Article
Spectroscopy
D. Pankin, A. Povolotckaia, E. Borisov, M. Belyakov, S. Borzenko, A. Gulyaev, M. Moskovskiy
Summary: The structure and rotational conformers of the rubrofusarin molecule were investigated using DFT approach. It was found that stable molecules have a group symmetry close to Cs. The rotation of the methoxy group had the smallest potential barrier. The modelling of vibrational spectra and electronic singlet transition were carried out, showing a small shift in absorption bands wavelength for the methoxy group rotation conformer and a larger shift for the tautomer.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Crystallography
Dmitrii Pankin, Anastasia Povolotckaia, Mikhail Smirnov, Evgenii Borisov, Anatoly Gulyaev, Alexey Dorochov, Vasiliy Novikov, Sergey Kuznetsov, Oleg Noy, Sergey Belousov, Maksim Moskovskiy
Summary: The article studies the structure, optical properties and stability of Anhydrofusarubin. The computational results obtained using density functional theory are in good agreement with experimental data. The study finds the presence of slightly higher energy tautomers and two conformational enantiomer forms. The vibrational and UV-visible absorption spectra were simulated and interpreted.
Article
Spectroscopy
Fran Nekvapil, Alexander Bunge, Lucian Barbu Tudoran, Simona Cinta Pinzaru
Summary: This study investigated the impact of manganese and zinc-doped ferrite nanoparticles (NPs) on cyanobacteria using micro-Raman spectroscopy. The results showed an increase in carotenoid signal relative to chlorophyll contribution in cyanobacteria exposed to manganese-ferrite NPs, suggesting a change in carotenoid profile towards an increased amount of b-carotene in response to NPs stress.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Review
Chemistry, Multidisciplinary
Mina Guli, Elsayed T. Helmy, Jenny Schneider, Gui Lu, Jia Hong Pan
Summary: This review provides an overview of the recent advances in characterization methodology and photocatalytic activity evaluation of solar-driven catalysts (SDCs) for environmental remediation. The compositional, structural, and optical characterizations of SDCs are summarized, and the challenges in characterization methods for doped and coupled SDCs are discussed. Furthermore, the challenges in evaluating the photocatalytic activity of SDCs are highlighted.
TOPICS IN CURRENT CHEMISTRY
(2022)
Article
Nuclear Science & Technology
K. R. M. Abdelgawad, G. S. M. Ahmed, A. T. M. Farag, A. A. Bendary, S. M. Salem, B. A. Tartor, I. I. Bashter
Summary: This study investigates the physical and radiation shielding capabilities of a newly developed glass system incorporating silica extracted from rice straw ash. The purity and chemical composition of the silica are determined, and the synthesized glass is confirmed to be amorphous. Various parameters, including molar volume, optical parameters, and density, are investigated. Experimental measurements of gamma-ray shielding parameters are conducted, and the results are compared with theoretical calculations. The newly prepared glass system is found to have superior properties for shielding gamma-rays compared to other common materials.
PROGRESS IN NUCLEAR ENERGY
(2023)
Article
Chemistry, Physical
Tanaji M. Nimbalkar, Yogesh M. Jadhav, Reshma N. Dhanawade, Nanasaheb S. Pawar, Avinash C. Molane, Shivani S. Gavande, Ganesh T. Chavan, Chan-Wook Jeon, Shrikrishna D. Sartale, Vikas B. Patil
Summary: CeO2 nanoparticles were synthesized using a simple chemical method without surfactants or additives at low temperature and short reaction time. The effect of annealing temperatures on the structural, morphological, and chemiresistive properties of the CeO2 nanoparticles was investigated. The CeO2 nanoparticles exhibited a cubic crystal structure and porous morphology, with a specific surface area of 52.92 m2/g. The optimized operating temperature was found to be 150 degrees C, showing excellent response and stability towards NO2 gas.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Parul Sharma, Pankaj Biswas, Prabhakar Singh, Kamni
Summary: A simplistic method was used to synthesize NaSr(1-x)VO4:xMn(2+) nanophosphors with 0.25 <= x <= 3.0 mol% through combustion synthesis route, using urea as an organic fuel. The structural, spectral, and optical properties were examined, revealing the mid gap absorption phenomenon when doping the host with Mn2+ ions. Photoluminescence analysis showed two prominent emissions at 434 nm and 523 nm under excitation at 380 nm, indicating the potential of this phosphor material to be excited by UVA emitting InGaN LEDs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Condensed Matter
Parul Sharma, Pragati Singh, Kamni
Summary: This study systematically investigated Mn2+ doped KSrVO4 nanophosphors synthesized by low-cost combustion method, revealing their structural and spectral properties through various characterization techniques. The doping of Mn2+ was found to affect the band gap and PL spectra, indicating the potential application of these nanophosphors excited by InGaN LEDs emitting UVA light.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Environmental Sciences
Yaping Xie, Zengfu Guan, Jixia Cheng, Yuxuan Zhou, Mingquan Yan
Summary: This study utilized UV-Vis absorbance spectroscopy to monitor the binding of Al(III) and Fe(III) onto NOM at varying pH values, revealing a competition between the two metals. The differential log-transformed absorbance was found to quantify the amount of metal ions bound to NOM and differentiate the competition based on metal-specific features.
Article
Materials Science, Multidisciplinary
T. S. Soliman, M. F. Zaki, M. M. Hessien, Sh. I. Elkalashy
Summary: This study aimed to synthesize BaTiO3 nanocrystalline particles using the tartrate precursor process, and then prepare nanocomposite films with PVA. Analysis using XRD and FTIR showed complex interactions between BaTiO3 nanoparticles and the PVA matrix. As the concentration of BaTiO3 nanoparticles in the PVA matrix increased, the optical band gap decreased while the Urbach energy increased.
Article
Chemistry, Physical
Shalendra Kumar, Faheem Ahmed, Nagih M. Shaalan, Nishat Arshi, Saurabh Dalela, Keun H. Chae
Summary: CeXO2 (X: Fe, Mn) nanoparticles were synthesized and characterized for their structural, morphological, magnetic, and electrochemical properties. XRD, FE-TEM, dc magnetization, Raman analysis, and NEXAFS analysis confirmed the successful incorporation of Fe and Mn in CeO2 matrix and the formation of FCC fluorite structure. The Fe-doped CeO2 showed the lowest band gap and enhanced room temperature ferromagnetism. Ce0.95Fe0.05O2 electrode exhibited excellent electrochemical performance for energy storage devices.
Article
Crystallography
Faheem Ahmed, Suliman Yousef AlOmar, Fadwa Albalawi, Nishat Arshi, Sourabh Dwivedi, Shalendra Kumar, Nagih Mohammed Shaalan, Naushad Ahmad
Summary: The silver nanoparticles synthesized using a one-step microwave irradiation technique exhibited a single-phase face-centered cubic structure with an absorption maximum at 420 nm, confirming their formation. Transmission electron microscopy analysis revealed the nanoparticles to be spherical with an average diameter of approximately 6 nm. These nanoparticles showed strong antibacterial properties against various microorganisms, with the highest zone of inhibition observed against Pseudomonas aeruginosa.
Article
Chemistry, Physical
Oana Andreea Lazar, Anastas Savov Nikolov, Calin Constantin Moise, Sabrina Rosoiu, Mariana Prodana, Marius Enachescu
Summary: This study presents the synthesis of platinum nanoparticles (Pt-NPs) using pulsed laser ablation in aqueous ethanol solution. The optical and morphological properties of the Pt-NPs were investigated by varying the laser fluence, repetition rate, and ethanol concentrations. The results revealed that the synthesized Pt-NPs had mean size values in the range of 1.7-2.45 nm and a certain level of aggregation.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
J. Arumugam, Amal George, X. Venci, A. Dhayal Raj, A. Albert Irudayaraj, R. L. Josphine, S. John Sundaram, Wedad A. Al-onazi, Amal M. Al-Mohaimeed, Tse-Wei Chen, K. Kaviyarasu
Summary: Investigation on the basic properties and dielectric behavior of Bi2S3 nanorods reveals that well-oriented nanorods exhibit high dielectric constant and low dielectric loss. Bi2S3 nanorods with good crystallinity and polycrystalline nature have been synthesized using a forced condensation method. The dispersion of relaxation time at higher temperature was analyzed through the cole-cole analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Noah Burke, Panagiotis Panoutsopoulos, Otto J. Gregory
Summary: A novel thermal paint based on lead-silicate glass powder sintering was developed to map maximum temperature with high resolution over a 60 degrees C range. The paint showed excellent adhesion to nickel-based superalloy components and an optical transition was observed and confirmed using various techniques. This high resolution temperature mapping technique can improve the performance, efficiency, and reliability of gas turbine engines.
INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
(2023)
Article
Multidisciplinary Sciences
Prabhakaran Vasantha-Srinivasan, Pavana K. Sivadasan Unni, Sengodan Karthi, Raja Ganesan, Sengottayan Senthil-Nathan, Muthiah Chellappandian, Narayanaswamy Radhakrishnan, Rajakrishnan Rajagopal, Krutmuang Patcharin
Summary: This study investigates the phyto-chemical screening and toxicity of chloroform crude extracts from Ageratum conyzoides on the pest Spodoptera litura and beneficial earthworm. The results show that the extract is toxic to the pest and has adverse effects on larval-pupal growth and development. However, it is less toxic to non-target earthworms.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Govindan Rajivgandhi, Chenthis Kanisha Chelliah, Manavalan Murugan, Govindan Ramachandran, Gnanasekaran Chackaravarthi, Muthuchamy Maruthupandy, Franck Quero, Arulraj Arunachalam, Mangalaraja Ramalinga Viswanathan, Jamal M. Khaled, Fetim S. AlHarbi, Wen-Jun Li
Summary: This study focuses on the screening and analysis of phytochemical and bioactive compounds from the marine mangrove plant Avicennia marina. The results confirm the antioxidant, antimicrobial, and bactericidal activities of the plant extract. The findings suggest that A. marina has the potential to be a future drug discovery plant against multidrug resistant pathogens.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Mohd Javed Akhtar, Maqusood Ahamed, Hisham Alhadlaq
Summary: This study compares the effects of two types of cobalt-based nanoparticles on lung cells and finds that cobalt nanoparticles are more toxic to cells than cobalt-iron oxide nanoparticles, possibly due to the higher release of Co2+ ions by cobalt nanoparticles. Additionally, the study suggests that CalceinAM alone is insufficient to assess the toxicity of cobalt-based nanoparticles, and other methods should be used for further confirmation.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Ahmad Mohammad Salamatullah, Mohammed Asif Ahmed, Khizar Hayat, Fohad Mabood Husain, Shaista Arzoo, Abdulhakeem Alzahrani, Asdaf Alotaibi, Heba Khalil Alyahya, Syed Rizwan Ahmad
Summary: This study investigated the effects of different drying methods on the polyphenol and flavonoid content, as well as the antioxidant properties of rose petals. The results showed that oven-dried samples had the highest levels of polyphenols and flavonoids, as well as the strongest antioxidant activity.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
J. Bharathi, S. Nandhini
Summary: This paper considers a single-server queue model with Modified Bernoulli Vacation. The server offers Compulsory Service and Non-Compulsory Re-service. The Probability Generating Function for the system is derived using the Supplementary Variable Method, and numerical examples are discussed to demonstrate the impact of system parameters.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Raju Suresh Kumar, Dhaifallah M. Al-thamili, Khloud Ibrahim Al-Shemaimari, Faruq Mohammad, Mohamad Altaf, Rashid Ayub
Summary: Eight new functionalized spirooxindole-pyrrolizidine heterocyclic hybrids have been synthesized and characterized. The compound with no substitution on the aryl rings displayed the highest anticancer activity. The most active compounds were further tested for toxicity effects and their impact on cell viability was investigated by assaying free radicals, apoptosis, and caspases.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Alaa Ali Hameed
Summary: This study provides a comprehensive analysis of the integration of hyperspectral sensors and artificial intelligence. It proposes a hybrid strategy that combines BPVAM with PCA for the classification of hyperspectral images and demonstrates that this model is efficient for hyperspectral sensor classification.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Muhammad Muzaffar Ali Khan Khattak, Nor Azwani Mohd-Shukri, Tahir Mahmood, Mukhtar Ahmed, Syed Najmul Hejaz Azmi, Mahboob Alam, Murni Nazira Sarian, Qamar Uddin Ahmed
Summary: This research aimed to evaluate the effect of mixed herbs on blood HbA1c and liver function in type 2 diabetes mellitus patients. The results showed that the consumption of mixed herbs improved HbA1c levels without significant changes in blood urea, creatinine, and liver enzymes.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Natarajan Arumugam, Khloud Ibrahim Al-Shemaimari, Mohammad Altaf, Karuppiah Ponmurugan, Dhanaraj Premnath, Sinouvassane Djearamane, Ling Shing Wong, Saminathan Kayarohanam
Summary: This study synthesized a new class of spiro compounds as potential antibiotics and evaluated their antimicrobial efficacy. Compound 4a showed significant activity against tested pathogens. This research is important for the development of effective antimicrobial therapies.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Zsolt Giczi, Beatrix Sik, Viktoria Kapcsandi, Erika Lakatos, Angela Mrazik, Rita Szekelyhidi
Summary: This study examined the composition of micro- and macroelements, total antioxidant, and polyphenols in different types of dried houseleek and fresh plant decoctions. The results showed that the type of houseleek greatly influenced the composition. Mn was present in high amounts among microelements, while Ca and Na were present in larger quantities among macroelements. The drying methods had some influence on the antioxidant and polyphenol content.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Eunjeong Jeon, Sangbuem Cho, Seongsoo Hwang, Kwanghyun Cho, Cedric Gondro, Nag-Jin Choi
Summary: A body weight prediction model was developed using milk production traits, providing a useful indicator for energy balance evaluation in dairy cows. The deep neural network (DNN) model showed the best predictive accuracy for body weight compared to other models. It was found that the transition from negative to positive energy balance varied among cows. Energy balance indexes were proposed to estimate and monitor individual cows' energy balance during lactation.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Sohail Rehman, Souhail Bouzgarrou, Mehdi Akermi, Hashim
Summary: This study investigates the steady flow of viscoelastic fluid in a deformable channel. The mathematical structure for computing the impacts of fluid viscoelasticity on the flow is provided, and the dimensionless variables influencing the interaction between the fluid and structure are identified. The results show that the converging and diverging sections of the channel are affected similarly by the inertial forces and channel opening. Longer strain delaying time and shorter stress relaxation phase improve the velocity profile of the fluid flow.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Article
Multidisciplinary Sciences
Muhammad Umar Ijaz, Syeda Sania Zahara, Moazama Batool, Mikhlid H. Almutairi, Ayesha Ishtiaq, Asma Ashraf
Summary: This experiment evaluated the therapeutic effects of Kaempferide (KMF) on Paraquat (PQ) induced cardiac toxicity in rats. The findings showed that KMF alleviated the cardiac damage caused by PQ through reducing oxidative stress and inflammation.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
Correction
Multidisciplinary Sciences
Saganuwan Alhaji Saganuwan, Otiger Fredrick Egworrow, Agbo Joseph Ode
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2024)
