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Alenad Asma M.,Fatima Sofia,Khalid Usman,Bano Nigarish,Abid Abdul Ghafoor,Manzoor Sumaira,Farid Hafiz Muhammad Tahir,Messali Mouslim,Alzahrani Huda A.,Taha Taha Abdel Mohaymen 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.5
Hydrogen is the ideal future fuel, since it is clean, saves energy, and is abundant in nature. Though there are several methods for producing hydrogen, only a few of them are environmentally friendly. To employ water electrolysis to make hydrogen and solve the energy shortage problem, highly active electrocatalysts must be created. Zinc sulphide/polyaniline (ZnS/PANI) nanocomposite was successfully produced using a straightforward two-step coprecipitation and polymerization procedure. Different analyses were used to characterize the fabricated materials. The findings show that the ZnS/PANI nanocomposite's morphology has a consistent porous shape, and the electrical structure of the active sites determines how well catalysts can make contact with the intermediates. Multiple attempts have been made to create the most affordable, functional electrocatalyst for oxygen evolution reactions (OER). However, clean energy production from such materials is sluggish. In comparison to pure PANI nanofibers (143.14 m2 g−1 and 0.4827 nm) and ZnS nanostructures (249.85 m2 g−1 and 0.4224 nm), the composite ZnS/PANI displays a greater Brunauer–Emmett–Teller (BET) surface area around 372.65 m2 g−1 along with nanoporous size of 0.393 nm due to the interaction, which provides distinctive features in contrast to ZnS and PANI. Synergistically, composite ZnS/PANI indicates lower overpotentials of 132 mV for oxygen evolution performance at 10 mA cm−2. An improved OER activity is observed by composite ZnS/PANIs as high current density, lower overpotential and reduced Tafel value of 53 mV dec−1. This catalyst also exhibited a significant double-layer capacitance and a large electrochemically active surface area. ZnS/PANI is a magnificent electrocatalyst for oxygen evolution.
Khan, M.S.,Ali, T.,Abid, M.N.,Jo, M.H.,Khan, A.,Kim, M.W.,Yoon, G.H.,Cheon, E.W.,Rehman, S.U.,Kim, M.O. Pergamon Press 2017 Neurochemistry International Vol.108 No.-
Lithium an effective mood stabilizer, primary used in the treatment of bipolar disorders, has been reported as a protective agent in various neurological disorders. In this study, we examined the neuroprotective role of lithium chloride (LiCl) against lipopolysaccharide (LPS) in the cortex and hippocampus of the adult rat brain. We determined that LiCl -attenuated LPS-induced activated toll-like receptor 4 (TLR4) signalling and significantly reduced the nuclear factor-<SUB>k</SUB>B (NF-<SUB>K</SUB>B) translation factor and various other inflammatory mediators such as interleukin-1 beta (IL-1β) and tumour necrosis factor alpha (TNF-α). We also analyzed that LiCl significantly abrogated activated gliosis via attenuation of specific markers for activated microglia, ionized calcium-binding adaptor molecule (Iba-1) and astrocytes, glial fibrillary acidic protein (GFAP) in both the cortex and hippocampus of the adult rat brain. Furthermore, we also observed that LiCl treatment significantly ameliorated the increase expression level of apoptotic neurodegeneration protein markers Bax/Bcl2, activated caspase-3 and poly (ADP-ribose) polymerase-1 (PARP-1) in the cortex and hippocampus regions of the LPS-treated adult rat brain. In addition, the morphological results of the fluoro-jade B (FJB) and Nissl staining showed that LiCl attenuated the neuronal degeneration in the cortex and hippocampus regions of the LPS-treated adult rat brain. Taken together, our Western blot and morphological results indicated that LiCl significantly prevents the LPS-induced neurotoxicity via attenuation of neuroinflammation and apoptotic neurodegeneration in the cortex and hippocampus of the adult rat brain.
Alenad Asma M.,Aman Salma,Ahmad Naseeb,Rashid Abdul Rasheed,Abid Abdul Ghafoor,Manzoor Sumaira,Nisa Mehar Un,Messali Mouslim,Alzahrani Huda A.,Taha Taha Abdel Mohaymen 한국세라믹학회 2024 한국세라믹학회지 Vol.61 No.1
The next generation of lightweight, flexible electronic equipment allows mechanical bending compatible with roll-to-roll technologies. In a novel method, a hydrothermal, wide potential is applied for the synthesis of samarium selenide–multiwalled carbon nanotubes (SmSe2–MWCNT) composite material. The chemical and physical characteristics for SmSe2–MWCNT are investigated with electrochemical assessments and X-ray diffraction (XRD) as well as via scanning electron microscopy (SEM). Under alkaline conditions, the SmSe2/MWCNT electrocatalyst shows a good activity for oxygen evolution reaction (OER). SmSe2–MWCNT nanocomposites appear to be good OER candidates in alkaline environments because of high ratio of catalytically active sites and faster electron movement, which increased the material’s conductivity, with current density, overpotential, and Tafel slope of 10 mA cm−2, 315 mV, and 73 mV dec−1, respectively, and displayed decent stability of 20 h via chronoamperometry test. The findings demonstrate that the SmSe2–MWCNT electrode could be employed as a potential candidate for hydrogen production.
Prediction of compressive strength of concrete using neural networks
Yousef A. Al-Salloum,Abid A. Shah,Saleh H. Alsayed,Tarek H. Almusallam,M.S. Al-Haddad,H. Abbas 사단법인 한국계산역학회 2012 Computers and Concrete, An International Journal Vol.10 No.2
This research deals with the prediction of compressive strength of normal and high strength concrete using neural networks. The compressive strength was modeled as a function of eight variables: quantities of cement, fine aggregate, coarse aggregate, micro-silica, water and super-plasticizer, maximum size of coarse aggregate, fineness modulus of fine aggregate. Two networks, one using raw variables and another using grouped dimensionless variables were constructed, trained and tested using available experimental data, covering a large range of concrete compressive strengths. The neural network models were compared with regression models. The neural networks based model gave high prediction accuracy and the results demonstrated that the use of neural networks in assessing compressive strength of concrete is both practical and beneficial. The performance of model using the grouped dimensionless variables is better than the prediction using raw variables.
Acoustic Modes of Multi-Ion Dusty Plasmas
N. Ahmad,Majeed Ur Rehman,M. N. S. Qureshi,Y. Al-Hadeethi,A. A. Abid,Naveed Akram 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.76 No.9
In this manuscript, we aim to derive a general dispersion relation applicable to a multi-component dusty plasma including massive negatively charged dust particles, both negative and positive ions, and electrons. Using the fluid treatment of plasma, we derive dispersion relations for dust ion-acoustic waves (DIAWs) and dust acoustic waves (DAWs) in self-gravitating dusty plasmas and collisional dusty plasmas by incorporating multiple species such as electrons, positive/negative ions, etc. Effects that arise in multicomponent dusty plasma due to negative ions are also discussed. The results obtained in this study are applicable in various space environments, such as cometary plasmas, astrophysical situations, planetary rings and interstellar medium.
Shah, S A,Yoon, G H,Chung, S S,Abid, M N,Kim, T H,Lee, H Y,Kim, M O Nature Publishing Group 2017 Molecular psychiatry Vol.22 No.3
<P>Extensive evidence has indicated that a high rate of cholesterol biogenesis and abnormal neuronal energy metabolism play key roles in Alzheimer's disease (AD) pathogenesis. Here, for we believe the first time, we used osmotin, a plant protein homolog of mammalian adiponectin, to determine its therapeutic efficacy in different AD models. Our results reveal that osmotin treatment modulated adiponectin receptor 1 (AdipoR1), significantly induced AMP-activated protein kinase (AMPK)/Sirtuin 1 (SIRT1) activation and reduced SREBP2 (sterol regulatory element-binding protein 2) expression in both <I>in vitro</I> and <I>in vivo</I> AD models and in Adipo<SUP>−/−</SUP> mice. Via the AdipoR1/AMPK/SIRT1/SREBP2 signaling pathway, osmotin significantly diminished amyloidogenic Aβ production, abundance and aggregation, accompanied by improved pre- and post-synaptic dysfunction, cognitive impairment, memory deficits and, most importantly, reversed the suppression of long-term potentiation in AD mice. Interestingly, AdipoR1, AMPK and SIRT1 silencing not only abolished osmotin capability but also further enhanced AD pathology by increasing SREBP2, amyloid precursor protein (APP) and β-secretase (BACE1) expression and the levels of toxic Aβ production. However, the opposite was true for SREBP2 when silenced using small interfering RNA in APPswe/ind-transfected SH-SY5Y cells. Similarly, osmotin treatment also enhanced the non-amyloidogenic pathway by activating the α-secretase gene that is, <I>ADAM10</I>, in an AMPK/SIRT1-dependent manner. These results suggest that osmotin or osmotin-based therapeutic agents might be potential candidates for AD treatment.</P>
A Low Cost Electro-Oculogram (EOG) Controlled Assistive Wheel Chair
Raheel Riaz,S.Hammad Akhter,Aisha Masood,Ana Zulfiqar,Khoula Abid,Kiran Akhter,S. M. Omair,Zia Mohyud-din 한국재활복지공학회 2016 한국재활복지공학회 학술대회논문집 Vol.2016 No.11
Increased Paralysis or physical disability cases are one of the greatest problems of this technologically developing world. It destroys the life and self-esteem of the survivor and they become dependable on others to fulfill their mobility needs. Many works has been done to aid their disability and to give them independent mobility. Several sophisticated methods have been designed to generate such assistive devices to help the disable peoples. Some of such devices include the use of cameras to produce movement based on eye gaze, another such method consists of the use of high-end computer systems that can process the data efficiently but these are very expensive and less portable. This research introduce a cost effective method to generate assistive device to guide and control the wheel chair for disable people, it involves the non-sophisticated technology based on analog filters, amplifiers and Electrooculography (measure of the Corneo-retinal standing potential that exists between the front and the back of the human eye.). Eye movement directions are used to guide and control the wheel chair.
Inheritance of Pigeonpea Sterility Mosaic Disease Resistance in Pigeonpea
Abhijit Daspute,B. Fakrudin,Shivarudrappa. B. Bhairappanavar,S. P. Kavil,Y. D. Narayana,Abid Yerimani,B. M. Khadi,P. U. Krishnaraj,Muniswamy,Anil Kaumar 한국식물병리학회 2014 Plant Pathology Journal Vol.30 No.2
A comprehensive study was conducted using PPSMV resistant (BSMR 736) and susceptible (ICP 8863) genotypes to develop a segregating population and understand the inheritance of PPSMV resistance. The observed segregation was comparable to 13 (susceptible): 3 (resistant). Hence, the inheritance was controlled by two genes, SV1 and SV2, with inhibitory gene interaction.
Magnetotransport and Trapping of Magnetic Domain Walls in Spin Valves With Nanoconstrictions
Noh, S. J.,Chun, B. S.,Wu, H. C.,Shvets, I. V.,Chu, I. C.,Abid, M.,Serrano-Guisan, S.,Kim, Y. K. IEEE 2011 IEEE transactions on magnetics Vol.47 No.10
<P>In a magnetic nanowire, a magnetic domain wall (DW) can move along the wire when an applied magnetic field or a spin-polarized current is applied. A magnetic spin-valve device composed of two nanowires connected by a nanosized constriction was prepared, on which the presence of a pinned DW by nanoconstriction was detected by giant magnetoresistance effect. When the magnetic wire has a nanoconstriction, the DW configuration and width were largely affected by the shape of nanoconstriction. An asymmetric magnetotransport behavior observed in the experiments was interpreted by a micromagnetic modeling study.</P>