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  • 1
    Electronic Resource
    Electronic Resource
    Weathering of rock, corrosion of stone and rusting of iron (1992)
    Springer
    Meccanica 27 (1992), S. 233-250 
    Details
    ISSN: 1572-9648
    Keywords: Stone ; Metals ; Weathering ; Corrosion ; Rusting ; Mechanics of masonry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Sommario Scopo del presente articolo e'presentare una rassegna dei fattori intrinseci ed estrinseci che influenzano la durabilita' della muratura. All'interno di tale rassegna si sviluppano altri temi, ed in particolare uno studio sui danni provocati dai cambiamenti di volume che accompagnano le modificatzioni biologiche, fisiche, chimiche. Nella prima parte dell'articolo ci si sofferma sulle modificazioni degli ammassi rocciosi durante le ere geologiche, e sul nesso tra i dati desunti da tale analisi e il problema della corroasione della pietra. La parte finale dell'articolo e'invece dedicata ad uno studio degli stati tensionali e fessurativi risultanti dall'espansione legata alla corrosione di elementi metallici di rinforzo posti all'interno della muratura. Benche' il danno strutturale sia l'argomento centrale della discussione, vengono anche presi in considerazione i problemi conness alla dissoluzione e alla comparsa di macchie, e si illustrano alcuni.
    Notes: Abstract The central purpose of this paper is to present a survey of the extrinsic and intrinsic factors which influence the durability of masonry. In approaching this subject other themes are developed; in particular a study is made of the damage due to the volume changes which accompany all biological, physical and chemical changes. Light can be thrown on the corrosion of stone from a knowledge of the weathering of rocks throughout geological time, and this aspect is explored in the opening section of the paper. The final part of the paper consists of a study of the stresses and cracking of stone which can result from the expansive rusting of iron or steel reinforcements. Although mechanical damage dominates the discussion, some comments are made on the staining and dissolution of stone and examples are illustrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00430048
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  • 2
    Electronic Resource
    Electronic Resource
    The fine structure of the epidermis of two species of salmonid fish, the Atlantic salmon (Salmo salar L.) and the brown trout (Salmo trutta L.) (1975)
    Springer
    Cell & tissue research 163 (1975), S. 535-543 
    Details
    ISSN: 1432-0878
    Keywords: Epidermis ; Salmonids ; Mucous cells ; Mucus ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fine structure of epidermal mucous cells of two species of salmonid fish has been described. Mucous cells are, next to filament-containing cells, the most commonly encountered cells in fish epidermis. The development of the cells as they progress to the periphery has been characterised. They are initially difficult to distinguish from filament-containing cells: later, they can be recognised by the presence of much smooth-surfaced E.R. The mucigenesis and the subsequent secretion of mucus has been observed and it is essentially comparable to that which occurs in the mucous cells of the mammalian intestine. The mucous layer of the epidermal surface seems to mainly comprise of the products of these mucous cells and the “cuticle” seen in other species has not yet been observed in the salmonid species investigated here.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00218498
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  • 3
    Electronic Resource
    Electronic Resource
    The fine structure of the epidermis of two species of salmonid fish, the atlantic salmon (Salmo solar L.) and the brown trout (Salmo trutta L.) (1975)
    Springer
    Cell & tissue research 157 (1975), S. 553-565 
    Details
    ISSN: 1432-0878
    Keywords: Epidermis ; Salmonids ; Regional differences ; Filament-containing cells ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fine structure of the epidermis of two species of salmonid fish has been described. Gross characteristics have been noted along with many apparent differences in the epidermis of different body regions of the fish. The major cell type is the filamentcontaining cell and this has been described in detail. The major inclusions of the cell are the tonofilaments. Differences in basal, mid-epidermal and peripheral filament-containing cells have been characterised. Comparisons of fish epidermis with that of other vertebrates has been made.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222607
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  • 4
    Electronic Resource
    Electronic Resource
    Bestimmungen und Trennungen seltener Metalle (1937)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 109 (1937), S. 39-55 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01370742
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  • 5
    Electronic Resource
    Electronic Resource
    Miscible blends of poly(aryl ether ketone)s and polyetherimides (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 35 (1988), S. 1877-1891 
    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: A new class of high performance engineering resins, poly(aryl ether ketone)s, has emerged with a property balance not offered by existing polymeric materials. Blends of poly(aryl ether ketone)s with other polymers have not been described in the open literature, although several patents have revealed interesting and important properties of certain blend combinations. Ultem polyetherimide has been found to be miscible over the entire composition range and as a consequence is a very effective heat distortion temperature builder, particularly if the poly(aryl ether ketone) is allowed to crystallize. Crystallization kinetics and mechanical properties were studied as a function of blend composition and poly(aryl ether ketone) melting point. The blends exhibited a maximum in toughness at intermediate compositions along with an accompanying maximum in poly(aryl ether ketone) crystallinity. The chemical resistance of the polyetherimide is significantly improved with the addition of a poly(aryl ether ketone). In organic chemicals, the improvement was expected when tensile stress was plotted vs. log time to rupture. However, in aqueous bases, the resistance of the blends was much greater than anticipated. This property profile suggests that these blends will be useful as thermoplastic composite matrix resins.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1988.070350713
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of the t-butyl substituent on the miscibility of polyarylates with polyamides (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 46 (1992), S. 745-748 
    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: Amorphous polyarylates derived from 12-50 mol % of a t-butyl-substituted diacid, e.g., 5-t-butylisophthalic acid, exhibit miscibility with the amorphous phase of polyamides having aromatic and aliphatic character. Equally critical to blend miscibility is the aliphatic/aromatic carbon atom ratio (exclusive of the amide functionality) of the polyamide. An aliphatic/aromatic carbon atom ratio (α) greater than 1.4 but less than 2.5 is necessary. © 1992 John Wiley & Sons, Inc.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1992.070460422
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  • 7
    Electronic Resource
    Electronic Resource
    A comparison of miscible binary blend interaction parameters measured by different methods (1983)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 23 (1983), S. 676-681 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: Miscible blends of the polyhydroxy ether of bisphenol-A, Phenoxy, with a series of aliphatic polyesters were studied using melting point depression analysis and sorption to obtain the Flory-Huggins polymer-polymer interaction parameter, B. The B values obtained from these measurements were found to agree well in sign, magnitude, and variation with ester repeat structure and to also agree well with B values measured calorimetrically for mixtures of low molecular weight compounds with structures which are analogous to those of the polymers. These comparisons suggest that the same mechanisms are responsible for the exothermic heats of mixing measured directly for the analog compounds and indirectly for the miscible polymer blends. For this general system, evidence is provided which suggests that hydrogen bond formation between the hydroxyl group on Phenoxy and the ester moiety is probably responsible for the exothermic interactions and polymer blend miscibility observed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760231207
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  • 8
    Electronic Resource
    Electronic Resource
    Macro- and microsegregation of Zn in bridgman-grown CdZnTe (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 5 (1995), S. 101-108 
    Details
    ISSN: 1057-9257
    Keywords: CdZnTe ; Zn segregation ; Bridgman ; ACRT ; substrates ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: One of the remaining problems in the use of CdZnTe material as substrates in liquid phase epitaxy (LPE) of CdxHg1-xTe (CMT) layers is that of variation in lattice matching, i.e. Zn content, across substrates. This wil become increasingly important in the future as larger focal plane arrays of infrared detectors are required. The basic Bridgman growth process for CdTe/Cd0.96Zn0.04Te has been extended by applying the accelerated crucible rotation technique (ACRT). A marked reduction in axial Zn segregtion is seen in 50 mm diameter ACRT material, but this effect is smaller in the case of 75 mm diameter crystals. Radial variations in Zn content are small in both sizes of crystal, demonstrating the benefits obtained from ACRT stirring. Both macro- and microsegregation effects have been studied in these crystals in an attempt to understand the growth mechanism. Zinc distributions have been assessed by near-infrared transmission, X-ray lattice parameter measurements, atomic absorption spectrometry (AAS) and Auger electron spectrometry (AES). The last technique was used for the microsegregation studies, while AAS provides the absolute calibration for Zn content. Comparisons with segregation behaviour found in the literature will be given. It will be shown that the low temperature gradient and low growth rate lead to a degree of supercooling in the first-to-freeze region and this leads to significant Zn segregation in both radial and axial directions. As the crystals reach full diameter, the radial variation is decreased, presumably by the action of the ACRT, and axial segregation is also reduced.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/amo.860050206
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  • 9
    Electronic Resource
    Electronic Resource
    Miscible binary blends containing the polyhydroxy ether of bisphenol-a and various aliphatic polyesters (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 27 (1982), S. 839-855 
    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: Blends of the polyhydroxy ether of bisphenol-A, Phenoxy, with the polyesters poly(1,4-butylene adipate), poly(ethylene adipate), poly(2,2-dimethyl-1,3-propylene succinate), poly(2,2-dimethyl-1, 3-propylene adipate), poly(1,4-cyclohexane-dimethanol succinate), and poly(∊-caprolactone), are found to exhibit the single, composition-dependent glass transition temperatures characteristic of miscible systems. Phenoxy blends containing poly(ethylene succinate), poly(hexamethylene succinate), or poly(pivaloactone) were found to be immiscible. Blend interaction parameters, obtained from analysis of the melting-point depressions observed for miscible blends containing crystallizable polyester components, are found to vary with polyester chemical structure so as to suggest an optimum density of ester groups in the polyester chain for achieving maximum interaction with Phenoxy. Too many or too few ester groups lead to immiscible polyester-Phenoxy blends.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1982.070270305
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  • 10
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    Bestimmungen und Trennungen seltener Metalle (1937)
    Springer
    Details
    Publication Date: 1937-01-01
    Print ISSN: 1618-2642
    Electronic ISSN: 1618-2650
    Topics: Chemistry and Pharmacology
    Published by Springer
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