2024-03-29T10:23:01Z
https://absb.journals.ekb.eg/?_action=export&rf=summon&issue=2115
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL STUDIES OF SCHIFF BASE COMPLEXES OF TRIPOSITIVE AND DIPOSITIVE TRANSITION METAL COMPLEXES.
NAGDA
EL KHOLI
A novel tetradentate Schiff base (I) synthesized from sulfametrole [N1-(4-methoxy-1,2,5-thiadiazole-3-y1)sulfanilamide] and salciyldelyde forms stable complexes with transition metal ions such as Fe(III), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and UO2(II) in absolute ethanol. Elemental analyses, IR, 1HNMR, electronic spectra, magnetic moment, mass spectra and thermal analysis (TGA) were used to confirm the structures. From the elemental analyses data, the complexes were proposed to have the general formulae [M2Cl3(I)(H2O)5].YH2O (Where M=Co(II),Ni(II),Cu(II), Zn(II) and Cd(II), Y=0-3], [Fe2Cl5(I)(H2O)3]: 2H2O, (FeSO4)2 (I)(H2O)4]:2H2O and [(UO2)2 (NO3)3 (I) (H2O)]:2H2O. The molar conductance data reveal that all the metal complexes were non-electrolytes. The IR, 1HNMR, spectra show that ligand (I) is coordinated to the metal ion in a bidentate manner ON and via NO donor sites of the azomethine-N, phenolic-OH, enolic sulfonamide–OH and thiadiazole–N. The magnetic and electronic spectra showed that the complexes exhibit octahedral geometry. The thermal behaviour of the complexes was studied. All the prepared compounds were screened for their antibacterial and antifungal properties and have exhibited potential activities
Schiff base
Transition metal complexes
IR
1HNMR
conductance
electronic spectra
magnetic moment
Thermal analysis
Biological Activity
2007
12
21
1
14
https://absb.journals.ekb.eg/article_11110_5b7d326a87690ab28190d33b0c8006a5.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
SYNTHESIS OF NOVEL 3,6-DICHLOROBENZO[b]THIOPHENE-2-CARBONYLAMINO ACID DERIVATIVES AS POTENTIAL ANTIMICROBIAL AGENTS
H.
HASSAN
S.
SHEDID
F.
KORA
R.
EISAWY
Some new 3,6-dichlorobenzo[b]thiophene-2-carbonylamino acid ester and their corresponding hydrazide, hydrazone and peptide derivatives (II-XXXI) have been prepared. All the newly synthesized compounds are characterized by elemental analysis and spectral studies, and evaluated for antimicrobial activity.
3,6-dichlorobenzo[b]thiophene-2-carbonyl chloride
amino acid derivatives
antimicrobial activity
2007
12
01
37
46
https://absb.journals.ekb.eg/article_11112_3ea01d9619e89291a4c1b0274929e8d4.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
POTENTIODYNAMIC BEHAVIOUR OF TIN ELECTRODE IN SOME CARBOXYLIC ACIDS SOLUTIONS
R.
ABOU SHAHBA
A.
AHMED
E.
ATTIA
A.
EL- SHENNAWY
Potentiodynamic behaviour of tin electrode in citric, oxalic, maleic and malic acids was studied at room temperature. The various electrochemical parameters were calculated. In addition, the metallographic structure of tin surface electrode was examined for some solutions using scanning electron microscope (SEM). The anodic E/I curves were characterized by active - passive transition state. The anodic active region was due to the formation of soluble Sn(II) species. The passivity of tin anode was related to the hydrolysis of Sn(IV) and precipitation of Sn(OH)4 film on the anode surface. The addition of different percentages of sucrose to (1 M) of all organic acids used inhibited the anodic dissolution of tin electrode and enhanced the attainment of passivity. While the addition of sodium chloride accelerated the corrosion of tin and delayed the establishment of passivation. In citric, maleic and malic acids, inhibition was of mixed type and occurred by adsorption of SnL complex molecules following the Temkin isotherm. In case of oxalic acid the inhibition was found to be predominantly anodic occurring by adsorption of SnL2 complex and following the Langmuir isotherm.…
Potentiodynamic
TIN ELECTRODE
2007
12
01
47
61
https://absb.journals.ekb.eg/article_11114_ef9677fcaf000146ff887ff99a0a561c.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
ENHANCEMENT OF THE PHOTOCATALYTIC PROPERTIES OF TITANIA NANOPARTICLES BY DOPING LANTHANIDE IONS
ZEINHOM
EL-BAHY
ADEL
ISMAIL
REDA
MOHAMED
Lanthanide ions (La3+, Nd3+, Sm3+, Eu3+, Gd3+, and Yb3+)- doped TiO2 nanoparticles were successfully synthesized by sol-gel method to enhance the photocatalytic activity of the developed materials. The structural features of TiO2 and lanthanide ions–doped TiO2 fired at 550ºC were investigated by XRD, UV-diffuse reflectance, and nitrogen adsorption measurements. The effect of lanthanide ions-doped TiO2 on the photoactivity was evaluated by the degradation of direct blue dye (DB 53) as a probe reaction. Our findings indicated that XRD data verified the formation of typical characteristic anatase reflections without any separate dopant-related peaks in all the prepared lanthanide ion-doped TiO2 nanoparticles. The particle size of lanthanide ions-doped TiO2 nanoparticles was smaller than pure TiO2 indicating the improvement of its surface morphology. The results indicated that Gd3+-TiO2 has the lowest bandgap and particle size and the highest surface area and pore volume (Vp) as well. The photocatalytic behavior of lanthanide ions-doped TiO2 was tested for oxidation of DB 53 in the presence of UV light at λ = 365 nm. It was found that Gd3+-TiO2 is the most effective catalyst in the photocatalytic activity studies. That might be due to its special characteristics of particle size, surface texture and bandgap properties. Our results should provide a significant contribution to the understanding of the chemistry of lanthanide iondoped TiO2 systems. Details of the synthesis procedure and results of the characterization studies of the produced lanthanide ions-TiO2 are presented in this paper.
PHOTOCATALYTIC PROPERTIES
TITANIA NANOPARTICLES
DOPING LANTHANIDE IONS
2007
12
01
63
77
https://absb.journals.ekb.eg/article_11117_d2a079c3a44e4ad903fa0e8b03aed15d.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
PHYSICOCHEMICAL EFFECT OF OZONE IN ATMOSPHERE OF GREATER CAIRO AREA
M.
EMARA
S.
SOLIMAN
A.
RAMADAN
H.
ELKORDY
The surface Ozone has been determined to be human risk factor in urban environments, as well as a contributor to the formation of photochemical oxidants. Where the surface ozone is not a primary pollutant (i.e. not emitted directly by human activity), but it is produced through the action of sunlight on primary pollutants such as nitrogen oxides and hydrocarbons. Concentrations of ozone were measured at five monitoring sites located in the greater Cairo area, Egypt, as a part of the air pollution study for the effect of the volatile organic compounds and nitrogen oxides on surface ozone.
For each site, during the period from March 2003 to March 2004, we collected forty eight Ozone samples per day (every half hours), daily samples of nitrogen oxides (Nitrogen oxide & Nitrogen dioxide) and 22 abundant volatile organic compounds (VOCs) three times per day (7-9 in the morning, 2-4 afternoon and 8-10 evening).
The average ozone concentrations were found to be higher in the afternoon than in morning and nights. The morning rush hours are marked by an increase in the primary emission of NO and hydrocarbons. In the evening and night, ozone is destroyed by NO generated locally by unburned hydrocarbons from industry, traffic and thermal power plants.
PHYSICOCHEMICAL EFFECT
Ozone
CAIRO AREA
2007
12
01
79
93
https://absb.journals.ekb.eg/article_11118_309ee7915a43f73476c1823f3ca434fc.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
NEW EFFECTS OF PRINTING COTTON/POLYESTER BLENDED FABRICS USING ALKALI PRINTING
Y.
ELHAMAKY
S.
NASSAR
H.
OSMAN
D.
IBRAHIM
New printing effects on cotton/polyester blended fabrics were achieved by printing the fabrics using a printing paste containing different concentrations of sodium hydroxide, and then steamed applying different steaming time and temperatures, in order to improve the two fabrics physical properties. These changes resemble in: Decreasing fabric weight, increasing water absorbency and air permeability, shrinkage effect which cause the differential crimping effect and color tones. Factors affecting these new effects were studied and discussed in details to determine the most desirable appearance of cotton / polyester blended fabric.
PRINTING COTTON
POLYESTER BLENDED
2007
12
01
95
104
https://absb.journals.ekb.eg/article_11119_5bacc2149c209105328a7774f9e4a15c.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
SPECTROPHOTOMETRIC STUDIES TO DETERMINE THE DISTRIBUTION COEFFICIENT OF SOME METAL IONS ON ANION EXCHANGE RESIN IN PRESENCE OF E.B.T. DYE.
F.
KAMAL
S.
EL RASHID
J.
AL AHMARI
The absorption spectra of various concentrations of some metal nitrate salts; Co(II), Ni(II), Cu(II) and Cr(III) nitrate, with different concentrations of Eriochrome Black T (E.B.T) dye solutions were studied in the presence and absence of Dowex – S.B.R. anion exchange resin ( nitrate form ) . The calculated values of distribution coefficient kd illustrate the importance of the E.B.T dye solution as complexing agent for the removal of different metal ions on the Dowex – S.B.R. anion exchange resin. The same studies have been performed for samples in different molarities of nitric acid at constant concentration of E.B.T. and metal ion solution for only Co (II ) and Ni ( II ) ions since Cu ( II ) and Cr ( III ) ions precipitate in the presence of E.B.T. The nitric acid imported also a marked influence on Co and Ni ions complex formation and consequently on their kd values. Ethanol and acetone were used in different proportions to evaluate the effect of changing the dielectric constant of the medium on the kd values of the Co and Ni with E.B.T. in the studied solutions. The kd values are markedly higher in acetone – dye – metal ion - water media as compared with those obtained in aqueous – ethanol – dye – metal ion mixture at the same concentrations. The effects of pH on the absorption and kd behavior for Co (II) and Ni (II) ions in presence of E.B.T. dye on the Dowex – S.B.R. anion exchange resin were studied and discussed.
SPECTROPHOTOMETRIC STUDIES
metal ions
ANION EXCHANGE RESIN
2007
12
04
105
112
https://absb.journals.ekb.eg/article_11121_f0c12ce595c9d2461894c47b32131ffa.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
SIMULTANEOUS DETERMINATION OF HYDROCHLOROTHIAZIDE AND METHYLDOPA IN TABLETS USING FIRST DERIVATIVE SPECTROPHOTOMETRY AND PLS
AHMED
OMRAN
Two new analytical methods are described asconvenient and useful alternatives for simultaneous determination ofhydrochlorothiazide (HCTZ) and methyldopa (MD) in their combinations. The firstmethod depends on the first order derivative spectrophotometry by measuring theamplitudes at zero-crossing wavelengths of 286 and 270 nm for HCTZ and MD,respectively. In the second method, partial least squares (PLS) analysis of theultraviolet absorption spectra of the samples in the 240-340 nm region wasapplied. The methods were calibrated between 3.5 and 35.7 mg mL-1 for HCTZ and between 2.5 and 25.3 mg mL-1 for MD. For PLS chemometriccalibration a concentration set of random mixture consisting of the two drugsin ethanol was prepared. The absorbance data in UV spectra and their dA/dl values were measured for the 24 l points considering Dl= 4 nm. The calibration of the PLS method involvesboth absorbance-concentration and dA/dl-concentration data matrices. The numerical valueswere calculated by using Matlab version 6.5 and origin 7.0 software. Theresults of the methods were statistically compared with each other and a goodharmony was found. The developed calibrations were successfully applied forassaying the pharmaceutical formulation of AldorilÒ tablets
Hydrochlorothiazide
Methyldopa
Aldoril tablets
derivative spectrophotometry
PLS
2007
12
01
113
126
https://absb.journals.ekb.eg/article_11123_040f9fa417b291d2dd75a47136a4385e.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
SYNTHESIS OF PYRAZINAMIDE DERIVATIVES AS LEUCONOSTOC MESENTEROIDES GROWTH INHIBITOR AND OTHER MICROORGANISMS
ASHRAF
ABDELWAHAB
A.
EL-HADDAD
F.
EID
A.
BEDAIR
A.
ADAWY EL-DEEB
G.
EL-SHERBENY
Synthesis and reactions of 4-pyrazine-2-carboxamido carboxylic acid derivatives 3a-c were studied. Various N-[4-(5-oxo-oxazol-2-yl)-phenyl]pyrazine-2-carboxamides 7-11 were obtained via condensation of 3c with different chemical reagents. Interaction of 10b,c with p-toludine and/or hydrazine hydrate afforded the corresponding N-[4-(1H-imidazol-2-yl)phenyl]pyrazine-2-carboxamides 12a,b respectively. Antimicrobial screening showed that 3c possess a promising effect against the growth of Leuconostoc sp. and other tested Gram-positive, Gram-negative and fungi.
Thestructures of the newly derivatives were confirmed by IR, 1H NMR, 13C NMR and mass spectra studies.
4-pyrazine-2-carboxamido carboxylic acid derivatives
N-[4-(5-oxo-oxazol-2-yl)phenyl]pyrazine-2-carboxamides
N-[4-(1H-imidazol-2-yl)phenyl]pyrazine-2-carbox-amides
1,2,4-triazine-6-one derivatives
Leuconostoc sp. Growth inhibitor
2007
12
01
127
140
https://absb.journals.ekb.eg/article_11124_963632e9636b7f7d2fb06337a6b96205.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
ANTIMICROBIAL ACTIVITY OF THE REACTION PRODUCTS OF 2-ACETYL- AND 2-(2,2-DICYANO-1-METHYLVINYL)NAPHTHO[2,1-b] FURAN WITH SOME NUCLEOPHILIC AND ELECTROPHILIC REAGENTS
ASHRAF
ABD EL-WAHAB
FAWZY
ALI
AHMED
BEDAIR
AHMED
HALAWA
AHMED
EL-AGRODY
GAMAL
EL-SHERBINY
The reaction of 2-acetyl and 2-(2,2-dicyano-1-methylvinyl)naphtho[2,1-b]furan with malononitrile, phenylhydrazine, α-cyanocinnamonitriles, anisaldehyde and other differenet reagents were discussed. The structure of the reaction products were supported by 1HNMR, 13CNMR, IR and mass spectra data. The biological activity of the compounds cited in this article were reported.
2-Acetylnaphtho[2,1-b]furan
2-(2,2-dicyano-1-methylvinyl)naphtho[2,1-b]-furan
3-[(4-methoxyphenyl)- and 3-[(3-bromo-4-methoxyphenyl)-1-naphtho[2,1-b]fur-an-2-yl]prop-2-en-1-one
antimicrobial activity
2007
12
01
141
157
https://absb.journals.ekb.eg/article_11126_66754981f77306d8b6d7cee25c28438c.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
CHEMICAL REMEDIATION OF THE EFFLUENTS OF SUEZ OIL PROCESSING COMPANY
M.
EMARA
I.
EL-SABBAGH
F.
AWAD
E.
SHAHINE
The industrial wastewater treatment methods include many types of coagulation process which results from the addition and rapid mixing of coagulant with wastewater to remove suspended or colloidal waste materials. Jar test technique was used in this work where coagulants as aluminum sulphate, ferric chloride and polyacrylamide are added by a suitable percentage of each individually to predict the optimum doses of the previous coagulants. Generally the optimum dose for aluminum sulphate which affects the values of the measured parameters was 100 mg/L. The measured parameters which used to test the quality of treatment are chemical oxygen demand, suspended solids, total dissolved solids, conductivity and dissolved oxygen. The results showed that the optimum dose for ferric chloride was 75 mg/L for the treatment of the previous mentioned parameters. However, the best effective dose of coagulant aid was 30 mg/L where the oxygen content was changed to a maximum value of 5.34 mg/L while, chemical oxygen demand was varied to a minimum value of 145.61mgO2/L.
Moreover, the doses of coagulant aid were positively significant correlated to dissolved oxygen values(r=0.892, p≤.0.05) and negatively correlated to chemical oxygen demand(r=-0.855, p≤.0.05), which reflects the high efficiency of the coagulant aid in reducing the organic wastewater.
Remediation
industrial effluents
Alum
ferric chloride
2007
12
01
159
166
https://absb.journals.ekb.eg/article_11129_1de247d71ebf4a74256dd62cde86be7b.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
INTERACTION OF DIMETHYLTIN(IV) DICHLORIDE WITH, BIDENTATE AMINE: SYNTHESIS AND EQUILIBRIUM STUDIES.
MOHAMED
SHOUKRY
M.
TOLLMA
MOHAMED
SHEHAT
SABIHA
AL-MISTO
The interaction of dimethyltin(IV) with some selected aliphatic and aromatic diamines was described. A series of diamine complexes were synthesized and characterized by elemental analysis. The stoichiometry and stability constants for the complexes are estimated at 25°C and 0.lM ionic strength. The concentration distribution diagrams of the complexes were evaluated. The effect of pKa of the diamine on the stability constant of the complex was elucidated.
DIMETHYLTIN(IV) DICHLORIDE
BIDENTATE AMINE
2007
12
01
167
179
https://absb.journals.ekb.eg/article_11131_e10969868d3e38117badc8207e482585.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
AMINATION OF GLYCIDYL METHACRYLATE-G-JUTE COPOLYMER AND IT'S UTILIZATION IN THE REMOVAL OF Cu ++ IONS
A.
ABOU-OKEIL
M.
YOUSEF
M.
FIKRY
E.
EI-ALFY
Glycidyl methacrylate-g-jute copolymer of an epoxy content of 0.529 mole/100g was aminated with any of cyclohexyl amine (CRA), hexyl amine(HA) or N-ethyl butyl amine (NEBA) at different factors, including amine concentration (0.08-8 mole/l), LR(1: 10-1:40), time (15-120 min.) and temperature(30-90°C). The extent of amination depends on the type of amine and it follows the order: CHA > NEBA > HA. At optimum conditions, viz. amine concentration of 5 mole/I, LR (1:20) for 15 min. at 90°C, 3 aminated jute fibers(AJF) were prepared, viz. CRAJF, HAJF and NEBAJF with % N of 5.92, 5.27 and 5.39% respectively. AJFs were used in the removal of Cu2+ ions from aqueous solution at different pRs (2-8), CU2+ ion concentration (50-500 mg/l), AJF concentration (1-10 g/I), and time (15-180 min.). The extent of Cu2+ ion removal depends on AJF type and follows the order: NEBAJF > CHAJF > HAJF. Optimal removal conditions at room temperature (30°C) were pR 5, Cu2+ ion concentration 200 mg/l, adsorbent concentration 2g/1 and time of 180 min. The removal of Cu2+ ions by the three different AJFs follows Langmuir and Freundlich isotherms.
GLYCIDYL METHACRYLATE-G-JUTE
Cu ++ IONS
2007
12
01
181
196
https://absb.journals.ekb.eg/article_11137_54bfc7b987470f9367c69fc6e8ada5f8.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
SYNTHESIS OF NOVEL PYRAZOLE, PYRIDAZINE AND PYRIMIDINE DERIVATIVES CONTAINING SULFONAMIDO MOIETY
M.
AZAB
E.
EL-BOURDANY
S.
ABDEL-WAHAB
E.
SOLIMAN
Reaction of the hydrazone 2 with hydrazine hydrate, phenylhydrazine, benzoylhydrazine and/or semicarbazide in dioxane afforded the 3,5-diaminopyrazole derivatives 3-6, respectively. Refluxing 3 with acetic anhydride and/or benzoylchloride, furnished the N-acyl derivatives 7 and 8. On the other hand, fusion of 3 with different aromatic aldehydes produced the Schiff bases 9a-c, respectively. Treatment of 2 with urea, thiourea and/or guanidine hydrochloride furnished the pyrimidine and 1,3-thiazine derivatives 10-12, respectively. Reaction of 2 with ethyl cyanoacetate, ethyl acetoacetate, malononitrile and/or piperidine yielded the pyridazine derivatives 14 and 15, pyridopyridazine 17 and the enaminonitrile 18. Treatment of 18 with CS2 and/or phenylisothiocyanate produced 1,3-thiazine 20, dithioxopyrimidine 21 and the thiopyrimidine derivatives 22, respectively.
Sulfonamide
Hydrazones
aminopyrazoles
pyrimidines
pyridazines
2007
12
01
167
178
https://absb.journals.ekb.eg/article_11138_6e91af5bfad0002b3a39ba2154d68ada.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
SPECTROSCOPIC AND ANTIMICROBIAL STUDIES ON SOME DIH YDRAZONE-COPPER COMPLEXES
HAMDY
HAMMAD
GAMAL
EL-SHERBINY
Some dihydrazones and their copper complexes were synthesized in order to study their molecular structures and antimicrobial activities. The dihydrazones were prepared by refluxing malonyldihydrazide with some aldehydes in absolute ethyl alcohol. The complexes were prepared by indirect method where copper acetate was refluex with the aldehydes and the solution was treated with malonyldihydrazides. All the complexes are characterized by elemental analysis, magnetic, electronic and IR data. Biological activities and their statistical analysis were also determined.
Antimicrobial
YDRAZONE-COPPER COMPLEXES
2007
12
01
179
189
https://absb.journals.ekb.eg/article_11140_87444356e9226a9e0680084f1b16a1e1.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
N-METHYLOL POLYACRYLAMIDE CYCLODEXTRIN COMPOSITE AS A STIFFENING AGENT FOR COTTON FABRICS
MANAL
EL- BISI
To chemically attach β- Cyclodextrin molecules to cotton cellulose, N-methylol-acrylamide was used to synthesize a cyclodextrin containing monomer ,which was then grafted onto cellulose fibers .Cyclodextrin are cyclic oligosaccharides cable of forming inclusion complex with large number of organic molecules .The aim of this work is the preparation of activated Cyclodextrin and applied it as finishing agent on cotton fabrics to improve stiffness properties, tensile strength and Crease Recovery Angle .
β-cyclodextrin (CD)
Acrylamide (Aam)
finishing
Crease Recovery Angle(CRA)
stiffening
2007
12
03
191
201
https://absb.journals.ekb.eg/article_11141_f7edea57a3676b091e495181d0489c63.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATION OF ZSM-5 METALLOSILICATE ZEOLITES PREPARED BY ISOMORPHOUS SUBSTITUTION PROCESS
TAREK
SALAMA
Metal ions-containing ZSM-5 materials were prepared by isomrphous substitution of purely ZSM-5 using different metal ions, namely Co(II), Ni(II) and Cu(II). The metal modified ZSM-5 samples were synthesized hydrothermally in the presence of tetrapropyl ammonium bromide (TPABr) as the template and n-propyl amine (n-PrNH2) as the mobilizing agent. The structure, morphology, particle-size distribution, surface texture and acidity of these materials have been investigated and compared with ZSM-5 prepared by direct hydrothermal synthesis. The apparent effect of the substitution of Al by Co(II) ions on the crystal size results in a structural arrangement of the gel during aging-favoring nucleation.Thesurfacearea, degree of crystallinity and particle size of Co/ZSM-5 increase at the expense of pore radius, though Ni(II) and Cu(II) ions substituted ZSM-5 cause lesser effects. The M/ZSM-5 catalyst in the presence H2O2/UV is an active system for the oxidative color removal of Direct blue-1 in aqueous heterogeneous suspensions with a very low M(II)/substrate ratio. The high phase heterogeneity of Co/ZSM-5 catalyst account for the increased values of the activity than the corresponding Ni/ and Cu/ZSM-5 ones.
ZSM-5
Isomorphous substitution
In-situ FT-IR
Surface texture
particle-size distribution
XRD
photocatalysis
2007
12
01
203
220
https://absb.journals.ekb.eg/article_11143_383f0371791df995b6d4fe3805c2a2eb.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
THE TEMPERATURE DEPENDENCE OF THE ELECTRICAL CONDUCTIVITY OF DIAZADIPHOSPHETIDINE DERIVATIVES
ABD-ELNASSER
ALAGHAZ
The d.c. electrical conductivity measurements as a function of temperature of 2,2,2,4,4,4hexachloro-1,3 bis(2-chlorophenyl)-1,3,2,4-diazadiphosphetidine, (HCCIDP),2,2,2,4,4,4-hexachloro-1,3-bis(2-bromophenyl)-1,3,2,4-diazadiphosphetidine (HCBrDP), and 2,2,2,4,4,4-hexachloro-1,3-di-o-tolyl-1),2.4-diazadiphosphetidine (HCMDP) compounds have been carried out. The semiconducting properties of the investigated compounds were arising from electron delocalization via intramolecular interaction of p-electrons of (C=C) bonds and electron-donating groups in ortho positions. The conductivity was found to increase in the higher temperature range than in lower due to the trigonal bipyramidal structure which increases the possibility of electron delocalization and the interaction of p-electron system.
DC conductivity
IR and UV spectra
diazadiphosphetidine derivatives
2007
12
01
221
230
https://absb.journals.ekb.eg/article_11144_f7a810d08758f1d478f4985a55166969.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
EFFECT OF TANNIC ACID ON THE DYEING PROCESS OF NYLON 6 FABRIC WITH CATIONIC DYE
L.
EL-GABRY
M.
EL-ZAWAHRY
Nylon 6 fabric was pretreated with polar surfactant, tannic acid and subsequently dyeing with the cationic dye (Rhodamine B) solution as well as emulsion phase. The emulsion phase consisted of n-hexadecane emulsified by isopropyl alcohol and stabilized by tannic acid/Rhodamine B complex. Different factors affect the pretreatment and dyeing process have been studied. Moisture regain, tensile strength, elongation and binding stiffness were investigated. The colour strength values showed that the pretreated fabric with tannic acid which dyed with cationic dye solution as well as emulsion system were enhanced. However, dyeing the nylon 6 fabric using emulsion system improved the dyeability and fastness properties. Interestingly, the dyed fabrics with cationic dye emulsion system exhibited excellent fastness properties aftertreating with the commercial anionic fluorescent whitening agent Uvitex RSB 150%. FTIR spectra have been studied.
tannic acid
NYLON 6 FABRIC
Cationic dye
2007
12
01
231
245
https://absb.journals.ekb.eg/article_11146_5cfad7ecb58a0871b9f5efdf50d889bd.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
EFFECT OF CALCINATION TEMPERATURE OF KAOLINITE CLAY ON THE PROPERTIES OF PORTLAND CEMENT PASTES CONTAINING METAKAOLIN
M.
TAHER
A.
EL-SAYED
O.
FARGHALY
M.
SHATAT
Metakaolin (MK) is a highly reactive pozzolan produced by calcination of kaolinite clay at high temperatures. It has a high specific surface, which makes it very suitable as a cementing material in concrete. The utilization of area calcined clay, in the form of MK, as a pozzolanic material for mortar and concrete has received a considerable attention in recent years. This interest is part of the widely spread attention directed towards the utilization of wastes and industrial by-products in order to minimize Portland cement (PC) consumption, the manufacture of which being environmentally damaging. Another reason is that mortar and concrete, which contain pozzolanic materials, exhibit considerable enhancement in durability properties. In this investigation, the physico-chemical properties of artificial pozzolanic cement pastes containing MK produced by calcination of kaolinite clay at different temperatures (700, 800, 900, and 1000oC) were studied. PC was partially substituted for by 0, 5, 10, 15 and 20 % of MK by weight at different calcination temperatures. The characteristics of prepared mortars were investigated after curing in water for different periods (3, 7, 28 and 90 days) by determination of compressive strength and total porosity. The hydration kinetics was evaluated by determination of free lime contents. IR spectroscopic analysis was used to investigate the change in structure of mortars after curing. The change in morphology and microstructure of some hardened pastes were investigated by scanning electron microscopy (SEM).
Metakaolin
Pozzolan
kaolin
Blended cement
2007
12
01
277
294
https://absb.journals.ekb.eg/article_11149_e972fbaeb6a63f5bf745e25935176fb8.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
SYNTHESIS, SPECTRAL, SOLID STATE ELECTRICAL CONDUCTIVITY AND BIOLOGICAL ACTIVITY STUDIES ON SOME THIAZOLINE -CYCLODIPHOSPH(V)AZANE METAL COMPLEXES
ABD-ELNASSER
ALAGHAZ
SALWA
ELBOHY
Aminocyclodiphosph(V)azane of thiazoline, III (1,3-diphenyl-2,4-bis(2-acetyl-2-thiazolinehydrazone)-2,2,4,4-tetrachlorocyclodiphosph(V)azane, reacts with stoichio-metric amounts of transition metal salts such as Co(II), Ni(II), and Cu(II) to afford coloured complexes in a moderate to high yield. The structure of the isolated complexes was suggested based on elemental analyses, IR, molar conductance, UV-Vis, 1H and 31P NMR, solid reflectance, magnetic susceptibility measurements and dark electrical conductivity of solid state. The solid state electrical conductivity obtained reveals that the ligand (III) and its metal complexes behave as semiconducting materials. Most of the prepared compounds showed high bactericidal activity and, in some cases, the complexes have higher bactericidal activity than the ligand.
cyclodiphosph(V)azane metal complexes
electronic
IR
magnetic moment
electrical conductivity
2007
12
01
247
261
https://absb.journals.ekb.eg/article_11154_cc21a8daed75b4477824e3b727569623.pdf
Al-Azhar Bulletin of Science
1110-2535
1110-2535
2007
18
Issue 2-A
SYNTHESIS AND REACTIONS OF SOME 2-MERCAPT0-3-CYNO BENZOFURAN DERIVATIVES WITH EXPECTED BIOLOGICAL ACTIVITY
NADIA
SALEH
Benzofuran derivatives are known possess hypotensive(l), vasodilating and spasmolytic activity(2). Moreover, some benzofuran derivatives showed antibacterial activity as well as antiparasitic properties(3,4).On the other hand substituted pyridine showed herbicidal(5) and antibacterial activities(6) compounds having both pyridine and benzofuran moieties can be expected to possess marked biological activities.
2007
12
01
263
274
https://absb.journals.ekb.eg/article_11158_af5cc19e9a70dacb23a0ba14364991c5.pdf