Cultivation of the green seaweed Enteromorpha compressa was performed under natural laboratory spring environmental conditions of temperature, light intensity and photoperiod to study the salinity tolerance of this intertidal green macroalga. Cultivation was carried out under artificial seawater (ASW) of different concentrations (18, 35, 53 and 106 g/l sea salt) compared to the control using natural seawater (NSW). Growth rate and pigment content of the cultivated alga were recorded at regular intervals during the experimental duration. Antioxidant activity of the crude ethanolic extract and its fractions (petroleum ether, chloroform, ethyl acetate and acetone) was performed against DPPH radical scavenging assay and compared to the standard synthetic antioxidant butylated hydroxy-toluene (BHT). The finding showed that enhancement of algal growth rate under ASW concentrations of 35, 53 and to a lesser extent at 106 g/L during the first 15 days of cultivation were due to the increased pigment biosynthesis, photosynthetic and metabolic activities and followed by gradual retardation due to the impact of prolonged salt stress. Antioxidant activity of alga was found to be concentration, type of extract and incubation time dependent. Acetone fraction of all salt concentrations showed higher antioxidant activity compared to other fractions. Pronounced activity was recorded at higher seawater conc. (106g/l).
يرسم الشاعر صورة بالكلمات، ومتى ما تتابعت الصور صارت تمثل لوحة شعرية على قدر كبير من الفنية والابداع, وقد أكثر ديك الجن في شعره من هذه اللوحات ويلاحظ القارئ أن الرمز يعمل عملا مهما في تشكيل اللوحة، وظهرت أنواع متعددة من اللوحات منها اللوحة الرثائية, والغزلية, ومن الرموز التي وظفها ديك الجن رمز الظبي, رمز الديك, واستعمل رمز القبر وظهرت لوحات متنوعة في شعره، ومنها اللوحة الخمرية التي تجعل للخمرة احساسا ومشاعر وا
... Show MoreThe research(the internal and external factors affecting the political system in
PAKISTAN) involves a series of effects interact both internally and external to affect the
stsbility of the political system.
Intrernally there are a lot of powers affecting the political map of PAKISTAN such as
military institution, political parties, judgement, religious schools……etc.of internal
factors, which represent one of the most important pressure points on the system.
Externally one of the most important external factors which affect internal stability is
Pakistani allision to USA in antiterrorism war. The Pakistani military institution was
involved in the war against Pakistani tribes leading to unstable security in Paki
The creative arts in general and the theatre in specific represent man's rushing and carving for freedom, goodness and beauty, and the relation between creativity and freedom has always been fluctuating following the censorship pressures of all types and shapes the political, religious and social. Since the theatre is the closest and more touching creative art to the problems of the society of numerous types and levels and it was and has always been playing an enlightening role in shedding light on what the societies experiencing with crises and problems in all directions. The theatre, thus, derives the essence of existence from life, through topics concerned with what the human being is. It seeks to be the real witness and partne
... Show MoreVatan ve hürriyet aşkının ilk ve en Kuvvetli örneklerinden Türkmen topraklarında yetişen yüzlerce Şairlerden biri Hıdır Lütfü’dür. Düşmana yar, öz evladına ağyar, yumuşak tabiatlı, yardımı ve milletini seven bir insandır. Şairin duygusu her dem yükseklere yücelirdi. O bilgili bir şair olduğu için şiirinde türlü türlü bilgi ile ögütleri arkasında bırakmamış onun duygusu bir bulak gibi her dem durmadan coşardı.
Onun en çok sevdiği varlıklar yurdu ile ulusuydı, ve tek acısı onların ilerleme ile yükselemesi içın bir haykırıydı.
Şair her zaman yurdunun ufukunda dolaşıp ulusunun bugünkü ve geleck torunları için yanıklı duyguları ile bir yol gosterıci gibi olmuştur.
ان هدف من هذا البحث هو تحليل محتوى كتاب الفيزياء للصف الرابع العلمي و المقرر تدريسه للعام الدراسي (2018-2017). ولتحقيق هذا الهدف، و بعد مراجعة الادب السابق في ضوء مفاهيم التنمية المستدامة، تم تطوير اداة تتضمن مفاهيم التنمية المستدامة وابعادها، حيث تكونت في صورتها النهائية من 51قضية فرعية موزعة بين المفاهيم الثلاثة الساسية: الاجتماعية، والاقتصادية، والبيئية .وبعد التأكد من صدق الاداة وثباتها، تم تحليل محتوى كتاب
... Show Moreتقويم قواعد إدارة الشركات في ضوء قانون الشركات العراقي رقم 21 لسنة 1997،