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  • 1
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    RNA-protein interactions in 30S ribosomal subunits: folding and function of 16S rRNA (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-05-19
    Description: Chemical probing methods have been used to "footprint" 16S ribosomal RNA (rRNA) at each step during the in vitro assembly of twenty 30S subunit ribosomal proteins. These experiments yield information about the location of each protein relative to the structure of 16S rRNA and provide the basis for derivation of a detailed model for the three-dimensional folding of 16S rRNA. Several lines of evidence suggest that protein-dependent conformational changes in 16S rRNA play an important part in the cooperativity of ribosome assembly and in fine-tuning of the conformation and dynamics of 16S rRNA in the 30S subunit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stern, S -- Powers, T -- Changchien, L M -- Noller, H F -- GM-17129/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1989 May 19;244(4906):783-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Thimann Laboratories, University of California, Santa Cruz 95064.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2658053" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Escherichia coli ; Models, Molecular ; Molecular Sequence Data ; Molecular Structure ; Nucleic Acid Conformation ; RNA, Ribosomal/*metabolism ; RNA, Ribosomal, 16S/*metabolism ; Ribosomal Proteins/*metabolism ; Ribosomes/physiology
    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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    Innovation economics. Where is Silicon Valley? (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-02-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guzman, Jorge -- Stern, Scott -- New York, N.Y. -- Science. 2015 Feb 6;347(6222):606-9. doi: 10.1126/science.aaa0201. Epub 2015 Feb 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sloan School of Management, Massachusetts Institute of Technology, Cambridge, MA 02142, USA. ; Sloan School of Management, Massachusetts Institute of Technology, Cambridge, MA 02142, USA. National Bureau of Economic Research, Cambridge, MA 02138, USA. sstern@mit.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25657229" 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
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  • 3
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    ENTREPRENEURSHIP. Linking and leveraging (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-06-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murray, Fiona -- Stern, Scott -- New York, N.Y. -- Science. 2015 Jun 12;348(6240):1203. doi: 10.1126/science.aac5843.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Massachusetts Institute of Technology, Cambridge, MA 02139, USA. National Bureau of Economic Research, Cambridge, MA 02138, USA. ; Massachusetts Institute of Technology, Cambridge, MA 02139, USA. National Bureau of Economic Research, Cambridge, MA 02138, USA. stern@mit.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26068830" 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
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  • 4
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    Microwaves: effect on thermoregulatory behavior in rats (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-12-07
    Description: Rats, with their fur clipped, pressed a lever to turn on an infrared lamp while in a cold chamber. When they were exposed to continuous-wave microwaves at 2450 megahertz for 15-minute periods, the rate at which they turned on the infrared lamp decreased as a function of the microwave power density, which ranged between 5 and 20 milliwatts per square centimeter. This result indicates that behaviorally significant levels of heating may occur at an exposure duration and intensities that do not produce measurable changes in many other behavioral measures or in colonic temperature. Further study of how microwaves affect thermoregulatory behavior may help us understand such phenomena as the reported "nonthermal" behavioral effects of microwaves.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stern, S -- Margolin, L -- Weiss, B -- Lu, S T -- Michaelson, S M -- New York, N.Y. -- Science. 1979 Dec 7;206(4423):1198-201.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/505008" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*radiation effects ; Body Temperature Regulation/*radiation effects ; Male ; *Microwaves ; Rats
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    An about 50,000-dalton protein in adrenal medulla: a common precursor of [Met]- and [Leu]enkephalin (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-27
    Description: A protein that may be an enkephalin precursor has been identified in extracts of bovine adrenal medulla. This protein (about 50,000 daltons) appears to contain seven copies of [Met]enkephalin and one copy of [Leu]enkephalin. Digestion with trypsin and carboxypeptidase B yields [Met]enkephalin and [Leu]enkephalin in a ratio of almost 7 to 1. The enkephalins were identified by chromatography and by their binding to opiate receptors. Some characteristics of several other adrenal peptides that may serve as intermediates in the biosynthesis of the enkephalins are presented.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewis, R V -- Stern, A S -- Kimura, S -- Rossier, J -- Stein, S -- Udenfriend, S -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1459-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384787" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Medulla/*analysis ; Animals ; Cattle ; Chromaffin Granules/*analysis ; Chromaffin System/*analysis ; Endorphins/*biosynthesis ; Enkephalin, Leucine ; Enkephalin, Methionine ; Enkephalins/*biosynthesis ; Molecular Weight ; Oligopeptides/analysis ; Peptide Fragments/analysis ; Protein Precursors/*analysis ; Proteins/*analysis ; Trypsin
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
    Electronic Resource
    Electronic Resource
    Rapid collisional evolution of comets during the formation of the Oort cloud (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 409 (2001), S. 589-591 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Oort cloud of comets was formed by the ejection of icy planetesimals from the region of giant planets—Jupiter, Saturn, Uranus and Neptune—during their formation. Dynamical simulations have previously shown that comets reach the Oort cloud only after being perturbed into ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35054508
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  • 7
    Electronic Resource
    Electronic Resource
    The evolution of comets in the Oort cloud and Kuiper belt (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 424 (2003), S. 639-642 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Comets are remnants from the time when the outer planets formed, ∼4–4.5 billion years ago. They have been in storage since then in the Oort cloud and Kuiper belt—distant regions that are so cold and sparsely populated that it was long thought that comets approaching the Sun were ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature01725
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  • 8
    Electronic Resource
    Electronic Resource
    Discovery of an aurora on Mars (2005)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 435 (2005), S. 790-794 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the high-latitude regions of Earth, aurorae are the often-spectacular visual manifestation of the interaction between electrically charged particles (electrons, protons or ions) with the neutral upper atmosphere, as they precipitate along magnetic field lines. More generally, auroral ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature03603
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  • 9
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    Impact craters on Pluto and Charon indicate a deficit of small Kuiper belt objects (2019)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2019
    Description: 〈p〉The flyby of Pluto and Charon by the New Horizons spacecraft provided high-resolution images of cratered surfaces embedded in the Kuiper belt, an extensive region of bodies orbiting beyond Neptune. Impact craters on Pluto and Charon were formed by collisions with other Kuiper belt objects (KBOs) with diameters from ~40 kilometers to ~300 meters, smaller than most KBOs observed directly by telescopes. We find a relative paucity of small craters 13 kilometers in diameter, which cannot be explained solely by geological resurfacing. This implies a deficit of small KBOs (1 to 2 kilometers in diameter). Some surfaces on Pluto and Charon are likely 4 billion years old, thus their crater records provide information on the size-frequency distribution of KBOs in the early Solar System.〈/p〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    Dunes on Pluto (2018)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2018-06-01
    Description: The surface of Pluto is more geologically diverse and dynamic than had been expected, but the role of its tenuous atmosphere in shaping the landscape remains unclear. We describe observations from the New Horizons spacecraft of regularly spaced, linear ridges whose morphology, distribution, and orientation are consistent with being transverse dunes. These are located close to mountainous regions and are orthogonal to nearby wind streaks. We demonstrate that the wavelength of the dunes (~0.4 to 1 kilometer) is best explained by the deposition of sand-sized (~200 to ~300 micrometer) particles of methane ice in moderate winds (〈10 meters per second). The undisturbed morphology of the dunes, and relationships with the underlying convective glacial ice, imply that the dunes have formed in the very recent geological past.
    Keywords: Geochemistry, Geophysics, Planetary Science
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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