Bioeconomy

Article - 13/02/2018

Pleasant aromas from biogas

Butyric acid is an important source of fruity aromas. It accumulates as an intermediary product during biogas production, from where it can be siphoned off and used for producing flavours. A new collaborative project aims to explore the technological and bioeconomic potential of extracting butyric acid from biogas plants.

Article - 04/12/2017

Textiles: water-repellent thanks to fungal proteins

Outdoor lovers and athletes love them: water-repellent jackets and trousers. However, many consumers are unaware that the chemicals used to functionalise the textile surface often pollute the environment. Organic fluorine compounds (perfluorocarbons = PFC) are usually added to textiles to make them water-repellent. Scientists at the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB and the Hohenstein Group are researching an…

Article - 01/09/2016

Tailor-made biotech fibres for improved wound dressings

Scientists have developed a biotechnological process to produce bacterial alginate. The alginate quality is highly reproducible, making it suitable for the production of fibre-based medicinal products such as wound dressings.

Article - 19/04/2016

Follow-up: Interview with Thomas Helle on new developments in bioleaching

Some time ago, thanks to BIOPRO Baden-Württemberg, the biotechnology company Novis GmbH met Prof. Dr. Andreas Kappler, a renowned geomicrobiologist at the University of Tübingen.The two partners went on to test bioleaching methods for their ability to recover metals from slag using bacteria. In an interview with Dr. Thomas Helle, CEO of Novis GmbH, Dr. Ursula Göttert, on behalf of BIOPRO, asked what has become of the project.

Article - 29/02/2016

Biopower made from wastewater

Researchers worldwide are working to develop new technologies for producing clean energy. A team of researchers led by Sven Kerzenmacher at the University of Freiburg's Department of Microsystems Engineering (IMTEK) is interested in combining wastewater and bacteria, an approach that is both unusual and promising.

Article - 25/01/2016

How the application of chemicals in response to oil spills can be improved

When an oil spill occurs, chemical dispersants are routinely applied to the surface of the oil-contaminated seawater or into deeper water regions. Dr. Sara Kleindienst, a molecular ecologist from the Centre for Applied Geoscience at the University of Tübingen, has now shown that chemical dispersants do not stimulate oil biodegradation. In cooperation with an international team of researchers, Kleindienst simulated the Deepwater Horizon oil well…

Article - 30/11/2015

Bacterial MccA is better than other enzymes when it comes to reducing sulphites

Dr. Bianca Hermann from the University of Freiburg specialises in multi-haem enzymes, and investigates the enzymes’ structure and reaction mechanisms. She has clarified the enzymes’ crystal structure and reaction mechanisms and found out why the bacterial MccA enzyme complex can reduce sulphur-containing substances such as sulphites up to a hundred times faster than other enzymes.

Article - 11/11/2015

A metal enzyme that can cleave benzene rings

Aromatic rings are extremely stable and very difficult to break apart. Prof. Dr. Matthias Boll from the University of Freiburg’s Faculty of Biology and his team work with Geobacter metallireducens, a bacterium that can completely degrade aromatic compounds under strictly anaerobic conditions. While the biological degradation of aromatic hydrocarbons is of global relevance, the chemical resulting from the reduction of benzene rings could also be…

Article - 08/06/2015

Biosurfactants - effective fat solvents made by bacteria

In early 2015, a company called Biotensidon GmbH from Karlsruhe established a white biotechnology subsidiary to develop a fermenter prototype for producing rhamnolipids, which are excellent bacterial surfactants. The project, which was carried out in cooperation with scientists from the Science & Technology Center in Ukraine, means that traditional petroleum-based surfactants can now be replaced by biosurfactants. The latter are extremely…

Article - 09/12/2013

Biological soil remediation: phytoremediation with plants and their associated microbes

Prof. Dr. Andreas Kappler and his team of researchers from the University of Tübingen are exploring how cadmium and other harmful metal compounds can be removed from soil. The principle is based on the ability of bacteria to break up cadmium-containing soil particles the released cadmium is then taken up by the plants and removed as the plants are pruned and disposed of.

Article - 10/06/2013

An ingenious trick of nature: bacterial toxin-antitoxin systems

Cyanobacteria, also known as blue-green algae, are the oldest known form of life and have been around for 3 billion years. It stands to reason therefore that they should be relatively simple and primitive organisms. But this is not quite the case: two scientists from the Institute of Biology III at Freiburg University, Stefan Kopfmann and Prof. Dr. Wolfgang Hess, have discovered that cyanobacteria have developed a clever natural selection…

Article - 31/05/2013

Research in Biberach – does the bioeconomy have a purple future?

Rhodospirillum rubrum bacteria have long attracted the interest of biotechnologists due to their ability to produce large quantities of pigments. Microbiologist Hartmut Grammel from Biberach University of Applied Sciences and scientists from the Magdeburg-based Max Planck Institute for Dynamics of Complex Technical Systems are studying the bacterias suitability for the fixation of CO2 with the distant objective of producing organic materials with…

Article - 03/09/2012

The Matryoshka principle of green symbiosis

Unicellular, aquatic dinoflagellates are masters of what is known as nested symbiosis. They engulf chloroplast-carrying organisms which enable them to photosynthesize sunlight. While this type of symbiotic relationship enables dinoflagellates to survive, the toxins produced by algal blooms, which typically involve dinoflagellates, can have a deadly effect on marine life. This in turn can also affect organisms that consume marine life – including…

Article - 23/07/2012

Extremophilic bacteria: our distant ancestors

Thermophilic and hyperthermophilic archaea and bacteria give us an idea of the conditions under which organisms evolved as long as 3.5 billion years ago. It is still unclear whether the first cells originated on the surface of hot volcanic springs or on hydrothermal vents in oceans.

Article - 23/07/2012

Inhospitable niches are a rich source of extremozymes

At first sight nothing much seems to grow in either the Namib desert or the Antarctic. However a closer inspection of the ground a few centimetres below the surface reveals an enormous diversity of organisms. Industry is well aware of this rich source of microorganisms that have something to offer on the molecular level as well as for use in technical applications. So-called extremozymes have long been popular ingredients in cosmetics detergents…

Article - 23/07/2012

The heat is on – unknown biochemistry in extreme situations

Most of what is easily accessible has in principle already been discovered said Dr. Ivan Berg from the University of Freiburg explaining why he is investigating the metabolic pathways in extremophilic microorganisms. The researcher and his team are interested in the biochemistry of organisms living in hot volcanic springs and the Dead Sea. Examples of this are two metabolic pathways which the researchers from Freiburg discovered in organisms…

Dossier - 23/07/2012

Extremophilic bacteria

What causes stress for some, actually speeds others like extremophilic bacteria up. They love it hot, sour or salty, toxic substances like heavy metals also do them good and even give them energy. As molecular and systems biology techniques get better and better, industry is also becoming increasingly interested in these exotic organisms. What potential does knowing the biochemistry of extremophilic bacteria have for the pharmaceutical, cosmetics…

Article - 29/05/2012

David Schleheck: exploring the effective degradation of surfactants

David Schleheck biologist at the University of Konstanz focuses on the bacterial degradation of surfactants and LAS in particular. The results of his research are of huge importance for the recycling of grey water in areas including home sewage treatment systems for example.

Article - 16/04/2012

Symbiogenesis of mitochondria and plastids

The endosymbiotic theory, which holds that eukaryotic mitochondria and plastids arose from the engulfment and integration of a bacterium by another cell, has long been a matter of controversial debate, but growing evidence over time has led to the substantiation and universal acceptance of the theory. Recent genetic and biochemical analyses have provided detailed insights into the fundamental events that happened more than a billion years ago.

Article - 14/11/2011

DFG research group to unravel prokaryotic immune system

It is difficult to believe that unicellular organisms such as archaea and bacteria can have developed sophisticated strategies to fight off foreign nucleic acids. However, many of these tiny organisms actually possess a virus defence mechanism known as CRISPR/Cas. Compared to this defence mechanism, protective mechanisms such as restriction and modification appear extremely clumsy indeed.

Press release - 04/08/2011

Testing water quality - Test kit makes in situ testing easy

Moisture and warmth create the ideal living conditions for a wide range of micro-organisms which can pose a risk to human health. Now, a new quick testing kit for bacteria means that the microbiological contamination of water or other surfaces can be measured directly in situ, with no need for expensive and time-consuming laboratory tests.

Article - 29/06/2011

Bernhard Eikmanns makes a soil bacterium fit for industrial application

Bernhard Eikmanns prefers not to get involved in research that will end up on bookshelves. So it was an easy decision for the biologist to drop the research he was doing into bacteria that are difficult to cultivate during his doctoral studies and concentrate instead on Corynebacterium glutamicum, a bacterial species that is much easier to cultivate. Corynebacterium glutamicum is an excellent object for scientific research and industrial…

Article - 10/01/2011

Batteries powered by waste

What can we do with all the waste produced by private households? One possible solution is to feed it into a fridge-sized tank in the cellar or garage that can convert waste into electricity. Dr. Sven Kerzenmacher and Dr. Johannes Gescher from the University of Freiburg are hoping that one day such a vision will be made possible through the use of bacteria. The two researchers work with so-called exoelectrogenic microorganisms which they put into…

Article - 20/12/2010

Determination of the risk potential of particulate matter from wood combustion

Polycyclic aromatic hydrocarbons found in particulate matter in our environment are currently being studied by a network of institutes and research institutions, both in Germany and around the world. The impact of polycyclic aromatic hydrocarbons and other toxic components of particulate matter on human and animal health is not yet known in detail. However, their impact on the development of lung diseases such as asthma and other chronic…

Article - 06/12/2010

Foam from bacteria

All washing agents and household detergents contain surface-active agents that bind and dissolve dirt. Up until now these agents have been produced from organic compounds extracted from mineral oil. Due to the ongoing debate on sustainability more and more manufacturers are focusing on biological alternatives. The research group led by Dr. Rudolf Hausmann at the Karlsruhe Institute of Technology KIT is investigating the conditions under which…