eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
1
20
10.21608/absb.2006.11636
11636
Original Article
NEW APPROACH FOR IMPARTING ANTIMICROBIAL PROPERTIES FOR POLYAMIDE AND WOOL CONTAINING FABRICS
S. ABO EL-OLA
samiham_2000@yahoo.com
1
Textile Research Division National Research Center Dokki, Cairo, Egypt.
Direct fiber polymer/antibiotic interaction is a promising means of providing infection resistance textile fabrics. Ionic interaction between cationic reactive groups (antibiotic) and carboxylic groups in wool, wool/polyamide, wool/polyester and polyamide was used as tools to develop desirable durable antimicrobial fabrics. The finishing conditions such as pH, finishing temperature, and time were studied.
The results revealed that pH of the finishing bath and the antibiotic concentration as well as finishing temperature were very critical parameters in affecting exhaustion of the antibiotic by the fabric along with the extent of ionic interactions. Sorption of doxymycin antibiotic follows the descending order: wool>wool blends>polyamide. Zone of inhibition of all treated fabrics is governed by the pH and follows the descending order:
pH 6.5 > pH9 > pH 2.3.
FTIR Spectroscopy confirmed the ionic interaction between wool 100 %, wool/polyamide (50%/50%) and doxymycin, because of appearance of new bands at 1641cm-1 which attributed to NH2 deformation amide I and band at 1514 cm-1 corresponding to amide II { in case of wool 100 %}.For wool/polyamide blend it is noticed that appearance of new bands at 1415 cm-1 corresponding to C-N stretching (amide III band for CONH2 ,in addition to the appearance of new band at 927 cm-1which corresponding to CO-NH in plane.
Reusing of the treatment bath was tried and proved to be very effective approach to produce infection resistant biomaterials for medical applications.
https://absb.journals.ekb.eg/article_11636_89c9eccb413d863ad4d15ce006f6b523.pdf
wool
wool blends
doxymycin
biomaterial
Durability
Reusing
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
21
30
10.21608/absb.2006.11637
11637
Original Article
IMPROVEED COMPATIBILITY BETWEEN POLYSTYRENE and POLY (VINYLIDENE FLUORIDE) BY THE ADDITION OF UREA
OMAR MELAD
1
OMAR ABU-TIEM
2
EHAB SOBEH
3
Department of Chemistry, Al-Azhar University, P.O.Box 1277, GAZA, Palestine.
Department of Chemistry, Al-Azhar University, P.O.Box 1277, GAZA, Palestine.
Department of Chemistry, Al-Azhar University, P.O.Box 1277, GAZA, Palestine.
The viscosity behaviour of dilute solution of Polystyrene-Poly(vinylidene fluoride) in dimethylformamide (DMF) in presence of urea has been studied at 25°C. The results show that the polymer mixtures are incompatible in DMF solution in the absence of urea. The influence of urea addition on the degree of compatibility of the polymer mixture has been studied in terms of the compatibility parameters (,,, and ) respectively.
https://absb.journals.ekb.eg/article_11637_fb502565eb8912f59bd105c62f270892.pdf
Urea addition
Poly(vinylidene fluoride)
Polymer blend compatibility
dilute solution viscometry method
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
31
51
10.21608/absb.2006.11638
11638
Original Article
SYNTHESIS AND BIOLOGICAL EFFECT OF SOME THIENO[2,3-D] PYRIMIDINE-4-(3H) ONE
NADIA SMEISS
1
NADIA SALEH
2
FIVIAN NOFEL
3
M. NASHWA
4
Chemistry Department, Al-Azhar University (Girls), Faculty of Science, Cairo, Egypt.
Chemistry Department, Al-Azhar University (Girls), Faculty of Science, Cairo, Egypt.
Pharmacology Department, National Research Center, Cairo, Egypt.
Chemistry Department, Al-Azhar University (Girls), Faculty of Science, Cairo, Egypt.
Interaction of thiophene enamino ester 1a,b with the acid chloride of p-tolyl sulphonamido-N-acetic acid derivatives 2a-cafforded the corresponding amide derivatives respectively 3a-f. Hydrazinolysis of 3a-f with hydrazine hydrate yielded 4a-f. Diazotization of 1a then coupling with different amines gave 6a,b. compounds 7a,b was afforded when diazonium chloride of p-toludin or enamino thiophene 3-carboxylate (5) was reacted with compound 1a. Air oxidation of 6a yielded 8. Coupling was carried out with different amines compounds where 5 yielded 9a,b. According to Gewald method 11a-b was prepared from reaction of 10a,bwith malononitrile, From 11a,bwe can prepare compounds 13, 14a-c, 15a-c 16a,b, 17a,b, 18, 19 and 20.
The structure of these compounds was confirmed by infrared, mass, H-NMR spectra the biological activity of some compounds were discussed and found to be active.
https://absb.journals.ekb.eg/article_11638_f3a93afb0e536b663a96618cc362edb5.pdf
Biological effect
THIENO[2,3-D] PYRIMIDINE-4-(3H) ONE
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
53
63
10.21608/absb.2006.11639
11639
Original Article
NOVEL AND QUICK SENSOR RESPECTIVE FOR SULFATE
WAGIHA MAHMOUD
1
MOHAMED ABO ALY
2
MOHAMED HAMZA
3
Department of Chemistry, faculty of science, Ain Shams University, Cairo , Egypt.
Department of Chemistry, faculty of science, Ain Shams University, Cairo , Egypt.
Department of Chemistry, faculty of science, Ain Shams University, Cairo , Egypt.
A sulfate-selective PVC-membrane sensor based on nickel complex of 3, 8-dimethyl 5, 6-benzo- 4, 7-diazadece-3, 7-diene-2, 9-dione (dioxime) as (a novel sensing material) is presented. The Potentiometric behavior of the sensor was independent on the pH of the solution between 4.5 and 7.5 pH. The sensor revealed a linear response towards SO42− ion in the range of 5.0×10−7to 1.0×10−2 M with an anionic slope of -30±0.2 mV per decade. The sensor possesses a satisfactory reproducibility, fast response time, low limit of detection (3×10−7M).The interference of hydrophobic inorganic anions was very low in comparison with the conventional ion-exchanger based electrodes, as shown by the selectivity coefficients determined by the separate solution method (SSM). The selectivity was also good towards the most common univalent and divalent anions. The sensor was used as an indicator electrode in potentiometric titration of sulfate with barium ions and in determination of sulfate in some pharmaceutical products .
https://absb.journals.ekb.eg/article_11639_844fb9ed87efd34f3a7d12b17c5e6445.pdf
Sulfate ion-selective sensor
3, 8-dimethyl 5, 6-benzo- 4, 7-diazadece-3, 7-diene-2, 9-dione (dioxime)
PVC-membrane
Potentiometry
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
65
75
10.21608/absb.2006.11640
11640
Original Article
SYNTHESIS OF SOME NOVEL PYRIDINE, THIOPHENE, THIENOPYRIMIDINE AND THIENOPYRIDINE DERIVATIVES CONTAINING BENZOFURANYL MOIETY
J. MICKY
1
N. SALEH
2
N. SHEMISS
3
S. MOHAMED
4
Chemistry Department, Faculty of Science (Girl’s), Al-Azhar University–Nasr City, Cairo, Egypt.
Chemistry Department, Faculty of Science (Girl’s), Al-Azhar University–Nasr City, Cairo, Egypt.
Chemistry Department, Faculty of Science (Girl’s), Al-Azhar University–Nasr City, Cairo, Egypt.
Chemistry Department, Faculty of Science (Girl’s), Al-Azhar University–Nasr City, Cairo, Egypt.
Interaction of 2-[1-(4,6-dimethoxybenzofuran-5-yl)ethylidine]malononitrile (1) with phenylisocyanate, phenylhydrazine, carbon disulphide and arylidenemalono-nitrile afforded the corresponding pyridine 2, pyrido[2,3-d] pyrimidine 3, phenylhydrazone 4,pyridine 2,6-dithione 8 and benzene dicarbonitrile 9 derivatives . Treatment of 1 with elemental sulfur under Gewald reaction conditions furnished 2-amino-4-(4,6-dimethoxybenzofuran-5-yl)thiophen-3-carbonitrile 11 which used as starting material in the synthesis of thienopyrimidine 14 and thienopyridine 15 derivatives.
https://absb.journals.ekb.eg/article_11640_d6a63a6e9024e721079c5242be9a7142.pdf
Pyridine
THIOPHENE
THIENOPYRIMIDINE
THIENOPYRIDINE
BENZOFURANYL
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
77
84
10.21608/absb.2006.11641
11641
Original Article
SYNTHESIS AND CHARACTERIZATION OF 2,6- AND 2,7- DISUBSTITUTED BIPHENYLENS
OMAR ABOU-TEIM
1
Department of Chemistry, Faculty of Science, Al-Azhar University, P.O. Box 1277 Gaza, Palestine
Many 2,6-disubstitued biphenylenes were prepared which are expected to have liquid crystal properties; also 2,7-disubstituted biphenylenes, which might also show mesogenic properties, were synthesized.
https://absb.journals.ekb.eg/article_11641_308c43f0bc6429574da254e2865d5a5b.pdf
Biphenylene
liquid crystal
misogynic properties
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
85
101
10.21608/absb.2006.11642
11642
Original Article
A PRELIMINARY TECHNO-ECONOMIC STUDY ON DYEING POLYAMIDE 6 FABRIC
W. RASLAN
1
A. BENDAK
2
Textile Research Division, National Research Centre Dokki, Cairo, Egypt
Textile Research Division, National Research Centre Dokki, Cairo, Egypt
Attempts are undertaken to perform a comparative techno-economic investigation of two dyeing methods of polyamide fabrics; a conventional dyeing method normally as applied in industry versus a proposed modified one which depends on the usefulness of chemical pretreatment of polyamide fabric with acetaldehyde or a redox system at ambient conditions. The tensile strength and elongation percentage of the pretreated polyamide 6 fabrics are unchanged by the aforementioned treatments while the dyeability of the pretreated fibres can be enhanced at lower dyeing temperature.
The economic aspects of the dyeing processes are pursued, where the variables are brought together, to determine the production costs. The pretreatment of polyamide 6 with either reagent reveals some improvements in dyeing characteristics. This is reflected on the possibility of saving considerable amount of energy, shortening the time of dyeing, increasing the production rate and so lowering the total cost of the dyeing process as well as reducing the environmental impacts.
https://absb.journals.ekb.eg/article_11642_7e1e4883f78a9826a694d8658cbc70eb.pdf
polyamide
Treatment
redox system
Aldehyde
techno-economic
dyeability
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
103
111
10.21608/absb.2006.11643
11643
Original Article
ADSORPTIVE STRIPPING VOLTAMMETRIC DETERMINATION OF TRACE CLOMIPRAMINE HYDROCHLORIDE AT CARBON PASTE ELECTRODE
ANWAR WASSEL
1
National Organization for Drug Control and Research, P.O, 29, Cairo, Egypt .
A highly adsorptive stripping procedure for trace determination of the antidepressant drug Clomipramine hydrochloride was described. The drug was accumulated on a carbon paste electrode and a well-defined oxidation peak was obtained in acetate buffer pH 5.0.The method was based on controlled adsorptive accumulation of the drug for 150 sec. at a carbon electrode followed by voltammetric measurement of the surface species. By anodic adsorptive linear sweep (LSV) and differential pulse voltammetry (DPV), the voltammetric response at carbon paste electrode yields a linear calibration graph from Clomipramine hydrochloride 4x10-9 to 2x10-8 mol L-1 and4x10-11 to 2x10-10 mol dm 3 for LSV and DPV , respectively. The voltammetric response is evaluated with respect to the pre-concentration potential and time, concentration dependence, detection limits, reproducibility and other variables. The method was applied for the determination of Clomipramine in diluted urine samples and in pharmaceutical preparations, the mean recovery was 101.06%.
ANWAR A. WASSEL
https://absb.journals.ekb.eg/article_11643_a38013649ec1955af11ba67b5ca6cbb5.pdf
Clomipramine hydrochloride
Carbon paste electrode
Stripping voltammetry
Differential Pulse Voltammetry
Pharmaceutical
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
113
126
10.21608/absb.2006.11644
11644
Original Article
SYNTHESIS AND STRUCTURAL STUDIES ON COII-Y AND A UNIQUE COII(HYDRAZONE)/Y ZEOLITES USING THEM AS EFFICIENT ALTERNATIVES FOR NOBLE METAL CATALYSTS
AYMAN AHMED
1
Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt.
CoII(SBSH)/Y has been prepared by solid-solid interaction of CoII-Y with salicylidinebenzenesulphonylhydrazone ligand using the flexible ligand method and its activity toward CO oxidation was examined and compared with CoII-Y. The composition and structure of this new catalyst have been identified. The prepared zeolites have been characterized by elemental analysis, FTIR, UV-Vis., magnetic measurements, XRD and thermal (TG, DTA) as well as surface area measurements and nitrogen adsorption studies. The results showed that the Co(II) ions in zeolite-Y are coordinated with the ligand through the (C=N), (NH), (SO2) and (OH) groups with replacing of one proton from the latter group forming 3:1 metal - ligand encapsulated complex differs completely from that prepared in solution. The resulting catalyst was found to be thermally stable up to 1000 °C. Adsorption of CO at room temperature on CoII-Y and CoII(SBSH)/Y showed peaks characteristic to CO2 (as an oxidation product) and different Co-carbonyl species which indicated the presence of different oxidation states of cobalt. The FTIR spectra indicated the presence of carboxyl group and different carboxylate species after CO adsorption at room temperature (RT). It is concluded that, the oxidation of CO on Con+ (n ≤ 2) sites is already starting at room temperature and hence it may be considered as an efficient alternative for noble metal catalysts used in the CO oxidation reaction.
https://absb.journals.ekb.eg/article_11644_ba8a26a422ddb5b99b2b9f45c130f83a.pdf
Zeolite encapsulated CoII -hydrazone complexes
FL method
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
127
138
10.21608/absb.2006.11645
11645
Original Article
NEW APPROACHES FOR DYEING POLYESTER WITH INDIGO DYES
Polyester fabric was successfully dyed with indigo dyes using Iron(II) salt complex and dextrose as a substitute for sodium hydrosulphite. The dyeing efficiency of these systems were compared with those of the conventional system using sodium hydrosulphite. Results of the color strength of the obtained dyeings are higher than those for hydrosulphite. Furthermore, dyeings obtained with the new reducing systems exhibit very good fastness properties. Rubbing fastness on polyester dyed with indigo is superior to that on cotton.
https://absb.journals.ekb.eg/article_11645_299942d2a366286f2e4be2fddc78dc09.pdf
dyeing
Hydrosulphite
Iron complexes
Dextrose
Reduction
Indigo dyes
polyester
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
139
146
10.21608/absb.2006.11646
11646
Original Article
CATION EXCHANGE DISTRIBUTION BEHAVIOR OF SOME ELEMENTS IN AMMONIUM SULFAMATE-AQUEOUS-DIOXAN MEDIA ON TULSION T – 42H ORGANIC CATION EXCHANGER
Ion Exchange distribution coefficient Kd-values have been measured for the partition of some metal ions, between Tulsion T–42 NH4 - form and a media which contain organic - aqueous - Sulfamate systems. A decreasing behavior of the distribution coefficients with the increase of sulfamate solution has been observed. The influence of change of the dielectric constant (DC) of the sorption medium has been also evaluated by using 10%, 20%, 30% and 40% (v/v) of the dioxan solution. Based on the calculated Kd - values obtained from the experimental data, several useful separations have been suggested and investigated for some binary systems under study.
https://absb.journals.ekb.eg/article_11646_68ecd3480e15a44e10e5b1373fea21e0.pdf
CATION EXCHANGE
ORGANIC CATION EXCHANGER
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
147
159
10.21608/absb.2006.11647
11647
Original Article
ON THE RECOVERY OF RARE EARTH ELEMENTS FROM LOW GRADE EGYPTIAN MONAZITE BY SULPHURIC ACID PROCESS
K. RABIE
1
M. ABD El-MONEM
2
I. ISMAIL
3
O. HELALY
4
I. SALAMAA
ibrahim.salama@gmail.com
5
Nuclear Materials Authority, Rare Earth Elements Separation Project, P.O.Box 530 El-Maadi, Cairo, Egypt.
Chem. Eng. Dept., Faculty of Engineering, Cairo University, Cairo, Egypt.
Chem. Eng. Dept., Faculty of Engineering, Cairo University, Cairo, Egypt.
Nuclear Materials Authority, Rare Earth Elements Separation Project, P.O.Box 530 El-Maadi, Cairo, Egypt.
Nuclear Materials Authority, Rare Earth Elements Separation Project, P.O.Box 530 El-Maadi, Cairo, Egypt.
The sulphuric acid process has the ability of treatment all types and grades of monazite sand economically in industrial scale, so it was chosen for this study to digest the Egyptian monazite sand concentrate of assaying 48.5% purity and grain size of -100 mesh. The results of digestion experiments that verify the maximum digestion efficiency of monazite sand which reaches (93.7%) were obtained at temperature of 220°C, acid/monazite ratio of 1.6/1, digestion time of 2.5 hrs and acid concentration of 93%. The related extraction efficiency of rare earths was 93.3%.
Separation of rare earths by precipitation from the resultant clear sulfate solution after leaching, decantation and filtration was carried out using ammonium hydroxide (17.5%). The results of these experiments reveal that the dilution ratio of 17.5/1 (parts of water to one part of the original digested monazite sand weight) verifies efficient separation. At this dilution ratio the precipitation efficiency of rare earths was 98.2% at pH 3.3.
https://absb.journals.ekb.eg/article_11647_4a6fcec9cdb069ac6ab717943174221f.pdf
Monazite
Rare Earths
Sulphuric acid digestion and Precipitation
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
161
170
10.21608/absb.2006.11648
11648
Original Article
SYNTHESIS OF SOME NEW SUBSTITUTED MERCAPTOMETHYL PYRIMIDINES OF POSSIBLE BIOLOGICAL ACTIVITY
NAHED ABD EL-GHAFFAR
1
NADIA DAWOOD
2
BAHYIA EL.SADEK
3
Chemistry Department , Faculty of Science , Al-Azhar University, Nasr City, Cairo.
Chemistry Department , Faculty of Science , Al-Azhar University, Nasr City, Cairo.
Chemistry Department , Faculty of Science , Al-Azhar University, Nasr City, Cairo.
4,6-Diaryl-2-mercaptomethyl pyrimidine derivatives (IIa,b) and (IIIa,b) were prepared. The reaction of IIa with phenylisothiocyanate afforded the corresponding N-phenylthiocarbamoyl derivative (IV) which was used as an intermediate for the synthesis of 1,3,4-thiadiazole (V), 1,3,4-triazole-2-thione-(VII) and 1,3,4-oxadiazole (VI)-5-methyl merca-ptopyrimidines. 1,3,4-Triazol-2-thione-5-methylmercaptopyrimidine(VII) was subjected to Mannich reaction. The reaction of 2-amino 1,3,4-thioadiazole-5-methyl mercaptopyrimidine (Vb) with active methylene compounds was also studied structural assignment of the prepared compounds were based on elemental and spectral data.
Some of the prepared compounds were screened in vitro for their antibacterial activity.
https://absb.journals.ekb.eg/article_11648_dbdde9cc09c8fd3f1d6df3e9b9237eec.pdf
MERCAPTOMETHYL PYRIMIDINES
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2006-06-01
17
Issue 1-A
193
222
10.21608/absb.2006.11649
11649
Original Article
STUDIES ON CYCLODIPHOSPHAZANES : SOME REACTIONS OF CYCLODIPHOSPHAZANES WITH AROMATIC AMINES AND THEIR COORDINATION BEHVAIOUR TOWARDS SOME TRANSITION METAL IONS
CARMEN SHARABY
csharaby@yahoo.com
1
SALWA HASSAN
2
Chemistry Department, Faculty of Science, Al-Azhar University (Girls), Nasr City,
Chemistry Department, Faculty of Science, Al-Azhar University (Girls), Nasr City,
The reaction of 2,2,2,4,4,4-hexachlorocyclodiph(V)azanes with some amino compounds, 2-aminopyridine, 2-aminothiazole, 2-nitroaniline, 2-aminothiophenol and aminomethyl pyridine in acetonitrile afforded the geminal aminocyclodiph(V)azans of type (L1-L6). Reactions of these products with solid sulfur led to the formation of disulfo-derivatives of type (L7-L10) and their coordination behaviours, Fe(III), Mn(II), Fe(II), Ni(II), Co(II), Cu(II), Zn(II) and Cd(II) were studied. The structure of the products was proposed on elemental analyses, IR, 1HNMR, mass spectra, electronic spectroscopic studies, magnetic susceptibility, thermal studies (TGA) and conductivity measurements. The antimicrobial activities of the ligands and their complexes were evaluated.
https://absb.journals.ekb.eg/article_11649_d41d8cd98f00b204e9800998ecf8427e.pdf
geminal aminocyclodiph(V)azenes
disulfo-derivatives
Transition metal complexes