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Full-Text Articles in Life Sciences
Isolation And Characterization Of Novel Extremely Halothermophilic Bacterium, Halomonas Caseinilytica Wn.1b.S, From Wadi An Natrun, Egypt, S. El-Louboudy, M. El-Gamal, H. Mahdy, M. Mohamed
Isolation And Characterization Of Novel Extremely Halothermophilic Bacterium, Halomonas Caseinilytica Wn.1b.S, From Wadi An Natrun, Egypt, S. El-Louboudy, M. El-Gamal, H. Mahdy, M. Mohamed
Al-Azhar Bulletin of Science
The purpose of the present study was to isolate microbial halothermophiles from hyper saline Al- Hamra Lakeat Wadi An Natrun, Egypt. Twenty eight bacterial isolates were obtained and the morphological and physiological properties in addition to enzyme activities were studied. Amongst those isolates, WN.1B.s was selected as the most potent isolate based on growth at high temperature (up to 65oC) and at high salt concentration (up to 34%, near saturation state).A phylogenetic analysis based on 16S rRNA gene sequences indicated that the isolate WN.1B.s had the highest sequence similarity with respect to type strains of Halomonas caseinilytica (97 %), Halomonas …
Influence Of Topographic Aspect On The Distribution Of Nepeta Septemcrenata In Saint Katherine Protectorate, South Sinai, Egypt., M. Mansour, K. Omar
Influence Of Topographic Aspect On The Distribution Of Nepeta Septemcrenata In Saint Katherine Protectorate, South Sinai, Egypt., M. Mansour, K. Omar
Al-Azhar Bulletin of Science
A study was carried out on a wild herb Nepeta septemcrenata Benth. (Family: Lamiaceae) in Saint Katherine Protectorate, South Sinai, Egypt to assess the effect of topographic aspect on plant distribution, morphological parameters and soil component. The results show that aspect influence on physical and chemical properties of soil. Water content showed great variation among different aspect directions. Plant traits also affected by these directions. Results found that 26.8% of N.septemcrenata populations’ recorded at North aspect and no observation for Nepeta at South aspect. Soil physical properties showed significant variation among different aspect ranks. Results also showed positive correlation between …
Effect Of Lipopolysaccharide And The Ameliorative Effect Of The Antioxidant Melatonin On Some Physiological Parameters Of Sheep Embryos, Diaa Ahmed, Samir Zaahkouk, El-Yamani El-Zwahry
Effect Of Lipopolysaccharide And The Ameliorative Effect Of The Antioxidant Melatonin On Some Physiological Parameters Of Sheep Embryos, Diaa Ahmed, Samir Zaahkouk, El-Yamani El-Zwahry
Al-Azhar Bulletin of Science
As known, lipopolysaccharide (LPS) is a toxin that is secreted from gram negative bacteria as E. coli which is present in the gut of animals like sheep and it may be transported to the embryo through the blood affect the brain and other organs. Little is known about the effect of LPS on liver and kidney function or hematological parameters. In the present study we found that melatonin treatment improved most of the liver functions that affected by LPS injection and also improve kidney function, although LPS injection was found to lead to a decrease of createnine, urea and uric …
Survey Of Some Plant Extracts Against Certain Human Fungal Pathogens, Al-Sayed Ragab, H. El- Shiekh, Eman El-Taher, Basma Amin
Survey Of Some Plant Extracts Against Certain Human Fungal Pathogens, Al-Sayed Ragab, H. El- Shiekh, Eman El-Taher, Basma Amin
Al-Azhar Bulletin of Science
Antifungal agents (A.f.A.) play an important role in the treatment of human serious diseases. Therefore, A.f.A. from natural sources was preferred than that synthetic compounds. Methanol, methanol: water; (1:1), water, chloroform and benzene extracts of thirty two plant organs; sixteen desert and sixteen cultivated plant organs were assessed against forty six human fungal pathogenic isolates; twelve (yeast), two (yeast like fungi) and thirty two (filamentous fungi).From the five assessed extracts, chloroform extracts exhibit the most significant activity followed by benzene, methanol: water; (1:1) and methanol, while, water extracts exhibited the least activity. Chloroform extracts revealed the highest inhibitory effect against …
Distribution And Abundance Of Zooplankton In The River Nile,Egypt, Nehad Sayed, Khadiga Gaber, Faten Elfeky
Distribution And Abundance Of Zooplankton In The River Nile,Egypt, Nehad Sayed, Khadiga Gaber, Faten Elfeky
Al-Azhar Bulletin of Science
Zooplankton is known to form an important component of the biological communities in large rivers due to their high abundance and ability to cycle nutrients through the aquatic environment. Little is known about these communities in the River Nile, so the present study was designed on samplingZooplankton in the River Nile (main body) and its two branches, Rosetta and Damietta, along four seasons of the year 2009. During the investigation period, Rotifera represented the most dominant species recording 54% followed by Protozoa, Cladocera, Copepoda, and Meroplankton with ratios of 17%, 15%, 9%, and 6% respectively. There were marked seasonal differences …
Effect Of Altitudinal Variations On The Distribution Of Nepeta Septemcrenata In Saint Katherine Protectorate, South Sinai, Egypt., M. Mansour, K. Omar
Effect Of Altitudinal Variations On The Distribution Of Nepeta Septemcrenata In Saint Katherine Protectorate, South Sinai, Egypt., M. Mansour, K. Omar
Al-Azhar Bulletin of Science
A study was carried out on a wild herb Nepeta septemcrenata Benth. (Family : Lamiaceae) in Saint Katherine Protectorate, South Sinai, Egypt to assess the effect of altitude (1400 to 2200 m above mean sea level) on plant distribution, morphological parameters, soil component and grazing pressure. The results show that elevation influence on physical and chemical properties of soil. Water content show great variation among different elevation ranks. Plant traits also affected by elevation gradient. Results found that N.septemcrenata cover, Importance value, Number of individuals and internodes length increased positively with elevation while species richness decreases. Plant width, height and …
Variation Of Protein Profile Among Consecutive Stings Of The Scorpion Parabuthus Leiosoma (Family: Buthidae) From Egypt, Supports The Venom-Metering Hypothesis In Scorpions., Moustafa Sarhan, Maged Fouda, Alaa Elbitar, Hamdy Aly, Ahmed Sayed
Variation Of Protein Profile Among Consecutive Stings Of The Scorpion Parabuthus Leiosoma (Family: Buthidae) From Egypt, Supports The Venom-Metering Hypothesis In Scorpions., Moustafa Sarhan, Maged Fouda, Alaa Elbitar, Hamdy Aly, Ahmed Sayed
Al-Azhar Bulletin of Science
Scorpions use their venom to immobilize prey items and defend themselves against predators. Scorpion venom is a complex mixture composed of a wide array of substances such as salts, small molecules, peptides, and proteins. During analysis of the prey capture behavior of the scorpion Parabuthus leiosoma, we noticed that the scorpion stings the prey several successive stings in different specific regions. The stings started with ventral surface of the abdomen followed by thorax, shoulders and finally the head. This finding raised the possibility that the scorpion might use the venom with different composition in different contexts. To check this possibility, …