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Improving of photocatalytic activity of barium ferrate via bismuth and copper co-doping for degradation of paracetamol under visible light irradiation

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Journal of Environmental Sciences 2022年第2期34卷 331-342页

作者： Hussien ahmed Abbas Rabab ahmed Nasr Rose-Noelle Vannier Tarek Samir Jamil Inorganic Chemistry Department National Research CentreCairo 12622Egypt Water Pollution Control Department National Research CenterCairo 12622Egypt Univ.Lille CNRSCentrale LilleENSCLUniv.ArtoisUMR 8181Unite de Catalyse et Chimie du Solide(UCCS)Lille 59000France

Nanosized Ba_(1-x)Bi_(x)Fe_(1-x)Cu_(x)O_(3)(12–50 nm)with x values of 0,0.01,0.05,and 0.1 system was prepared using the Pechini ***,morphological,surface and optical characterizations were performed for the prepared *** phase was the predominant phase for the undoped BaFeO_(3)and Bi and Cu co-doped BaFeO_(3)*** phases of monoclinic Ba_(2)Fe_(2)O_(5),orthorhombic BaFe_(2)O_(4)and orthorhombic BaCO_(3)were identified for all the prepared ***_(0.95)Bi_(0.05)Fe_(0.95)Cu_(0.05)O_(3)sample has the lowest band gap(2.43 e V).98.1%paracetamol removal was achieved with 0.75 g/L of Ba_(0.95)Bi_(0.05)Fe_(0.95)Cu_(0.05)O_(3)at pH9 after 120 *** paracetamol degradation follows the pseudo first-order ***·is the main oxidative species responsible for the paracetamol *** chromatography–mass spectrometry(GC–MS)analysis was performed at the end of the photocatalytic degradation experiment under optimum operating condition using Ba_(0.95)Bi_(0.05)Fe_(0.95)Cu_(0.05)O_(3)to explain the reaction mechanism and identify the intermediate by-products which is confirmed by ultraviolet/visible(UV/Vis)spectroscopy study at different reaction times.

关键词： Ba_(1-x)Bi_(x)Fe_(1-x)Cu_(x)O_(3) Photocatalytic degradation Nanomaterials Paracetamol

A Note on z-Ideals and z°-Ideals of the Formal Power Series Rings and Polynomial Rings in an Infinite Set of Indeterminates

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Algebra Colloquium 2020年第3期27卷 495-508页

作者： ahmed Maatallah Ali Benhissi Faculty of Sciences of Monastir MonastirTunisia

Let A be a *** this paper we generalize some results introduced by Aliabad and *** give a relation bet ween the z-ideals of A and t hose of the formal power series rings in an infinite set of indetermiiiates over *** A[[Xa]]3 and its subrings A[[X_(A)]]_(1),A[[X_(A)]]_(2),and A[[X_(A)]]_(α),where a is an infinite cardinal *** fact,a z-ideal of the rings defined above is of the form I+(X_(A))i,where i=1,2,3 or an infinite cardinal number and I is a z-ideal of *** addition,we prove that the same condition given by Aliabad and Mohamadian can be used to get a relation between the minimal prime ideals of the ring of the formal power series in an infinite set of indeterminates and those of the ring of *** a natural result,we get a relation between the z°-ideals of the formal power series ring in an infinite set of indeterminates and those of the ring of coefficients.

关键词： z-ideal z°-ideal formal power series ring polynomial ring infinite set of inde terminates

Ischemic bowel disease in 2021

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World Journal of Gastroenterology 2021年第29期27卷 4746-4762页

作者： Monjur ahmed Department of Medicine Division of Gastroenterology and HepatologyThomas Jefferson UniversityPhiladelphiaPA 19107United States

Ischemic bowel disease(ISBODI)includes colon ischemia,acute mesenteric ischemia(AMI)and chronic mesenteric ischemia(CMI).Epidemiologically,colon ischemia is the most common type followed by AMI and *** are various risk factors for the development of *** pain is the common presenting symptom of each *** clinical suspicion is essential in ordering appropriate *** studies and colonoscopy with biopsy are the main diagnostic *** varies from conservative measures to surgical resection and *** of multidisciplinary team is essential in managing *** open surgery with revascularization plays an important role,recently there is an increasing interest in percutaneous endovascular treatment.

关键词： Colon ischemia Ischemic colitis Acute mesenteric ischemia Chronic mesenteric ischemia Endovascular treatment of acute and chronic mesenteric ischemia

Checkpoint inhibitors: What gastroenterologists need to know

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World Journal of Gastroenterology 2018年第48期24卷 5433-5438页

作者： Monjur ahmed Division of Gastroenterology and Hepatology Department of Internal MedicineThomas Jefferson University

Checkpoint inhibitors are increasingly being used in clinical practice. They can cause various gastrointestinal,hepatic and pancreatic side effects. As these side effects can be serious, appropriate management is essential. The different checkpoint inhibitors with their mechanisms of action and indications, as well as evaluation and management of gastrointestinal, hepatic and pancreatic side effects, are discussed in this article.

关键词： Checkpoint inhibitors Immunotherapy Gastrointestinal management Hepatic and pancreatic side effects

Prediction of regular wave loads on a fixed offshore oscillating water column-wave energy converter using CFD

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Journal of Ocean Engineering and Science 2016年第4期1卷 268-283页

作者： ahmed Elhanafi National Centre for Maritime Engineering and Hydrodynamics Australian Maritime CollegeUniversity of TasmaniaLauncestonTasmania 7250Australia Department of Naval Architecture and Marine Engineering Alexandria UniversityAlexandriaEgypt

In this paper,hydrodynamic wave loads on an offshore stationary-floating oscillating water column(OWC)are investigated via a 2D and 3D computational fluid dynamics(CFD)modeling based on the RANS equations and the VOF surface capturing *** CFD model is validated against previous experiments for nonlinear regular wave interactions with a surface-piercing stationary *** the validation stage,the numerical model is modified to consider the pneumatic damping effect,and an extensive campaign of numerical tests is carried out to study the wave-OWC interactions for different wave periods,wave heights and pneumatic damping *** is found that the horizontal wave force is usually larger than the vertical ***,there a direct relationship between the pneumatic and hydrodynamic vertical forces with a maximum vertical force almost at the device natural frequency,whereas the pneumatic damping has a little effect on the horizontal ***,simulating the turbine damping with an orifice plate induces higher vertical loads than utilizing a slot ***,3D modeling significantly escalates and declines the predicted hydrodynamic vertical and horizontal wave loads,respectively.

关键词： Offshore oscillating water column OWC Hydrodynamic wave loads Numerical wave tank CFD 3D effects

Deceptive jamming suppression in multistatic radar based on coherent clustering

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Journal of Systems Engineering and Electronics 2018年第2期29卷 269-277页

作者： ABDALLA ahmed ahmed Mohaned Giess Shokrallah ZHAO Yuan XIONG Ying TANG Bin School of Electronic Engineering University of Electronic Science and Technology of China

This paper proposes a suppression method of the deceptive false target(FT) produced by digital radio frequency memory(DRFM) in a multistatic radar system. The simulated deceptive false targets from DRFM cannot be easily discriminated and suppressed with traditional radar systems. Therefore, multistatic radar has attracted considerable interest as it provides improved performance against deception jamming due to several separated receivers. This paper first investigates the received signal model in the presence of multiple false targets in all receivers of the multistatic radar. Then, obtain the propagation time delays of the false targets based on the cross-correlation test of the received signals in different receivers. In doing so, local-density-based spatial clustering of applications with noise(LDBSCAN) is proposed to discriminate the FTs from the physical targets(PTs) after compensating the FTs time delays, where the FTs are approximately coincident with one position, while PTs possess small *** simulations are carried out to demonstrate the feasibility and validness of the proposed method.

关键词： multistatic radar clustering analysis electronic counter-countermeasure(ECCM) deceptive jamming

Imipramine-precipitated status epilepticus

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World Journal of Pediatrics 2021年第2期17卷 218-219页

作者： ahmed Naguy Al-Manara CAP Centre Kuwait Centre for Mental Health(KCMH)Jamal Abdul-Nassir StShuwaikhState of Kuwait

Frontal lobe epilepsy has a complex and atypical semiology that may masquerade as psychiatric or parasomnias[1].An electroencephalography(EEG)and sleep lab workup should be an integral part of clinical assessment of these cases to avoid potential pitfalls in management with serious conse-quences as evidenced in this clinical *** mistak-ing epilepsy for anxiety,imipramine,a tricyclic antidepres-sant,known to lower seizure threshold,was prescribed and resulted in status *** letter concludes with a brief literature review of antidepressants and seizure risk.

关键词： epilepsy clinical epileptic

Recent advances in the management of gastrointestinal stromal tumor

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World Journal of Clinical Cases 2020年第15期8卷 3142-3155页

作者： Monjur ahmed Division of Gastroenterology and Hepatology Department of Internal MedicineThomas Jefferson UniversityPhiladelphiaPA 19107United States

Gastrointestinal stromal tumor(GIST)is a rare but an important clinical entity seen in our clinical *** is the most common mesenchymal tumor of the gastrointestinal tract and most common malignancy of the small *** the exact prevalence of GIST is not known,the incidence of GIST has been *** arise from interstitial cells of *** of the GISTs occur due to mutation in c-kit gene or platelet derived growth factor receptor alpha gene.15%of GISTs do not have these mutations and they are called wildtype *** all GISTs express KIT receptor tyrosine ***,GISTs look like spindle cell tumors most of the time but they can be epitheloid or mixed *** median size of GISTs varies from 2.7 cm to 8.9 ***,patients with small GISTs remain asymptomatic but as the GIST size increases,patients present with various symptoms depending on the location of the *** of GISTs are located in the stomach or small *** is suspected on imaging and endoscopic studies,and confirmed by tissue acquisition with immunohistochemical *** aggressiveness of GISTs depends on the size,mitotic index and *** resection is the treatment of *** various endoscopic modalities of resection are increasingly being *** kinase inhibitors are extremely useful in the management of large GISTs,unresectable GISTs and metastatic *** options for metastatic GISTs also include radiotherapy,chemotherapy,hepatic artery embolization,chemoembolization and radiofrequency ablation.

关键词： Gastrointestinal stromal tumor Mesenchymal tumor of gastrointestinal tract Gastrointestinal subepithelial tumors Management of gastrointestinal stromal tumor Familial gastrointestinal stromal tumor Risk stratification

Machine learning and data-driven prediction of pore pressure from geophysical logs:A case study for the Mangahewa gas field,New Zealand

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第6期14卷 1799-1809页

作者： ahmed E.Radwan David A.Wood ahmed A.Radwan Faculty of Geography and Geology Institute of Geological SciencesJagiellonian UniversityKraków30-387Poland Exploration Department Gulf of Suez Petroleum CompanyCairoEgypt DWA Energy Limited LincolnUK Department of Geology Faculty of ScienceAl-Azhar UniversityAssiut BranchAssiut71524Egypt

Pore pressure is an essential parameter for establishing reservoir conditions,geological interpretation and drilling *** pressure prediction depends on information from various geophysical logs,seismic,and direct down-hole pressure ***,a level of uncertainty accompanies the prediction of pore pressure because insufficient information is usually recorded in many *** machine learning(ML)algorithms can decrease the level of uncertainty of pore pressure prediction uncertainty in cases where available information is *** this research,several ML techniques are applied to predict pore pressure through the over-pressured Eocene reservoir section penetrated by four wells in the Mangahewa gas field,New *** predictions substantially outperform,in terms of prediction performance,those generated using a multiple linear regression(MLR)*** geophysical logs used as input variables are sonic,temperature and density logs,and some direct pore pressure measurements were available at the reservoir level to calibrate the predictions.A total of 25,935 data records involving six well-log input variables were evaluated across the four *** ML methods achieved credible levels of pore pressure prediction *** most accurate models for predicting pore pressure in individual wells on a supervised basis are decision tree(DT),adaboost(ADA),random forest(RF)and transparent open box(TOB).The DT achieved root mean square error(RMSE)ranging from 0.25 psi to 14.71 psi for the four *** trained models were less accurate when deployed on a semi-supervised basis to predict pore pressure in the other *** two wells(Mangahewa-03 and Mangahewa-06),semi-supervised prediction achieved acceptable prediction performance of RMSE of 130—140 psi;while for the other wells,semi-supervised prediction performance was reduced to RMSE>300 *** results suggest that these models can be used to predict pore pressure in nearby locat

关键词： Machine learning(ML) Pore pressure Overburden Well-log derived predictions Overpressure