المستودع الرقمي لـجامعة طرابلس

Locus équations sont des fonctions de régression linéaires dérivés en reliant les apparitions F2 de voyelles différentes à leur correspondant à des états stricts. Cette étude prétend examiner si les équations de locus peuvent être fort phonétiques descripteurs du contraste consonantique entre deux groupes consonantiques pharyngalisés vs non pharyngalisés et l'équation de locus varie-t-elle avec l'accent tonique. Les corpus utilisés sont des mots ayant des séquences C1V1 C2 V2 C3V3. Les résultats obtenus sont conforment à la littérature
Fathi Salem Terfas(6-2019)

Cellular elements of maturing brain are vulnerable to insults, which lead to neurodevelopmental defects. There are no established treatments at present. Here we examined the efficacy of selective adenosine A2A receptor inhibitor SCH58261 to combat brain injury, particularly oligodendrocyte (OL) lineage cells, in young rats. Wistar rats (n = 24, 6.5 days old) were randomly divided into equal groups of four. The sham (SHAM) group received no treatment, the vehicle (VEHICLE) group received 0.1% dimethylsufoxide, the injury (INJ) group was exposed to oxygen-glucose deprivation insult, and the injury+SCH58261 (INJ+SCH58261) group was exposed to the insult and received 1 μM SCH58261. Immunocytochemical experiments revealed that there was a significant reduction in the populations of mature OL (MBP+ OLs) and immature OL precursors (NG2+ OPCs) in the INJ group compared to SHAM group. Furthermore, there was also a significant increase in the percent of apoptotic MBP+ OL and NG2+ OPC populations as evidenced by TUNEL assay. In addition, there was a significant reduction in the proliferation rate among NG2+ OPCs, which was confirmed by BrdU immunostaining. On the other hand, treatment with SCH58261 significantly enhanced survival, evidenced by the reduction in apoptotic indices for both cell types, and it is preserved the NG2+ OPC proliferation. Activation of adenosine A2A receptors may contribute to OL lineage cell loss in association with decreased mitotic behavior of OPCs in neonatal brains upon injury. Future investigations assessing ability of SCH58261 to regenerate myelin will provide insights into its wider clinical relevance.
Mohamed A. Al-Griw, Rabia O. Alghazeer, Nuri Awayn, Ghalia Shamlan, Areej A. Eskandrani, Afnan M. Alnajeebi, Nouf A. Babteen, Wafa S. Alansari(1-2020)

AbstractThis paper examines the process of sending an image over wireless mobile Channels with errors while maintaining bandwidth, transmission speed and image quality. With the tremendous development in networks, new wireless channels have been opened that threaten the security of data transmitted through networks and communication channels, and from this emerged Encryption techniques to increase the security of the transmitted data, and since the digital image compression algorithm is a process to reassemble the parts of the image so that it takes less space, but this increases the impact of the error extension in sending compressed digital images and greatly reduces the quality of the received image. This prompts us in this paper to study the performance of HQAM technology for the purpose of transmitting image data over wireless communication channels containing errors. In this paper, image quality performance has been evaluated by the BER, SNR, PSNR, SSIM, and Correlation evaluation criteria. The simulated results show that there is an improvement in the image quality received using the proposed technique.
wael saleh mohamed abughres, , , Ashrf Alzrouk Almagdob1, Ahmed B. Abdurrhman, Ibrahim A.Nasir, (9-2020)

أجريت هذه الدراسة لتقدير معايير وخصائص منحنى الادارار وتأثير بعض العوامل عليه . استخدم في هذه الدراسة عدد 86 عنزة من السلالة المحلية )م م( وسلالة القبرصي الدمشقي )ق ق( والسلالة الإسبانية مورثيا غرينادا )س س( وهجن المحلي مع القبرصي والإسباني. تم تمثيل إنتاج الحليب الأسبوعي للحيوانات خلال مدة الدراسة ) 28أسبوع( باستخدام دالة جاما غير التامة yn = anb e-cn ، وقد حددت معاملات هذه الدالة شكل المنحنى والصفات المرتبطة بالمنحنى والمتمثلة في إنتاج الحليب عند القمة ) PMY ( وزمن الوصول للقمة (PW) وطول موسم الإدرار L( (. شمل النموذج الإحصائي المستخدم تأثير السلالة ونوع الولادة وجنس المولود. أظهرت النتائج أن متوسط معاملات منحنى الإدرار ) c(،)b(،)a ( كانت 3.44 كجم ، 0.46 ، 0.08 على التوالي ، وقد كانت هناك فروقات معنوية فقط بين )م م( و )س م( ولا توجد فروق معنوية بين )م م( وهجن القبرصي لهذه المعاملات، ولكن نوع الولادة و جنس المولود لم يكن لها تأثير معنوي ) P> 0.05 (. وكذلك بينت النتائج أنه توجد فروقات معنوية بين )م م ( و)س م( لصفتي إنتاج الحليب عند القمة ) PMY ( وطول موسم الإدرار ) L(، بينما لم يكن لها التأثير المعنوي )< P0.05 ( على زمن الوصول للقمة ) PW (. أما العوامل غير الوراثية والمتمثلة في نوع الولادة وجنس المولود فإنها لم تؤثر معنويا ) P> 0.05 ( على صفات منحنى الإدرار. يتضح من نتائج هذه الدراسة أن تهجين الماعز المحلي مع سلالات عالية الإدرار مثل سلالة مورثيا غرينادا أدى إلى تحسن ملحوظ في معايير وصفات منحنى الإدرار.
د. فتحي مصطفى أبوساق, عبدالكريم امحمد احمد أحتاش, د. عياد فرج مجيد, ](1-2020)

لقد تم في هذه الدراسة تخريط الاختلافات المكانية في بيئة نظم المعلومات الجغرافية باستخدام طريقة مقلوب المسافة الوزنية (Inverse Distance Weighting) (IDW) لبعض خصائص التربة الكيميائية، وهي نسبة الصوديوم المتبادل (ESP) ونسبة كربونات الكالسيوم(CaCO3) ودرجة تفاعل التربة (pH) ودرجة التوصيل الكهربائي (EC) والجبس (CaSO4. 2H2O) في مناطق عين حزام، قرية بطة، تاكنس، في شمال شرق ليبيا. تم في هذا البحث استخدام بيانات 220 قطاع تربة ممثل موزعة عشوائياً، بحيث تم استخدام بيانات 198 قطاع تربة ممثل في بناء قاعدة بينات التربة ومن ثم في التنبؤ المكاني لخصائص التربة الكيميائية المشار اليها، بينما استخدمت بيانات 22 قطاع تربة ممثل أختيرت عشوائيا لم تدخل في عملية بناء قاعدة البيانات التي استخدمت في أنتاج الخرائط، وذلك من أجل تقييم النتائج المتحصل عليها في عملية التقدير المكاني للخواص المدروسة. أظهرت النتائج امكانية استخدام طريقة مقلوب المسافة الوزنية (IDW) في تخريط الخصائص الكيميائية المدروسة فى هذه الدراسة لأنها أعطت نتائج يمكن الوثوق بها، وهذا ما أظهرته معايير الجودة والمتمثلة في قيم الجذر التربيعي لمتوسط مربع الخطأ (RMSE) و معامل التحديد (R2) لكل من ESPو CaCO3 و pH و ECو CaSO4. 2H2O. حيث ترواحت هذه القيم 0.157 و 0.54 و 0.045 و 0.027 و 0.008 و 0.94 و 0.88 و 0.86 و 0.85 و 0.83، على التوالي. خلصت هذه الدراسة إلى امكانية استخدام طريقة مقلوب المسافة الوزنية (IDW) فى التخريط والتتبع المكاني لخصائص التربة المختلفة في منطقة الدراسة والمناطق المشابهة، ومن ثم إنتاج الخرائط التفسيرية لهذه الخصائص. كما توصي هذه الدراسة أيضاً بتحديث البيانات المتوفرة عن قطاعات التربة الممثلة فى منطقة الدراسة وذلك لإمكانية تتبعها زمانياً فى دراسات مستقبلية أخري. الكلمات المفتاحية: التتبع المكاني - مقلوب المسافة الوزنية - قطاع التربة الممثل- عين حزام - قرية بطة - تاكنس.
مختار محمود مختار العالم, يونس ضو زايد الزليط, (9-2020)

The Effect of Urea Treated Straws and Urea-Molasses Feed Blocks (UMB) on Reproductive Performance of Libyan Barbary Sheep Mabruk, H.S.1, H .A. Salim1, A. E. Benshaban2, A.E. Ahtash1, H.E.Daeky3 and Z.N. Elmeshabic3 1Animal production Department- Faculty of Agric./Univ. of Tripoli - Libya. 2Ministry of Agriculture/Tripoli – Libya, 3Research station of Faculty of Agric. / Univ. of Tripoli- Libya. Corresponding email: hassan_al_mabrouk@yahoo.co.in ABSTRACT: This experiment was conducted to evaluate the effect of urea treated straws and urea-molasses feed blocks (UMB) on reproductive performance of Libyan Barbary sheep. Total of 78 head of weaned females Barbary sheep were assigned randomly to four groups. Control group received untreated straws, group 1 received straws treated with urea, group 2 received untreated straws in addition to urea- molasses feed blocks (UMB),and group 3 received straws treated with urea plus UMB. The straws were treated with urea (4%). Blood samples were collected for the analysis of progesterone hormone to detect the ovarian activity. The average concentration of progesterone for the three months of age (the seventh, eighth and ninth) was significantly different (P≤0.05 ) between the control (1.47 ng/ml) and the first group (1.76 ng/ml ), and between the second (1.24 ng/ml) and each of the control and first groups and also between the first and the third group (1.56 ng/ml), were it was not significant between the control and the third group. The results showed the percentage of animals reached puberty during the period of taking blood samples, where the female lambs in the first group recorded highest percentage of puberty during the seventh and eighth month of age (33.3%) and (28.57%) respectively, followed by the third group (31.57%) and (26.33%). The study showed highest conception rate, lambing % and twining % in the first group 33.3%, 38%, 4.7% followed by the third group 21, 21%, 0% respectively. The results also showed no significant differences (P≤0.05) in the birth weight of new born lambs between groups. The averages weights were 3.76, 3.63, 3.11 and 3.82 kg in the control, first, second and third groups, respectively. It is clear that urea has no negative effect on the reproductive performance, and can be used safely to increase the nutritional value of the straws. Keywords: Sheep, straw, Urea, Progesterone.
Hassan Mabrouk, Abdulkarim Ahtash, Hussein Salim, Hassan Deaky(1-2020)

Flavonoids have been shown to have antioxidant factors and effective against hepatotoxicity. This in vivo study aimed to evaluate the efficacy of flavonoids rich extracts in a model of chemicalinduced liver cell injury. Materials and Methods: Flavonoids were extracted from leaves and flowers of Arbutus pavarii using Microwave assisted extraction method. Different concentrations of extracted flavonoids (200, 500, 1000, 2000 and 5000mg/kg bw) were evaluated up to two weeks on mice model. The hepatoprotective effects of the extracts were examined using mice pretreated orally with 200 and 400 mg/kg bw of flavonoids extracted from leaves and flowers as well as their combination (200 mg/kg; 1:1) for 28 days. At day 28, the mice were received orally a single dose of 1ml/kg CCl4 in corn oil. Forty-eight hours after Carbon tetrachloride (CCl4) treatment, the animals were sacrificed and their liver and blood samples were collected for determination of biochemical parameters (Alkaline phosphatase (ALT), Aspartate-aminotransferase (AST) and Alanine-aminotransferase (ALP)), histopathological investigation and antioxidant status. Results: Treatment of the mice with a daily dose of flavonoids extracts up to 5 g/kg bw did not cause mortality and did not show hepatotoxicity. Pretreatment with extracts decreased the increased serum levels of ALT, AST, and ALP, decreased lipid peroxidation and maintained the levels of glutathione and antioxidant enzymes status in the CCl4 treated mice, especially in the group treated with combined extracts. The hepato-protcitve effects were confirmed by histopathological examinations. Conclusion: The results shown by the extracted flavonoids need further investigation.
Rabia Alghazeer, Sana Elgahmasi, Abdul Hakim Elnfati, Mohamed Elhensheri, Mohamed A. Al-Griw, Nuri Awayn, Mariuma El- Nami(3-2018)

Maternal exposure to environmental chemicals can adversely affect fetal health. This study aims to identify, in-vivo, the risk of maternal exposure to trichloroethane (TCE) on the birth weight and the neurobehavioral performance of newborns. Groups of female albino mice (F0 generation) were injected intraperitoneally twice weekly for three weeks with TCE (100 and 400 µg/kg BW). Animals were followed up for signs of toxicity and mortality. Neonate's motor behavior including large movement (crawling, pivoting, righting) and small movement (tremor) were assessed. No toxicity adverse signs or mortality were observed in the animals (F0 generation) treated with TCE. The results showed that TCE exposure led to a significant increase in the F1 mouse body weight compared to controls. The results also showed that tremor of neonates of dams exposed to TCE (100µg/kg and 400µg/kg BW) were significantly increased when assessed on postnatal day-1 (PND-1). These findings provide support to a role of the environmental toxicant, TCE, in abnormalities in birth weight and neonatal neurobehavior.
Mohamed A. Al-Griw, Massaud S. Maamar, Naser M. Salama, Lubna N. Algadi, Abdul Hakim S. Elnfati, Emad M. Bennour(9-2015)