In this research two analytical methods were developed for the determination of Azelastin as raw material and in Nasal Spray formulation.
The first method was spectrophotometric while the other used the technic of HPLC The first method based on meas
uring the absorbance at λmax 284 nm .
The relationship between the absorbance and the concentration is rectilinear over the range 0.001 – 0.008 g %.
The proposed spectrophotometric method was successfully applied to the determination of Azelastin in nasal spray.
The percentage recoveries were 99.378±1 (10 duplicate readings)1
No interference was noticed from co-formulated drugs.
For the absorbance at λmax the obtained results were in good agreement with which obtained by the Pharmacopeia method.
The substance gave a good separation while the retention time was 1.467 min.
In this research, we did the optical spectral study for using
ultrasound energy in dyeing wool fibers using acid dyes. That we
dyed wool fibers using both traditional dyeing and ultrasound
techniques by using three acid dyes from different firms.
The results of exhaustion percentage of the dye had been compared "the total moving dyes from a solution to fibers after dyeing".
The exhaustion rate of some dyes increased by a large proportion
but the effect on the fastness of the light, rubbing and washing was not great.
The research was performed by isolating some species of soil- fungi from agricultural soils
handling with different pesticides and fungicides. Where the following fungi were isolated:
Aspergillus niger (The isolates A1 and A2), Fusarium oxysporum (
The isolate F),
Trichoderma harzianum (The isolate T). Also F. solani (The isolate F7) and T. viride (The
isolate T.v) were used, whereas they were taken from high studies laboratory- Science
Faculty- Tishreen University at a previous search.
The research was conducted to assay the ability of the previous fungi to degradation a
number of pesticides, the insecticide "Dolan", the insecticide "Plantocide", the nematicide
"Vydate" and the fungicide "Bayfidan", through the effect of double dose of each
pesticides in the biomass of the studied fungi on PDB medium. In addition to analysis the
results residues of pesticides using Spectrophotometer, and evaluation the pH values.
