Science – Page 145 – Shamskm: A site to exchange knowledge and solutions

Voyager Map Details Neptune’s Strange Moon Triton

By Guest PostSeptember 12, 2014Sciencecomputer batteries, formen von wasser, icy surface, jupiter, katrin amann winkel, map, moon, moon enceladus, neptune, planet, puzzle about lithium, saturn, shanti deemyad, voyager, wassermolekuele in bewegung

NASA’s Voyager 2 spacecraft gave humanity its first close-up look at Neptune and its moon Triton in the summer of 1989. Like an old film, Voyager’s historic footage of Triton has been “restored” and used to construct the best-ever global color map of that strange moon. The map, produced by Paul Schenk, a scientist at the Lunar and Planetary Institute in Houston, has also been used to make a movie recreating that historic Voyager encounter, which took place 25 years ago, on August 25, 1989. (more…)

Berkeley Lab Researchers Create Nanoparticle Thin Films That Self-Assemble in One Minute

By Guest PostSeptember 10, 2014Scienceberkeley lab, block copolymers, create, fossiles exemplar, gold nanoparticles, joseph kao, kari thorkelsson, knochenfischen, lungenfischen, martin thunemann, microtechnology, mysterioese fossil, nanocomposite, nanometer, palaeospondylus, palaeospondylus gunni, pet cell tracking, peter bai, polymer scientist, researcher, robert feil, self assemble, supramolecule, taskin deniz, ting xu

The days of self-assembling nanoparticles taking hours to form a film over a microscopic-sized wafer are over. Researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) have devised a technique whereby self-assembling nanoparticle arrays can form a highly ordered thin film over macroscopic distances in one minute.

Ting Xu, a polymer scientist with Berkeley Lab’s Materials Sciences Division, led a study in which supramolecules based on block copolymers were combined with gold nanoparticles to create nanocomposites that under solvent annealing quickly self-assembled into hierarchically-structured thin films spanning an area of several square centimeters. The technique is compatible with current nanomanufacturing processes and has the potential to generate new families of optical coatings for applications in a wide number of areas including solar energy, nanoelectronics and computer memory storage. This technique could even open new avenues to the fabrication of metamaterials, artificial nanoconstructs that possess remarkable optical properties. (more…)

Warum Champignons leicht braun werden

By Guest PostSeptember 9, 2014Nature, Scienceafrican rhinos, anna bucharova, armed conflicts, belarus, catastrophic disasters, command levels, coordination, economic damage, forschungen zu krankheiten, hurricane harvey, increasing, inflation adjusted gdp, iot, iot technology, luzhsky training ground, mariana kruger, markierte zellen, mtn, polar code, positronen emissions tomografie, rhino poachers, schwefelwasserstoff, special operation forces, substrate, universitaet wien, uv strahlung, verbot fuer schiffe, welgevonden game reserve, zapad 2017

ChemikerInnen erforschen Verderb von Lebensmitteln

Annette Rompel und ihr Team vom Institut für Biophysikalische Chemie der Universität Wien erforschen die “Bräunungsreaktion” beim Verderb von Champignons. Die ForscherInnen konnten nachweisen, dass das dafür zuständige Enzym bereits gebildet wird, wenn der Pilz noch gar nicht verdorben ist. Die Studie erscheint aktuell online in den renommierten Fachjournalen Phytochemistry und Acta Crystallographica. (more…)

What lit up the universe?

By Guest PostSeptember 9, 2014Sciencedark energy, faint galaxies, intergalactic environment, light from quasars, lyman alpha, lyman alpha light, ultraviolet light, universe

New research from UCL shows we will soon uncover the origin of the ultraviolet light that bathes the cosmos, helping scientists understand how galaxies were built.

The study published in The Astrophysical Journal Letters by UCL cosmologists Dr Andrew Pontzen and Dr Hiranya Peiris (both UCL Physics & Astronomy), together with collaborators at Princeton and Barcelona Universities, shows how forthcoming astronomical surveys will reveal what lit up the cosmos. (more…)

In ancient fish teeth, a tale of ecological resilience

By Guest PostSeptember 7, 2014Scienceamir jina, climate impact lab, cretaceous period, daniel di palma, die off, hertie institut, hidden costs, hurricane irma, james rising, klinische hirnforschung, krankheitsausloeser, online privacy attacks, pacific ocean, prateek mittal, robert kopp, tale, tuebinger neurowissenschaftler, university of california, yale university

Microscopic fish teeth may carry a message of hope from an ecological upheaval in the distant past, scientists at Yale University and the University of California-San Diego (UCSD) have found.

An analysis of tooth fossils and shark scales from the sea floor indicates that a massive die-off of species 66 million years ago did not, in fact, leave uniformly dead oceans around the world. In the Pacific Ocean, at least, some small fish species actually flourished. (more…)

Erstmals Ionenfluss “filmisch” festgehalten

By Guest PostSeptember 6, 2014Scienceaaron olsen, ai algorithms, anton brausemann, duck, enzym phytoen desaturase, goose, holger ehrhardt, joint research, lebensmittelfarbe e160, oliver einsle, peter beyer, physics of ai, reis, sandra gemmecker, suesskartoffel, universitaet wien, watson ai lab

Vienna Scientific Cluster ermöglicht neue High-Tech-Computersimulation

Ionenkanäle sind für eine Vielzahl physiologischer und pathophysiologischer Prozesse im menschlichen Körper lebenswichtig. Ein junges Forschungsteam unter der Leitung von Anna Stary-Weinzinger, Pharmakologin an der Universität Wien, erforschte den Mechanismus des Ionenflusses durch spannungsgesteuerte Natriumionenkanäle. Da dieser Prozess mit einer unglaublichen Geschwindigkeit abläuft – es fließen bis zu 100 Millionen Ionen pro Sekunde –, wurden Computersimulationen durchgeführt, um den Natriumfluss sozusagen in Zeitlupe zu beobachten. Ermöglicht wurde dies durch die Rechenleistung des Vienna Scientific Cluster (VSC), dem schnellsten Computer Österreichs. Die Erkenntnisse sind aktuell in der renommierten Fachzeitschrift PLOS Computational Biology erschienen. (more…)

Short lives, violent deaths: Two CT-scanned Siberian mammoth calves yield trove of insights

By Guest PostSeptember 5, 2014Sciencebrain, ct scans, dopingmittel, dopingstudie, dunkelziffer im spitzensport, france, imran khan, jeffrey lovich, jo dunkley, jorge piedrahita, juergen goller, kopf stehende gesichter, mammoth remains, mickey agha, most intelligent politician, permafrost, russia, schoenheit von gesichtern, sean simpson, skillful sailor, skull, smooth sea, stephanie cone, united states, university of michigan, urintest, wind energy development, wind farm design, wmap project, world leaders

ANN ARBOR — CT scans of two newborn woolly mammoths recovered from the Siberian Arctic are revealing previously inaccessible details about the early development of prehistoric pachyderms. In addition, the X-ray images show that both creatures died from suffocation after inhaling mud.

Lyuba and Khroma, who died at ages 1 and 2 months, respectively, are the most complete and best-preserved baby mammoth specimens ever found. Lyuba’s full-body CT scan, which used an industrial scanner at a Ford testing facility in Michigan, was the first of its kind for any mammoth. (more…)

Physiker weisen erstmals Spin-Symmetrie in Atomen nach

By Guest PostSeptember 5, 2014Scienceatom spin, drehimpuls von atomen, spin symmetrie, spin von atomen

Symmetrie spielt in der Physik eine wichtige Rolle. Auch in der Quantenphysik wurde Symmetrie beim Spin von Atomen erwartet und nun erstmals von US-Forschern gemeinsam mit Quantenphysikern aus Innsbruck nachgewiesen. Die Ergebnisse wurden kürzlich in Science Express publiziert

In mehreren Bereichen spielen Symmetrien in der Physik eine wichtige Rolle – so verhalten sich etwa Antimaterie und Materie trotz ihrer umgekehrten Ladungen von Positronen und Elektronen gleich. In der Quantenphysik wurde beim Spin (Drehimpuls) von Atomen ebenfalls Symmetrie erwartet, konnte bisher aber nicht nachgewiesen werden. (more…)

Category Archives: Science