كلية العلوم

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كلية العلوم هي احدى الكليات التابعة لجامعة الزيتونة. 

من يعمل بـكلية العلوم

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د. عبدالفتاح البشير جمعة البركي
كلية العلوم - جامعة الزيتونة
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أ. محمد فرج الطاهر عبدالصادق
كلية العلوم - جامعة الزيتونة
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أ. ابوبكر اجمد محمد الذيب
كلية العلوم - جامعة الزيتونة

منشورات مختارة

بعض المنشورات التي تم نشرها في كلية العلوم

Genetic basis for alkaline activation of germination in Bacillus thuringiensis subsp. israelensis (2009) MM Abdoarrahem, K Gammon, BN Dancer, C Berry Appl. Environ. Microbiol. 75 (19), 6410-6413

Differences in activation between spores from strains of Bacillus thuringiensis subsp. israelensis with and without the toxin-encoding plasmid pBtoxis are demonstrated. Following alkaline activation, the strain bearing pBtoxis shows a significantly greater germination rate. Expression of just three genes constituting a previously identified, putative ger operon from this plasmid is sufficient to produce the same phenotype and characterizes this operon as a genetic determinant of alkaline activation.
Mostafa Mohamed Abdoarrahem, (10-2009)

Livestock Hydatid Disease (Cystic Hydatidosis) in Libya: A Review (2016). Mostafa M. Abdorrahem and Kawther M. Ibrahem Mohamed M. Ibrahem, Wafa M. Ibrahem. American Journal of Animal and Veterinary Sciences 11 (2), 70-84

Cystic hydatid disease is an infection caused by the larval stage of a cestode parasite called Echinococcus granulosus. Hydatid cysts are one of the major parasitic infections in Libya that causes many health problems to human and responsible for economic losses because of the condemnation of the slaughtered animals infected viscera as well as reducing the quality and quantity of the livestock other productions such as milk, wool and meat. Many abattoir investigations in Libya have revealed that, cystic hydatidosis is a disease which infect a wide range of animal species with variable rates of infection, for example, sheep (1.6 to 40%), goats (5.6 to 70%), cattle (2.7 to 56%) and camels (2.7 to 48%). Based on the available abattoirs data, cystic echinococcosis in livestock can be classified as hyper endemic in the country as the infection rate in all animal species reached almost 50% or over which fulfill the WHO criteria. Because of the absence of accurate and updated government records in all abattoirs, it is difficult to estimate the exact economic losses due to cystic hydatidosis in livestock. Diagnosis of the parasite larval stage (hydatid disease) in the living intermediate hosts (ante mortem) is basically by using imaging and serological methods, while after slaughtering the animals (post mortem), the examination of hydatid cysts can be by inspection of several expected infected organs mainly liver and lungs and to some extent other organs including spleen, kidneys, heart, brain and bones of the animal carcasses. Prevention of cystic hydatid disease primarily focusing on veterinary investigations for controlling the extent and the intensity of echinococcosis in the definitive host populations, which indirectly may lead to control the prevalence of hydatid disease in the intermediate host animals. Treatment of cystic hydatidosis in livestock is still under investigation but anti-helminthes drugs can be used. Regular treatment, taking high degree of precautions when handling pets or dealing with animal meat must be taken into consideration to minimize the level of infection and egg excretion as well as the vaccination of ruminant intermediate hosts, are all in evaluation.
محمد ابراهيم , كوثر ابراهيم . مصطفى عبد الرحيم. وفاء ابراهيم, (5-2016)

On Reflexive Rings with involution

Let R be a ring with involution *. Central quasi-*-IFP *-rings which generalize that of quasi-*-IFP *-rings are introduced. We introduce also the class of weakly *-reflexive *-rings which is a generalization of *-reflexive *-rings and investigate their properties. Moreover, we give the notion of central *-reflexive *-rings which generalizes weakly *-reflexive *-rings. We show that the class of central *-reduced *-rings extends naturally the class of *-reduced *-rings. Furthermore, some basic extensions for *-reflexive and central *-reflexive *-rings are given. Finally, for a quasi *-Armendariz *-ring R, it is proved that R is *-reflexive if and only if R[x] is *-reflexive if and only if R[x; x^{-1}] is *-reflexive.
ا.د اسامة عبدالله ابورواش, (2-2018)
staff photo

د. عبدالمنعم عبدالسلام عبدالله البركي

عبدالمنعم عبدالسلام البركي هو احد اعضاء هيئة التدريس بقسم علوم الأرض بكلية كلية العلوم. يعمل السيد عبدالمنعم عبدالسلام البركي بجامعة الزيتونة كأستاذ مساعد منذ 06-2019 وله العديد من المنشورات العلمية في مجال تخصصه