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  • Polymer and Materials Science  (8)
  • ASFA_2015::I::Information scientists  (6)
  • Analytical Chemistry and Spectroscopy
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  • 1
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    País de Mares No. 6, 2018 (2022)
    Editorial Dimar | Bogotá D.C., Colombia
    Details
    Publication Date: 2022-08-18
    Description: Contenido: -- Colombia sede de la Cumbre Marítima Mundial 2019. -- Importancia de los servicios hidrográficos para la generación de la cartografía náutica del país y su aporte al desarrollo marítimo. -- Innovación: un patrimonio valioso para Cotecmar. -- Ana Lucia Caicedo Tumaqueña e investigadora de la Dirección General Marítima, Dimar. -- Información batimétrica para la exploración de hidrocarburos. -- La educación naval: un modelo de apropiación territorial. -- Una marina integral de frente a los intereses marítimos. -- El Cioh Pacífico socializó los avances del proyecto “Amenaza por Tsunami para el Pacífico nariñense”. -- Desde el fondo del mar, el ARC “Quindío” sigue al servicio de la ciencia y la soberanía de Colombia. -- “Boletín Científico Cioh”: las ciencias del mar a un clic. -- Expedición científica Pacífico 2018 Cabo Manglares. -- Actualidad e importancia de los dragados en el desarrollo portuario del país. -- Laminas Hr Gerdau, tres soluciones en un único producto. -- Terminal portuaria de regasificación de GNL, un respaldo para la generación de energía eléctrica en Colombia. -- El Río Magdalena, motor de desarrollo en la región Caribe. -- Transporte marítimo: principal aporte al comercio internacional. -- Un nuevo giro para las operaciones de búsqueda y rescate en la región, a través de desarrollos científicos de Dimar. -- La evolución de la señalización marítima y fluvial colombiana, y su proyección estratégica. -- Un puerto verde. -- Alas sobre el mar.
    Description: Published
    Description: Not Known
    Keywords: Investigación científica ; Puerto ; Seguridad marítima ; Historia ; Cartografía ; Hidrocarburo ; Formación ; ASFA_2015::C::Contamination ; ASFA_2015::C::Cartography ; ASFA_2015::E::Equipment ; ASFA_2015::I::Information scientists ; ASFA_2015::V::Vessels ; ASFA_2015::S::Safety ; ASFA_2015::P::Port installations
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 99pp.
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    PAPER (OA)
  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and polymerization of 2-alkylanilines (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 2123-2127 
    Details
    ISSN: 0887-624X
    Keywords: o-alklyaniline ; poly(o-alklyaniline) ; conducting polymer ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2-Alkylanilines with alkyl groups in the range of 4-15 carbon atoms were synthesized via a known method as well as via a more general path which should allow the introduction of a larger variety of substituted alkyl groups into the ortho position of aniline, e.g., alkenyl or OH, NH2, COOH, and phenyl functionality. Polymerization was found to be achievable according to a method previously described for unsubstituted aniline, i.e., chemically with Cu(ClO4)2 · 6H2O in acetonitrile. Intrinsic viscosities of the obtained poly(2-alkylaniline)s lay between 0.10 and 0.26 dL/g (97% H2SO4 at 30°C). The dc conductivity of the HCl salts decreased with increasing length of the alkyl side chains from 1 S/cm (polyaniline) over 3 X 10-4 S/cm [poly(2-butylaniline)] to 1 X 10-6 S/cm poly(tridecylaniline). Further characterization of the polymers were performed by means of UV/VIS/NIR-and-IR spectroscopy, in dilute solutions or as KBr pellets, respectively, and by solubility tests. © 1993 John Wiley & Sons, Inc.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1993.080310818
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  • 3
    Electronic Resource
    Electronic Resource
    The role of coupling agents on the mechanical properties of polymer-impregnated mortars (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 27 (1982), S. 2151-2165 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: An investigation has been carried out for determining the effect of coupling agents on the mechanical properties of polymer-impregnated mortars. Mortar specimens were impregnated with methyl methacrylate (MMA) monomer and α, α-azobis-isobutyronitrile initiator, and polymerized thermally in water. Three titanate coupling agents, KR-33CS, KR-55, and KR-138s, and one silane coupling agent, the A-174, were used for the investigation. Varying amounts of coupling agent were used in impregnating the mortars in situ or in pretreating the mortars with a solvent system. Bulk polymerization of MMA shows no appreciable influence of the coupling agents in the reaction kinetics; however, with the exception of KR-138S, all polymers obtained in the presence of coupling agents came out as insolble. Similar results were obtained for polymers extracted with acetone from mortars. The mechanical property results show an improvement of properties in mortars containing 5.0 vol% of KR-33CS and A-174 after impregnation in situ. A slightly better improvements of mechanical properties were obtained by pretreating the mortar specimens with acetone or toluene/xylene containing coupling agents. Microscopic observation of the fracture surface showed no noticeable difference in the surfaces prepared with and without coupling agents.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1982.070270626
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and tacticity characterization of a novel series of liquid crystalline side chain polymers with oligo(ethylene oxide) spacers (1987)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 188 (1987), S. 2001-2009 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A novel series of liquid crystalline side chain polymers containing oligo(ethylene oxide) spacers was synthesized and characterized. These included acrylates, methacrylates, and methacrylate copolymers. Although all polymers were polymerized free radically, NMR tacticity studies showed a systematic variation of the observed tacticity of the methacrylate series, the isotactic content decreasing with increasing spacer length. The data indicate that the spacer length and mesogenic group play a role in determining microstructure during polymerization.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1987.021880822
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  • 5
    Electronic Resource
    Electronic Resource
    Fast atom bombardment/collisional activation mass spectrometry of β-D-mannosyl-(1→4)-β-D-N-acetylglucosaminyl (1→N) urea and related compounds (1988)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 2 (1988), S. 95-97 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A new compound, obtained during the isolation of oligosaccharides from the urine of two brothers affected with inherited β-mannosidase deficiency, has been investigated using fast atom bombardment ionization and MS/MS techniques. The compound could be characterized as an N-acetylglucosamine molecule linked to a hexose and a urea molecule.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290020508
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  • 6
    Electronic Resource
    Electronic Resource
    Fast-atom bombardment tandem mass spectrometry of phosphohydroxylysine and related phosphohydroxy amino acids (1989)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 3 (1989), S. 76-78 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Phosphohydroxylysine a compound found in the urine of two patients with a possible inborn error of hydroxylysine metabolism, and related phosphohydroxycompounds were investigated with fast-atom bombardment tandem mass spectrometry techniques. This resulted in a reliable and quick identification method for phospho amino acids in general.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290030307
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  • 7
    Electronic Resource
    Electronic Resource
    Transmission mechanisms of inter-proton long-range couplings in substituted anisolesPart of a PhD Thesis (A.R.E.) to be presented to the University of Buenos Aires. (1981)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 17 (1981), S. 199-203 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Inter-proton long-range and ring couplings were measured in o-anisaldehyde and in seven disubstituted anisoles. In order to investigate the transmission mechanisms of long-range couplings with the methoxy group, partially restricted molecular orbital (PRMO) calculations were carried out within the FPT-INDO method on o-anisaldehyde. σ- and π-electron, and through-space transmitted components were separated. For the energetically favoured trans-OMe conformation a through-space component was found for the couplings of the methyl protons with the ortho-proton, and it was found that its sign, as well as its magnitude, depends on their relative positions. If free rotation, however, is assumed for the methyl group, the averaged value for this coupling constant is negative.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270170314
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  • 8
    Electronic Resource
    Electronic Resource
    Electrochemically mediated polymerization of 2-pentadecylaniline confined to a planar liquid-liquid interface (1995)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 196 (1995), S. 2011-2021 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Spreading, isotherms and polymerization of 2-pentadecylaniline at a planar aqueous electrolyte-organic interface were examined by monitoring the interfacial pressure employing the Wilhelmy-plate method. These results indicate the presence of monomer confined to the interface. Application of a voltage across the interface using stainless steel electrodes results in polymerization to form an electroactive polymer. The interfacial polymerization appears to be effected by metal ions formed by oxidation of the anode that have diffused into the aqueous electrolyte. This phenomenon is dependent on the nature of the electrode material as successful polymerization was not observed with other electrode materials. The polymer formed was soluble in polar organic liquids, was green in its reduced state and blue in its oxidized state, when oxidized and reduced chemically or electrochemically as a thin film. Cyclic voltammetry of the polymer indicates one reversible redox process suggesting that there are only two different oxidation states available, i.e., the equivalent to leucoemeraldine cannot be formed with poly(2-pentadecylaniline) in a thin film. However, the fully reduced yellow leucoemeraldine can be formed in chloroform solution by hydrazine reduction.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1995.021960620
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  • 9
    Electronic Resource
    Electronic Resource
    Novel mesomorphic order in side-chain polymers: Palisades of ribbons stacked in one dimension (1987)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 8 (1987), S. 321-324 
    Details
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1987.030080702
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  • 10
    Electronic Resource
    Electronic Resource
    Chemical polymerization and Langmuir-Blodgett techniques, 1. The polymerization of a monolayer of 2-pentadecylaniline (1990)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 11 (1990), S. 409-414 
    Details
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1990.030110812
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