The effect of oxygen concentration on the melting of this eutectic was investigated by DSC. In the deoxygenized solution,
an endothermic peak attributed to the eutectic transition was observed in the course of heating, and its peak temperature
is around −21.5°C. Another endothermic peak appeared at lower temperature in the presence of oxygen. As the oxygen content
in the solution increases, the temperature of this peak is shifted to lower temperature. The transition at the lower temperature
are associated with the melting of eutectic carrying oxygen. The same results are given in the NMR data.
This study may present first total bacterial counts estimated in Lake Timsah and El-Teloul and Mesafaq Basins of Bardawil Lagoon using the dilution culture technique followed by filtration through 0.2 µm cellulose nitrate filters and examined by epifluorescent microscope after staining with acridine orange. Also, the staining of bacterial cultures with acridine orange in metabolically active and inactive states was investigated using direct epifluorescent filter technique. Generation time of Lake Timsah bacterial cultures was 2.04 generations day
and growth rate was 0.049 h
. In Bardawil Lagoon doubling time was 3.3 and 1.79 generations day
for samples collected from El-Teloul and Mesafaq, respectively. The growth rates were 0.09 and 0.04 h
for El-Teloul and Mesafaq Basins, respectively.
Authors:Elisabetta Oddo, Gianni Russo, and Francesca Grisafi
al., 2014 ).
Puccinellia distans , or weeping alkali grass, is a C3 perennial, cool-season halophytic grass, which grows in saline environments throughout the world. Salt stress affects plant growth and metabolism mainly through ion
Neutron Activation Analysis is a sensitive technique for the determination of more than seventy elements at the trace concentrations.
The NAA analysis of biological and environmental matrices suffers from interferences caused by the presence of high concentrations
of activated salts in these matrices. The high gamma-ray activities of these activated salts mask the low gamma-ray activities
of short half-lived isotopes (e.g.,66Cu,56Mn,28Al and52V) necessitating the rapid separation of trace metals from high concentrations of salts. Poly-5-vinyl-8-hydroxyquinoline has
been used to develop a new method to rapidly and quantitatively precipitate aluminum, copper, vanadium and manganese from
neutron-activated biological and environmental matrices.
Aliasgharzadeh, N.N., S. Rastin, H. Towfighi and A. Alizadeh. 2001. Occurrence of arbuscular mycorrhizal fungi in saline soils of the Tabriz Plain of Iran in relation to some physical and chemical properties of