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  • 1
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    The El Muerto "NYF" Granitic Pegmatite, Oaxaca, Mexico, and Its Striking Enrichment In Allanite-(Ce) and Monazite-(Ce) (2012)
    Mineralogical Association of Canada
    Details
    Publication Date: 2012-10-29
    Description: The El Muerto granitic pegmatite, of Grenville (Neoproterozoic) age, part of the Oaxacan Complex in southern Mexico, contains an exceptional development of HFSE-enriched accessory phases. We report here compositional data and textures involving the exotic minerals of this suite, in particular allanite-(Ce), perrierite-(Ce), monazite-(Ce), thorite, fergusonite-(Y), aeschynite-(Y), yttrium-rich betafite, polycrase-(Y), uranopolycrase, niobian rutile and a variant of thorutite. This pegmatite has the earmarks of a NYF suite, but is devoid of F. El Muerto is a member of an anorogenic anorthosite – mangerite – charnockite – granite (AMCG) suite, understood to be emplaced as a result of gravitational collapse of the lower crust following a collision. In common with other suites of anorogenic affiliation, we attribute the unusual enrichment in HFSE to a stage of metasomatic fertilization of a source in the lower to middle crust prior to its melting.
    Print ISSN: 0008-4476
    Topics: Geosciences
    Published by Mineralogical Association of Canada
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  • 2
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    A myocardial lineage derives from Tbx18 epicardial cells (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-05-16
    Description: Understanding the origins and roles of cardiac progenitor cells is important for elucidating the pathogenesis of congenital and acquired heart diseases. Moreover, manipulation of cardiac myocyte progenitors has potential for cell-based repair strategies for various myocardial disorders. Here we report the identification in mouse of a previously unknown cardiac myocyte lineage that derives from the proepicardial organ. These progenitor cells, which express the T-box transcription factor Tbx18, migrate onto the outer cardiac surface to form the epicardium, and then make a substantial contribution to myocytes in the ventricular septum and the atrial and ventricular walls. Tbx18-expressing cardiac progenitors also give rise to cardiac fibroblasts and coronary smooth muscle cells. The pluripotency of Tbx18 proepicardial cells provides a theoretical framework for applying these progenitors to effect cardiac repair and regeneration.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cai, Chen-Leng -- Martin, Jody C -- Sun, Yunfu -- Cui, Li -- Wang, Lianchun -- Ouyang, Kunfu -- Yang, Lei -- Bu, Lei -- Liang, Xingqun -- Zhang, Xiaoxue -- Stallcup, William B -- Denton, Christopher P -- McCulloch, Andrew -- Chen, Ju -- Evans, Sylvia M -- P41 RR005351/RR/NCRR NIH HHS/ -- T32 HL007444/HL/NHLBI NIH HHS/ -- England -- Nature. 2008 Jul 3;454(7200):104-8. doi: 10.1038/nature06969. Epub 2008 May 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Skaggs School of Pharmacy, University of California, San Diego, La Jolla, California 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18480752" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; *Cell Lineage ; Gene Expression Regulation, Developmental ; Heart/growth & development ; Lac Operon/genetics ; Mice ; Myocardium/*cytology/metabolism ; Myocytes, Cardiac/*cytology/metabolism ; Myocytes, Smooth Muscle/metabolism ; Pericardium/*cytology/*metabolism ; Stem Cells/*cytology/metabolism ; T-Box Domain Proteins/genetics/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 3
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    Alterations of single molecule fluorescence lifetimes in near-field optical microscopy (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-07-15
    Description: Fluorescence lifetimes of single Rhodamine 6G molecules on silica surfaces were measured with pulsed laser excitation, time-correlated single photon counting, and near-field scanning optical microscopy (NSOM). The fluorescence lifetime varies with the position of a molecule relative to a near-field probe. Qualitative features of lifetime decreases are consistent with molecular excited state quenching effects near metal surfaces. The technique of NSOM provides a means of altering the environment of a single fluorescent molecule and its decay kinetics in a repeatable fashion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ambrose, W P -- Goodwin, P M -- Keller, R A -- Martin, J C -- New York, N.Y. -- Science. 1994 Jul 15;265(5170):364-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17838037" 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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  • 4
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    Attogram detection limit for aqueous dye samples by laser-induced fluorescence (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-02-18
    Description: A modified flow cytometer has been used to detect attogram quantities of aqueous rhodamine 6G by laser-induced fluorescence analysis. A detection limit of 28 attograms (35,000 molecules) was obtained, nearly two orders of magnitude better than earlier measurements. The detection limit in concentration units was 1.4 x 10(-13) mole per liter. During the 1-second measurement period, the total volume sampled was 0.42 microliter. On average, only half a rhodamine 6G molecule was present in the 6-picoliter probed volume.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dovichi, N J -- Martin, J C -- Jett, J H -- Keller, R A -- New York, N.Y. -- Science. 1983 Feb 18;219(4586):845-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6823553" target="_blank"〉PubMed〈/a〉
    Keywords: Flow Cytometry/*methods ; Lasers ; Rhodamines/*analysis ; Xanthenes/*analysis
    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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  • 5
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    Teratogenic effects of alcohol in humans and laboratory animals (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-18
    Description: The teratogenicity of alcohol has been demonstrated in humans through clinical studies, behavioral studies, and epidemiologic studies, and in animals through controlled laboratory experiments. In humans exposed to alcohol during gestation the effects can range from fetal alcohol syndrome in some offspring of chronic alcoholic women to reduced average birth weight in offspring of women reporting an average consumption of two to three drinks or more per day. The behavioral effects of such exposure may range from mental retardation in children with fetal alcohol syndrome to milder developmental and behavioral effects in infants born to social drinkers. In animals, exposure to alcohol in utero may result in death, malformation, and growth deficiency as well as behavioral and developmental abnormalities. The mechanisms of impairment and related risk factors are yet to be elucidated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Streissguth, A P -- Landesman-Dwyer, S -- Martin, J C -- Smith, D W -- New York, N.Y. -- Science. 1980 Jul 18;209(4454):353-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6992275" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Drug-Induced ; Alcohol Drinking ; Brain/pathology ; Disease Models, Animal ; *Ethanol/pharmacology ; Female ; Fetal Alcohol Spectrum Disorders/*physiopathology ; Humans ; Hyperkinesis/chemically induced ; Infant, Low Birth Weight ; Infant, Newborn ; Pregnancy ; Sucking Behavior/drug effects ; *Teratogens
    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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  • 6
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    "Frozen" transition States: pentavalent carbon et Al (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-08-05
    Description: Organic ligands have been designed for the stabilization of specific geometries of compounds of nonmetallic elements. These ligands have made possible the isolation, or direct observation, of large numbers of trigonal bipyramidal organo-nonmetallic species. Many of these species are analogs of transition states for nucleophilic displacement reactions and have been stabilized by the ligands to such a degree that they have become ground-state energy minima. Ideas derived from research on these species have been applied to carbon species to generate a molecule that is an analog of the transition state for the associative nucleophilic displacement reaction. The molecule is a pentavalent carbon species that has been observed by nuclear magnetic resonance spectroscopy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martin, J C -- New York, N.Y. -- Science. 1983 Aug 5;221(4610):509-14.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17830935" 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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  • 7
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    Time: a new parameter for kinetic measurements in flow cytometry (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-01-11
    Description: The measure of time was used as an additional parameter on an existing flow cytometer to study the kinetics of enzyme activities and cell-stain interactions. By correlating all fluorescent signals from single cells with time, the dynamics of a reaction can be followed for several minutes. This advanced application of flow cytometry is easily implemented and can be incorporated into any flow cytometer that has two-parameter analysis capability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martin, J C -- Swartzendruber, D E -- New York, N.Y. -- Science. 1980 Jan 11;207(4427):199-201.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6153131" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cells, Cultured/enzymology ; Computers ; Cricetinae ; *Cytological Techniques ; DNA/metabolism ; Esterases/metabolism ; Kinetics ; Mice ; Spectrometry, Fluorescence/methods ; Staining and Labeling
    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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  • 8
    Electronic Resource
    Electronic Resource
    Identity of the chain-carrying species in halogenations with bromo- and chloroarylalkoxyiodinanes: selectivities of iodinanyl radicals (1979)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 101 (1979), S. 3060-3065 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00505a038
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Sulfuranes. 39. Syntheses and structure studies of stable difluoro- and dichlorosulfuranes. Apicophilicity orders in sulfuranes (1979)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 101 (1979), S. 3595-3602 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00507a027
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  • 10
    Electronic Resource
    Electronic Resource
    Synthesis and reactions of stable alkoxyaryltrifluoroperiodinanes. A "tamed" analog of iodine pentafluoride for use in oxidations of amines, alcohols, and other species (1979)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 101 (1979), S. 5294-5299 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00512a030
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