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  • 1
    Electronic Resource
    Electronic Resource
    Influence of secondary flows on the stability of chemically reacting systems (1988)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 34 (1988), S. 209-222 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A model is presented for convection and chemical reacton in porous media. An irreversible chemical reaction of arbitrary order is considered. Reactant depletion allows for basic solutions in either the kinetic or the diffusion regime. The cases of forced flow parallel to the lateral walls of the cavity and a closed system are addressed. A linear stability analysis of the basic states is performed and critical values of the thermal Rayleigh number for the onset of natural convection are determined. A dispersion relation is derived and a graphical representation of the linear stability analysis results is provided for typical values of the system parameters. Analytical predictions are verified by results obtained by numerical integration of the complete set of nonlinear partial differential equations. The effect of natural convection is discussed when the basic state is either in the kinetic or in the diffusion regime. For large gradients, associated with the diffusion regime, chemical reaction can drive free convection even for low values of the Rayleigh number. In forced flow systems, natural convection can change substantially the flow pattern of the system.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690340205
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Wall-cooled fixed-bed reactors: Parametric sensitivity as a design criterion (1989)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 35 (1989), S. 287-292 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Multitubular reactors of the heat exchanger type are commonly used to carry out highly exothermic reactions. Two of the main goals, when designing this type of reactor, are to guarantee a safe operation and to minimize the reactor length. Therefore, these concepts are used here as criteria for comparing the performance of the three most common cooling-medium flow arrangements. The analysis of the parametric sensitivity behavior, as well as that of some related measures, indicates that, at least from the steady-state standpoint, the cocurrent arrangement should be considered the most attractive alternative.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690350213
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  • 3
    Electronic Resource
    Electronic Resource
    Reaction front propagation in nonadiabatic exothermic reaction flow systems (1987)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 33 (1987), S. 819-833 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A general analysis of the reaction wave propagation in nonlinear exothermic nonadiabatic diffusion-convection-reaction systems is presented. The following topics are considered: approximation of temperature profiles based on the idea of infinitesimaly thin reaction front, estimation of maximum temperature, estimation of the conversion at the hot spot, a priori calculation of the front velocity, analysis of the self-ignition phenomena and their relation to wave propagation, and discussion of the effect of the heat loss parameter on the direction of propagation and shape of traveling waves. A comparison of the analytical work with exact numerical results reveals excellent agreement. The main objective of this paper is to provide a definite analysis of reaction wave propagation in reacting flow systems.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690330515
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  • 4
    Electronic Resource
    Electronic Resource
    Transport phenomena and kinetics in an extravascular bioartificial pancreas (1996)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 42 (1996), S. 2668-2682 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A bioartificial pancreas, consisting of immobilized islets encapsulated within hollow fibers, is investigated as an alternative treatment for insulin-dependent diabetes. A mathematical model is developed to determine whether this configuration of the bioartificial pancreas can yield an insulin response to a glucose challenge with the appropriate dynamics in diabetic humans. The model consists of the 2-D mass-conservation equations for glucose and insulin within the hollow fiber and capillaries. The equations contain terms for insulin-production kinetics by porcine islets and glucose-consumption kinetics. The boundary conditions account for transport resistances of the fiber membrane, the tissue surrounding the implant, and a thin film within the capillaries. The equations are coupled to a pharmacokinetic model of the circulatory system. The calculations show that an optimized design with this configuration will be feasible for human use and requires a total volume of 4.6 mL to reach the target insulin concentration in the bloodstream following a glucose challenge. The parameters and processes controlling the system performance are discussed.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690420928
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  • 5
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    Informe final. Programa de seguimiento del estado de situación de las principales pesquerías nacionales : Proyecto: investigación situación pesquería pelágica zona norte, 1995. (2015)
    Instituto de Fomento Pesquero | Valparaíso, Chile
    Details
    Publication Date: 2021-05-19
    Description: Se analizan los principales indicadores biológicos-pesqueros de las especies objetivos que sostuvieron la actividad extractiva de la zona norte, comparándose con la serie histórica reciente. Se entregan los resultados operacionales de la actividad de la flota, centrando el análisis en la captura, esfuerzo, rendimiento y en los indicadores biológicos más relevantes, como son la composición de talla-edad y los índices reproductivos y de reclutamiento.
    Description: It discusses the main biological indicators-fishing of target species that supported the extraction of the northern compared with recent time series. This paper gives the results of operations of the activity of the fleet, focusing the analysis on the catch, effort, performance and the most important biological indicators, such as size, age composition and reproductive and recruitment rates.
    Description: Unpublished
    Keywords: Pelagic fisheries ; Biomass ; Landing statistics ; Age determination ; Recruitment ; Spawning ; Stock assessment ; Size-at-age ; Length-weight relationships ; Salinity ; Sexual maturity ; Biological data ; Sardinops sagax ; Engraulis ringens ; Scomber japonicus
    Repository Name: AquaDocs
    Type: Report , Refereed , Article
    Format: 39pp. & Figuras
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  • 6
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    Informe final. Programa de seguimiento del estado de situación de las principales pesquerías nacionales: Proyecto: investigación situación pesquería pelágica zona centro sur, 1995. (2015)
    Instituto de Fomento Pesquero | Valparaíso, Chile
    Details
    Publication Date: 2021-05-19
    Description: Se analizan los principales indicadores biológicos-pesqueros de las especies objetivos que sostuvieron la actividad extractiva de la zona centro sur, comparándose con la serie histórica reciente. Se entregan los resultados operacionales de la actividad de la flota, centrando el análisis en la captura, esfuerzo, rendimiento y en los indicadores biológicos más relevantes, como son la composición de talla-edad y los índices reproductivos y de reclutamiento.
    Description: It discusses the main biological indicators-fishing of target species that supported the extractive activity of the south central region and compared to recent historical series. They deliver the operational results of the activity of the fleet, focusing the analysis on the catch, effort, performance and the most important biological indicators, such as height for age composition and reproductive and recruitment rates.
    Description: Unpublished
    Keywords: Pelagic fisheries ; Biomass ; Landing statistics ; Recruitment ; Spawning ; Stock assessment ; Age determination ; Size-at-age ; Length-weight relationships ; Salinity ; Sexual maturity ; Biological data ; Trachurus murphyi ; Sardinops sagax ; Engraulis ringens
    Repository Name: AquaDocs
    Type: Report , Refereed , Article
    Format: 68pp. & Figuras
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  • 7
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    Informe final. Programa de asistencia técnica : PREPROFO banco de machas de caleta Huasco (2015)
    Instituto de Fomento Pesquero | Valparaíso, Chile
    Details
    Publication Date: 2021-05-19
    Description: El presente informe tiene como objetivo asesorar a las organizaciones de pescadores arte sanales de Huasco en el manejo, explotación y comercialización del recurso macha provenientes de las áreas de playa larga y agua de luna.
    Description: This report aims to advise organizations of artisanal fishermen in the management Huasco, resource exploitation and marketing of macha from long beach areas and water of the moon.
    Description: Unpublished
    Keywords: Pelagic fisheries ; Biomass ; Bathymetric data ; Landing statistics ; Recruitment ; Spawning ; Stock assessment ; Size-at-age ; Length-weight relationships ; Sexual maturity ; Biological data ; Salinity ; Trap fishing ; Mesodesma donacium
    Repository Name: AquaDocs
    Type: Report , Refereed , Article
    Format: 68pp.& Figuras
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  • 8
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    Informe final. Investigación situación pesquerías bajo régimen de AMERB, 2006. (2015)
    Instituto de Fomento Pesquero | Valparaíso, Chile
    Details
    Publication Date: 2021-05-19
    Description: El presente proyecto analiza y evalúa la información biológico-pesquera de los sectores y recursos pesqueros bajo regimen de administración ”áreas de manejo y explotac ión de recursos bentónicos, durante el ejercicio del año 2006, con el propósito de disponer de información independiente, fidedigna, confiable y oportuna, que permita conocer de manera periódica el desempeño de dicho régimen y apoyar técnicamente las modificaciones que sean necesarias.
    Description: This project examines and evaluates the biological information-fishing and fisheries sectors under the regimen of administration management and exploitation areas for benthic resources during the fiscal year 2006 with the purpose of having independent, credible, reliable and timely, as to show on a regular basis the performance of the scheme and technical support necessary changes.
    Description: Unpublished
    Keywords: Benthic environment ; Biomass ; Age determination ; Size-at-age ; Length-weight relationships ; Stock assessment ; Trap fishing ; Recruitment ; Landing statistics ; Crustacean culture ; Crustacean fisheries
    Repository Name: AquaDocs
    Type: Report , Non-Refereed , Article
    Format: 146pp. & Anexos
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  • 9
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    Informe final. Seguimiento de las principales pesquerías chilenas 1995. (2015)
    Instituto de Fomento Pesquero | Valparaíso, Chile
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo analiza el ciclo anual y los cambios en el espacio y en el tiempo de la captura, esfuerzo pesquero y parámetros biológicos más relevantes de los principales recursos, conjuntamente con la estructura y tamaños de desembarque. Con la información económica se caracteriza el desempeño de la industria, los precios y niveles de transacción.
    Description: This paper analyzes the annual cycle and changes in space and time of catch, fishing effort and biological parameters most relevant to key resources, together with the structure and size of landing. With economic data characterized the performance of the industry, prices and transaction levels.
    Description: Unpublished
    Keywords: Biomass ; Trap fishing ; Landing statistics ; Recruitment ; Spawning ; Stock assessment ; Trawling ; Longlining ; Age determination ; Size-at-age ; Length-weight relationships ; Salinity
    Repository Name: AquaDocs
    Type: Report , Refereed , Article
    Format: 272pp.
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  • 10
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    Informe final. Seguimiento de las principales pesquerías chilenas 1995. (2015)
    Instituto de Fomento Pesquero | Valparaíso, Cie
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo analiza el ciclo anual y los cambios en el espacio y en el tiempo de la captura, esfuerzo pesquero y parámetros biológicos más relevantes de los principales recursos, conjuntamente con la estructura y tamaños de desembarque. Con la información económica se caracteriza el desempeño de la industria, los precios y niveles de transacción.
    Description: This paper analyzes the annual cycle and changes in space and time of catch, fishing effort and biological parameters most relevant to key resources, together with the structure and size of landing. With economic data characterized the performance of the industry, prices and transaction levels.
    Description: Unpublished
    Keywords: Salinity ; Lebu ; Biomass ; Landing statistics ; Recruitment ; Spawning ; Trap fishing ; Stock assessment ; Trawling ; Longlining ; Age determination ; Size-at-age ; Length-weight relationships
    Repository Name: AquaDocs
    Type: Report , Refereed , Article
    Format: 272pp.
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