Evaluation of bacterial contamination and mutagenic potential of treated wastewater from Al-Samra wastewater treatment plant in Jordan.

Jordan is one of the lowest countries in the world in terms of water resources. The reuse of treated wastewater is an important alternative to supply agricultural demands for water. In Jordan, Kherbet Al-Samra wastewater treatment plant (KSWWTP) is the largest and its effluent is mainly used for irrigation purposes.

Inhibition of Streptococcus mutans adhesion to buccal epithelial cells by an aqueous extract of Thymus vulgaris.

Objectives: The aim of this study was to investigate the effect of an extract of Thymus vulgaris (thyme) on the growth of Streptococcus mutans (S. mutans) and the adhesion of this bacterium to human buccal epithelial cells.

Methods: Different concentrations of an aqueous extract of thyme were prepared and the effects investigated on growth of S.

Intracellular localization of glutamine synthetase in a nitrogen-fixing cyanobacterium Anabaena cylindrical.

The major route of ammonia assimilation is the reaction which is catalyzed by glutamine synthetase to give ammonia. Cell-free extracts and purified thylakoid membranes using differential centrifugation and density gradient techniques were assayed for the percentage activity of the enzyme. Glutamine synthetase was detected in all cell-free extracts.

Evaluation of antibacterial activity of aqueous and methanolic extracts of the truffle Terfezia claveryi against Pseudomonas aeruginosa.

Objective: To investigate the antibacterial activities of aqueous and methanolic extracts, as well as, partially purified proteins extracted from Terfezia claveryi aqueous, against Pseudomonas aeruginosa (P. aeruginosa).

Methods: Five percent of the aqueous and methanolic extracts were added to growth medium of P.

A promising peptide antibiotic from Terfezia claveryi aqueous extract against Staphylococcus aureus in vitro.

The antimicrobial activity of aqueous and methanolic extracts, as well as partially purified proteins extracted from Terfezia claveryi aqueous extract were investigated against Staphylococcus aureus in vitro. A 5% aqueous extract inhibited the growth of S. aureus by 66.