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Article
Kinetics Decomposition of Some Substituted Benzendiazonium Salts in HCl Solution.

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Abstract

AbstractThe decomposition rate, rat constant and decomposition activation energy of substituted benzendiazonium salts ( N+ ≡ NCl-) were calculated by folloing the quantity of nitrogen gas produced as a function of time at several temperatures ranging from (35 to 50)oC. The effect of the R group type on the rate of decomposition ,rat constant and activation energy, was studied. The effect of variation of R group position (o, p, m) has been studied as well.

AbstractThe decomposition rate, rat constant and decomposition activation energy of substituted benzendiazonium salts ( N+ ≡ NCl-) were calculated by folloing the quantity of nitrogen gas produced as a function of time at several temperatures ranging from (35 to 50)oC. The effect of the R group type on the rate of decomposition ,rat constant and activation energy, was studied. The effect of variation of R group position (o, p, m) has been studied as well.


Article
A comparative Adsorption Study for Fe in Ferrosam and Hemavit Drugs on Iraqi Bentonite clay

Authors: Khulood A. AL-Saadie خلود الساعدي --- Ali A. AL-Ma'amar علي المعمار --- Israa M. AL-Mousawi اسراء الموسوي
Journal: Al-Qadisiyah Medical Journal مجلة القادسية الطبية ISSN: 18170153 Year: 2015 Volume: 11 Issue: 19 Pages: 190-197
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

Bentonite clay is widely used in pharmaceutical industry and medical applications. A batch adsorption system has been applied to study the differences between the adsorption of Fe in ferrosam (FeSO4.7H2O) and Fe in hemavit (C4H2FeO4) on the Iraqi bentonite. The adsorption percentage (Q%) of Fe in ferrosam reached to (96.2 - 96.6)% while the percentage for hemavit reached to (71.3- 80.7)% at the temperature range (303-323) K.The adsorption isotherms for ferrosam was a Langmuir type while the adsorption isotherm for hemavit was Freundlich type. Thermodynamics and kinetics parameters of the adsorption of two drugs has been calculated in details. The results were shown that higher adsorption of Fe in ferrosam as (inorganic formula) than the adsorption of Fe in hemavit as (organic formula).

يستخدم طين البنتونايت على مدى واسع في الصناعات الصيدلانية والتطبيقات الدوائية. تمت الدراسة باختلاف امتزاز الحديد في دوائي الفيروسام والهيمافيت على طين البنتونايت العراقي وبطريقة الوجبة. وصلت نسبة امتزاز الحديد في الفيروسام (Q%) الى (96.6-96.2) عند المدى الحراري (303-323) كلفن بينما وصلت هذه النسبة الى (80.7-71.3) في حالة امتزاز الحديد في الهيمافايت في نفس المدى الحراري. بينت ايزوثيرمات الامتزاز بانها من نوع لبنكماير بالنسبة لامتزاز الفيروسام ومن نوع فريندلش بالنسبة لامتزاز الهيمافيت. تم حساب القيم الثرمودايناميكية والحركية لامتزاز الدوائين بالتفصيل, ودلت كل المؤشرات على ان الحديد (بالهيئة اللاعضوية) اي الفيروسام هو اكثر امتزازا من الحديد (بالهيئة العضوية) اي الهيمافيت.

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