2024-03-28T13:47:00Z
https://absb.journals.ekb.eg/?_action=export&rf=summon&issue=1401
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
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
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) was treated with each of HCOOH, C6H5CO Cl,,and CS2 and malononitrile , the novel thiazolo [3,2-a]-1,8-naphthyridine derivati -ves (10-13) were obtained.
Thiazolo[3,2-a] pyridine
thiazolo[4,5-c] pyrazole
and thiazolo[3,2-a]-1,8-naphtharyidine derivatives
2010
12
01
1
14
https://absb.journals.ekb.eg/article_7359_e410ffa05596f9e0c0abbbadceb686b7.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
CHLOROACETONITRILE IN HETERO CYCLIC SYNTHESIS; NOVEL ROUTE FOR THE SYNTHESIS OF THIAZOLIDINE, CHORMENE, PYRROLE, AND PYRAZOLE DERIVATIVES AS ANTIMICROBIAL AGENTS
GAMEEL
EL-HAG-ALI
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 of ammonium acetate afforded- N-(2-ethoxyphenyl)-2-imino-2H-chromen -3-amine (19) .The novel pyrrole derivative (20) was obtained through reaction of (16) with a mixture of 2-chlorobenzaldehyde and malononitrile.
thiazolidine
chormene
pyrazole derivatives
2010
12
01
15
26
https://absb.journals.ekb.eg/article_7361_8f7eb3a67144eed4b0d712a571f6bc68.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
CATION MODIFIED SILICATES FOR CATALYTIC PRODUCTION OF PHENOL FROM BENZENE
MEDHAT
EL-MOSELHY
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 obtained solids (Al and Fe-Silicates) have been tested in the catalytic oxidation of benzene to phenol at different temperatures. The wide structure characterization of Al and Fe modified Silicates was carried out to establish a correlation between the effects of the addition of the modified silicates on the oxidation of benzene and their structure properties. Best conversion of benzene to phenol was observed for Fe-Silicate sample. A possible explanation of Fe-Silicates activity might be related to the great surface area and acidic properties of this sample in addition to the ability of Fe (III) to be reduced to Fe (II) and vice-versa. The oxidation processes were followed up using HPLC and UV-Vis Spectrophotometer.
Fe and Al Cation modified Silicates
Benzene oxidation
H2O2
Phenol and HPLC
2010
12
01
27
42
https://absb.journals.ekb.eg/article_7363_3e137b525327489105932985dae18ec5.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
TREATMENT OF ASH LEACHATE USING DIFFERENT FUNCTIONAL GROUP ANION EXCHANGE RESINS
MEDHAT
EL-MOSELHY
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 different experimental conditions. The data obtained indicate that LAYNAERT is the most suitable anion exchanger for the removal of arsenate and selenate, whereas, IRA743 and A400 are good for the removal of boron and molybdate respectively.
Leachate water treatment
ion exchangers
oxyanions
2010
12
01
43
52
https://absb.journals.ekb.eg/article_7364_f59fd8ca884b16ba270725a7d5bd7565.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
GENERATION OF MEAT-LIKE VOLATILES FROM CYSTEINE, GLUCOSE AND SERINE MODEL SYSTEM AND ITS ANTIOXIDANT ACTIVITY
SAIED
SHEDID
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 of some volatile compounds having meat–like aroma such as 2-methyl-3-furanthiol and 2-furylmethanethiol attributes and remarkable increase in the like– roasted meaty aroma. The radical scavenging activity of cysteine, glucose and serine model system was quantified spectrophotometrically, using DPPH radical. The activity of the model system product was found to be slightly lower than that of gallic acid and BHA, but it was much higher than that of cinnamic acid (200 ppm. for each). A highly antioxidative activity was recorded by the model system which may be due to the presence of some compoundssuch as 2-furylmethanethiol, 2-acetylthiazole, 4-hydroxy-5-methyl-3(2H)-furanone.
cysteine
Meat-like aroma
Maillard reaction
Sensory evaluation
DPPH
2010
12
01
53
64
https://absb.journals.ekb.eg/article_7365_b6da78d9549293b768eab1bfcc30fe12.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
FLUORIDE REMOVAL USING ZR LOADED A500P IN COMPARISON WITH ACTIVATED ALUMINA
MEDHAT
EL-MOSELHY
ARUP
SENGUPTA
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 indicated the relatively high removal activity of Zr loaded A500P when compared with activated alumina. Furthermore, the investigation of the effect of competitive species such as SO4‑2- and PO43- indicate that both sulphate and phosphate strongly affect the rate of fluoride removal which completely suppressed by reaching 1000 ppm and 1 ppm dose from sulphate and phosphate, respectively. The variation of pH in 2-10 range indicates that the rate of fluoride removal is inversely proportional to pH. Furthermore, the lower pH shows the higher removal capacity.
A500P
Zr oxide
SO4 2-
PO43-
pH change
2010
12
01
65
78
https://absb.journals.ekb.eg/article_7366_c2537e37f6ebb4ffdda70b99130c7b09.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
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
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 20% 1, 4-dioxane has no determined because that the-amide did not soluble in water solution .The equilibrium conversion of the benzoyl benzamide was found to increase with an increase of reaction temperature and with the catalytic loading. Energy of activation (Ea) and the thermodynamics parameters such as: ∆G*, ∆H* and ∆S* were calculated by applying the Arrhenius and van’s Hoff equation in the range of temperature mentioned before.
Amide hydrolysis
Ion exchange catalysis
Hydrolysis of organic materials
2010
12
01
79
92
https://absb.journals.ekb.eg/article_7368_aae3f0fec0eb339b47d9a777c3ae2866.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
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
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 exothermic in all media under studying, at temperature range of 25–45 C.
Cadmium (II)
rice straw
Removal
2010
12
01
93
108
https://absb.journals.ekb.eg/article_7369_31fc5d48017d450e912eb37cea676ecc.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
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
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 exothermic in nature.
copper
rice straw
Removal
2010
12
01
109
124
https://absb.journals.ekb.eg/article_7504_8e74ff1dda563a4b9ef0e38937d0a5fd.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
PHOTOCATALYTIC DEGRADATION OF DIRECT BLUE-1 DYE ON ZrO2, SULPHATED ZrO2 AND V2O5-ZrO2/SO4 CATALYSTS
IBRAHEEM
ALI
ABUDELRHMAN
MOHMED
MOHMED
THABET
Sulfated (5wt.%) ZrO2 and non-sulfated ZrO2 modified by NH4VO3 using incipient wetness impregnation technique to achieve a loading of 5wt.% V2O5 were thoroughly characterized by means of X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy, N2 sorptiometry, particle size analyzer and pyridine-FT-IR that was used to investigate the acidity of the samples. Degradation of direct blue-1 (DB) dye was tested for the effectiveness of the samples. The results revealed that DB degradation was highly improved with V supported on ZrO2–SO4 and showed a conversion comprises of 95% after UV irradiation (emitting at 365 nm) for 60 min exceeding that of SO4 free ZrO2 sample (68%) obtained at the same period of illumination. This was due to the large surface area (183 m2 g-1), small crystallites size and presence of basic sites namely O2− and OH− moieties, those take part in the reaction as additional oxidizing agents. The photocatalytic degradation of DB was found to follow first order rate kinetics. More information on the activity, surface texturing, kinetics and TOC removal were well evaluated, compared and discussed for all samples.
acidity
Kinetics
Photodegradation
Degradation of direct blue-1 dye
Sulfated zirconia
texturing
2010
12
01
125
144
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
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
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.
acidity
Kinetics
Photodegradation
Degradation of direct blue-1 dye
Sulfated zirconia
texturing
2010
12
01
145
158
https://absb.journals.ekb.eg/article_7372_1fe4fa5ebc88850a8259502ce3b8075c.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
OPTIMIZED AND VALIDATED SPECTROPHOTOMETRIC METHODS FOR THE DETERMINATION OF CLOMIPRAMINE AND PAROXETINE HYDROCHLORIDE IN DRUG FORMULATIONS
H.
ELQUDABY
E.
FRAG
GEHAD
MOHAMED
M.
MOHAMED
Two simple and sensitive spectrophotometric methods have been developed for the determination of some anti-depressant drugs such as clomipramine (CLO) and paroxetine (PRX). The methods involved the formation of ion-pairs between the inorganic complexes of molybdenum(v) thiocyanate and hexakis iron(III) solution followed by extraction with 1,2- dichloroethane. The optimum conditions for the ion-pairs formation were established under which Beer,s low was obeyed for CLO and PRX in the concentration range 5-150 and 10-250 μg mL-1 for the first method, while it was obeyed for the second method in the concentration range of 10 - 200 μg mL-1 for both CLO and PRX drugs, respectively. The limits of detection were 0.0744 and 0.109 μg mL-1 and 0.177 and 0.113 μg mL-1 for CLO and PRX using the first and second methods, respectively. The limits of quantification for the first method were 0.223 and 0.531 μg mL-1 while they were 0.327 and 0.340 μg mL-1 using the second method for CLO and PRX drugs, respectively. Both of the two methods have been successfully applied for the determination of the cited drugs in row materials and in drug formulations and compared with the official reference methods. Complete validation of the proposed methods was done.
ion-pair
molybdenum(V)-thiocyanate
hexakis iron(III)-thiocyanate
clomipramine
Paroxetine
2010
12
01
159
172
https://absb.journals.ekb.eg/article_7505_909e4dc1623d1b6161561a7a8e6d277f.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
STUDY OF POLYMETHACRYLIC ACID /SESBANIA GUM COMPOSITE AS THICKENING AGENT IN PRINTING WITH REACTIVE DYES
I.
ABD EL-THALOUTH
M.
REKABY
A.
RAHMAN
SH.
EL-KHABERY
Galactomannan gum was isolated from Sesbania seeds and subjected to chemical modification via grafting with methacrylic acid monomers using potassium persulphate as intiator. The rheological properties of the prepared composites before and after storing for three and seven dyes were thoroughly investigated .Furthermore; the obtained composite was evaluated as thickening agent in reactive dye printing pastes of cotton fabrics. It was found that poly methacrylic acid / Sesbania seeds gum composites could be used as a substitute for sodium alginate in printing cotton fabrics with reactive dyes, where samples acquire soft handle, K/S and overall fastness properties were obtained, nearly equal to those printed using sodium alginate. These composites are compatible with sodium alginate and their mixture at a ratio of 1:1 (wt/wt), improving the K/S than that of pure sodium alginate.
POLYMETHACRYLIC ACID
SESBANIA GUM COMPOSITE
Thickening agent
PRINTING WITH REACTIVE DYES
2010
12
01
173
188
https://absb.journals.ekb.eg/article_7374_5bc42d48c164800988924d683fa7ba98.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
ALKALI ACTIVATION OF CERAMIC WASTE
F.
NASSAR
M.
MOSTAFA
M.
SARAYA
T.
EL SOKKARY
E.
EL-FADALY
H.
EL-DIDAMONY
In ceramic tile production, because of various reasons, unsold fired products come out. These are waste tiles and only a little part of them are used. If these waste tiles were used in geopolymer production, this pollution decreases. In this study, usage of waste tile as pozzolan was studied. In this paper the effect of sodium silicate solution with different molar ratio on the compressive strength the synthesis of Egyptian ceramic waste -based geopolymers is investigated. Eight different alkaline solutions with different soluble silica contents were used to activate ceramic waste. The primary reaction product was a sodium aluminosilicate gel, while different types of zeolites appeared as minority phases. The percentage and composition of these reaction products were found to depend on both the soluble silica content present in the activating solutions and curing time. In addition, the amount of gel was observed to have a decisive effect on the mechanical strength developing in the material. X-ray diffract grams of geopolymers indicated the existence of the major amorphous phases of ceramic waste, as well as the formation of a new amorphous phase in the geopolymeric matrices. Fourier-transform infrared (FTIR) spectroscopy analysis revealed essential ceramic waste phase transformations within geopolymers that affected their mechanical strength. The results of the current research indicate that a compressive strength is increased with the increase of alkali content, as well as with the increase of sodium silicate in the synthesis of geopolymers.
alkali activation
ceramic waste
Compressive strength
DTA
XRD
FT-IR
2010
12
01
189
206
https://absb.journals.ekb.eg/article_7375_f321e9c2a67b5a52af48efb10c8d8b2e.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
SEWAGE TREATMENT USING NEW DEVELOPED TECHNIQUES
MOSTAFA
EMARA
FARAG
AHMED
AHMED
ABDEL RAZEK
Sewage is water-carried wastes, in either solution or suspension that is intended to flow away from a community .It is more than 99.9% pure water and is characterized by its volume or rate of flow, its physical condition, its chemical constituents, and the bacteriological organisms that it contains. Domestic sewage causes a problemto environment so that the treatment and disposal of wastewater is not only desirable but also necessary (1). In this study, we are concerned with the sewage treatment using different techniques. Two major techniques were applied for wastewater treatment, namely biological and chemical treatments. In biological treatment we constructed a pilot and bench scale for applying the two aerobic and anaerobic techniques to reduce some of the studied parameters as BOD, COD, nitrogen and phosphorous at the optimum condition from used time and sludges and compared these results with effluents from plant. In chemical treatment the jar test technique was used where coagulants matter as alum, ferric chloride and polymer are added by a suitable dose of each coagulants.
Sewage Treatment
2010
12
01
207
220
https://absb.journals.ekb.eg/article_7376_5aba6906942751b53aa48ca4dd57ce31.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
MORPHOLOGICAL, THERMAL AND ELECTRICAL STUDIES ON CHITOSAN HEAVY METAL COMPLEXES
M.
HUSAIN
M.
EL-HADY
W.
SAYED
H.
HEFNI
The chitosan was prepared and mixed with some metal salts (FeCl3, Co(CH3COO)2 and NiCl2) with different concentrations to form chitosan-metal complexes. The characterizations of these complexes were carried out by FTIR and their morphological studies were carried out by scanning electron microscope (SEM) and wide angle X-ray diffraction apparatus. The thermo gravimetric analysis (TGA) and differential scanning calorimetric (DSC) also were carried out. The metal ions which strongly complexed to the amino groups of chitosan like Fe+++ showed a smooth surface product, amorphous phase and thermally more stable than other complexes. The chitosan-metal complexes have a higher electrical conductivity than chitosan compounds at room temperature.
morphological
THERMAL
ELECTRICAL STUDIES
2010
12
01
221
238
https://absb.journals.ekb.eg/article_7377_3f3ab5b662b58f973c726281a3103d99.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
SYNTHESIS OF A NEW SERIES OF AMINO ACID DERIVATIVES OF SUBSTITIUTED COUMARIN AND ITS ANTIMICROBIAL ACTIVITY APPLICATIONS
M.
ZAHER
A.
EL-AGRODY
H.
HASSAN
A.
FARRAG
A series of new substituted coumarin amino acid derivatives have been synthesized, characterized and screened for their (In Vitro) antimicrobial activity against Gram-positive and Gram-negative bacteria as well as for their antifungal activity and (In Vivo) application against plant pathogenic fungus, Fusarium oxysporium the causal agent of beans (Phaseolus vulgaris .L.), plant wilt disease Interestingly, our results show available antimicrobial response of the newly substituted coumarins in two main aspects firstly, (in vitro) the inhibition potential and the types of the effective coumarins compounds tested were more upon the filamentous plant pathogenic fungi than on both Gram positive and Gram-negative bacteria tested ,this may give an indication that the mechanism of the inhibition that exerted upon filamentous fungi as Eukaryotic representative class is completely different from that upon bacteria as Prokaryotic representative class .Secondary,.( In Vivo), some of thenewly substituted coumarins can successfully inhibit the growth of plant pathogenic fungus as Fusarium oxysporium in a different degrees.
Coumarin
Amino acids
antimicrobial activity
plant pathogenic fungi
Fusarium wilt disease
Beans Plants (Phaseolus. Vulgaris L.)
2010
12
01
239
250
https://absb.journals.ekb.eg/article_7378_25516ce98ccbba7a28bae283714fcb6c.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
ZIZIPHUS SPINA – CHRISTI AS GREEN CORROSION INHIBITOR FOR AL-CU ALLOY IN ACIDIC AND ALKALINE MEDIA.
SEHAM
ABDEL MOTAAL
HIND
AL-MALKI
Ziziphus Spina – Christi extract (ZSC) was investigated as green corrosion inhibitor for Al-Cu alloy in acidic and alkaline media using chemical and electrochemical techniques. The weight loss results were interpreted by means of the kinetic –thermodynamic isotherm of extract adsorption on the alloy surface. The values of ranged from -5.08 to -23.43 kJ/mol revealed a strong physical and spontaneous adsorption of the ZSC on the alloy surface. The higher inhibition efficiency about 91.08% and 85.60% was observed at 8.0 g/L in 2.0M HCl and 1.5M NaOH. Activation parameters, ,and supporting the proposed physisorption mechanism. Potentiodynamic polarization measurements showed that the presence of ZSC extract in both media affects mainly the cathodic process, and decreases the corrosion rate to a great extent. The results obtained from weight loss and thermometric measurements are in a good agreement with potentiodynamic polarization measurements.
Al alloy corrosion
Ziziphus Spina-Christi extract
Inhibitor
and adsorption
2010
12
01
251
266
https://absb.journals.ekb.eg/article_7379_6f6cd29ad39c06f6ac85d7e4f9ca3461.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
RP HPLC DETERMINATION OF BENZHEXOL HYDROCHLORIDE IN TABLET FORMULATIONS AND URINE
RABIE
FARAG
SABAH
MOLTAZRM
ASHRAF
AHMED
A new, rapid and sensitive reverse phase HPLC method was developed and validated for the determination of benzhexol hydrochloride in tablet formulations and urine. The mobile phase used is acetonitrile and water, ( 50 % v/v ) and the pH was adjusted to 5 using phosphoric acid. The separation was achieved on C18 reversed-phase column (250 mm x 4 mm i.d.). The flow rate was 0.6 ml/min and UV detection is at 254nm. The retention time for benzhexol hydrochloride was 7.4 min. The calibration curve was linear up to 40 µg/mL. The mean recovery for benzhexol hydrochloride is 101.16. The assay was precise within day and between days. The method provided excellent sensitivity, recovery, accuracy and reproducibility in therapeutic or toxic concentrations. Common excipients do not interfere.
Benzhexol hydrochloride
Reverse phase HPLC
C18 reversed-phase column
2010
12
01
267
274
https://absb.journals.ekb.eg/article_7380_70424e7d4b0792bac2186735bec1001c.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
PREPARATION AND CHARACTERIZATION OF THE LOW ENERGY PORTLAND CEMENT
E.
EL-ALFI
A.
OTHMAN
A.
HASSAN
M.
SARAYA
R.
ABD EL-GAYED
Synthesis of Portland cement clinker from kiln feed raw materials containing zinc carbonate was studied. The kiln feed of the Portland cement was substituted by different contents of zinc oxide (0.0, 0.5, 1.0 and 1.5 wt. %). The ingredients of mixes were intimately homogenized, mixed, molded into a compact mass and fired at 1250, 1275, 1300 and 1325oC for two hours soaking time. The burnability of each sample was investigated by the determination of insoluble residue, free lime contents and phase composition of the fired products. The data show that the clinker formation was completed at 1300oC in the presence of 0.5-1.5 wt. % zinc oxide. Also, the prepared low energy cement has good hydraulic properties than those of the ordinary portland cement.
Preparation
THE LOW ENERGY PORTLAND CEMENT
2010
12
01
275
286
https://absb.journals.ekb.eg/article_7381_bd3df59c4cc15cf864d86c0a4eb63008.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
ALKYL OLEATE SUCCINIC ANHYDRIDE AS A NEW MODIFICATION OF INTERNAL PAPER SIZING AGENT
M.
ABOUL-FETOUH
F.
NASSAR
A.
TANTAWY
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.
ALKYL OLEATE SUCCINIC ANHYDRIDE
INTERNAL PAPER SIZING AGENT
2010
12
01
287
294
https://absb.journals.ekb.eg/article_7382_79fc933a54f6462280f77b24b10befc4.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
STUDIES ON THE BINARY AND TERNARY COMPLEXES OF ALUMINIUM(III) WITH GALLIC ACID AND ADRENALINE
MAHMOUD
MOUSTAFA
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.
Mixed-ligand Complexes
aluminium
Gallic acid
L-adrenaline
Complexation equilibria
Stability constants
Spectral
Potentiometry
2010
12
01
295
308
https://absb.journals.ekb.eg/article_7383_a5ead4f12bb213beb24bfba7232ef59a.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
STUDIES ON THE CATALYTIC HYDROLYSIS OF BENZAMIDE BY Bi–Mo–O CATALYSTS
M.
WASSEL
R.
SABER
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 calcinations time . In all steps of study the reaction rate is characterized by the presence of an induction period, in which the reaction velocity is slow, after which it is accelerated appreciably, is proposed that this period is sequence of the formation of some active sites on the surface of the catalyst. These active sites resemble themselves as ions (Mo+5 ) resulting form side reaction between (Bi+3) ions and (Mo+6) ions according to the following equation : Mo+6 + Bi+3 Mo+5 + Bi+3 + e where the increase in formed (Mo+5) ions leads to the increase of the active sites, and consequently an increase in the reaction velocity. The activity in the catalytic hydrolysis of benzamide found to follow the following sequence of the prepared catalysts: Bi2O3 - MoO3 < Bi2O3 - 2MoO3 < Bi2O3 - 3MoO3 < Bi2O3 - 3MoO3 (30hrs) < Bi2O3 - 3MoO3 (60hrs) < Bi2O3 - 3MoO3 (90hrs) < Bi2O3 - 3MoO3 (120hrs).
Mixed-ligand Complexes
aluminium
Gallic acid
L-adrenaline
2010
12
01
309
324
https://absb.journals.ekb.eg/article_7384_2e0e4c8b6e98f08526a72194a0a4bb96.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
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
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.
Sulfonamide
hydrazone
1,3,4-thiadiazole,
1,3,4-thiadiazine
4-oxothiazolidine
pyrazolo[5,1-c][1,2,4]triazine
2010
12
01
325
344
https://absb.journals.ekb.eg/article_7385_3e246e517e84f30331886b659f6873d4.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
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
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 at different pHs. Column application was also studied.
CATION EXCHANGER-MANGANESE (II) SILICATE
Fe, Ce, V, W ELEMENTS
2010
12
01
345
362
https://absb.journals.ekb.eg/article_7386_16ff389e0b81eacbef7ba0a0d3f46cb4.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
FICUS CARICA AND OLIVE LEAVES AS ENVIRONMENTAL FRIENDLY CORROSION INHIBITORS FOR ZINC IN HCL SOLUTION.
SEHAM
ABDEL MOTAAL
NOHA
AL-QASMI
The inhibiting action of Ficus carica and Olive extracts on the corrosion process of zinc in 2.0 M HCl solution has been investigated by weight loss, open –circuit potential and potentiodynamic polarization measurements. The results revealed that, the highest efficiency (IE%) was observed at 20.0 g/l of inhibitor. Langmuir isotherm was investigated to clarify the nature of adsorption. The values of are low revealed to a physical adsorption of the extracts on the zinc surface. The effect of temperature range (25-55ºC) supporting the proposed physical adsorption. Electrochemical behaviour indicated that the extract act as anodic- type inhibitors.
zinc
Ficus
olive
acid medium
Inhibitor
Polarization
2010
12
01
363
378
https://absb.journals.ekb.eg/article_7388_4c3c61e48043231f5d19eade14a3bf07.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2010
21
Issue 2-A
STUDY AND EVALUATION OF AROMATIC EXTRACTS AS FLUIDS FOR CALCIUM COMPLEX LUBRICATING GREASES
R.
EL-ADLY
M.
KAMEL
A.
ALY
H.
ABD EL-BARY
Utility of aromatic extracts as fluid for preparation of calcium complex greases was investigated. The physicochemical properties of three grades of these extracts were initially studied. The rheological behavior (viscosity, shear stress and shear rate) of the individual aromatic extracts, and the obtained greases from those extracts at different temperatures were also illustrated. The rheological properties of both aromatic extracts and all lubricating greases were properly fit with the mathematical model of Herschel-Bulkley. Moreover, the flow behavior of the aromatic extracts as well as the corresponding lubricating greases was non-Newtonian. The study exhibited promising results concerning the thermal, mechanical and rheological properties for the prepared greases. Hence, in this work the by-product aromatic extracts act as a good alternative fluid for calcium complex lubricating greases.
Aromatic extracts
Calcium complex greases
Rheological properties
Non Newtonian
Herschel-Bulkley
2010
12
01
379
389
https://absb.journals.ekb.eg/article_7387_60a9aacbe2249bae13be15bec518962c.pdf