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The best way to get precise information regarding the inner structure of atoms and molecules is to excite them by means of resonant laser light but this laser light can lead to measurable modifications within the atom's electron shell, above a certain intensity. The act of getting the information changes the study.

Scientists of the Physikalisch-Technische Bundesanstalt (PTB) say they have now shown experimentally how to prevent such "light shifts" and that this confirms the advantages of "hyper" Ramsey excitation that had already been predicted theoretically.


A study today highlighted a new therapeutic technique to repair and rebuild muscle for sufferers of degenerative muscle disorders. The therapy brings together two existing techniques for muscle repair, cell transplantation and tissue engineering - mesoangioblast stem cells delivered via a hydrogel cell-carrier matrix.


Some people take risks with investments while others on safety with their money and in other business activities. Researchers have looked at the attitudes towards risk in a group of 56 subjects and found that in people who preferred safety, certain regions of the brain show a higher level of activation when they are confronted with quite unforeseeable situations.  


Marketing people follow predictable patterns; in order to sell something it either needs to scare people or make them feel good.  "This ain't your father's" X is a timeless perceptual classic, meaning it is not old-fashioned and conservative and boring like parents.
Clostridium acetobutylicum became popular when the chemist Chaim Weizmann first used the bacterium to ferment the solvent acetone and the alcohols butanol and ethanol, collectively known as “ABE” products, from starch - he wanted to create synthetic rubber and during World War I the process was used by the British to ferment acetone for the production of cordite, the explosive propellant that replaced gunpowder in bullets and artillery shells.

Mountain glaciers respond to climate change by rapidly advancing or receding as global temperatures have spiked upward and downward numerous times throughout geological history. Those changes in glacier extent control hydrology, sediment transport, and deposition in rivers downstream. 

The sedimentary record in glaciated catchments therefore is an important archive with that can help unravel past climate changes but, unlike rivers, whose flow is controlled entirely by land surface topography, glaciers are able to flow uphill and across ridgelines - a process called "transfluence." Glacier advance and recession can result in drainage capture by transfluent ice flow, and so change catchment drainage areas and hydrological budgets.