http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Mohamed A. Aboamer,Doaa H. Elgohary,Ali Abdullah Almukil,Ahmed A. Aboamer,Ibrahim M Alarifi,Mohsen Bakouri,Nader A. Rahman Mohamed 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.7
This study aims to examine the mechanical properties of acrylonitrile butadiene styrene specimens using ASTM 638, 695, and 790. UVC radiation was also used as a sterilizing method. The fused deposition modeling of 3D-printed polymerize with 30 % filling was used to manufacture 30 specimens for tensile, compression, and bending. Half of the specimens were treated with UVC, whereas the other half were not. The chosen dosage of 13.5 J/cm 2 with an exposure time of 48 min corresponds to 3650 sterilization treatments or 10 years of sterilization. The average ultimate stress in the tensile test, compression test, and bending test was 34.5 ± 7.4, 25.4 ± 0.5, and 24.5 ± 2.1 Mpa, respectively. The analysis of variance test shows that UVC radiation has a demonstrable influence on tensile specimens, with a P-value of 0.012, which is less than the significance threshold of 0.05. Thus, the null hypothesis is rejected.
Discussions on partial isometries in Banach spaces and Banach algebras
Abdullah Alahmari,Mohamed Mabrouk,Mohamed Aziz Taoudi 대한수학회 2017 대한수학회보 Vol.54 No.2
The aim of this paper is twofold. Firstly, we introduce the concept of semi-partial isometry in a Banach algebra and carry out a comparison and a classification study for this concept. In particular, we show that in the context of $C^*$-algebras this concept coincides with the notion of partial isometry. Our results encompass several earlier ones concerning partial isometries in Hilbert spaces, Banach spaces and $C^*$-algebras. Finally, we study the notion of $(m, p)$-semi partial isometries.
Asiri, Abdullah Mohamed Korean Chemical Society 2003 Bulletin of the Korean Chemical Society Vol.24 No.4
A range of methine dyes has been synthesized by condensation of highly electronegative active methylene compound dicyanomethylenecyclopentane derived from cyclopentanone with the formyl group of substituted benzaldehydes. The electronic absorption spectroscopic properties of the dyes were investigated. In general, substituents on the aromatic aldehyde moiety have a significant effect on the visible absorption maxima of the dyes; increasing the solvent polarity also showed a pronounced effect on the absorption maxima.
An innovative system for novel vibration of rotating FG shell with combination of fraction laws
Khadimallah, Mohamed Amine,Hussain, Muzamal,Al-Thobiani, Faisal,Elbahar, Mohamed,Al Naim, Abdullah F.,Elimame, Elaloui,Harbaoui, Imene,Tounsi, Abdelouahed Techno-Press 2021 Advances in concrete construction Vol.12 No.2
A new model with the combination of the Galerkin's technique have been developed for functionally graded cylindrical shell. For the vibrations of rotating cylindrical shells, three volume fraction laws i.e., polynomial, trigonometric and exponential are combined mathematically. The obtained results show that by increasing length-to-radius and height-to-radius ratios, the backward and forward frequency value decreases and increases, respectively. Moreover, on increasing the rotating speed, the backward frequencies increases and forward frequencies decreases. The results generated furnish the evidence regarding applicability of present model with clamped-clamped boundary conditions and also verified by earlier published literature.
Vibration of SWCNTs: Consistency and behavior of polynomial law index with Galerkin's model
Khadimallah, Mohamed A.,Hussain, Muzamal,Khedher, Khaled Mohamed,Bouzgarrou, Souhail Mohamed,Al Naim, Abdullah F.,Naeem, Muhammad Nawaz,Taj, Muhammad,Iqbal, Zafar,Tounsi, Abdelouahed Techno-Press 2020 Advances in nano research Vol.9 No.4
In this article, vibration attributes of single walled carbon nanotubes based on Galerkin's method have been investigated. The influence of power law index subjected to different end supports has been overtly examined. Application of the Hamilton's variational principal leads to the formation of partial differential equations. The effects of different physical and material parameters on the fundamental frequencies are investigated for armchair and zigzag carbon nanotubes with clamped-clamped, simply supported and clamped-free boundary conditions. By using volume fraction for power law index, the fundamental natural frequency spectra for two forms of Single-Walled Carbon Nanotubes (SWCNTs) are calculated. The influence of frequencies against length-to-diameter ratios with varying power law index are investigated in detail for these tubes. MATLAB software package has been utilized for extracting tube frequency spectra. The obtained results are confirmed by comparing with available literature.
( Abdul Aziz Mohamed Yusoff ),( Fatin Najwa Zulfakhar ),( Siti Zulaikha Nashwa Mohd Khair ),( Wan Salihah Wan Abdullah ),( Jafri Malin Abdullah ),( Zamzuri Idris ) 대한뇌종양학회 대한신경종양학회 2018 Brain Tumor Research and Treatment Vol.6 No.1
Background Mitochondria are major cellular sources of reactive oxygen species (ROS) generation which can induce mitochondrial DNA damage and lead to carcinogenesis. The mitochondrial 10398A>G alteration in NADH-dehydrogenase subunit 3 (ND3) can severely impair complex I, a key component of ROS production in the mitochondrial electron transport chain. Alteration in ND3 10398A>G has been reported to be linked with diverse neurodegenerative disorders and cancers. The aim of this study was to find out the association of mitochondrial ND3 10398A>G alteration in brain tumor of Malaysian patients. Methods Brain tumor tissues and corresponding blood specimens were obtained from 45 patients. The ND3 10398A>G alteration at target codon 114 was detected using the PCR-RFLP analysis and later was confirmed by DNA sequencing. Results Twenty-six (57.8%) patients showed ND3 10398A>G mutation in their tumor specimens, in which 26.9% of these mutations were heterozygous mutations. ND3 10398A>G mutation was not significantly correlated with age, gender, and histological tumor grade, however was found more frequently in intra-axial than in extra-axial tumors (62.5% vs. 46.2%, p< 0.01). Conclusion For the first time, we have been able to describe the occurrence of ND3 10398A >G mutations in a Malaysian brain tumor population. It can be concluded that mitochondrial ND3 10398A>G alteration is frequently present in brain tumors among Malaysian population and it shows an impact on the intra-axial tumors.
Ibrahim Hairul-Islam Mohamed,Ahmed Emad A.,Alzahrani Abdullah M.,Sayed Abdullah A.,Hanieh Hamza 한국응용생명화학회 2022 Applied Biological Chemistry (Appl Biol Chem) Vol.65 No.2
Multiple sclerosis (MS) is a degenerative autoimmune disease attacks the myelin sheath of the central nervous system (CNS) neurons causing different disabilities. According to recent evidence, the main bioactive component in Enicostema axillare , the Swrtiamarin (SM) has been found to exert anti-inflammatory and antioxidant activities against several diseases. However, SM activities in treatment of autoimmune diseases remain to be explored. Herein, we used a murine model of MS, to show that SM treatment ameliorates the severity of experimental autoimmune encephalomyelitis (EAE). This occurs through reducing the levels of pro-inflammatory cytokines and infiltration of CD4+CD45+ cells into CNS. That was associated with a reduction in the expression of STAT3 and NFkB in CD4+ T cells under Th17 and LPS-stimulated macrophages. Furthermore, in silico studies revealed that SM interacts with NF-E2-related factor 2 (NRF2), and therefore, suppressed oxidative stress by inducing formation NRF2-antioxidant response element (ARE) complex. We found that SM is an agonist of NRF2 complex regulating the total CD4 population and antioxidant markers in EAE mice. Molecular docking analysis showed a stable and higher binding affinity between SM and NRF2. Results revealed that SM treatment increased the complex formation between ARE and NRF2 where immunoprecipitation methods showed a higher binding affinity of ARE to NRF2 in SM treated animals. Complex formation triggered ARE cascade of antioxidant gene clusters and reduces the MS pathological alterations in EAE mice model. Current data proposed SM as an effective biomolecule in treatment of MS and controlling neuronal damage through inhibiting oxidative stress markers and targeting NRF2.
Waleed Seif Eldin Mohamed Mostafa,Mohammed Hassan Saiem Al-Dahr,Dalia Abdel Hamid Omran,Zeinab Fathy Abdullah,Suzan Hamdy Elmasry,Mohamed Nabil Ibrahim 대한간학회 2020 Clinical and Molecular Hepatology(대한간학회지) Vol.26 No.1
Background/Aims: Epigenetics involved in multiple normal cellular processes. Previous research have revealed the role of hepatitis C virus infection in accelerating methylation process and affecting response to treatment in chronic hepatitis patients. This work aimed to elucidate the role of promoter methylation (PM) in response to antiviral therapy, and its contribution to the development of fibrosis through hepatocarcinogenesis-related genes. Methods: A total of 159 chronic hepatitis Egyptian patients versus 100 healthy control group were included. The methylation profile of a panel 9 genes (SFRP1, p14, p73, APC, DAPK, RASSF1A, LINE1, O6MGMT, and p16) was detected in patients’ plasma using methylation-specific polymerase chain reaction (MSP). Results: Clinical and laboratory findings were gathered for patients with combined pegylated interferon and ribavirin antiviral therapy. Regarding the patients’ response to antiviral therapy, the percentage of non-responders for APC, O6MGMT, RASSF1A, SFRP1, and p16 methylated genes were significantly higher versus responders (P<0.05). Of the 159 included patients, the most frequent methylated genes were SFRP1 (102/159), followed by p16 (100/159), RASSF1A (98/159), then LINE1 (81/159), P73 (81/159), APC (78/159), DAPK (66/159), O6MGMT (66/159), and p14 (54/159). A total of 67/98 (68.4%) cases of RASSF1A methylated gene (P=0.0.024), and 62/100 (62%) cases of P16 methylated gene (P=0.03) were associated with mild-degree fibrosis. Conclusions: To recapitulate, the PM of SFRP1, APC, RASSF1A, O6MGMT, and p16 genes increases in chronic hepatitis C patients, and can affect patients’ response to antiviral therapy. The RASSF1A and P16 genes might have a role in the distinction between mild and marked fibrosis.
Quantum-Enhanced Machine Learning Algorithms for Heart Disease Prediction
Alotaibi Saud S.,Mengash Hanan Abdullah,Dhahbi Sami,Alazwari Sana,Marzouk Radwa,Alkhonaini Mimouna Abdullah,Mohamed Abdullah,Hilal Anwer Mustafa 한국컴퓨터산업협회 2023 Human-centric Computing and Information Sciences Vol.13 No.-
Heart disease has grown more prominent among various age groups. Early prediction of heart failure and treating them with the most care can the human life. Today healthcare system depends on a computer-aided diagnosis system. Quantum improved machine learning approaches are a critical factor, play a significant role in healthcare systems due to their robust nature, and build novel medical traits, patient data, and management of patients’ record and chronic disease detection, etc. Traditional machine learning approaches effectively predict heart disease but still lack efficiency due to noise and appropriate feature size. This informs the researchers to use quantum improved ML that will provide the accurate prediction of chronic diseases in a granular way. Applying these merits of quantum computing, healthcare systems are implementing quantum-based machine learning (QML) approaches for predicting heart disease. This paper proposes a quantum ML with quantum particle swarm optimization (QPSO) to predict heart disease and compare it with the traditional ML approach called multilayer perceptron (MLP) using the evaluation metrics. It uses exploratory preprocessing to normalize the input heart disease data. The number of qubits is the number of features in the dataset. The efficiency of the quantum-ML approaches is evaluated using publicly available heart disease dataset. The proposed QML with QPSO secured an improved accuracy of 96.7%, a false detection rate of 0.09, and a computation time is 135ms. However, the comparison results prove that QML with QPSO confirmed satisfactory results in predicting heart disease with improved accuracy.
Mohamed Abdelaty Habila,Zeid Abdullah ALOthman,Saad A. Al-Tamrah,Ayman Abdel Ghafar,Mustafa Soylak 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.32 No.-
The widespread use of pesticides leads to considerable attention for pesticide detection and removal. Therefore, in the first part of this work, a simple and facile solid phase extraction (SPE) procedure forseparation of malathion from soil and water samples, has been established. Malathion was recovered at apH of 2.0–3.0 with limit of detection (LOD) of 0.026 ng L 1. While in the second part, the kinetics of thebatch adsorption removal of malathion from aqueous solutions was investigated. Results showed thatmalathion adsorption onto activated carbon followed second order kinetics models most appropriatelywith adsorption capacity of 32.1 mg g 1.