Under the supervision of Associate Professor Rikard Unelius, Björn Bohman, a chemist, has collaborated with biologists to find the compounds secreted by three different insects.
In South America there are the two blood-sucking triatomines Rhodnius prolixus and Triatoma brasliensis, which carry parasites that spread the deadly Chagas disease that affects millions of people in South America each year. By trying to identify the substances that the insects send out either to attract others of the same species or to alarm others about danger, it will be possible to control these insects.
Biologists have singled out the relevant glands in the insects. In his work Björn Bohman managed to identify several compounds that are found in these glands and then to prepare them synthetically in the laboratory. The objective is to be able to produce an inexpensive monitoring trap (such as a matchbox with a sticky strip and a scent) that people in exposed areas can have in their homes.
For the last five years he has been busy with three projects, one of which involves these triatomines in South America. Moreover he has worked with the lucerne weevil Sitona discoideus, which attacks alfalfa, and developed ways to stop damage from the gnawing of the pine weevil Hylobius abietis, which can be a major problem when clear-cut forests are replanted.
All of the isomers of a potential sex pheromone for the lucerne weevil, 5-hydroxy-4-methyl-3-heptanone, were synthesized using a method developed by Björn Bohman, who used vegetables or mushrooms to produce the desired compounds. This proved to be a both better and considerably simpler method than previously known methods.
Knowledge of insect pheromones and how they can be produced synthetically is important when it comes to finding effective ways to reduce the use of pesticides in agriculture, for example. With this knowledge it is possible, for one thing, to spread tiny amounts of the substance that the insect pests communicate with so that they can't find each other for mating or, the opposite way, to lure them into traps where they can be eliminated.
Transport of molecular motors into cilia
28.03.2017 | Aarhus University
Asian dust providing key nutrients for California's giant sequoias
28.03.2017 | University of California - Riverside
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
14.03.2017 | Event News
07.03.2017 | Event News
28.03.2017 | Life Sciences
28.03.2017 | Information Technology
28.03.2017 | Physics and Astronomy