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  • Polymer and Materials Science  (32)
  • Man/System Technology and Life Support  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Corrosion resistance and mechanical properties of nickel-bearing ferritic stainless steels (1977)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 28 (1977), S. 536-543 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Korrosinsbeständigkeit und mechanische Eigenschaften von nickelhaltigen ferritischen stählenZusatz von nickel zu ferritischen Stählen mit 25-28% Cr und 2-4% Mo verbessert die Schlagzähigkeit, vor allem bei Ni-Gehalten oberhalb 2%. Die Wirkung des Nickels nimmt bis zur untersuchten Obergrenze (4%) zu. Niobstabilisierte Stähle haben niedrigere Übergangstemperaturen als entsprechende titanstabilisierte. Stähle mit 4% Nickel müssen bei 1050°C angelassen werden, um Bildung intermetallischer Verbindungen zu vermeiden. Ferner wurde beobachte, dß Nickel die obere Schwellenenergie bei der Kerbschlagprüfung nach Charpy verringert und den scharfen Überzug zäh/spröd aus schalter. Ein deutlicher Einfluß des Nickels auf das Lochkorrosionspotential wurde nicht festgestellt; die Stähle in der Reihe 25 Cr-3,5 Mo-Ni--Ti hatten jedoch durchweg edlere Lochkorrosionspotentiale und besser Spaltkorrosionsbeständigkeit als die Stähle mit 28Cr und 2Mo (Ni Ti) Die Spaltkorrosionsbeständigkeit wird durch 1 order 2% Nickel verbessert, während höhere Gehalte ungünstig zu sein scheinen. Die kritische Passivierungsstromdichte in 1 n Schwefel-und Salzsäure wird durch Nickel stark verringert, weshalb die Beständigkeit dann erhöht ist. Durch 1% Nickel werden die angelassenen Stähle anfällig für Spannungsrißkorrosion in Magnesiumchloridlösung bei 140°C, während geschweißte Stähle mit 4% Nickel in siedender 25%tiger Natriumchloridlösung bei pH l Keine Rißbildung aufweisen.
    Notes: Additions of nickel to ferritic steels containing 25-28% Cr and 2-4% Mo increased the impact toguhness especially when more than 2% Ni was present. The effect of nickel content increased up to 4% Ni, the largest addition studied. Steels stabilized with niobium had lower transition temperatures then did corresponding steels stablizied with titanium. Steels containing 4% Ni required annealing at 1050 C to avoid intermetalic compounds. It was also noted that nickel reduced the upper shelf energy in the Charpy impact test and eliminated a sharp transition from ductile to brittle behaviour.No definite effect of nickel on pitting potential was pound but steels in the series 25Cr-3.5 Mo-Ni-Ti consistenly had more noble pitting potentials and greater resistance to crevice corrosion than the 28 Cr-2Mo-Ni-Ti steels. Nickel contents of 1 or 2% tended to improve crevice corrosion resistance while larger nickel contents were somewhat ditrimental. Nickel strongly reduced critical current densities for passivity both in l N H2SO4 and in l N HCL and yielded corresponding increases in resistance to corrosion by these acids. Although 1% Ni or more caused the annealed steels to be susceptible to stress corrosion cracking in MgCl2 boiling at 140 C, while the as-Welded steels containing 4% Ni did not crack in boiling 25% Nacl at pH 1.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19770280804
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  • 2
    Electronic Resource
    Electronic Resource
    Simple microtome for sectioning cellular foam (1967)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 11 (1967), S. 921-924 
    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 simple, inexpensive microtome was developed for sectioning polystyrene foam prepuff. The cell structure is well defined and wall thicknesses can be measured easily from photomicrographs prepared with the microtome.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1967.070110612
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  • 3
    Electronic Resource
    Electronic Resource
    A battery-powered, microprocessor-controlled, programmable function generator for field-based stripping voltammetry with conventional and microsized electrodes (1990)
    Weinheim : Wiley-Blackwell
    Electroanalysis 2 (1990), S. 195-202 
    Details
    ISSN: 1040-0397
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Battery-powered, complementary metal oxide semiconductor (CMOS) devices have been used to develop a programmable function generator. When used in conjunction with commercially available, battery-powered potentiostats or electrometers and recording devices, the technique of field-based direct current stripping voltammetry becomes available. The instrumental performance of a range of modular, battery-powered instruments has been evaluated with conventional and microsized electrodes and compared with ac-powered laboratory instruments using conventionally sized electrodes. Stripping experiments with the field-based instrument and with microelectrodes can be carried out under linear potential sweep conditions because the limit of detection is similar to that obtained with transient techniques at conventional sized electrodes. Other simplifications to the instrumentation and voltammetric procedures that are valuable in field-based studies (e.g., neither stirring nor deoxygenation of the solutions is required) also are achieved by using microelectrodes and are illustrated by the determination of copper in a river water sample.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140020305
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  • 4
    Electronic Resource
    Electronic Resource
    The ferrous chelates of polyaminocarboxylic acids as initiators in the emulsion polymerization of styrene. II (1960)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 42 (1960), S. 75-80 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The polyaminocarboxylic acids, ethylenediaminetetraacetic acid (EDTA), methylethylenediaminetetraacetic acid (MeEDTA), diethylenetriaminepentaacetic acid (DTPA), and cyclohexanediaminetetraacetic acid (CDTA) have been used to chelate the iron in the system ferrous iron-hydrogen peroxide when it is used as an initiator for the emulsion polymerization of styrene. In each case, the zero-order rate of polymerization decreased from pH 0.5, when it was identical to that in the absence of any chelating agent, to a minimum value in the pH region 3.5-6.5, after which it rose again. In acid solution the results are not the same as those anticipated from the redox potentials of the ferrous-ferric-chelating agent system at various pH values, and this has been found to be due to the dissociation of the iron chelate at a low pH.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1960.1204213909
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  • 5
    Electronic Resource
    Electronic Resource
    Decomposition of benzoyl peroxide in the presence of amines (1956)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 22 (1956), S. 181-183 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1956.1202210020
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  • 6
    Electronic Resource
    Electronic Resource
    Influence of needle holder jaw configuration on the biomechanics of curved surgical needle bendingThis research was supported by a generous gift from the Texaco Philanthropic Foundation, White Plains, New York. (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Biomaterials 1 (1990), S. 39-47 
    Details
    ISSN: 1045-4861
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jab.770010107
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  • 7
    Electronic Resource
    Electronic Resource
    Neue Erkenntnisse auf dem Gebiet der ferritischen rostfreien Stähle (1970)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 21 (1970), S. 336-342 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Recent developments in ferritic stainless steelsThe pitting resistance of ferritic stainless steels in HCl is visibly improved by Mo, in particular in the case of vacuum-melted material. In this context the ratio Cr:Mo = 25:2 is superior ta Cr:Mo = 17:3; addition of Mo prevents, beyond that, crevice corrosion. Ti increases resistance in the Strauß test but not in the Huey test, while Nb turns out to have a positive effect in either test. Steels containing Cr: Mo = 17:l are certainly still susceptible to pitting, but no longer to stress corrosion cracking in boiling MgCl2, solution; stress corrosion cracking is not observed in 55% boiling Ca(NO3)2, and 25% boiling NaOH, but after annealing at 980 °C intercrystalline corrosion takes place. The test duration required for establishing cracking susceptibility is considerably shorter with ferritic than with austenitic steels (100 and 1000 to 2000 hours respectively).
    Notes: Die Beständigkeit von nichtrostenden ferritischen Stählen gegen Lochfraß in HCl wird durch Mo deutlich verbessert, besonders, wenn es sich un vakuumerschmolzenes Material handelt. Hierbei ist die Kombination Cr :Mo 25 :2 besser als 17:3; der Mo-Zusatz verhindert außerdem Spaltkorrosion. Ti erhöht die Beständigkeit im Strauß-Test, nicht hingegen im Huey-Test, während Nb sich in beiden Medien als günstig erweist. Stäble mit Cr:Mo 17:l sind zwar noch anfällig fur Lochfraß, nicht mehr hingegen für Spannunnsrißkorrosion in kochendem MgCl2; auch in kochendem Ca-Nitrat (55%) oder NaOH (25%) tritt keine Spannungsrißkorrosion auf; doch wird nach Glühen bei bei 980°C interkristalline Korrosion beobachtet. Die zur Prüfung der Rißbildungsneigung erforderliche Versuchsdauer ist für die ferritischen Stähle wesentlich kürzer als für austenitische (100 gegen 100 bei 2000 Std).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19700210505
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  • 8
    Electronic Resource
    Electronic Resource
    Characterization of the A ⇄ B transition of DNA in fibers and gels by laser Raman spectroscopy (1975)
    New York : Wiley-Blackwell
    Biopolymers 14 (1975), S. 1245-1257 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Both Raman spectra and X-ray diffraction patterns have been obtained from oriented fibers of sodium deoxyribonucleic acid (Na-DNA) as a function of salt content and relative humidity. We have confirmed the previously reported X-ray results that, for oriented fibers, the A-form always exists between 75 and 92% relative humidity and that the conformation will change to the B-form at 92% relative humidity only if an excess (3-5%) of added salt is present. Oriented fibers containing low amounts of added salt remain in the A-type conformation at 92% relative humidity and higher. An exact correlation has been found between the familiar A- and B-type X-ray diffraction patterns of DNA fibers and the Raman spectra previously reported without X-ray verification from this laboratory for the A- and B-forms. In particular, a band at 807 cm-1 was always present when a fiber showed the A-type diffraction pattern, and this band shifts to 790 cm-1 in the B-form. Using the Raman spectrum to determine the specific conformation of DNA in samples less amenable to X-ray analysis, we have studied the A ⇄ Btransformation in unoriented fibrous masses of DNA and in concentrated, oriented gels. We find that in unoriented fibrous masses, the A ⇄ B transition always occurs at 92% relative humidity even at very low salt concentration (0-4%). However, in oriented DNA gels at low salt, the A-form can persist as a metastable state to concentration as low as 20% DNA. The origin of the bands at 807 and 790 cm-1 and the possible biological implications of these findings are discussed.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1975.360140613
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  • 9
    Electronic Resource
    Electronic Resource
    Selection of proper mounting media for examining heterogeneous copolymers with the phase microscopeProd. No. 1617 (1967)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 11 (1967), S. 2037-2039 
    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 technique for examining heterogeneous copolymers with the phase microscope is described. This method is based on the use of a mounting medium that displays selective solubility toward the constituent materials, thereby masking one or more phases in order to provide suitable phase contrast and isolation of the constituent to be examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1967.070111020
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  • 10
    Electronic Resource
    Electronic Resource
    A comparative study of the cylindrical wire, thin-layer, and wall-jet detector cells for the deterrnination of inorganic arsenic by ion exclusion chromatography with constant and pulsed amperometric detection (1992)
    Weinheim : Wiley-Blackwell
    Electroanalysis 4 (1992), S. 453-461 
    Details
    ISSN: 1040-0397
    Keywords: Flow detectors ; arsenic ; ion chromatography ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An ion chromatographic method for the separation and determination of As(III) empolying both constant and pulsed potential amperometric detection at platinum electrodes has been compared using cylindrical wire, thin layer, and wall-jet flow cell detectors. Operational parameters such as limit of detection, linear dynamic range, stability, reproducibility, and flow rate dependence are reported for each detector cell. The different detector designs have features which make them individually appealing, depending on the type of application being considered and which operational parameter is most important. However, the limit of detection with the wall-jet electrode of 1 × 10-9 M is superior to the other electrode designs (this may not necessarily be the case for other analytes) and makes this the preferred method for the determination of arsenic in bottled mineral water. Additionally, a lower limit of detection is achieved with constant potential amperometric detection than is the case with pulsed potential amperometric detection, which suggests that pulsed methods may not be advantageous for the detection of species at potentials where a large background current is exhibited at very positive potentials as required for the determination of arsenic.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140040411
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