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- Chemistry (21)
- Mathematics, Statistics, Computer Science, Physics and Astronomy (18)
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- Earth science (4)
- 6-dichloro-bezo[b]-thiophene-2carbonyl-glutamic acid(II); Antimicrobial; Biocide; Surface coating (1)
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- Adsorption; Malachite green; adsorption isotherms; water; hyacinth stems (1)
- Antimicrobial agents; ACTINOBACTER SP (1)
- Antimicrobial agents; ANAEROBIOSIS; PROTEIN SYNTHESIS (1)
- Aquifer; GEOTECHNICAL; gravity; karst; resistivity; Risk; Sinkhole; stratigraphy (1)
- Asphalt; aging; antioxidant; SBR (1)
- Asphalt; polyurethane; polymer modified asphalt; asphalt polyurethane coating (1)
- BUSINGER-DYEAR; BRUTSAERT'S STABILITY FUNCTIONS; THE SENSIBLE HEAT FLUX (1)
- Bands; STAGGERING; SUPERDEFORMED; & ROTATIONAL BANDS (1)
- Benzimidazole; CHROMENE DYES; POLYESTER FIBRE (1)
- Biocontrol; Eutetranychus orientalis; algal toxicity; microalgae; Chlorella (1)
- Brucella melitensis; 16s rRNA gene; Outer membrane protein (omp2a) gene (1)
- CHEMICAL AIR POLLUTANT; Egypt (1)
- Cation exchange resin; lead (II) ions; Adsorption kinetics; adsorption mechanism; organic acids (1)
- Chitosan; crosslinking; DTPA; Mechanical Properties; application; Resine (1)
- DYEING BEHAVIOR; Benzimidazole; Chromene; POLYESTER FIBRE (1)
- Engineering geological; liquid limit; Badr City; Swelling pressure; rock mass; soils (1)
- Environment; THE PHOSPHATE DEPOSITS; AT EL-RASHDA; Western Desert; Egypt (1)
- HNBUET; Classes of life distributions; test exponentiality; Goodness of fit; Pitman's asymptotic efficiency (1)
- HYDROCHEMICAL RATIOS; surface water; River Nile (1)
- HYDROTHERMAL SYNTHESIS; NANO ZSM-5; Dye decolorization (1)
- Habitats; sabkha; salt marsh; Mangrove; sand plains (1)
- Halophilic; Natrialba aegyptiaca; amylase; production; Optimization; raw starches (1)
- Heavy elements; cosmetics; ICP-OES; Traditional cosmetics in Arabic regions (1)
- Histology of uterus; protein expression; DNA fragmentation; hibernation; Caspase 3; caspase 7 (1)
- Honey; antimicrobial activity; Gamma Irradiation; antibiotics; Pathogenic microorganisms (1)
Articles 1 - 30 of 60
Full-Text Articles in Life Sciences
Synthesis And Evaluation Of Novel Bituminous Materials For Using It In Construction Applications, G. Elkady, M. El-Shafie, Usama Fareed, Elsayed Elnaggar, A. Saleh, Mostafa Shohide
Synthesis And Evaluation Of Novel Bituminous Materials For Using It In Construction Applications, G. Elkady, M. El-Shafie, Usama Fareed, Elsayed Elnaggar, A. Saleh, Mostafa Shohide
Al-Azhar Bulletin of Science
Recently, the application of asphalt in coating purposes presented in different ways. On the other hand polymers are used to improve the properties of asphalt to use in coating purpose. Although asphalt has low cost, high cohesive nature, rheological properties and high thermal resistance but it is not practically used in coating, this because the long curing time of asphalt on the surface of the substrate which Inappropriate industrially, also asphalt need to additives to improve resistance to chemicals. So the aim of this research is to use polyurethane to improve asphalt properties to produce low cast, high qualified asphaltic …
Improving Growth, Yield Quality And Chemical Constituents Of Sesame Plants By Foliar Application Of Ascorbic Acid, Benzyl Adenine And Paclobutrazol, Emad El- Dein Ewais, Abd El-Monem Sharaf, Esam Abd El-Azim, Mohamed Ismail, Mohamed Amin
Improving Growth, Yield Quality And Chemical Constituents Of Sesame Plants By Foliar Application Of Ascorbic Acid, Benzyl Adenine And Paclobutrazol, Emad El- Dein Ewais, Abd El-Monem Sharaf, Esam Abd El-Azim, Mohamed Ismail, Mohamed Amin
Al-Azhar Bulletin of Science
The effect of ascorbic acid (50 and 100 ppm), benzyl adenine (50 and 100 ppm) and paclobutrazol (25 and 50 ppm) foliar application on growth, yield and some physiological parameters of sesame (Sesamum indicum var. Shandawil 3) plants were determined. All treatments caused a great improvement in growth parameters (shoot height, root lengths and number of leaves as well as fresh and dry weights of shoots and roots) of the developed plants. Paclobutrazol was more effective than other treatments in enhancing chlorophyll contents and carotenoid content. The results also showed that nearly all of the treatments tended to increase total …
Toxicity Of Some Microalgae To The Citrus Brown Mite Eutetranychus Orientalis (Klein), M. Abou Shosha, Taher Taha, Mustafa Fawzy
Toxicity Of Some Microalgae To The Citrus Brown Mite Eutetranychus Orientalis (Klein), M. Abou Shosha, Taher Taha, Mustafa Fawzy
Al-Azhar Bulletin of Science
The citrus brown mite Eutetranychus orientalis is a common spider mite, which is a harmful pest in citrus orchards in Egypt. The toxic activities of some microalgae isolated from Egyptian soils and water are studied against E. orientalis. The toxicity of whole cultures (culturing broth and cell) of seven algal strains was tested against E. orientalis. Three strains out of the tested seven strains showed higher toxicity with mortality percentage reached up to 99 % after 72 h recorded against adult individuals of E. orientalis with a strain of Chlorella minutissima. The toxic activity was also tested against immature individuals …
Geological, Soil And Rock Mass Evaluation For Risk Assessment Of Badr City, Egypt, Ahmed Mahmoud Saad
Geological, Soil And Rock Mass Evaluation For Risk Assessment Of Badr City, Egypt, Ahmed Mahmoud Saad
Al-Azhar Bulletin of Science
The study was conducted to assess the index properties and characterize soils and rocks of badr City, as well as their effects on the construction stability. Geological, engineering geological and geotechnical condition of the rocks and soils was studied on the bases of field description and laboratory analysis. It aims also at providing an alternative solution for the expected concerned problems of these shallow facies. From these facies clay layer which has an obvious dangerous effect on the building construction and on any other establishments. The claystone consists of kaolinite, montmorillonite and illite types. The liquid limit ranges from 49 …
Evaluation Of The Antimicrobial Activity Of Certain Irradiated And Non- Irradiated Egyptian Honey Bees' Products, Z. El-Bazza, S. Afifi, S. El- Sayed, D. Aboul Magd
Evaluation Of The Antimicrobial Activity Of Certain Irradiated And Non- Irradiated Egyptian Honey Bees' Products, Z. El-Bazza, S. Afifi, S. El- Sayed, D. Aboul Magd
Al-Azhar Bulletin of Science
With the rise in prevalence of antibiotic-resistant bacteria, honey is increasingly evaluated for its antibacterial activity. In this study, 25 Egyptian honey samples of different types, companies and locations were used. From each sample, numbers of aerobic bacteria were determined using the aerobic plate count technique, and identified using the gram stain technique, biochemical tests and the GEN III MicrostationTM semi-automated ID system. The antimicrobial activity of non-irradiated and irradiated honey samples at different gamma radiation lethal dose levels (0.5, 1, 3, 5, 7, 10 and 15kGy) of different concentrations (100%, 75%, 50% and 25%) were investigated against 6 pathogenic …
Removal Of Malachite Green From Aqueous Solution By Sorption Method On Alkali-Activated Water Hyacinth Stems, Hassan El-Adawy
Removal Of Malachite Green From Aqueous Solution By Sorption Method On Alkali-Activated Water Hyacinth Stems, Hassan El-Adawy
Al-Azhar Bulletin of Science
Water hyacinth (Eichhornia crassipes) was found to have biosorption capacity for cationic dye, malachite green (MG) from aqueous solutions. The study was carried out under various experimental conditions such as dye concentration, adsorption dose, pH and temperature to assess the potentiality of alkali activated water hyacinth stems (AAWHS) for the removal of malachite green dye from waste-effluents. A high percentage of dye removal was observed with the decrease in the initial concentration of dye and increase in amount of adsorbent. Equilibrium isotherms were analysed according to the Langmuir models of adsorption, showing to be applicable with maximum monolayer adsorption capacity …
Numerical Solution Of Satellite Motion Under The Effects Of The Earth’S Gravity Of The Axial Symmetry And Drag Force In Terms Of The Ks-Regularized Variables, Gamal F. Attia
Al-Azhar Bulletin of Science
This paper is concerned with an orbit prediction using one of the best regular theories (KS-regularized variables). Perturbations due to the Earth’s gravitational field with axial symmetry up to the fourth order zonal harmonic and rotating/non-rotating atmosphere (variation in density model with height) are considered. Applications of the problem will be illustrated by numerical and graphical example.
Contribution Of P11 (1440) Resonance To The D(E, E′ Π+)Nn Reaction Including Nn Final State Interaction, Mahmoud Tammam
Contribution Of P11 (1440) Resonance To The D(E, E′ Π+)Nn Reaction Including Nn Final State Interaction, Mahmoud Tammam
Al-Azhar Bulletin of Science
The effect of P11(1440) (Roper) resonance on the response functions for the positivelly charged pion electroproduction from the deuteron is studied using the well known spectator model. The amplitude for the elementary reaction γ* N→π+ N is taken from MAID2003 model. The effect of the NN interaction subsystem in the final state interaction (FSI) is included. Two values for the four momentum transferred Q2 are used. A small effect of the Roper resonance on the structure functions is found.
Water Salinity, Total, Temperary And Permanent Of The Pleistocene Aqifer Samples In El-Sadat Area., M. Wassel, A. Swlem, S. Shama, A. Hamouda, A. Desouky
Water Salinity, Total, Temperary And Permanent Of The Pleistocene Aqifer Samples In El-Sadat Area., M. Wassel, A. Swlem, S. Shama, A. Hamouda, A. Desouky
Al-Azhar Bulletin of Science
From the arithmetic mean values of different ions that predict the most effective ions affecting the salinity level, the obtained data of Pleistocene aquifer show that the effective ions that cause an increase of water salinity are in the orders: Na+ > Ca2+ > Mg 2+ as cations, HCO3-> Cl-> SO42- as anions As a result of cation exchange processes, the increase of Na+ concentration and decrease in Ca2+ and Mg2+ in solution, lead to a considerable decrease in salts causing temporary and permanent hardness in form of CaMg(HCO3)2 and CaMgSO4 salts, respectively. While causing a considerable increase in water salinity but …
Immunolocalization Of Two Putative Pigmentotropins Akh I And -Msh-Like Immunoreactivities In The Brain Of Rough Woodlouse, Porcellio Scaber And Pill Bugs Armadillidium Vulgare (Crustacea, Isopoda)., Maged Fouda
Al-Azhar Bulletin of Science
Antisera against putative pigmentotropic neuropeptides, Adipokinetic hormone I (AKH I) and α-Melanocyte stimulating hormone (α-MSH) reacted with small sets of neurons in the cephalic ganglia of the isopoda Porcellio scaber and Armadillidium vulgare. The distributions of immunoreactivities resembled in the two species. AKH I-like immunoreactivity (AKH I-ir) occurs in both species. In P scaber 5 cells occurred in the optic lobe (OL) (3 small near Lamina ganglionaris, LG and 2 large dorsally) while in A.vulgare only one small cell near LG. The accessory lobe (AL) and subesophageal mass (SM) have the same pattern in both species. There are 2 cells …
Isolation, Identification, And Molecular Characterization Of Brucella Melitensis From Retropharyngeal Lymph Node Of Sheep In Almonofiyah, Egypt, Elsayed Bakhiet, Mohamed Mohamed, Abdel-Khaleck Montasser, Usama Abdul-Raouf
Isolation, Identification, And Molecular Characterization Of Brucella Melitensis From Retropharyngeal Lymph Node Of Sheep In Almonofiyah, Egypt, Elsayed Bakhiet, Mohamed Mohamed, Abdel-Khaleck Montasser, Usama Abdul-Raouf
Al-Azhar Bulletin of Science
Brucellosis is economically important infection in Egypt, and the brucellosis causative agent has not been genetically characterized in detail. In this study Brucella melitensis bv.3 was isolated and characterized from retropharyngeal lymph node and other lymphoid organs of sheep and goats from Almonofiyah Governorate & Albehera Governorate, Egypt, and to characterize one of the Br. melitensis isolates by 16S rRNA gene sequencing and Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR_RFLP) of outer membrane protein (omp2a) gene. Br. melitensis was isolated and identified from 17 out of 47 (36.2%) samples from lymphoid organs of sheep& goats. The 16S rRNA gene of …
Identical Bands And Staggering In Superdeformed Rotational Bands For 193,194,195tl Nuclei, A. M. Khalaf, M.F. Elgabry, N. Gab Allah
Identical Bands And Staggering In Superdeformed Rotational Bands For 193,194,195tl Nuclei, A. M. Khalaf, M.F. Elgabry, N. Gab Allah
Al-Azhar Bulletin of Science
A simple collective rotational model has been constructed to investigate the identical bands in odd-odd nucleus 194Tl and its neighbor odd-A nuclei 193Tl and 195Tl, to describe the ∆I = 1 staggering effect in signature partner pairs of odd-A superdeformed bands 193Tl (SD1, SD2) and 195Tl (SD1, SD2) and to describe also the ∆I = 2 staggering observed in 194Tl (SD3). The model parameters and the bandhead spin ware obtained by adopted best fit method. The systematic variation of the kinematic and dynamic moments of inertia are studied as a function of the rotational frequency, it is found that the …
Simulating The Behavior Of Wind And Swell Waves Generated By Constant Wind Field Over Pacific Ocean, T. A. Sayad, Alaa. M. A. Mahmoud, F. M. El Hussainy, N. A. Darwish
Simulating The Behavior Of Wind And Swell Waves Generated By Constant Wind Field Over Pacific Ocean, T. A. Sayad, Alaa. M. A. Mahmoud, F. M. El Hussainy, N. A. Darwish
Al-Azhar Bulletin of Science
Wam model is used with resolution 0.25O to simulate wind and swell wave's behavior that is generated with constant wind speeds (0.1 m/sec to 20 m/sec). The area of study is over the Pacific Ocean (24°S - 3°N and135°W - 109°W). It is found that the model results show for near calm wind case (0.1 m/sec), no significant impact up to 72 hours on wave height, swell and total wave height. It is also shown in the later case that the wave height is mainly swell wave. In this work a threshold wind speed value (about 7 m/sec) is detected. …
Improving The Accuracy Of Interference Microscope Measurements By Applying Genetic Algorithm, Ezzat Oraby, M. Amer, T.Z.A. Abou-Elnasr, M. M. El Okr
Improving The Accuracy Of Interference Microscope Measurements By Applying Genetic Algorithm, Ezzat Oraby, M. Amer, T.Z.A. Abou-Elnasr, M. M. El Okr
Al-Azhar Bulletin of Science
The interference microscope measurements with white light scanning interferometry (WLSI) and phase stepping interferometry (PSI) have been improved by optimizing the experimental conditions such as vertical distance between the objective and the surface under test (z), the tilt angles of the incident light beam with the surface and incident light intensity (I). Finally an accurate surface parameters measurement is obtainable. A genetic algorithm code has been developed to determine the best values of experimental conditions instead of manual adjustment by the operator. The combined uncertainty has been successfully reduced from 3.01 nm to 0.84 nm for the WLSI roughness measurement. …
Physico-Chemical Characteristics And Natural Radioactivity Of Ismailia Canal Water, River Nile, Egypt., S. Abdel Razeq, S. Soliman, W. Bakr, I. Abdel Ghafar
Physico-Chemical Characteristics And Natural Radioactivity Of Ismailia Canal Water, River Nile, Egypt., S. Abdel Razeq, S. Soliman, W. Bakr, I. Abdel Ghafar
Al-Azhar Bulletin of Science
Ismailia Canal is considered as one of the most important drinking and irrigation water source in Egypt. Twenty four water samples were collected during four successive seasons from summer 2010 to spring 2011 along the area extending from El Mazallat to Anshas . Physical parameters temperature, E.C and TDS and chemical parameters pH ,alkalinity, TH, DO, COD, BOD, NH3 ,NO2- ,NO3- , PO4-3 , Cl-, F-, Br- ,SO4 -2 ,Ca2+,Mg2+, Na+, K+, Fe+3, Cd+2, Zn+2, Cu+2, Pb+2, and Al+3 were analyzed to identify water quality of Ismailia Canal. The results of these analyses, when compared with Egyptian and international standards …
Physicochemical Studies And Application Of Some Natural Extracts And Its Metallic Mordant Complexes As Dyes For Textile Fabrics, Rabie Farag, S. Shakra, Hassan El Adway, Ali. Ali
Physicochemical Studies And Application Of Some Natural Extracts And Its Metallic Mordant Complexes As Dyes For Textile Fabrics, Rabie Farag, S. Shakra, Hassan El Adway, Ali. Ali
Al-Azhar Bulletin of Science
The aim of this present study is to evaluate the performance and efficiency of dyeing of cotton, wool and polyamide from dry skin Allium cepa and henna fabrics with natural dyes obtained as extracts leaves. In recent years, an upsurge of interest in natural dyes has been manifested as replacement of synthetic dyes for food and drugs’ safety and so forth. Natural dyes have limitations of fastness, and brilliancy of shade. Therefore, in present work, use of metallic mordant was investigated to produce depth of shade, bright and fast colors. Natural dyes may chemically be classified as vat, direct, acid …
Hydrothermal Synthesis And Characterization Of Nano Sized Zsm-5 And Their Effect On The Decolorization Of Indigo Carmine Dye, Ibraheem Ali, Ibrahem Ibrahem, Karam Elnasser
Hydrothermal Synthesis And Characterization Of Nano Sized Zsm-5 And Their Effect On The Decolorization Of Indigo Carmine Dye, Ibraheem Ali, Ibrahem Ibrahem, Karam Elnasser
Al-Azhar Bulletin of Science
Silica sources can influence different effects of ZSM-5 crystallization and it leads to change in the properties of the final product. The crystallinity of nanosized ZSM-5 zeolite from precursors mixtures containing different silica sources, e.g. tetraethylorthosilicate (TEOS), colloidal silica (CS), silicic acid(SA) and fumed silica(FS) have been studied. The produced samples are investigated using XRD, SEM, FT-IR, pyridine adsorption and N2 adsorption measurements. XRD results show that the product obtained by different silica sources is nano sized ZSM-5 phase. SEM results show that silica sources influences on shape of the produced ZSM-5; the sample which was prepared by silicic acid …
Response Of Wheat (Triticum Aestivum L.) Plants To Foliar Spraying Of Some Bio-Stimulants (Yeast Extract, Arginine, B12 And Their Interactions), Mohamed Ismail, Mohamed Amin
Response Of Wheat (Triticum Aestivum L.) Plants To Foliar Spraying Of Some Bio-Stimulants (Yeast Extract, Arginine, B12 And Their Interactions), Mohamed Ismail, Mohamed Amin
Al-Azhar Bulletin of Science
A field experiments were carried out in season of 2013/2014 at Botanical garden, Botany and Microbiology Dept., Fac. ofSci., Al- Azhar Univ., Nasr City, Cairo, to study the effect of foliar applications of some bio-stimulants (dry yeast extracts, arginine,B12 and their interactions) on growth, total yield, quality and some chemical constituents of wheat plants. Results showedthat, foliar spraying of wheat plants with bio-stimulants especially yeast extract had a significant effect on vegetative growth,yield and quality. Shoot fresh weight of wheat plants were improved by yeast extract at all doses and B 12 foliar applicationduring the first stage. Results showed that …
Range And Average Of Hydrochemical Ratios Of The Different Surface Water Samples In River Nile And Canals, M. Wassel, G. El-Kady, S. El-Demerdashe, A. Mahmod
Range And Average Of Hydrochemical Ratios Of The Different Surface Water Samples In River Nile And Canals, M. Wassel, G. El-Kady, S. El-Demerdashe, A. Mahmod
Al-Azhar Bulletin of Science
It is found that all River Nile and canals water samples are suitable for all kinds of fruits, vegetables and field crops, where EC values are (< 4) m mhos/cm, while the rest of samples (mixed water samples) are unsuitable for irrigating any type of crops, since their salinities are over (16) mmhos/cm. The study indicated that, all River Nile and canals water samples can be classified as water of the first grade (class I) while mixed water samples can be classified as water of the third grade (class III) of irrigation water.
Removal Of Laser Printer Toner From The Paper Surface Using Some Chemical Methods, S. Shara, A. Aboul El-Magd, Y. Moustafa, A. Bakr, I. Aziz
Removal Of Laser Printer Toner From The Paper Surface Using Some Chemical Methods, S. Shara, A. Aboul El-Magd, Y. Moustafa, A. Bakr, I. Aziz
Al-Azhar Bulletin of Science
In this article, organic solvents are applied to a range of toner- paper combinations to determine their ability to remove toner. Paper sample printed from HP Laserjet 2300dn is soaked in 300 mlof 17 alone solvent and 133 solvent mixtures for 30 minat room temperature.Visual effect of solvent on toner and paper can be classified into 6 groups A, B, C, D, E and F.The effect of varying the solvents proportions in the mixture is explored. Solvents give good dissolving results for paper sample printed from HP Laserjet 2300dn applied on paper samples printed from different brands and same brands …
Synthesis And Characterization Of Two Hydrazones Of Isatine And Their Some Transition Metal Complexes., Badr El-Sayed, Amal Kaaki, Saleh Mekkey
Synthesis And Characterization Of Two Hydrazones Of Isatine And Their Some Transition Metal Complexes., Badr El-Sayed, Amal Kaaki, Saleh Mekkey
Al-Azhar Bulletin of Science
A series of complexes of Co(II), Ni(II), Cu(II), Zn(II), Cd(II) have been synthesized with two hydrazones derived from Isatin with salicylaldehyde (HLa) and 2,4-dinitro phenyl hydrazine (Lb). The complexes have been characterized by the elemental analysis, spectral (FTIR, Mass, Electronic, 1HNMR, ESR), Thermal analysis (TGA&DTA), Magnetic moments and conductance measurements. The proposed structures of the prepared complexes were octahedral (Co(II)-HLa), tetrahedral for Ni(II), Zn(II), Cd(II)-HLa complexes and square planar for (Cu(II)-HLa, Lb Zn(II)-Lb complexes. The synthesized ligands (HLa and Lb) were tested for their antibacterial activities. Only HLa ligand displayed activity against staphylococcus aureas (g +ve)
Photocatalytic Degradation Of Direct Violet 4-Azodye In Aqueous Solution Using Α-Fe2o3thin Films, Abdelmeguid Aboubaraka, Medhat El-Moselhy, Mahmoud Zaher, El-Zeiny Ebeid
Photocatalytic Degradation Of Direct Violet 4-Azodye In Aqueous Solution Using Α-Fe2o3thin Films, Abdelmeguid Aboubaraka, Medhat El-Moselhy, Mahmoud Zaher, El-Zeiny Ebeid
Al-Azhar Bulletin of Science
This study involves the preparation of α-Fe2O3 thin films coated on microscopic glass slides by thermal spray followed by thermally- induced decomposition of Prussian Blue(PB), Fe4[Fe(CN)6]3, in air at 250°C. XRD and SEM were used to characterize the synthesized thin films for surface morphology texturing. Photocatalytic activity of α-Fe2O3 thin films was investigated using direct violet 4-azodye, employing heterogeneous photocatalytic process. Two different types of light have been used in this study, one using UV light and the other using visible light using a 100-watt tungsten lamp. α-Fe2O3 thin film does not give any significant effect upon using UV light …
Potentiometric And Thermodynamic Investigation Of Rhenium(V) Complexes With 1-Methyl-2-Mercaptoimidazole, G. Gouda, M. Shatat, T. Seaf Elnasr, M. Abdallah
Potentiometric And Thermodynamic Investigation Of Rhenium(V) Complexes With 1-Methyl-2-Mercaptoimidazole, G. Gouda, M. Shatat, T. Seaf Elnasr, M. Abdallah
Al-Azhar Bulletin of Science
Stability constants of 1-methyl-2-mercaptoimidazole with rhenium(V) were determined potentiometrically in acidic medium (4 M HCl) at different temperatures. The dissociation constants pK of 1-methyl-2-mercaptoimidazole as well as the stability constants (log K) of their complexes were determined at varieties temperatures. The corresponding thermodynamic parameters (∆Go, ∆Ho and ∆So) were determined and discussed. The formation of the metal complexes has been found to be exothermic.
Ecological Characteristics Of Extreme Habitats In Eastern Province Of Saudi Arabia, Eglal Galaledin, Amna H.El-Raey
Ecological Characteristics Of Extreme Habitats In Eastern Province Of Saudi Arabia, Eglal Galaledin, Amna H.El-Raey
Al-Azhar Bulletin of Science
Extreme habitats, in three sites (1-3), located in the Eastern Province of Saudi Arabia, were investigated. Two sites (1&2)are located at the Arabian Gulf shoreline; representing the habitats of littoral sabkha /salt marsh, and those of mangrove swamps; respectively. The third site (3) is located, landwards, towards the Dahna sand, representing the habitats of sand plains. The three sites are characterized by along dry season extending from April to December (as indicated the climate diagram); while the calculated index of aridity classify the climate, of the studied sites, as ''arid''. The halophytic species: Halocnemum strobilaceum, Arthrocnemum macrostachyum and Salsola drummondii …
Evaluation Of The Toxic Effects Of Difenoconazole Fungicide (Score) On Male Albino Rats, Mohamed Shahat
Evaluation Of The Toxic Effects Of Difenoconazole Fungicide (Score) On Male Albino Rats, Mohamed Shahat
Al-Azhar Bulletin of Science
This study was designed to estimate the LD50 of Score (difenoconazole) fungicide and evaluate its toxic effects on body weight, liver weight, some biochemical parameters and hematological profiles of male albino rats after chronic oral daily doses (1/20, 1/10 and 1/5 LD.50) for 8 weeks. Rats were divided into 4 groups, the first group (G1) as control group, the other groups (G2, G3 and G4) treated daily with 20,40 and 80 mg/100 g.b.w. for 1, 4 and 8 weeks respectively The medium lethal dose (LD.50) of Score was 400 mg /100g. body weight of adult male rat. Significant decreases in …
Isolation And Description Of Antimicrobial And Anti-Tumor Produced By Actinomyces Sp., Maged Ahmed, Rasha Ahmed, Ahmed Merdash, Hussein El-Kabbany
Isolation And Description Of Antimicrobial And Anti-Tumor Produced By Actinomyces Sp., Maged Ahmed, Rasha Ahmed, Ahmed Merdash, Hussein El-Kabbany
Al-Azhar Bulletin of Science
Actinomyces are one of the major group of the actinomycetes , they are important in soil biodegradation by the recycling of nutrients associated with polymers such as keratin, lignocelluloses and chitin , produce several volatile substances and exhibit diverse physiological and metabolic properties , such as the production of extracellular enzymes. Many of these secondary metabolites are potent antibiotics, which has made Streptomycetes the primary antibiotic organisms exploited by the pharmaceutical industry. Members of this group are producers, in addition of clinically useful antitumor drugs such as vancomycins, peptides , aureolic acids , enedynes and antimetabolites and they exert antitumor …
Production Of An Extracellular Halophilic Amylase From The Extremely Halophilic Archaeon Natrialba Aegyptiaca Strain 40t, Noura Hagaggi, Francis Hezayen, Usama Abdulraouf
Production Of An Extracellular Halophilic Amylase From The Extremely Halophilic Archaeon Natrialba Aegyptiaca Strain 40t, Noura Hagaggi, Francis Hezayen, Usama Abdulraouf
Al-Azhar Bulletin of Science
The extremely halophilic archaeon, Natrialba aegyptiaca strain 40T, which was isolated from a salty soil close to Aswan, Egypt is able to produce a halophilic extracellular, raw starch-digesting amylase. Optimization of medium components and culture conditions to enhance amylase production was investigated. Maximum production of this amylase was achieved in a medium contained (%, w/v): NaCl, 15; KCl, 1.5; MgSO4.7H2O, 0.1 and soluble starch, 0.05 at a pH range between 6-8 and a temperature range between 45-47 oC after incubation period of 144 hr. under static conditions and 48 hr. with shaking at 150 rpm. The enzyme could efficiently hydrolyze …
The Production Of Antimicrobial Agents By Wild & Radio Activated Actinobacter Sp., Maged Ahmed, Medhat Abd El-Mohsein, Mostafa Salama, Hussein El-Kabbany
The Production Of Antimicrobial Agents By Wild & Radio Activated Actinobacter Sp., Maged Ahmed, Medhat Abd El-Mohsein, Mostafa Salama, Hussein El-Kabbany
Al-Azhar Bulletin of Science
The production of several volatile substances like Geosmin responsible of the characteristic wet earth odor distributed in terrestrial and aquatic ecosystems, especially in soil. Members of this group are produce clinically useful antitumor drugs such as Anthracyclines, Antimetabolites, Arzinophilin, Mitomycins and Vancomycins . DNA cleavage by topoisomerase I or II inhibition , Mitochondria permeabilization inhibition and inhibiting tumor-induced angiogenesis . Isolation , Purification of Actinobacter from different sources and Determination of biological activities ( Antimicrobial / Anti-tumor ) . Optimization of production media ( natural and synthetic) of the promising bioactive compounds ( Antimicrobial / Anti-tumor ). Finally, Determination of …
Biochemical And Geographical Studies On Potato Tuber Moth, Phthorimaea Operculella (Zeller) In Some Governorates Of Arab Republic Of Egypt, Mohamed El-Shehaby
Biochemical And Geographical Studies On Potato Tuber Moth, Phthorimaea Operculella (Zeller) In Some Governorates Of Arab Republic Of Egypt, Mohamed El-Shehaby
Al-Azhar Bulletin of Science
Simple proteins, lipids and carbohydrates were examined by acrylamide –gel electrophoresis in the whole body( larva or prepupa ,pupa and adult) of the potato tuber moth Phthorimaea operculella in three governorates in the Delta of Egypt . Polymorphic in the whole body of potato tuber moth, variations in simple proteins ,lipoproteins ,lipoglycoproteins according to their mobility on polyacrylamide gel electrophoresis and staining with Coomassie brilliant blue ® ,Sudan black B and Periodic acid Schiff’s were detected. Twenty bands were further characterized simple proteins, lipoproteins, glycoproteins, lipoglycoproteins. The different protein concentrations was stage and locations dependent it reached a peak just …
Associations Between Some Macroalgal Species And Limpets At Certain Rocky Intertidal Zones Of Al-Jabel Al-Akhdar Coast, Libya., Magda El-Adl, Ahmed Bream
Associations Between Some Macroalgal Species And Limpets At Certain Rocky Intertidal Zones Of Al-Jabel Al-Akhdar Coast, Libya., Magda El-Adl, Ahmed Bream
Al-Azhar Bulletin of Science
This study was set out to document the marine algal species associated with limpets living on the rocky shores of the north-eastern coast of Libya for the first time. Samples were collected from seven sites extend from Ras Hailal to Al-Hanyaa rocky shores during winter and spring 2012. Algal species associated with limpets in Al-Hanyaa polluted site were represented by two species belong to Chlorophyta and only one species for each Phaeophyta and Rhodophyta. On the other hand, a single species of Rhodophyta was recorded on Patella turbinata inhibiting the clean site of Susa. The present results showed that, the …