المستودع الرقمي لـجامعة طرابلس

تم استخدام طريقة كريكينج من النوع الاعتيادي (OK)وطريقة مقلوب المسافة الموزونة (IDW) للتنبؤ المكاني لتلوث مياه الخزانات الجوفية الضحلة لمنطقة طرابلس بمياه البحر عام 2016 .استعملت نسبة سيمبسون كمؤشر لتلوث المياه الجوفية بمياه البحر على عدد 42 عينة. طبقت طريقة كريكنج من النوع الاعتيادي على البيانات قبل وبعد إجراء التحويل اللوغاريتمي، وتم تقدير التركيبة المكانية عبر استخدام النماذج الكروية والأسية والكأسية. وقد استخدمت تقنية التحقق المتقاطع لتقييم عملية الاستنباط الناتجة عن استخدام طريقة (OK) وطريقة (IDW) بقيم أس تتراوح بين (1،5). تم تقييم أداء نماذج الفاريوجرام (Variogram) باستخدام معامل التحديد ( R2) ومجموع مربعات البواقي (RSS)، واستخدم كل من الجذر التربيعي لمربع الخطأ (RMSE) ومتوسط الخطأ النسبي (MRE) لتقييم دقة النتائج المتحصل عليها من تقنية التحقق المتقاطع. أظهرت النتائج أن أداء نماذج الفاريوجرام قبل التحويل اللوغاريثمي كان أكثر دقة، من ذلك المتحصل عليها بعد التحويل اللوغاريثمي، وأن أفضلهم أداءً هو النموذج الكأسي قبل عملية التحويل اللوغاريثمي بقيمة 0.463، 4.30 ،وذلك لكل من(R2) و(RSS) ،على التوالي. كما بينت النتائج وفقاً لتقنية التحقق المتقاطع أن طريقة (OK) عبر استخدام النموذج الكأسي قبل التحويل اللوغاريثمي وطريقة (IDW) بأس مسافة يساوي 1 أعطت النتائج الأكثر دقة، مع الأفضلية لطريقة (OK) بقيم 0.535، 0.246، 0.249 وذلك لكل من (RMSE)، (MRE) و(R2)، على التوالي. وقد أوضحت الخريطة المتحصل عليها من تطبيق طريقة (OK) باستخدام النموذج الكأسي، أنه على الرغم من أن 55.76 %من مساحة منطقة الدراسة صنفت مياهها الجوفية بأنها ذات تلوث طفيف بمياه البحر، إلا أن هناك زيادة في خطورة تلوث المياه الجوفية في الحدود الجنوبية شرقية والشمالية الغربية منها. الكلمات المفتاحية: المياه الجوفية، تداخل مياه البحر، نسبة سيمبسون، الإحصاء المكاني، التحقق. arabic 261 English 5
أحمد إبراهيم خماج, عبدالرحمن أحمد الرياني(10-2020)

Hydroxyethylrutosides (Troxerutin) is a standardized mixture of semi-synthetic flavonoids obtained by substituting hydroxyethyl groups in the naturally occurring flavonol rutin. Because there are four dissociation hydroxyls in rutin, some fifteen kinds of hydroxyethylrutins can be theoretically synthesized. The good quality of the raw material of a drug and the finished product must include the related impurities in an analytical investigation, and this seemed particularly important to the quality control of Troxerutin. According to the literature, it is clear that, the chromatographic analysis of Troxerutin still problematic as its sample can be considered as a complex sample as it contains plenty of different components. In this study, new HPLC technology named fused- core column was used to separate the major components of Troxerutin bulk powder. Fused – Core silica stationary phases represent key technological advancement in the area of fast HPLC separations. These phases are made by fusing 0.5 μm porous silica. The reduced intra – particle flow path of the fused particles provides superior mass transfer kinetics and better performance at high mobile phase velocities, while the fused – core particles provide lower pressure than sub – 2 μm particles. arabic 13 English 77
Sakina Salem Mohammed Saadawi, AMAL .A ABOALLA AMMAR, Mohamed Nouri Mansour El Attug, Amal Khalifa Ali Belaid, ٌRuwida Mohamed Ali Kamour, Tariq Khalifa Masoud Almog(1-2016)

Background: The fat extracted from the nut of the African Shea tree (Vitellaria paradoxa) is called Shea butter. It has multiple uses at the local level as it is used in cosmetic products and as a cocoa butter substitute in chocolate industries. It has a high nutritious value and is also a valuable product on the local, national, and international markets, making it the ideal candidate to research and invest in. Aim: This study is a comparative experimental study of the possible burn healing effects between imported South African raw Shea butter and samples in a Libyan market. Method: The control samples were brought from South Africa (Benin traditional markets). A total of 18 different samples were collected from different sale centers in Tripoli, including pharmacies, beauty shops, and spices shops, in addition to one sample brought from Poland. Animal experiment on burn healing effect was carried out on nine male Sprague Dawley (350–400 g) rats aged 6–8 weeks old. After shaving the animal’s dorsum hair, a metal cube was used to create a deep second degree burn wound, and the cube was heated to 100°C for 20 seconds. Medication with Shea butter (control, T1, and T2) was initiated daily for one for these groups by the application of a thin film of the Shea butter samples on the burned areas. On days 1, 3, and 7, the rats were anesthetised and a sample from the burned scar tissue and skin adjacent were evaluated using pathological parameters. Results: The histological study indicates that the use of Shea butter T1 as topical treatment induces an immune response, which enhances the form of the presence of a large number of inflammatory cells in the epidermis and dermis layers. The treatment of burned skin with T2 lasted for 72 hours and it showed slightly significant healing in the normal structure of proliferative granulation tissue with accumulation of fibroblasts and inflammatory cells surrounding the sebaceous glands and hair follicles. Small areas of the epidermis which formed few layers were observed and some hair roots were grown. This was well seen in cases of T1 and T2. Shea butter bought as raw might have a bad effect on burned skin. Conclusion: Shea butter bought as raw might have bad effect on burned skin. On the other hand, the sample from Poland had a therapeutic effect, which was because of the additives such as avocado oil, grape seed oil, and others. arabic 18 English 101
Sakina Salem Mohammed Saadawi, Soad Ali Abdulsalam Treesh, ٍSuhera Mehemed Abdulsalam Aburawi, , , (11-2020)

Acetylmelodorinol, chrysin and polycarpol, together with benzoic acid, benzoquinone and stigmasterol were isolated from the leaves of Mitrella kentii (Bl.) Miq. The compounds were evaluated for their ability to inhibit prostaglandin E2 (PGE2) and thromboxane B2 (TXB2) production in human whole blood using a radioimmunoassay technique. Their inhibitory effect on platelet activating factor (PAF) receptor binding to rabbit platelet was determined using 3H-PAF as a ligand. Among the compounds tested, chrysin showed a strong dose-dependent inhibitory activity on PGE2 production (IC50 value of 25.5 μM), which might be due to direct inhibition of cyclooxygenase-2 (COX-2) enzymatic activity. Polycarpol, acetylmelodorinol and stigmasterol exhibited significant and concentration-dependent inhibitory effects on TXB2 production with IC50 values of 15.6, 19.1 and 19.4 μM, respectively, suggesting that they strongly inhibited COX-1 activity. Polycarpol and acetylmelodorinol showed strong dose-dependent inhibitory effects on PAF receptor binding with IC50 values of 24.3 and 24.5 μM, respectively. arabic 23 English 159
Sakina Salem Mohammed Saadawi, Juriyati Jalil, Malina Jasamai, Ibrahim Jantan(4-2012)

Spices are any pungent, aromatic plant substances used to flavor food or beverages. Plant foods and agricultural commodities including spices are increasingly subjected to adulteration by design or default. This study aimed to compare home grinded spices against ready locally prepared ones in Libyan market. Chosen spices were compared according to their percentage of yield, organoleptic features, and pharmacognostic parameters as macroscopic and microscopic characteristics, pH measurement, microbial contamination (total viable count and microbial identification), and thin layer chromatography (TLC) chromatogram and diphenyl picryl hydrazyl (DPPH) scavenging activity. From the results, the ready prepared samples showed to have higher percentage of yield compared to home prepared ones. There were no difference in organoleptic test results, macroscopic and microscopic characteristics and pH test results. Bacteria in spices samples were too many to count (TMTC) in most samples, however thyme, rosemary and cinnamon showed better results. The isolated bacteria were identified as Salmonella, Shigella and E. coli species. TLC chromatogram and DPPH scavenging activity test also showed no difference in both sample groups. All these tests indicates that the samples obtained from market as grinded powder and the same samples of spices that was brought as a raw materials and grinded at home had the same characteristics, which indicated that they are of the same quality which not necessary to be a good one. arabic 12 English 75
Sakina Salem Mohammed Saadawi, , , AMAL .A ABOALLA AMMAR, (1-2015)

Oil and its derivatives spills have been a major issue across decades and it is hard to biodegrade even though there are many techniques are being developed to clean up petroleum contaminated soil. Phytoremediation has long been applied as a treatment technology that is cost-effective, ecologically friendly and efficient for the decontamination of hydrocarbon pollution. In this study, four crude oil contaminated soil samples were collected from oil extraction fields in Libya. Three plants were chosen (Malva punilora, Ricinus communis and Triticum repens) on 0.5% and 1% crude oil contaminated soil .The chosen plant species were implanted individually in the contaminated soil pots. Soil sample (triplicate) was taken from each pot at zero time, after 15 days. After 30 days and after 45 days of experiment. Hexane was added to the soil samples, mixed, filtered and the absorbance was measured using spectrophotometer at 360 nm. The results were compared to the standard curve to calculate the crude oil concentration and percentage of removal. As a result the highest percentage of removal of 0.5 % crude oil contaminated soil was by Triticum repens (94%) after 30 days of experiment followed by Malva parviflora(88.5) and Ricinus communis(77 %). While in 1% crude oil contaminated soil pots experiment, the highest percentage of removal was by Malva parviflora (89%) after 30 days of experiment followed by Triticum repens (80%) and Ricinus communis (76 %). Triticum repens showed good results suggesting more field application. arabic 15 English 97
Sakina Salem Mohammed Saadawi, , AMAL .A ABOALLA AMMAR, , (1-2015)

The inhibitory effects of Mitrella kentii leaf and stem extracts on the production prostaglandin E2 (PGE2) and thromboxane B2 (TXB2) and antagonist effect on platelet-activating factor (PAF) receptor binding were evaluated. The inhibition of PGE2 and TXB2 productions were determined using the radioimmunoassay technique, and the inhibitory effect of PAF receptor binding to rabbit platelet was determined using the 3H-PAF as a ligand. Among the extracts tested, ethyl acetate, methanol and hexane leaf extracts, and methanol stems extract showed inhibitory effects on PGE2 and TXB2 productions and antagonistic effect on PAF receptor binding. M. kentii extracts may have the potential of being developed as supplements for inflammatory conditions. arabic 14 English 86
Sakina Salem Mohammed Saadawi, Malina Jasamai, Juriyati Jalil, Ibrahim Jantan(9-2019)

Mosquitoes can transmit more diseases than any other group of arthropods and affect millions of people throughout the world. They act as a vector for most of the life-threatening diseases like malaria, yellow fever and dengue fever. The major tool in mosquito control operation is the application of synthetic insecticides such as organochlorine and organophosphate compounds. Use of many of the former synthetic insecticides in mosquito control program has been limited due to high cost, environmental sustainability, harmful effect on human health, and other non-target populations, their non-biodegradable nature, higher rate of biological magnification through ecosystem, and increasing insecticide resistance on a global scale. One of the most effective alternative approaches under the biological control program is to explore the floral biodiversity and enter the field of using safer insecticides of botanical origin as a simple and sustainable method of mosquito control. This study aimed to evaluate larvicidal and pupicidal effect of five plant extracts (thyme, peppermint and citronella leaf extracts, clove buds extracts and lemon peels extract). Methanol extracts of thyme, peppermint and citronella leaf, clove buds and lemon peels were tested for their larvicidal and pupicidal activity. The standard WHO guideline for larvicides and pupicides evaluation was used. Three plant extract concentrations were prepared (25, 50 and 100 mg/ml) and tested on 20 larvae and 20 pupas (3rd and 4th instars) for each concentration on white enamel trays. Mortality percentage were calculated after 24 hrs. where larvae who doesn’t show swimming movement considered dead. Adult mosquitoes were identified to genus level. Thyme showed the highest % of yield (56%) followed by clove, peppermint, lemon and citronella with 13, 13, 8 and 5 % of yield respectively. The highest mortality % of larvae were by clove with 100% for the three tested concentrations, followed by thyme, lemon and peppermint. Citronella gave no effect as larvicidal agent. In pupicida activity test, thyme showed the highest activity followed by clove. Lemon didn’t show any pupicidal activity. Mosquito was identified as Culex. This result clearly reveals that buds extract of E. caryophyllus and leaf extracts of T. vulgaris and peels extract of C. limonoids could serve as a potential larvicidal agents against the Culex mosquito. The mode of action and larvicidal efficiency of these plant spp. extract should be scrutinized and determined. Besides, further investigation regarding the effect on non-target organism is extremely important and imperative in the near future. arabic 11 English 79
Sakina Salem Mohammed Saadawi, , , (4-2019)