Publications

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2018
Ahmed, R. H., M. H. Badawi, A. S. Ali, and M. Fayez, "Growth performance of rhizobacteria on water hyacinth (Eichhornia crassipes) juices and dehydrated powder", The Egyptian Journal of Aquatic Research, vol. 44, no. 1, pp. 1 - 7, 2018. AbstractWebsite

In the present study, juice of water hyacinth (Eichhorina crassipes), either crude or from its successive dilutions (1:1, 1:10, 1:30, 1:50 v/v) supported the in vitro development of Bacillus megaterium, Bacillus subtilis, Azotobacter chroococcum and Rhizobium leguminosarum biovar Phaseoli with doubling time (23.1–63.0 min) which was comparable if not shorter, to that calculated using the standard laboratory -synthetic media (nutrient, N-deficient mannitol and yeast extract agar media; 48.0–64.8 min). Rhizospheric microorganisms of legume and non-legume plants successfully grew on surface-inoculated agar plates of crude and diluted juices of the macrophyte. Tea bags filled with the dehydrated powders (5 and 10 g l−1) of water hyacinth supported the in situ recoverability of total rhizobacteria in population densities (3 × 107 - >108 cfu.g−1), which were found to be comparable, if not excessive, to those enumerated on the recommended culture media. Morpho-physiological identification of some isolates that had developed on the plant juice and tea bag culture media, revealed that they are not akin to those cultured on the chemically-synthetic culture media; they possibly represent a portion of recommended media - unculturables.

2012
Ahmed, R. H., "Microalgae as a future key challenge to climate protection. (Poster and oral presentation)", 3rd International Conference for Prospective Leaders in Climate Protection and Resource Conservation on "Global Climate Change – Approaches to International Collaboration", Bonn, Germany, 2012.
2009
Ahmed, R. H., O. S. Barakat, and H. M. A., "Possible Toxicity of Drinking Water by Cyanotoxins in River Nile, Great Cairo", 1st International Joint Conference on Materials Science, Nanotechnology and Biotechnology- MNB 09- Future Challenges, National Research Centre (NRC). Giza, Egypt, 4-6 January 2009.
2008
Barakat, O. S., R. H. Ahmed, and H. M. A., "Biological and Chemical Evaluation of Some Drinking Water Sites on River Nile, Egypt", Bulletin of the Faculty of Agriculture of Cairo University, vol. 59, pp. 132-141, 2008.