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Egyptian Consensus on Hyperkalemia Management: Lessons from Recent Evidences

International Journal of Clinical Medicine 2023年第9期14卷 402-418页

作者： Magdy Abdelhamid Tarek el Baz Mohamed H. Hafez May A. Hassaballa Hesham elsayed magdi el sharkawy Ahmed F. elKeraie Gamal Saadi Emad R. Issak Department of Cardiovascular Medicine Faculty of Medicine Kasr Al-Aini Cairo University Cairo Egypt Department of Nephrology Faculty of Medicine Al-Azhar University Cairo Egypt Department of Nephrology Faculty of Medicine Kasr Al-Aini Cairo University Cairo Egypt Department of Nephrology Faculty of Medicine Ain Shams University Cairo Egypt Department of Nephrology Faculty of Medicine Alexandria University Alexandria Egypt Department of Internal Medicine Faculty of Medicine Ain Shams University Cairo Egypt

Acute and chronic hyperkalemia is linked to higher hospitalization rates and mortality rates. It has a high prevalence among dialysis and non-dialysis patients in Egypt. The current therapy options are not that ideal. Moreover, we have a critical management paradox in cardiorenal diseases: Should we use the optimum dose of RAASi with its higher incidence of HK, or should we decrease the dose or even stop it with all its harmful hazards? Therefore, in light of the recent updates in different clinical practice guidelines, we, a country-specific (Egypt) task force, gathered to develop a clear, evidence-based, and multi-disciplinary consensus for managing HK. This manuscript illustrates the recommendations of this expert committee. The panel recommends new evidenced K binders like Sodium Zirconium Cyclosilicate (SZC) and patiromer to help manage HK in cardiorenal patients as stated by different international guidelines. In emergency settings, SZC can have a role in managing acute HK;however, it should be used in addition to other drugs like insulin and glucose. Local research studies on the utilization of these novel K binders are highly recommended. The utilization of these novel K binders as prophylaxis should be tested first in a well-designed randomized controlled trial.

关键词： Hyperkalemia Potassium Binders Sodium Zirconium Cyclosilicate Patiromer

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Enhancing Canola Yield and Photosynthesis under Water Stress with Hydrogel Polymers

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1623-1645页

作者： elham A.Badr Gehan Sh.Bakhoum Mervat Sh.Sadak Ibrahim Al-Ashkar Mohammad Sohidul Islam Ayman el Sabagh magdi T.Abdelhamid Field Crops Research Department National Research CentreCairo12622Egypt Botany Department National Research CentreCairo12622Egypt Plant Production Department College of Food and Agriculture SciencesKing Saud UniversityRiyadh12271Saudi Arabia Department of Agronomy Hajee Mohammad Danesh Science and Technology UniversityDinajpur5200Bangladesh Department of Field Crops Faculty of AgricultureSiirt UniversitySiirt56100Turkey Department of Agronomy Faculty of AgricultureKafrelsheikh UniversityKafrelsheikh33516Egypt Department of Research Centers Montana State UniversityBozemanMT 59717USA

While Egypt’s canola production per unit area has recently grown,productivity remains low,necessitating increased *** are water-absorbent polymer compounds that can optimize irrigation schedules by increasing the soil’s ability to retain ***,twoﬁeld experiments were conducted to examine hydrogel application to sandy soil on canola growth,biochemical aspects,yield,yield traits,and nutritional quality of yielded seeds grown under water deﬁcit stress *** experiments were conducted by arranging a split-plot layout in a randomized complete block design(RCBD)with three times replications of each *** water stress at 75%or 50%of crop evapotranspiration(ETc)lowered chlorophyll a,chlorophyll b,caro-tenoids,and total pigments content,indole-3-acetic acid,plant development,seed yield,and oil and total carbo-hydrates of seed yield,hydrogel treatment enhanced all of the traits mentioned ***,hydrogel enhanced to gather compatible solutes(proline,amino acids,total soluble sugars),phenolics content in leaves,seed protein,and crop water productivity,which increased while the plants were under water *** results revealed that the full irrigation(100%ETc)along with hydrogel compared to water-stressed(50%ETc)led to enhanced seed yield(kg ha^(-1)),Oil(%),and Total carbohydrates(%)of rapeseed by 57.1%,11.1%and 15.7%,***,under water-stressed plots with hydrogel exhibited enhancement by 10.0%,3.2%and 5.1%in seed yield(kg ha^(-1)),oil(%),and total carbohydrates(%)of rapeseed by 57.1%,11.1%and 15.7%,respec-tively compared to *** a result,the use of hydrogel polymer will be a viable and practical solution for increasing agricultural output under water deﬁcit stress situations.

关键词： Hydrogel oil osmolytes rapeseed yield water stress

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Adaptive Control System for Biogas Power Plant Using Model Predictive Control

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Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 1193-1204页

作者： Samaa Fawzy Mohammed Saeed Abdelfattah eladl magdi el-Saadawi electrical Engineering Department Mansoura UniversityMansouraEgypt

This paper presents an adaptive control system using model predictive control for a biogas-fueled power *** control scheme is derived from an anaerobic digestion model that includes the concentration of biodegradable volatile solid in the reactor,the concentration of volatile solid in influent,the concentration of acidogens,and the concentration of *** these concentrations are the state variables of model predictive *** whole biogas-fueled power system has been modeled,implemented,and tested in MATLAB/Simulink *** validate the performance of the proposed controller,different operation conditions are studied and *** simulation results prove the effectiveness and the applicability of the proposed control system under different operating conditions.

关键词： Anaerobic digestion micro-turbine model predictive control state space biogas

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Remote Monitoring of electric Vehicle Charging Stations in Smart Campus Parking Lot

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Journal of Modern Power Systems and Clean Energy 2020年第1期8卷 124-132页

作者： Mohamed A.Ahmed Mohamed R.el-sharkawy Young-Chon Kim Department of electronic Engineering Universidad Técnica Federico Santa MaríaValparaíso 2390123Chile Department of Communications and electronics Higher Institute of Engineering&TechnologyKing MarriottAlexandria 23713Egypt Department of Automotive and Tractor Engineering Minia UniversityEl-Minia 61111Egypt Department of Computer Engineering Chonbuk National UniversityJeonju 561-756Korea

Smart parking lots are smart places capable of supporting both parking and charging services for electric vehicles(EVs).In order to manage EV charging,the parking lot local controller(PLLC)requires data exchange with EV charging stations(EVCSs)through communication ***,data losses and communication delays are unavoidable and may significantly degrade the system *** work aims to investigate the underlying communication networks for remote monitoring of EVCSs in a smart campus parking *** communication network consists of two subnetworks:parking area network(PAN)and campus area network(CAN).PAN covers communication among EVs,charging stations and PLLC,while CAN enables dedicated communication between PLLCs and a global controller of the *** one of the major obstacles in EV system is the lack of unified communication architecture to integrate EVCS in the power grid,we develop communication models for the in-vehicle system and EVCSs based on logical node concept of IEC 61850 ***,we implement network models for EVCSs using OPNET *** communication technologies and configurations are considered in modeling and simulations,and end-toend delay is evaluated and discussed.

关键词： Communication network electric vehicle(EV) electric vehicle charging station(EVCS) IEC 61850 OPNET smart parking lot

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Characterization and color rendering enhancement of some LEDs for photometric application

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Journal of Measurement Science and Instrumentation 2017年第4期8卷 364-370页

作者： A Al-Kamel F M el-sharkawy E M el-Moghazy Department of Photometry National Instituted of Standard (NIS) Giza 12211-136 Egypt

The new standards for the photometric characterization of light-emitting diode(LED)sources and luminaries require the measurement evaluation of photometric and colorimetric *** present work studies the performance of some types of LED light sources in different spectra and different color temperature for photometric and colorimetric *** study depends on mixed spectra of these different types of LEDs to enhance the color rendering index(CRI)to be near as possible to standard *** of LED sources requires the evaluation of some photometric and colorimetric quantities such as luminous flux(),chromaticity coordinates(x,y)and(u′,v′),correlated color temperature(CCT)and color rending indices(CRI).

关键词： photometry light-emitting diodoes (LEDs) chromaticity color rendering indices

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Recalibration of working standard lamps

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Journal of Measurement Science and Instrumentation 2016年第3期7卷 291-296页

作者： E M el-Moghazy F M el-sharkawy Alaa-eldin Abd-elmageed Photometry Department National Institute for Standard(NIS)

In the present work, recalibration of the National Institute for Standards （NIS, Egypt） working standard lamps from Osram Inc. and their associated expanded uncertainty budget were done. A set-up composed of an integrating sphere, a standard photometer and a group of five luminous flux standard lamps ranged from 25 to 200 W calibrated and traceable to the National Physical Laboratory （NPL, UK） is used to measure and recalibrate the total luminous flux for these five working standard lamps. After recalibration, NIS （Egypt） maintains the national scales for luminous flux in lumen.

关键词： luminous flux working standard lamps standard photomer integrating sphere

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Voltage imbalance mitigation in an active distribution network using decentralized current control

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Protection and Control of Modern Power Systems 2023年第2期8卷 68-84页

作者： Ahmed M.M.Nour Ahmed A.Helal magdi M.el-Saadawi Ahmed Y.Hatata Alexandria Higher Institute of Engineering and Technology(AIET) AlexandriaEgypt Department of electrical and Control Engineering Arab Academy for Science and Technology and Maritime TransportAlexandriaEgypt Department of electrical Engineering Faculty of EngineeringMansoura UniversityMansouraEgypt Department of electrical Engineering College of EngineeringShaqra UniversityShaqraKingdom of Saudi Arabia

Voltage imbalance(VI)is caused by the difference in connected single-phase load or generation in a low voltage distribution network(DN).VI increase in a smart distribution grid is due to the current practice of increasing single-phase distributed generators such as photovoltaic(PV)*** paper proposes a decentralized control method to mitigate VI using distributed batteries included in smart grid interfaced residential PV *** mitigate VI using the batteries in this way,five challenges must be overcome,i.e.,equalizing all battery stress currents within the DN,mitigating VI in abnormal conditions such as signal loss among bus controllers,being immune from the distorted feedback measurements,minimizing the steady-state error at different loads,and overcoming the insufficient number or capacity of the distributed batteries at the same *** fuzzy logic controllers(FLC)are proposed at each bus to overcome these five tasks based on a decentralized control *** proposed decentralized control based on FLC is compared with centralized control based on a PI *** proposed control method is tested and verified using simulations in the MATLAB/Simulink software,and the results validate the ability of the scheme to alleviate VI on a smart distribution network under both normal and abnormal conditions.

关键词： Fuzzy controller Distributed batteries Decentralized control Voltage imbalance Distributed PV

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Forensic toxicological study on adipocere formation in submerged cadavers of female albino rats intoxicated with cadmium

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Forensic Sciences Research 2021年第2期6卷 159-167页

作者： Nabela I.el-sharkawy Yasmina M.Abd-elhakim Alklech M.Alklech Department of Forensic Medicine and Toxicology Faculty of Veterinary MedicineZagazig UniversityZagazigEgypt

There is a dearth of information on the mutual interaction between metal intoxication and adipocere ***,40 adult female albino rats were distributed into two equal groups,one used as control while the other orally administered single dose of cadmium chloride(CdCl_(2))225mg/kg·bw(LD_(min)).Control group was killed by cervical *** of dead rats of both groups were subjected for determination of iodine value and estimation of cadmium(Cd)residues while the other half of both groups were submerged in opened glass container previously filled with 4L dechlorinated tap water kept in closed room with an open air access(one cadaver/container).Gross morphological changes of submerged cadavers were recorded weekly along the *** the end of the experiment,after 3months,samples were collected again for iodine value determination and estimation of Cd *** obtained results revealed the depressant effect of Cd toxicity on development of *** residues were found in different tissues of cadavers at time of death with the highest amount in the intestines followed by the liver and kidneys,then lungs,adipose tissue,muscles,and finally the *** 3months of water submersion,tissues exhibited significant decrease in the amount of Cd residues but to a limit that was still *** study concluded the possibility of detection of Cd residues even after adipocere ***,it shed light on the possibility of the interference of environmental pollution with the natural rate of decomposition especially adipocere formation.

关键词： Forensic sciences forensic toxicology adipocere cadmium submersion rats

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Stress-Tolerant Cassava: The Role of Integrative Ecophysiology-Breeding Research in Crop Improvement

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Open Journal of Soil Science 2012年第2期2卷 162-186页

作者： Mabrouk A. el-sharkawy Centro Internacional de Agricultura Tropical (CIAT) Cali Colombia.

This review highlights an integrative multidisciplinary eco-physiological, breeding and agronomical research on the tropical starchy root crop cassava conducted at CIAT. Laboratory and field studies have elucidated several physio-logical/biochemical mechanisms and plant traits underlying the high productivity in favorable conditions and tolerance to stressful environments, such as prolonged water stress and marginal low-fertility soils. Cassava is endowed with inherent high photosynthetic capacity expressed in near optimal environments that correlates with biological produc- tivity across environments and wide range of ***-measured photosynthetic rates were also associated with root yield, particularly under prolonged drought. Extensive rooting systems and stomatal sensitivity to both atmospheric humidity and soil water shortages underlie tolerance to drought. The C4 phosphoenolpyruvate carboxylase (PEPC) was associated with photosynthesis and yield making it a selectable trait, along with leaf duration, particularly for stressful environments. Germplasm from the core collection was screened for tolerance to soils low in P and K, resulting in the identification of several accessions with good levels of tolerance. Cassava has a comparative advantage against major tropical food and energy crops in terms of biological productivity. Results also point to the importance of field research versus greenhouse or growth-chamber studies. In globally warming climate,the crop is predicted to play more role in tropical and subtropical agro-ecosystems. More research is needed under tropical field conditions to understand the interactive responses to elevated carbon dioxide, temperature, soil fertility, and plant water relations.

关键词： Abiotic Stress Agriculture Breeding Climate Change Cultivars Drought Ecophysiology Food Security Modeling Nutrients Photosynthesis Productivity Semiarid Soils Storage Roots Water Stress Yield

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A novel protection scheme for synchronous generator stator windings based on SVM

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Protection and Control of Modern Power Systems 2017年第1期2卷 257-268页

作者： magdi el-Saadawi Ahmed Hatata Mansoura University Faculty of Engineering MansouraEgypt

This paper proposes a novel scheme for detecting and classifying faults in stator windings of a synchronous generator(SG).The proposed scheme employs a new method for fault detection and classification based on Support Vector Machine(SVM).Two SVM classifiers are ***1 is used to identify the fault occurrence in the system and SVM2 is used to determine whether the fault,if any,is internal or *** this method,the detection and classification of faults are not affected by the fault type and location,pre-fault power,fault resistance or fault inception *** proposed method increases the ability of detecting the ground faults near the neutral terminal of the stator windings for generators with high impedance grounding neutral *** proposed scheme is compared with ANN-based method and gives faster response and better reliability for fault classification.

关键词： Support vector machine Artificial neural networks Synchronous generator Differential protection Fault detection Fault classification

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