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

Mr. abubaker ahmed mohamed adib
School of Sciences - Azzaytuna University
Dr. Ragab Mohamed Amer Almasrub
Math Department - School of Sciences
Dr. Ragb Omer Mohamed Saleh
School of Sciences - Azzaytuna University


Some of publications in School of Sciences


This paper explores the effect of bidirectional central pattern generators (CPGs) on the fitness function using the Genetic Algorithm. It approaches this issue from two broad perspectives: the first is concerned with answering the question "Do small changes in some CPG parameters result in different walking gaits?" and the second is concerned with answering the question, "What are the underlying constraints that render the optimization of bipedal locomotion in robots feasible?" These concerns can thus be seen as leading to one general objective: to investigate how bidirectional two CPGs can best be optimized to generate effective rhythmic movement patterns. This paper, however, takes as its assumption, that unlike uncoupled and unidirectional CPGs, which result in instability, optimizing bidirectional two CPGs do not only enhance movement but also produce rhythmic patterns akin to the rhythmic patterns derived from real data that is not provided with input or any sensory feedback.
Abdalftah Elbori, Mehmet Turan, Kutluk Bilge Arikan, (7-2017)


In this paper, with the aid of the Wolfram Mathematica or Matlab software the powerful, the Adomian decomposition method (ADM) is used to found the numerical solution of Lorenz chaotic system. It is shown that the method is straightforward and effective mathematical tool for solving this system. We make a comparison between our method and another method to illustrate the accuracy of this method. Finally, we submit comprehensive conclusions.
Aafaf E. Abduelhafid, (5-2018)

Natural Incidence of Aflatoxins and Ochratoxin A Nuts Collected from Local Market in Tripoli

Aflatoxins and ochratoxin A are mycotoxins produced by fungi belonging to the Aspergillus and Penicillium genera. The present study was carried out to study the natural occurrence of aflatoxins (AFS) and ochratoxinA (OA) in 90 nut samples collected from Tripoli, Libya during 2013 were determined by using a high-performance liquid chromatography technique. Aflatoxins B1, B2, G1 and G2, in the local market in Tripoli Libya during summer, 2013. Natural occurrence of aflatoxin B1, B2, G1 and G2 in almonds, Br. almonds, hazelnuts, cashews, walnuts and peanuts samples collected from local market in Tripoli. The percentages of positive samples with aflatoxins were 33.3, 40.0, 20.0, 13.3, 26.6 and 53.3% for almonds, Brazilian almonds, hazelunts, cashews, walnuts and peanuts, respectively. The concentrations of aflatoxin B1 were ranged between (0.9-5.3, 1.4- 7.8, 1.2 -5.4, 2.1- 3.4, 1.6-7.8 and 2.4-10.9 µg/kg) for almonds, Brazilian almonds, hazelunts, cashews, walnuts and peanuts, respectively. Aflatoxin B2 were found in Brazilian almonds ranged from (2.2-3.5 µg/kg) and in peanut (7.6-8.4 µg/kg). These results indicate the contamination of nuts with aflatoxins B1 and B2 were in various concentrations, this difference depends on type of nuts and environmental conditions, as well as the availability of nutrients to the fungus. The percentages of nut samples (almonds, Brazilian almonds , hazelunts, cashews, walnuts and peanuts) were contaminated with ochratoxin A 26.6, 33.3, 13.3, 20.0, 13.3 and 33.3%, respectively, also the concentrations were ranged between (3.5-5.0,1.5- 2.2, 1.2 -3.7, 1.3- 2.5, and 4.0-6.5 µg/kg) for Brazilian almonds, hazelunts, cashews, walnuts and peanuts, respectively. However almonds free of ochratoxin A. The highest concentration found in peanut samples (6.5 µg/kg). The difference concentration of AFS or OA may be depends on type of nuts and environmental conditions, as well as the availability of nutrients to the fungu
N. Essawet, (9-2017)
staff photo

Dr. Giuma Saleh Isa Abudagel

Giuma Abudagel is one of the staff members at the department of 10159 faculty of 1. He is working as a since 2008-09-01. He teaches several subjects in his major and has several puplications in the field of his interest.