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Cutting-Edge Approach To Targeted Therapy: Repositioning Of Old Drugs In Combination With Standard Clinical Chemotherapeutics Potentiates A Propitious Novel Targeted Therapy For Human Pancreatic Cancer, Rashelle Aldbai, Leili Baghaie, David A. Bunsick, Emilyn Aucoin, Yunfan Li, Daniella Ghokasian, Myron R.Szewczuk Apr 2025

Cutting-Edge Approach To Targeted Therapy: Repositioning Of Old Drugs In Combination With Standard Clinical Chemotherapeutics Potentiates A Propitious Novel Targeted Therapy For Human Pancreatic Cancer, Rashelle Aldbai, Leili Baghaie, David A. Bunsick, Emilyn Aucoin, Yunfan Li, Daniella Ghokasian, Myron R.Szewczuk

Sultan Qaboos University Journal For Science

Metastatic pancreatic cancer leads to a fatal outcome, with a median progression-free survival of approximately six months when utilizing the most successful combination of chemotherapeutic regimens. When drug resistance develops, it facilitates an increase in primary tumor growth and new and growing metastases. Patients inevitably and quickly succumb to their disease and die. Notably, chemotherapy has an unintended impact on the development of drug resistance through the enhancement of EMT development and the enrichment of cancer stem cells (CSC). Recent report discovered that neuraminidase-1 (Neu-1) regulates EMT induction, angiogenesis, and cellular proliferation by the activation of several receptor tyrosine kinases. …

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Preventive Effects Of Dill Oil On Potassium Bromated-Induced Oxidative Dna Damage In Garlic Root Tips, Hoda Khatab, S:20:"Associated Professor", } N/A, Samia Eissa, Nagat S. Elhaddad Apr 2025

Preventive Effects Of Dill Oil On Potassium Bromated-Induced Oxidative Dna Damage In Garlic Root Tips, Hoda Khatab, S:20:"Associated Professor", } N/A, Samia Eissa, Nagat S. Elhaddad

Sultan Qaboos University Journal For Science

In this study, the potential antimutagenic/cytoprotective effect of the oil extract (2.5µg/ml) from Anethum graveolens L. (Dill) on oxidative DNA damage was tested. The experiments were carried out to inhibit mutagenicity induced by potassium bromated (KBrO3-9g/l) in Allium assay using mitotic activities and nuclear DNA contents. Result showed a clear reduction in radical length in all KBrO3-treated groups compared to control plants. Mitotic activity, measured by mitotic index (MI) and mitotic stages, were significantly decreased in meristematic cells after KBrO3 application, The results showed that mitotic index (MI) was decreased to reach about 0.8 at 24 hrs compared with 23.9% …

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Biosystematic Studies On The Genus Crepis L. (Asteraceae: Cichorieae) In Egypt, Mona Hassan, Aamaa Olwey, Mostafa Aboulela Apr 2025

Biosystematic Studies On The Genus Crepis L. (Asteraceae: Cichorieae) In Egypt, Mona Hassan, Aamaa Olwey, Mostafa Aboulela

Sultan Qaboos University Journal For Science

The taxonomy of the genus Crepis L. in Egypt is critically discussed. The genus is represented in Egypt by seven species with four infra-specific taxa. One new record (C. aspera var. inermis (Cass.) Boiss.) is reported here for the first time for the flora of Egypt. The macro- and micro-morphological characteristics of the studied Crepis taxa, including the capitula, phyllaries, achenes, trichomes, and stomata, were investigated. Multivariate (cluster and PCA) analyses based on macro- and micro-morphological characteristics elucidate the phenetic relationships among the investigated taxa at the sectional level. A key, full descriptions, an updated nomenclature, and a revised type …

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The Continued Presence Of Antibiotic-Resistant Bacteria And Heavy Metals At One Of The World’S Most Important Green Turtles’ Nesting Location, Ras Al-Jinz Reserve, Oman, Al-Musharafi S.K, Al-Amrani S.A., Mahmoud I.Y, Al-Bahry S.N, Leduc A.O.H.C Apr 2025

The Continued Presence Of Antibiotic-Resistant Bacteria And Heavy Metals At One Of The World’S Most Important Green Turtles’ Nesting Location, Ras Al-Jinz Reserve, Oman, Al-Musharafi S.K, Al-Amrani S.A., Mahmoud I.Y, Al-Bahry S.N, Leduc A.O.H.C

Sultan Qaboos University Journal For Science

Environmental contamination of marine habitats is a global concern, especially in areas that are crucial for endangered species’ life cycles. To gain a comprehensive understanding of environmental contamination, analyzing various biotic and abiotic components of ecosystems is necessary. Situated in the Arabian Peninsula, Ras al-Jinz Reserve serves as an invaluable nesting site for green sea turtles (Chelonia mydas). There, the prevalence of antibiotic-resistant microbial strains and heavy metals was assessed by collecting samples from diverse components of this ecosystem, including sand from turtle nests, dead turtle hatchlings, fresh turtle eggs, oviductal fluids from nestling turtles, turtle carapace smears, live crabs, …

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Identification Of Two Species Of The Family Sparidae For Edna Sequences Using A Representative 16srrna Reference Library For Omani Fish, Aliya Alansari, Wahida Alamri Apr 2025

Identification Of Two Species Of The Family Sparidae For Edna Sequences Using A Representative 16srrna Reference Library For Omani Fish, Aliya Alansari, Wahida Alamri

Sultan Qaboos University Journal For Science

Identification of fish species accurately is required to support efforts for conserving fishery biodiversity assessment and sustainable management. Recently, environmental DNA (eDNA) was suggested for regular monitoring of species for effective management of biodiversity. In Oman, molecular reference library representing fish species from the Omani coastline can support such potential approaches. In this communication, we used a local mtDNA-16SrRNA reference library representing Sparidae fish species from the Omani coastlines to identify two Sparidae eDNA sequences (zotu24 and zotu85, from Muscat and Dhofar, respectively) from Acanthopagrus and Diplodus genera reported by a recent eDNA study from Oman. The two species are …

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The Class I Histone Deacetylase Inhibitor As A Potent Therapeutic Target For Treating Glioblastoma And Mocetinostat As A Novel Inhibitor In The Induction Death Of Cancer Cells, Firas Hameed Khathayer Apr 2025

The Class I Histone Deacetylase Inhibitor As A Potent Therapeutic Target For Treating Glioblastoma And Mocetinostat As A Novel Inhibitor In The Induction Death Of Cancer Cells, Firas Hameed Khathayer

Sultan Qaboos University Journal For Science

Epigenetic abnormality is one of the hallmarks of glioblastoma cancer cells. Histone deacetylase (HDAC) modification has a crucial role in epigenetic abnormality, which results in the initiation and progression of glioblastoma cancer cells. The selective HDAC inhibitors are well-known epigenetic regulators and promising anti-cancer agents that target specific HDAC enzymes and inhibit the proliferation of many cancer cells. Selective HDAC inhibitors isoform provides a high efficacy as chemotherapy in inhibiting cancer confirmation compared to non-selective HDAC inhibitors. Additionally, selective HDAC inhibitors suppress Class -I HDAC1, HDAC2, HDAC3, and HDAC11. HDAC class I inhibitors induce apoptosis, differentiation, autophagic death cells, and …

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Genotoxic Response And Histological Alterations In Rat Lungs Exposed To Gasoline Generator Exhaust, Akinpelu Moronkeji, Frederick O.Akinbo Apr 2025

Genotoxic Response And Histological Alterations In Rat Lungs Exposed To Gasoline Generator Exhaust, Akinpelu Moronkeji, Frederick O.Akinbo

Sultan Qaboos University Journal For Science

The epileptic power supply in Nigeria has caused a surge in the production of energy from other sources, including gasoline generator sets. The air pollution caused by the exhaust from these engines has been implicated in a variety of metabolic disorders and diseases, including cancer. This study aims at understanding the genotoxic and histopathological effects of gasoline generator exhaust exposure on the DNA and lungs of adult male wistar rats. Forty- eight (48) adult wistar rats were divided into four categories, each with 12 rats. The control rats were not exposed to gasoline generator exhaust while the test groups were …

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Evaluation Of Hospital Wastewater Treatment Using Sewage Treatment Plant For Heavy Metals, Radionuclides, And Some Pharmaceuticals: A Case Study, Amira M.A. Al-Maqrashia, El-Said I. El-Shafey, Haider A. Al-Lawati, Abbasher M. Gismelseed, Bashayer B. Al-Mamari Apr 2025

Evaluation Of Hospital Wastewater Treatment Using Sewage Treatment Plant For Heavy Metals, Radionuclides, And Some Pharmaceuticals: A Case Study, Amira M.A. Al-Maqrashia, El-Said I. El-Shafey, Haider A. Al-Lawati, Abbasher M. Gismelseed, Bashayer B. Al-Mamari

Sultan Qaboos University Journal For Science

This is the first study in Oman to evaluate the efficiency of a sewage treatment plant (STP) for hospital wastewater (HWW) treatment for heavy metals, radionuclides, and some selected pharmaceuticals. A sewage treatment plant (STP) at Sultan Qaboos University (SQU) receives HWW, from Sultan Qaboos University Hospital (SQUH), and municipal wastewater from non-medical facilities at SQU. Representative samples of HWW (before mixing with municipal wastewater at STP), STP-treated wastewater (TWW), and STP mixing sludge, were collected and analyzed. A method for analyzing pharmaceuticals including metformin, atenolol, chlorpheniramine, triprolidine, diphenhydramine, and citalopram was developed and validated using LC-MS-MS. HWW and TWW …

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Production And Optimization Of Extracellular Α-Amylase From Halophilic Bacteria Cytobacillus Oceanisediminis Isolated From Wadi-El-Natrun, Egypt, Nada A. Hashem, Naeima M.H. Yousef Apr 2025

Production And Optimization Of Extracellular Α-Amylase From Halophilic Bacteria Cytobacillus Oceanisediminis Isolated From Wadi-El-Natrun, Egypt, Nada A. Hashem, Naeima M.H. Yousef

Sultan Qaboos University Journal For Science

The current study aimed to maximize α-amylase enzyme production by halophilic bacteria Cytobacillus oceanisediminis isolated from soil of Wadi-El-Natrun, Egypt. The results showed that of 21 halophilic bacterial isolates recovered from saline soil samples, eight isolates were high amylase producers. Interestingly, the bacterial isolate AHB6 exhibited the highest extracellular amylase production and was selected for further studies. This isolate was molecularly identified based on the 16srRNA gene sequencing as Cytobacillus oceanisediminis and has the accession number OM759999. The optimum temperature for α-amylase enzyme was 45 °C and exhibited thermostability at 45 °C for 1 h and retained more than 80% …

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The Intended Blessed Tree In The Quran - Is It Olive Tree Or Palm Oil Tree?, Mostafa Koutb Apr 2025

The Intended Blessed Tree In The Quran - Is It Olive Tree Or Palm Oil Tree?, Mostafa Koutb

Sultan Qaboos University Journal For Science

This article aims to provide an alternative scientific interpretation for verse 35 in Surat An-Nur. This verse addresses the very famous simile in the Quran which describes the light of Allah. In this verse Allah mentioned that ꞌAllah (is the) light (of) the heavens and the earth. (The) example (of) His Light (is) like a niche in it (is) a lamp; the lamp (is) in a glass, the glass as if it were a star brilliant (which) is lit from a tree blessed - an olive, not (of the) east and not (of the) west, would almost its oil glow, …

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Impact Of Climate Change On Rare Species In Arid Environments, Hamada Ali, S:24:"Sultan Qaboos University", } N/A Apr 2025

Impact Of Climate Change On Rare Species In Arid Environments, Hamada Ali, S:24:"Sultan Qaboos University", } N/A

Sultan Qaboos University Journal For Science

Climate Change discusses the long-term metrological conditions and patterns. Besides nature, human development has drastically increased the chances of climate change by burning fossil fuels, including oil, gas, and coal. That resulted in turbulence among humans and plants, and animals. This vulnerability or changing climate dynamics has impacted the plants that are the earth's primary source of life. Egypt is one of the countries where the temperature has risen in the past decades due to climate change. In this country, the plants are affected by the vulnerability of this dynamic change of climate, especially the rare plant species. One of …

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An Efficient Sensor Based On Anodic Activation Of Graphene Oxide For Sensitive And Selective Determination Of Dopamine In Blood Serum, Emad Aldeen Khudaish, Lamiya Al Ghafri, Nusiba Al Hatmi, Salah Joudi Apr 2025

An Efficient Sensor Based On Anodic Activation Of Graphene Oxide For Sensitive And Selective Determination Of Dopamine In Blood Serum, Emad Aldeen Khudaish, Lamiya Al Ghafri, Nusiba Al Hatmi, Salah Joudi

Sultan Qaboos University Journal For Science

A native graphene oxide (NGO) prepared by Hummers modified method was used as the template materials for the fabrication of electrochemically oxidative graphene oxide (OGO) onto a glassy carbon electrode (GCE). The fabrication of OGO-GCE persuaded via anodic reversible potentiodynamic of NGO base surface materials that increases the concentration of oxygen functionalities. The development of a new aldehyde/alcoholic functional group on OGO-GCE characterized by XPS analysis is a marked signal for oxygen richness surface which provoked on the cost of sp2 hybridized function. The EIS data underline that OGO-GCE promote the electron transfer kinetics much more than NGO-GCE by 9 …

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Preparation And Characterization Of Iron Oxide Nano-Adsorbent By Enteromorpha Flexuosa Algae Obtained From Yanbu Red Sea, Saudi Arabia, Prof. Imran Ali, Alaa Elmi, Rafat Afifi Khattab, Omar M.L. Alharbi, Gunel Imanova Apr 2025

Preparation And Characterization Of Iron Oxide Nano-Adsorbent By Enteromorpha Flexuosa Algae Obtained From Yanbu Red Sea, Saudi Arabia, Prof. Imran Ali, Alaa Elmi, Rafat Afifi Khattab, Omar M.L. Alharbi, Gunel Imanova

Sultan Qaboos University Journal For Science

Water contamination caused by toxic cadmium metal ions is a worldwide problem. There is a need to explore new methods of cadmium removal from water. The green algae Enteromorpha flexuosa, obtained from the Red Sea in Yanbu, Saudi Arabia, was used to prepare iron nanoparticles. TEM, FT-IR, XRD, and SEM techniques were used to characterize the prepared nanoparticles. The prepared nanoparticle's surface was rough, with nanoparticle sizes ranging from 10 to 50 nm. The developed nanoparticles were used to adsorb cadmium ions from water in batch mode. With a 25.0 µg/L concentration, a temperature of 25˚C, 7.0 pH, 60 minutes …

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Knowledge And Attitude Towards Covid-19 And Associated Mental Health Status Among Students Of Sultan Qaboos University, Oman, M Mazharul Islam, Ronald Wesonga, Iman Al Hasani, Afra Al Manei Apr 2025

Knowledge And Attitude Towards Covid-19 And Associated Mental Health Status Among Students Of Sultan Qaboos University, Oman, M Mazharul Islam, Ronald Wesonga, Iman Al Hasani, Afra Al Manei

Sultan Qaboos University Journal For Science

This study examined the COVID-19-related knowledge and attitude towards COVID-19 and associated mental health status during COVID-19 among the students of Sultan Qaboos University in Oman using an online cross-sectional survey conducted from 26 March - 25 April 2021 among the students of Sultan Qaboos University (SQU). Both descriptive and inferential statistical techniques, including multiple logistic regression analysis, were used for data analysis. Of the 1,951 respondents, 60% were females with a mean age of 22 years. About 13% were tested COVID-19 positive and 3.6% were tested positive. Overall, students demonstrated a high level (81%) of knowledge and a positive …

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Toxicological Evaluation Of The Leaves Of Mangifera Indica L. (Mango) On Albino Rats (Rattus Norvegicus), Tajudeen, O.Y, Titilola F. Salisu, Esther O. Oladele, 4department Of Animal And Environmental Biology, University Of Uyo, Akwa Ibom State, Nigeria, Clement Yaro, Nura Iliyazu, Adam Tukur, Abdulrazaq Izuafa, Muhammad A. Yari Apr 2025

Toxicological Evaluation Of The Leaves Of Mangifera Indica L. (Mango) On Albino Rats (Rattus Norvegicus), Tajudeen, O.Y, Titilola F. Salisu, Esther O. Oladele, 4department Of Animal And Environmental Biology, University Of Uyo, Akwa Ibom State, Nigeria, Clement Yaro, Nura Iliyazu, Adam Tukur, Abdulrazaq Izuafa, Muhammad A. Yari

Sultan Qaboos University Journal For Science

The increasing use of plant-based medicines necessitates safety evaluations of all medicinal plants. This study evaluated the effects of mango (Mangifera indica) leaf extracts on albino rats (Rattus norvegicus). The phytochemistry of the plant’s extract was evaluated, followed by a determination of its acute toxicity using 24 rats. Thereafter, the chronic toxicity of the extract was determined using another set of 24 rats, separated into four groups of six rats each. Rats in group 1 (the control) were administered distilled water, while groups 2, 3, and 4 received daily doses of 1000, 2000, and 3000 mg kg-1 body weight, respectively. …

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Haematological And Biochemical Changes In Albino Rats In Response To Bisphenol A (Bpa) Exposure, Enwongo Effiong Nduonofit, Obemeata Emmanuel Oriakpono Apr 2025

Haematological And Biochemical Changes In Albino Rats In Response To Bisphenol A (Bpa) Exposure, Enwongo Effiong Nduonofit, Obemeata Emmanuel Oriakpono

Sultan Qaboos University Journal For Science

The aim of this study was to investigate the haematological and biochemical alterations in albino rats induced by bisphenol A (BPA). Fifteen adult male albino rats were procured and separated into 3 different groups viz: group 1 (control), group 2 (50 mg/kg), group 3 (250 mg/kg); and were orally administered BPA at doses of 50 and 250 mg/kg/week. After 6 weeks of exposure, blood samples were collected for haematological and biochemical assay. The parameters analyzed included: red blood cell count, haemoglobin concentration, packed cell volume, white blood cell count, differential white blood cell count, kidney and liver function tests. The …

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Comparative Study On The Phytochemical, Antistaphylococcal And Antioxidant Properties Of The Stem Bark Of Jatropha Curcas L And Jatropha Gossypifolia L, Oyetayo, V.O, Temenu, O.E Apr 2025

Comparative Study On The Phytochemical, Antistaphylococcal And Antioxidant Properties Of The Stem Bark Of Jatropha Curcas L And Jatropha Gossypifolia L, Oyetayo, V.O, Temenu, O.E

Sultan Qaboos University Journal For Science

This study was conducted to assess the phytochemical, antistaphylococcal and antioxidant properties of the leaf and stem bark of Jatropha curcas and Jatropha gossypifolia. Ethanolic extract of the leaf and stem bark of Jatropha curcas and Jatropha gossypifolia was obtained using standard methods. Qualitative and quantitative phytochemical properties of theJatropha plant was assessed using standard methods. Antistaphylococcal and minimum inhibitory concentration of the extracts were assessed against Staphylococcal aureus obtained from different sources using agar diffusion method. Ferrous ion and hydroxyl radical scavenging activity of the extracts were also determined using standard methods. Quantitative phytochemical screening revealed that the distribution …

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Role Of Nanotechnology In Diagnosing, Safeguarding, And Treating Covid-19, Rohini M. De Silvaa, Kenneth Hulugallaa, Panchali Ranasinghe, Gareth R. Williams, K.M. Nalin De Silva Apr 2025

Role Of Nanotechnology In Diagnosing, Safeguarding, And Treating Covid-19, Rohini M. De Silvaa, Kenneth Hulugallaa, Panchali Ranasinghe, Gareth R. Williams, K.M. Nalin De Silva

Sultan Qaboos University Journal For Science

Coronavirus disease (COVID-19) is arguably the worst health crisis the world has faced in the 21st century, and the World Health Organization declared this a “public health emergency of international concern” during the beginning of the pandemic and continued for a significant period of time. Considering the public health risk and the delay in introducing a suitable medical intervention to eradicate this virus, many reserachers embarked on different technologies to develop a cure. Nanotechnology has emerged as a promising weapon in the fight against COVID-19 and other similar viral diseases. The unique qualities of nanomaterials make them excellent for a …

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Prevalence Of Gastrointestinal Helminthes In Pigs Reared In Research Farms Of Michael Okpara University Of Agriculture, Umudike, South Eastern Nigeria, Ebube Charles Amaechi, Miracle Innocent Dike, Onyinye Mkpola Ukpai, Blessing Uzoamaka Ejike Apr 2025

Prevalence Of Gastrointestinal Helminthes In Pigs Reared In Research Farms Of Michael Okpara University Of Agriculture, Umudike, South Eastern Nigeria, Ebube Charles Amaechi, Miracle Innocent Dike, Onyinye Mkpola Ukpai, Blessing Uzoamaka Ejike

Sultan Qaboos University Journal For Science

Gastrointestinal parasitism in swine production is a world-wide problem especially in tropical resource-poor countries. These infections in animals result in significant economic losses. This study aimed to assess the prevalence and spectrum of gastrointestinal parasites of pigs reared in two research farms in Michael Okpara University of Agriculture, Umudike, South eastern Nigeria. From April, 2016 to July, 2016, 220 samples of pig faeces from two research farms (CASAP Research Farm and MOUAU Commercial Pig Farm) were analyzed using floatation and direct smear methods to identify varied parasitic stages present in the faeces. Data generated showed an overall prevalence of 64.6% …

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Optimization Of Independent Variables For The Production Of Extracellular Alpha Amylase By Bacillus Subtilis Imd34 Using Plackett-Burman Design, Henshaw Effiom, Josiah Lennox Apr 2025

Optimization Of Independent Variables For The Production Of Extracellular Alpha Amylase By Bacillus Subtilis Imd34 Using Plackett-Burman Design, Henshaw Effiom, Josiah Lennox

Sultan Qaboos University Journal For Science

Bacillus species are widely used for thermostable α-amylase production for various applications such as in the detergent and food industries. This research aimed to study the production of α-amylase by B. subtilis IMD34 in submerged fermentation conditions using Plackett-Burman (PB) design, along with the optimization of certain environmental factors for optimal growth of amylolytic bacteria. Plackett-Burman design was used to evaluate the effect of ten independent variables on α-amylase production. Maximum enzyme activity was recorded in a medium containing (g/l); starch (6.0), peptone (12.0), K2HPO4 (1.0), Na2HPO4 (2.0), NaCl (0.6), Na2SO4 (0.1), MgSO4.7H20 (1.0), FeCl3.6H2O (0.02), CaCl2.2H2O (0.02) and with …

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The Deubiquitylase Usp5 Knockdown Reduces Semliki Forest Virus Replication In Hela Cells, Amer Nubgan Apr 2025

The Deubiquitylase Usp5 Knockdown Reduces Semliki Forest Virus Replication In Hela Cells, Amer Nubgan

Sultan Qaboos University Journal For Science

Semliki Forest Virus (SFV), a member of the Alphavirus genus in the Togaviridae family, is a small-enveloped, positive-sense single-stranded RNA (+ssRNA) virus. The virus is spread by mosquitos and can infect humans, resulting in mild febrile disease with symptoms that include fever, myalgia, arthralgia, persistent headaches and asthenia. Virulent strains of SFV in mice cause lethal encephalitis by infecting neurons in the central nervous system. In on-going experiments in the research group using a focused siRNA screen we have investigated the role of deubiquitylases (DUBs) during SFV infection (as a model alphavirus) and monitored the effect of DUB depletion on …

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Lithology Characteristics And Diagenesis Of Late Pleistocene-Holocene Coastal Terraces Of The Yemeni Red Sea: Implication For Paleoclimatic Records, Ahmed Saif Al-Mikhlafi Apr 2025

Lithology Characteristics And Diagenesis Of Late Pleistocene-Holocene Coastal Terraces Of The Yemeni Red Sea: Implication For Paleoclimatic Records, Ahmed Saif Al-Mikhlafi

Sultan Qaboos University Journal For Science

The development of Holocene-Pleistocene fringing reefs in the Yemeni Red Sea (YRS) is controlled by sediment input and variations in accommodation space. Lithostratigraphic correlation of environmental facies in the investigated sites shows a sequence of successive events, and each can be subdivided into 2 or 3 main sequences. The upper sequence is characterized by the dominance of coral and coralline algal frameworks. The lower sequences are varied and can be attributed to spatial and temporal variability. Meteoric diagenesis is the most dominant and includes dissolution, calcrete, and coral recrystallization. Lithologic and mineralogic investigations of the Pleistocene-Holocene coral reefs display three …

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A Surface Network Based On Polytyramine/ Gold Nanoparticles: Characterization, Kinetics, Thermodynamics And Selective Determination Of Norepinephrine, Emad A. Khudaish, Arwa Al-Maskari Apr 2025

A Surface Network Based On Polytyramine/ Gold Nanoparticles: Characterization, Kinetics, Thermodynamics And Selective Determination Of Norepinephrine, Emad A. Khudaish, Arwa Al-Maskari

Sultan Qaboos University Journal For Science

A solid-state sensor was fabricated by a spontaneous electrochemical deposition of polytyramine (Ptyr) film onto a glassy carbon electrode (GCE) which was further peripherally supported by gold nanoparticles (AuNPs). The surface materials of the developed sensor (AuNPs.Ptyr-GCE) were characterized by X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The rate constant of charge transfers (kct) of the as-prepared sensor (8.77 × 10-4 cm/s) was evaluated by fitting the charge transfer resistance (Rct) data in the presence of ferric-ferrous hexacyanide redox couple solution, [Fe(CN)6]3-/4-. The voltammetric behavior of norepinephrine (NOR) was confirmed to …

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Parasitic Contamination Of Local Drinking Water Sources In Aba Metropolis, Abia State, Nigeria, Blessing U. Ejike, Carmelita C. Ohaeri, Ebube C. Amaechi Apr 2025

Parasitic Contamination Of Local Drinking Water Sources In Aba Metropolis, Abia State, Nigeria, Blessing U. Ejike, Carmelita C. Ohaeri, Ebube C. Amaechi

Sultan Qaboos University Journal For Science

Water-borne parasitic infections have become a source of concern in recent times due to the contamination of various water sources. A survey on the parasitic contamination of local drinking water sources in Aba metropolis was carried out between August and October 2018. This was done to evaluate the extent of contamination of these water sources and their public health implications. A total number of eighty (80) water samples were investigated from five (5) major water sources within the study area using the standard sedimentation method and examined for parasite cysts, eggs and larvae. Physical/macroscopic examination was done to determine the …

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Travelling Wave Solutions For Fisher’S Equation Using The Extended Homogeneous Balance Method, Mohammad M. Fares, Usama M. Abdelsalam, Faiza M. Allehiany Apr 2025

Travelling Wave Solutions For Fisher’S Equation Using The Extended Homogeneous Balance Method, Mohammad M. Fares, Usama M. Abdelsalam, Faiza M. Allehiany

Sultan Qaboos University Journal For Science

In this work, the extended homogeneous balance method is used to derive exact solutions of nonlinear evolution equations. With the aid of symbolic computation, many new exact travelling wave solutions have been obtained for Fisher’s equation and Burgers-Fisher equation. Fisher’s equation has been widely used in studying the population for various systems, especially in biology, while Burgers-Fisher equation has many physical applications such as in gas dynamics and fluid mechanics. The method used can be applied to obtain multiple travelling wave solutions for nonlinear partial differential equations.

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Predator-Prey Model With Refuge, Fear And Z-Control, Ibrahim M. Elmojtaba, Kawkab Al-Amri, Qamar J.A. Khan Apr 2025

Predator-Prey Model With Refuge, Fear And Z-Control, Ibrahim M. Elmojtaba, Kawkab Al-Amri, Qamar J.A. Khan

Sultan Qaboos University Journal For Science

In this paper, we consider a predator-prey model incorporating fear and refuge. Our results show that the predator-free equilibrium is globally asymptotically stable if the ratio between the death rate of predators and the conversion rate of prey into predator is greater than the value of prey in refuge at equilibrium. We also show that the co-existence equilibrium points are locally asymptotically stable if the value of the prey outside refuge is greater than half of the carrying capacity. Numerical simulations show that when the intensity of fear increases, the fraction of the prey inside refuge increases; however, it has …

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Comparing Science And Engineering Students Using The Force Concept Inventory In Introductory Physics Courses, Nazife Koca, Nidhal Sulaiman Apr 2025

Comparing Science And Engineering Students Using The Force Concept Inventory In Introductory Physics Courses, Nazife Koca, Nidhal Sulaiman

Sultan Qaboos University Journal For Science

This work is intended to analyze and compare the performance of two groups of students on the understanding of force and motion concepts using the Force Concept Inventory (FCI). The FCI test serves questions on basic Newtonian concepts where the answers inclyde the correct response and commonly misconceived alternatives. The FCI test was implemented twice as pre and post-tests for two introductory calculus-based physics courses offered at the Sultan Qaboos University (SQU) in Oman for students mainly from the Colleges of Sciences, Education and Agriculture and the students from the College of Enginerring in the Spring 2017 and Spring 2018 …

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Determination Of Toxic Metals In Tobacco From Selected Imported Cigarette Brands And Local Tobacco In Iraqi Markets, Wedad H. Al-Dahhan, Emad Yousif, Hassan Hashim Apr 2025

Determination Of Toxic Metals In Tobacco From Selected Imported Cigarette Brands And Local Tobacco In Iraqi Markets, Wedad H. Al-Dahhan, Emad Yousif, Hassan Hashim

Sultan Qaboos University Journal For Science

Metals are essential in many physiological processes in the human body, but can also be detrimental to our health when the concentration is not within recommended permissible limits. Various types of cigarettes were selected from the local markets in Iraq in addition to the Iraqi tobacco from Sulaymaniyah governorate to conduct tests of the elements in these species. The selected samples were tested using EDX instrument. Results proved the presence of dangerous elements such as Cr, Ni, Zn, As, Al, P, S, Pb, Cd, Sn and Sb in quantities which could greatly affect the health of the smoker and have …

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Effects Of Thermal Stratification And Anisotropic Porous Material In A Symmetrically Heated Vertical Channel, Basant K. Jha, Muhammad K. Musa, Abiodun O. Ajibade Apr 2025

Effects Of Thermal Stratification And Anisotropic Porous Material In A Symmetrically Heated Vertical Channel, Basant K. Jha, Muhammad K. Musa, Abiodun O. Ajibade

Sultan Qaboos University Journal For Science

The coexistence in nature of thermally stratified fluids and directionally inclined porous structures abound in geophysical fluid flow. Despite their important applications especially in underground flow, their combined effects on natural convection have not been intensively investigated. This article aims to investigate a fully developed time dependent natural convection of viscous incompressible stably stratified fluid in the presence of anisotropic porous material. The semi analytical solutions of the governing equations for the temperature and velocity fields are obtained using the Laplace Transform Technique, Riemann Sum Approximation and D’Alembert Methods. The choice of the D’Alembert Method is to provide a systematic …

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Effect Of Smokeless Tobacco Product, Afzal, On The Reproductive Hormones And Gonadal Pathology Of Wistar Rats, Nawal Al-Mukhaini, Taher Ba Omar, Elsadig Eltayeb, Aisha Al Khayat Al-Shehi, Jamila Al-Belushi, Nafila Al-Riyami, Romulo Cipriano, Kawther Al-Adawi Apr 2025

Effect Of Smokeless Tobacco Product, Afzal, On The Reproductive Hormones And Gonadal Pathology Of Wistar Rats, Nawal Al-Mukhaini, Taher Ba Omar, Elsadig Eltayeb, Aisha Al Khayat Al-Shehi, Jamila Al-Belushi, Nafila Al-Riyami, Romulo Cipriano, Kawther Al-Adawi

Sultan Qaboos University Journal For Science

Afzal is a common smokeless tobacco product (STP) in Oman, and it is believed to contain toxins that may affect the reproductive hormones and hence reproductive function. This study assessed the effect of Afzal on the gonads of Wistar rats. In order to assess gonad toxicity induced by this STP, an aqueous extract of Afzal was added to drinking water to be administrated orally to Wistar albino rats (n = 72) classified as young (4 weeks old) and adult (20 weeks old) of both genders weighing between 60-80 g and 150-240 g respectively for 8 weeks. The rats were divided …

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