Institution
Cairo University
Education•Giza, Egypt•
About: Cairo University is a education organization based out in Giza, Egypt. It is known for research contribution in the topics: Population & Medicine. The organization has 33532 authors who have published 55581 publications receiving 792654 citations. The organization is also known as: Fuad I University & King Fuad I University.
Topics: Population, Medicine, Cancer, Breast cancer, Diabetes mellitus
Papers published on a yearly basis
Papers
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TL;DR: This paper attempts to provide a comprehensive classification and categorization for the various techniques and algorithms used in M-WSNs for enhancing coverage after initial deployment, and for maintaining coverage after node failure.
128 citations
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TL;DR: In this paper, mixed magnetite-hematite nanoparticles were synthesized via different routes such as, coprecipitation in air and N 2 atmosphere, citrate-nitrate, glycine-nitrates and microwave assisted citrate methods.
Abstract: Mixed magnetite–hematite nanoparticles were synthesized via different routes such as, coprecipitation in air and N 2 atmosphere, citrate–nitrate, glycine–nitrate and microwave-assisted citrate methods. The prepared samples were characterized by X-ray diffraction (XRD), high resolution transmission electron microscope (HRTEM), BET measurements and magnetic hysteresis. XRD data showed the formation of magnetite–hematite mixture with different compositions according to the synthesis method. The particle size was in the range of 4–52 nm for all the prepared samples. From HRTEM micrographs, it was found that, the synthesis method affects the moropholgy of the prepared samples in terms of crystallinity and porosity. The magnetite–hematite mixture was employed as a sorbent material for removal of some heavy metal ions from water such as lead(II), cadmium(II) and chromium(III). The effects of pH value and the contact time on the adsorption process were studied and optimized in order to obtain the highest possible adsorption efficiency of the magnetite–hematite mixture. The effect of the synthesis method of the magnetite–hematite mixture on the adsorption process was also investigated. It was found that samples prepared by the coprecipitation method had better adsorption efficiency than those prepared by other combustion methods.
128 citations
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TL;DR: In this article, the behavior of calcareous sand located in the North Coast of Egypt, Dabaa area, under static and cyclic loading was studied through a series of monotonic cyclic undrained triaxial tests conducted on two relative densities and different effective confining pressures.
128 citations
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TL;DR: In this study highly efficient photocatalyst based on composite nanofibers containing polyacrylonitrile (PAN), carbon nanotubes (CNT), and surface functionalized TiO2 nanoparticles was developed and it was demonstrated that the photodegradation efficiency can remain constant at the level of 99% after five consecutive cycles.
128 citations
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TL;DR: Lactobacillus sp.
Abstract: Streptococcus mutans contributes significantly to dental caries, which arises from homoeostasic imbalance between host and microbiota. We hypothesized that Lactobacillus sp. inhibits growth, biofilm formation and gene expression of Streptococcus mutans. Antibacterial (agar diffusion method) and antibiofilm (crystal violet assay) characteristics of probiotic Lactobacillus sp. against Streptococcus mutans (ATCC 25175) were evaluated. We investigated whether Lactobacillus casei (ATCC 393), Lactobacillus reuteri (ATCC 23272), Lactobacillus plantarum (ATCC 14917) or Lactobacillus salivarius (ATCC 11741) inhibit expression of Streptococcus mutans genes involved in biofilm formation, quorum sensing or stress survival using quantitative real-time polymerase chain reaction (qPCR). Growth changes (OD600) in the presence of pH-neutralized, catalase-treated or trypsin-treated Lactobacillus sp. supernatants were assessed to identify roles of organic acids, peroxides and bacteriocin. Susceptibility testing indicated antibacterial (pH-dependent) and antibiofilm activities of Lactobacillus sp. against Streptococcus mutans. Scanning electron microscopy revealed reduction in microcolony formation and exopolysaccharide structural changes. Of the oral normal flora, L. salivarius exhibited the highest antibiofilm and peroxide-dependent antimicrobial activities. All biofilm-forming cells treated with Lactobacillus sp. supernatants showed reduced expression of genes involved in exopolysaccharide production, acid tolerance and quorum sensing. Thus, Lactobacillus sp. can inhibit tooth decay by limiting growth and virulence properties of Streptococcus mutans.
128 citations
Authors
Showing all 33886 results
Name | H-index | Papers | Citations |
---|---|---|---|
Chiara Mariotti | 141 | 1426 | 98157 |
Pierluigi Paolucci | 138 | 1965 | 105050 |
Andrea Giammanco | 135 | 1362 | 98093 |
Matthew Herndon | 133 | 1732 | 97466 |
Eduardo De Moraes Gregores | 133 | 1454 | 92464 |
Pedro G Mercadante | 129 | 1331 | 86378 |
Alexander Nikitenko | 129 | 1159 | 82102 |
Stephen G. Ellis | 127 | 655 | 65073 |
Peter R. Carroll | 125 | 966 | 64032 |
Mikhail Dubinin | 125 | 1091 | 79808 |
Cesar Augusto Bernardes | 124 | 965 | 70889 |
K. Krajczar | 124 | 646 | 65885 |
Flavia De Almeida Dias | 120 | 590 | 59083 |
Jaap Goudsmit | 111 | 581 | 42149 |
Hans J. Eysenck | 106 | 512 | 59690 |