Such cheeses are representative of a traditional production process using raw milk and rennet. Its microbiological richness is higher than that of industrially-produced ones which, although they are completely fit for human consumption, lose part of their distinctive properties.
To characterize the bacterial strains, the research team has used two basic techniques: the traditional methods depending on microbial cultures and the innovative molecular methods of DNA extraction and characterization. Whereas in the first ones you have to wait for bacteria to grow, with the DNA it is possible to do a much faster and exhaustive analysis of all the micro-organisms of the product. These two techniques are complementary.
Through this joint process, the research team obtains the genetic fingertip of the cheeses, an identification of the organisms they are made of and their relation with the organoleptic features (which can be perceived by the senses) of the cheese. The process is done again in the different ripening phases to see how micro-organism populations vary according to time and scientifically establish the development process of the product. Finally, the research work has tried to determine the safety of this kind of cheeses, which is essential to commercialize them.
To this extent, the presence of enterococci, a type of bacterium usually associated to the faecal contamination of food. This kind of bacteria can be naturally found both in human and animal intestine, but they can be beneficial, as they avoid the implementation of pathogen agents. According to the analysis carried out, although these micro-organisms often isolate themselves from traditionally-produced cheeses, their presence is not harmful to health. Furthermore, enterococci also influence positively cheese properties.
“Even in industrially-produced products we have found enterococci, and it does not mean that they are unfit. The analysed goat’s cheeses are completely safe”, specifies Manuel Martínez Bueno, a microbiologist of the University of Granada [http://www.ugr.es]. These results, together to those recently published by another research group of the UGR emphasizing the excellent nutritive properties of goat’s milk, can be a recognition for a cattle sector that, in the last thirty years, have found their livestock reduced to the half.
Energy crop production on conservation lands may not boost greenhouse gases
13.03.2017 | Penn State
How nature creates forest diversity
07.03.2017 | International Institute for Applied Systems Analysis (IIASA)
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
20.03.2017 | Event News
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29.03.2017 | Materials Sciences
29.03.2017 | Physics and Astronomy
29.03.2017 | Earth Sciences