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  • Polymer and Materials Science  (140)
  • Recruitment  (47)
  • thema EDItEUR::N History and Archaeology::NH History::NHK History of the Americas  (37)
  • Analytical Chemistry and Spectroscopy
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  • 1
    Electronic Resource
    Electronic Resource
    Polyanhydride-imides (1976)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 55 (1976), S. 85-96 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Acht Imid-dicarbonsäuren wurden aus Trimellitsäureanhydrid, Pyromellitsäureanhydrid und verschiedenen aliphatischen Aminocarbonsäuren (HOOC—(CH2)n—NH2, n = 1,2,3,5) synthetisiert.Die entsprechenden Copolyimid-anhydride wurden nach den üblichen Methoden in Anwesenheit von Essigsäureanhydrid hergestellt1,2.Die Copolyimide haben eine aliphatisch-aromatische Struktur; ihre Eigenschaften wurden in Abhängigkeit der Struktur untersucht und durch IR-Spektren, Elementaranalyse und viskosimetrische Messungen charakterisiert. Löslichkeit, Hydrolysierbarkeit und Wärmestabilität wurden bestimmt.
    Notes: Eight imide-diacids were synthesized from trimellitic anhydride, pyromellitic anhydride and aminoacids of the formula HOOC—(CH2)n—NH2, with n = 1,2,3,5. From them, polyanhydride-imides were obtained following a general method of formation of polyanhydrides in the presence of acetic anhydride1,2.These co-polyimides have an aliphatic-aromatic structure and the relation between the general properties and the amount of the aliphatic part in the repeat unit was studied. IR spectroscopy, elemental analysis and viscosity measurements were used for the characterization. Studies of solubility, hydrolysis resistance and thermal properties were also made.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1976.050550107
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of different cross-linking systems on properties of highly saturated nitrile rubber compounds (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 54 (1994), S. 1073-1078 
    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: The peroxide curing of highly saturated nitrile rubber was analyzed. Reactions such as chain scission occurred that account for the drop in physical properties. The results are compared with an alternative cross-linking that is currently being assessed. With a new curing agent the chain-scission reaction was not present and the properties of the compounds were improved. Finally, an estimation of the free volume of the materials tested was attempted by using the WLF equation. © 1994 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1994.070540809
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  • 3
    Electronic Resource
    Electronic Resource
    A study of PVC stabilization with epoxides using dynamic pH determinations (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 24 (1979), S. 1777-1785 
    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: The activation energy (Ea) for the dehydrochlorination of PVC and PVC stabilized with an epoxide was determined by a method involving dynamic pH measurements. The Ea increase was 5 kcal/mole between unformulated PVC (Ea = 22.6 kcal/mole) and any of the other formulations (Ea = 27.7-28.6 kcal/mole). On the basis of this and data contained in the literature, research alternatives for the stabilization mechanism are proposed using model compounds.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1979.070240801
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  • 4
    Electronic Resource
    Electronic Resource
    On the magnetic behavior of the MA 956 superalloy (1997)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 37 (1997), S. 453-456 
    Details
    ISSN: 0021-9304
    Keywords: magnetic behavior ; ferritic superalloy ; alumina coatings ; thermal oxidation treatment ; surgical implants ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: MA 956 superalloy is a ferritic stainless material which develops a fine, dense, and well-adhered α-alumina layer upon heat treatment at elevated temperatures. This unique capability makes MA 956 attractive for surgical implants. In this work, the magnetic behavior of the material before and after thermal oxidation treatment required to develop the alumina layer is investigated. The thermal oxidation treatment yields a microstructure of elongated grains and a significant change in the texture. Despite these strong microstructural differences between the as-received and heat-treated materials, the hysteretic behavior is not greatly affected by them. MA 956 is a soft magnetic material irrespective of the material condition. The coercitive force and residual magnetization of the material are somewhat lower under heat-treated conditions than in the as-received condition. © 1997 John Wiley & Sons, Inc. J Biomed Mater Res, 37, 453-456, 1997.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Side-chain crystallinity, heat of melting, and thermal transitions in poly[N-(10-n-alkyloxycarbonyl-n-decyl)maleimides] (PEMI) (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 18 (1980), S. 2197-2207 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The heat of melting, the melting temperature Tm, and the sub-Tg transition temperature have been studied from -120°C to above Tm in a series of 11 poly[N-(10-n-alkyloxycarbonyl-n-decyl)]-maleimides (PEMI). Side-chains from ethyl to n-docosyl with n even have been included. The contribution to the heat of melting per methylene group shows that the hexagonal paraffin crystal modification is present in these poly(N-maleimides), in agreement with x-ray data for the same compounds. The enthalpy data show that only a part of the outer methylene groups are present in the crystalline aggregates. Furthermore, DSC traces exhibit a typical distribution of crystallite sizes, which become narrower as the side-chains become longer. The critical chain length needed to form a stable nucleus includes nine methylene groups in the outer part of the n-alkyl side-chain. The influence of the side-chain length and crystallinity on the γ-transition temperature of these polymers was also investigated. In the range where these polymers are essentially amorphous the sub-Tg transition temperature decreases continuously as the number of methylene groups in the side-chain increases. This transition is attributed to internal motion within the external side-group without any interaction with the main chain. This is presumably made possibly by the partial rotation of the oxycarbonyl group. We suggest that this transition is similar to the well known γ transition which has been attributed to various segmental motions in all ethylene copolymers and in all homopolymers containing a determined number of—CH2—units in the main-chain or in the side-chain. Estimates based on the chemical structure, yield a value for the γ transition of —CH2—similar to that measured by other methods in polyethylene and related materials.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.180181104
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  • 6
    Electronic Resource
    Electronic Resource
    The adsorption of tannic acid on hydrophilic cotton and its effect on the electrokinetic properties of this cellulose fibre in a cationic dye solution (1987)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 38 (1987), S. 96-100 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Meßergebnisse zur Adsorption von Tannin auf hydrophiler Baumwolle bei unterschiedlichen Temperaturen werden vorgestellt. Die Thermodynamik des Adsorptionsgleichgewichtes des Tannins wird untersucht. Mit zunehmender Temperatur nimmt die Menge des adsorbierten Tannins ab. Das Adsorptionsgleichgewicht des Tannins läßt sich durch eine Adsorptionsisotherme nach Freundlich beschreiben. Weiterhin wurde das Strömungspotential des Systems Cellulose/Tannin/Rhodamin-B-Lösung untersucht, und der Einfluß der Beize auf die elektrokinetischen Eigenschaften der mit einem kationischen Farbstoff gefärbten Cellulosefasern wurde analysiert. Das Verhalten des elektrokinetischen Potentials konnte im wesentlichen durch die Bildung von H-Brücken zwischen den phenolischen Hydroxylgruppen des Tannins und den Carboxygruppen der Cellulose sowie durch die elektrostatische Anziehung zwischen dem Farbstoff-Kation und der Faseroberfläche erklärt werden.
    Notes: Data on the adsorption of tannic acid on the hydrophilic cotton at different temperatures are presented. The thermodynamics of the adsorption equilibria of tannic acid is investigated, and it is established that the increase in temperature decreases the amount of tannic acid adsorbed. The adsorption equilibria of tannic acid are described by the Freundlich adsorption isotherm. Also, an experimental investigation on streaming potentials of cellulose/tannic acid/Rhodamine B solutions system is described and the effect of the mordant on the electrokinetic properties of cellulosic fibres dyed with a cationic dye is analyzed. The behaviour of the electrokinetic potential could be explained mainly by the H-bonds formed between the phenolic hydroxy groups of tannic acid and the carboxy groups of cellulose and by the electrostatic attraction between the dye cation and the surface of the fibre.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1987.010380121
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  • 7
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    Informe final. Asesoría integral para la toma de decisiones en pesca y acuicultura 2010. Actividad 1: recursos pelágicos pesquerías pelágicas centro sur, 2010. (2015)
    Instituto de Fomento Pesquero | Valparaíso, Chile
    Details
    Publication Date: 2021-05-19
    Description: El estudio tiene como objetivo la recolección, validación y análisis integrado de la información biológica y pesquera de los recursos pelágicos y la actividad extractiva realizada en la zona centro sur durante el año 2010.
    Description: The study aims at the collection, validation and integrated analysis of biological information and pelagic fishery resources and extractive activities conducted in the south central region in 2010 .
    Description: Unpublished
    Keywords: Landing statistics ; Size-at-age ; Length-weight relationships ; Stock assessment ; Trap fishing ; Bathymetric data ; Recruitment ; Biomass ; Pelagic fisheries ; Age determination ; Fishery industry ; Fishery regulations ; Trachurus murphyi ; Strangomera bentincki ; Engraulis ringens
    Repository Name: AquaDocs
    Type: Report , Non Refereed
    Format: 213pp. & Anexos
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  • 8
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    Informe final. Diagnóstico aptitud biopesquera, sistemas geográficos, implementación AMERB. (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 explotación de recursos bentónicos, durante el ejercicio del año 2005, 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: The present project analyzes and evaluates the biological - fishing information of the sectors and fishing resources under regime of administration ” areas of managing and exploitation of resources bentónicos, during the exercise of the year 2005, with the intention of having independent, trustworthy, reliable and opportune information, which allows to know in a periodic way the performance of the above mentioned regime and to support technically the modifications that are necessary.
    Description: Unpublished
    Keywords: Biomass ; Benthic environment ; Age determination ; Size-at-age ; Length-weight relationships ; Stock assessment ; Recruitment ; Landing statistics ; Crustacean culture ; Crustacean fisheries ; Trap fishing
    Repository Name: AquaDocs
    Type: Report , Non-Refereed , Article
    Format: 109pp. & Anexos
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  • 9
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    Informe final FIP 96-37. Análisis de la pesquería de merluza de cola en la zona sur-austral. (2015)
    Instituto de Fomento Pesquero | Valparaíso, Chile
    Details
    Publication Date: 2021-05-19
    Description: El presente informe tiene por objetivo caracterizar y analizar la pesquería de merluza de cola en el área comprendida al sur del paralelo 41°28,6' L.S.
    Description: This report aims to characterize and analyze the hoki fishery in the area bounded to the south of parallel 41 ° 28.6
    Description: Unpublished
    Keywords: Benthic environment ; Landing statistics ; Stock assessment ; Bathymetric data ; Trap fishing ; Biomass ; Age determination ; Length-weight relationships ; Size-at-age ; Sexual maturity ; Recruitment ; Spawning ; Salinity
    Repository Name: AquaDocs
    Type: Report , Refereed , Article
    Format: 97pp. & Figuras.
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  • 10
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    Informe final. Asesoría integral para la toma de decisiones en pesca y acuicultura, 2010. Actividad 7: Programa Observadores Científicos, 2010 /SUBPESCA/mayo 2011. (2015)
    Instituto de Fomento Pesquero | Valparaíso, Chile
    Details
    Publication Date: 2021-05-19
    Description: En el presente etudio se entregan los resultados obtenidos del análisis de la fauna acompañante de las pesquerías industriales pelágicas de la zona norte y centro sur, con motivo de la información requerida por la Secretaría Interina del acuerdo Subregional denominado ."South Pacific Regional Fisheries Management Organisation".
    Description: In the present study gives results of the analysis of bycatch of pelagic industrial fisheries in the northern and south-central, because of the information required by the Interim Secretariat of the agreement referred Subregional "South Pacific Regional Fisheries Management Organisation"
    Description: Unpublished
    Keywords: Trachurus murphyi ; Engraulis ringens ; Epigonus crassicaudus ; Genypterus maculatus ; Dosidicus gigas ; Hippoglossina macrops ; Cervimunida johni ; Pleuroncodes monodon ; Heterocarpus reedi ; Haliporoides diomedeae ; marine environment ; Sexual maturity ; Pelagic fisheries ; Trash fish ; Biomass ; Bathymetric data ; Recruitment ; Shellfish ; Seiners ; Trap fishing ; Demersal fish ; Net fishing ; Fishery resources ; Aquaculture ; Aquatic animals ; Biological data ; Stock assessment
    Repository Name: AquaDocs
    Type: Report , Non-Refereed , Article
    Format: 123pp.& Anexos
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