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Summary  

Many studies have shown that water hyacinth (Eichhornia crassipes) roots can be used to accumulate high concentrations of organic as well as inorganic pollutants. They are currently used to remediate aquatic environments and aqueous solutions. In the present study, sorption of uranium from aqueous solutions by using dried roots of water hyacinth has been investigated. The sorption of uranium was examined as a function of initial concentration, pH, weight of roots and contact time. Five different concentrations 20, 40, 60, 80, and 100 μg . ml-1 were used. Sorption proves to be very rapid and depend on pH, weight of roots and concentration of uranium. Maximum sorption capacity of water hyacinth roots was 64,000 U6+ μg/g. The sorption of uranium by water hyacinth roots follows a Langmuir isotherm.

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Interventional Medicine and Applied Science
Authors:
Mohammed Rifaat Ahmed
,
Ashraf Saad Abou-Halawa
,
Waheed F. Hessam
, and
Diaa’ Salaheldin Aly Abdelkader

Background

Otomycosis is a common ear problem in countries with hot and humid climate. Emergence of new fungal species is a possibility particularly in patients with chronic illness or who receives antibiotics either systemically or topically.

Aim

To identify the otomycotic species, which are responsible for developing the otomycosis.

Methods

A descriptive study was carried out in 63 patients who were clinically diagnosed with otomycosis. Swabs were taken from the fungal debris to identify the causative agent and to determine the effective antifungals against it.

Results

Aspergillus species were the most common agents and were found in 47 patients (74.6%), represented by A. fumigatus (36.5%), A. niger (27%), A. flavus (6.5%), and A. terreus (4.8%). Ketoconazole (90%) and miconazole (76%) were the most effective antifungals against the species obtained from cultures, whereas fluconazole was the least effective.

Conclusions

Although there is no change in the mycology of otomycosis, there is still a significant variability in the isolated species and in their sensitivity to antifungal drugs. Ketoconazole exhibited broad spectrum effect against fungal isolates in this study, whereas fluconazole was the least efficacious.

Open access