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| [9001670.] كود البحث : | 9001670 - 2017/02/23 |
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Determination of some heavy metals in water and Oreochromis niloticus in Lake Manzala / |
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Mansoura Journal of Environmental Sciences - Egypt JOESE / Vol.46 No.1 - March 2017 |
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تاريخ تقديم البحث 23/02/2017 |
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تاريخ قبول البحث 21/11/2017 |
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عدد صفحات البحث 30 |
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Mostafa A. Mousa |
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Mostafa A. Hussien |
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Dina Ahmed Khedr - مؤلف رئيسي |
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Keywords: Pollution, Lake Manzala, Heavy metals, Oreochromis niloticus |
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Abstract
The concentrations of Zn(II), Cd(II) and Pb(II) were measured in water and Oreochromis niloticus in Lake Manzala, Eygpt during four seasons (from January to October 2014). The mean concentrations heavy metals (Zn(II), Cd(II) and Pb(II)) were 2.12, 0.07 and 0.53 ppm, respectively in lake water. The study results showed El-Genka site generally the highest heavy metals concentrations in water, while Lagan site appeared to be the lowest polluted region of the lake. Also, the highest metal levels in the water were found during summer, while the lowest levels occurred during winter and autumn. In fish muscles, the mean concentrations of heavy metals as (Zn(II), Cd(II) and Pb(II)) were 4.65, 0.09 and 0.47 ppm, respectively. The mean of Zn(II), Cd(II) and Pb(II) in the gills of fish were 16.47, 0.3 and 1.91 ppm, respectively. The mean concentrations of same heavy metals in the liver were 20.87, 0.14 and 0.58 ppm, respectively. The results of this study indicated that generally O. niloticus samples from El-Genka and El-Serw sites the highest metal concentrations in their tissues, while Lagan site was the lowest polluted region in fish tissue. Also, metal accumulation in O. niloticus samples during summer, spring and autumn (hot and warm) seasons were showed higher than winter season. In addition, the order of metals accumulation in fish organs in this study were as the following gills> liver> muscle. Finally, the muscle tissue of O. niloticus collected from the studied area in Lake Manzala may pose health risk to consumer, as concentration of Pb(II) and Cd(II) exceeded some those of permissible limits as (EC and EU). |
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| [9001671.] كود البحث : | 9001671 - 2017/03/02 |
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Effect of seasonal changes of natural vegetation on the movement of aeolian deposits at Abu Ghelela area, Mersa Matrouh, Egypt / |
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| تخصص البحث : |
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Mansoura Journal of Environmental Sciences - Egypt JOESE / Vol.46 No.1 - March 2017 |
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تاريخ تقديم البحث 02/03/2017 |
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تاريخ قبول البحث 22/11/2017 |
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عدد صفحات البحث 21 |
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El-Bana, M. Saber |
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Mahmoud E. Mahmoud |
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Hossam M. El Gamal |
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Dr. Anwar Elkharbotly - مؤلف رئيسي |
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Keywords: Sand Dunes, Nebkha, Natural vegetation, Soil properties, Soil nutrients, dune parts |
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Abstract
The northern plateau of the western desert of Egypt is severely affected by desertification processes and suffer from sand drift, erosion and deposition where is dry conditions are dominant with scares soil vegetation cover and limited water resources. Four locations around Abu Ghlaila area were selected as the experimental sites, three locations of them were selected in sand plains habitat and the last one was selected in an active shifting sand dunes. The purpose of this study was to investigate seasonal variation of plant species and plant cover during fall and spring in sand sheets habitat in addition monitoring plant species familiar to sand dune habitat with focusing in distribution of plant species in different dune position, dune activity, sand drift potential, sand movement, nebkha characteristics, soil properties, soil organic matter and soil nutrients inside (IN) and between nebkha (BN) and over different dune positions (windward slope (WWS), dune crest (DC), leeward slopes (LWS) and interdunes (ID). A total of 62 plant species were recorded in the sand plains habitat with dominant plants of Haloxylon scorpium (IV= 12.9), whereas the less common species is Anabasis articulata (IV= 3.45). Most of annuals ar completely disappeared in the fall season. However, in the active shifting sand dune habitat, fine sand grains are charaterize sand particles in different dune positions and a total of 10 plant species belonging to 10 families were recorded. Leeward slopes recorded the highest soil cover, where five plant species were distributed with total cover of 25.58 % (Thymela hirsuta (12.00 %), Heliotropium digynum (7.35 %), Cornulaca monocanths (2.55 %), Cynodon dactylon (2.42 %) and Salsola tetrandra (1.26 %),. The lowest nebkha hieght was 25 cm and recorded for Heliotropium digynum which formed rounded nebkha shape, whereas plants of Carduus pycnocphalus and Thymalae hirsutu were the highest plant species. Leeward slopes and inside nabkhas showed more favorable conditions for soil properties i.e. organic matter and soil nutrient contents. Barani area is characterized by an intermediate-energy wind environment and highly active dune. Aeolian deposits of the region are moved from north-northwest direction towards south – southeast and the annual rate of sand movement range between 3.6 to 4.0 m/year. |
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| [9001672.] كود البحث : | 9001672 - 2017/03/09 |
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Molecular polymorphism and Pleomorphic pattern of new strains of Hortaea werneckii isolated from salt marshes of Egypt / |
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| تخصص البحث : |
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Mansoura Journal of Environmental Sciences - Egypt JOESE / Vol.46 No.1 - March 2017 |
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تاريخ تقديم البحث 09/03/2017 |
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تاريخ قبول البحث 22/11/2017 |
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عدد صفحات البحث 19 |
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Hoda M. Soliman |
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Ashraf Elsayed |
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Ahmed Gebreil |
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Nada I. Magdy |
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Amr M. Mowafy - مؤلف رئيسي |
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Keywords: DNA fingerprinting, Hortaea, pleomorphism and protein profile. |
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Abstract
This study describes the growth pleomorphic pattern and the molecular polymorphism of Hortaea werneckii strains EGYNDA08, EGYNDA16 and EGYNDA90 recently isolated from Egypt. The results showed that both EGYNDA08 and EGYNDA90 strains exhibited fragmented hyphal production. However, the pleomorphic pattern of EGYNDA16 strain revealed the dominance of yeast phase. This varied pattern reflects the original habitat for each strain. The colour development for all strains indicated the production of melanin and the ability of the strains EGYNDA08 and EGYNDA90 to produce more melanin than EGYNDA16 has been indicated indirectly. The pleomorphic differences between EGYNDA08 and EGYNDA90 in one side and EGYNDA16 in the other side supported by the DNA fingerprinting and protein profile concluded that both EGYNDA08 and EGYNDA90 strains are evolutionary relevant as they showed almost the same pleomorphic and molecular polymorphism, however, the different characteristics of EGYNDA16 concluded that this strain has been descended independently from another ancestor. This data supports that EGYNDA16 is a novel species of Hortaea. |
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| [9001757.] كود البحث : | 9001757 - 2017/11/25 |
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Synthesis, thermal, molecular structure, molecular docking and biological study of 1-(2-thiazolylazo)-2-naphthalenol with Zn (II), Cd (II) and Pb (II). / |
| تخصص البحث : Medicine |
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Mansoura Journal of Environmental Sciences - Egypt JOESE / Vol.46 No.1 - March 2017 |
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تاريخ تقديم البحث 25/11/2017 |
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تاريخ قبول البحث 25/11/2017 |
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عدد صفحات البحث 24 |
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Dina Ahmed Khedr - مؤلف رئيسي |
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Alaa S. Amin |
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Mostafa A. Hussien |
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Keywords: 1-(2-thiazolylazo)-2-naphthalenol (TAN), IR, 1H NMR, Molecular docking, Biological activity. |
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Abstract
Thiazolylazo dye derivatives and their metal complexes have been synthesized the reaction of Zn (II), Cd(II) and Pb(II) ions with 1-(2-thiazolylazo)- 2-naphthalenol (TAN) in 1:2 (metal-to-ligand) molar ratio. The ligand and their metal complexes were characterization by elemental analysis, (IR and 1H NMR spectra), furthermore thermal analysis (TG and DTG) systems. The kinetic and thermodynamic parameters, for example, E?, ?H?, ?S? and ?G? are ascertained from the DTG curves. The complexes are suggested to have the general formula [M(L)2].nH2O; M= Zn(II), (n= 2)and M=Cd(II), (n=4), [Pb2(L)(NO3)4.H2O].H2O. Molecular docking was utilized to predict binding between azo compounds with the receptor of prostate cancer 2q7k-Hormone. The biological activity of the ligands and their metal complexes was assessed against a few sorts of Bacillus subtilis, Streptococcus pyogenes, Staphylococcus aureus (Gram positive), Escherichia coli, Pseudomonas aeruginosa, Erwinia carotovora (Gram negative) and antifungal activity against candida. |
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| [9001758.] كود البحث : | 9001758 - 2017/11/25 |
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Assessment of Water Quality of the Northern Delta Lakes, Egypt / |
| تخصص البحث : Basic Sciences |
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Mansoura Journal of Environmental Sciences - Egypt JOESE / Vol.46 No.1 - March 2017 |
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تاريخ تقديم البحث 25/11/2017 |
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تاريخ قبول البحث 25/11/2017 |
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عدد صفحات البحث 27 |
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Hazem Taha Abd El Hamid - مؤلف رئيسي |
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Talaat A. Hegazy |
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Mahmoud S. Ibrahim |
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Khalid M. El-Moselhy |
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Keywords: Water quality, Northern Delta Lakes, Egypt, WQI, TSI. |
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Abstract
The northern delta lakes are exposed to huge amounts of drainage water containing organic and inorganic pollutants. Due to excessive nutrients, especially nitrogen and phosphorus, these water bodies are able to support an abundance of undesirable aquatic plants causing eutrophication and deterioration of their water quality. So we aimed to study the water quality and trophic state based on two principal indexes namely water quality index (WQI) and trophic state index (TSI). Ten representative surface water samples were collected from each lake for determination of physicochemical parameters (i.e. pH, salinity, DO, nutrients “reactive phosphorus, reactive silicate, nitrate, nitrite, chlorophyll a and ammonia”, Total alkalinity and total hardness). Variations in nutrient concentrations are directly related to agricultural and industrial wastes which can be thrown directly or indirectly in the lakes. from the calculations of WQI, the lakes were categorized into bad and poor water quality. While the trophic state is ranked to eutrophic and hyper-eutrophic conditions. These may due to excessive drainage water from different sources either from agricultural, industrial or sewage water. It is highly recommended that drainage water should be treated, removing of unwanted plants and providing decision makers with data. |
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| [9001759.] كود البحث : | 9001759 - 2017/11/25 |
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Floristic Features and Vegetation Structure of Salt Affected Lands at the North Nile Delta, Egypt / |
| تخصص البحث : Basic Sciences |
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Mansoura Journal of Environmental Sciences - Egypt JOESE / Vol.46 No.1 - March 2017 |
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تاريخ تقديم البحث 25/11/2017 |
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تاريخ قبول البحث 25/11/2017 |
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عدد صفحات البحث 31 |
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Yasser A. El-Ameir - مؤلف رئيسي |
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Ramadan A. Shawky |
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Keywords: Vegetation, Salt affected lands, North Nile Delta. |
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To carry out the present investigation, some pilot areas were selected at the north of the Nile Delta of Egypt extending from Damietta westward to Rosetta covering the north borders of five Governorates namely: Port Said, El-Dakahlia, Damietta, Kafr El-Sheikh and El-Behira. The vegetation of the study areas was represented by 79 species (38 annuals, one biennials and 40 perennials) belonging to 63 genera and related to 24 families. Poaceae, Astraceae and Chenopodiaceae are considered the major families as they contribute collectively about 51.91% of the total recorded species. Therophytes and cryptophytes are the most abundant life forms. The chorological analysis of the study area revealed that the Mediterranean taxa are represented by relatively highest percentage of plant species (66.3%). On the other hand, the Cosmopolitan (12.66%), Pantropical (2.53%), Neotropical (2.83%), Saharo-Sindian (3.80%). The vegetation structure is classified by TWINSPAN into four groups; I) dominated by Arthrochemum macrostachyum, II) dominated by Halocnemum strobilaceum, III) co-dominated by Halocnemum strobilaceum and Juncus acutusand group IV) co-dominated by Inula crithmoides and Juncus rigidus. The most important edaphic factors correlated with the vegetation of the salt affected sites are: magnesium, electric conductivity, sulphates, chlorides, calcium carbonate, porosity, water-holding capacity and pH |
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