Preferred Language
Articles
/
alkej-194
Prediction of Oxygen Mass Transfer Coefficients in Stirred Bioreactor with Rushton Turbine Impeller for Simulated (Non-Microbial) Medias
...Show More Authors

 Abstract

The study of oxygen mass transfer was conducted in a laboratory scale 5 liter stirred bioreactor equipped with one Rushton turbine impeller. The effects of superficial gas velocity, impeller speed, power input and liquid viscosity on the oxygen mass transfer were considered. Air/ water and air/CMC systems were used as a liquid media for this study. The concentration of CMC was ranging from 0.5 to 3 w/v. The experimental results show that volumetric oxygen mass transfer coefficient increases with the increase in the superficial gas velocity and impeller speed and decreases with increasing liquid viscosity. The experimental results of kla were correlated with a mathematical correlation describing the influences of the considered factors (the overall power input and the superficial gas velocity) over the studied rages. The predicted kla values give acceptable results compared with the experimental values. The following correlations were obtained:

Air/water system

View Publication Preview PDF
Quick Preview PDF
Publication Date
Sun Apr 07 2013
Journal Name
Journal Of Educational And Psychological Researches
The effect of relaxation music in reducing symptoms of dental anxiety
...Show More Authors

Many behavioral researchers pointed out the importance of relaxation techniques in the treatment of different psychological disorders where find  the importance of these techniques in reducing anxiety and stress and the resulted of behaviors and habits, with the development of these techniques are being used to gain public health, whether mental health or physical or mentality, and one of these techniques is music therapy that reduces tension and anxiety and operates a state of relaxation, which is used in the treatment of  patients of dental clinic.                        

Re

... Show More
View Publication Preview PDF
Publication Date
Wed May 18 2016
Journal Name
Al-academy
Representations of women in the subject of freedom: سهاد حسن مانع
...Show More Authors

Artist kicks off in his production through creative artistic assimilation to the production of concepts and experiences, which can decode the artist blades through the re-built and converted to the subject of my mind according to the processes of analysis and synthesis. Artist need the expertise and experience to complete the technical work, and to develop taste aesthetic, and achieve certain goals belonging to Resume artist, diversity of artistic experiences between mechanism represents a female form and expression of contents and visions that carry letters of freedom in accordance with the creative visual surfaces embody the image of women, the main speeches adopted by propositions technical artists, and artists who relied female form

... Show More
View Publication Preview PDF
Crossref
Publication Date
Wed Sep 18 2019
Journal Name
Journal Of Legal Sciences
التجرد من الميول الذاتية لدى القاضي الجزائي
...Show More Authors

قال تعالى )) ان الله يأمركم أن تؤدوا الامانات الى اهلها واذا حكمتم بين الناس

ان تحكموا بالعدل (( 1. فالاية تفيد انه يجب على كل مؤمن ان يحافظ على الشئ

ويرعاه ويؤديه الى صاحبه، ومايهمنا هنا هو الجزء الثاني من هذه الاية والمتعلقة

بعدالة الحكم الصادر من قبل متولي القضاء. فالقضاء بين الناس ليس عملا عاديا،

بل يمكن القول انه ليس عملا آدميا انه عمل الهي، وانه لتجاوز كبير ان يكون

القاضي بشرا ولكنه بش

... Show More
View Publication Preview PDF
Crossref
Publication Date
Fri Dec 01 2017
Journal Name
Journal Of Legal Sciences
الحماية القانونية لأقلية المساهمين من مخاطر الاستحواذ
...Show More Authors

Contributing companies consist mainly of two categories of shareholders: the majority and the minority. The first category (majority shareholders) means the controlling shareholders of the companies capital and its board of directors and voting at its general assembly meetings without the second category (minority shareholders), especially the acquisitions and risks to the company. We find that the Egyptian legislator has created legal protection for a minority of these risks, by forcing the acquiring party to make a mandatory purchase offer for the remaining shares in the company, at least the highest rate of acquisition of the capital of the company, Nahina on the application of the principles of corporate governance and its importance

... Show More
View Publication Preview PDF
Crossref
Publication Date
Thu Feb 07 2019
Journal Name
Journal Of The College Of Education For Women
أسباب الكذب عند الأطفال من وجھة نظرالمعلمین
...Show More Authors

The current research tries to study the reasons for lying since its
inception, as it is interesting to a child's moral growth, which can benefit from
the results of this research by institutions of socialization, parents and
teachers in the treatment and care of children.
The objective of this research is to highlight the reasons for lying to the
children from the viewpoint of teachers and the answer to the paragraphs of
research designed research instrument (questionnaire) was distributed to a
sample of teachers was clear from the analysis that the reasons lie that
received a high percentage of members of the sample are: -
- The fear of severe punishment
- Child rid himself of a specific problem
- To sat

... Show More
View Publication Preview PDF
Publication Date
Thu Jun 15 2023
Journal Name
Journal Of Legal Sciences
Estimating Compensation Due to those Affected by Terrorist Acts
...Show More Authors

      The research aims to study the estimation of compensation due to those affected by terrorist acts, guided by the legal systems in the Kingdom of Saudi Arabia and the experience of the French and Egyptian legislators, beginning with the dispute over the definition of terrorist act, and analyzing the extent of countries’ commitment to compensating those injured by terrorist acts, the legal basis for compensation for damage, and how the injured person is entitled to compensation and its relationship to standards Compensation and how to estimate it.

              The research reached several results, including the multiplicity of legal t

... Show More
View Publication Preview PDF
Crossref
Publication Date
Wed Feb 20 2019
Journal Name
Political Sciences Journal
Arabian Gulf from the GCC countries to the EU
...Show More Authors

The Gulf Cooperation Council (GCC) is the only one in the Arab system, which has been able to formulate a strategic vision with its dimensions and objectives, and that for its great achievements have contributed significantly to the development of the external and internal economic relations of the Gulf Cooperation Council six through the consolidation of economic policies, projects and joint institutions . There is no doubt that the establishment of the Cooperation Council for the Arab Gulf States six, has made security expensive as long as the aspiration to them the leaders and peoples of the region is the adoption of the GCC countries on itself in order to build a self strength ensures cut off the road to all interference in the affai

... Show More
View Publication Preview PDF
Crossref
Publication Date
Mon Mar 01 2004
Journal Name
Al-academy
تصنيع الطابوق الحراري الثقيل من خامات محلية
...Show More Authors

تصنيع الطابوق الحراري الثقيل من خامات محلية

View Publication Preview PDF
Publication Date
Sat Jul 01 2006
Journal Name
Political Sciences Journal
من نحن ؟ التحديات التي تواجه الهوية الامريكية
...Show More Authors

من نحن ؟ التحديات التي تواجه الهوية الامريكية 

View Publication Preview PDF
Crossref
Publication Date
Wed Dec 30 2020
Journal Name
Journal Of Planner And Development
Enhancing livelihood through urban intensification
...Show More Authors

 The research deals with a modern concept in its applications and the studies it deals with, as the concept of urban densification is one of the most recent sustainable development strategies for cities.

Studies looking at the relationship between condensation and viability show mixed results. This study sheds light on how the built environment of dense urban areas affects the perceived quality of life of the population. How to enhance acceptance of dense life is an important question to investigate.

Adopting the concept of urban densification in city planning policies to be more sustainable and livable is of great importance by achieving efficient use of urban land and limiting urban sprawl, as well as reducing the

... Show More
View Publication Preview PDF