: alkyl ketene dimer (AKD) and alkenyl succinic anhydride (ASA). However both show many disadvantages on application. Using alkyl oleate enabled us to improve the performance of the sizing chemicals. Two alkyl oleate succinic anhydride: methyl and ethyl oleate succinic anhydrides have been prepared, converted to aqueous emulsion and used in sizing of paper hand sheets at laboratory scale. The sizing performance of each was compared with that of the commercial sizing agents.
Studies On The Binary And Ternary Complexes Of Aluminium(Iii) With Gallic Acid And Adrenaline, Mahmoud Moustafa
Studies On The Binary And Ternary Complexes Of Aluminium(Iii) With Gallic Acid And Adrenaline, Mahmoud Moustafa
Al-Azhar Bulletin of Science
The reaction of aluminium(III) ions with gallic acid (3,4,5–trihydroxybenzoic acid) (GAL) and adrenaline (epinephrine) (1-(3,4–dihydroxyphenyl)-2–methylaminoethanol) (ADR) was investigated by potentiometric and optical means. Stability constants of the binary and ternary complexes at 25°C and in 0.1 M NaNO3 ionic strength in aqueous solution have been determined. The complex formation equilibria involving adrenaline were characterized The constant due to is 0.75. The results indicate that the overall ratio of the ternary complex Al(GAL)(ADR) is 1:1:1 and the mixed-ligand complex is more stable than one expected from purely statistical reasons. UV-Vis spectroscopy gave additional support to the results.
Studies On The Catalytic Hydrolysis Of Benzamide By Bi–Mo–O Catalysts, M. Wassel, R. Saber
Studies On The Catalytic Hydrolysis Of Benzamide By Bi–Mo–O Catalysts, M. Wassel, R. Saber
Al-Azhar Bulletin of Science
The catalytic hydrolysis of benzamide over mixed oxides Bi2O3-MoO3 , Bi2O3-2MoO3 and Bi2O3 - 3MoO3 , was carried out at initial concentrations of benzamide (0.03 and 0.07M), using variable amounts of catalyst 0.25, 0.50 and l.0 gm/200 ml solution. The kinetic study was carried out at (25,35 and 45C°) and the effect of calcination time (30, 60, 90 and 120hr) was investigated, Such study revealed that the reaction is kinetically of first order type, and that the percent conversion increased with reaction temperature, quantity of catalyst, and also with increasing the ratio of MoO3 present in the catalyst, with the …
Heteroaromatization With Sulfonamido Phenyl Ethanone: Part (Iv). Synthesis And Antimicrobial Activity Of New N-Ethyl-N-Methylbenzenesulfonamide, 1,3,4-Thiadiazole, 1,3,4-Thiadiazine, 4-Oxothiazolidine And Pyrazolo[5,1-C][1,2,4]Triazine Derivatives, Mahmoud Abdelall, Mahmoud Bashandy, Ahmad El-Morsy
Heteroaromatization With Sulfonamido Phenyl Ethanone: Part (Iv). Synthesis And Antimicrobial Activity Of New N-Ethyl-N-Methylbenzenesulfonamide, 1,3,4-Thiadiazole, 1,3,4-Thiadiazine, 4-Oxothiazolidine And Pyrazolo[5,1-C][1,2,4]Triazine Derivatives, Mahmoud Abdelall, Mahmoud Bashandy, Ahmad El-Morsy
Al-Azhar Bulletin of Science
This article describes the synthesis of some novel sulfonamide having the biologically active, hydrazones 7-11,1,3,4-thiadiazoles 15-18, 20,1,3,4-thiadiazine 19, 4-oxothiazolidines 21, 26-29 andpyrazolo[5,1-c][1,2,4]triazine 32 moieties starting with 4-acetyl-N-ethyl-N-methylbenzenesulfonamide (1). The structure of the newly synthesized compounds was confirmed by elemental analysis, IR, 1H NMR, and mass spectral data.
Synthesis And Characterization Of A New Cation Exchanger-Manganese (Ii) Silicate Doping With Fe, Ce, V And W Elements And Their Use For Treatment Industrial Liquid Wastes., I. El-Naggar, E. Zakaria, I. Ali, M. El-Sabbah, A. Soliman
Synthesis And Characterization Of A New Cation Exchanger-Manganese (Ii) Silicate Doping With Fe, Ce, V And W Elements And Their Use For Treatment Industrial Liquid Wastes., I. El-Naggar, E. Zakaria, I. Ali, M. El-Sabbah, A. Soliman
Al-Azhar Bulletin of Science
Manganese (II) silicate has been synthesized as a gel product by direct precipitation reaction. Modifying its structure by doping with iron, cerium, vanadium and tungsten elements has been carried out. These materials were characterized using X-ray, IR ,TGA-DTA and chemical stability was studied. The prepared materials show increasing in the capacities values from 2.65, 2.55, 2.22, 1.73 and 1.50 to 3.61, 3.42, 3.11, 2.68 and 2.16 (meqg-1) for Co2+, Cd2+, Cu 2+, Cs+ and Al3+, Respectively as a result of the modification by doping. pH titration data reveal monofunctional behavior. The distribution coefficients values of metal ions have been determined …
Enforcement Of Pesticide Regulation In California: A Case Study Of The Experience With Methyl Bromide, Victoria Clark
Enforcement Of Pesticide Regulation In California: A Case Study Of The Experience With Methyl Bromide, Victoria Clark
Golden Gate University Law Review
This article will attempt to provide an overview of the pesticide regulatory program ("the Program") and its pitfalls, as well as the track record of the administration of California Governor Gray Davis ("the Davis Administration") regarding pesticide issues. The first section will detail the regulatory agency structure of the Program, particularly the authority and duties of DPR and the CACs. The second section will discuss the pesticide permitting system, its requirements, and some anecdotes to illustrate the public participation process in this system. To present a case study of the Program's implementation, the methyl bromide regulations will be discussed at …
A Facelift For Fossil Fuel, Amy Oprean
A Facelift For Fossil Fuel, Amy Oprean
New Science
As scientists around the world scramble to develop a viable alternative to fossil fuels, one Wayne State researcher is working to improve the traditional oil refining process for a cleaner, more securely-obtained gasoline. Stephanie Brock, Ph.D., professor of chemistry in the College of Liberal Arts and Sciences, is working as a co-investigator with Mark Bussell, Ph.D., professor of chemistry at Western Washington University, to modify the process by which sulfur is removed from crude oil – a vital step in turning oil into usable fuel. The goal is to synthesize catalysts to make a refining process that’s fit to handle …
Kinetics And Mechanism Of Oxidation Of P-Anisidine By Fe(Iii) Solution In Acidic Medium, Mohamed Mansour
Kinetics And Mechanism Of Oxidation Of P-Anisidine By Fe(Iii) Solution In Acidic Medium, Mohamed Mansour
Al-Azhar Bulletin of Science
Kinetics of oxidation of p-anisidine by Fe(III) ion was studied spectrophotometry in acidic medium. The rate constant was found to increase with increasing p-anisidine and hydrogen ion concentrations. The order of reaction was found to be first order with respect to both Fe(III) ion and p-anisidine concentration. The suggested mechanism involves the interaction of the reactive species of the reactants to form the activated complex which decompose in a rate determining step to products. The rate law was derived and activation parameters are calculated to be H* = 47 kJ mol-1 and S* = -148.6 JK-1 mol-1
Impact Of Air Pollution On The Colour & Physical Properties Of The Mordanted Wool Yarns Dyed With Natural Dyes In Urban Area, M. Kamel, H. Helmy, Ali Shakour, S. Rashed
Impact Of Air Pollution On The Colour & Physical Properties Of The Mordanted Wool Yarns Dyed With Natural Dyes In Urban Area, M. Kamel, H. Helmy, Ali Shakour, S. Rashed
Al-Azhar Bulletin of Science
Wool yarns are dyed with natural colouring matter extracted from Cochineal, Turmeric and Madder and mordanted with different mordants using exhaustion method. Many measurements of the mordanted dyed wool samples after exposure to air & light for different periods of time in one year in urban area (Helwan city) has been carried out. These measurements are change of colour, physical properties (tensile strength, tenacity and elongation) of the mordanted dyed wool samples. Also, the air pollution in Helwan city was studied, through determination of the suspended and deposited particulate matter and sulpher dioxide concentrations.
Cold Pad Batch Dyeing Of Linen Fabric With Some Reactive Dyes, Hamada Mashaly, Peter Hauser
Cold Pad Batch Dyeing Of Linen Fabric With Some Reactive Dyes, Hamada Mashaly, Peter Hauser
Al-Azhar Bulletin of Science
Unmodified linen fabrics were cationized by reaction with two different commercial cationizing agents, CHTAC (3-chloro-2-hydroxypropyltrimethyl ammonium chloride) and PAQAC (polyaminochlorohydrin quaternary ammonium salt with epoxide functionality). The uncationized and cationized linen fabrics were dyed with four different reactive dyes with the cold pad batch dyeing method. The fastness properties of the dyed, cationized linen fabrics were evaluated.
Utility Of Thioglycollic Acid In The Synthesis Of Some Newly Thiazolidinone And Thiazolo[3,2-A]Pyridine Deriva-Tives As Antimicrobial Agents, Gameel Elhagali, Hessen El-Tamamay, Ma-Nsour El-Senussi, Zamzam Elbasher
Utility Of Thioglycollic Acid In The Synthesis Of Some Newly Thiazolidinone And Thiazolo[3,2-A]Pyridine Deriva-Tives As Antimicrobial Agents, Gameel Elhagali, Hessen El-Tamamay, Ma-Nsour El-Senussi, Zamzam Elbasher
Al-Azhar Bulletin of Science
A series of thiazolo[3,2-a] pyridine derivatives 3, 4a-d, 9a-e, 11a-e, and 13 were synthesized through the interaction of 4,5-dihydro-2-ethoxycarbonyl methyllidine-4-thiaz-olidinone 1 with the corresponding α,β-unsaturated nitrile compounds 2a-e, 6a-e, 10a-e,and 12, respectively.4-Thiazolidinone derivative 1 was reacted with 2 moles of p-chlorobenza-ldehyde to give 14 which was reacted with malononitrile to afford the corresponding thiazolo [3,2-a]pyridine derivative 15. Acetylation of compound 15 with acetic anhydride furnished N-acetyl amino derivative 16. The structures of these compounds were elucidated on the basis of their spectral data (IR, 1HNMR and MS).These compounds were also screened for their antimicrobial activity against pseudomonas aeruginosa, Bacillus subtilis, …
Some Reactions Of N-(4-Acetylphenyl)-2-Cyanoacetamide With Various Electrophilic Reagents: Synthesis Of Thiazolidinones, 3,5-Dicyano-6-Amino-2-Oxopyridine, 2-Imino-2h-Chromene-3-Carboxamide And 5-Imino-3h-Chromeno[3,4-C]Pyridine-1-Carbonitrile Derivatives, Mohammed Salem
Al-Azhar Bulletin of Science
Reactions of N-(4-acetylphenyl)-2-cyanoacetamide (1) with several electrophilic reagents are reported. Thus, N-(4-acetylphenyl)-2-cyano-2-(3-phenylthiazol-2-ylidene)acetamide derivatives 4,5a-c were obtained. 4,6-dimethyl-2-oxo-1-(4-acetylphenyl)-1,2-dihydropyridine-3-carbonitrile (8) and their thiosemicarbazone derivative (9) were synthesized. Treatment of 1 and its thiosemicarbazone derivative 6 with α-cyanocinnamonitrile 10a,b under Michael reaction conditions afforded N-(4-acetylphenyl)-2-cyano-3-(4-methoxyphenyl)acrylamide (12) and 6-amino-4-(4-chlorophenyl)-3,5-dicyano-2-oxo-pyridine derivative 15, respectively. Condensation of 6 with α-halocarbonyl compounds gave 1,3-thiazole derivatives 16a,b & 17a,b which on treatment of 16a, 17a with salicyaldehyde gave 2-iminochromene derivatives 18 and 19, respectively. Treatment of 1 with phenolic aldehydes yielded 2-iminochromenes 21a,b which on treatment with ethanolic HCl gave chromene-2-one derivatives 22a,b, respectively. Treatment of 21a with malononitrile …
Effective Commercial Additives For Improving Poly- Propylene Fibres Properties By The Melt Extrusion Process, S. Gawish, R. Kotek, R. Monticello, A. Ramadan, H. Avci, S. Mosleh
Effective Commercial Additives For Improving Poly- Propylene Fibres Properties By The Melt Extrusion Process, S. Gawish, R. Kotek, R. Monticello, A. Ramadan, H. Avci, S. Mosleh
Al-Azhar Bulletin of Science
The effect of three commercial inorganic additives supplied by Ciba Speciality Chemicals, Germany namely, Irgaguard B 5000 (carrier of Ag/ Zn zeolite), Irgaguard B7000 (carrier of Ag / Zn glass) and Irgaguard 1000 (triclosan) on the properties of polypropylene fibers was studied. These additives 0.1- 2 %(w/w) concentrations were well mixed to preheated isotatic PP chips and added into the hopper tanks of a Fourne’ double extruders machine together with purged nitrogen gas and melt extruded at 250ºC to produce the continuous fibers. Characterization of the produced PP / Irgaguard composite fibers was carried out by Thermo Gravimetric Analysis (TGA) …
Synthesis And Biological Activities Of Some 3-(Amino Or Arylidine)-2-Pyridinyl-4(3h)-Quinazolinone And Some Of Their Copper Complexes, Mohsen Aly, Wahid Basyouni, Yahia Mohamed, Khairy El-Bayouki, Samir Abbas
Synthesis And Biological Activities Of Some 3-(Amino Or Arylidine)-2-Pyridinyl-4(3h)-Quinazolinone And Some Of Their Copper Complexes, Mohsen Aly, Wahid Basyouni, Yahia Mohamed, Khairy El-Bayouki, Samir Abbas
Al-Azhar Bulletin of Science
Several 4(3H)-quinazolinones containing pyridine moiety were synthesized starting from substituted anthranilic acid derivatives. Copper complexes of 3-amino-2-pyridinyl-4(3H)-quinazolinones and some of their derivatives were synthesized and characterized. The synthesized compounds were screened for their anticonvulsant, analgesic, antitumor, as well as, their antimicrobial activities.
Ultrasonic Assisted Eco-Friendly Dyeing Of Silk Fabrics, G. Shokry, E. El-Khatib, N. Ali
Ultrasonic Assisted Eco-Friendly Dyeing Of Silk Fabrics, G. Shokry, E. El-Khatib, N. Ali
Al-Azhar Bulletin of Science
In recent years, the textile industry proceeds towards creation of new technologies to reduce the energy and water consumption. The use of ultrasonic in textile wet processing is one way to achieve that purpose. The present work investigates the effects of ultrasonic energy on dyeing of silk fabrics with Chlorophyll as a natural dye. Silk fabrics were dyed with Chlorophyll dye in an ultrasonic bath by the conventional exhaustion method. The parameters that affect the dyeing process, such as dye concentration, dye bath pH, salt concentration, and temperature, time and power energy ultrasonic values have been explored. Concentration of tannic …
Eco-Friendly Microwave Dyeing With Natural Dyes, N. Elshemy, K. Haggag
Eco-Friendly Microwave Dyeing With Natural Dyes, N. Elshemy, K. Haggag
Al-Azhar Bulletin of Science
The dyeing of cotton and viscose fabrics using turmeric and tea as natural dyes was investigated by both conventional and microwave heating methods. The extractability of turmeric and tea from natural origin using microwave was evaluated in comparison with traditional heating. The results of dye extraction indicate that microwave power is rather effective than traditional heating at low concentration and short time. Factors affecting dyeability of fabrics such as dyeing time, dye concentration, microwave power, and the aid of mordant were studied. The results of fastness properties of the dyed samples were good to excellent. The isotherm of dyeing revealed …
Synthesis Of Some Antibacterial Functional Cationic Dyes, B. Youssef, M. Ahmed, H. Mashaly, S. Mahmoud
Synthesis Of Some Antibacterial Functional Cationic Dyes, B. Youssef, M. Ahmed, H. Mashaly, S. Mahmoud
Al-Azhar Bulletin of Science
In this study, the idea is to combine the traditional dyes and functional finishing together through suitable chemical linkages, thus the whole structure may be regarded as a functional dye. Novel some new antibacterial cationic dyes weresynthesized by reacting N, N- Dimethyl (heptyl, decyl and hexadecyle) amine with anthraquinone derivatives, respectively. The structures of the synthesized dyes were fully elucidated by using FTIR, 1H-NMR, 13C-NMR and elemental analysis. All synthesized cationic dyes showed antibacterial activities. This will be discussed later in another paper.
Dyeing Behaviour Of Treated Wool With Some Metal Ions, A. Bendak, W. Raslan, M. Salama
Dyeing Behaviour Of Treated Wool With Some Metal Ions, A. Bendak, W. Raslan, M. Salama
Al-Azhar Bulletin of Science
Interaction of metal ions with wool is currently studied. The absorption of some metal ions such as copper, iron, cobalt, nickel and aluminum by wool from their aqueous salt solutions is investigated. The treatment conditions such as temperature of treatment and the pH values of metal salt solutions are interpreted. The effect of pretreatment of wool with some di- carboxylic acids on the metal uptake by wool is given. The influence of these absorbed metal ions on the dyeing properties of wool is investigated. The mechanical properties, alkali solubility, fastness properties as well as kinetic investigation on the dyeing process …
Cobalt(Ii) And Nickel(Ii) Complexes Of 2-(Arylmethyleneacetyl)Benzimidazole: Syntheses, Characterization And Antibacterial Activity, M. Abdelbaset, M. Abd-Elmottaleb
Cobalt(Ii) And Nickel(Ii) Complexes Of 2-(Arylmethyleneacetyl)Benzimidazole: Syntheses, Characterization And Antibacterial Activity, M. Abdelbaset, M. Abd-Elmottaleb
Al-Azhar Bulletin of Science
A series of Cobalt(II) and Nickel(II) complexes with 2-(Arylmethyleneacetyl)- benzimidazole (L1-L4) have been synthesized. These complexes were characterized using various physico-chemical techniques such as elemental analyses, UV-Vis, IR, thermal analyses and X-ray diffraction. Also the complexes of Co(II) and Ni(II) with 2-(Arylmethyleneacetyl)benzimidazole in solution were studied by spectrophotometric methods which used for the determination of formation constants and the stioichiometries. The stoichiometry of the complexes is established as 1:2 (M : L) by Jobs and molar ratio methods. The composition and stability constants of the complexes were determined. The antibacterial activity of these complexes against Gram positive and Gram negative …
Synthesis Of Some New Substituted Pyrimidines And Fused Pyrimidines, Ahmed Khames
Synthesis Of Some New Substituted Pyrimidines And Fused Pyrimidines, Ahmed Khames
Al-Azhar Bulletin of Science
4-(4-Chlorophenyl)-3,4-dihydro-6-methyl-5-(4-tolyl)carbamoyl-2(1H)-pyrimidinethione (1) wasreacted with benzylidenemalononitrile or ethyl cyanocinnamate to afford the pyrimidothiazine derivatives 2 and 4. Treatment of 1 withN,N-dimethylformamide-dimethylacetal (DMF-DMA) afforded 5. Acetylpyrimidine derivative 7 was produced upon treatment of 1 with mixture of acetic anhydride and acetic acid. Compound 1 was treated with chloroacetic acidto give the 5-(4-Chlorophenyl)-7-methyl-3-oxo-6-(4-tolyl)-carbamoyl-2,3-dihydro-5H-[1,3]thiazolo[3,2-a]pyrimidine (8), thione 1 was cyclized to 2-benzylidenethiazolopyrimidine derivatives 9a,b upon reaction with chloroacetic acid and aldehydes, also compound 1 was treated with 1,2-dichloroethane to give 5-(4-chlorophenyl)-7-methyl-6-(4-tolyl)carbamoyl-2,3-dihydro-5-H-[1,3]thiazolo[3,2-a]pyrimidine(10). The hydrazine derivative 11 was prepared by boiling 1 with hydrazine. Reaction of 11 with ethyl acetoacetate, DMF-DMA, acetic anhydride and 4-chlorobenzaldehyde gave 2-pyrazolylpyrimidine …