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Association between acute peripancreatic fluid collections and early readmission in acute pancreatitis:A propensity-matched analysis

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World Journal of Experimental Medicine 2024年第2期14卷 75-88页

作者： Hassam ali Faisal Inayat Waqas Rasheed Arslan Afzal Ahtshamullah Chaudhry Pratik Patel Attiq Ur Rehman Muhammad Sajeel Anwar Gul Nawaz Muhammad Sohaib Afzal amir H Sohail Subanandhini Subramanium Dushyant Singh Dahiya Deepa Budh Babu P Mohan Douglas G Adler Department of Gastroenterology and Hepatology East Carolina University Brody School of MedicineGreenvilleNC 27834United States Department of Internal Medicine Allama Iqbal Medical CollegeLahorePunjab 54550Pakistan Department of Internal Medicine Texas Tech University Health Sciences CenterLubbockTX 79430United States Department of Internal Medicine St.Dominic’s HospitalJacksonMS 39216United States Department of Gastroenterology Mather Hospital and Hofstra University Zucker School of MedicinePort JeffersonNY 11777United States Department of Hepatology Geisinger Wyoming Valley Medical CenterWilkes-BarrePA 18711United States Department of Internal Medicine UHS Wilson Medical CenterJohnson CityNY 13790United States Department of Internal Medicine Louisiana State University HealthShreveportLA 71103United States Department of Surgery University of New Mexico School of MedicineAlbuquerqueNM 87106United States Division of Gastroenterology Hepatologyand MotilityThe University of Kansas School of MedicineKansas CityKS 64108United States Department of Internal Medicine St.Barnabas Hospital and Albert Einstein College of MedicineBronxNY 10457United States Department of Gastroenterology and Hepatology University of Utah School of MedicineSalt Lake CityUT 84132United States Center for Advanced Therapeutic Endoscopy Porter Adventist HospitalCentura HealthDenverCO 80210United States

BACKGROUND Patients with acute pancreatitis(AP)frequently experience hospital readmissions,posing a significant burden to healthcare *** peripancreatic fluid collection(APFC)may negatively impact the clinical course of *** could worsen symptoms and potentially lead to additional ***,clinical evidence regarding the specific association between APFC and early readmission in AP remains *** the link between APFC and readmission may help improve clinical care for AP patients and reduce healthcare *** To evaluate the association between APFC and 30-day readmission in patients with *** This retrospective cohort study is based on the Nationwide Readmission Database for *** with a primary diagnosis of AP were *** were categorized into those with and without APFC.A 1:1 propensity score matching for age,gender,and Elixhauser comorbidities was *** primary outcome was early readmission *** outcomes included the incidence of inpatient complications and healthcare *** analyses used Mann-Whitney U andχ2 tests,while Cox regression models assessed 30-day readmission risks and reported them as adjusted hazard ratios(aHR).Kaplan-Meier curves and log-rank tests verified readmission *** A total of 673059 patients with the principal diagnosis of AP were *** these,5.1%had APFC on initial *** propensity score matching,each cohort consisted of 33914 *** with APFC showed a higher incidence of inpatient complications,including septic shock(3.1%vs 1.3%,P<0.001),portal venous thrombosis(4.4%vs 0.8%,P<0.001),and mechanical ventilation(1.8%vs 0.9%,P<0.001).The length of stay(LOS)was longer for APFC patients[4(3-7)vs 3(2-5)days,P<0.001],as were hospital charges($29451 vs$24418,P<0.001).For 30-day readmissions,APFC patients had a higher rate(15.7%vs 6.5%,P<0.001)and a longer median readmission LOS(4 vs 3 days,P<0.001).The APF

关键词： Acute pancreatitis Acute peripancreatic fluid collections Readmission predictors Inpatient complications Healthcare utilization and costs

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Global trends in hepatitis C-related hepatocellular carcinoma mortality:A public database analysis(1999-2019)

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World Journal of Virology 2024年第1期13卷 69-83页

作者： Hassam ali Fnu Vikash Vishali Moond Fatima Khalid Abdur Rehman Jamil Dushyant Singh Dahiya amir Humza Sohail Manesh Kumar Gangwani Pratik Patel Sanjaya K Satapathy Department of Internal Medicine/Gastroenterology East Carolina University Brody School of MedicineGreenvilleNC 27834United States Department of Internal Medicine Jacobi Medical Center/Albert Einstein College of MedicineBronxNY 10461United States Department of Internal Medicine Saint Peter's University Hospital/Robert Wood Johnson Medical SchoolNew BrunswickNJ 08901United States Department of Internal Medicine Quaid-e-Azam Medical CollegeBahawalpur 63100PunjabPakistan Department of Internal Medicine Samaritan Medical CentreWatertownMA 13601United States Division of Gastroenterology Hepatology&MotilityThe University of Kansas School of MedicineKansas CityKS 66160United States Department of Surgery New York University Winthrop HospitalNew YorkMineloaNY 11501United States Department of Internal Medicine The University of ToledoToledoOH 43606United States Department of Gastroenterology Mather Hospital/Hofstra University Zucker School of MedicineNY 11777United States Division of Hepatology Department of MedicineNorth Shore University HospitalManhassetNY 11030United States

BACKGROUND Hepatitis C is the leading cause of chronic liver disease worldwide and it significantly contributes to the burden of hepatocellular carcinoma(HCC).However,there are marked variations in the incidence and mortality rates of HCC across different geographical *** the advent of new widely available treatment modalities,such as direct-acting antivirals,it is becoming increasingly imperative to understand the temporal and geographical trends in HCC mortality associated with Hepatitis ***,gender disparities in HCC mortality related to Hepatitis C are a crucial,yet underexplored aspect that adds to the disease's global *** some studies shed light on gender-specific trends,there is a lack of comprehensive data on global and regional mortality rates,particularly those highlighting gender *** gap in knowledge hinders the development of targeted interventions and resource allocation *** The results of our study show an overall decline in the mortality rates of patients with hepatitis C-related HCC over the last two ***,females exhibited a remarkable decrease in mortality compared to ***,East Asia and the Pacific displayed a significant decline in mortality,while Europe and Central Asia witnessed an upward *** America and the Caribbean also experienced an increase in mortality ***,no significant difference was observed in the Middle East and North *** America exhibited a notable upward *** Asia and Sub-Saharan Africa significantly declined throughout the study *** raises the hope of identifying areas for implementing more targeted *** some progress,multiple challenges remain in meeting the WHO 2030 goal of eliminating viral hepatitis[24].

关键词： Carcinoma Hepatocellular Antiviral agents Global Burden of Disease Quality indicators Health care Liver neoplasms Hepatitis C Chronic hepatitis C

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Fischer–Tropsch synthesis using Co and Co-Ru bifunctional nanocatalyst supported on carbon nanotube prepared via chemical reduction method

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Journal of Energy Chemistry 2019年第1期28卷 9-22页

作者： Jafar Shariati ali Haghtalab amir Mosayebi Department of Chemical Engineering Tarbiat Modares University Department of Chemical Engineering Tafresh University

We used a chemical reduction method to synthesize the catalysts of cobalt(Co) and cobalt-ruthenium(Co-Ru) bifunctional supported on carbon nanotubes(CNTs) for Fischer–Tropsch synthesis(FTS) in a fixedbed reactor. These Co-Ru/CNTs catalysts were synthesized with various weight proportions of Ru/Co(0.1 to 0.4 wt%) with keeping a fixed amount of cobalt(10 wt%). Moreover, for comparison purpose, CNTs supported Co-and Co(Ru)-based catalysts at same loading as the above catalysts were prepared through impregnation method. We characterize the present catalysts through the various techniques such as Energy–dispersive X-ray(EDX), Transmission Electron Microscopy(TEM), Brunauer–Emmett–Teller(BET),Hydrogen-Temperature-Programmed Reduction(H_2-TPR), Hydrogen-Temperature-Programmed Desorption(H_2-TPD) and O_2 titration. Thus using the chemical reduction method, a narrow particle size distribution was obtained so that the small cobalt particles were confined inside the CNTs. The Co-based catalyst prepared by impregnation was compared with the Co-Ru catalysts at the same loading. The results demonstrated that the use of chemical reduction method led to decrease the average Co oxide cluster size to8.7 nm so that the reduction enhanced about 24% and stabilized an earlier time at the stream. Among the prepared catalysts, the results indicated that the Co-Ru/CNTs catalysts demonstrated high catalytic activity with the highest long-chain hydrocarbons(C_(5+)), selectivity up to 74.76%, which was higher than those we obtained by the Co-Ru/γ-Al_2O_3(61._20%), Co/CNTs(43.68%) and Co/γ-Al_2O_3(37.69%). At the same time, comparing with those catalyst synthesized by impregnation, the use of chemical reduction led to enhancement of the C_(5+) selectivity from 59.30% to 68.83% and increment in FTS rate about 11% for the Co-Ru/CNTs catalyst.

关键词： Cobalt-ruthenium Carbon nanotubes Fischer-Tropsch synthesis Catalyst nanoparticles Chemical reduction method

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Incidence and predictors of hypocalcemia in end-stage renal disease patients on denosumab therapy: A systematic review and metaanalysis

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World Journal of Meta-Analysis 2024年第3期12卷 68-78页

作者： Abdul Hannan Siddiqui Misbah Shaikh Afia Salman Muhammad Ahmed ali Fahim Fizzah Batool Tahreem Mari Sarah Musani Muneeb Fareed Rooma Rehan Amna Hassni Urooj Nizami Ayesha amir Abdul Moeed Salim R Surani Department of Internal Medicine Dow University of Health SciencesKarachi 74200SindhPakistan Department of Medicine&Pharmacology Texas A&M UniversityCollege StationTX 77843United States

BACKGROUND Denosumab inhibits the receptor activator of nuclear factor *** markedly increases bone mineral density and has been proven to reduce the risk of ***,numerous adverse effects,notably hypocalcemia,are prevalent in patients with end-stage renal disease(ESRD).AIM To analyze the incidence and predictors of hypocalcemia caused by denosumab compared to control in patients with *** We conducted this study in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-analyses ***,Scopus,Cochrane Central,and EMBASE were systematically searched from inception through March *** original studies investigating the effects of denosumab on patients with ESRD compared to control were *** primary outcomes of our study were the incidence of mild,severe,and very severe *** outcomes included serum levels of intact parathyroid hormone,calcium,and *** results were pooled and analyzed using a random-effects *** Seven articles comprising 3240 patients were included in our *** treated with denosumab had a significantly increased incidence of mild hypocalcemia[risk ratio(RR):2.79;95%confidence interval(CI):0.99-7.91;P=0.05;I^(2)=37%]and of very severe hypocalcemia(RR:9.58;95%CI:1.58-57.98;P=0.01;I^(2)=49%).However,an increase in the occurrence of severe hypocalcemia was non-significant(RR:4.23;95%CI:0.47-38.34;P=0.20;I^(2)=96%).Alternatively,denosumab showed a significant decrease in serum intact parathyroid hormone[mean difference(MD):-433.20,95%CI:-775.12 to-91.28,I2=98%,P=0.01],while there was a non-significant decrease in phosphate(MD:-0.47,95%CI:-1.35 to 0.41,I^(2)=88%,P=0.30)and calcium levels(MD:-0.33,95%CI:-0.95 to 0.29,I^(2)=94%,P=0.29).CONCLUSION Our study demonstrated that denosumab is significantly associated with mild and very severe hypocalcemia in patients with ESRD making it necessary to detect and prevent this side effect of treatmen

关键词： Denosumab End-stage renal disease Hypocalcemia Parathyroid hormone Dialysis

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Improvement of microstructure and corrosion properties of friction stir welded AA5754 by adding Zn interlayer

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International Journal of Minerals,Metallurgy and Materials 2018年第8期25卷 967-973页

作者： ali Shamsipur amir Anvari Ahmad Keyvani Department of Mining and Metallurgical Engineering Amirkabir University of Technology School of Metallurgy and Materials Engineering Faculty of Technology and EngineeringShahrekord University

This study investigated the effect of Zn foil layers on the microstructure and corrosion characteristics of friction stir welded aluminum alloy *** of various joints were prepared by applying different rotational and welding speeds,and their microstructures were evaluated via a metallographic technique and scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy elemental *** anticorrosion behavior of joints in the absence and presence of a Zn interlayer was studied by cyclic potentiodynamic polarization test in 3.5 wt% Na Cl aqueous solution,and sound welds were obtained in the presence of the Zn interlayer *** results revealed that the joint made at a rotational speed of 800 r/min and traveling speed of 15 mm/min achieved a chemical composition identical to that of aluminum alloy 7 xxx series,and as such,it showed the best resistance to corrosion.

关键词： friction stir welding AA5754 aluminum alloy zinc interlayer microstructure corrosion resistance

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Hot deformation behavior of microstructural constituents in a duplex stainless steel during high-temperature straining

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International Journal of Minerals,Metallurgy and Materials 2013年第10期20卷 953-960页

作者： amir Momeni Shahab Kazemi ali Bahrani Materials Science and Engineering Department Hamedan University of Technology Department of Materials Engineering Faculty of EngineeringBu Ali Sina University

The hot deformation characteristics of 1.4462 duplex stainless steel （DSS） were analyzed by considering strain partitioning between austenite and ferrite constituents. The individual behavior of ferrite and austenite in microstructure was studied in an iso-stress condition. Hot compression tests were performed at temperatures of 800-1100~C and strain rates of 0.001-1 s-1. The flow stress was modeled by a hyperbolic sine constitutive equation, the corresponding constants and apparent activation energies were determined for the studied alloys. The constitutive equation and law of mixture were used to measure the contribution factor of each phase at any given strain. It is found that the contribution factor of ferrite exponentially declines as the Zener-HoUomon parameter （Z） increases. On the contrary, the austenite contribution polynomially increases with the increase of Z. At low Z values below 2.6. x 1015 （lnZ---35.5）, a negative contribution factor is determined for austenite that is attributed to dynamic recrystallization. At high Z values, the contribution factor of austenite is about two orders of magnitude greater than that of ferrite, and therefore, austenite can accommodate more strain. Microstructural characterization via electron back-scattered diffraction （EBSD） confirms the mechanical results and shows that austenite recrystallization is possible only at high temperature and low strain rate.

关键词： duplex stainless steel compression testing strain partitioning high temperature operations deformation

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Resilient Fixed-Order Distributed Dynamic Output Feedback Load Frequency Control Design for Interconnected Multi-Area Power Systems

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IEEE/CAA Journal of Automatica Sinica 2019年第5期6卷 1139-1151页

作者： ali Azarbahram amir Amini Mahdi Sojoodi the Department of Electrical and Computer Engineering Ferdowsi University of MashhadMashhadIran the Department of Electrical and Computer Engineering Concordia UniversityMontrealQCCanada the Faculty of Electrical and Computer Engineering Tarbiat Modares UniversityTehran14115-143Iran

The paper proposes a novel H∞ load frequency control(LFC) design method for multi-area power systems based on an integral-based non-fragile distributed fixed-order dynamic output feedback(DOF) tracking-regulator control scheme. To this end, we consider a nonlinear interconnected model for multiarea power systems which also include uncertainties and timevarying communication delays. The design procedure is formulated using semi-definite programming and linear matrix inequality(LMI) method. The solution of the proposed LMIs returns necessary parameters for the tracking controllers such that the impact of model uncertainty and load disturbances are minimized. The proposed controllers are capable of receiving all or part of subsystems information, whereas the outputs of each controller are local. These controllers are designed such that the resilient stability of the overall closed-loop system is guaranteed. Simulation results are provided to verify the effectiveness of the proposed scheme. Simulation results quantify that the distributed(and decentralized) controlled system behaves well in presence of large parameter perturbations and random disturbances on the power system.

关键词： Dynamic output feedback control interconnected multi-area power systems load frequency control linear matrix inequalities power system control

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Early versus delayed necrosectomy in pancreatic necrosis:A population-based cohort study on readmission,healthcare utilization,and in-hospital mortality

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World Journal of Methodology 2024年第3期14卷 55-67页

作者： Hassam ali Faisal Inayat Vinay Jahagirdar Fouad Jaber Arslan Afzal Pratik Patel Hamza Tahir Muhammad Sajeel Anwar Attiq Ur Rehman Muhammad Sarfraz Ahtshamullah Chaudhry Gul Nawaz Dushyant Singh Dahiya amir H Sohail Muhammad Aziz Division of Gastroenterology and Hepatology East Carolina University Brody School of MedicineGreenvilleNC 27834United States Department of Internal Medicine Allama Iqbal Medical CollegeLahorePunjab 54550Pakistan Department of Internal Medicine University of Missouri-Kansas CityKansas CityMO 64108United States Division of Gastroenterology Mather Hospital and Zucker School of Medicine at Hofstra UniversityPort JeffersonNY 11777United States Department of Internal Medicine Jefferson Einstein HospitalPhiladelphiaPA 19141United States Department of Internal Medicine UHS Wilson Medical CenterJohnson CityNY 13790United States Division of Gastroenterology and Hepatology Geisinger Wyoming Valley Medical CenterWilkes-BarrePA 18711United States Department of Internal Medicine St.Dominic's HospitalJacksonMS 39216United States Division of Gastroenterology Hepatologyand MotilityThe University of Kansas School of MedicineKansas CityKS 66160United States Department of Surgery University of New Mexico School of MedicineAlbuquerqueNM 87106United States Division of Gastroenterology and Hepatology The University of ToledoToledoOH 43606United States

BACKGROUND Acute necrotizing pancreatitis is a severe and life-threatening *** poses a considerable challenge for clinicians due to its complex nature and the high risk of *** minimally invasive and open necrosectomy procedures have been *** advancements in treatment modalities,the optimal timing to perform necrosectomy lacks *** To evaluate the impact of necrosectomy timing on patients with pancreatic necrosis in the United *** A national retrospective cohort study was conducted using the 2016-2019 Nationwide Readmissions *** with non-elective admissions for pancreatic necrosis were *** participants were divided into two groups based on the necrosectomy timing:The early group received intervention within 48 hours,whereas the delayed group underwent the procedure after 48 *** various intervention techniques included endoscopic,percutaneous,or surgical *** major outcomes of interest were 30-day readmission rates,healthcare utilization,and inpatient *** A total of 1309 patients with pancreatic necrosis were *** propensity score matching,349 cases treated with early necrosectomy were matched to 375 controls who received delayed *** early cohort had a 30-day readmission rate of 8.6% compared to 4.8%in the delayed cohort(P=0.040).Early necrosectomy had lower rates of mechanical ventilation(2.9%vs 10.9%,Pality(1.1%vs 4.3%,P=0.01).Patients in the early intervention group incurred lower healthcare costs,with median total charges of $52202 compared to$147418 in the delayed *** in the early cohort also had a relatively shorter median length of stay(6 vs 16 days,P<0.001).The timing of necrosectomy did not significantly influence the risk of 30-day readmission,with a hazard ratio of 0.56(95%confidence interval:0.31-1.02,P=0.06).CONCLUSION Our findings show that

关键词： Acute necrotizing pancreatitis Pancreatic necrosis Early necrosectomy Delayed necrosectomy Readmission,Healthcare costs Mortality

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Processing of nanostructured metallic matrix composites by a modified accumulative roll bonding method with structural and mechanical considerations

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International Journal of Minerals,Metallurgy and Materials 2012年第10期19卷 951-956页

作者： amir Hossein Yaghtin Erfan Salahinejad ali Khosravifard Department of Materials Science and Engineering(Shiraz Branch) Islamic Azad UniversityShiraz 71955Iran Department of Materials Science and Engineering School of EngineeringShiraz UniversityShiraz ***Iran

Particulate reinforced metallic matrix composites have attracted considerable attention due to their lightweight, high strength, high specific modulus, and good wear resistance. A1/B4C composite strips were produced in this work by a modified accumulative roll bonding process where the strips were rotated 90° around the normal direction between successive passes. Transmission electron microscopy and X-ray diffraction analyses reveal the development of nanostructures in the Al matrix after seven passes. It is found that the B4C reinforcement distribution in the matrix is improved by progression of the process. Additionally, the tensile yield strength and elongation of the processed materials are increased with the increase of passes.

关键词： metallic matrix composites particle reinforced composites nanostructures aluminum boron carbide roll bonding tensile properties

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Insights into kinetic inhibition effects of MEG,PVP,and L-tyrosine aqueous solutions on natural gas hydrate formation

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Petroleum Science 2021年第2期18卷 495-508页

作者： amir Saberi Abdolmohammad Alamdari ali Rasoolzadeh amir H.Mohammadi Department of Natural Gas Engineering School of Chemical and Petroleum EngineeringShiraz UniversityShiraz71345Iran Department of Process Engineering National Iranian Gas Company(NIGC)South Pars Gas Complex(SPGC)Phases 4&5Bushehr75391/311Iran Discipline of Chemical Engineering School of EngineeringUniversity of KwaZulu-NatalHoward College CampusKing George V AvenueDurban4041South Africa

It is necessary to understand all the prerequisites, which result in gas hydrate formation for safe design and control of a variety of processes in petroleum industry. Thermodynamic hydrate inhibitors (THIs) are normally used to preclude gas hydrate formation by shifting hydrate stability region to lower temperatures and higher pressures. Sometimes, it is difficult to avoid hydrate formation and hydrates will form anyway. In this situation, kinetic hydrate inhibitors (KHIs) can be used to postpone formation of gas hydrates by retarding hydrate nucleation and growth rate. In this study, two kinetic parameters including natural gas hydrate formation induction time and the rate of gas consumption were experimentally investigated in the presence of monoethylene glycol (MEG), L-tyrosine, and polyvinylpyrrolidone (PVP) at various concentrations in aqueous solutions. Since hydrate formation is a stochastic phenomenon, the repeatability of each kinetic parameter was evaluated several times and the average values for the hydrate formation induction times and the rates of gas consumption are reported. The results indicate that from the view point of hydrate formation induction time, 2 wt% PVP and 20 wt% MEG aqueous solutions have the highest values and are the best choices. It is also interpreted from the results that from the view point of the rate of gas consumption, 20 wt% MEG aqueous solution yields the lowest value and is the best choice. Finally, it is concluded that the combination of PVP and MEG in an aqueous solution has a simultaneous synergistic impact on natural gas hydrate formation induction time and the rate of gas consumption. Furthermore, a semi-empirical model based on chemical kinetic theory is applied to evaluate the hydrate formation induction time data. A good agreement between the experimental and calculated hydrate formation induction time data is observed.

关键词： Gas hydrate Clathrate hydrate Natural gas Kinetic hydrate inhibitor(KHI) Induction time Kinetics

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