Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Bacteria cause old buildings to feel off color

28.10.2008
Researchers isolate five new Rubrobacter strains that cause biodeterioration

The assumption that time, weather, and pollution are what cause buildings to decline is only partly true.

Bacteria are also responsible for the ageing of buildings and monuments - a process known as biodeterioration, where organisms change the properties of materials through their vital activities. Leonila Laiz from the Institute for Natural Resources and Agrobiology in Seville, Spain, and colleagues have just isolated five new strains of bacteria that degrade old buildings.Their work1 is published online this week in Springer's journal Naturwissenschaften.

Over the last decade, both microbiologists and conservators have been studying the microbial colonization and biodeterioration of both mural paintings in ancient monuments and plaster walls in churches. A specific family of bacteria, Rubrobacter, is commonly found in aged monuments and is thought to be responsible for their rosy discoloration. Until now, only three Rubrobacter species have been identified, and they all thrive in high temperatures of 45 to 80 degrees Celsius (thermophilic bacteria).

Laiz and her team studied three indoor sites showing overt biodeterioration: the Servilia and Postumio tombs in the Roman Necropolis of Carmona in Spain and the Vilar de Frades church in Portugal. Their microbiological and molecular analyses identified five new Rubrobacter strains. The strains are partly involved in the process of efflorescence formation, where salt residues form on buildings, due to the loss of water after exposure to air for a prolonged period of time. Efflorescences lead to damage in the porous structure of the rocks and the gradual deterioration of these buildings.

Two of the newly isolated strains were then grown onto rocks to replicate the biodeterioration process in the laboratory. The Rubrobacter cells penetrated the mineral matrix and crystals formed in contact with the bacterial film. When the film separated from the rock surface after exposure to heat, it removed mineral grains, producing a mechanical deterioration. These three processes are characteristic of biodeterioration and confirm that the isolated bacteria are actively involved in the ageing of the studied buildings.

This study of new Rubrobacter that thrive at lower temperatures (non-thermophilic bacteria) gives another insight into the physiology and activity of these bacteria present in monuments.

Reference
1.Laiz L et al (2008). Isolation of five Rubrobacter strains from biodeteriorated monuments. Naturwissenschaften DOI 10.1007/s00114-008-0452-2

Joan Robinson | alfa
Further information:
http://www.springer.com

More articles from Life Sciences:

nachricht Flow of cerebrospinal fluid regulates neural stem cell division
21.05.2018 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt

nachricht Chemists at FAU successfully demonstrate imine hydrogenation with inexpensive main group metal
21.05.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

Im Focus: Light-induced superconductivity under high pressure

A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.

Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Supersonic waves may help electronics beat the heat

18.05.2018 | Power and Electrical Engineering

Keeping a Close Eye on Ice Loss

18.05.2018 | Information Technology

CrowdWater: An App for Flood Research

18.05.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>