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2,078 results on '"Alqahtani, Mohammed"'

8. Psychometric Properties of the Arabic Vanderbilt Children's ADHD Diagnostic Rating Scale (VADRS-A) in a Saudi Population Sample

Author

Alqahtani Mohammed M. J., Al Saud Nouf Mohammed, Alsharef Nawal Mohammed, Alsalhi Saleh Mohammed, Al-Hifthy Elham H., AlHadi Ahmad N., Ad-Dab’bagh Yasser, Alenazi Fawwaz Abdulrazaq, Alotaibi Barakat M., Alsaeed Sultan Mahmoud, Arnout Boshra A., ALQasem Latifah, Alhossein Abdulkarim, Alqahtani Yasser Jubran, AlGhamdi Samirah A., Alrahili Nader, Varnham Jeremy, and Asiri Saeed Abdulwahab

Subjects
adhd, children, vadprs, vadtrs, parent, teacher, saudi arabia, Psychiatry, RC435-571, Psychology, BF1-990
Abstract

This study aimed to utilize Principal Component Analysis (PCA) and Confirmatory Factor Analysis (CFA) to investigate the constructive validity of the Arabic translation of the Vanderbilt Attention Deficit/Hyperactive Disorder (ADHD) Diagnostic Scale (VADRS-A) using its two versions, the Arabic Vanderbilt ADHD Diagnostic Parent Rating Scale (VADPRS-A) and the Arabic Vanderbilt ADHD Diagnostic Teacher Rating Scale (VADTRS-A).

Published
2024
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29. Bilateral posterior crystalline lens dislocations in an otherwise healthy child

Author

AlShehri, Omar A., Almarzouki, Hashem, Alharbi, Badr A., Alqahtani, Mohammed, and Allam, Khaled

Subjects
bilateral lens dislocation, ectopic lentis, lens displacement, Ophthalmology, RE1-994
Abstract

Introduction: Ectopia lentis is defined as a crystalline lens displacement, either partially or completely, due to zonular abnormalities. It can be a result of trauma, hereditary ocular disease, or part of systemic diseases, like Marfan syndrome and homocystinuria.Case description: We report a case of a medically free 16-year-old girl, who was referred to our hospital complaining of poor vision and a squint in both eyes since childhood. Her history included a traffic accident when she was one-year-old. She was previously diagnosed with alternating esotropia, which was treated with glasses, alternating patching, and bilateral Botox injections. On examination, she had a visual acuity of 6/7.5 with correction in the right eye and 6/6 with correction in the left eye. She had an esotropia of 60 prism diopters, which was partially corrected to 40 prism diopters for near and distance vision. Fundus examination showed myopic changes in each eye and dislocated lenses in the posterior pole at 6 o’clock. Our case was stable, so we used conservative management with contact lenses.Conclusion: Bilateral posterior lens dislocation is very rare. A proper examination is important and early diagnosis can prevent serious complications, such as retinal detachment or pupillary block glaucoma.

Published
2017
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30. Green synthesis of copper oxide nanoparticles using genus Inula and evaluation of biological therapeutics and environmental applications

Author

Alangari Abdulaziz, Aboul-Soud Mourad A. M., Alqahtani Mohammed S., Shahid Mudassar, Syed Rabbani, Lakshmipathy R., Modigunta Jeevan Kumar Reddy, Jaiswal Harshita, and Verma Meenakshi

Subjects
inula, cuo nanoparticles, antimicrobial, anticancer, antioxidant, adsorbent, Technology, Chemical technology, TP1-1185, Physical and theoretical chemistry, QD450-801
Published
2024
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33. Numerical study of blood-based MHD tangent hyperbolic hybrid nanofluid flow over a permeable stretching sheet with variable thermal conductivity and cross-diffusion

Author

Senthilvadivu Karuppiah, Loganathan Karuppusamy, Abbas Mohamed, and Alqahtani Mohammed S.

Subjects
tangent hyperbolic fluid, cross-diffusion, radiation, magnetohydrodynamic, stretching surface, Physics, QC1-999
Abstract

Modern heat transport processes such as fuel cells, hybrid engines, microelectronics, refrigerators, heat exchangers, grinding, coolers, machining, and pharmaceutical operations may benefit from the unique properties of nanoliquids. By considering Al2O3{{\rm{Al}}}_{2}{{\rm{O}}}_{3} nanoparticles as a solo model and Al2O3–Cu{{\rm{Al}}}_{2}{{\rm{O}}}_{3}{\rm{\mbox{--}}}{\rm{Cu}} as hybrid nanocomposites in a hyperbolic tangent fluid, numerical simulations for heat and mass transfer have been established. To compare the thermal acts of the nanofluid and hybrid nanofluid, bvp4c computes the solution for the created mathematical equations with the help of MATLAB software. The impacts of thermal radiation, such as altering thermal conductivity and cross-diffusion, as well as flow and thermal facts, including a stretchy surface with hydromagnetic, and Joule heating, were also included. Furthermore, the hybrid nanofluid generates heat faster than a nanofluid. The temperature and concentration profiles increase with the Dufour and the Soret numbers, respectively. The upsurge permeability and Weissenberg parameter decline to the velocity. An upsurge variable of the thermal conductivity grows to the temperature profile. Compared to the nanofluids, the hybrid nanofluids have higher thermal efficiency, making them a more effective working fluid. The magnetic field strength significantly reduces the movement and has a striking effect on the width of the momentum boundary layer.

Published
2024
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34. Green synthesis of FeO nanoparticles from coffee and its application for antibacterial, antifungal, and anti-oxidation activity

Author

Alangari Abdulaziz, Alqahtani Mohammed S., Shahid Mudassar, Syed Rabbani, Goel Mukesh, Lakshmipathy R., and Kaur Kirtanjot

Subjects
anti-microbial, anti-oxidation, coffee, iron oxide nanoparticles, green synthesis, Chemistry, QD1-999
Abstract

This study presents a sustainable method for producing iron oxide nanoparticles (FeO NPs) using aqueous extracts from coffee seeds. Characterization through X-ray diffraction (XRD), scanning electron microscopy, and transmission electron microscopy (TEM) revealed non-spherical NPs ranging from 30 to 50 nm. The XRD analysis confirmed that the face-centred cubic structure and the Debye–Scherrer’s crystalline size support the FeO particle size confirmed from TEM. The synthesized NPs demonstrated significant antimicrobial activity against Escherichia coli and Staphylococcus aureus, as well as antifungal activity against Aspergillus niger. Additionally, they exhibited potent antioxidant properties, effectively inhibiting DPPH, α-amylase, and α-glucosidase compared to acarbose and coffee extract. The findings suggest that these FeO NPs hold promise as antimicrobial, antioxidant, antifungal, and potentially antidiabetic agents.

Published
2024
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