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Decoration of vertically aligned TiO2 nanotube arrays with WO3 particles for hydrogen fuel production

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Frontiers in Energy 2018年第2期12卷 249-258页

作者： Heba ALI N. ismail m. S. AmIN mohamed mEKEWI Physical Chemistry Department National Research Centre DokkiCairo 12622 Egypt Chemistry Department Faculty of Science Ain Shams UniversityAbbassia Cairo 12622 Egypt Chemistry Department Faculty of Science Taibah University Madinah Munawwarah Saudi Arabia

WO3 decorated photoelectrodes of titanium nanotube arrays （W-oxide TNTAs） were synthesized via a two-step process, namely, electrochemical oxidation of titanium foil and electrodeposition of W-oxide for various interval times of 1, 2, 3, 5, and 20 min to improve the photoelectrochemical performance and the amount of hydrogen generated. The synthesized photoelectrodes were characterized by various characterization techniques. The presence of tungsten in the modified TNTAs was confirmed using energy dispersive X-ray spectroscopy （EDX）. Field emission scanning electron microscopy （FESEm） and high resolution transmission electron microscope （HRTEm） proved the deposition of W-oxide as small particles staked up on the surface of the tubes at lower deposition time whereas longer times produced large and aggregate particles to mostly cover the surface of TiO2 nanotubes. Additionally, the incorporation of WO3 resulted in a shift of the absorption edge toward visible light as confirmed by UV-Vis diffuse reflectance spectroscopy and a decrease in the estimated band gap energy values hence, modified TNTAs facilitated a more efficient utilization of solar light for water splitting. From the photoelectrochemical measurement data, the optimal photoelectrode produced after 2 min of deposition time improved the photo conversion efficiency and the hydrogen generation by 30% compared to that of the pure TNTA.

关键词： titanium dioxide nanotube arrays potentiostaticanodization electrodeposition method tungsten oxide photoelectrochemical water splitting

Antimonene-based saturable absorber for a soliton mode-locked and Q-switched fiber laser in the 2 μm wavelength region

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Chinese Physics B 2023年第6期32卷 259-269页

作者： H Ahmad B Nizamani m Z Samion N Yusoff m F ismail Photonics Research Centre Universiti Malaya50603 Kuala LumpurMalaysia Physics Department Faculty of ScienceUniversiti Malaya50603 Kuala LumpurMalaysia Distinguished Visiting Professor Universiti Kuala Lumpur British Malaysian Institute(UniKL BMI)Batu 8Jln Sungai Pusu53100SelangorMalaysia

We demonstrate antimonene as a saturable absorber(SA) to generate an ultrafast mode-locked and Q-switched laser in the 2 μm wavelength region. The two antimonene-based SAs were prepared and inserted separately in a thulium–holmiumdoped fiber laser to produce the pulsed laser. Antimonene was coated onto a tapered fiber to generate soliton mode-locked pulses and used in thin-film form for the generation of Q-switched pulses. The mode-locking was stable within a pump power of 267 m W–511 m W, and the laser operated at a central wavelength of 1897.4 nm. The mode-locked laser had a pulse width of 1.3 ps and a repetition rate of 12.6 mHz, with a signal-to-noise ratio of 64 d B. Q-switched laser operation was stable at a wavelength of 1890.1 nm within a pump power of 312 m W–381 m W. With the increase in pump power from 312 m W to 381 m W, the repetition rate increased to a maximum of 56.63 k Hz and the pulse width decreased to a minimum value of 2.85 μs. Wide-range tunability of the Q-switched laser was also realized within the wavelength range of1882 nm–1936 nm.

关键词： mode-locking Q-switched fiber laser optical saturable absorber

Numerical Simulation of modified Kortweg-de Vries Equation by Linearized Implicit Schemes

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Applied mathematics 2020年第11期11卷 1139-1161页

作者： m. S. ismail Fakhirah Alotaibi Department of math King Abdulaziz University Jeddah Saudi Arabia

In this paper, we are going to derive four numerical methods for solving the modified Kortweg-de Vries (mKdV) equation using fourth Pade approximation for space direction and Crank Nicolson in the time direction. Two nonlinear schemes and two linearized schemes are presented. All resulting schemes will be analyzed for accuracy and stability. The exact solution and the conserved quantities are used to highlight the efficiency and the robustness of the proposed schemes. Interaction of two and three solitons will be also conducted. The numerical results show that the interaction behavior is elastic and the conserved quantities are conserved exactly, and this is a good indication of the reliability of the schemes which we derived. A comparison with some existing is presented as well.

关键词： mKdV Equation Pade Approximation Nonlinear Numerical Schemes Linearly Implicit Schemes Fixed Point method Interaction of Solitons

Root-Specific Transcript Profiling of Contrasting Rice Genotypes in Response to Salinity Stress

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molecular Plant 2011年第1期4卷 25-41页

作者： Olivier Cotsaftis Darren Plett Alexander A.T. Johnson Harkamal Walia Clyde Wilson Abdelbagi m. ismail Timothy J. Close mark Tester Ute Baumann Australian Centre for Plant Functional Genomics Private Mail Bag 1 Glen Osmond SA 5064 Australia Present address: School of Botany University of Melbourne Parkville Vic 3010 Australia Department of Botany and Plant Sciences University of California Riverside CA 92521 USA Present address: Department of Agronomy and Horticulture University of Nebraska Lincoln NE 68588 USA United States Department of Agriculture Agricultural Research Service George E. Brown Jr Salinity Laboratory Riverside CA 92507 USA International Rice Research Institute Manila The Philippines

Elevated salinity imposes osmotic and ion toxicity stresses on living cells and requires a multitude of responses in order to enable plant survival. Building on earlier work profiling transcript levels in rice （Oryza sativa） shoots of FL478, a salt-tolerant indica recombinant inbred line, and IR29, a salt-sensitive cultivar, transcript levels were compared in roots of these two accessions as well as in the roots of two additional salt-tolerant indica genotypes, the landrace Pokkali and the recombinant inbred line IR63731. The aim of this study was to compare transcripts in the sensitive and the tolerant lines in order to identify genes likely to be involved in plant salinity tolerance, rather than in responses to salinity perse. Transcript profiles of several gene families with known links to salinity tolerance are described （e.g. HKTs, NHXs）. The putative function of a set of genes identified through their salt responsiveness, transcript levels, and/or chro- mosomal location （i.e. underneath QTLs for salinity tolerance） is also discussed. Finally, the parental origin of the Saltol region in FL478 is further investigated. Overall, the dataset presented appears to be robust and it seems likely that this system could provide a reliable strategy for the discovery of novel genes involved in salinity tolerance.

关键词： Rice root salinity tolerance microarray HKT Saltol.

Benign course of residual inflammation at end of treatment of liver transplant recipients after sofosbuvir based therapy

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World Journal of Hepatology 2022年第3期14卷 602-611页

作者： Bahaaeldeen ismail Karim m Benrajab Pablo Bejarano Phillip Ruiz Debbie Sears Andreas Tzakis Xaralambos Bobby Zervos Division of Digestive Diseases and Nutrition University of Kentucky College of MedicineLexingtonKY 40536United States Department of Pathology Cleveland Clinic FloridaWestonFL 33331United States Department of Pathology University of Miami Miller School of MedicineMiamiFL 33136United States Department of Liver Transplant Cleveland Clinic FloridaWestonFL 33331United States

BACKGROUND Persistent inflammation on histology after successful hepatitis C(HCV)treatment has been ***,data regarding the long-term impact in liver transplant recipients is limited,particularly after using direct-acting antiviral(DAA)*** To evaluate the impact of successful treatment with DAAs on histological changes and occult HCV and to describe the clinical course of residual inflammation in liver transplant *** We conducted a case series of 13 chronic HCV infected liver transplant recipients successfully treated with DAAs between December 2013 and may *** patients were treated for 24 wk and had non-detectable serum HCV RNA by the time of *** patients with at least one liver biopsy at or after treatment were *** examined liver biopsies for evidence of residual inflammation and the presence of intrahepatic HCV *** Persistent inflammation was seen in 12/13 patients on end of treatment *** was still seen in the available five follow-up biopsies(range 38-48 wk after the end of treatment).Intrahepatic HCV RNA was undetectable in all *** patients had preserved graft function for a mean follow-up of 2.5 years,except one that developed chronic *** After successful HCV treatment with DAAs,liver transplant recipients may have persistent inflammation on biopsy without evidence of intracellular *** clinical outcome remained favorable in most *** studies with a larger number and longer follow-up are needed to establish the implication of this finding on long-term graft function.

关键词： Immunosuppression Liver transplantation Recurrent hepatitis C Sustained virologic response Interferon

Ferrara ring segments implantation for treating keratoconus

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International Journal of Ophthalmology(English edition) 2012年第5期5卷 586-590页

作者： mohammed Ali Abu Ameerh Ghada ismail Hamad Osama H. Ababneh Almutez m. Gharaibeh Rola m. Al Refai muawyah D. Al Bdour Department of Ophthalmology Jordan University HospitalAmman Jordan Department of Students Counseling the University of JordanAmman Jordan

AIm: To investigate the efficacy of Ferrara rings (FR) implantation in the treatment of ***: It was a retrospective case series descriptive study. The sample was comprised of 50 patients 79 eyes diagnosed with progressive keratoconus. This included 24 (48%) males and 26 (52%) females between the age of 13 and 44 years. All participants underwent surgical implantation of FR in the period between January 2009 and September 2010 at Jordan University Hospital. Thorough ophthalmologic examinations were applied to measure vital variables for each pathological condition before and after surgery. RESULTS: Findings indicated an overall significant postoperative improvement in both uncorrected visual acuity (UCVA) and best spectacle corrected visual acuity (BSCVA) throughout follow up visits. moreover, results illustrated a significant decrease in spherical equivalent (SE) and keratometric readings (lower, higher and the average). CONCLUSION: Surgical intervention strategies are being frequently developed to meet the needs of patients with keratoconus. The implantation of Ferrara rings has proven to be a safe and feasible alternative procedure for the treatment of mild-moderate keratoconus especially for patients with contact lenses intolerance. We have found that this procedure has improved visual outcomes in all eyes studied. Nevertheless, further research is needed to investigate long term outcomes.

关键词： cornea keratoconus Ferrara rings intracorneal ring segments.

The Spatial Structure of Zooplankton Communities of Pedu Reservoir,malaysia

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湿地科学 2012年第4期10卷 423-428页

作者： Amir Shah Ruddin md Shah Johan ismail Diana Latief Wan maznah Wan Omar School of Biological Sciences Universiti Sains MalaysiaMinden11800 PenangMalaysia Department of Animal Science and Fishery Faculty of Agriculture and Food SciencesUniversiti Putra MalaysiaUPM Bintulu Campus97008 BintuluSarawakMalaysia

A total of 22 species of zooplankton were identified from 8 sampling stations located in the limnetic zone of Pedu *** zooplankton community was dominated by rotifers (11 species),followed by cladocerans (9 species) and copepods (2 species).Four species of zooplankton comprised of 3 rotifers,Brachionus quadridentata,Brachionus caudatus and Keratella cochlearis and one cladoceran,Ceriodaphnia cornuta were present at all sampling *** richness was highest at Station 2 (17 species) followed by Station 4 and Station 8 (14 species),Station 5 (15 species),Station 7 (11 species),Station 6 (10 species),Station 3 (9 species) and Station 1 (7 species).With an exception of water transparency,all other water quality parameters such as temperature,dissolved oxygen,conductivity,pH and total dissolved solids were not significant when compared between sampling *** study found that station 5 which was located in a calm strait,protected from strong wave and wind was a suitable area for zooplankton growth and *** supporting the findings included highest water transparency (3.4 m),rich in species numbers (15 species),high diversity index (0.950) and evenness index (0.808).

关键词：水生生物学研究方法演化浮游生物

Numerical Solution of Kortweg-de Vries Equation

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Applied mathematics 2020年第4期11卷 344-362页

作者： Fakhirah Alotaibi m. S. ismail Dept. of math King Abdulaziz University Jeddah Saudi Arabia

In this paper, we are going to derive numerical methods for solving the KdV equation using Pade approximation for space direction, trapezoidal and implicit mid-point rule in the time direction. The schemes will be analyzed for accuracy and stability. The exact solution and the conserved quantities will be used to display the efficiency and the robustness of the proposed schemes. Interaction of two and three solitons will be conducted. The numerical results showed, interaction behavior is elastic and the conserved quantities are conserved which is a good indication of the reliability of the schemes under consideration.

关键词： KdV Soliton Pade Approximation Numerical Schemes Interaction of Solitons

Ciliotherapy： a novel intervention in polycystic kidney disease

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Journal of Geriatric Cardiology 2014年第1期11卷 63-73页

作者： Sarmed H. Kathem Ashraf m. mohieldin Shakila Abdul-majeed Sajida H. ismail Qaiss H. Altaei Ibrahim K. Alshimmari mohanned m. Alsaidi Hussein Khammas Andromeda m. Nauli Bina Joe Surya m. Nauli Centerfor Hypertension and Personalized medicine University of Toledo Health Science Building Room 312 3000 Arlington Ave. Toledo OH 43614 USA Department of Pharmacology University of Toledo Health Education Building Room 274 3000 Arlington Ave. Toledo OH 43614 USA College of Pharmacy University of Baghdad Bab-Almoadhum 14026 Baghdad Iraq Kidney Disease and Transplant Center Medical City Complex Bab-Almoadhum 14026 Baghdad Iraq Alkadhumia Academic Hospital Bab-Almoadhum 14026 Baghdad Iraq pharmaceutical & Biomedical Sciences California Northstate University 10811 International Drive Rancho Cordova CA 95670 USA

Background Ciliopathies are a group of diseases associated with abnormal structure or function of primary cilia. Ciliopathies include polycystic kidney disease （PKD）, a pathology associated with vascular hypertension. We previously showed that cilia length regulates cilia function, and cilia function is required for nitric oxide （NO） biosynthesis in endothelial cells. Because patients with PKD show abnormal sensory cilia function, the aim of our current study was to search for a targeted therapy focused on primary cilia, which we refer to as ＇cilio- therapy＇. methods and Results In the present studies, our in vitro analyses refined fenoldopam as an equipotent and more specific dopa- minergic agonist to regulate cilia length and function. Our in vivo studies indicated that fenoldopam increased cilia length and serum NO thereby reducing blood pressure in a PKD mouse model. Our crossover, multicenter, double-blind and placebo-controlled clinical study further indicated that cilia-targeting therapy showed an overall reduction in mean arterial pressure in PKD patients. Conclusions Overall, our studies provide the first evidence of ciliotherapy as an innovative intervention in patients with abnormal primary cilia.

关键词： Primary cilium Blood pressure mechanosensor mechanotransduction Chemosensor Fluid-shear stress