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  • American Association for the Advancement of Science (AAAS)  (3)
  • 1995-1999  (3)
  • 1
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    Elongation of oligopeptides in a simulated submarine hydrothermal system (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-05
    Description: Oligomerization of a peptide was attempted in a flow reactor that simulated a submarine hydrothermal system. When fluid containing glycine repeatedly circulated through the hot and cold regions in the reactor, oligopeptides were made from glycine. When divalent ions (such as copper ions) were added under acidic conditions, oligoglycine was elongated up to hexaglycine. This observation suggests that prebiotic monomers could have oligomerized in the vicinity of submarine hydrothermal vents on primitive Earth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Imai, E -- Honda, H -- Hatori, K -- Brack, A -- Matsuno, K -- New York, N.Y. -- Science. 1999 Feb 5;283(5403):831-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of BioEngineering, Nagaoka University of Technology, Nagaoka 940-2188, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9933163" target="_blank"〉PubMed〈/a〉
    Keywords: Chromatography, High Pressure Liquid ; Copper/chemistry ; Diketopiperazines ; Dimerization ; *Evolution, Chemical ; Glycine/*chemistry ; Glycylglycine/chemical synthesis/chemistry ; *Hot Temperature ; Hydrogen-Ion Concentration ; Hydrolysis ; Mass Spectrometry ; Oligopeptides/*chemical synthesis/chemistry ; Piperazines/chemical synthesis ; *Pressure ; Temperature
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Excitation spectra of circular, few-electron quantum dots (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-05
    Description: Studies of the ground and excited states in semiconductor quantum dots containing 1 to 12 electrons showed that the quantum numbers of the states in the excitation spectra can be identified and compared with exact calculations. A magnetic field induces transitions between the ground and excited states. These transitions were analyzed in terms of crossings between single-particle states, singlet-triplet transitions, spin polarization, and Hund's rule. These impurity-free quantum dots allow "atomic physics" experiments to be performed in magnetic field regimes not accessible for atoms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kouwenhoven -- Oosterkamp -- Danoesastro -- Eto -- Austing -- Honda -- Tarucha -- New York, N.Y. -- Science. 1997 Dec 5;278(5344):1788-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉L. P. Kouwenhoven, T. H. Oosterkamp, M. W. S. Danoesastro, Department of Applied Physics and Delft Institute of MicroElectronics and Submicrontechnology, Delft University of Technology, Post Office Box 5046, 2600 GA Delf.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9388179" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Radiation studies (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-02-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Akiyama, M -- Kodama, K -- Mabuchi, K -- Ohara, J L -- Preston, D L -- Satoh, C -- Akahoshi, M -- Honda, T -- Soda, M -- New York, N.Y. -- Science. 1995 Feb 24;267(5201):1077.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7855582" target="_blank"〉PubMed〈/a〉
    Keywords: Government Agencies ; Humans ; International Cooperation ; Japan ; *Nuclear Warfare ; *Radiation Injuries ; Survivors ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
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