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Anyone entering the world of quantum physics must prepare themself for quite a few things unknown in the everyday world: Noble gases form compounds, atoms behave like particles and waves at the same time and events that in the macroscopic world exclude each other occur simultaneously.
In the world of quantum physics, Reinhard Dörner and his team are working with molecules which - in the sense of most textbooks - ought not to exist: Helium compounds with two atoms, known as helium dimers. Helium is called a noble gase precisely because it does not form any compounds. However, if the gas is cooled down to just 10 degrees above absolute zero (minus 273 °C) and then pumped through a small nozzle into a vacuum chamber, which makes it even colder, then - very rarely - such helium dimers form. These are unrivaledly the weakest bound stable molecules in the Universe, and the two atoms in the molecule are correspondingly extremely far apart from each other. While a chemical compo
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Quantum wave in helium dimer filmed for first time
Anyone entering the world of quantum physics must prepare themself for quite a few things unknown in the everyday world: Noble gases form compounds, atoms behave like particles and waves at the same time and events that in the macroscopic world exclude each other occur simultaneously.
In the world of quantum physics, Reinhard Dörner and his team are working with molecules which – in the sense of most textbooks – ought not to exist: Helium compounds with two atoms, known as helium dimers. Helium is called a noble gase precisely because it does not form any compounds. However, if the gas is cooled down to just 10 degrees above absolute zero (minus 273 °C) and then pumped through a small nozzle into a vacuum chamber, which makes it even colder, then – very rarely – such helium dimers form. These are unrivaledly the weakest bound stable molecules in the Universe, and the two atoms in the molecule are correspondingl
Cultural Marxism s Origins: How the Disciples of an Obscure Italian Linguist Subverted America – Ricochet ricochet.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ricochet.com Daily Mail and Mail on Sunday newspapers.
Messelopython freyi. Image credit: Senckenberg Research Institute.
The newly-identified python species lived in what is now Germany, approximately 47.6 million years ago (Eocene period).
Named
Messelopython freyi, the ancient snake is the earliest-known member of the superfamily Pythonoidea.
“The geographic origin of pythons is still not clear,” said co-author Dr. Krister Smith, a paleontologist in the Department of Messel Research and Mammalogy at the Senckenberg Research Institute and the Institute for Ecology, Diversity and Evolution at the Goethe University Frankfurt.
“According to our findings, these snakes already occurred in Europe at the time of the Eocene, over 47 million years ago,” said lead author Dr. Hussam Zaher, a paleontologist in the Museu de Zoologia at the Universidade de São Paulo.
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Sebastian Lobentanzer of Goethe University, Frankfurt, has been studying small RNA dynamics in various contexts using bioinformatic methods. Recently, small RNAs have become more and more interesting for researchers, primarily because of their extensive regulatory functions. To examine these functions in stroke, Lobentanzer joined Katarzyna Winek of Hebrew University, Jerusalem, to study microRNAs and tRNA fragments in blood samples from ischemic stroke patients collected at Charité, Berlin. tRNA fragments, which until now were only thought to be debris of the amino acid-transporting tRNAs, have recently been shown to possess biological functions; naturally, we were very interested in that, explains the pharmacologist.