Al-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601NEW APPROACH FOR IMPARTING ANTIMICROBIAL PROPERTIES FOR POLYAMIDE AND WOOL CONTAINING FABRICS1201163610.21608/absb.2006.11636ENS. M.ABO EL-OLATextile Research Division National Research Center Dokki, Cairo, Egypt.Journal Article20060209Direct 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<sup>-1</sup> which attributed to NH<sub>2</sub> deformation amide I and band at 1514 cm<sup>-1</sup> corresponding to amide II { in case of wool 100 %}.For wool/polyamide blend it is noticed that appearance of new bands at 1415 cm<sup>-1</sup> corresponding to C-N stretching (amide III band for CONH<sub>2</sub> ,in addition to the appearance of new band at 927 cm<sup>-1</sup>which 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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601IMPROVEED COMPATIBILITY BETWEEN POLYSTYRENE and POLY (VINYLIDENE FLUORIDE) BY THE ADDITION OF UREA21301163710.21608/absb.2006.11637ENOMARMELADDepartment of Chemistry, Al-Azhar University, P.O.Box 1277, GAZA, Palestine.OMARABU-TIEMDepartment of Chemistry, Al-Azhar University, P.O.Box 1277, GAZA, Palestine.EHABSOBEHDepartment of Chemistry, Al-Azhar University, P.O.Box 1277, GAZA, Palestine.Journal Article20060107The 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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601SYNTHESIS AND BIOLOGICAL EFFECT OF SOME THIENO[2,3-D] PYRIMIDINE-4-(3H) ONE31511163810.21608/absb.2006.11638ENNADIA A.SMEISSChemistry Department, Al-Azhar University (Girls), Faculty of Science, Cairo, Egypt.NADIA M.SALEHChemistry Department, Al-Azhar University (Girls), Faculty of Science, Cairo, Egypt.FIVIAN F.NOFELPharmacology Department, National Research Center, Cairo, Egypt.M. S.NASHWAChemistry Department, Al-Azhar University (Girls), Faculty of Science, Cairo, Egypt.Journal Article20060208Interaction of thiophene enamino ester <strong>1a,b</strong> with the acid chloride of p-tolyl sulphonamido-N-acetic acid derivatives 2a-cafforded the corresponding amide derivatives respectively <strong>3a-f</strong>. Hydrazinolysis of <strong>3a-f</strong> with hydrazine hydrate yielded <strong>4a-f</strong>. Diazotization of <strong>1a</strong> then coupling with different amines gave <strong>6a,b</strong>. compounds <strong>7a,b</strong> was afforded when diazonium chloride of p-toludin or enamino thiophene 3-carboxylate <strong>(5)</strong> was reacted with compound <strong>1a</strong>. Air oxidation of <strong>6a</strong> yielded <strong>8</strong>. Coupling was carried out with different amines compounds where <strong>5</strong> yielded <strong>9a,b</strong>. According to Gewald method <strong>11a-b</strong> was prepared from reaction of <strong>10a,b</strong>with malononitrile, From <strong>11a,b</strong>we can prepare compounds <strong>13, 14a-c, 15a-c 16a,b, 17a,b, 18, 19 and 20</strong>.
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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601NOVEL AND QUICK SENSOR RESPECTIVE FOR SULFATE53631163910.21608/absb.2006.11639ENWAGIHA H.MAHMOUDDepartment of Chemistry, faculty of science, Ain Shams University, Cairo , Egypt.MOHAMED M.ABO ALYDepartment of Chemistry, faculty of science, Ain Shams University, Cairo , Egypt.MOHAMED S.HAMZADepartment of Chemistry, faculty of science, Ain Shams University, Cairo , Egypt.Journal Article20060210A 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 SO<sub>4</sub><sup>2−</sup> ion in the range of 5.0×10<sup>−7</sup>to 1.0×10<sup>−2</sup> 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<sup>−7</sup>M).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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601SYNTHESIS OF SOME NOVEL PYRIDINE, THIOPHENE, THIENOPYRIMIDINE AND THIENOPYRIDINE DERIVATIVES CONTAINING BENZOFURANYL MOIETY65751164010.21608/absb.2006.11640ENJ. A.MICKYChemistry Department, Faculty of Science (Girl’s), Al-Azhar University–Nasr City, Cairo, Egypt.N. M.SALEHChemistry Department, Faculty of Science (Girl’s), Al-Azhar University–Nasr City, Cairo, Egypt.N. M.SHEMISSChemistry Department, Faculty of Science (Girl’s), Al-Azhar University–Nasr City, Cairo, Egypt.S. A.MOHAMEDChemistry Department, Faculty of Science (Girl’s), Al-Azhar University–Nasr City, Cairo, Egypt.Journal Article20060110Interaction of 2-[1-(4,6-dimethoxybenzofuran-5-yl)ethylidine]malononitrile <strong>(1) </strong>with phenylisocyanate, phenylhydrazine, carbon disulphide and arylidenemalono-nitrile afforded the corresponding pyridine <strong>2</strong>, pyrido[2,3-d] pyrimidine <strong>3</strong>, phenylhydrazone <strong>4</strong>,pyridine 2,6-dithione <strong>8</strong> and benzene dicarbonitrile <strong>9</strong> derivatives . Treatment of <strong>1</strong> with elemental sulfur under Gewald reaction conditions furnished 2-amino-4-(4,6-dimethoxybenzofuran-5-yl)thiophen-3-carbonitrile <strong>11</strong> which used as starting material in the synthesis of thienopyrimidine <strong>14 </strong>and thienopyridine <strong>15</strong> derivatives.https://absb.journals.ekb.eg/article_11640_d6a63a6e9024e721079c5242be9a7142.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601SYNTHESIS AND CHARACTERIZATION OF 2,6- AND 2,7- DISUBSTITUTED BIPHENYLENS77841164110.21608/absb.2006.11641ENOMARABOU-TEIMDepartment of Chemistry, Faculty of Science, Al-Azhar University, P.O. Box 1277 Gaza, PalestineJournal Article20060210Many 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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601A PRELIMINARY TECHNO-ECONOMIC STUDY ON DYEING POLYAMIDE 6 FABRIC851011164210.21608/absb.2006.11642ENW. M.RASLANTextile Research Division, National Research Centre Dokki, Cairo, EgyptA.BENDAKTextile Research Division, National Research Centre Dokki, Cairo, EgyptJournal Article20060210Attempts 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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601ADSORPTIVE STRIPPING VOLTAMMETRIC DETERMINATION OF TRACE CLOMIPRAMINE HYDROCHLORIDE AT CARBON PASTE ELECTRODE1031111164310.21608/absb.2006.11643ENANWAR A.WASSELNational Organization for Drug Control and Research, P.O, 29, Cairo, Egypt .Journal Article20180826<span style="font-size: 9.0pt; mso-fareast-font-family: AdvPS_TTR; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: EN-US;">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 <sup> </sup>Clomipramine hydrochloride 4x10<sup>-9</sup> to 2x10<sup>-8 </sup>mol L<sup>-1</sup> and4x10<sup>-11</sup> to 2x10<sup>-10 </sup>mol dm<sup> 3 </sup>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%.</span>
<span style="mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: EN-US;">ANWAR A. WASSEL</span>
https://absb.journals.ekb.eg/article_11643_a38013649ec1955af11ba67b5ca6cbb5.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601SYNTHESIS AND STRUCTURAL STUDIES ON COII-Y AND A UNIQUE COII(HYDRAZONE)/Y ZEOLITES USING THEM AS EFFICIENT ALTERNATIVES FOR NOBLE METAL CATALYSTS1131261164410.21608/absb.2006.11644ENAYMAN H.AHMEDDepartment of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt.Journal Article20060110Co<sup>II</sup>(SBSH)/Y has been prepared by solid-solid interaction of Co<sup>II</sup>-Y with salicylidinebenzenesulphonylhydrazone ligand using the flexible ligand method and its activity toward CO oxidation was examined and compared with Co<sup>II</sup>-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), (SO<sub>2</sub>) 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 <sup>°</sup>C. Adsorption of CO at room temperature on Co<sup>II</sup>-Y and Co<sup>II</sup>(SBSH)/Y showed peaks characteristic to CO<sub>2</sub> (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 Co<sup>n+</sup> (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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601NEW APPROACHES FOR DYEING POLYESTER WITH INDIGO DYES1271381164510.21608/absb.2006.11645ENJournal Article20060210Polyester 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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601CATION EXCHANGE DISTRIBUTION BEHAVIOR OF SOME ELEMENTS IN AMMONIUM SULFAMATE-AQUEOUS-DIOXAN MEDIA ON TULSION T – 42H ORGANIC CATION EXCHANGER1391461164610.21608/absb.2006.11646ENJournal Article20060209Ion Exchange distribution coefficient K<sub>d</sub>-values have been measured for the partition of some metal ions, between Tulsion T–42 NH<sub>4</sub> - 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 K<sub>d</sub> - 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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601ON THE RECOVERY OF RARE EARTH ELEMENTS FROM LOW GRADE EGYPTIAN MONAZITE BY SULPHURIC ACID PROCESS1471591164710.21608/absb.2006.11647ENK.RABIENuclear Materials Authority, Rare Earth Elements Separation Project, P.O.Box 530 El-Maadi, Cairo, Egypt.M.ABD El-MONEMChem. Eng. Dept., Faculty of Engineering, Cairo University, Cairo, Egypt.I.ISMAILChem. Eng. Dept., Faculty of Engineering, Cairo University, Cairo, Egypt.O.HELALYNuclear Materials Authority, Rare Earth Elements Separation Project, P.O.Box 530 El-Maadi, Cairo, Egypt.I.SALAMAANuclear Materials Authority, Rare Earth Elements Separation Project, P.O.Box 530 El-Maadi, Cairo, Egypt.Journal Article20060211The 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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601SYNTHESIS OF SOME NEW SUBSTITUTED MERCAPTOMETHYL PYRIMIDINES OF POSSIBLE BIOLOGICAL ACTIVITY1611701164810.21608/absb.2006.11648ENNAHEDABD EL-GHAFFARChemistry Department , Faculty of Science , Al-Azhar University, Nasr City, Cairo.NADIADAWOODChemistry Department , Faculty of Science , Al-Azhar University, Nasr City, Cairo.BAHYIAEL.SADEKChemistry Department , Faculty of Science , Al-Azhar University, Nasr City, Cairo.Journal Article200601154,6-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.pdfAl-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253517Issue 1-A20060601STUDIES ON CYCLODIPHOSPHAZANES : SOME REACTIONS OF CYCLODIPHOSPHAZANES WITH AROMATIC AMINES AND THEIR COORDINATION BEHVAIOUR TOWARDS SOME TRANSITION METAL IONS1932221164910.21608/absb.2006.11649ENCARMEN M.SHARABYChemistry Department, Faculty of Science, Al-Azhar University (Girls), Nasr City,0000-003-3738-6130SALWA A.HASSANChemistry Department, Faculty of Science, Al-Azhar University (Girls), Nasr City,Journal Article20060109The 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 (L<sup>1</sup>-L<sup>6</sup>). Reactions of these products with solid sulfur led to the formation of disulfo-derivatives of type (L<sup>7</sup>-L<sup>10</sup>) 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, <sup>1</sup>HNMR, mass spectra, electronic spectroscopic studies, magnetic susceptibility, thermal studies (TGA) and conductivity measurements. The antimicrobial activities of the ligands and their complexes were evaluated.