http://dspace-su.server.ly:8080/xmlui/handle/123456789/3558 Sun, 03 May 2026 12:59:01 GMT 2026-05-03T12:59:01Z http://dspace.lslab.ly:80/bitstream/id/33827c72-b3d9-4eb2-a572-b817bb062ef2/ http://dspace-su.server.ly:8080/xmlui/handle/123456789/3558 http://dspace-su.server.ly:8080/xmlui/handle/123456789/3602 Urinary Tract Infections and Antimicrobial Resistance: Analysis of Pathogen Prevalence and Treatment Efficacy at Al Manar Laboratory in Derna City Sirte University, Faculty of Science Abstract: This study investigates the prevalence and antibiotic sensitivity of bacterial pathogens responsible for urinary tract infections (UTIs) in patients at Al Manar Laboratory. Data were collected from 51 patients, comprising 44 women and 7 men, aged 15 to 45 years, over a one-month period. The study aimed to identify the bacterial species causing UTIs, assess the effectiveness of various antibiotics, and explore the relationship between gender and infection rates. The findings revealed a significant gender disparity, with 86.27% of UTI cases occurring in females. Staphylococcus aureus and Escherichia coli were the most prevalent pathogens, accounting for 39.21% and 35.29% of the infections, respectively. Antibiotic sensitivity testing showed that Meropenem was the most effective treatment for both S. aureus and E. coli, with sensitivity rates of 93.75% and 100%, respectively. In contrast, other antibiotics like Trimethoprim-Sulfamethoxazole and Clindamycin demonstrated low sensitivity, indicating significant resistance. The study underscores the importance of targeted antibiotic therapy based on sensitivity testing to combat antimicrobial resistance and improve treatment outcomes for UTIs. Additionally, it highlights the need for tailored prevention strategies, particularly for women, who are disproportionately affected by UTIs. Sun, 30 Nov 2025 00:00:00 GMT http://dspace-su.server.ly:8080/xmlui/handle/123456789/3602 2025-11-30T00:00:00Z http://dspace-su.server.ly:8080/xmlui/handle/123456789/3601 Green synthesis of AgNPs from Viburnum tinus plant and some biological applications on the extracts Sirte University, Faculty of Science Abstract: This study investigated the biological activities of Viburnum tinus L. extracts and their silver nanoparticles (AgNPs). Leaves and stems were collected from the Al-Jabal Al-Akhdar region, Libya, and extracted using two solvents: water and ethanol. The biosynthesized AgNPs were characterized using Scanning and Transmission Electron Microscopy (SEM and TEM), revealing near-spherical particles with average sizes of 16.3 nm and 13.0 nm for the leaf- and stem-derived nanoparticles, respectively. The extracts and their corresponding AgNPs were evaluated for antibacterial activity against a panel of bacterial species and for anti-inflammatory potential. The results demonstrated that the silver nanoparticles significantly enhanced the bioactivity of the original plant extracts. The AgNPs exhibited superior antibacterial efficacy and a more potent anti-inflammatory effect compared to the crude extracts alone. Sun, 30 Nov 2025 00:00:00 GMT http://dspace-su.server.ly:8080/xmlui/handle/123456789/3601 2025-11-30T00:00:00Z http://dspace-su.server.ly:8080/xmlui/handle/123456789/3600 Seasonal Environmental Variability Drives Physiological Adaptations in the Thick-Lipped Grey Mullet (Chelon labrosus) of the Southern Mediterranean Sea Sirte University, Faculty of Science Abstract: This study investigated the impact of seasonal variations in temperature, salinity, and dissolved oxygen in Ras Al-Tin lagoon (Eastern Libya) on hematological, liver, and kidney functions of Chelon labrosus. Surface water parameters ranged as follows: temperature (11-23°C), salinity (4.67-23%), conductivity (11-27 mS/cm), and dissolved oxygen (9.5-11.9 mg/1). Blood samples from 40 fish collected seasonally in 2019 revealed significant physiological changes. Hematological results showed peak WBCs (185.32 ± 18.27 x 103/ul) and RBCs (2.75 ± 0.25 x 10/μl) in autumn, while summer exhibited the lowest HGB (5.86 ±1.56 g/dl) and HCT (19.96 ± 6.04%). MCV and MCH peaked in spring (171.10 ± 4.80 fl; 61.15 ± 1.15 pg), whereas MCHC was highest in winter (36.04 ± 1.57 g/dl). Liver enzymes GOT and GPT spiked in autumn (229.75 ± 40.33 U/L; 23.25 ± 2.66 U/L), while LDH surged in spring (1331.00 +86.00 U/L). Kidney function markers urea and creatinine peaked in spring (39.00 ± 5.00 mg/dl; 0.75 ± 0.05 mg/dl), whereas uric acid was elevated in autumn and summer. These findings suggest that moderate temperatures in spring and autumn correlate with heightened metabolic and reproductive activity, supported by increased enzyme levels and hematological shifts. Seasonal extremes (summer/winter) likely induced stress, reflected in reduced Sun, 30 Nov 2025 00:00:00 GMT http://dspace-su.server.ly:8080/xmlui/handle/123456789/3600 2025-11-30T00:00:00Z http://dspace-su.server.ly:8080/xmlui/handle/123456789/3599 The Potential of Using Wild Giant Common Reed Plant (Phragmites australis) as a Source for Biodegradable Plastic Sirte University, Faculty of Science Abstract. The importance of this research lies in reducing the damage caused by wild plants, such as the common reed, to other 5 plants and soil, as well as exploring their potential as environmentally friendly biomaterials. In this study, a simple method was employed to extract cellulose from the stems and leaves of the wild plant. The yield of cellulose was 41.4% from the stems and 26% from the leaves. Subsequently, bioplastic was produced from the extracted cellulose. FTIR analysis characterized the production of the bioplastic film, confirming the presence of specific functional groups. Additionally, the solubility of the films was tested, demonstrating their stability in most organic solvents. The degradation test indicated that these bioplastic films are soluble in soil. Finally, the degree of anisotropy of the bioplastic film was determined using DSC analysis, which yielded a value of 253 °C. Sun, 30 Nov 2025 00:00:00 GMT http://dspace-su.server.ly:8080/xmlui/handle/123456789/3599 2025-11-30T00:00:00Z