However, pig semen must be diluted and stored liquid, and the storage capacity is only a few days. The window of opportunity for insemination is also limited. Striking the period when the sow is receptive is difficult and farmers need to inspect the animals regularly.
“The timeframe from when a sperm dose for pigs is extracted until it must be utilised is five days,” says reproduction research scientist Ann Helen Gaustad at Norsvin. “Extending this by one to two days would be extremely significant.”
The two organisations contacted SINTEF in 2003 and with the assistance of funding from the Research Council of Norway a research project was commenced. Research scientists wanted to influence sperm cells to become capable of fertilising over a longer period. In 2008, the status is that the research scientists have developed a technique that moulds the sperm cells into an alginate gel. The cells can then be stored until the gel is inseminated into the animal.
“We have been trying to confirm a hypothesis that restricted tail movements of sperm cells, as is the case when they are in the animal’s testicles, provides longer lasting qualities,” says Geir Klinkenberg at SINTEF. “We achieve the restrictions by using the gel and the results to date are good. By achieving longer storage ability, it prolongs the lifespan of the sperm population in the uterus.”High values
“This is production on an industrial scale where the sperm can be utilised on a large number of animals, and where each sperm and each piglet represents high values,” says Klinkenberg.
The next step will take place in the spring with insemination trials on larger animals. Around 1000 animals will be inseminated using the new method to see if better results are achieved than with today’s conventional methods.
“This is a completely new and revolutionary approach where the focus has been on controlling the processes that occur both before and after the insemination,” says Geno Research & Development Manager Elisabeth Kommisrud.
Aase Dragland | alfa
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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...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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24.03.2017 | Physics and Astronomy