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  • 1
    Electronic Resource
    Electronic Resource
    Evolution of the microstructure in microcrystalline silicon prepared by very high frequency glow-discharge using hydrogen dilution (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 3137-3142 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A series of samples was deposited by very high frequency glow discharge in a plasma of silane diluted in hydrogen in concentrations SiH4/(SiH4+H2) varying from 100% to 1.25%. For silane concentrations below 8.4%, a phase transition between amorphous and microcrystalline silicon occurs. Microcrystalline silicon has been characterized by transmission electron microscopy (TEM) and x-ray diffraction. The medium-resolution TEM observations show that below the transition, the microstructure of microcrystalline silicon varies in a complex way, showing a large variety of different growth structures. For the sample close to the phase transition, one observes elongated nanocrystals of silicon embedded in an amorphous matrix followed at intermediate dilution by dendritic growth, and, finally, at very high dilution level, one observes columnar growth. X-ray diffraction data evidence a (220) crystallographic texture; the comparison of the grain sizes as evaluated from TEM observations and those determined using Scherrer's equation illustrates the known limitations of the latter method for grain size determination in complex microstructures. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372311
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  • 2
    Electronic Resource
    Electronic Resource
    EFFECT OF EXPOSURE TO THE AROMA OF A PRELOAD ON SUBSEQUENT INTAKE OF A FOOD WITH THE SAME AROMA (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of sensory studies 17 (2002), S. 0 
    Details
    ISSN: 1745-459X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: We tested the hypothesis that exposure to an aroma through a food or beverage in the first part of a meal (preload) would reduce the consumption of a food with the same aroma in the second portion of the meal, because of olfactory-specific satiety. In a first experiment, 35 young, normal-weight adults participated in 2 lunch sessions during which they consumed a fixed preload of either ranch-flavored or plain potato chips and sparkling water, followed by ad libitum consumption of a pasta salad with ranch dressing and sparkling water. In the second experiment, 33 subjects consumed a fixed preload of either lemon-flavored or plain sparkling water and pasta salad with ranch dressing, followed by ad libitum consumption of lemon-flavored yogurt and plain sparkling water. No difference was observed in the amount of food consumed (corrected for session order effects) as a function of prior exposure to ranch flavor in the chips or lemon flavor in the water. We conclude that exposure to a preload aroma may not have a significant effect on subsequent intake of a food with the same aroma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-459X.2002.tb00352.x
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  • 3
    Electronic Resource
    Electronic Resource
    The Association Behavior of Polystyryllithium, Polyisoprenyllithium, and Polybutadienyllithium in Hydrocarbon Solvents (1970)
    s.l. : American Chemical Society
    Macromolecules 3 (1970), S. 327-332 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma60015a011
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  • 4
    Electronic Resource
    Electronic Resource
    Millimeter-wave cavity ringdown spectroscopy (2002)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 73 (2002), S. 259-262 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Laser-based cavity ringdown techniques have demonstrated ultrahigh sensitivities for trace gas detection in the optical and infrared wavelength regions. We have investigated the applicability of the cavity ringdown technique in the millimeter wave region, which is rich in the rotational spectra of molecules. The millimeter-wave system uses a tunable Fabry–Perot cavity that is excited by a continuous-wave, phase-locked source at the W band; a fast PIN diode switch that turns off the excitation after the cavity is tuned to resonance; and a diode detector that records the resonance decay. Proof of concept has been established by measuring the ringdown times with absorbing materials in the cavity and comparing them with theoretical prediction. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1435846
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  • 5
    Electronic Resource
    Electronic Resource
    Improper actions and higher connectivity at infinity (2000)
    Springer
    Commentarii mathematici Helvetici 75 (2000), S. 171-188 
    Details
    ISSN: 1420-8946
    Keywords: Key words. Connectivity at infinity, Artin groups, duality groups.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract. Given an improper action (= cell stabilizers are infinite) of a group G on a CW-complex $ {\cal X} $ , we present criteria, based on connectivity at infinity properties of the cell stabilizers under the action of G that imply connectivity at infinity properties for G. A refinement of this idea yields information on the topology at infinity of Artin groups, and it gives significant progress on the question of which Artin groups are duality groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000140050118
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  • 6
    Electronic Resource
    Electronic Resource
    Pharmacokinetics of unlabelled and14C-labelled pindolol in uraemia (1974)
    Springer
    European journal of clinical pharmacology 7 (1974), S. 25-29 
    Details
    ISSN: 1432-1041
    Keywords: Pindolol ; uraemia ; pharmacokinetics ; β-blockade
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The elimination of pindolol in 25 patients with various degrees of renal failure has been studied after an intravenous dose of 3 mg. A linear correlation was not found between the elimination rate of pindolol and the endogenous creatinine clearance, and the half-life of the unchanged drug was independent of the severity of the renal failure. This implies greater metabolism of pindolol in anuric patients and the extrarenal elimination rate constantk mwas increased. Three patients with severe renal failure were given 3 mg14C-pindolol. They showed almost constant plasma levels of radio-activity for 6 h and then slow excretion with a half-life of 48 h, because of accumulation of metabolites in the blood. Up to 90% of the metabolites are glucuronides and sulphates which have no beta-blocking or other clinical activity. Thus, to produce beta-adrenergic blockade the same dose of indolol is required in healthy patients as in those with uraemia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00614386
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  • 7
    Electronic Resource
    Electronic Resource
    Pharmacokinetic criteria for the evaluation of retard formulations (1974)
    Springer
    European journal of clinical pharmacology 7 (1974), S. 429-432 
    Details
    ISSN: 1432-1041
    Keywords: Pharmacokinetics ; retard formulations ; retard quotients ; sustained release ; half-value duration ; dibenzepin hydrochloride
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In vivo criteria are proposed for the assessment of retard formulations. If the pharmacokinetics of the retard formulation tested and of the normal preparation are known, in either plasma or urine, two retard quotients can be defined which define the sustained release. One of the quotients refers to the width (half-value duration) and the other to the height of the plasma concentration time curve of the retard form as compared to the conventional preparation. From these criteria it is possible to draw useful conclusions about thein vivo quality of a retard formulation in an early stage of development of the dosage form. As a practical example the criteria have been applied to Noveril® 240 tablets (dibenzepin hydrochloride), the retard effect of which has made it possible to reduce the frequency of administration from three times daily to once a day.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00560355
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  • 8
    Electronic Resource
    Electronic Resource
    Long-term stiffening of neoprene pads for the Poseidon missile launch system (1972)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 16 (1972), S. 559-571 
    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: In a previous paper1 the development of neoprene formulations and mechanical designs to meet operational requirements for the Poseidon launch tube liner pads were presented. Subsequently, it was found that early development pads aged for three months at room temperature were ∼10% stiffer than the vendor's qualification compression-deflection (C—D) test values. The increase was attributed to a combination of normal elastomer recovery and continued crosslinking due to the original low state of cure of the pads. A program was designed to study the effect of postcure time and temperature on C—D recovery, the effect of carbon black loading on the C—D recovery, and room temperature and accelerated aging at elevated temperature on these effects. Values of the molecular weight between crosslinks (M̄c) were determined experimentally to establish the state of cure. The results of these experiments are presented and discussed. Recommendations are given for reducing C—D variation by modifying carbon black loading and/or postcure conditions.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1972.070160303
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  • 9
    Electronic Resource
    Electronic Resource
    Molded neoprene liner pads for the poseidon missile launcher (1971)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 15 (1971), S. 619-640 
    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: Neoprene formulations and mechanical designs have been developed to meet special operational requirements for the Poseidon Missile Launch System liner. The liner supports the missile in an aligned position, provides shock mitigation, reacts properly with the missile during launch, and damps vibrations. Operational requirements include static and dynamic compressive stiffness, damping, and water drainability. A mechanical design was evolved that utilized notched, prebuckled struts as supporting members. Compression-deflection characteristics were modified by simultaneous changes in geometrical design and polymer formulation. A study of the effects of variations in polymer compounding and mechanical design on the compressive stiffness, rate sensitivity of the compression-deflection characteristics, and vibrational damping is described. Mold release agents and their role in successful production are discussed.
    Additional Material: 23 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1971.070150310
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  • 10
    Electronic Resource
    Electronic Resource
    Studies on akroflex CD antioxidant loss from neoprene rubber. I. The determination of antioxidant content and the loss mechanism during aging (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 18 (1974), S. 3543-3553 
    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: An analytical procedure for determining the antioxidant (i.e., Akroflex CD) content in neoprene rubber has been developed. The method is based on the infrared absorption analyses of chloroform extractables from the cured rubber at 1600 cm-1 and 1300 cm-1. Good agreement is found between these two independent sets of measurements. In an attempt to elucidate the antioxidant loss mechanism found with neoprene, thermal aging studies were carried out over the temperature range of 80°-200°C. Using the infrared analytical procedure, antioxidant loss rates at the different temperatures were established. The activation energy value (5.1 kcal/mole) for the loss rate as well as other aging data suggest that the antioxidant is lost by a diffusion mechanism.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1974.070181205
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