Results 121 - 140 of 556.
Physics - Environment - 01.12.2022
A sustainable path for energy-demanding photochemistry
Researchers in Mainz and Kyushu established a novel strategy for the generation of highly energetic UV light Many photochemical processes rely on UV light from inefficient or toxic light sources that the LED technology cannot replace for technical reasons. An international team of scientists led by Professor Christoph Kerzig of Johannes Gutenberg University Mainz (JGU) in Germany and Professor Nobuhiro Yanai of Kyushu University in Japan has now developed the first molecular system for the conversion of blue light into high-energy UV photons with wavelengths below 315 nanometers.
Life Sciences - Physics - 30.11.2022
The junction is the key
Researchers decrypt transport dynamics of porous media What laws govern how chemicals pass through filters? How do droplets of oil move through layers of stone? How do blood cells travel through a living organism? A team of researchers led by the Technical University of Munich (TUM) and the Max Planck Institute for Dynamics and Self-Organization (MPI-DS) has discovered how pore space geometry impacts transport of substances through fluids.
Astronomy / Space Science - Physics - 28.11.2022
Deepest look yet into the heart of a quasar
International team observes innermost structure of quasar 3C 273 At the core of almost every galaxy is a supermassive black hole. But there are many different types. Quasars, for example, are one of the brightest and most active types of galaxy centres. An international group, including researchers from the Max Planck Institute for Radio Astronomy in Bonn, presents new observations of the first quasar ever identified.
Astronomy / Space Science - Physics - 24.11.2022
Catching the dynamic Coronal Web
Researchers discover an important clue as to what mechanism drives the solar wind Using observational data from the U.S. weather satellites GOES, a team of researchers led by the Max Planck Institute for Solar System Research (MPS) in Germany has taken an important step toward unlocking one of the Sun-s most persevering secrets: How does our star launch the particles constituting the solar wind into space? The data provide a unique view of a key region in the solar corona to which researchers have had little access so far.
Astronomy / Space Science - Physics - 23.11.2022
A sharp look into the nucleus of a quasar
International team observes the innermost structure of the jet of 3C 273 At the core of almost every galaxy is a supermassive black hole. But there are many different types. Quasars, for example, are one of the brightest and most active varieties of galactic centers. An international group, including researchers from the Max Planck Institute for Radio Astronomy in Bonn, Germany, presents new observations of the first quasar ever identified.
Physics - Materials Science - 23.11.2022
Watching light beams go out
A team from the Friedrich Schiller University Jena has set up a new streak camera on ID16B, which can measure very fast kinetic phenomena present in light emission after receiving an X-ray pulse. The camera is now available to the user community to study complex carrier dynamics with spatio-temporal resolutions.
Physics - Chemistry - 22.11.2022
Elusive carbonic acid: it really exists!
Neutrons from FRM II expose crystal structure of carbonic acid The existence of carbonic acid has long been the subject of debate: theoretically real, but practically impossible to detect. That is because the compound decomposes at the Earth's surface. A German-Chinese team of researchers working at the FRM II Research Neutron Source at the Technical University of Munich (TUM) has now made the crystalline structure of carbonic acid molecules visible for the first time.
Physics - Electroengineering - 21.11.2022
Long-range information transport in antiferromagnets
Physicists at JGU discovered: Antiferromagnets are suitable for transporting spin waves over long distances Smaller, faster, more powerful: The demands on microelectronic devices are high and continue to rise. However, if chips, processors and the like are based on electric current, there are limits to miniaturization.
Physics - Innovation - 21.11.2022
Researchers control individual light quanta at very high speed
A team of German and Spanish researchers from Valencia, Münster, Augsburg, Berlin and Munich have succeeded in controlling individual light quanta to an extremely high degree of precision. In the "Nature Communications" journal, the researchers report how, by means of a soundwave, they switch individual photons on a chip back and forth between two outputs at gigahertz frequencies.
Chemistry - Physics - 17.11.2022
Problem solved in organic chemistry
In chemicals used in agriculture, as well as in pharmaceuticals and a variety of materials, pyridines are often found as so-called functional units which decisively determine the chemical properties of substances. Pyridines belong to the group of ring-shaped carbon-hydrogen (C'H) compounds ("heterocycles"), and they contain a nitrogen atom (N).
Physics - Health - 10.11.2022
Quantum technology for cancer imaging
Applied quantum mechanics in medicine Tracing the metabolism of tumor cells using magnetic resonance imaging (MRI) has not been feasible in routine clinical settings hitherto. Now, an interdisciplinary research team including the Technical University of Munich (TUM) is working to advance the development of a quantum-based hyperpolarizer so that it can be deployed in clinical applications.
Physics - 08.11.2022
Magnetic Quantum Fluid: Extremely Fluid in Two Ways
Heidelberg physicists demonstrate the coexistence of superfluids in ultracold atomic clouds Two superfluids can exist at the same time in ultracold atomic clouds. Until now, their coexistence could not be observed experimentally. Now, however, physicists from Heidelberg University have demonstrated such a magnetic quantum fluid - it is fluid in two ways - in an atomic gas.
Physics - 07.11.2022
Clever method for separating nano-components
Physicists from Friedrich Schiller University Jena, together with colleagues from Düsseldorf, Gothenburg, Lyngby and Trieste have developed an ingenious solution for separating bonded nano-components. Their idea is to immerse the nano-components in a solvent near its critical point. In the experimental setup, they succeeded in separating the components in a controllable fashion by only changing the temperature of the solvent.
Astronomy / Space Science - Physics - 04.11.2022
IceCube neutrinos give us first glimpse into the inner depths of an active galaxy
Mainz-based scientists have been members of the IceCube consortium since 1999 For the first time, an international team of scientists found evidence of high-energy neutrino emission from NGC 1068, also known as Messier 77, an active galaxy in the constellation of Cetus and one of the most familiar and well-studied galaxies to date.
Astronomy / Space Science - Physics - 03.11.2022
Wobbling like a spinning-top - surprising observations of X-ray pulsar
An X-ray pulsar is a rotating magnetized neutron star. The very first direct measurement of the polarization of an X-ray pulsar by the Imaging X-ray Polarimetry Explorer (IXPE) space telescope has challenged previous models of such systems. The degree of polarization of the X-ray pulsar Hercules X-1 was much lower than theoretically predicted, so astrophysicists are now having to reconsider their basic ideas about the geometry and structure of matter flows.
Astronomy / Space Science - Physics - 26.10.2022
Lightest-ever neutron star or strange quark matter?
The lightest neutron star so far found is located at the center of the supernova remnant HESS J1731'347 . Dr. Victor Doroshenko, Dr. Valery Suleimanov, Dr. Gerd Pühlhofer and Professor Andrea Santangelo from the High Energy Astrophysics section of the University of Tübingen's Institute of Astronomy and Astrophysics discovered the unusual object with the help of X-ray telescopes in space.
Physics - Chemistry - 26.10.2022
Using chirality for faster, smaller, and more efficient data storage devices
Mainz University succeeds in the first round of the new Carl Zeiss Foundation Wildcard program / Researchers present an innovative approach for enhancing electronic devices 26 October 2022 Researcher
Astronomy / Space Science - Physics - 26.10.2022
Astronomy: Observation puzzles researchers
Finding cannot be explained by classical assumptions. Study under the leadership of the University of Bonn An international team of astrophysicists has made a puzzling discovery while analyzing certain star clusters. The University of Bonn played a major role in the study. The finding challenges Newton's laws of gravity, the researchers write in their publication.
Physics - Research Management - 25.10.2022
Experimental Physicist Robert Bittl Receives ERC Synergy Grant Together with an International Team of Researchers
European Research Council grants international research team almost nine million euros / Experimental physicist at Freie Universität Berlin receives a share of over two million euros Professor Robert Bittl, an experimental physicist at Freie Universität Berlin, is to receive over two million euros through an ERC Synergy Grant from the European Research Council (ERC) as part of a joint international research project.
Physics - 24.10.2022
The conundrum of the anomalous magnetic moment of the muon
New calculations based on fundamental theories deviate from the currently accepted theoretical value The anomalous magnetic moment of the muon is a crucial parameter in particle physics as it allows for precision tests of the established Standard Model. A new measurement of this quantity in 2021 caused a furore as it reaffirmed a significant deviation from the theoretical prediction - in other words, the anomalous magnetic moment is greater than anticipated.