ISSN: 1817-2695

Volume 34, Issue 2

Volume 34, Issue 2, Spring 2008, Page 1-32

measurement of radioactivity of surface water and sediments by gamma rays spectra in some of Hilla regions

Murtadha shaker Al-NafehiBasim Abd Al- Hassen Al-Mayahi

Journal of Basrah Researches (Sciences), Volume 34, Issue 2, Pages 1-6

Radioactivity had been measured for samples of surface water and sediments by gamma rays spectra that result of use the germanium detector of high purity (HpGe).Five samples of surface water and Five samples of sediments were collected in different regions of Babylon governorate relying on the administrative map of the governorate. The results of measurement radioactivity of the surface water of samples showed that radioactivity for the samples lover than the sensitivity of system by limits (0.5 BqLt).While the results of measured radioactivities of sediments samples showed that there was natural measurement radioisotopes belonging to Uranium-238, Thorium-232 series and Potassium- 40 isotopes. The results also showed that Radium-226, Lead-214 and Bismuth-214 had high concentration in Al-Kifl and clarify at the Al-Kasim regions, however, they were within the limits of allowed with world.

Using Genetic Algorithm To Determine The Architecture for Adaptive Neural Network To Recognize Some Of Arabic Phonemes

Saba abdul w. Alabodey

Journal of Basrah Researches (Sciences), Volume 34, Issue 2, Pages 7-14

The aim of this paper is to determine the best architecture of neural network by using the genetic algorithm to recognize some of Arabic phonetics.

In this paper the recorded speech signal has been processed through two stages. The first stage contains the required calculations of the best locations, while in the second stage the frequencies values and different manipulation have been calculated such as sorting, scaling and selecting three frequencies value to represent each phoneme.

In the third stage the genetic algorithm will be used to determine the architecture of neural network to recognize the Arabic phonemes. The sound signals are recorded by using sound forge 5 , and work done by using Matlab 6.5 and turbopascal7 . As a result the recognition percentage is more than 80% .

Antibacterial activity for two phenolic compounds in Sumac Rhus sp.

G. T. N. Al-Jaber

Journal of Basrah Researches (Sciences), Volume 34, Issue 2, Pages 22-32

Two phenolic compounds was isolated and purified from Sumac Rhus sp. by using thin layer chromatography technique and column technique , which where primary identified by detection of active groups are used , including phenols test and Aldehyde or Keton test , Also using infrared spectra and ultraviolet spectra , the The two phenolic compounds have a high inhibitory activity on four bacterial species including Escherechia. coli ATCC25922 , Staphylococcus aureus ATCC25923 , Brucella sp. , Klebsiella pneumoniae , and it had been noticed that there are synergism phenomenon between the two phenolic compounds in inhibitory of bacteria .