Johanna Leissner

Johanna Leissner
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Fraunhofer · Fraunhofer Brussels

Doctor of Natural Sciences

About

37
Publications
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290
Citations

Publications

Publications (37)
Chapter
There is growing concern about the threat posed by climate change to cultural heritage, notably to World Heritage properties. Climate change is triggering changes in rainfall patterns, humidity and temperature, as well as increasing exposure to severe weather events that can negatively impact on cultural heritage materials and structures by enhanci...
Chapter
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Continued preservation of cultural heritage requires reliable climate information as input for an accurate projection of possible impacts of climate change. Future climate-induced outdoor risks for cultural heritage can in general be estimated from the information provided by Earth System Models (ESMs). In this paper we present the results of the p...
Preprint
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The article was published in the book Cartadaitalia Vol I, numero speciale as a contribution to the European Yaer of Cultural Heritage 2018
Presentation
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Highly sensitive glasses have been developed by the Fraunhofer Institute for Silicate Research ISC within the EU project ”Assessment and Monitoring of the Environment of Cultural Property (AMECP)” in the mid 1990s to monitor the synergistic effects of environmental parameters such as humidity, temperature and air pollutants like sulfur dioxide, nit...
Presentation
Full-text available
In order to assess the most substantial risks of changing climate conditions on historic artifacts in specific regions, the large-scale integrated EU-Project CLIMATE FOR CULTURE has taken the approach of correlating high resolution regional climate modeling with building simulation tools to produce scenarios of future indoor climates in historic bu...
Article
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Background The present study reports results from the large-scale integrated EU project “Climate for Culture”. The full name, or title, of the project is Climate for Culture: damage risk assessment, economic impact and mitigation strategies for sustainable preservation of cultural heritage in times of climate change. This paper focusses on implemen...
Article
Full-text available
Due to climate change a slowly increasing annual temperature may be experienced by structures. Relative humidity (RH) fluctuations affect the equiibrium moisture content of materials. Repeated RH cycling leads to mechanical failure and may endanger an object's structural integrity. Preventive conservation is based on adopting measures that will pre...
Conference Paper
Environmental impact on artworks has always been a big issues for preservation of Cultural Heritage. Nowadays with the climate change it is experienced a slow but steady process of temperature increase affecting relative humidity which fluctuates while materials attempt to keep moisture balance. During repetitive equilibrium courses fatigue accumul...
Conference Paper
Full-text available
In order to assess the most substantial risks of changing climate conditions on historic artifacts, the large-scale integrated EU-Project CLIMATE FOR CULTURE has taken the approach of correlating high resolution regional climate modeling with building simulation tools to produce scenarios of indoor climates in historic buildings from the recent pas...
Article
Full-text available
Climate Change is one of the most critical global challenges of our time and the burdened cultural heritage of Europe is particularly vulnerable to be left unprotected. Climate for Culture2 project exploits the damage impact of climate change on cultural heritage at regional scale. In this paper the progress of the study with in situ measurements a...
Chapter
Full-text available
Climate Change is one of the most critical global challenges of our time and the burdened cultural heritage of Europe is particularly vulnerable to be left unprotected. Climate for Culture 2 project exploits the damage impact of climate change on cultural heritage at regional scale. In this paper the progress of the study with in situ measurements...
Chapter
Einleitung Monitoring von denkmalgeschützten Objekten Wiederkehrende zerstörungsfreie Prüfung von denkmalgeschützten Objekten Kontinuierliche Dauerüberwachung mit instrumentierter Messtechnik Dauerüberwachung in Innenräumen und außenliegenden Bereichen mit kumulativen Messmethoden Naturstein-Monitoring – Methoden zur Bewertung von Konservierungsmaß...
Article
At 15 prominent churches and cathedrals in 7 European countries the environmental corrosive stresses at the stained glass windows were assessed by glass sensors. Special emphasis was given to the protective properties of different types of protective glazings. The obtained total stress level data, based on MI-glass sensor measurements, help to conc...
Chapter
The results of a pilot study show that KrF Excimer laser treatment seems to be a promising soft cleaning method for removing organic materials such as protective coatings, adhesives and biofilms from the surface of mediaeval stained glass window.
Article
Stained glass windows belong to the most important cultural heritage of Europe. Within the last decades a disastrous deterioration took place. The wonderful stained glass windows and their glass paintings as pieces of art are acutely menaced by environmental corrosive influences. This corrosion process is a very complex reaction which is not only i...
Article
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Fluorophosphate glasses can combine low melting temperatures with a good chemical durability. In order to vary optical properties while retaining other features some new compositions were synthesized and some of their properties were investigated. The glasses were melted at 450°C by using SnO, PbF2, SnF2, NH4H2PO4 and NH4PF6 as raw materials. Metal...
Article
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Square planar iridium(I) complexes of sulfur monoxide and sulfur dioxide undergo oxidative addition with dihydrogen and hydrogen chloride. The resulting hydrido-iridium(III) complexes have been characterized by
Article
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The complexes [M(P/Pr 3) 2 (SO)Cl] (M = Rh, Ir) react with CO under mild conditions to give free SO which is trapped by cycloaddition to an ortho-quinone.
Article
The sulfur dioxide complexes Ir(PR3)2Cl(SO2) (R  i-Pr, cyclohexyl) react with CO to give the corresponding carbonyls Ir(PR3)2Cl(CO) via the unstable intermediates Ir(PR3)2Cl(CO)(SO2). With H2 and HCl they form the oxidative-addition products IrH2(PR3)2Cl(SO2) and IrH(PR3)2Cl2(SO2), respectively.

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