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.

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MSA Journals 134
A Full content for MSA university Faculties Journals
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MSA University Academic Research 3786
MSA University Campus 2
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RESEARCH & LANGUAGES CENTERS 18

Recent Submissions

Carbon dioxide valorization: paving the way for climate change mitigation and a sustainable future
(Springer Nature, 2025-08-28) N. Sh. El‑Gendy; A. M. Rabie; M. A. Abo El‑Khair
The global rise in carbon dioxide (CO2) emissions, primarily from the combustion of fossil fuels, poses a major barrier to meeting the Paris Agreement target of limiting global warming to 1.5 °C. A transition to a low-carbon economy is essential to mitigate climate change and its potential consequences. Carbon capture, utilization, and storage (CCUS) technologies offer promising solutions by capturing CO2 from major emission sources and converting it into valuable chemicals and materials. This review provides a comprehensive overview of key CO2 sources and recent developments in CO2 capture technologies, encompassing chemical absorption, adsorption on solid materials, chemical looping, and membrane separation. Additionally, it explores various pathways for CO2 conversion into high-value products, such as methanol, dimethyl ether, acetic acid, and synthetic fuels, alongside emerging applications like graphene, cyclic carbonates, and alkyl/aryl carbamates. The potential of syngas production and the emerging photocatalytic reduction of CO2 are also discussed. The review also discourses the challenges to the widespread adoption of CCUS technologies, encompassing economic, technical, and infrastructural barriers, while highlighting prospects for enhancing their implementation. Environmental trade-offs such as water and resource intensity, lifecycle emissions, and risks of CO2 leakage are addressed to ensure sustainability. The review underscores the alignment of CO2 valorization technologies with the global climate goals. By fostering technological advancements, policy support, and international cooperation, CCUS can serve as a transformative pathway to mitigate climate change, reduce industrial carbon footprints, and drive sustainable innovation across sectors, achieving the environmental, economic, and societal sustainability.
Influence of substance loss and restoration materials on the fracture resistance of 1-piece endodontic crowns: An in vitro study
(Elsevier Inc., 2025-08-30) Abdulaziz Samran; Mohamed Elbeshri; Ahmed Wagdy Hashem; Shadi El Bahra; Shurouk Ali; Ahlam Smran; Sebastian Wille; Matthias Kern
Statement of problem: How different restorative materials designed for computer-aided design and computer-aided manufacturing (CAD-CAM) and substance loss affect the fracture resistance of endodontically treated maxillary first premolars restored with 1-piece endodontic crowns is unclear. Purpose: The purpose of this in vitro study was to assess the impact of various CAD-CAM restorative materials and residual tooth structure on the fracture resistance of endodontically treated maxillary first premolars restored with 1-piece endodontic crowns. Material and methods: Sixty-four maxillary first premolars were endodontically treated and divided into 4 main groups (n=16) according to the restorative material: ZP: Zirconia 1-piece endodontic crowns group (IPS e.max ZirCAD Prime; Ivoclar AG); RM: Resin-modified 1-piece endodontic ceramic crowns group (Katana Avencia; Kuraray Noritake Dental Inc); LD: Lithium disilicate 1-piece endodontic crowns group (IPS e.max CAD; Ivoclar AG); and CG: A control group restored with zirconia posts, composite resin cores, and lithium disilicate crowns (IPS e.max CAD; Ivoclar AG). Teeth in subgroups had either 1 or 2 residual coronal walls (n=8). All specimens underwent dynamic loading for 1 200 000 loading cycles in a masticatory simulator. A universal testing machine was then used to quasi-statically load the specimens at 30 degrees until fracture. For the statistical test, the Generalized Linear Model (GLM) with a gamma distribution and log link function was chosen (α=.05). Results: None of the specimens showed any signs of debonding or fracture during the fatigue test. Mean ±standard deviation fracture loads ranged from 247.6 ±70.2 N (for group RM1) to 1211.5 ±243.2 N (for group RM2). A statistically significant increase in fracture resistance was observed with the increasing number of walls (P<.001). However, different CAD-CAM restorative materials did not affect the fracture resistance of endodontically treated maxillary first premolars restored with 1-piece endodontic crowns (P<.05). Conclusions: In this in vitro study, increasing the number of remaining walls dramatically enhanced the fracture resistance of endodontically treated maxillary first premolars restored with 1-piece endodontic crowns and subjected to thermomechanical fatigue, irrespective of the type of restorative material used.
Quinoa as a functional crop with emphasis on distribution, nutritional composition, and biological effects
(Springer Nature, 2025-08-26) Annan A. Ali; Alaa H. Ali; Marwa A. Nassar; Sohaila M. Elgeilany; Shahira M. Ezzat
Native to the Andes, quinoa (Chenopodium quinoa Willd.) is a pseudocereal that has become well-known around the world for its remarkable nutritional profile and possible health advantages. The distribution, content, nutritional value, and biological activity of quinoa are all examined in this thorough analysis. We look at how it is grown in different parts of the world, including its historical origins in South America and its growing appeal in a variety of climates throughout the globe. According to the composition study, quinoa is a better option than regular grains because of its abundance of excellent quality protein, vital essential amino acids, fiber from food, nutrition, and minerals. Also covered in depth how quinoa can help with nutritional deficits, especially those related to protein and micronutrient consumption. The review also explores the plant’s active compounds, such as phenolic acids, flavonoids, and saponins, which support its antibacterial, anti-inflammatory, and antioxidant qualities. Furthermore, quinoa’s possible therapeutic benefits for long-term conditions including cancer, heart disease, and diabetes are evaluated cautiously. To highlight the significance of quinoa in advancing global food security and improving human health, this study ends by talking about the difficulties in producing grain, such as environmental considerations and environmentally friendly farming techniques. Quinoa is a highly functional food with considerable room for further study and application due to its numerous biological activities.
Does changing the requirements of measurement types and scales used in survey-based research yield different results? An SDG4-aligned quality management experimental study
(Emerald Publishing, 2025-09-07) El-Sayed Abdou Nagy; Heba Mohamed Adel
Purpose: The purpose of this management research experimental study is to assess whether or not changing the requirements for the respondents to answer the same closed- and open-ended questions with different types of measurement scales (multiple choice single or multiple response rating scale, different points of Likert scale and ranking scale) yields different results. It investigates empirically and conceptually deciding the right types of measurement scales for more effective/efficient quality assessment and management process at an SDG4-aligned university, which is internationally validated and nationally accredited, in an Arab country. Design/methodology/approach: The authors have adopted a comprehensive review of the existing interdisciplinary literature of business research methodology, quality management and sustainability in higher education and designed a questionnaire accordingly that assessed the proposed hypotheses. A mixed-methods approach was utilised to capture a profound understanding and analysis of the data gathered through quantitative questionnaires, which were answered via using an experimental approach among two samples of 228 university students, in addition to qualitative interviews for establishing the face/content validity. Findings: The results revealed that changing the requirements for respondents to answer the same closed- and open-ended questions with different types of measurement scales (multiple choice single/multiple response rating scale, different points of Likert scale and ranking scale) yields similar results. Furthermore, the results indicated that students’ answers from the two samples show no significant differences. Thus, deciding the proper requirement of each question type and measurement scale to be used depends on the research purpose/context and its suitability for the researcher in terms of its benefits and challenges that are discussed in this paper according to various factors (e.g. time, accuracy, efficiency, depth and breadth of needed data). Practical implications: Consequently, business management researchers and quality management practitioners in similar sustainable higher education institutions can benefit from the fruitful results of this experimental study on how to decide the right measurement scale for assessing management research variables such as the attitudes towards their institutions, which contributes towards enhancing their service quality provided for various stakeholders and sustaining rigorous quality assurance process in their organisations. Social implications: Higher education institutions in Egypt and universities worldwide can gain insights from the research methodological recommendations of this experimental study on which type of measurement scale to be used while assessing stakeholders’ attitudes towards their universities, which can reinforce their educational quality management process, support their achievement of national/international quality accreditation, contribute towards sustaining the United Nations SDG4 of quality education in their societies and enhance their countries’ worldwide rankings in higher education. Originality/value: This interdisciplinary article contributes to the fields of business research methodology, quality management and sustainability in higher education through comparing theoretically and practically between different types of measurement scales in survey-based research to address and bridge the apparent research-practice methodological gap of deciding the right types of measurement scales for more effective and efficient sustainable quality management in higher education, which supports the attainment of the sustainable development goal (SDG4) for quality education.
Identification, Quantification, and Antioxidant Evaluation of Phenolic Compounds from Colored Opuntia ficus-indica (L.) Roots Using UHPLC-DAD-ESI-MS/MS
(Multidisciplinary Digital Publishing Institute (MDPI), 2025-08-21) Elias Benramdane; Ahmad Mustafa; Nadia Chougui; Nawal Makhloufi; Abderezak Tamendjari; Cassamo U. Mussagy
This study investigates the phenolic composition and antioxidant potential of root extracts from three Opuntia ficus-indica varieties (green, red, and orange) using ultra-high-performance liquid chromatography coupled with diode array detection and electrospray ionization–tandem mass spectrometry (UHPLC-DAD-ESI-MS/MS). Phenolic compounds were extracted with a hydromethanolic solvent and quantified by spectrophotometric assays, while antioxidant activity was assessed through DPPH, ABTS, iron III reduction, hydroxyl radical, and nitric oxide scavenging methods. A total of 26 compounds were identified, including piscidic acid, epicatechin-3-O-gallate, and isovitexin, with several phenolics newly reported for O. ficus-indica roots. The green and red varieties showed the highest phenolic contents (up to 147.82 mg/g extract) and strong antioxidant capacity, particularly in ABTS (IC50 = 29.38 μg/mL) and hydroxyl radical inhibition (>90%). Relative Antioxidant Capacity Index (RACI) analysis confirmed a consistent correlation between phenolic/flavonoid content and antioxidant efficacy. These findings highlight the analytical relevance of UHPLC-DAD-ESI-MS/MS for profiling underutilized plant matrices and support the potential use of O. ficus-indica root extracts as natural sources of bioactive compounds for pharmaceutical and biomedical applications.