School of Sciences

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About School of Sciences

كلية العلوم هي احدى الكليات التابعة لجامعة الزيتونة. 

Who works at the School of Sciences

Dr. Abdalftah Abdalftah Elbori Elbori Elbori
School of Sciences - Azzaytuna University
Mr. Mohamed FARAG Taher Abddalsadegh
School of Sciences - Azzaytuna University
Mr. abubaker ahmed mohamed adib
School of Sciences - Azzaytuna University


Some of publications in School of Sciences

Optimization of Central Patterns Generators (CPGs)

The issue of how best to optimize Central Patterns Generators (CPG) for locomotion to generate motion for one leg with two degrees of freedom has inspired many researchers to explore the ways in which rhythmic patterns obtained by genetic algorithms may be utilized in uncoupled, unidirectional and bidirectional two CPGs. This paper takes as its assumption that the focus on stability analysis to decrease variation between steps brings about better results with respect to the gait locomotion, and argues that controlling the amplitude and frequency may lead to more robust results viz., stimulation for movement
Abdalftah Elbori , (3-2017)

Aflatoxin Contamination of Spices Sold Collected from Local Market in Tripoli

Aflatoxins are considered the most carcinogenic, mutagenic and teratogenic substances found naturally in foods and feeds. These metabolites cause liver damage to humans and to most experimental animal species tested ,Conducted a survey to assess the level of contamination of spices items poisons aflatoxins B1, B2, G1 and G2, and in the local market in Tripoli in Libya during (2014), a (Caraway , Mixed spices , Cinnamon , Black pepper, Red pepper and Cumin). Aflatoxins were determined by High Performance Liquid Chromatography (HPLC). The results were obtained as follows: the average concentrations of aflatoxins B1, B2, G1 and G2 in Caraway (7.1 ± 0.1, 4.9 ± 0.08, 2.4 ± 0.9, 3.1 ± 0.07 µg/kg) respectively, in Mixed spices the average concentrations (3.4 ± 0.2, 1.9 ± 0.04, 1.2 ± 0.03, 0.9 ± 0.09 µg/kg) respectively, in the cinnamon, the average concentrations (6.4 ± 0.06, 2.5 ± 0.03, 3.1 ± 0.8, 0.7 ± 0.01 µg/kg) respectively, in Black pepper, the average concentrations (12.1 ± 0.7, 7.8 ± 0.09, 3.4 ± 0.08, 5.1 ± 0.04 µg/kg) respectively, in Red pepper, the average concentrations (5.2 ± 0.2, 4.4 ± 0.08, 2.2 ± 0.06, 3.1 ± 0.1 µg/kg) respectively, and in Cumin concentrations were an average of (10.2 ± 0.2, 9.8 ± 0.1, 12.12 ± 0.09, 7.6 ±0.1µg/kg),respectively. These results indicate the contamination of spices to aflatoxins B1, B2, G1 and G2 were in various concentrations, this difference depends on the type of the fungus and environmental conditions, as well as the availability of nutrients to the fungu
N. Essawet, (9-2017)

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.
Mostafa M. Abdorrahem and Kawther M. Ibrahem Mohamed M. Ibrahem, Wafa M. Ibrahem, (5-2016)
staff photo

Dr. Mostafa Mohamed Omar Abdoarrahem

Mostafa Abdoarrahem is one of the teaching staff members at the department of biotechnology department in sciences faculty . He is working as assistant prof since 2015-09-01 to 1-9-2019 and now has been promoted to associated prof in his specialty He teaches several subjects in his major and has several puplications in the field of his interest. He has worked as deputy dean of science faculty in bani Walid and the head of zoology department as well as the head of biotechnology department, also he was a member of the quality assurance committee for the University.