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Impact of exercise on markers of B cell-related immunity:A systematic review

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Journal of Sport and Health Science 2024年第3期13卷 339-352,I0002页

作者： David Walzik Sergen Belen Karen Wilisch Marie Kupjetz Silvana Kirschke Tobias Esser Niklas Joisten Alexander schenk Sebastian Proschinger Philipp Zimmer Division of Performance and Health(Sports Medicine) Institute for Sport and Sport ScienceTU Dortmund UniversityDortmund 44227Germany

Background:B cells represent a crucial component of adaptive immunity that ensures long-term protection from infection by generating pathogen-specific *** alters B cell counts and immunoglobulin levels,but evidence-based conclusions on potential benefits for adaptive immunity are *** systematic review assessed current literatures on the impact of acute exercise and exercise training on B cells,immunoglobulins,and markers of secretory immunity in human ***:According to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA)guidelines,MEDLINE,Web of Science,and Embase were searched on March 8,***-randomized controlled trials and crossover trials investigating the impact of acute exercise or exercise training on B cell counts and proportions,immunoglobulin levels,salivary flow rate,or secretory immunoglobulin A secretion rate were *** and reporting of exercise training studies were assessed using the Tool for the Assessment of Study Quality and reporting in *** characteristics,outcome measures,and statistically significant changes were summarized ***:Of the 67 eligible studies,22 applied acute exercise and 45 applied exercise *** included outcomes revealed significant alterations over time in acute exercise and exercise training context,but only a few investigations showed significant differences compared to control *** and plasma immunoglobulin A levels were most consistently increased in response to exercise ***:B cell-related outcomes are altered by acute exercise and exercise training,but evidence-based conclusions cannot be drawn with high confidence due to the large heterogeneity in populations and exercise ***-designed trials with large sample sizes are needed to clarify how exercise shapes B cell-related immunity.

关键词： Antibody B-lymphocyte Exercise Humoral immunity Immune system

Editorial for special issue on hydrogen metallurgy

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International Journal of Minerals,Metallurgy and Materials 2022年第10期29卷 1817-1819页

作者： Jianliang Zhang Johannes schenk Zhengjian Liu Kejiang Li School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Department of Metallurgy Chair of Ferrous MetallurgyMontanuniversität LeobenFranz-Josef Straße 188700 LeobenAustria

*** The carbon neutral strategy is promoting the transformation and upgrading of the traditional metallurgical industry,and the high-quality and low-carbon reform of the metallurgical industry is ***,as a clean energy... 详细信息

关键词： upgrading metallurgy industry

Fluidization behavior and reduction kinetics of pre-oxidized magnetite-based iron ore in a hydrogen-induced fluidized bed

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International Journal of Minerals,Metallurgy and Materials 2022年第10期29卷 1873-1881页

作者： Heng Zheng Oday Daghagheleh Thomas Wolfinger Bernd Taferner Johannes schenk Runsheng Xu Chair of Ferrous Metallurgy Montanuniversitaet LeobenFranz-Josef-Straβe 188700LeobenAustria K1-MET GmbH Stahlstraße 144020 LinzAustria The State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The influence of different pre-oxidation temperatures and pre-oxidation degrees on the reduction and fluidization behaviors of magnetite-based iron ore was investigated in a hydrogen-induced fluidized *** raw magnetite-based iron ore was pre-oxidized at 800 and1000℃ for a certain time to reach a partly oxidation and deeply oxidation *** structure and morphology of the reduced particles were analyzed via optical microscope and scanning electron microscopy(SEM).The reaction kinetic mechanism was determined based on the double-logarithm *** results indicate that the materials with higher oxidation temperature and wider particle size range show better fluidization *** lower oxidation temperature is more beneficial for the reduction rate,especially in the later reduction *** pre-oxidation degree shows no obvious influence on the fluidization and reduction *** on the kinetic analysis,the reduction progress can be divided into three *** reduction mechanism was discussed combing the surface morphology and phase structure.

关键词： magnetite-based iron ore prior oxidation fluidization behavior kinetic analysis hydrogen reduction

Recent status of fluidized bed technologies for producing iron input materials for steelmaking

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Particuology 2011年第1期9卷 14-23页

作者： Johannes Leopold schenk Department of Metallurgy University of Leoben Franz-Josef-Straβe 18 A-8700 Leoben Austria

Today steel is produced by two steelmaking processes, the basic oxygen furnace and the electric arc furnace, Three types of iron input materials for both processes are liquid hot metal or in solidified form as pig iron, direct reduced iron （DRI） and hot briquetted iron （HB1） as well as steel scrap. Hot metal, pig iron, DRI and HBI are virgin iron materials, which have to be produced from iron ore by the so-called ironmaking technologies. New ironmaking processes based on fluidized bed technology have been developed in the last two decades. The main advantage of these technologies is that fine ore can be directly used in the processes and prior treatment such as sintering or pelletizing can be avoided which is required for the established processes. Theoretical aspects for reduction of fine iron oxides in a fluidized bed reactor system will be explained. The fluidized bed reducing technologies utilized in the most advanced new ironmaking processes for direct use of fine ore, FINMET, Circored, FINEX~ and Hismelt will be compared.

关键词： FINEX  Circored  FINMET  HIsmelt  Fluidized bed Reactor Fine iron ore Ironmaking

Fluidization behavior and reducibility of iron ore fines during hydrogen-induced fluidized bed reduction

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Particuology 2020年第5期18卷 36-46页

作者： Daniel Spreitzer Johannes schenk Chair of Ferrous Metallurgy Montanuniversitaet LeobenFranz-Josef-Straβe 188700 LeobenAustria

A laboratory fluidized bed reactor was used to investigate the fluidization behavior and reducibility of various iron ore *** was chosen as a reducing agent across a temperature range of 873-1073 *** magnetite ore used exhibited strong sticking behavior after the initiation of metallic iron *** other tested ores fluidized sufficiently well when subjected to the same high reduction *** kinetic analysis was conducted using a previously developed model to include three rate-limiting step *** trend of apparent activation energy was correlated with the degree of ***,the influence of varying the specific gas rate was *** results show the variation in reducibility as a result of different interactions,which influence the rate-limiting mechanisms of nucleation and the undertaken chemical reactions,which vary as a function of temperature and degree of *** apparent activation energies,determined from the reduction of wtistite to metallic iron,were in the range of 15-60 kJ/mol,depending on the iron ore used and the degree of *** change in apparent activation energy deriving from the increased specific gas rate can be explained by an increasing nucleation effect,especially at lower reduction temperatures.

关键词： Fluidized bed Iron ore reduction Hydrogen Fluidization behavior Kinetic analysis

The push-pull principle:an electrostatic actuator concept for low distortion acoustic transducers

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Microsystems & Nanoengineering 2022年第6期8卷 181-194页

作者： Bert Kaiser Hermann A.G.schenk Lutz Ehrig Franziska Wall Jorge M.Monsalve Sergiu Langa Michael Stolz Anton Melnikov Holger Conrad David Schuffenhauer Harald schenk Fraunhofer Institute for Photonic Microsystems IPMS DresdenGermany Arioso Systems GmbH since Sep.1st 2022:BOSCH Sensortec GmbHDresdenGermany Chair of Micro and Nano Systems Brandenburg University of Technology Cottbus-SenftenbergCottbusGermany

Electrostatic actuators are of particular interest for microsystems(MEMS),and in particular for MEMS audio transducers for use in advanced true wireless *** are attractive because of their typically low electrical capacitance and because they can be fabricated from materials that are compatible with standard complementary metal-oxide semiconductor(CMOS)*** high audio performance and in particular low harmonic distortion(THD)the implementation of the push-pull principle provides strong *** an arrangement of three electrodes in a conjunct moving configuration on a beam,we demonstrate here for the first time a balanced bending actuator incarnating the push-pull principle operating at low *** first design already exhibits a harmonic distortion as low as 1.2%at 79 dB using a signal voltage of only 6 V_(p) and a constant voltage of only±10 V_(dc) in a standard acoustic measurement ***,exceeding our previously reported approach in all three key performance indications at the same *** expect that our novel electrode configurations will stimulate innovative electrostatic actuator developments for a broad range of *** this paper we report the basic theory,the fabrication and the performance of our novel actuator design acting as an audio transducer.

关键词： distortion push electrostatic

Numerical Modelling of the Powder Metallurgical Manufacturing Chain of High Strength Sintered Gears

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Chinese Journal of Mechanical Engineering 2021年第6期34卷 3-20页

作者： Ali Rajaei Yuanbin Deng Oliver schenk Soheil Rooein Alexander Bezold Christoph Broeckmann Institute for Materials Applications in Mechanical Engineering(IWM)of RWTH Aachen University Augustinerbach 452062 AachenGermany

This paper presents a digital model for the powder metallurgical(PM)production chain of high-performance sintered gears based on an integrated computational materials engineering(ICME)*** and finite element methods(DEM and FEM)were combined to describe the macroscopic material response to the thermomechanical loads and process conditions during the entire production *** microstructural evolution during the sintering process was predicted on the meso-scale using a Monte-Carlo *** effective elastic properties were determined by a homogenization method based on modelling a representative volume element(RVE).The results were subsequently used for the FE modelling of the heat treatment *** the development of multi-scale models,it was possible obtain characteristics of the microstructural *** predicted hardness and residual stress distributions allowed the calculation of the tooth root load bearing capacity of the heat-treated sintered gears.

关键词： ICME Process chain Powder metallurgy Multiscale modelling and simulation Digital model Sintered gear

Digital filmmaking handbook 1st

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Porcine model characterizing various parameters assessing the outcome after acetaminophen intoxication induced acute liver failure

丛书名： Graphics Series

2000年

作者： Ben Long Sonja schenk

来源：畅想之星图书光盘版（南... 评论

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World Journal of Gastroenterology 2017年第9期23卷 1576-1585页

作者： Karolin Thiel Wilfried Klingert Kathrin Klingert matthias H Morgalla Martin U Schuhmann Pamela Leckie Yalda Sharifi Nathan A Davies Rajiv Jalan Andreas Peter Christian Grasshoff Alfred Konigsrainer Martin schenk Christian Thiel Department of General Visceral and Transplant SurgeryTuebingen University Hospital Department of Anaesthesiology Tuebingen University Hospital Department of Neurosurgery Tuebingen University Hospital Institute for Liver and Digestive Health University College London Division of Endocrinology DiabetologyAngiologyNephrologyPathobiochemistry and Clinical ChemistryDepartment of Internal MedicineTuebingen University Hospital

AIM To investigate the changes of hemodynamic and laboratory parameters during the course of acute liver failure following acetaminophen *** Eight pigs underwent a midline laparotomy following jejunal catheter placement for further acetaminophen intoxication and positioning of a portal vein Doppler flow-probe. Acute liver failure was realized by intrajejunal acetaminophen administration in six animals, two animals were sham operated. All animals were invasively monitored and received standardized intensive care support throughout the study. Portal blood flow, hemodynamic and ventilation parameters were continuously recorded. Laboratory parameters were analysed every eight hours. Liver biopsies were sampled every 24 h following intoxication and upon *** Acute liver failure (ALF) occurred after 28 ± 5 h resulted in multiple organ failure and death despite maximal support after further 21 ± 1 h (study end). Portal blood flow (baseline 1100 ± 156 m L/min) increased to a maximum flow of 1873 ± 175 m L/min at manifestation of ALF, which was significantly elevated(P 0.01).CONCLUSION Declining portal blood flow and subsequent severe thrombocytopenia after acetaminophen intoxication precede fatality in a porcine acute liver failure model.

关键词： Acetaminophen 沉醉尖锐的肝失败门血流动 Thrombocytopenia 动物模型猪的模型