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Öğe A Comparative Study of The Phenolic and Flavonoids Contents, and Antioxidant Activity of Ziziphus Mauritiana’s Leaves, Ripe and Unripe Fruit Extracts From Uae(LVIV POLYTECH NATL UNIV, 12, LVIV, LVIV OBLAST 79000, UKRAINE, 2024) Elhaty, Ismail A. M.; Zeyoudi, Sendeyah A.This study evaluates the antioxidant properties of leaves, unripe and ripe fruits of Ziziphus mauritiana from the UAE. Phenolic compounds show a strong correlation with antioxidant activity, with the leaves exhibiting the highest efficiency. The results suggest that Ziziphus mauritiana leaves are a promising source of natural antioxidants with potential therapeutic applicationsÖğe Crisis management and the impact of pandemics on religious tourism(Dublin Institute of Technology, 2020) Mosier, William; Elhadary, Tariq; Elhaty, Ismail A. M.; Safaei, MehdiThe spread of the novel coronavirus (COVID-19) has caused a worldwide shockwave of fear and much misinformation leaving chaos in its wake. Holy shrines and other religious sites have a special place in the hearts and minds of many people. For example, the mosques in Makkah and Medina, Saudi Arabia typically accommodate over one hundred thousand Muslims daily. Due to the spread of COVID-19, both mosques were forced to shut their doors to pilgrims for health and safety reasons. This situation has saddened millions of Muslims all over the globe. The same situation applies to Qom City in Iran, Bethlehem on the West Bank, and the Vatican City. Precautionary actions have caused religious shrines to remain closed until further notice. The methodology used in this study is descriptive and multi-disciplinary. In this paper, the issue of COVID-19 is addressed from the perspective of medical science, chemistry, management science, economics, and religious sociology. This paper sheds light on the history of the virus, its effect on the global economy and crisis-management measures involving sacred places. The paper investigates how faith can expedite the recovery strategies of religious tourism, and consequently the tourism sector will follow suit. The paper elaborates on the potential impact of the pandemic on the future of religious tourism and how the psychological impact of closing Holy Shrines to pilgrims can be a strong driving force for a speedy recovery once the pandemic trickles off. © International Journal of Religious Tourism and PilgrimageÖğe Diagnosis of Oral Squamous Cell Carcinoma Using Deep Neural Networks and Binary Particle Swarm Optimization on Histopathological Images: An AIoMT Approach(HINDAWI LTD, ADAM HOUSE, 3RD FLR, 1 FITZROY SQ, LONDON W1T 5HF, ENGLAND, 2022) Deif, Mohanad A.; Attar, Hani; Amer, Ayman; Elhaty, Ismail A. M.; Khosravi, Mohammad R.; Solyman, Ahmad Amin AhmadOverall prediction of oral cavity squamous cell carcinoma (OCSCC) remains inadequate, as more than half of patients with oral cavity cancer are detected at later stages. It is generally accepted that the differential diagnosis of OCSCC is usually difficult and requires expertise and experience. Diagnosis from biopsy tissue is a complex process, and it is slow, costly, and prone to human error. To overcome these problems, a computer-aided diagnosis (CAD) approach was proposed in this work. A dataset comprising two categories, normal epithelium of the oral cavity (NEOR) and squamous cell carcinoma of the oral cavity (OSCC), was used. Feature extraction was performed from this dataset using four deep learning (DL) models (VGG16, AlexNet, ResNet50, and Inception V3) to realize artificial intelligence of medial things (AIoMT). Binary Particle Swarm Optimization (BPSO) was used to select the best features. The effects of Reinhard stain normalization on performance were also investigated. After the best features were extracted and selected, they were classified using the XGBoost. The best classification accuracy of 96.3% was obtained when using Inception V3 with BPSO. This approach significantly contributes to improving the diagnostic efficiency of OCSCC patients using histopathological images while reducing diagnostic costs.Öğe Effect of Tween 80 on The Stability and Conformatıon of Telomeric G-Quadruplex Dna(Lviv Polytech Natl Univ, 2023) Elhaty, Ismail A. M.G-quadruplex DNA is formed in telomer. It inhibits telomerase enzyme which is found active in more than 85 % of cancer cells. In this work, the effect of Tween 80 on telomeric G-quadruplex DNA, AGGG(TTAGGG)3 was studied using circular dichroism spectroscopic technique. The obtained results showed that using Tween 80 with telomeric quadruplex is safe up to less than 1.0 %.Öğe In-situ, facile and green preparation of nanoscale silver supported on activated carbon: Disinfection properties and removal of inorganic DBPs from drinking water(Elsevier B.V., 2022) Soliman, Ahmed M.; Elshorbagy, Walid; Maraqa, Munjed A.; Al-Issai, Laila M.; El Sheikh, Ehab S.; Elhaty, Ismail A. M.; Ayesh, Ahmad I.Activated carbon (AC) was prepared from date palm leaves by phosphoric acid activation. The factors affecting the carbon percentage yield such as phosphoric acid concentration, synthesis temperature, and heating time were studied. The prepared AC was studied by chemical analysis of the functional groups on its surface. The prepared AC was decorated with silver nanoparticles (Ag NPs) by in-situ reduction of adsorbed silver ion. Silver ions were introduced on carbon surface by adsorption and ion exchange. Characterization of the prepared AC was performed using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), infra-red spectroscopy (IR), and thermogravimetric analysis (TGA). Results showed that silver ions are impregnated and reduced to Ago NPs with sizes between 30 and 50 nm on the surface of AC. The disinfection properties of Ag-loaded AC were tested for Escherichia Coli and Staphylococci bacteria. The removal of some inorganic disinfection by products (DBPs) including iodate, chlorate, chlorite, and bromate were tested. The results showed that the prepared AC-Ag is effective for antibacterial disinfection and inorganic anions removal applications. © 2021Öğe Interaction between GW2974 and telomeric G-quadruplex DNA: a possible anticancer mechanism(Springer Int Publ Ag, 2021) Elhaty, Ismail A. M.Human telomere consists of tandem repeats of guanines; thus, it can form an intramolecular G-quadruplex structure, which can inhibit the telomerase enzyme that is found active in more than 85% of cancer cells. The present work investigated the interactions of GW2974, a quinazoline derivative with telomeric G-quadruplex AG(3)(TTAGGG)(3.) GW2974 had shown a good affinity to G-quadruplex DNA with a binding constant of 2.41 x 10(6) M-1 and melting temperature shift Delta Tm of 9.9 degrees C. Increasing the GW2974 ratio with DNA up to five times showed an inverse effect on G-quadruplex DNA stability. The stoichiometric ratio between GW2974 and TelQ (per strand) was 2:1. Results obtained from absorption, fluorescence, and CD spectroscopic techniques indicated that GW2974 interacted with G-quadruplex through different binding modes. GW2974 showed good specificity to quadruplex over duplex DNA by 4.71-fold. These results indicated that stabilizing of telomeric G-quadruplex inhibited telomerase enzyme, which could be a potential anticancer mechanism of GW2974.Öğe New thiophene derivatives: chemoselective synthesis, antitumor effectiveness, structural characterization, DFT calculations, Hirshfeld surface, and Fukui function analysis(BMC, CAMPUS, 4 CRINAN ST, LONDON N1 9XW, ENGLAND, 2024) Bin Muhsinah, Abdullatif; Alharbi, Mohammed M.; Kheder, Nabila Abdelshafy; Soliman, Saied M.; Ghabbour, Hazem A.; Mahmoud, Naglaa S.; Elhaty, Ismail A. M.; Mabkhot, Yahia N.In this study, the chemoselective synthesis of two new thiophene derivatives is presented. The structure of newly synthesized thiophenes derivatives; ethyl 4-acetyl-3-phenyl-5-(phenylamino)thiophene-2-carboxylate (5) and ethyl (E)-4-(3-(dimethylamino)acryloyl)-3-phenyl-5-(phenylamino)thiophene-2-carboxylate (8) were established using different FTIR and NMR spectral analyses. Compound 8 was isolated as single crystal and its 3D structure was determined using X-ray crystallographic analysis. Possible intermolecular interactions that control the molecular packing of 8 were elucidated using Hirshfeld topology analysis. The O…H (13.7%), H…H (55.3%) and C…C (2.3%) intermolecular interactions are the most significant. Fukui functions showed that C4 in thiophene 5 and C3 in thiophene 8 are the most reactive atoms for nucleophilic attack, while N9 in thiophene 5 and C1 in thiophene 8 are the most reactive atoms for electrophilic attack. Antitumor activity of thiophene 5 was assessed and the results showed higher activity against HepG-2 (7.46 µg/mL) compared to the HCT 116 (12.60 µg/mL) cell line.Öğe Photocatalytic removal of nitrate from water using activated carbon-loaded with bimetallic Pd-Ag nanoparticles under natural solar radiation(ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND, 2022) Soliman, Ahmed M.; Alshamsi, Dalal; Murad, Ahmed A.; Aldahan, Ala; Ali, Ismail M.; Ayesh, Ahmad I.; Elhaty, Ismail A. M.The increase of nitrate contamination of surface and groundwater has raised a concern, because of its impact on both environment and human health. In this study, photocatalysis for nitrate treatment in water was conducted using activated carbon prepared from date palm stone decorated with single and bimetals nanoparticles using solar radiation. The prepared catalyst was characterized by XPS, SEM, EDX, TGA, and surface area analyzer instruments. The photocatalytic effect of the prepared catalyst was studied using nitrate solution and acid scavengers with different concentrations. Significant photocatalytic activity was observed for activated carbon when modified with Pd–Ag. The obtained results showed that the conversion of nitrate takes place mainly through nitrogen gas (N2) rather than nitrite (NO2 – ) or ammonium (NH4 +). Formic acid as a hole scavenger with 0.05 M shows the maximum conversion for nitrate. The prepared photocatalyst shows stability for five cycles of nitrate ion reduction. Moreover, the results showed that the prepared catalyst could be applied for the removal of nitrate from groundwater and river water samples.Öğe Potential key challenges for terahertz communication systems(Institute of Advanced Engineering and Science, 2021) Solyman, Ahmad A. A.; Elhaty, Ismail A. M.The vision of 6G communications is an improved performance of the data rate and latency limitations and permit ubiquitous connectivity. In addition, 6G communications will adopt a novel strategy. Terahertz (THz) waves will characterize 6G networks, due to 6G will integrate terrestrial wireless mobile communication, geostationary and medium and low orbit satellite communication and short distance direct communication technologies, as well as integrate communication, computing, and navigation. This study discusses the key challenges of THz waves, including path losses which is considered the main challenge; transceiver architectures and THz signal generators; environment of THz with network architecture and 3D communications; finally, Safety and health issues. © 2021 Institute of Advanced Engineering and Science. All rights reserved.Öğe Role of Drone Technology Helping in Alleviating the COVID-19 Pandemic(MDPI, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND, 2022) Mohsan, Syed Agha Hassnain; Zahra, Qurat ul Ain; Khan, Muhammad Asghar; Alsharif, Mohammed H.; Elhaty, Ismail A. M.; Jahid, AbuThe COVID-19 pandemic, caused by a new coronavirus, has affected economic and social standards as governments and healthcare regulatory agencies throughout the world expressed worry and explored harsh preventative measures to counteract the disease’s spread and intensity. Several academics and experts are primarily concerned with halting the continuous spread of the unique virus. Social separation, the closing of borders, the avoidance of big gatherings, contactless transit, and quarantine are important methods. Multiple nations employ autonomous, digital, wireless, and other promising technologies to tackle this coronary pneumonia. This research examines a number of potential technologies, including unmanned aerial vehicles (UAVs), artificial intelligence (AI), blockchain, deep learning (DL), the Internet of Things (IoT), edge computing, and virtual reality (VR), in an effort to mitigate the danger of COVID-19. Due to their ability to transport food and medical supplies to a specific location, UAVs are currently being utilized as an innovative method to combat this illness. This research intends to examine the possibilities of UAVs in the context of the COVID-19 pandemic from several angles. UAVs offer intriguing options for delivering medical supplies, spraying disinfectants, broadcasting communications, conducting surveillance, inspecting, and screening patients for infection. This article examines the use of drones in healthcare as well as the advantages and disadvantages of strict adoption. Finally, challenges, opportunities, and future work are discussed to assist in adopting drone technology to tackle COVID-19-like diseases.Öğe Synthesis and Antibacterial Activity of Rhodanine-Based Azo Dyes and Their Use as Spectrophotometric Chemosensor for Fe3+ Ions(MDPI, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND, 2020) Akram, Dana; Elhaty, Ismail A. M.; AlNeyadi, Shaikha S.This research includes the design and synthesis of new derivatives for rhodanine azo compounds (4a–c) containing a naphthalene ring. Physiochemical properties of the synthesized compounds were determined by their melting points, FTIR, 1H-NMR, 13C-NMR, and elemental analysis spectroscopic techniques. The biological activities of the newly prepared azo rhodanine compounds were evaluated against some pathogenic bacteria using three different bacterial species including (Escherichia coli., Pseudomonas aeruginosa, Staphylococcus aureus) and compared with amoxicillin as a reference drug. The results showed that our compounds have moderate-to-good vital activity against the mentioned pathogenic bacteria. The selectivity and sensitivity of the newly prepared rhodanine azo compounds with transition metals Co2+, Cu2+, Zn2+, Ni2+, and Fe3+ were studied using UV–vis and fluorescence spectroscopy techniques. Among the synthesized azos, azo 4c showed affinity toward Fe3+ ions with an association constant of 4.63 × 108 M?1 . Furthermore, this azo showed high sensitivity toward Fe3+ ions with detection limits of 5.14 µM. The molar ratio and Benesi–Hildebrand methods confirmed the formation of complexes between azo 4c and Fe3+ with 1:2 binding stoichiometry. Therefore, azo 4c showed excellent potential for developing efficient Fe3+ chemosensors.Öğe Synthesis and spectroscopic characterization of rhodanine azo dyes as selective chemosensors for detection of iron(III)(Elsevier B.V., 2020) Akram, Dana; Elhaty, Ismail A. M.; AlNeyadi, Shaikha S.As the presence of (Fe3+) is strongly associated with many environmental and biomedical analysis, effective sensing methods are of great importance for monitoring Fe3+ levels in these systems. In this study, we synthesized a new rhodanine-based azo dye (4d) and compared it with compound (4c) which showed the best sensitivity and selectivity among our previously reported compounds. The interaction behaviors with Fe3+ ions using UV/vis, fluorescence, IR, and NMR spectrometric techniques were investigated. The spectroscopic characterization revealed that azo 4d showed high affinity towards Fe3+ ions with association constant of 5.35 × 108 M?1. Furthermore, it showed high sensitivity towards Fe3+ ions with detection limit of 7.05 µM. These results are almost similar to that of azo 4c. The molar ratio and Benesi–Hildebrand methods confirmed the formation of complexes between azo 4c,d and Fe3+ with 1:2 binding stoichiometry. NMR and IR analyses confirmed the coordination between Fe3+ and the nitrogen atom of the NH (hydrazone) group and the oxygen atom of the carbonyl (C=O) group. Owing to its good affinity and high sensitivity for Fe3+, azo 4d showed excellent potential for developing efficient Fe3+ chemosensors. © 2020Öğe Teaching Chemistry in English in Turkish Unıversities: Challenges and Obstacles(Natl Technical Univ Ukraine Kyiv Polytechnic Inst, Fac Linguistics, 2023) Elhadary, Tariq; Elhaty, Ismail A. M.No matter if they are in high school or college, Turkish students have particular challenges when trying to understand chemistry lectures delivered in English. The purpose of this study is to evaluate the difficulties Turkish students have when studying chemistry in English. A survey was administered to Turkish students at a Turkish University, nutrition and dietetics major in order to obtain relevant information. The results showed that 24.6% of students have difficulties learning chemistry in English, and 52.3% of the students are reluctant to give presentations in the chemistry class due to their lack of confidence in the English language. The results showed that the areas of weakness in the English language were conversational skills (78.5%), grammar (75.4%), vocabulary (75.4%), listening (72.2%), and reading (38.5%). Therefore, a considerable percentage of these students (48.6%) take their lecture notes in Turkish, and an overwhelming majority of them (46.2%) think that adding English terminology to textbooks alongside Turkish would help the problem. According to the research, it is possible to increase students' English skills and therefore their understanding of chemistry by employing various teaching strategies. To address communication hurdles in chemistry classes, the study heavily draws on both the Communicative and Natural Approaches.
