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In chemistry, a molecule is generally an aggregate of at least two atoms in a definite arrangement held together by special forces. Generally, a molecule is considered the smallest particle of a pure chemical substance that still retains its composition and chemical properties.Molecule Definition Some pure chemical substances existing as liquids or solids (such as metals, molten salts, crystals, etc.), for which such a definition may not always be possible, are best understood as being composed of atoms, not recognizable molecules. In the molecular sciences, a molecule is a sufficiently stable, electrically neutral entity composed of two or more atoms.IUPAC Defintion of Molecule The concept of "monatomic molecule", i.e. a single-atom as found in noble gases, is used almost exclusively in the kinetic theory of gases.* Polyatomic ions may sometimes be usefully thought of as electrically-charged molecules.
History
Although the concept of molecules was first introduced in 1811 by Avogadro, and was accepted by many chemists as a result of Dalton's laws of Definite and Multiple Proportions (1803-1808), with notable exceptions (Boltzmann, Maxwell, Gibbs), the existence of molecules as anything other than convenient mathematical constructs was still an open debate in the physics community until the work of Perrin (1911), and was strenuously resisted by early positivists such as Mach. The modern theory of molecules makes great use of the many numerical techniques offered by computational chemistry. Dozens of molecules have now been identified in interstellar space by microwave spectroscopy. More on [ Molecule ]
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Microbiology :: Biology
VII Workshop em FÃsica Molecular e Espectroscopia inicia na próxima terça-feira, saiba mais sobre o evento http://www.wfme.ufba.br/
UdescJoinville (UDESC Joinville) Fri, 06 Nov 2009 19:48:44 -0000
VII Workshop em Física Molecular e Espectroscopia inicia na próxima terça-feira, saiba mais sobre o evento http://www.wfme.ufba.br/
Erratum: ERRATUM: Critical Reviews in Biochemistry and Molecular Biology , Early Online, Vol. 0, No. 0, Pages 1-1. http://bit.ly/37G8HI
CriticalReviews (InformaPharmaScience) Fri, 06 Nov 2009 19:39:32 -0000
Erratum: ERRATUM: Critical Reviews in Biochemistry and Molecular Biology , Early Online, Vol. 0, No. 0, Pages 1-1. http://bit.ly/37G8HI
RT @sinakes Great sliding animation comparing coffee bean / molecular world. http://bit.ly/2dFnHh Use the slider to zoom (via @andreascon)
symbiancoder (David) Fri, 06 Nov 2009 19:32:10 -0000
RT @sinakes Great sliding animation comparing coffee bean / molecular world. http://bit.ly/2dFnHh Use the slider to zoom (via @andreascon)
Check out @sciencegoddess's great video review of "The Manga Guide to Molecular Biology" http://snipurl.com/t3rug
nostarch (No Starch Press) Fri, 06 Nov 2009 19:29:03 -0000
Check out @sciencegoddess's great video review of "The Manga Guide to Molecular Biology" http://snipurl.com/t3rug
RT @sinakes: Great sliding animation comparing the size of a coffee bean to the molecular world. http://bit.ly/2dFnHh Use the slider to zoom
andreascon (Andreas Constantinou) Fri, 06 Nov 2009 19:28:38 -0000
RT @sinakes: Great sliding animation comparing the size of a coffee bean to the molecular world. http://bit.ly/2dFnHh Use the slider to zoom
Molecular biology and genetics it is then...
occhiverdi (Liz Levacy) Fri, 06 Nov 2009 19:21:47 -0000
Molecular biology and genetics it is then...
ExPASy Life Science Directory - Part of the ExPASy Molecular Biology Server, this extensive list contains almost exclusively pointers to information sources for life scientists with an interest in biological macromolecules.
Symmetry-breaking and Molecular Evolution - Explores the structural relationship between cosmological symmetry-breaking and the form of molecular evolution leading to biological systems on Earth. It thus forms an alternative to historical hypotheses in which the form of biogenesis is believed to be the product of a linked sequence of specific conditions, bridged by stochastic selection processes.
Betran's Lab - Research and publications on the origin of new genes, new functions, and their role in genome evolution, adaptation, and species differences.
Meta Description: [ Betran Lab ]
Farside Research Institute - The evolution group of the Institute of Molecular BioSciences at Massey University, Palmerston North, New Zealand.
How molecular biology opens up a 21st Century view of evolution - Transcript of chat with biochemist James Shapiro of the University of Chicago on his concept of natural genetic engineering at the cellular level.
Meta Description: [ The International Society for Complexity, Information, and Design (ISCID)
is a cross-disciplinary professional society that investigates complex
systems apart from external programmatic constraints like materialism,
naturalism, or reductionism. The society provides a forum for formulating,
te... ]
Molecular Phylogenetics and Evolution - Journal is dedicated to bringing Darwin's dream-to have fairly true genealogical trees of each great kingdom of Nature-within grasp. Provides a forum for molecular studies that advance the understanding of phylogeny and evolution.
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Stuart A. Kauffman Home Page - Abstracts and investigations on origins of life, beginning with autocatalytic sets through the mechanism of spontaneous organization.
Szostak Laboratory - Details work exploring the evolution of novel ribozymes (deoxyribo and ribonucleic acid catalysts) from populations of random sequences, attempting to shed light on the origins of biological catalysis.
Towards A New Theory Of Evolution - This site explores the possibility that genetic variation and natural selection are two sides of a unitary and simultaneous response to the struggle for existence, as recent experiments at Harvard and elsewhere on bacteria imply.
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