The current study aimed to the production and partial purification of a cold-active lipase by som fungi isolated from the olive oil processing wastes in Al-Gabal Al-Gharby, Libya. 31 fungal species from 12 genera were isolated. F. solani was the most prevalent comprising 94% of total Fusarium and 28.7% of total fungi, 102 fungal isolates were tested for their lipolytic activity on lipase production agar medium at 10 and 20°C. The most active isolates were Alternaria (2 isolates), Fusarium, and Penicillium (1isolate for each one). Molecular identification of the most active four isolates was carried out by their sequencing (ITS). The four powerful fungal strains' production of cold-active lipase was maximized by optimizing some nutritional and environmental factors. F. solani AUMC 16063 was able to produce the maximum amount of lipase activity (46.66U/mL/min) with specific activity (202.8U/mg), utilizing ammonium sulphate as a nitrogen source after 8 days of incubation at pH 3.0 and 15°C. However, at same condition after 6 days when yeast extract was employed as a nitrogen source, the generated cold-active lipase displayed the highest specific activity of (1550U/mg) and lipase activity (36.74U/ml/min). This is the first study in which the production, partial purification, maximized and characterization of a cold-active lipase enzyme by Fusarium solani. Keywords: cold active enzymes, Lipase, Fusarium solani, lipolytic activity, specific activity. 

AbstractIn this paper, the focus is on software development methodologies, specifically XP and RAD, in terms of fast-track software development while maintaining quality. It also addresses the high requirements for rapid and effective software development and how some organizations and companies utilize Agile, which supports and encourages flexibility, teamwork, and effective customer relationship management. Initially, the paper discusses the historical evolution of the Waterfall Model and its transformation from its traditional form to the Agile Framework. Subsequently, it highlights the XP and RAD methodologies, providing an overview of both, along with their important stages, benefits, and challenges, focusing on aspects such as pair programming, design and testing, and defining and analyzing prototyping and iteration processes. The comparison illustrates the similarities in terms of strengths and weaknesses and their significance concerning fast-track software development. The paper also references several projects where these methodologies were applied and discusses potential outcomes. It recommends that the optimal and most suitable methodology choice depends on several key factors, such as user participation, gradual development, and teamwork, while considering the trends of fast-track software development in the futureKeywords:XP, RAD, Agile Development, Fast-Track Development, TDD, Prototyping, Iterative Development.

Abstract 

This study investigated the impact of audio-visual aids on the learning of English vocabulary among primary school learners. Additionally, it examined teachers' perspectives regarding the utilization of these aids in teaching English vocabulary to English as a Foreign Language (EFL) learners at the primary level. An experimental research design was employed to gather quantitative data. The data collection involved a closed-ended questionnaire directed at 15 EFL teachers, as well as pretests and posttests administered to 50 students at Sana Almohidaly Primary School in Tiji City. The participants were divided into two groups: a control group, which received vocabulary instruction through traditional methods, and an experimental group, which was taught using audio-visual aids. The collected data were statistically analyzed using IBM SPSS software. The findings indicated that EFL teachers recognize the significance of incorporating audio-visual aids as a pedagogical tool for teaching vocabulary to sixth-grade students in primary schools. Furthermore, the results demonstrated that the achievement test scores of students in the experimental group were significantly higher than those of the control group.

This study contributes to the limited research on the importance of integrating various teaching aids within the Libyan EFL context. The findings underscore the necessity of employing audio-visual aids to enhance opportunities for both teachers and students to develop their digital literacy. Consequently, it is recommended that training sessions, workshops, and additional practice be implemented to increase EFL teachers' awareness of the benefits of utilizing diverse teaching aids in the instruction and learning of English vocabulary

Key words: Audio-Visual Aids - vocabulary-teaching vocabulary using aids-