Journal of Basrah Researches (Sciences)

To calculate the shape of the etch pits in the solid state nuclear track detector (SSNTD) with a depth dependent V b , we used the generalized equations for the etch-pit profiles by using the variational principle, since these equations are applicable to the general case where neither the bulk nor the track etch rate is constant, these equations were used for analysis of etch pit shapes, by using cellulose nitrate as a detector, this analysis have been done for the first time.
The calculated shape for the etch pit in cellulose nitrate, using the derived equations with depth dependent V b , are in good agreement with the observed shapes.

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The energy levels of osmium nuclei were studied using the interacting boson model. In order to study the effect of Os on the nuclear properties, cubic terms and the term representing the triaxialty interactions were added to the Hamiltonian of the system. The probability of electric quadrupole transition for these isotopes was calculated. From a comparison of the low energy levels before and after adding the triaxial interactions, the effect of the triple quadrupole interaction term IBM–results 1 (Q×Q×Q) OsP on the energy spectrum of osmium isotopes was clearly shown. The potential energy surface of osmium isotopes was studied and the shape of these nuclei was determined. The obtained results were compared with the available experimental values ​​and through good agreement it was shown that the model is capable of describing the nuclear structure of these nuclei.

The stability of the output intensity of a semiconductor laser with external optical injection is studied by the numerical analysis based on the rate equations model. We investigate the effects of varying the laser operating control parameters on the dynamical behavior of the optically injected semiconductor. The time-series intensity and the corresponding phase – space portraits and the intensity spectra are plotted. We find that the variations of the control parameters lead to different dynamical behaviors through sequence of bifurcations, such as stable oscillations, periodic oscillations, quasi-periodic oscillations, and chaotic oscillations. These laser dynamical behaviors are studied for different values of the laser control parameters.

This research is devoted to the study theOne -Way Multivariate repeated measurements analysis of covariance model (MRM ANCOVA), which contains one between-units factor (Group with q levels) incorporating one random effect, one within-units factor (Time with p
levels) and two covariates ( Z1 , Z 2 ). For this model the covariates are time-independent, that
is measured only once. The test statistics of various hypotheses on between-unites factor, within-units factor and the interaction between them are given, and including the application to study the assessment of water quality of the northern part of shatt AL-Arab river at Basra,Iraq and determine its suitability for aquatic environment ,drinking and irrigation, through studying some variables including the chemical ,physical and biological quality variables that have the greatest effect on water quality in order to find the index of water quality,which is available in the experiment during one year through twelve months.

An epidemiological study were conducted during the period from June 2011 till October 2011. A total of (294) stool samples were collected and examined for intestinal parasites infections. The samples were taken from children (159 male and 135 female) from 1< to 14 years old in two rural villages (Abu-Malah and Harer) found in Basrah marshlands regions.
The total prevalence of infection with Enterobius vermicularis was (50.32% , 44.6%) in Abu-Malah and Harer village, respectively. Moreover, the total prevalence of infection with Entamoeba histolytica and Giardia lamblia was, (23.87% , 30,93%) and (45.16% , 18.7%) in Abu-Malah and Harer village respectively. While, the lower prevalence of infection was recorded for Ascaris lumbricoides and Hymenolepis nana (2.58% , 3.59%) and (3.87% , 6.47%) in both villages, respectively. The total prevalence of infection with intestinal parasites was (75.51%) in both villages.

Screening of secondary metabolites from three fungal species of the genus Drechslera was made. Fungal extraction was carried out by ethyl acetate solvent. Bioactivity of fungal extracts against E. coli and S. aureus by using a disc diffusion technique was examined. All fungal extracts exhibited an inhibitory action against both bacterial isolates.The inhibition zones exhibited by fungal extracts ranged between 22-28 mm diam. MIC test revealed that the extract of D. australiensis exhibited a minimal inhibition values (12.5 and 6.25 ug/L) against
E. coli and S. aureus, respectively. The bioactivities of extracts after being stored for six months at 8 ◦C were slightly decreased as compared with initial freshly prepared extracts. A comparison between the inhibitory action of five commercial drugs and the fungal extracts showed that the extracts rendered a greater bioactivity than the examined drugs, with an exception of chloramphenicol. Chemical analysis showed that extract of D. ausraliensis contains Tannin compounds while D. halodes and D. hawaiinsis contain alkaloids

3,5-dimethoxyphenyl acetate was studied in the presence of Lewis acid catalyst in different type of solvent ( CSR2R , CHR2RClR2R , CR6RHR5RCl and CHR3RNOR2R ) and different temperatures (25oC and reflux ). All the products of the rearrangement were isolated and identified by spectrophotometrically methods. The products were checked by using gas – liquid chromatography and the ortho isomer was the majer one and in many times was the unique.

A new poly ester-urethane –urea has been prepared, characterized and formulated into poly urethane methacrylate elastomer .This polymer was polymerized in a two step process:first synthesis of an isocynate terminated and second reaction of the product with tetramethylenediamine .Thermal analysis of this polymer was showed a good mechanical properties and behave like thermoplastic elastomers.

The theortical calculations of trans 1-furan-2-yl(1-methylpyridinium-2-yl)ethylene(I) cation and its complexes with HF, CHR3R OH and HR2R O respectively (II, III and IV) were carried out by quantum mechanical method. The optimized structures of the cation and its complexes (I,II,III and IV) were obtained by the density functional theory DFT at B3LYP5 level of theory using the basis set 6-31G in gas phase and various solvents . The study shows that the optimized structures of compounds (I, II, III and IV) have the global minimum energy. Global descriptors such as the dipole moment(μ), molecular orbital energy of HOMO and LUMO levels, ∆E, hardness( ), electronegativity(X)and electrophilicity(  ) were determined and used to identify the differences in the stability and reactivity of the compounds. In general the calculated values lead to the conclusion that the stabilities of the compounds according to the values of hardness and energy gap are in sequence II>III>IV>I in various solvents and according sequence II>III>I>IV in gas phase. The theoretical calculations of UV-Visible for the cation and its complexes with HF, CHR3ROH and HR2RO were carried out by TD-B3LYP5 level of theory using the basis sets 6-31G(d,p) and 6-311G(d,p), and the results were compared with experimental data

A spectrophotometric flow injection method for the determination of molybdenum (VI) in water sample based on thiocynate complex formation was applied. A linear line was obtained over the range 0.02- 0.1 µg/ml of Mo (VI).The RSD of this method was found to be 0.015%, and the detection limit was found to be 0.01 µg/ml. The linear curve has a regression coefficient of 0.9997 with sample throughput 78 sample/h. The influence of interferences on this method was studied. The molybdenum (VI) concentrations in Shatt Al-Arab river has been measured, at each of the five stations over 12 months during the period from October 2009 to September 2010, monthly variations were recorded. The results was showed that Mo (VI) concentrations ranged 0.02-0.095 µg/ml. where these results indicated that the average of molybdenum (VI) in study area increasing from north (Qarmat Ali) to the south (Fao).The results point clearly that the concentrations of Mo
(VI) increasing in December 2009,January 2010 and February 2010, especially in station 2 (Ashar) and station 4 (Seeba) which was 0.085-0.095 µg/ml this can be attributed to put waste from industrial sources ,agricultures and human waste and to the waste from Abadan refinery were the molybdenum is valuable catalyst in the refining of petroleum.

Zinc(11) and Iron(11)complexes of octaphenyltetrapyrazinoporphyrazine were prepared, identified and characterized . A study of their thermal, spectroscopic and electrical properties shows the relative thermal stability, effect of solvents on the electronic and the special dc electrical properties.