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An uncommon cause of hypoxemia： platypnea-orthodeoxia syndrome

作者： Gertraud gregor

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Journal of Geriatric Cardiology 2015年第5期12卷 584-587页

作者： Sandra Schmid gregor John Leonard Mossaz Vassili Choutko Department of Internal medicine Rehabilitation and Geriatrics Geneva University Hospitals (HUG) Geneva Switzerland Department of Internal medicine Hopital neuchdtelois La Chaux-de-Fonds Switzerland Unit of Cardiology Geneva University Hospitals (HUG) Geneva Switzerland

Platypnea-onhodeoxia syndrome （POS） describes a clinical entity of arterial hypoxemia in the upright position associated with dyspnoea, which is relieved by recumbency. The syndrome is caused by an intracardiac or intrapulmonary shunt, or ventilation-perfusion mismatching. We describe here the first case of resolving/relapsing POS induced by intracardiac right-to-left shunting that was partly dependent on volume overload.

关键词： Intracardiac shunt Patent foramen ovale Platypnea-orthodeoxia syndrome

Phylogenetic relationship and genetic differentiation of Populus caspica and Populus alba using cpDNA and ITS noncoding sequences

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Journal of Forestry research 2019年第2期30卷 451-461页

作者： Hamed Yousefzadeh Abasalt Hosseinzadeh Colagar Effat Yousefi Maryam Badbar gregor Kozlowski Department of Environmental Science Faculty of Natural Resources Tarbiat Modares University Department of Molecular and Cell Biology Faculty of Basic Science University of Mazandaran Department of Biology and Botanic Garden University of Fribourg

Populus caspica Bornm.(section Leuce and subsection Albida), one of the most endangered endemic tree species in the Hyrcanian Forest in Iran, has num.rous morphological characteristics that are closely similar to Populus alba; to clarify their taxonomic relatedness and genetic differentiation and thus inform conservation strategies, we used the noncoding regions of chloroplast DNA(cpDNA; trnL-F and trnH-psbA) and the internal transcribed spacer(ITS). Leaf samples were collected from six populations across northern Iran. cpDNA and ITS fragments were amplified by universal primers using the PCr technique and directed sequencing. The results showed that P. caspica is genetically differentiated from ***, and two ITS variants were detected within some *** individuals. Conflicts between topologies from ITS and plastid genomes were observed. High differentiation of P. caspica from the other Populus species shown in this study confirmed the diverging taxonomic status of this endangered species. We recommend in situ conservation measures(e.g., protected areas) for at least several populations of this species, especially in the plain regions of the Hyrcanian forest.

关键词： Endangered endemic species DNA barcoding Hyrcanian forest Taxonomic status

A Causality-guided Statistical Approach for Modeling Extreme Mei-yu rainfall Based on Known Large-scale Modes——A Pilot Study

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Advances in Atmospheric Sciences 2022年第11期39卷 1925-1940页

作者： Kelvin S.NG gregor C.LECKEBUSCH Kevin I.HODGES School of Geography Earth and Environmental SciencesUniversity of BirminghamBirmingham B152TTUnited Kingdom Department of Meteorology and NCAS University of ReadingReading RG66BBUnited Kingdom

Extreme Mei-yu rainfall(MYr)can cause catastrophic impacts to the economic development and societal welfare in *** significant improvements have been made in climate models,they often struggle to simulate local-to-regional extreme rainfall(e.g.,MYr).Yet,large-scale climate modes(LSCMs)are relatively well represented in climate *** there exists a close relationship between MYr and various LSCMs,it might be possible to develop causality-guided statistical models for MYr prediction based on *** statistical models could then be applied to climate model simulations to improve the representation of MYr in climate *** this pilot study,it is demonstrated that skillful causality-guided statistical models for MYr can be constructed based on known *** relevancy of the selected predictors for statistical models are found to be consistent with the *** importance of temporal resolution in constructing statistical models for MYr is also shown and is in good agreement with the *** results demonstrate the reliability of the causality-guided approach in studying complex circulation systems such as the East Asian summer monsoon(EASM).Some limitations and possible improvements of the current approach are *** application of the causality-guided approach opens up a new possibility to uncover the complex interactions in the EASM in future studies.

关键词： extreme rainfall Mei-yu front causality-guided approach large-scale climate modes

PArTICLE COATING BY CHEMICAL VAPOr DEPOSITION IN A FLUIDIZED BED rEACTOr

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China Particuology 2005年第1期3卷 105-112页

作者： gregor Czok Joachim Werther Department of Chemical Engineering I Technical University Hamburg-Harburg Germany

Aluminum coatings were created onto glass beads by chemical vapor deposition in a fluidized bed reactor at different temperatures. Nitrogen was enriched with Triisobutylaluminum (TIBA) vapor and the latter was thermally decomposed inside the fluidized bed to deposit the elemental aluminum. To ensure homogeneous coating on the bed material, the fluidizing conditions necessary to avoid agglomeration were investigated for a broad range of temperatures. The deposition reaction was modeled on the basis of a discrete particle simulation to gain insight into homogeneity and thickness of the coating throughout the bed material. In particular, the take-up of aluminum was traced for selected particles that exhibited a large mass of deposited aluminum.

关键词： chemical vapor deposition fluidized bed reactor particle coating

Post-testing measurement of freely movable and diffusible hydrogen in context of WEC formation at cylindrical roller thrust bearings from 100Cr6

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Friction 2021年第4期9卷 876-890页

作者： Martin LINZMAYEr Francisco GUTIÉrrEZ GUZMÁN gregor MANKE Georg JACOBS Christopher SOUS Michael POHL Institute for Machine Elements and System Engineering RWTH Aachen UniversitySchinkelstrasse 10Aachen 52062Germany Institute for Materials Material TestingRuhr University BochumUniversitatsstr 150Bochum 44801Germany

Sub-surface crack networks in areas of altered microstructure are a common cause for bearing *** to its appearance under light microscopy,the damage pattern is referred to as White Etching Cracks(WEC).The root causes leading to the formation of WEC are still under ***,it has already been shown that atomic hydrogen can have an accelerating effect on the formation and propagation of *** addition to hydrogen pre-charging,hydrogen can be released and absorbed during rolling/sliding due to the decomposing of the lubricant and *** current work focuses on the analysis of the hydrogen content of cylindrical roller thrust bearings after testing in a FE8 type test rig using two different *** the framework of this work,two different hydrogen analysis methods were used and assessed regarding their *** results show that the so-called Hydrogen Collecting Analysis(HCA)is more suitable to investigate the correlation between lubricant chemistry and hydrogen content in the test bearings than the Local Hydrogen Analysis(LHA).The measurements with the HCA show a continuously increasing freely movable and diffusible hydrogen content under tribological conditions,which leads to the formation of *** tests with an oil without hydrogen showed that the tendency of the system to fail as a result of WEC can be reduced by using a lubricant without hydride compounds.

关键词： White Etching Crack(WEC) White Etching Areas(WEA) hydrogen content Hydrogen Collecting Analysis(HCA) freely movable hydrogen diffusible hydrogen cylindrical roller thrust bearing roller bearings roller contact fatigue

Prediction of Crohn's disease aggression through NOD2/CArD15 gene sequencing in an Australian cohort

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World Journal of Gastroenterology 2014年第17期20卷 5008-5016页

作者： Maneesha Bhullar Finlay Macrae gregor Brown Margie Smith Ken Sharpe Department of Colorectal Medicine and Genetics 3 CentreThe Royal Melbourne HospitalParkville 3052Australia Department of Molecular Genetics CMR Room 204PathologyThe Royal Melbourne HospitalParkville 3052Australia Department of Statistics University of MelbourneParkville 3050Australia

AIM: To investigate the association between mutations in oligomerisation domain 2/caspase recruitment domains 15 (NOD2/CArD15) and the natural history of Crohn’s disease (CD) to identify patients who would benefit fr... 详细信息

关键词： Inflammatory bowel disease, Oligomerisation domain 2/caspase recruitment domains 15, Genotyping, Crohn’ s disease, Natural history

Hazard Footprint-Based Normalization of Economic Losses from Tropical Cyclones in China During 1983–2015

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International Journal of Disaster risk Science 2018年第2期9卷 195-206页

作者： Wenfang Chen Yi Lu Shao Sun Yihong Duan gregor C.Leckebusch State Key Laboratory of Severe Weather Chinese Academy of Meteorological Science Shanghai Typhoon Institute of China Meteorological Administration National Climate Center China Meteorological Administration School of Geography Earth and Environmental SciencesUniversity of Birmingham

Loss normalization is the prerequisite for understanding the effects of socioeconomic development,vulnerability, and climate changes on the economic losses from tropical cyclones. In China, limited studies have been done on loss normalization methods of damages caused by tropical cyclones, and most of them have adopted an administrative division-based approach to define the exposure levels. In this study, a hazard footprint-based normalization method was proposed to improve the spatial resolution of affected areas and the associated exposures to influential tropical cyclones in China. The meteorological records of precipitation and near-surface wind speed were used to identify the hazard footprint of each influential tropical cyclone. Provincial-level and national-level(total)economic loss normalization(PLN and TLN) were carried out based on the respective hazard footprints, covering loss records between 1999–2015 and 1983–2015, *** factors—inflation, population, and wealth(GDP per capita)—were used to normalize the losses. A significant increasing trend was found in inflation-adjusted losses during 1983–2015, while no significant trend was found after normalization with the TLN method. The proposed hazard footprint-based method contributes to amore realistic estimation of the population and wealth affected by the influential tropical cyclones for the original year and the present scenario.

关键词： China Direct economic loss Loss normalization Tropical cyclones Typhoon disaster risk

A model for potential non-contact ski injuries of the knee

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Sports Medicine and Health Science 2020年第3期2卷 126-131页

作者： roman Trobec gregor Kosec Matjaz Veselko Institut Jozef Stefan LjubljanaSlovenia Department of Traumatology University Medical Centre LjubljanaLjubljanaSlovenia

Broadly accepted is that most knee injuries result from increased vertical forces,usually induced by an incidental ski fall,collision,or a high *** present a new non-contact knee injury mechanism that can happen during a ski *** an injury is governed by a sudden inward turn of the inner ski and consequent swing of the inner leg followed by a nearly instant stop when locked by hip and knee *** model provides predictive results for a lateral tibial plateau compression fracture because several simplifications have been *** confirmed that the modelled compression stresses at typical skiing conditions and with typical skiing equipment can provoke serious knee *** awareness of skiers and skiing equipment industry of the described knee injury mechanism can act as an important injury-prevention factor.

关键词： Non-contact injury Knee Biomechanical model Compression fracture Lateral tibial plateau