ISSN: 1817-2695

Volume 33, Issue 1

Volume 33, Issue 1, Winter 2007, Page 1-70

The Electrical properties and conduction mechanism of poly (P- Aminobenzaldehyde) (PPAB) terminated by phenylene Diamine doped with K2Cr2O7

W. A. S Abdul Ghafor; H. K. Ibrahim; K.I Ajeel

Journal of Basrah Researches (Sciences), Volume 33, Issue 1, Pages 1-11

The aim of this paper is the study of the effect of K2Cr2O7 impurity (0.1 mol) concentration on the electrical properties and conduction mechanism of ploy (P-Aminobenzaldehyde) terminated by phenylene Diamine.

The measurements of the electrical conductivity and activation energy of the polymer with impurity through the measuring the (I-V) characteristic in the temperature range (298-348) K .the value of the electrical conductivity vary between (1.76×10-15-4.96 ×10-14) and two activation energy were detected the first was 0.77 eV at the range (298-318) K and the second was 0.27 eV at the range (318-348) K.

The study shows that adding K2Cr2O7 as additive to the polymer lead to alter the conduction mechanism to ionic conduction mechanism at low temperature (298-318) K ,while the hopping mechanism investigated at high temperature (318-348) K.

Usage of okra cuplet as casting sand binder

Sabah Abdel Samad Mahmood

Journal of Basrah Researches (Sciences), Volume 33, Issue 1, Pages 12-15

It has done in this research a new investment which it is the use of okra cuplet which we cut before cooking, as binder material for sand casting instead of famous materials used for this purpose such as cement, date -juice, bentonite...the practical experiments proved that compression strength for sand bounded by this material was ( 18.3 - 46.8 N/ mm 2 ) which is high comparing with date juices ( molasses )
(0.1 - 1.99 N / cm 2 ) and bentonite (36-2.3 N / cm 2 ) with same percentages mixtures , the material proved its successes in moulding and the patterns was very easily with fine smoothness without any sides falling when extracting the pattern .
The mixture percentages were (3 % - 10 %) in weight, max strength was in (9 %) percentage.
Since this material is from waste (actually from rubbish) and it gave such a high compression strength it forms anew strength free binder material.

Effect of Marshlands drying process on regional dust fallout

Abdul Jabbar CH.Hassan; Jameel T.Al-Ali

Journal of Basrah Researches (Sciences), Volume 33, Issue 1, Pages 21-28

This research has been conducted to study the effects of southern Iraqi marshlands desiccation on the amount of dust fallout on Basrah area, due to the soil physical and chemical degredations and the enhancement of wind erosion and dust storms in there desiccated marshlands.
Three wind erosion affected places have been chosen ( Abu-Al-Khasseb , Al-Zubair and Umm Qasser ) as study station .
The Results showed that a significant increasing in the amounts of dust fallout after the desiccating process which reached 9.44 , 23.88 and 24.78 gm.m-2 , 36.70 ,53.88 and 52.74gm.m-2 and 171.50 ,489.50 and 432.30 gm.m-2 during the period ( 1974-1989 ) , (1992-1999 ) and (2000-2004) for ( Abu-Al-Khasseb , Zubair and Umm Kasser )stations , respectively .
The data also ,showed that the falling dust amount was highest in Umm –Qasser followed by AL- Zubair then Abu - AL -Khasseb through out ( May to August ) in compared to the rest at the months in the studied periods.
The Results also showed that the dust texture is simeller to the desiccated marshland soil texture and the numbers of raising dust and dust storms action has been increased after the desiccating process .

The effect of subsoiler (double tines ) plow on some physical and mechanical properties for silty clay soil

Salim . A . Bander; Assad . Y. Khudher; Yousif . Y . Hilal; and

Journal of Basrah Researches (Sciences), Volume 33, Issue 1, Pages 41-48

This research was conducted by a subsoiler (double tines ) plow of mounted type to study its effect on the mechanical and physical soil properties (soil bulk density, soil penetration resistance and soil cohesion ) . The experiments using four depth (25,35,45and 55 cm ) in eultiuoted and uneultiuoted silty clay soils . The results showed that the subsoiler plow reduced the soil bulk density ,soil penetration resistance and soil cohesion by 25% ,78% and 82% respectively . The subsoiler had greater effection the three soil properties as the plowing depth increased especially at plowing depth of 50 cm .

راسة التأثير الضد مايكروبي لبعض مستخلصات نبات الخردل الاسود

Journal of Basrah Researches (Sciences), Volume 33, Issue 1, Pages 49-54

The antibacterial activity studies of the Alcoholic , Flavonoides and glycoside extracts of the plant Brassica Nigra (Seeds) on Gram positive standard strain represented by Staphylococcus aureus and Gram negative standard strain represented by Escherichia Coli and Pseudomonas aeruginosa, also antibacterial activity studied on (100) isolated included Gram positive strain represented by S. aureus and Gram negative standard strain represented by E. Coli , Ps. aeruginosa and Proteus vulgaries.
The results show that the flavonoid and glycoside extract of the plant Brassica Nigra had antimicrobial activity against Gram positive and Gram negative strain in this studies, but alcoholic extract of the plant Brassica Nigra was no antibacterial activity on all strain.
The minimum inhibitory concentration (MIC) was determined. The results showed that the (MIC) of the flavonoid and glycoside extract on Gram positive standard strains S. aureus was (2, 0.5 ) µg/ml respectively, and Gram negative standard strain represented by E. Coli was (0.25, 0.125) µg/ml respectively and Ps. aeruginosa was (1,0.25) µg/ml respectively. The celluler cytotoxicity of flavonoide and glycoside extract was determined by observation of its effect on RBCs. The results found that all these extracts didn't show any cytotoxicity on the concentration (200) mg/ml.

Study of some plant oils effect on Aspergillus flavus L. growth on corn

Hala A. Abdul-Hassan

Journal of Basrah Researches (Sciences), Volume 33, Issue 1, Pages 55-61

The plant oils (Corn oil, Olive oil and Castor oil) have been used at concentrations (0, 2.5, 5, 7.5 and 10) ml/L to study their effects on inhibition growth of A. flavus. The results revealed that olive oil had higher inhibition than other oils at the concentrations (5 and 7.5) ml/L, thus the corn treated with olive oil reduced the infection by A. flavus. The percentage of infection during time (120 and 90) min were (4.1 and 7.4)% respectively. This study showed that the chemical composition of storage corn treated with olive oil and contaminated didn't affect, whereas the storage corn contaminated only affected.

Identification and Study of Electrical Conductivity of Poly aniline- melamine formaldehyde.

Roza A. Salih

Journal of Basrah Researches (Sciences), Volume 33, Issue 1, Pages 62-70

Poly aniline and poly aniline- melamine formaldehyde were prepared. The polymers are identified by FT- IR. and UV spectroscopy.
The electrical conductivity of poly aniline- melamine formaldehyde was studied as a function of temperature, and the conductivity property of polymer is modified by doping the polymer with different ratios of p- toluene sulfonic acid .