Print ISSN: 1812-125X

Online ISSN: 2664-2530

Volume 21, Issue 29

Volume 21, Issue 29, Summer 2008, Page 1-182


Electrical Behaviour of Association Phenomena of Tetra aqua-1,10-phenanthroline Iron (II) Chloride in Methanol-Water Mixtures at Different Temperatures

Y.O. Hameed; F.A. Thanon; S.H. Abdul-Rahman

JOURNAL OF EDUCATION AND SCIENCE, Volume 21, Issue 3, Pages 1-14

ABSTRACT
The electrical behaviour of mixed ligand complex of Fe(II) in different percentage of binary mixture of methanol and water at different temperatures can give information about ion-ion and ion-solvent interaction in solution so the limiting molar conductance , KA the association constant and (R) the main distance between ions in solution as a results of those interaction can be calculated. Thermodynamics parameters (H, G, S) of the association processes and the coulombic forces which play an important role in the association process also have been studied, Walden product also calculated for solvent composition which indicate the tendency of the association of the ions in different percentages.

Synthesis and Characterization of Mn+2 , Fe+2 , Co+2 , Ni+2 ,Cu+2 and Cr+3 Complexes With a Bidentate Schiff Base Ligand

Najla H. Taher

JOURNAL OF EDUCATION AND SCIENCE, Volume 21, Issue 3, Pages 14-22

ABSTRACT
Metal complexes of general formula [M(L)2Cl2] and [Cr(L)2Cl2]Cl {where M is Mn(II), Fe(II), Co(II), Ni(II) and Cu(II) and L (2,3- Bis (N-hexylimino) butane) is a Schiff base formed by condensation of 2,3-butanedione and hexylamine}, have been prepared (in 1:2 metal: ligand molar ratio). The complexes were characterized by analytical, spectral, magnetic and conductance measurements. IR spectra show that the nitrogen of the azomethine groups takes part in coordination. Magnetic measurements and electronic spectral studies suggest an octahedral structure for all complexes. Conductance measurements show a non electrolytic nature of the complexes, with the exception of the [Cr(L)2Cl2]Cl compound with a 1:1 electrolytic nature.

Diazotised Suhphanilic Acid Reagent for the Determination of Trace Amounts of Cephadroxil in Aqueous Solution – Application to Pharmaceutical Preparations

Shilan Ali Omer; Nabeel Sabeh Othman

JOURNAL OF EDUCATION AND SCIENCE, Volume 21, Issue 3, Pages 23-33

الخلاصـة
يشمل هذا البحث تطوير طريقة طيفية بسيطة لتقدير السيفادروكسيل في المحلول المائي تعتمد الطريقة على اقتران السيفادروكسيل مع الكاشف المؤزوت حامض السلفانيلك بوجود هيدروكسيد الصوديوم، لتكوين صبغة آزوية ذات لون اصفر التي تكون ذائبة في الماء ومستقرة وتعطي أعلى امتصاص عند الطول الموجي 445 نانوميتر. كانت حدود قانون بير في مدى 10-240 مايكروغرام سيفادروكسيل في حجم التفاعل النهائي 25 مللتر (0.4-9.6جزء/مليون)، وكانت الامتصاصية المولارية 1.73 104 لتر. مول-1.سم-1 ودلالة ساندل 0.0210 مايكروغرام/سم2، الخطأ النسبي بين – 0.42و+2.22%، والانحراف القياسي النسبي في مدى 1.7 إلى  2.4 % اعتماداً على مستوى التركيز. كذلك تم دراسة طبيعة الصبغة الآزويه المتكونة. وتم تطبيق الطريقة بنجاح في تقدير السيفادروكسيل في المستحضرات الصيدلانية المختلفة.

Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) Complexes with Multidentate Schiff Bases

Kawakeb A. Aziz

JOURNAL OF EDUCATION AND SCIENCE, Volume 21, Issue 3, Pages 34-43

Abstract
Complexes of the type [M(L)2.2H2O]X2 (where M=Co(II) or Ni(II), X=Cl- or NO3-), [M(L)2Cl2] (where M=Cu(II),Zn(II) or Hg(II)) and [Cd(L)2](NO3)2 where L= multidentate Schiff bases ligands (resulted from the condensation of 2,3-butandione or benzil with 2-aminothiazole) 2-oxo-3-imino-(N-thiazole-2-yl) butane (atc) and 1-oxo-1,2-diphenyl-2-imino-(N-thiazole-2-yl) ethane (atb), have been prepared and characterized by elemental analysis, spectral (Infrared, and U.V./Visible), magnetic data and conductivity measurements.
The ligands have been acted as bidentate with Co(II), Ni(II), Cu(II), Zn(II), Hg(II) and tridentate with Cd (II) ions. The prepared complexes had hexacoordinated with octahedral geometries.

Effect of the aqueous extract and some proteinous compounds from Aleo vera leaves on Blood serum glucose and cholesterol levels in normal mice

Safaa A. AL-Ameen

JOURNAL OF EDUCATION AND SCIENCE, Volume 21, Issue 3, Pages 44-53

Abstract
Two proteinous compounds (I and II) had been isolated by gel filtration chromatography of the precipitate produced by full saturation of the aqueous extract of the Aloe vera.
The apparent molecular weights by gel filtration chromatography of the isolated compounds (I and II) were in the range of (63095,19952) Dalton respectively.
The effect of the aqueous extract and the proteinous fractions on glucose and cholesterol levels in normal mice were investigated.
Glucose level was lowered by intraperitoneally administration of the concentrated aqueous extract and the low molecular weight proteinous compound (II) by (41.77% and 36.71%) respectively in normal mice. Furthermore, there was non significant reduction in the cholesterol levels by intraperitoneally administration of high molecular weight proteinous compound (Peak I) by (19.98%) in normal mice. Also there was non significant reduction in the glucose levels by orally administration of (40 mg/10 ml) of low molecular weight proteinous compound (Peak II) by (15.56%).

Synthesis of Some Substituted Benzoxazole [3,4-b] imidazoles

Yaser S. Al-Jawharji

JOURNAL OF EDUCATION AND SCIENCE, Volume 21, Issue 3, Pages 54-61

ABSTRACT
In this paper the synthesis of 4-substituted benzoxazole [3,4-b] imidazole (9,10) and 4-aryl hexahydrobenzoxazole [3,4-b] imidazole (13,14) is reported. Glycine was treated with benzoyl chloride or p-nitrobenzoyl chloride to give N-aroyl glycine (1,2), the reaction of N-aroyl glycine with thionyl chloride followed by treatment the product (3,4) with ammonium hydroxide to give N-aroyl glycine amide (5,6). Treatment of the amide with 1-bromocyclohexanone gave N-methylene-2-hexahydrobenzoxazole) aryl amide (7,8), cyclization of this gave product (9,10), whereas the compounds (13,14) was synthesized from o-aminophenol and the acid chlorides to give N-methylene (2-benzoxazole) aryl amide (11,12) which cyclized with phosphorous oxychloride to give the products (13,14).
The structure of all synthesized compounds were confirmed by physical and spectral data.

Spectrophotometric Assay of Noradrenaline in Pharmaceutical Formulation with Alizarin Red Sulphonate

A. M. S. Al-Delymi; T. S. Al-Ghabsha

JOURNAL OF EDUCATION AND SCIENCE, Volume 21, Issue 3, Pages 62-71

ABSTRACT
A simple, rapid and sensitive spectrophotometric method for the determination of noradrenaline was developed. The method is based on the proton transfer reaction with alizarin red sulphonate (ARS) in aqueous neutral solution to form violet product showing maximum absorbance at 530 nm with molar absorptivity of 6720 l.mol-1.cm-1. The method follows Beer’s law over the concentration range (0.5-10) g.ml-1. The accuracy (average recovery) of the method is 100.29% and the precision (RSD) of the method is less than 1%.
The method was successfully applied for the determination of noradrenaline in pharmaceutical formulation as injection and the results were in good agreement with the standard addition procedure.

Estimation of growth rate, biosilica, protein and lipid content in locally isolated Fragellaria vaucheria

Yosef J. Ismaeel Al-Shahrii

JOURNAL OF EDUCATION AND SCIENCE, Volume 21, Issue 3, Pages 72-81

Abstract
The study was conducted in Mosul city, northern Iraq to obtain a local isolate of the algal, Fragellaria vaucheria (Bacillariophycophyta) . Maximum biomass (58 mg/l) was obtained after seven days of incubation. The ratio of precipitated biosilica in the cellular walls ranged between 30 to 35 % of the dry weight of the biomass. The amount of biosilica increased with progress of incubation period. The infra red spectrum test showed the high purity of isolated silica.
The protein content increased with increase of algal growth and reached 125 mg/l after fifteenth days of incubation, Maximum lipid content (198 mg/l) was obtained after eleven days of incubation. Generally final pH value was higher than the initial one. The algal Fragellaria vaucheria have a wide pH range and the optimum pH for growth was 7.6 .

The condition requiremens for optical bistability in semiconductor laser under injection locking

A. I. Abdullah; M. S. Mohammed

JOURNAL OF EDUCATION AND SCIENCE, Volume 21, Issue 3, Pages 82-93

Abstract
The experimental fulfillment for optical bistability in a semiconductor laser under injection locking is studied. The required setup to provide the stability in current, temperature and power output of the laser diode used in experiments has been described in detail. A small change in the injection power of the slave laser SL could induce a dynamic change of the lasing power of the master laser ML has been observed. Optical bistability for two non identical laser was possible has been experimentally observed.