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  • 1
    Electronic Resource
    Electronic Resource
    Stereochemistry of the photoinduced addition of nucleophiles to the enone of decompostin (1985)
    s.l. : American Chemical Society
    The @journal of organic chemistry 50 (1985), S. 2865-2867 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00216a011
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A fast gauge for energy flux density measurement (1990)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 165-170 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Herein the design and characterization of a fast energy flux density gauge are described. The gauge is based on a thermoelectrical pair with the junction made of a thin layer of silver. High absorptivity is attained by an electrolytic deposit of platinum black on the silver coat. Dynamic calibration gives a response time below 100 μs. Computer methods to obtain the energy flux density from temperature-time history were evaluated: constant thermophysical properties of the thermoelectrical pair can be assumed in the ignition studies for which the gauge has been developed. The results of the tests performed with igniters of pelleted boron/potassium nitrate and black powder, used in solid propellant ignition, are shown. The gauge developed can be applied to fast processes which require small response time. The gauge does not need previous calibration, it is resistant to vibrations and accelerations, and at the same time it is small in size, economical, and easy to build. Changing the substrate or the thermoelectrical pair, the applications and ranges of temperature can be extended.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141868
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  • 3
    Electronic Resource
    Electronic Resource
    Natural Antioxidants for Preventing Color Loss in Stored Paprika (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 62 (1997), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Oxidative carotenoid degradation causes paprika color loss during storage. Ethoxyquin, a synthetic antioxidant, is used in the spice industry to prevent carotenoid loss during postharvest handling. However, ethoxyquin treated paprika is unacceptable for some markets and consumers. Naturally derived antioxidants, i.e., rosemary extracts, ascorbic acid, δ-tocopherol, and mixed tocopherols were tested as color protectants in two paprika cultivars. Extractable color, surface color and carotenoid concentrations were determined before storage and then monthly. After 4 mo storage at ambient temperature, the control treatment lost 63% of the initial extractable color, the δ-tocopherol treated samples lost 32%, and the ethoxyquin lost 6% color.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1997.tb15027.x
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  • 4
    Electronic Resource
    Electronic Resource
    Direct determination of microstructural parameters from the X-ray diffraction profile of a crystal with stacking faults (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 34 (2001), S. 730-736 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The practical aspects of a recently deduced formalism for the direct solution of the powder diffraction pattern of a layer crystal are addressed. It is shown that the obtained solution is particularly well suited to combination with a deconvolution procedure based on a series development of the peak profile. The influence of noise and step size on the obtained solution is discussed. Computer simulation is used to assess the robustness of the proposed procedure. The developed procedure is applied to a powder sample of Y2Co17 that is affected by planar disorder.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889801014091
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  • 5
    Electronic Resource
    Electronic Resource
    Hybridization of electronic states in quantum dots through photon emission (2004)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 427 (2004), S. 135-138 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The self-assembly of semiconductor quantum dots has opened up new opportunities in photonics. Quantum dots are usually described as ‘artificial atoms’, because electron and hole confinement gives rise to discrete energy levels. This picture can be justified from the shell structure ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature02109
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  • 6
    Electronic Resource
    Electronic Resource
    Stochastic models of space priority mechanisms with Markovian arrival processes (1992)
    Springer
    Annals of operations research 35 (1992), S. 269-296 
    Details
    ISSN: 1572-9338
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract In this paper, we study a single-server queue with finite capacity in which several space priority mechanisms are implemented. The arrival process is the general Markovian arrival process (MAP) which has been used to model the bursty arrival processes commonly arising in communication applications. The service times are generally distributed. These buffer mechanisms enable the Asynchronous Transfer Mode (ATM) layer to adapt the quality of the cell transfer to the quality of service requirements of the specific broadband ISDN services and to improve the utilization of the network resources. This is done by a selective discarding of cells according to the class they belong to. Computable expressions for various performance parameters are obtained. Numerical results are given for the case of a two-state Markov-modulated Poisson process (MMPP) and deterministic service times. The values derived can be used to evaluate the benefits of using priorities in an ATM network when the traffic is bursty and to make a comparative study of the buffer mechanisms. These results extend the models previously developed, which were limited to Poisson arrivals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02024994
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  • 7
    Electronic Resource
    Electronic Resource
    Fluorescence behaviour of polychlorinated dibenzofurans in organized molecular systems. Analytical applications (1995)
    Springer
    Microchimica acta 118 (1995), S. 185-196 
    Details
    ISSN: 1436-5073
    Keywords: spectrofluorimetry ; 2,3,7,8-tetrachlorodibenzofuran ; polyoxyethylene (10) lauryl ether ; C12E10 ; polychlorinated dibenzofurans ; micellar media ; sea water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Fluorescence characteristics of several polychlorinated dibenzofurans (PCDFs) of toxicological and environmental interest in the presence of cationic, anionic, neutral surfactants, α-cyclodextrin and β-cyclodextrin were examined. The fluorescence enhancement of 2,3,7,8-tetrachlorodibenzofuran (TTCDF) in the presence of polyoxyethylene(10) lauryl ether (C12E10) medium was utilized to establish a sensitive spectrofluorimetric method for determination of TTCDF. The optimization of variables as the concentration of surfactant, percentage of organic solvent and temperature, and effect of possible interferences from other PCDFs, polychlorinated dibenzo-p-dioxins (PCCDs), polychlorinated biphenyls (PCBs) and Arochlors were investigated. The method, which has a detection limit of 1.30 ng ml−1, has been applied to the determination of TTCDF in sea water with acceptable recoveries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01244358
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  • 8
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    Taxonomic structure, abundance and distribution patterns of coral reef fish larvae across an inshore-offshore fradient in La Parguera, southwest coast Puerto Rico (2021)
    In:  http://aquaticcommons.org/id/eprint/13212 | 9596 | 2014-01-28 13:22:03 | 13212 | Gulf and Caribbean Fisheries Institute
    Details
    Publication Date: 2021-07-09
    Keywords: Fisheries ; GCFI
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 991-1002
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  • 9
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    Apuntes sobre la circulación costera en el Caribe noroccidental colombiano (2020)
    Details
    Publication Date: 2021-05-19
    Description: El transporte superficial de masas de agua en las inmediaciones de la Península de la Guajira es dominada alternamente por la corriente ciclónica en el extremo suroccidental del Mar Caribe y por una surgencia costera inducida por los vientos Alisios. Las observaciones del ciclo anual de vientos y de las variaciones en Salinidad superficial causadas por surgencia costera y por el flujo del Río Magdalena documentan las variaciones estacionales en la localización de la zona de confluencia entre las aguas del giro ciclónico y aquellas del eje principal de la corriente del Mar Caribe.
    Description: Surface transport of waters in the region off the Guajira Península (Colombia) is dominated alternately by a major cyclonic current in the southwestern comer of the Caribbean Sea and by wind induced coastal upwelling in a yearly cycle. Observation of the yearly wind cycle and of surface salinities as affected by upwelling and by runoff from the adjacent Magdalena River provide a record of seasonal variations in the location of the zone of confluence between waters from the cyclonic current and waters from the main axis of flow of the Caribbean Sea.
    Description: Published
    Keywords: Vientos ; Precipitación ; Salinidad ; ASFA_2015::P::Physical oceanography ; ASFA_2015::M::Meteorology
    Repository Name: AquaDocs
    Type: Journal Contribution , Not Known
    Format: Pp.3-8
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  • 10
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    País de Mares No. 9, 2020 (2022)
    Ed. Dimar | Bogotá D.C., Colombia
    Details
    Publication Date: 2022-08-17
    Description: Contenido -- Calado vs. Profundidad, actores importantes del río -- Drummond avanza con sus trabajadores y comunidades en tiempos de crisis -- La instrumentación oceanográfica en la consolidación del territorio marítimo -- Se construirán en Colombia nuevos buques para la investigación científica y la seguridad marítima -- Diálogo con la primera mujer jefe del Servicio Hidrográfico Nacional de Colombia. -- El canal interoceánico nivel Atrato-Truandó y las hidroeléctricas del Atrato pueden cambiar la suerte del país. -- Gestión de la Autoridad Marítima Colombiana ante la pandemia por la COVID-19. -- Conpes: Colombia potencia bioceánica sostenible 2030. -- Educación marítima y fluvial 2.0: el reto offshore para el Caribe colombiano -- La importancia de un pensamiento marítimo estratégico en un país bioceánico -- Agenda Dimar -- Batimetría asistida por satélite, complementos para la cartografía batimétrica en el Pacífico colombiano -- Coberturas vegetales asociadas a la franja costera del Valle del Cauca y su importancia ecológica y administrativa -- La microbiología como portal para conocer el grado de contaminación marina en la Antártica -- Dimar en Imágenes -- La navegación electrónica -- Adopción del Código de Estabilidad sin Averías (Código IS, 2008) -- ¿Qué es Pianc? Y la importancia de su fortalecimiento en Colombia -- Servicio meteorológico marino, una necesidad para las funciones de Estado Ribereño -- Las playas, más que un ordenamiento, una oportunidad -- La relevancia del ordenamiento marino-costero en el contexto de la planificación espacial marina en Colombia -- Modelo integrado de gestión de zonas costeras: eje estratégico de las actividades marítimas seguras y sostenibles en las playas turísticas de Cartagena -- Evolución legislativa referente al patrimonio cultural sumergido en Colombia -- #LéxicoDelMar
    Description: Published
    Description: Not Known
    Keywords: Investigación científica ; Puertos ; Seguridad en la navegación ; Hidrocarburos ; Río ; Buque ; Contaminación Marina ; Litorales ; Medio ambiente ; ASFA_2015::C::Contamination ; ASFA_2015::G::Geography ; ASFA_2015::P::Port installations ; ASFA_2015::S::Safety ; ASFA_2015::V::Vessels ; ASFA_2015::I::Information scientists
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 108pp.
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