Umgang mit Metadaten in Repositorien - Eine österreichweite Umfrage

Dieser Artikel enthält eine Auswertung der Telefonumfrage zum Thema "Metadaten", die im Sommer 2015 unter den am Projekt e-Infrastructures Austria teilnehmenden Institutionen durchgeführt wurde. Ziel der Befragung war eine Bestandsaufnahme der an den einzelnen Universitäten im Einsatz befindlichen Repositorien, um einen Überblick über die wichtigsten Softwaresysteme und deren spezifische Einsatzzwecke, die am häufigsten verwendeten Metadatenstandards und die Gepflogenheiten bzw. Erwartungen der Nutzer und Nutzerinnen zu gewinnen. Zukünftige Planungen und Entwicklungen waren ebenfalls Gegenstand des Fragebogens

Editorial: Schwerpunktthema "Metadata – Metadaten"

Editorial of the special issue on metadata of the Mitteilungen der Österreichischen Bibliothekarinnen und Bibliothekar

Enlarging the tools for efficient enzymatic polycondensation: structural and catalytic features of cutinase 1 from Thermobifida cellulosilytica

9siCutinase 1 from Thermobifida cellulosilytica is reported for the first time as an efficient biocatalyst in polycondensation reactions. Under thin film conditions the covalently immobilized enzyme catalyzes the synthesis of oligoesters of dimetil adipate with different polyols leading to higher Mw (~1900) and Mn (~1000) if compared to lipase B from Candida antarctica or cutinase from Humicola insolens. Computational analysis discloses the structural features that make this enzyme readily accessible to substrates and optimally suited for covalent immobilization. As lipases and other cutinase enzymes, it presents hydrophobic superficial regions around the active site. However, molecular dynamics simulations indicate the absence of interfacial activation, similarly to what already documented for lipase B from Candida antarctica. Notably, cutinase from Humicola insolens displays a “breathing like” conformational movement, which modifies the accessibility of the active site. These observations stimulate wider experimental and bioinformatics studies aiming at a systematic comparison of functional differences between cutinases and lipases.partially_openembargoed_20161210Pellis, Alessandro; Ferrario, Valerio; Zartl, Barbara; Brandauer, Martin; Gamerith, Caroline; Herrero-Acero, Enrique; Ebert, Cynthia; Gardossi, Lucia; Guebitz, GeorgPellis, Alessandro; Ferrario, Valerio; Zartl, Barbara; Brandauer, Martin; Gamerith, Caroline; Herrero Acero, Enrique; Ebert, Cynthia; Gardossi, Lucia; Guebitz, Geor

Handling metadata in repositories - an Austria-wide survey

Dieser Artikel enthält eine Auswertung der Telefonumfrage zum Thema „Metadaten“, die im Sommer 2015 unter den am Projekt e-Infrastructures Austria teilnehmenden Institutionen durchgeführt wurde. Ziel der Befragung war eine Bestandsaufnahme der an den einzelnen Universitäten im Einsatz befindlichen Repositorien, um einen Überblick über die wichtigsten Softwaresysteme und deren spezifische Einsatzzwecke, die am häufigsten verwendeten Metadatenstandards und die Gepflogenheiten bzw. Erwartungen der Nutzer und Nutzerinnen zu gewinnen. Zukünftige Planungen und Entwicklungen waren ebenfalls Gegenstand des Fragebogens.This article discusses the results of a telephone survey on the subject of metadata that was carried out in summer 2015 among the institutions participating in the project e-Infrastructures Austria. The aim of the survey was to provide an overview of the most important software systems and their specific uses, the most commonly used metadata standards and the habits and expectations of the users. Future plannings and developments were also included in the questionnaire

Nachruf auf Wolfgang Kerber (1942-2017)

Obituary to Wolfgang Kerber 1942-2017

Fully renewable polyesters via polycondensation catalyzed by Thermobifida cellulosilytica cutinase 1: an integrated approach

The present study addresses comprehensively the problem of producing polyesters through sustainable processes while using fully renewable raw materials and biocatalysts. Polycondensation of bio-based dimethyl adipate with different diols was catalyzed by cutinase 1 from Thermobifida cellulosilytica (Thc_cut1) under solvent free and thin-film conditions. The biocatalyst was immobilized efficiently on a fully renewable cheap carrier based on milled rice husk. A multivariate factorial design demonstrated that Thc_cut1 is less sensitive to the presence of water in the system and it works efficiently under milder conditions (50 \ub0C; 535 mbar) when compared to lipase B from Candida antarctica (CaLB), thus enabling energy savings. Experimental and computational investigations of cutinase 1 from Thermobifida cellulosilytica (Thc_cut1) disclosed structural and functional features that make this serine-hydrolase efficient in polycondensation reactions. Bioinformatic analysis performed with the BioGPS tool pointed out functional similarities with CaLB and provided guidelines for future engineering studies aiming, for instance, at introducing different promiscuous activities in the Thc_cut1 scaffold. The results set robust premises for a full exploitation of enzymes in environmentally and economically sustainable enzymatic polycondensation reactions

Características hidráulicas da erosão em sulcos em um cambissolo do semiárido do Brasil

A erosão em sulcos é formada a partir da concentração do escoamento superficial nas depressões da superfície do terreno, evoluindo para a formação de canais ou ravinas, o que faz aumentar a degradação dos solos pela erosão hídrica. Os objetivos deste trabalho foram avaliar as condições hidráulicas do escoamento em sulcos pré-formados, caracterizando o regime de escoamento, e avaliar mudanças induzidas na geometria desses sulcos. Para isso, um experimento foi realizado num Cambissolo Háplico do sertão pernambucano, município de Serra Talhada, Brasil. Os tratamentos consistiram na aplicação de vazões de 17,5; 47,0; 60,0; 77,0; e 110,0 L min-1; com duração de 20 min, em sulcos pré-formados em um solo recém-preparado. O aprofundamento dos sulcos foi dominante no início dos testes. A partir do momento em que o sulco atingiu o solo não revolvido, o processo erosivo, ou seja, a ação da tensão cisalhante, caracterizou-se principalmente pelo alargamento do canal, desgastando com maior proporção a base das paredes laterais dos sulcos. A ação da concentração do escoamento superficial nos sulcos experimentais produziu regimes de escoamento na faixa de transição supercrítico, atestando a ocorrência da erosão em sulcos. O cisalhamento na base do sulco, provocado pelo escoamento, facilitou o desmoronamento nas paredes laterais.Rill erosion begins with the concentration of surface runoff on depressions of soil surface, evolving into the formation of channels or ravine, increasing soil degradation by water erosion. The objectives of this study were to evaluate the hydraulic conditions of the water flow in rills and characterize the water flow regime, and to measure the induced changes in the geometry of the preestablished rills. An experiment was conducted in which outflows of 17.5; 47.0; 60.0; 77.0 and 110.0 L min-1 were applied for 20 min to preformed rills in a Cambissolo Háplico, in Serra Talhada, Pernambuco. The deepening of the rills was dominant at the beginning of the tests. From the moment the rill reached the undisturbed soil, the erosive process, i.e., the action of shear stress, was characterized mainly by the widening of the rill, wearing off the bases of the rill sidewalls. The action of the concentrated water flow in the experimental rills produced flow regimes in the range of supercritical transition, confirming the occurrence of rill erosion. The shear stress at the rill base provoked by the flow facilitated the wearing off of the sidewalls

Liberalisation of financial services through international conventions : a European perspective

Award date: 1 October 2000Supervisor: Prof. C. JoergesPDF of thesis uploaded from the Library digitised archive of EUI PhD theses completed between 2013 and 201