The present work aims to study forward osmosis process using different kinds of draw solutions and membranes. Three types of draw solutions (sodium chloride, sodium formate, and sodium acetate) were used in forward osmosis process to evaluate their effectiveness with respect to water flux and reverse salt flux. Experiments conducted in a laboratory-scale forward osmosis (FO) unit in cross flow flat sheet membrane cell. Three types of membranes (Thin film composite (TFC), Cellulose acetate (CA), and Cellulose triacetate (CTA)) were used to determine the water flux under osmotic pressure as a driving force. The effect of temperature, draw solution concentration, feed and draw solution flow rate, and membrane types, were studied with respect to water flux. The results showed an increase in water flux with increasing feed temperature and draw solution concentrations In addition, the flux increased with increasing feed flow rate while the flux was inversely proportional with the draw solution flow rate. The results showed that reverse osmosis membranes (TFC and CA) are not suitable for using in FO process due to the relatively obtained low water flux when compared with the flux obtained by forward osmosis membrane (CTA). NaCl draw solution gave higher water flux than other draw solutions and at the same time, revealed higher reverse salt flux.
تحتل الرقابة المالية والإدارية أهمية كبيرة في عمل المؤسسات وتمثل المرحلة الإشرافية فيها وتُعد من أهم عناصر العملية الإدارية، ويأتي دور الأجهزة الرقابية لضمان تقديم الخدمات للمواطنين، بأسرع وقت، وبأقل جهد وتكلفة. واعتمدت الدولة العراقية منذ تأسيسها على جهاز رقابي خارجي واحد هو ديوان مراقب الحسابات العام المؤسس بالقانون رقم (17) لعام 1927 الذي كان يمارس أعمال الرقابة والتدقيق المالي والحسابي للمصروفات والإير
... Show MoreThis study is concerned with providing an objective, artistic study of the role of women in the pre-Islamic era, and extracting that status from the most important sources that express the language of that era, which is pre-Islamic poetry. The role of women in contemporary societies, the study sought to clarify those goals from a technical and objective point of view, which contributed to the main purpose of the study, which is the status of women in pre-Islamic poetry. The role of women in pre-Islamic society, and how to describe them in rhetorical sentences in poetry. The study was based on the descriptive analytical approach, which is represented by the use of content analysis, wh
... Show Moreالتحول الديمقراطي في بنغلادش
There are many studies regarding the topic of ‘leadership’ in modern era, especially the studies of the west and the Muslims who followed them in our Arab countries. These studies rely on the modern western theories, they deal with topics like the difference between administration and leadership
El Lázarillo señala a fines del reinado del emperador, el comienzo de un
nuevo género en la literatura castellana. A través de sus páginas nos adentró en un
mundo de pobreza, de
hambre secular, de hipocresía, y rodeado de problemas.
Lázaro cuenta en primera persona sus aventuras comenzando por su nacimiento, en
una aceña de las riberas del río Tormes. Condenando su padre como ladrón y, su
madre se entrega al mas vil morisco - cuya conducta deja también que desea –
haber pasado hambre y le entrega, siendo todavía un niño, a un ciego de alma ruin
para que, acompañándole, se gana la vida. Para aplacar el hambre, pues el ciego le
daba poco de comer, el muchacho le hace objeto, de repetidas tretas.
The Arab heritage is considered one of the treasures of the noble human civilizations, as it is a deep-rooted heritage, when the dawn of Islam dawned on the Arabian Peninsula, and when its conquests spanned,
جاء تقسيم البحث على ثلاثة مباحث رئيسة يسبقها تمهيد وتعقبها خاتمة ، وتناول المبحث الواحد مطالب متسلسلة بالأرقام ، ثم قائمة بمصادر البحث ومراجعه. تناول التمهيد نظرة تاريخية للأعيان عند الأقوام ، ولاسيما عند العرب في الجاهلية، وتعريف المصطلحات التي تشكل عنوان البحث تناول المبحث الأول ، وعنوانه (الأعيان في الديانة اليهودية) ، عدد تلك الأعياد، شرح الأسباب الموجبة لكل عيد ، وتاريخ الاحتفال به وأسلوبه؛ وغير ذلك مم
... Show MoreThe research talked about one of the important social subject that care public so cities which is .
This subject deals with three subdivisions papers :-
The first one deals with the reasons of unemployment mentioned the definition of it in addition to make a comparison between it and inertia . then talked specially about unemployment that had got in our wounded country become of wars in it .
It had a branch talked about in Islamic society .
The second one deals with the negative results of unemployment specially economic , moral and social with their roles in spreading negative phenomenon in our society as terrorist , stolen … etc …
The third one deals with the ways of reducing unemployment and trying to limit it , tha
The theme of the individual in Islamic Economics is one of the important topics to demonstrate an established fact , that the Islamic economy may discriminate in granting individual full rights , which guarantees a safe living reassuring
The islamic caliphate was against the Aarab who became Muslims and
stayed in their desert and their companies didn’t share with the Muslims to
spread Islam by Al-Jihad. The Quran attacked them in many verses except
the Aarab who accepted when the prophet called them for Al-Jihad.
The Aarab in the ummayad period were in three categories :
1. The aarab who lived in the desert ,the islamic society was very revenge
towards them. The caliphate did not gave them Al-Ataa so they were in
bad situation
2. Those who lived in the country side . they were very trouble to the
trade.
3. The third lived in the cities and worked in the trade, Dawawin and in the
administration.
The Aarab of cities some of them associ