aaelkhatib

Ahmed Ali Ahmed El-Khatib اد/ احمد الخطيب

Professor -

Faculty of science

Address: سوهاج ، مصر

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الجامعات في الوطن العربي الوضع الراهن و متطلبات الالفية الثالثة
يهتم الكتاب بالقاء الضوء على اوضع الراهنللجامعات العربية و ايضا اليات التطوير المقترحة لتلبيةمتطلبات الالفيةالثالثة Read more

Bioaccumulation potential and physiological responses of aquatic macrophytes under Pb water pollution
bioaccumulation of Pb by hyrophytes and the physiological response due to was studied Read more

Morpho-Anatomical Characteristics of Olive (Olea europaea L.) Trees Leaf as Bio-indicator of Cement Dust Air Pollution in Libya
Comparisons were made between the anatomical and morphological changes in olive tree leaves from a site with relatively clean air (Al-Khadra area), and two sites (al-Khums and Zelatin) near to cement factories in the area east to Tripoli, Libya. Olive tree leaves exhibited marked variations in their morphological and anatomical characteristics, in relations to variations in the site cement dust ... Read more

BIOMAGENTIC MONITORING OF AIR POLLUTION USING DUST PARTICLES OF URBAN TREE LEAVES AT UPPER EGYPT
Six common tree species were used to check their suitability to use as magnetic biomonitors for particulate air pollution. The morphology and chemical composition of their leaf dust were identified using SEM/EDX. The results showed that the shape of particles are sphers, ovoid, irregular or grouped into aggregates; they were well within the size range of urban dust, especially hazardous ... Read more

Heavy metal biomonitoring and phytoremediation potentialities of aquatic macrophytes in River Nile
The concentrations of Cd, Cu, Pb, and Zn in sediments, water, and different plant organs of six aquatic vascular plant species, _Ceratophyllum demersum_ L. _Echinochloa pyramidalis_ (Lam.) Hitchc. & Chase; _Eichhornia crassipes_ (Mart.) Solms-Laub; _Myriophyllum spicatum_ L.; _Phragmites australis_ (Cav.) Trin. ex Steud; and _Typha domingensis_ (Pers.) Poir. ex Steud, growing naturally in the Nile system (Sohag Governorate), were investigated. ... Read more

Induction of Biomarkers Associated with Cadmium Detoxification in Aquatic Species
The aquatic species _Ceratophyllum demersum_ and _Myriophyllum spicatum_ were grown in different Cd concentrations (0, 25, 50, 75 mg/l) in a hydroponic system to analyze their detoxification capacity and the suitability of pigments and proline content to serve as biomarkers. Both studied species exhibited the same increasing pattern of Cd removal, when they treated with different Cd concentrations._ M. spicatum ... Read more

Bio-monitoring of Airborne Dust Particles Pollutants by Morpho-anatomical Reactions of Urban Tree Leaves Under Dry Climate
THIS IS A MORO- ANATOMICAL study where Ficus nitida tree leaves from dust-affected street are compared with those of control from a pollution free site. Under the impact of dust particles, leaf sizes and specific leaf area are significantly smaller and stomatal density differs. Under pollution circumstances, visual symptoms including chlorosis /yellowish and dark spots on the adaxial surface of ... Read more

PHYSIOLOGICAL RESPONSE OF EUCALYPTUS ROSTRATA TO HEAVY METAL AIR POLLUTION
The physiological response of Eucalyptus rostrata due to exposure to heavy metal air pollutants was investigated. The heavy metals Cu, Cd, Fe, and Pb were applied to the above ground parts of the plants, under greenhouse conditions. The metal contents were proportional to the metal concentration in the sprayed solutions. Increasing sprayed metal concentrations was found to have an important ... Read more

Capture of particulate pollution by trees: a comparison of species typical of semi-arid area (Ficus nitida and Eucalyptus globules) with European and North American species
Particulate pollution is a serious concern in developed countries especially in urban and suburban areas where it has adverse effects on human health, exacerbating a wide range of respiratory and vascular illnesses. Data are now available which indicate that similar problems probably occur in countries in transition and may indeed be worse where national air quality standards have been neither ... Read more

Does allelopathy have a role in the ecology of  Chenopodium murale
In view of their potential bioaccumulation of heavy metals, Ceratophyllum demersum and Myriophyllum spicatum was studied under hydroponic cultures enriched by different Pb concentrations (25, 50, 75 mg/l) for 1–7 days. Both species exerted remarkable capabilities to concentrate Pb in their tissues as compared to control. The highest accumulation value of Pb (164.26 mg/g.dw) was recorded in C. demersum and ... Read more