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2-proton Bit Controlled By Single Copper Atom
2014-01-17 12:27:57

Institute of Physical Chemistry of the Polish Academy of Sciences Just a single foreign atom located in the vicinity of a molecule can change spatial arrangement of its atoms. In a spectacular experiment, an international team of researchers was able to change persistently positions of the nuclei of hydrogen atoms in a porphycene molecule by approaching a single copper atom to the molecule. A subatomic bit formed by two protons tunneling inside a simple organic molecule can be switched...

2013-07-23 15:36:21

New model sheds further light on the Grotthuss mechanism Protons, as positively charged hydrogen ions, move very rapidly in water from one water molecule to the next, which is why the conductivity of water is relatively high. The principle of proton conduction in water has been known for 200 years and is named the Grotthuss mechanism after its discoverer, Theodor Grotthuss. It is based on the assumption that it is not that a single specific proton moving from one molecule to another;...

Molecular Matter Is The Same As 7 Billion Years Ago
2012-12-13 14:29:50

Lee Rannals for redOrbit.com - Your Universe Online Researchers reported today in the journal Science Express that the ratio of the proton's mass to that of the electron has hardly changed over the past seven billion years. This fundamental constant of nature has changed by a maximum of one hundred thousandth of a percent over cosmic history. Scientists from VU University Amsterdam and the Max-Planck-Institut für Radioastronomie (MPIfR) used the Effelsberg 100-m radio...

Study Finds Way To Observe Ion Responsible For Early Star Formation
2012-04-14 06:02:08

Researchers from the University of Arizona (UA) claim that they have found a way to observe the triatomic hydrogen ion believed to be the key element responsible for the formation of the first stars following the Big Bang. According to an article published to the UA News website on Wednesday, the molecule, which is known as H3+, is an ion that consists of three hydrogen atoms with just a pair of electrons to share between them, giving it a positive charge. It is believed to be the catalyst...

2011-08-08 12:31:52

Los Alamos team sees unprecedented proof of ion's role in enzymatic process A Los Alamos National Laboratory research team has harnessed neutrons to view for the first time the critical role that an elusive molecule plays in certain biological reactions. The effort could aid in treatment of peptic ulcers or acid reflux disease, or allow for more efficient conversion of woody waste into transportation fuels. In a paper appearing this week in Angewandte Chemie International Edition, Los Alamos...

2010-08-24 17:15:16

Mapping the structure of protonated water clusters Water molecules are continuously forming short-lived networks called clusters. These can in turn bind positively charged protons, and such clusters can provide active functional groups in proteins. Using infrared spectroscopy, it is possible to determine the bond strengths, geometrical structures and chemical properties of protonated water clusters. In order to measure the spectrum of molecular vibrations in clusters it is, however, necessary...

2006-01-07 08:53:41

Boulder, Colo. -- A laboratory method developed for making and analyzing cold, concentrated samples of a mysterious "floppy" molecule thought to be abundant only in outer space has revealed new data that help explain the molecule's properties. The advance, described in the Jan. 6 issue of Science,[*] is a step toward overcoming a decades-old challenge in chemistry -- explaining reactions that occur within very cold clouds among the stars, and perhaps for developing new chemical processes....

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2005-07-16 16:32:39

New Haven, Conn. -- Free protons from acids associate with 1, 2 or 3 molecules of water and the structures can be identified by unique infrared laser spectrum signatures, according to a report in Science by Yale professor of chemistry Mark A. Johnson and his collaborators at Yale, the University of Pittsburgh and the University of Georgia. Acids yielding free protons are common in biological and chemical systems and the measurement of pH to determine acidity of an aqueous solution is a...


Word of the Day
vermicular
  • Like a worm in form or movement; vermiform; tortuous or sinuous; also, writhing or wriggling.
  • Like the track or trace of a worm; appearing as if worm-eaten; vermiculate.
  • Marked with fine, close-set, wavy or tortuous lines of color; vermiculated.
  • A form of rusticated masonry which is so wrought as to appear thickly indented with worm-tracks.
This word ultimately comes from the Latin 'vermis,' worm.
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