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Asterodiscus and Stigmatodiscus,two new apothecial dothideomycete genera and the new order Stigmatodiscales

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Fungal Diversity 2016年第5期80卷 271-284页

作者： hermann voglmayr Alain Gardiennet Walter M.Jaklitsch Division of Systematic and Evolutionary Botany Department of Botany and Biodiversity ResearchUniversity of ViennaRennweg 14A-1030 ViennaAustria 14 rue Roulette F-21260 VéronnesFrance Institute of Forest Entomology Forest Pathology and Forest ProtectionDepartment of Forest and Soil SciencesBOKU-University of Natural Resources and Life SciencesHasenauerstraße 38A-1190 ViennaAustria

During a survey on corticolous Dothideomycetes,several collections with ascospores matching the genera Asteromassaria and Stigmatomassaria(Pleomassariaceae,Pleosporales)were revealed from dead corticated twigs of Acer,Carpinus and *** morphological examination showed that their ascomata were apothecial,with a hamathecium consisting of septate,branched paraphyses,which are apically swollen at *** collections were cultured and sequenced,and a Blast search of their nuc 28S rDNA sequences revealed dothideomycetous affiliation,but without a close match to a specific family or *** analyses of a multigene matrix containing a representative selection of Dothideomycetes from four genes(nuc 18S rDNA,nuc 28S rDNA,rpb2 and tef1)revealed placement within Dothideomycetes but without a supported familial or ordinal *** on the phylogenetic analyses and morphological investigations,the new genera Asterodiscus and Stigmatodiscus,with the two new species *** and ***,are described and illustrated,and placed in the new family Stigmatodiscaceae and new order Stigmatodiscales.

关键词： Ascomycota Dothideomycetes New species Newgenus Newfamily Neworder Phylogenetic analysis Taxonomy

Multigene phylogeny and taxonomy of the genus Melanconiella(Diaporthales)

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Fungal Diversity 2012年第6期57卷 1-44页

作者： hermann voglmayr Amy Y.Rossman Lisa A.Castlebury Walter M.Jaklitsch Department of Systematic and Evolutionary Botany Faculty Centre of BiodiversityUniversity of ViennaRennweg 141030WienAustria Systematic Mycology&Microbiology Laboratory USDAAgricultural Research ServiceB010A10300 Baltimore AveBeltsvilleMD 20705USA

Molecular phylogenetic analyses of LSU rDNA demonstrate monophyly of the genus Melanconiella,and its status as a genus distinct from Melanconis is *** of macro-and microscopic morphology,pure cultures and phylogenetic analyses of partial SSU-ITS-LSU rDNA,tef1 and rpb2 sequences revealed 13 distinct species of Melanconiella,six of which are described as new(***,***,***,***,***,***).Melanconiella hyperopta *** is described as a new *** carpinicola,***,***,*** and *** are formally combined into *** name Melanconiella chrysostroma is excluded from Melanconiella,as it is an obligate synonym of Wuestneia *** type of Melanconiella is confirmed as *** species are lecto-and/or epitypified.A key to all treated species ofMelanconiella is provided,and the circumscriptions of the genera Melanconis and Melanconiella are *** Melanconiella species revealed by molecular phylogenetic analyses can be well characterised by a suite of morphological traits including ascospore shape,length and width,colour,absence/presence and shape of appendages and the ***-teleomorph connections were confirmed by pure culture and DNA data,revealing the presence of a single melanconium-or discosporina-like anamorph for each *** growth was found to be characteristic of the respective *** is shown to be confined to the host family Betulaceae,and all species are found to be highly host-specific,mostly confined to a single host *** biodiversity ofMelanconiella was determined to be centred on the genus Carpinus with nine species,five of which have been confirmed on *** appears to be the geographic centre of Melanconiella biodiversity.

关键词： High diversity Host specificity Melanconidaceae Molecular phylogeny New species Pathogen Systematics

Front line defenders of the ecological niche!Screening the structural diversity of peptaibiotics from saprotrophic and fungicolous Trichoderma/Hypocrea species

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Fungal Diversity 2014年第6期69卷 117-146页

作者： Christian R.Rohrich Walter M.Jaklitsch hermann voglmayr Anita Iversen Andreas Vilcinskas Kristian Fog Nielsen Ulf Thrane Hans von Dohren Hans Bruckner Thomas Degenkolb Bioresources Project Group Fraunhofer Institute for Molecular Biology and Applied Ecology(IME)Winchesterstrasse 235394 GiessenGermany Department of Systematic and Evolutionary Botany Faculty Centre of BiodiversityUniversity of ViennaRennweg 141030 ViennaAustria Department of Systems Biology Technical University of DenmarkSoltofts PladsBuilding 2212800 Kgs.LyngbyDenmark Interdisciplinary Research Centre for BioSystems Land Use and Nutrition(IFZ)Department of Applied EntomologyInstitute of Phytopathology and Applied Zoology(IPAZ)University of GiessenHeinrich-Buff-Ring 26-3235392 GiessenGermany Biochemistry and Molecular Biology OE 2 Institute of ChemistryTechnical University of BerlinFranklinstrasse 2910587 BerlinGermany Interdisciplinary Research Centre for BioSystems Land Use and Nutrition(IFZ)Department of Food SciencesInstitute ofNutritional ScienceUniversity of GiessenHeinrich-Buff-Ring 26-3235392 GiessenGermany AB SCIEXGermany GmbH Landwehrstrasse 5464293 DarmstadtGermany Danish Emergency Management Agency Universitetsparken 22100 CopenhagenDenmark

Approximately 950 individual sequences of nonribosomally biosynthesised peptides are produced by the genus Trichoderma/Hypocreathat belong to a perpetually growing class of mostly linear antibiotic oligopeptides,which are rich in the non-proteinogenic α-aminoisobutyric acid(Aib).Thus,they are comprehensively named ***,peptaibiotics represent ca.80% of the total inventory of secondarymetabolites currently known from Trichoderma/*** unique membrane-modifying bioactivity results from amphipathicity and helicity,thus making them ideal candidates in assisting both colonisation and defence of the natural habitats by their fungal *** this,reports on the in vivo-detection of peptaibiotics have scarcely been published in the *** order to evaluate the significance of peptaibiotic production for a broader range of potential producers,we screened nine specimens belonging to seven hitherto uninvestigated fungicolous or saprotrophic Trichoderma/Hypocrea species by liquid chromatography coupled to electrospray high resolution mass *** of peptaibiotics found were independently confirmed by analysing the peptaibiome of pure agar cultures obtained by single-ascospore isolation from the *** the nine species examined,five were screened positive for peptaibiotics.A total of 78 peptaibiotics were sequenced,56(=72%)of which are ***,dihydroxyphenylalaninol and O-prenylated tyrosinol,two C-terminal residues,which have not been reported for peptaibiotics before,were found as well as new and recurrent sequences carrying the recently described tyrosinol residue at their *** majority of peptaibiotics sequenced are 18-or 19-residue *** homologies with‘classical representatives’of subfamily 1(SF1)-peptaibiotics argue for the formation of transmembrane ion channels,which are prone to facilitate the producer capture and defence of its substratum.

关键词： HPLC/QTOF-ESI-HRMS Metabolite profiling Peptaibiotics Peptaibols Aib peptides Trichoderma Hypocrea

Geoscience material structures prediction via CALYPSO methodology

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Chinese Physics B 2019年第10期28卷 38-49页

作者： Andreas hermann Centre for Science at Extreme Conditions and SUPA School of Physics and Astronomy The University of Edinburgh

Many properties of planets such as their interior structure and thermal evolution depend on the high-pressure properties of their constituent materials. This paper reviews how crystal structure prediction methodology can help shed light on the transformations materials undergo at the extreme conditions inside planets. The discussion focuses on three areas:(i) the propensity of iron to form compounds with volatile elements at planetary core conditions(important to understand the chemical makeup of Earth's inner core),(ii) the chemistry of mixtures of planetary ices(relevant for the mantle regions of giant icy planets), and(iii) examples of mantle minerals. In all cases the abilities and current limitations of crystal structure prediction are discussed across a range of example studies.

关键词： crystal structure prediction core materials planetary ices hydrous minerals

Running‑In Behavior of Wet Multi‑plate Clutches:Introduction of a New Test Method for Investigation and Characterization

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Chinese Journal of Mechanical Engineering 2020年第2期33卷 152-160页

作者： Katharina Voelkel hermann Pflaum Karsten Stahl Gear Research Centre(FZG) Technical University of MunichGarchingGermany

Wet multi-plate clutches are relevant components of modern drivetrain applications,not only in terms of function but also safety and *** at the beginning of their lifetime,distinct changes of the friction behavior may occur and make the actuation of the clutch *** transcript describes the typical running-in behavior of wet multi-plate clutches and gives a general definition for running-in of ***,a new test method to systematically investigate the running-in behavior of clutches is *** test method contains a test procedure to characterize the running-in behavior on different load ***,a multi-stage procedure to evaluate and characterize the running-in behavior of clutches with mathematical approaches and new characteristic values is *** quality of the test method is demonstrated on the example of three different tribological systems from dual clutch transmissions(DCT)and automatic transmissions(AT)application using paper friction linings.

关键词： Clutch Running-in Test method Paper friction lining

Blow-up behavior of Hammerstein-type delay Volterra integral equations

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Frontiers of Mathematics in China 2013年第2期8卷 261-280页

作者： Zhanwen YANG hermann BRUNNER Science Research Center Academy of Fundamental and Interdisciplinary Science Department of Mathematics Harbin Institute of Technology Harbin 150001 China Department of Mathematics Hong Kong Baptist University Hong Kong SAR China Department of Mathematics and Statistics Memorial University of NewfoundlandSt. John's NL AIC 557 Canada

We consider the blow-up behavior of Hammerstein-type delay Volterra integral equations （DVIEs）. Two types of delays, i.e., vanishing delay （pantograph delay） and non-vanishing delay （constant delay）, are considered. With the same assumptions of Volterra integral equations （VIEs）, in a similar technology to VIEs, the blow-up conditions of the two types of DVIEs are given. The blow-up behaviors of DVIEs with non-vanishing delay vary with different initial functions and the length of the lag, while DVIEs with pantograph delay own the same blow-up behavior of VIEs. Some examples and applications to delay differential equations illustrate this influence.

关键词： Delay Volterra integral equation (DVIE) non-vanishing delay vanishing delay blow-up of solution

A SPECTRAL METHOD FOR PANTOGRAPH-TYPE DELAY DIFFERENTIAL EQUATIONS AND ITS CONVERGENCE ANALYSIS

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Journal of Computational Mathematics 2009年第2期27卷 254-265页

作者： Ishtiaq Ali hermann Brunner Institute of Computational Mathematics Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China Department of Mathematics COMSA TS Institute of Information Technology IslamabadPakistan hermann Brunner Department of Mathematics and Statistics Memorial University of NewfoundlandSt.John’sCanada Department of Mathematics Hong Kong Baptist UniversityHong KongChina

We propose a novel numerical approach for delay differential equations with vanishing proportional delays based on spectral methods. A Legendre-collocation method is employed to obtain highly accurate numerical approximations to the exact solution. It is proved theoretically and demonstrated numerically that the proposed method converges exponentially provided that the data in the are smooth. given pantograph delay differential equation

关键词： Spectral methods Legendre quadrature formula Pantograph-type delay differential equations Error analysis Exponential convergence

Overview of Particles and Bubbles in Continuously Cast Steel

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Journal of Iron and Steel Research International 2011年第S2期18卷 211-219页

作者： Karl-hermann TACKE AG der Dillinger Hüttenwerke P.O. Box 1580 D-66748 Dillingen/Saar Germany

This paper gives an overview of phenomena associated with particles and bubbles in continuously cast steel. During steel processing from deoxidation to solidification the inclusion population undergoes changes with opportunities of removal. Flotation is an important separation mechanism. Inclusion particles may accumulate in the solidifying strand, thus forming enriched bands, which depend on the type of casting machine. Bubbles are created during inert gas injection. They also change in size, can float out, but also form accumulation bands. The interaction of bubbles and particles is discussed. Internal structure that recently has been observed on the inner surface of bubbles will be reviewed.

关键词： continuous casting solidification inclusions particles agglomeration accumulation bands gas injection bubbles attachment flotation inner surface wave rings terraces

Simulating orthokinetic heterocoagulation and cluster growth in destabilizing suspensions

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Particuology 2017年第2期15卷 117-128页

作者： Fabian Billow hermann Nirschl Willy Dorfler Institute of Mechanical Process Engineering and Mechanics Karlsruhe Institute of Technology 76131 Karlsruhe Germany Institute for Applied and Numerical Mathematics Karlsruhe Institute of Technology 76131 Karlsruhe Germany

Using direct numerical simulation, we investigate the coagulation behavior of non-Brownian colloidal particles as exemplified by Al2O3 particles. This yields the so-called capture efficiency, for which we give an analytical expression, as well as other time-dependent variables such as the cluster growth rate. Instead of neglecting or strongly approximating the hydrodynamic interactions between particles, we include hydrodynamic and non-hydrodynamic interactions in a Stokesian dynamics approach and a comprehensive modeling of the interparticle forces. The resulting parallelized simulation framework enables us to investigate the dynamics of polydisperse particle systems composed of several hundred particles at the same high level of modeling we used for a close investigation of the coagulation behavior of two unequal particles in shear flow. Appropriate cluster detection yields all the information about large destabilizing systems, which is needed for models used in flow-sheet simulations. After non-dimensionalization, the results can be generalized and applied to other systems tending to secondary coagulation

关键词： Destabilization Coagulation Capture efficiency Al2O3 Cluster detection Stokesian dynamics