Scientists have discovered that the heart of a carp keeps beating when it is starved of oxygen for five days. “This is the first time that a vertebrate heart has been shown to survive such prolonged periods without oxygen and actually keep beating at the same rate as when oxygen is available” says Jonathan Stecyk (Simon Fraser University), presenting his latest results at the annual SEB meeting in Edinburgh this week.
“If I were to take oxygen away from your heart it would die in two minutes” says Mr. Stecyk. “But the heart of a carp survives and keeps beating as normal for five days without oxygen.” Crucian carp live in shallow ponds in Scandinavia, which are sealed off by ice in winter. Animals have two problems in such low oxygen environments: they cannot produce enough energy, and have to cope with the build-up of lactic acid that is produced by anaerobic respiration.
“There are two possible coping strategies in low oxygen conditions” says Mr. Stecyk “Either the animal lowers its demand for energy, or it increases the rate of processes that deliver energy.” Carp rely on the second method, which requires a large supply of fuel. Luckily carp have the largest livers among vertebrates, with the largest energy stores relative to body size. By having a heart that goes on, the fish can move this fuel around the body. They can also shuttle lactic acid to the muscles, the only tissue that can convert lactic acid to ethanol, which is then transferred to the gills where it can be excreted. Maintaining circulation allows the fish to avoid the build-up of waste products which could eventually poison the animal. In the face of their hostile environments, carp have developed a complex survival strategy relying on the unique ability of their hearts to survive without oxygen.
Yfke van Bergen | alfa
Don't Give the Slightest Chance to Toxic Elements in Medicinal Products
23.03.2018 | Physikalisch-Technische Bundesanstalt (PTB)
North and South Cooperation to Combat Tuberculosis
22.03.2018 | Universität Zürich
Satellites in near-Earth orbit are at risk due to the steady increase in space debris. But their mission in the areas of telecommunications, navigation or weather forecasts is essential for society. Fraunhofer FHR therefore develops radar-based systems which allow the detection, tracking and cataloging of even the smallest particles of debris. Satellite operators who have access to our data are in a better position to plan evasive maneuvers and prevent destructive collisions. From April, 25-29 2018, Fraunhofer FHR and its partners will exhibit the complementary radar systems TIRA and GESTRA as well as the latest radar techniques for space observation across three stands at the ILA Berlin.
The "traffic situation" in space is very tense: the Earth is currently being orbited not only by countless satellites but also by a large volume of space...
An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.
The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...
In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
23.03.2018 | Event News
19.03.2018 | Event News
16.03.2018 | Event News
23.03.2018 | Materials Sciences
23.03.2018 | Agricultural and Forestry Science
23.03.2018 | Physics and Astronomy