The determination of critical micelle concentration of selected non-ionic surfactants (Tween 20,40 and 80) have been investigated using magnetic water(MW)as an aqueous medium.Conductometry technique is used to determine critical micelle concentration.The effect of alcohol addition and temperature variation at the range(293.15 -303.15K) are also pursued. It is concluded that the process of micellization is spontaneous and endothermic because of the observed free energy of micellization (ΔGom) , enthalpy change of micellization (ΔHom), and entropy change of micellization (ΔSom) for the system was also studied.The properties of the non-ionic surfactants were studied, both in absence and presence of alcohol. The results obtained were explained in light of hydrophobic-hydrophilic interactions and chain length of alcohol.The temperature change has slight effect on the micellization process. .
الامم المتحدة وقضايا التنمية في العالم الثالث
The wisdom of the Creator ensures the call of every prophet with a miracle that would be something beyond what is familiar from the customs.the prophet Mohammad (pbuh)whose miracle was the Qur’an in a clear Arabic tongue
النحت العربي في جنوب شبه الجزيرة العربية (اليمن) قبل الاسلام
هدف البحث معرفة نسبة تضمين معايير التنور التقني في محتوى كتابي الحاسوب للمرحلة الإعدادية في العراق عن طريق الإجابة عن السؤال الآتي: ما نسبة توافر معايير التنور التقني في محتوى كتابي الحاسوب المقرران على طلبة المرحلة الاعدادية بفرعيها ( العلمي والادبي ) المعتمدان من وزارة التربية العراقية/ المديرية العامة للمناهج في العام الدراسي (2016-2017 )؟ وتم اعتماد المنهج الوصفي التحليلي، وتكون مجتمع البحث وعينته من محتو
... Show Moreاستهدفت هذه الدراسة تحليل واقع الاقتصاد العراقي على خلفية تحليل القدرة التنافسية بما يفضي الى وضع ملامح عامة لإستراتيجية بناء للقدرة التنافسية الوطنية للنهوض بالواقع الاقتصادي. وقد افترضت الدراسة ان الاقتصاد العراقي يعاني من اخفاقات شديدة في الاداء لا تتصل بطبيعته ولاتعتبر سمة اصيلة من سماته بل هي ظرفية وطارئة رغم وجودها منذ عقود.
ان حالة الوهن المرافق للفعاليات الاقتصادية تتصل بغيا
... Show MoreIt was the sayings of Andalusia scholars in agriculture based on experiments and theories that helped a lot in the success and development of agriculture in the Andalusia ,and also The divisions of the soil and out types and forms it helped a lot of to know arable of non-arable land earth and all off the determination of the color of repentance is important often discovered by agricultural scientists and that helped in the cultivation of certain crops in certain land without another land.and though each particular agricultural crops specific soil in which to live and not live in other soil
The calamities, calamities, problems and constant dilemmas that society is experiencing have made it the responsibility of professors and researchers to find appropriate and effective solutions to these issues, and among those calamities that our societies faced was the problem of the epidemic represented by (Corona-Covid-19),