eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
1
16
10.21608/absb.2013.6463
6463
Original Article
SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF THIOUREA CONTAINING POLYMERS
F. ABDEL HAI
1
H. ABDEL WHHAB
2
G. AHMED
3
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
N-acryloyl-N-phenylthiourea (APTU) is synthesized by reacting acryloyl chloride with phenylthiourea in the presence of triethylamine (TEA) as a base and characterized by FT-IR, 1H-NMR and mass spectra. The acrylic polymers from different feed ratios of ethylacrylate (EA), methylmethacrylate (MMA), styrene (St) and APTU have been prepared by emulsion polymerization in water containing sodium lauryl sulfate as a surfactant and ammonium persulfate as a water-soluble radical initiator. The polymers are characterized by FT-IR spectroscopy. The solubility is tested in various polar and non-polar solvents. The molecular weight and polydispersity are determined using gel permeation chromatography (GPC).Thermal behavior of the prepared polymers is also investigated by thermogravimetrical analysis (TGA). The polymers are tested for their antimicrobial activities against selected microorganisms.
https://absb.journals.ekb.eg/article_6463_3ff3df97bcaf7da8035280a0f22e89ff.pdf
thiourea
acrylic polymers
Thermal properties
Activation energy
antimicrobial activity
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
17
32
10.21608/absb.2013.6467
6467
Original Article
SYNTHESIS AND ANTIMICROBIAL EVALUATION OF SOME NEW PYRIDINE-2(1H)-THIONES, NICOTINAMIDES ,THIENO[2,3-B]-PYRIDINES, PYRIDO[3',2':4,5 ]- THIENO[3,2-D]PYRIMIDINES AND PYRIDO[3',2':4,5]THIENO[3,2-D][1,2,3]- TRIAZINES CONTAINING ANTIPYRINE MOIETY.
ISMAIL OTHMAN
1
Chemistry Department , Faculty of Science, Al-Azhar University, Assiut, Egypt.
N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)-3-oxobutanamide (1) reacts with arylidinecyanothioacetamides 2a–c in ethanol/piperidine solution under reflux to yield the pyridine-2(1H)-thiones 5a–c. Compound 5a reacts with α-haloketones 6a–e to give the nicotinamide derivatives 7a–e, which cyclized to thienopyridine derivatives 8a–e. The reaction of compound 8a with formamide, phenyl isothiocyanate and hydrazine hydrate afforded the pyridothienopyrimidine derivatives 9, 11 and thienopyridine carbohydrazide derivative 12 respectively. Also, the reaction of 12 with phenyl isothiocyanate under reflux gave the thienopyridine derivative 14. Condensation of 8b,c with DMF-DMA afforded the corresponding 3-[(dimethylamino)methylene)-amino]thienopyridine derivatives 15a,b, which cyclized into the pyridothienopyrimidine derivatives 16a,b. Self coupling of compounds 8b,c were occurred through their diazotization where, the corresponding pyridothienotriazine derivatives 17a,b were obtained. Most of the target compounds were then evaluated for their antimicrobial and antifungal activities.
https://absb.journals.ekb.eg/article_6467_d41d8cd98f00b204e9800998ecf8427e.pdf
Antipyrine 3-oxobutanamide
pyridine-2(1H)-thiones
nicotinamides
thienopyridines
pyridothienopyrimidines
pyridothienotriazines
Biological Activity
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
33
48
10.21608/absb.2013.6471
6471
Original Article
STUDIES ON THE PREPARATION MODIFIED CHITOSAN AND ITS APPLICATIONS
M. WASSEL
1
A. SWLEM
2
S. SHAMA
3
A. HAMODA
4
A. DESOUKY
5
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
CChemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department , Faculty of Science, Banha University, Banha, Egypt.
Hydrogeochemistry department, Desert Research Center, Cairo, Egypt.
Hydrogeochemistry department, Desert Research Center, Cairo, Egypt.
Chitosan, as a natural polysaccharide, has reactive amino and hydroxyl groups in its linear polyglucosamine chains, can be used to functionalize and modify. However, conventional modification method using single chitosan crosslinking with glutaraldehyde generally leads to decrease of functional groups (–NH2–) and loading capacity, it's interested to prepare multifunctional chitosan-X which used in many applications such as water treatment by using diethylenetriamine pentaacetic acid (DTPA) with sufficient number of carboxyl groups on the backbones, is a commonly used as chelating agent for heavy metal. The preparation of modified chitosan investigated by IR, XRD, SEM and also mechanical properties which determined the comparative and competitive adsorption of some metal ions from aqueous solutions. Kinetic and thermodynamics of single system were studied.
https://absb.journals.ekb.eg/article_6471_216c73282c12c68db92800568a3f2967.pdf
Chitosan
crosslinking
DTPA
Mechanical Properties
application
Resine
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
49
64
10.21608/absb.2013.6475
6475
Original Article
PHYSICOCHEMICAL STUDIES ON THE SURFACE WATER OF RIVER NILE AND ITS CANALS
M. WASSEL
1
G. EL-KADY
2
S. EL-DEMERDASHE
3
A. MAHMOD
4
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry department, Desert Research Center, Cairo, Egypt.
Chemistry department, Desert Research Center, Cairo, Egypt.
The study of surface water chemistry mainly based on the results of the chemical analysis which carried out for the thirty-nine (39) collected water samples. The analysis includes the determination of the different properties of water such as electric conductivity(EC), hydrogen ion concentration (pH), total dissolved salts (TDS), turbidity , major ions as cations ( Ca2+, Mg2+,Na+, K+),anions (CO₃2⁻,HCO₃⁻ ,SO₄2⁻,Cl⁻) together with some minor and trace components as PO₄3⁻,NO₃⁻,Pb2+,Cd2+,Sr2+ . Based on the chemical analysis data of surface water of the main irrigation system (River Nile and its Canals) the conclusions could be outlined as follows: Water salinity, Distribution of total water hardness, Distribution of major ions Hydro chemical coefficients, Hypothetical salts assemblages.
https://absb.journals.ekb.eg/article_6475_cf9ad0ac4d5693fecf4f6ac29676856e.pdf
surface water
River Nile
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
65
83
10.21608/absb.2013.6480
6480
Original Article
INVESTIGATE THE ADSORPTION KINETICS AND ISOTHERM MODELS OF Pb(II) IONSREMOVAL BY RESINEXTMK-8 STRONG ACID CATION EXCHANGE RESIN.
M. WASSEL
1
A. SWELAM
2
A. EL-ZAREF
3
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
In the present study we investigated the adsorption kinetics and isotherm models of Pb(II) removal by ResinexTM K-8 strong acid cation exchange resin at different temperatures. Adsorption kinetics is investigated to develop an understanding of controlling reaction pathways (e.g. chemisorptions versus physisorption) and the mechanisms (e.g. surface versus intraparticle diffusion) of adsorption reactions. Kinetic data can be used to predict the rate at which the target contaminant is removed from aqueous (pure water) and aqueous-organic solutions (formic, acetic, propionic) and equilibrium adsorption isotherms are used to quantify the adsorptive capacity of an adsorbent. The results can be used to assess the utility of the adsorbent for the heavy metal removal, in particular Pb(II) ions adsorption, in the field scale.
Thermodynamic parameters, the Gibbs free energy change (∆G), enthalpy change (∆H), and entropy change (∆S), were calculated and show that adsorption of Pb(II) ions is spontaneous and endothermic in nature.
https://absb.journals.ekb.eg/article_6480_6dae94880cf5e7895a324fd81e3b1b59.pdf
Cation exchange resin
lead (II) ions
Adsorption kinetics
adsorption mechanism
organic acids
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
85
100
10.21608/absb.2013.6484
6484
Original Article
NEW ANTIMICROBIAL COATING COMPOSITIONS BASED ON 3,6-DICHLORO BEZO[B]THIOPHENE-2-CARBONYL GLUTAMIC ACID. (DCBTGA) . MODIFIED POLYESTERAMIDE RESINS AS BINDER FOR INDUSTRIAL APPLICATIONS
RAAFAT. EL-EISAWY
1
H. ABD EL-WAHA
2
F. ABD EL-HAI
3
M. YOUSSEF
4
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department, Faculty of Nature and Applied Science, Umaru Musa Yar'Adua University, Katsina, Nigeria
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department, Faculty of Nature and Applied Science, Umaru Musa Yar'Adua University, Katsina, Nigeria
Thiophene and their derivatives products are some of the oldest and best known class of nitrogen and sulphur containing compounds. In recent years there has been considerable interest in the thiophene -based family of materials due to the wide range of antimicrobial activity properties when incorporated into polymers and their composites. In this research new modified polyesteramide resin compositions which are prepared by partial replacement of phthalic anhydride (PA) with 3,6-dichloro bezo[b]- thiophene-2carbonyl glutamic acid (DCBTGA), as a new source of the dibasic acid and as preservative against microbiological attack with N, N- bis - (2-hydroxyethyl) linseed oil fatty acid amide (HELA) as source of polyol. These new source of dicarboxylic acid materials and new modified polyesteramide resin are confirmed by IR and NMR spectral analysis. The coating performance of the resins is evaluated using international standard test methods (ASTM) and involved the measurement of phyisco- mechanical properties such as viscosity, drying time, specular gloss, pencil hardness, adhesion, flexibility and The results show that the modification enhances both phyisco- mechanical and chemical properties The new antimicrobial polyesteramide resins is characterized using standard (Kathon LX biocide) in different excess – OH formulations to reach the best formula against bacteria and fungi. The studies showed promising results as biocide coatings.
https://absb.journals.ekb.eg/article_6484_5a82ca3b8541f16b9e0a5f125611f850.pdf
Polyesteramide
3,6-dichloro-bezo[b]-thiophene-2carbonyl-glutamic acid(II)
Antimicrobial
Biocide
Surface coating
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
101
116
10.21608/absb.2013.6489
6489
Original Article
EVALUATION OF SURAFACE WATER IN RIVERNILE AND CANALS FOR IRRIGATION PURPOSES
M. WASSEL
1
G. EL-KADY
2
S. EL-DEMERDASHE
3
A. MAHMOD
4
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry department, Desert Research Center, Cairo, Egypt.
Chemistry department, Desert Research Center, Cairo, Egypt.
In this paper we carried out the determination of the different properties of water such as electric conductivity(EC), hydrogen ion concentration (pH), total dissolved salts (TDS), turbidity , major ions as cations ( Ca2+, Mg2+, Na+, K+), anions (CO₃2⁻, HCO₃⁻ ,SO₄2⁻, Cl⁻). The results indicate that an increase in total, temporary and permanent hardness with increasing water salinity in all surface water according to the change of water type from fresh to saline water. This is mainly attributed to the effect of leaching and dissolution of soluble salts leading to the increase of hardness with particular importance to the effect of NaCl concentration on increasing solubility of Ca2+ and Mg2+ in water. This does not exclude the contribution of CO2, influence of salty water and cation exchange process. The results show that the increase in the salinity of river Nile and canals is due to the increase in readily soluble salts (NaCl, Na2SO4, NaHCO3) which is generally less than that of permanent and temporary hardness salts [MgSO4, CaSO4, MgCl2, Mg(HCO3)2 and Ca(HCO3)2].
https://absb.journals.ekb.eg/article_6489_b68f8d29faba459ac62356f531ba216c.pdf
SURAFACE WATER
RIVERNILE
Irrigation
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
117
124
10.21608/absb.2013.6490
6490
Original Article
KINETICS AND THERMODYNAMIC BEHAVIOR OF SOME PREPARED BENZIMIDAZOLE AND CHROMENE DYES ON POLYESTER FIBRE.
M. ABOUL-FETOUH
1
S. SHAKRA
2
A. GHATTAS
3
F. EL SAYED HASSAN
4
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Textile Research Division, National Research Center, Dokki, Cairo, Egypt.
Chemistry Department, Faculty of Science, Sohag University, Sohag, Egypt.
Chemistry department, Desert Research Center, Cairo, Egypt.
Diffusion as a function of temperature of benzimidazole and chromene dyes. It is well known that a carrier is not required for the dyeing of polyester at temperature exceeding 100◦ C (high temperature dyeing process). This is due to the fact that the diffusion coefficient increases with rising temperature. The extent of this increase was found by measuring exhaustion curves at different temperatures.
https://absb.journals.ekb.eg/article_6490_5c701878321a957c48d54e0fc0102cc0.pdf
Benzimidazole
CHROMENE DYES
POLYESTER FIBRE
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
125
140
10.21608/absb.2013.6491
6491
Original Article
DYEING BEHAVIOR AND PERFORMANCE OF PREPARED BENZIMIDAZOLE AND CHROMENE DISPERSE DYES AS APPLIED ON POLYESTER FIBRE, AND ITS BLENDS WITH WOOL.
S. SHAKRA
1
M. ABOUL-FETOUH
2
A. GHATTAS
3
F. HASSAN
4
Textile Research Division, National Research Center, Dokki, Cairo, Egypt .
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department, Faculty of Science, Sohag University, Sohag, Egypt.
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Azo disperse dyes Ia-f - Va-f were synthesized from corresponding amines, where IR and visible spectra were evaluated. The prepared dyes were used for dyeing polyester, polyester woolen type and wool fibres.A range of bright and leveled shade have been obtained on application of these disperse dyes. The K/S values for various dyed substrate are in the following order, Wool > polyester/wool > polyester.
https://absb.journals.ekb.eg/article_6491_150ffdad249578d8a149a4c5c208e0f0.pdf
DYEING BEHAVIOR
Benzimidazole
Chromene
POLYESTER FIBRE
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
141
156
10.21608/absb.2013.6492
6492
Original Article
EFFECT OF LIMESTONE ON THE HYDRATION CHARACTERISTICS OF PORTLAND-POZZOLANA CEMENT MORTARS
MOSTAFA EMARA
1
SALAH ABO-EL-ENEIN
2
EISA HEKAL
3
MOHAMED BDEL-WAHAB
4
Chemistry Department , Faculty of Science, Al-Azhar University, Cairo , Egypt.
Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
Quality and Laboratories Department, Helwan Cement Company, Cairo, Egypt.
The aim of this work is to utilize some Egyptian by-products such as granulated blast-furnace slag (GBFS) and fired clay or waste clay bricks known as Homra to produce economic blended cement. The effect of addition of limestone as a filler on the hydration characteristics of such blended cements was investigated. The effect of artificial pozzolana (waste clay bricks) and GBFS in the absence and presence of limestone on the physico-chemical and mechanical properties of the hardened cement pastes was studied. A various dry cement blends were prepared by mixing of ordinary Portland cement (OPC) with waste clay bricks (WCB) or GBFS as partial replacement of OPC (0, 10, 20 and 30%) and the optimum constitution was established as 10%. Other cement blends were also prepared by partial replacement of OPC by limestone (LS) (0, 2.5, 5.0 and 7.5 %) and the optimum composition was found to be 5%. This was followed by mixing of the optimum constitution of 85 % OPC: 10 % GBFS: 5 % LS and 85 % OPC: 10 % WCB: 5 % LS blends. Each of cement blend was mixed with water using the standard water of consistency and the setting time was determined. The physico-chemical properties of the hardened mortars, made of each cement blend with a ratio of 1:3 of cement blend:sand a water/solid ratio of 0.50, were tested for compressive strength, chemically combined water content and free water content at different ages of hydration of 1, 3, 28 and 90 days. In addition, thermal analysis and X-ray diffraction analysis were carried out on some selected samples.
https://absb.journals.ekb.eg/article_6492_d00e2a3201c01de92ca93e4e80e80cfe.pdf
limestone
Waste clay bricks
Granulated blast-furnace slag
Ordinary Portland Cement
Physico-chemical properties
eng
Al-Azhar University, Faculty of Science (Boys)
Al-Azhar Bulletin of Science
1110-2535
2636-3305
2013-06-01
24
Issue 1-A
157
168
10.21608/absb.2013.6493
6493
Original Article
PERFORMANCE ENHANCEMENT OF ASPHALT PAVEMENT
A. SALEH
1
M. EL-SHAFIE
2
G. ELKADY
3
M. WASSEL
4
E. GHALLY
5
Petroleum Applications Department, Egyptian petroleum Research Institute, Cairo, Egypt.
Petroleum Applications Department, Egyptian petroleum Research Institute, Cairo, Egypt.
Applied Chemistry Department, Faculty of Science, Al-Azhar University, Cairo, Egypt.
Chemistry Department, Faculty of Science, Al-Azhar University, Cairo, Egypt.
El-naser General Contracting Company (Hassan M. Allam), Cairo, Egypt.
Age hardening of paving grade asphalt is a major factor affecting the durability of bitumen pavement. In this research, 60/70 penetration grade asphalt is modified using Styrene Butadiene Rubber(SBR) in percentages by weight of asphalt ranging from 2 to 6% and 1% by weight of asphalt of an antioxidant namely 4.4. thio bis (6- tertiary butyl – m – cresol (TBMTBP). The antioxidant is used to delay the age hardening . Hot mixes asphalt using the virgin and modified asphalt samples are prepared and evaluated using Marshall test method . Fourier Transform Infra Red (FTIR) is used to analyze all samples of asphaltic materials. The results reveled that, the polymer increased the performance of hot mix and the antioxidant delayed the formation of carbonyl group which is formed as a result of asphalt aging. So, this type of modification is considered as an attractive solution for increasing the performance and the service lifetime of asphalt mix .
https://absb.journals.ekb.eg/article_6493_6075d3cab46e0dca6ffc0c0317df63b0.pdf
Asphalt
aging
antioxidant
SBR