Journal of Basrah Researches (Sciences)

MNDO method has been carried out to determine the most stable structure of the two conforms of mesityl oxide. The final optimized geometry of the stable conform was used as input data for CNDO/S-CI solvent models. Four models depending on the effective virtual charge were used to study the effects of non-specific interactions between the mesityl oxide (solute) and solvent on electronic spectrum of the studied molecule. These models are Germer Model (GM), Tapia Model (TM), Modified Solvaton Model (MSM) & Modified Tapia Model (MTM). CNDO/S results showed that GM was not successful whereas TM has correctly predicted the blue shift on ¹(nπ*) state but it failed for π→ π* transition. MSM & MTM gave good results for the effects of solvent on the electronic spectrum which indicate a blue shift for n→ π* and a red shift for π→ π* transitions when the polarity of the solvent increases, and these results are in excellent agreement with experimental data of solvent effects, but the results of MSM are more precise than that of MTM ). These results are also interpreted by the dipole moments values of the ground state ( 1so) and ¹(nπ*) and ¹(π π*) excited states

In this study the measurement of radon concentration was carried out in the dwellings and multistory buildings in the campus of Basrah Technical Institute (Basrah-Iraq) by using solid state nuclear track detectors. Measurements were made in 50 dwellings and 6 Multistory buildings in the campus of Basrah technical institute. The polymer track detector LR-115 type II is the solid state nuclear track detector was used to measure the radon concentrations inside the rooms in the winter season. The indoor radon concentrations in the rooms of dwellings
and buildings which have been measured are ranging from (13.532) Bq/m3 to (51.176)
Bq/m3. The variation of radon concentration with height of the floor is also discussed. The observed concentrations of radon inside the rooms of dwellings and buildings of the campus are lower than the maximum allowed value 200 Bq/m3 which recommended by International Commission on Radiological Protection (ICRP), therefore all measured radon concentrations are within the safety limits.

Spin polarization parameter or the so –called Sherman function for the scattering of electrons from cadmium atom in the energy range of 6.─4 300 eV and mercury atoms in the energy range of 1- 14 eV are calculated using the relativistic Dirac equation .The projectile- target interaction is represented by an optical potential which consists of a sum of model potentials in the solution of relativistic Dirac equation .The results obtained for the spin polarization parameter are found to be in good agreement with the available calculations

Mishrif Formation is considered as one of the main productive reservoirs in southern of Iraq that comprises an important place into the stratigraphic column of the middle Cretaceous. It reflects the continuous deposition on a shallow carbonate platform developed during theUpper Cenomanian – Early Turonian period. Core samples were collected from selected wells in Tuba oilfield, southern Iraq (Tuba-4, 5, 6,7,8,and 12).Petrographic and microfacies studies have been made by means of microscopic examination of (150) thin sections. Microfacies analysis showed the occurrence of rudist, red and green algae, large and small benthic Foraminifera, Echinoid and Pelloidal zone and they form the major part of micrite or spary calcite groundmass. Five main Paleoenvironment were identified within Mishrif succession represented by deep marine, shallow open marine,restricted open marine, rudist biostrom and shoal. In which there were distinctive distribution of main andsubmicrofacies of diverse in both effect and intensity by dissolution, dolomitization,neomorphism, cementation and micritization. The most effective diagenesis processes were both dolomitization and dissolution. On the other hand, well log analysis revealed the domination of primary porosity (Interparticle and Intraparticle) and minor content of secondary porosity (Vug, moldic and channel). Five reservoir units were identified in the studied sections of Mishrif Formation (mA, mB1-1, mB1-2,mB2-1and mB2-2). These units characterized by a high total porosity located within shoal, shallow open marine and rudist biostrom facies. The reservoir facies of good oil prospects that have been diagnosed are: mud dominated Wackstone, grain dominated, bioclasticpelloidal and/or pelloidalGrainstonemicrofacies,Bondstone,rudistPackstone,coralline algal Wackstone– Packstonemicrofacies and dolomiticLime Mudstone - Wackstonemicrofacies.

We have used the shifted 1/N method to solve the Schrödinger equation with Manning – Rosen potential in two dimensions . This method is primarily tested on the 3D case and then detailed calculations carried out on the 2D case .The energy levels for both cases are listed as a function of the potential strengths ???? and ???? and the screening parameter ???? . A comparison with literature reveals that the 1/N method is reliable and powerful

The dielectric and a.c. conductivity behavior of CB / PVC (cement) composites was studied. The measurements were taken in the frequency range from 1kHz to 1MHz and the

temperature range from 30

P CP to 90

P CP . The composites permittivity ε' shows a strong

dependence on CB loading and increases as CB loading increases until percolation at (~ 13% vol) loading is reached after which decreases sharply to zero . Frequency dependency of ε' show dependence on filler loading, at low CB loading percentages , έ is nearly stable versus frequency
. ε' increases with the temperature rise of the composites. The a.c conductivity increases with the increase of loading and temperature, and shows frequency independency at higher loading.

The aim of this paper is to present an extension of exponential function method in rational form to find an exact solution of coupled Burgers equation. This extended exponential function method in rational form allows us to find extra travelling wave solutions of coupled Burgers equation instead of exponential function method in rational form.

The present study was designed to investigate plasmid profile, the prevalence of
multidrug resistant Staphylococcus aureus, which was done in Basrah, Iraq, during the period between September 2010 and January 2011. A total of seventy six Ear swab were collected from seventy six patients (32 male and 44 female) with chronic and acute suppurative otitis media (CSOM, ASOM) with or without discharges. Thirty five (46.02%) isolates diagnosed as Staphylococcal spp and twenty four (31.6%) as S. aureus isolates from (10 male and 14 female). S. aureus isolates tested for antibiotic susceptibility, high antibiotic resistance to Ampicillin, Carbenicillin, Amoxicillin, Nalidixic acid, and Ceftriaxone , mid resistance to Streptomycin , Erythromycin and Oxacillin, low resistance to Neomycin, Tetracycline, Kanamycin,Tobramycin ,Gentamicin, Clinamycin, Cephalexin, and sensitive to Chloramphenicol, Vancomycin, Ciprofloxacin and Rifampicin . S.aureus isolates showed multiple antibiotic resistance, Such that, two isolates resisted four types of antibiotics. Five isolates were resisted five types of antibiotics. three isolates resisted six types of antibiotics . Five isolates resisted seven types of antibiotics. Two isolates resisted eight types of antibiotics
. Two isolates resisted nine types of antibiotics. Two isolates resisted ten types of antibiotics. Two isolates resisted eleven types of antibiotics. Only one isolate resisted fifteen types of antibiotics. The MAR index of the isolates ranged between 0.2 and 0.75. All isolates harbore Large molecular weight plasmids ranging from (21 – 22) Kbp .

An assessment of air quality by examining outdoor airborne fungi among three sites over four seasons of the year 2009 in Basrah city (Iraq) was made. Gravitational setting method using Petri plates containing agar medium was applied. The results showed that nine fungal genera including 16 species besides the yeasts were prevalent in air samples. The most predominant fungi belonged to the genera Cladosporium, Penicillium, Alternaria and Aspergillus. Highest counts of the fungal isolates were recorded for C. cladosporioides (31.3
% frequency) followed by P. notatum (11.9 % frequency), A. alternata (10.0 % frequency) and Asp. niger (5.8 % frequency). A significant difference
(P < 0.001) in the fungal populations over the four seasons was detected. Winter and summer exhibited higher fungal total isolates than spring and autumn at the studied sites. A correlation coefficient analysis revealed negative values between air temperature and total fungal counts and positive values between air humidity and fungal total counts over seasons. This study provided some information regarding the outdoor air borne fungal composition at Basrah city and suggesting a further investigation to correlate between the common human allergies among the population of Basrah and the high incidence of airborne fungi in outdoor environment of this city.

A new series of potential ligands N-[(sebacoylamino)thioxomethyl]-amino acid were prepared by the reaction of sebacoylisothiocyanate with various aminoacids namely L- histidine,L-glutamicacid, L-tryptophane,L-lysine, the ligands were characterized by IR,UV- Vis , 1H NMR,, 13C NMR spectra , Mass specta ,and CHN .The ML2.nH2O complexes of ligands [M=Cu(II),Co(II),,Ni(II)]were isolated and have been characterized by UV-Vis and IR spectra.

In this study, the increment of silicon atom has been determined and incorporated in
empirical formula to calculate zero-point energies (ZPE) of non-aromatic silicon compounds. The calculated ZPE for 49 molecules containing silicon atom correlates well with the experimental values. The comparison of these results with semiempirical (AM1) ZPE appears very satisfactory.

Indices are the result of attempts to describe physico-chemical changes in water quality (pH, salinity, ammonium, nitrate, phosphate, organic materials,...etc.), there are various indices that used diatoms as bioindicators such as diatomic index, diversity index, diatom assemblage index, generic diatom index, and trophic diatom index. In the present study, samples of water and Planktonic diatoms were collected together in two seasons (Winter 2009 / Summer 2010) from four station (Sindibad, Ashar, Abu Al-Khaseeb and Fao) along Shatt AL-Arab river, a total of 53 species belonging to 26 genera were registered, and the statistical analysis stated that salinity, nitrate, and N:P ratio have an important role in the determination of diatom communities in which there is a negative significant correlation between salinity and the percentage of eutrophic species, and a positive significant correlation between nitrate and the percentage of eutrophic species, also there is a positive strong significant correlation between the study stations were unpolluted except at Abu Al- Khaseeb station in Summer whose water was moderately polluted, but both diatomic index and trophic diatom index values showed that all water stations were polluted, diatomic index values indicated that water stations ranged from slight to moderately polluted, and trophic diatom index values indicated that station waters were either oligo-mesotrophic or mesotrophic state, except at Abu Al-Khaseeb station in which values indicated eutrophic state at both seasons, and the statistical analysis showed significant correlation between diatomic index and both silicate, and percentage of eutrophic species, thus indicated that diatomic index is an a properite index to evaluate the degree of the present study area pollution

The effect of some mono azo dyes compound on the dissolution of C-steel in 0.5M HCl solution was studied using weight loss and galvanostatic polarization techniques .The inhibition efficiency of inhibitor increases with concentration to attain (63.35%,73.28%) of A1and A2 at concentration 5× 10−3 M ,time 240 min and temperature 30°C. Temperature effect on the corrosion behavior was studied at temperature range from 30-60°C , the results showed that inhibition efficiency increased with increasing temperature to attain (75.50%,83.54%) of A1and A2 at concentration 5× 10−3 M , time 240 min and temperature 60°C.The effect of temperature on the rate of corrosion in the absence and presence of these compound was also studied. The activation energy and thermodynamic parameters governing the adsorption process were calculated and discussed . Polarization curves revealed that the studied inhibitors represent a mixed – type inhibitors .Adsorption of inhibitors was found to obey Langmuir isotherm and was isotherm chemisorption type

A Schiff base ligand was prepared via condensation of o-vanillin with sulphapyridine in order to be used as ligand for complexation with Ni(II) , Cu(II) and Fe(III) ions. The structure of ligand characterized by IR , 'H NMR , 13C NMR and mass spectroscopy , the coordination
behavior of ligand towards metal ions investigation via IR , elemental analysis , molar conductance and thermal analysis .The thermodynamic parameter (E, ΔH, ΔS and ΔG) are calculated from thermal data using Coats-Redfern method