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Reasons and effects of the decline of willing related potential living kidney donors

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World Journal of Transplantation 2023年第5期13卷 276-289页

作者： Rabea Ahmed Gadelkareem Amr mostafa Abdelgawad Nasreldin Mohammed Ahmed Reda Nashwa mostafa Azoz Mohammed Ali Zarzour Hisham Mokhtar hammouda Mahmoud Khalil Department of Urology Assiut Urology and Nephrology HospitalFaculty of MedicineAssiut UniversityAssiut 71515Egypt Department of Internal Medicine-Nephrology Unit Assiut University HospitalFaculty of MedicineAssiut UniversityAssiut 71515Egypt

BACKGROUND Although the availability of related living donors(LDs)provides a better chance for receiving kidney transplantation(KT),the evaluation protocols for LD selection remain a safeguard for the LD’s *** protocols are variable from one center to another,resulting in variable rates of decline of the potential LDs(PLDs).The decline of willing PLDs may occur at any stage of evaluation,starting from the initial contact and counseling to the day of *** To identify the causes of the decline of PLDs,the predictors of PLD candidacy,and the effect on achieving *** A retrospective study was performed on the willing PLDs who attended our outpatient clinic for kidney donation to their related potential recipients between October 2015 and December *** variables influencing their candidacy rate and the fate of their potential recipients were *** groups of PLDs were compared:Candidate PLDs after a completed evaluation vs non-candidate PLDs with a complete or incomplete evaluation.A multivariate logistic regression was performed to assess the factors contributing to the achievement of PLD *** Of 321 willing PLDs,257 PLDs(80.1%)accessed the evaluation to variable extents for 212 potential recipients,with a mean age(range)of 40.5±10.4(18-65)years,including 169 females(65.8%).The remaining 64 PLDs(19.9%)did not access the *** 58 PLDs(18.1%)succeeded in donating,but 199 PDLs(62.0%)were declined;exclusion occurred in 144 PLDs(56.0%)for immunological causes(37.5%),medical causes(54.9%),combined causes(9.7%),and financial causes(2.1%).Regression and release occurred in 55 PLDs(17.1%).The potential recipients with candidate PLDs were not significantly different from those with non-candidate PLDs,except in age(P=0.041),rates of completed evaluation,and exclusion of PLDs(P<0.001).There were no factors that independently influenced the rate of PLD *** patients who failed to have KT after the decline of their P

关键词： Donor decline Donor evaluation Donor exclusion Kidney transplantation Living kidney donors Related living donors

Preemptive living donor kidney transplantation:Access,fate,and review of the status in

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World Journal of Nephrology 2023年第3期12卷 40-55页

作者： Rabea Ahmed Gadelkareem Amr mostafa Abdelgawad Ahmed Reda Nashwa mostafa Azoz Mohammed Ali Zarzour Nasreldin Mohammed Hisham Mokhtar hammouda Mahmoud Khalil Department of Urology Assiut Urology and Nephrology HospitalFaculty of MedicineAssiut UniversityAssiut 71515Egypt Department of Internal Medicine Assiut University HospitalFaculty of MedicineAssiut UniversityAssiut 71515Egypt

BACKGROUND Preemptive living donor kidney transplantation(PLDKT)is recommended as the optimal treatment for end-stage renal *** To assess the rate of PLDKT among patients who accessed KT in our center and review the status of PLDKT in *** We performed a retrospective review of the patients who accessed KT in our center from November 2015 to November *** addition,the PLDKT status in Egypt was reviewed relative to the *** Of the 304 patients who accessed KT,32 patients(10.5%)had preemptive access to KT(PAKT).The means of age and estimated glomerular filtration rate were 31.7±13 years and 12.8±3.5 mL/min/1.73 m2,***-nine patients had KT,including 3 PLDKTs only(5.1%of total KTs and 9.4%of PAKT).Twenty-nine patients(90.6%)failed to receive PLDKT due to donor unavailability(25%),exclusion(28.6%),regression from donation(3.6%),and patient regression on starting dialysis(39.3%).In multivariate analysis,known primary kidney disease(P=0.002),patient age(P=0.031)and sex(P=0.001)were independent predictors of achievement of KT in our ***,PAKT was not significantly(P=0.065)associated with the achievement of *** of the literature revealed lower rates of PLDKT in Egypt than those in the *** Patient age,sex,and primary kidney disease are independent predictors of achieving living donor *** its non-significant effect,PAKT may enhance the low rates of *** main causes of non-achievement of PLDKT were patient regression on starting regular dialysis and donor unavailability or exclusion.

关键词： Access to kidney transplantation Donor regression Kidney transplantation Living donors Preemptive kidney transplantation Transplantation

Catalytic behaviors of Co-Mn/TiO_2 catalysts for Fischer-Tropsch synthesis

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燃料化学学报 2012年第12期40卷 1435-1443页

作者： mostafa Feyzi Faculty of Chemistry Razi UniversityKermanshahIran

The 15%(Co-Mn)/TiO2,(Co/Mn=1/6) catalyst was prepared using fusion procedure and studied for the conversion of synthesis gas to C2 ～ 4 *** effects of calcination conditions and operation conditions such as the H 2 / CO molar feed ratio at different temperatures,gas hourly space velocity(GHSV) and total reaction pressure on the catalytic performance of catalyst were *** stability of the catalyst during 150 h at optimal operation conditions(t = 250℃ H2 /CO= 2/1,GHSV=1 500 h-1 and p =0.3 MPa) has been *** is found that this catalyst is high stable for production C2 ～ 4 *** of both precursors and calcined catalysts by powder X-ray diffraction,scanning electron microscopy(SEM),Brunauer-Emmett-Teller(BET) specific surface area measurement and thermal analysis methods such as thermal gravimetric analysis(TGA) and differential scanning calorimetry(DSC) show that the different preparation method influences the catalyst precursor structure and morphology.

关键词：气化理论燃料化学研究发展

Geochemical and mineralogical characteristics of some gold mine tailings in the Eastern Desert of Egypt

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Frontiers of Earth Science 2022年第4期16卷 906-915页

作者： mostafa REDWAN Geology Department Faculty of ScienceSohag UniversitySohag 82524Egypt

The adverse environmental effects of mine tailings disposal on the surrounding ecosystems are world-wide environmental *** to environmental issues related to tailings discharged on land surface,detailed tailings characterization is a prerequisite for a long-term management *** tailings from four gold mines in Egypt,namely Fatira,El Sid,Barramiya,and Atud were investigated for their geochemical-mineralogical features and the effect of weathering behavior on the release of their heavy *** tailings samples were investigated by mineralogical(XRD and ESEM-EDS),physical(grain-size distribution)and geochemical(XRF)*** of the tailings have uniform silt-size with fine to very finesand and *** tailings have coarse to fine *** carbonate,predominantly calcite was found for the samples from Fatira and Atud,calcite-ankerite from El Sid and dolomite from Barramiya with little ***-mean of Cr(569287 mg/kg),Ni(89191 mg/kg)and Co(4221 mg/kg)values are coinciding with the ultramafic nature in Atud and Barramiya *** Sid tailings have a high-mean concentration of Zn(1357 mg/kg)and Pb(1349 mg/kg).Barramiya tailings have a high-mean As concentration(2635 mg/kg).The Fatira tailings are characterized by high-mean values of Sr(444 mg/kg)and Cu(280 mg/kg)arising from auriferous *** Sr concentrations in Fatira tailings are mainly due to its adsorption to iron *** oxidation is conceded along the cracks and/or the edges of the crystals in the El Sid,Barramiya and Atud *** Threshold Effect Level(TEL)values indicated high contamination from heavy elements to the neighboring *** tailings were deposited downstream into the small *** and water erosion can dissolve efflorescent materials enriched in toxic elements like As,Zn,and Pb at tailings *** release of contaminants could be catastrophic for the environment without mine site rehabilitation strategies.

关键词： gold mine tailings geochemistry mineralogy Egypt

Cooperative distributed state estimation:resilient topologies against smart spoofers

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Control Theory and Technology 2022年第4期20卷 488-503页

作者： mostafa Safi Amirkabir University of Technology HafezTehran 424Iran

A network of observers is considered,where through asynchronous(with bounded delay)communications,they cooperatively estimate the states of a linear time-invariant(LTI)*** such a setting,a new type of adversary might affect the observation process by impersonating the identity of the regular node,which is a violation of communication *** adversaries also inherit the capabilities of Byzantine nodes,making them more powerful threats called smart *** show how asynchronous networks are vulnerable to smart spoofing *** the estimation scheme considered in this paper,information flows from the sets of source nodes,which can detect a portion of the state variables each,to the other follower *** regular nodes,to avoid being misguided by the threats,distributively filter the extreme values received from the nodes in their *** conditions based on strong robustness are proposed to guarantee the *** simulation scenarios are provided to verify the results.

关键词： Cyber-physical systems Smart spoofing Distributed resilient algorithm Secure observers

Non-linear Semigroup of a Class of Abstract Semilinear Functional Differential Equations with a Non-Dense Domain

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Acta Mathematica Sinica,English Series 2004年第5期20卷 933-942页

作者： mostafa ADIMY mostafa LAKLACH Khalil EZZINBI Département de Mathématiques Appliquées U RS 2055 C.N.R.SUniversité de PauAvenue de l'Université64000 PauFrance Département de Mathématiques Faculté des Sciences SemlaliaB.P.2390MarrakeshMorocco

In this work,we are concerned with a general class of abstract semilinear autonomous functional differential equations with a non-dense domain on a Banach *** objective is to study,using the Crandall-Liggett approach,... 详细信息

关键词： Non-linear semigroup Semilinear functional differential equation Hille-Yosida operator Crandall-Ligget t approach

Nucleic Acid Metabolism, Proline Concentration and Antioxidants Enzyme Activity in Canola (Brassica nupus L.) Under Salinity Stress

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Agricultural Sciences in China 2010年第4期9卷 504-511页

作者： mostafa Heidari Department of Agronomy and Plant Breeding University of ZabolZabol P.O. Box 98615-538 Iran

Seedling of five canola genotypes, Hyola 308, Hyola 401, Hyola 60, Option 50 and RGS003, were grown in Hoagland nutrient solution containing S1 = 0, S2 = 100, S3 = 200 and S4 = 300 mmol L-1 NaCl in controlled environment. Proline, antioxidant activities like catalase （CAT）, ascobrate peroxidase （APX） and guaiacol peroxidase （GPX） and some enzyme activities of nucleic acid metabolism were determined in shoot and root 20 days after induction of salinity stress. Results showed application of stress significantly affected plant growth components such as fresh （FW） and dry weight （DW） of canola genotypes. Among the genotypes, RGS003 had the highest reduction of FW and DW in S3 treatment. By increasing NaCl levels from 0 to 300 mmol L-1, the activity of two antioxidant enzymes （APX and CAT） in shoot and root increased but GPX in all of genotypes decreased. The increase in salinity stress, increased proline concentration in both root and shoot tissues of canola genotypes. Hyola 401 genotype had the maximum concentration of proline in root and shoot in S3 treatment. Along with increased salinity stress in all of the studied plants, salinity significantly increased the level of the total nucleic acid and the activity of DNase I in all of salinity treatments and at the S3 level, RGS003 had the maximum concentration of nucleolytic enzyme.

关键词： antioxidant activity proline salinity nucleolytic enzyme canola

Hybrid Physics and Data-driven Contingency Filtering for Security Operation of Micro Energy-water Nexus

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CSEE Journal of Power and Energy Systems 2023年第5期9卷 1820-1831页

作者： mostafa Goodarzi Qifeng Li the Department of Electrical and Computer Engineering University of Central FloridaOrlandoFL 32816 USA

This paper investigates a novel engineering problem,i.e.,security-constrained multi-period operation of micro energywater *** problem is computationally challenging because of its high nonlinearity,nonconvexity,and large *** propose a two-stage iterative algorithm employing a hybrid physics and data-driven contingency filtering(CF)method and convexification to solve *** convexified master problem is solved in the first stage by considering the base case operation and binding contingencies set(BCS).The second stage updates BCS using physics-based data-driven methods,which include dynamic and filtered data *** method is faster than existing CF methods because it relies on offline optimization problems and contains a limited number of online optimization *** validate effectiveness of the proposed method using two different case studies:the IEEE 13-bus power system with the EPANET 8-node water system and the IEEE 33-bus power system with the Otsfeld 13-node water system.

关键词： Contingency filtering micro energy-water nexus multi-period secure operation optimal power and water flow physics-guided data-driven

Characteristics Study on Bi-Pb Based Alloys Quenched from Melt

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Journal of Materials Science & Technology 2009年第4期25卷 449-453页

作者： Rizk mostafa Shalaby Metal Physics Laboratory Physics DepartmentFaculty of ScienceMansoura University

Three different bismuth-lead systems namely, Wood＇s alloy （Bi50Pb25Sn12.5Cd12.5）, Newton＇s alloy （Bi50Pb31.2Sn18.8） and Rose＇s alloy （B50Pb28Sn22）, with one used as fusible alloys were quenched from melt by melt spinning technique. Thermal analysis, structure and mechanical properties of all alloys have been studied and analyzed. From X-ray diffraction analysis, an intermetallic compound phase, designated Pb7Bi3 is detected. The formation of an intermetallic compound phase causes a pronounced increase in the electrical resistivity. The Wood＇s alloy containing-cadmium exhibits mechanical properties superior to both the Newton＇s and Rose＇s alloys. The presence of cadmium in Wood＇s alloy decreases its melting point. Wood＇s alloy has better properties, which make it useful in various applications such as in protection shields for radiotherapy, locking of mechanical devices and welding at low temperature.

关键词： Thermal properties Electrical resistivity Mechanical properties Radiotherapy and fusible alloys