MSA Repository "MSAR"

MSAR University's Digital Repository is a documentation and digitization of all university outcomes that are of effective value in the scientific and academic community and reflects the university's image, work, and effective contribution to society Through MSAR Digital Repository, the university managed to collect, store, archive and publish digital content - including documents, audio files, images and data sets - all in a safe place. MSAR is one of the strongest University Digital Repositories in Egypt and documented in the DSPACE community with its latest versions.

Communities in DSpace

Select a community to browse its collections.

Now showing 1 - 5 of 5

MSA Journals 138
A Full content for MSA university Faculties Journals
MSA University Academic Graduation Projects 1153
A Full content for msa university Distinguished Graduation Projects Yearbook
MSA University Academic Research 3691
MSA University Campus 2
Images for MSA University " sites - building - landscape "
RESEARCH & LANGUAGES CENTERS 18

Recent Submissions

Plant-growth-promoting endophytic fungi of some wild plants from harsh habitats in Egypt
(Verlag Ferdinand Berger und Sohne GmbH, 2025-01-02) Ahmed M. Abdel-Azeem; Fatma A. Abo Nouh; Abdelghafar M. Abu-Elsaoud; Bassem A. Balbool
Fungal endophytes act as an immune system to the host plants, allowing them to tolerate biotic and abiotic stresses and promote plant growth. Fungal endophytes might be helpful for agricultural and horticultural applications. Fungal taxa that are recovered from wild plants growing in harsh environments, viz. North Sinai, is a sustainable source of novel bioactive metabolites. We isolated twenty-six endophytic fungal taxa from 6 wild plants (Cakile maritima, Datura metel, Hyoscyamus muticus, Artemisia monosperma, Zygophyllum album and Bassia indica). In the presented study we examined the frequent taxa for abiotic stress tolerance, e.g., salt and drought, the ability of plant growth promoting (PGP) traits production, e.g., Indole Acetic Acid (IAA), phosphate solubilization, ammonia production, and 1-aminocyclopropane-l-carboxylate deaminase (ACC), and the production of extracellular enzymes e.g., amylase, pectinase, chitinase, protease, cellulase, lipase, and urease. Most isolates showed variability in abiotic stress tolerance, production of plant growth promoting, and secretion of extracellular hydrolytic enzymes. Three isolates in this study showed the highest values in stress tolerance and plant growth promotion: Trichoderma atroviride (PP055997.1), Fusarium acutatum (PP038127.1), and Aspergillus terreus (PP038155.1).They were able to produce all the tested extracellular enzymes. According to the current in vitro research, studying fungal endophytes is a valuable strategy for creating systems that could shield various crop species that are vulnerable to drought and salt stress.
Synergetic effect of Camellia sinensis waste extract and zinc oxide nanoparticle for improving performance and appearance attributes of viscose fabrics
(Nature Research, 2026-03-27) Shahd Rasmy; Salwa Mowafi; Mahmoud Suleyman; Hosam El-Sayed
Eco-friendly textile dyeing technologies are increasingly popular because of raised environmental consciousness and the need for less polluting substitutes wefor synthetic dyes. Waste of black tea is an appropriate source of polyphenols and tannins with ecological as well as functional benefits, such as microbial resistance, and antioxidant activity. Herein, a new method for eco-friendlier dyeing and finishing of viscose fabric using black tea waste extract (BTWE) as a sustainable natural colorant for dyeing and functional finishing of viscose fabric was examined. The dyeing conditions, like pH, temperature, dye concentration, and time, were systematically regulated to assign the proper conditions for maximum color strength (K/S). The colorfastness of the dyed fabric against washing, perspiration, crocking, and light was determined. Using zinc oxide nanoparticles (ZnO-NPs) improved the performance of the dyed fabrics by making them more resistant to some pathogens. The results revealed that the optimum dyeing conditions were found to be pH 3, 45 °C, 4% dye, for 60 min. Finishing the dyed samples with ZnO-NPs enhanced the K/S and antimicrobial activity without negative impact on the mechanical strength. The dyed viscose fabric exhibited excellent resistance towards Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria as well as the fungus Candida albicans. The antioxidant activity of the dyed samples was greatly improved compared to undyed viscose fabric. However, enhancement of the ultraviolet protection factor of the dyed fabric was limited, likely due to inadequate surface coverage and lack of coating operations. The discrepancy in the chemical and morphological structures between the undyed and the corresponding dyed viscose fabrics was monitored using Fourier transform infrared spectroscopy and scanning electron microscopy, respectively. The correlation between the different dyeing parameters and the color strength as well as the colorimetric data was assigned using analysis of variance (ANOVA). The findings of this investigation justify the potential application of BTWE as a green colorant for one-pot sustainable dyeing and functional finishing of viscose fabrics.
Game-Theoretic Adaptive Routing and Integrated Security Framework for Multi-Hop LoRaWAN Networks
(Institute of Electrical and Electronics Engineers Inc., 2026-03-20) Abdullah Alajmi; Abdulrahman Ghandoura; Abdelwahed Motwakel; Ghada Abdelhady
Multi-hop Long Range Wide Area Network (LoRaWAN) deployments supporting mission-critical applications face serious limitations when static routing protocols are unable to adapt to changing network conditions or routing-layer security threats. Our analysis indicates that static routing protocols can experience up to 43% degradation in packet delivery ratio under selective forwarding attacks compared to normal operating conditions. Current approaches offer limited capability to autonomously respond to topology changes, device failures, or varying traffic loads. This paper introduces a game-theoretic adaptive routing framework combined with reinforcement learning to dynamically optimize path selection in multi-hop LoRaWAN networks. The proposed framework operates entirely on the network server, while end devices perform only lightweight state reporting, ensuring compatibility with Class A LoRaWAN devices. Trust information derived from security monitoring is incorporated to balance performance objectives with security-aware routing decisions. The approach is evaluated through large-scale simulations with network sizes ranging from 100 to 2000 nodes. The results show consistent improvements in packet delivery ratio and latency compared to static routing across the evaluated scenarios, while maintaining stable performance under attack conditions. Attack detection achieves high precision (92.0%) with a low false positive rate (0.65%), with an average detection time of 26.6±6.8 seconds. Integration overhead remains limited, resulting in minimal additional energy consumption.
Biodegradation of Cyanide-Based Compounds by Rhodanese Produced from Kocuria rhizophila Under Submerged Fermentation and Its Role in Environmental Detoxification
(Multidisciplinary Digital Publishing Institute (MDPI), 2026-03-10) Nada Z. Mahdi; Suhair Sh. Al-Siraj; Nehad A. Taher; Muneefah Abdullah Alenezi; Khyreyah J. Alfifi; Fauzeya Mateq Albalwe; Hanan Khalaf Anazi; Siham M. AL-Balawi; Mahmoud Galal; Maha F. Lotfy; Eman M. Sharaf
Widespread release of cyanide from industrial activities represents a significant environmental challenge due to its acute toxicity and adverse effects on biological systems. In response to this concern, this study focused on the production of rhodanese from Kocuria rhizophila under submerged fermentation conditions and the assessment of its relevance for cyanide detoxification applications. A soil-derived Gram-positive bacterium was isolated and identified as Kocuria rhizophila based on morphological traits, biochemical profile-based VITEK 2 analysis, and 16S rRNA gene sequencing. Preliminary screening confirmed rhodanese production with an activity of 0.968 RU/mL. Under cyanide-induced submerged fermentation, enzyme production followed a growth-associated pattern and reached maximal activity at 40 h under optimized conditions (35 °C, pH 8.0). Partial purification using sequential precipitation and chromatographic steps enhanced enzyme purity, and SDS–PAGE analysis of the final fraction revealed protein bands at approximately 40, 140, and 260 kDa. Biochemical characterization showed Km values of 33.9 mM for KCN and 19.7 mM for sodium thiosulfate, with a Vmax of ~5.6 µmol min−1 mL−1 for KCN and optimal activity at pH 7–8 and 35 °C. Functional assays demonstrated efficient cyanide detoxification, achieving >85% conversion of KCN, ~92% of NaCN, and 65–77% of Ca (CN)2 within 60 min in vitro. Collectively, these findings demonstrate that Kocuria rhizophila represents a promising microbial source of rhodanese with efficient cyanide-detoxifying activity, highlighting its potential for biotechnological and environmental remediation applications.
Effect of Kinetic Control Exercise on Shoulder Dysfunction Post Mastectomy
(Dr. Yashwant Research Labs Pvt. Ltd., 2026-04-04) Alaa Tarek Mostafa ElNawawy; Karim Ibrahim Saafan; Ahmed Salem Salem El fiqi; Haidy Nady Ashem
Background: Post-mastectomy shoulder dysfunction (PMSD) is a common complication that negatively affects functional ability and quality of life. Impairments in scapular stability and motor control contribute significantly to restricted shoulder movement and pain. Kinetic control exercises may improve shoulder function by enhancing muscle coordination and movement efficiency. Objective: To investigate the effect of kinetic control exercises on shoulder function in patients with shoulder dysfunction following mastectomy. Methods: Sixty female patients within age ranged from 40 to 50 were selected from learning hospitals Al Kaser Al Ayni hospital and National Cancer Institution who had undergone unilateral modified radical mastectomy one month after the surgery. They were randomly assigned into two groups. Group A (n = 30) received kinetic control exercises inform of activation local and general Stabilizer, mobilizer, while Group B (n = 30) received traditional therapy inform of stretching and strengthening exercise as shoulder roll, arm circle, wall climb, back climb and hand behind neck. Both groups received three sessions per week for eight weeks. Shoulder range of motion (flexion, extension, abduction, internal rotation, and external rotation) was assessed using a goniometer. Scapular stability and kinetic control were evaluated using a pressure biofeedback unit. Pre- and post-treatment measurements were statistically analyzed. Results: Both groups showed significant improvements in all shoulder range-of-motion measures (p < 0.001). However, Group A demonstrated significantly greater improvements compared to Group B in shoulder flexion, extension, abduction, and rotational movements (p < 0.01). Pressure biofeedback assessment revealed improved scapular stability and reduced compensatory patterns in the kinetic control group. The geniometer results in this study highlight the clear superiority of kinetic intervention protocols in improving shoulder mobility across all ranges of motion. While control groups achieved only modest gains44% in flexion, 3% in extension, 17% in abduction, 22% in adduction, and 8% in internal rotation—the kinetic groups consistently demonstrated far greater improvements, reaching 109% in flexion, 43% in extension, 85% in abduction, 63% in adduction, and 32% in internal rotation. Similarly, biofeedback readings confirmed significant progress in both groups, though kinetic protocols again produced markedly higher gains: flexion improved by over 200% compared to 36% in the control, abduction by 64% versus 28%, depression by 56% versus 33%, and retraction by 18% versus 16%. Collectively, these findings underscore the therapeutic superiority of kinetic interventions in restoring and enhancing shoulder mobility. Conclusion: Kinetic control exercises are more effective than traditional rehabilitation alone in improving shoulder mobility and scapular stability after mastectomy. Incorporating kinetic control into post-mastectomy rehabilitation programs is recommended to enhance functional recovery.