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  • Polymer and Materials Science  (9)
  • Benzodiazepines  (2)
  • Inertia-preserving updates  (2)
  • [abr] ATEE; acetyltyrosine ethyl ester  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Serine proteinase activation of latent human skin collagenase
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 125 (1984), S. 279-285 
    Details
    ISSN: 0006-291X
    Keywords: [abr] ATEE; acetyltyrosine ethyl ester ; [abr] DFP; di-isopropylphosphofluridate ; [abr] HEPES; 4-(2-hydroxyethyl)-1-piperazineethanesulphonic acid ; [abr] PMSF; phenylmethanesulphonylfluoride ; [abr] RDEB; recessive dystrophic epidermolysis bullosa ; [abr] SBTI; soya bean trypsin inhibitor ; [abr] TAME; tosylarginine methyl ester ; [abr] TLCK; tosyllysine chloromethylketone
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0006-291X(84)80365-4
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Serine proteinase activation of latent human skin collagenase
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 125 (1984), S. 279-285 
    Details
    ISSN: 0006-291X
    Keywords: [abr] ATEE; acetyltyrosine ethyl ester ; [abr] DFP; di-isopropylphosphofluridate ; [abr] HEPES; 4-(2-hydroxyethyl)-1-piperazineethanesulphonic acid ; [abr] PMSF; phenylmethanesulphonylfluoride ; [abr] RDEB; recessive dystrophic epidermolysis bullosa ; [abr] SBTI; soya bean trypsin inhibitor ; [abr] TAME; tosylarginine methyl ester ; [abr] TLCK; tosyllysine chloromethylketone
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0006-291X(84)80365-4
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Dose level effects of triazolam on sleep and response to a smoke detector alarm (1987)
    Springer
    Psychopharmacology 91 (1987), S. 397-402 
    Details
    ISSN: 1432-2072
    Keywords: Human ; Benzodiazepines ; Triazolam ; Dose level ; Sleep structure ; Arousal threshold ; Smoke detector alarm ; Heart rate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Thirty-six young adult, male subjects with sleep-onset insomnia were equally divided into placebo, 0.25 mg, and 0.5 mg triazolam groups to examine the effects of the hypnotic, with particular attention to dose level on efficacy, sleep stages, and awakening to a smoke detector alarm. On nights 1 and 4 of a five-consecutive-night protocol, a standard home smoke detector alarm was sounded during stage 2, 5 min after sleep onset, in slow wave sleep (SWS), and at the time of the early morning awakening. The alarm registered 78 dB SPL at the pillow. EEG arousal latency and reaction time to a button press were studied. Failure to awaken to three 1-min alarm presentations was scored as “no response.” Both dose levels produced similar reductions in sleep latency, decreases in SWS, increases in stage 2, and increases in sleep efficiency. Both dose levels showed similar sedative effects to the smoke alarm. Fifty percent of triazolam subjects failed to awaken on night 1 during SWS, and EEG arousal and response latencies were significantly slowed. Some drug tolerance or sensitization to the alarm was seen by night 4. By morning, all subjects were easily awakened on both nights. The 0.25 mg dose is clearly an effective dose level for both sleep efficacy and sedative effects to outside noise, which in some instances could pose potantial problems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00216003
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Benzodiazepines and caffeine: effect on daytime sleepiness, performance, and mood (1990)
    Springer
    Psychopharmacology 101 (1990), S. 160-167 
    Details
    ISSN: 1432-2072
    Keywords: Humans ; Benzodiazepines ; Caffeine ; Sleepiness ; Performance ; Mood
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In a double-blind parallel group design, 80 young adult males were divided into eight treatment groups. Subjects received 15 or 30 mg flurazepam, 0.25 or 0.50 mg triazolam, or placebo at bedtime, and 250 mg caffeine or placebo in the morning for 2 treatment days. Two objective (Multiple Sleep Latency Test and lapses) and two subjective (Stanford Sleepiness Scale and Visual Analog Scale) measures of sleepiness, five performance tests, and two mood measures (Profile of Mood Scale and Visual Analog Mood Scale) were administered repeatedly on both days. Significant treatment effects were found for sleepiness but not for performance or mood. Early morning caffeine significantly antagonized next day hypnotic-induced drowsiness and enhanced alertness in the subjects who received bed-time placebo. Flurazepam, 30 mg, subjects were more sleepy than all other groups. Although not significantly different, the flurazepam, 30 mg, group demonstrated a trend toward poorer performance and a more negative mood than all other groups. Caffeine most improved performance of this group. In all groups, sleepiness was greatest and performance and mood poorest in early morning trials and caffeine was most effective at this time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02244120
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Inertia-preserving secant updates (1989)
    Springer
    Journal of optimization theory and applications 62 (1989), S. 1-16 
    Details
    ISSN: 1573-2878
    Keywords: Inertia-preserving updates ; secant updates ; Broyden updates ; optimally conditioned updates ; SR1 update
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract A class of rank-two, inertia-preserving updates for symmetric matricesH c is studied. To ensure that inertia is preserved, the updates are chosen to be of the formH +=FH c F t, whereF=I+qr t, withq andr selected so that the secant equation is satisfied. A characterization is given for all such updates. Using a parameterization of this family of updates, the connection between them and the Broyden class of updates is established. Also, parameter selection criteria that can be used to choose the optimally conditioned update or the update closest to the SR1 update are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939626
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Inertia-preserving secant updates (1991)
    Springer
    Journal of optimization theory and applications 68 (1991), S. 203-203 
    Details
    ISSN: 1573-2878
    Keywords: Inertia-preserving updates ; secant updates ; Broyden updates ; optimally conditioned updates ; SRI update
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Corrections to the last two equations of Ref. 1 are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939942
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of polymeric steric stabilizers on the settling of alumina (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 52 (1994), S. 997-1004 
    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 effect of polymeric steric stabilizers on the dispersion stability of alumina was determined by settling experiments. The theoretical settling density was determined for alumina in a 90:10 wt% toluene-ethanol mixed solvent. Polymers evaluated were sulfonated polystyrenes, Shell's functionalized Kraton block polymers (styrene-hydrogenated diene), ICI's polymeric surfactants, homopolystyrene, a nonfunctionalized Kraton block polymer, and two Union Carbide Corporation silwet surfactants. The high-molecular-weight sulfonated polystyrene (60,000) containing a low level of sulfonation, functionalized Kraton block polymers, and one ICI polymeric surfactant were effective in improving the dispersion stability of the alumina. The percent of theoretical settling density for the “good” polymeric steric stabilizers ranged from 45 to 50%. The low-molecular-weight sulfonated polystyrene (10,000 MW), homopolystyrene, unfunctionalized Kraton block polymer, one ICI polymeric surfactant, and the silwet surfactants were ineffective in improving the dispersion stability of the alumina in the mixed solvent. © 1994 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1994.070520718
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Photodegradative wavelength dependence of thermally resistant organic polymers (1969)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 13 (1969), S. 1825-1832 
    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 wavelength dependence of photodegradation of three “high temperature” aromatic polyamide polymers has been very accurately determined by means of a fast grating spectrograph used in conjunction with a high pressure xenon arc. One of these polymers, the poly-(isophthalamide) of 4,4′-bis(p-aminophenyl)-2,2′bithiazole, was found to be degraded significantly by visible light, especially that of 4140 Å, wavelength. Both the poly-terephthalamide of 1,3-bis(3-aminobenzamide) benzene and Du Pont Nomex, also an aromatic polyamide, were damaged primarily by radiation in the near ultraviolet region. Degradation band maxima for these polymers were observed at 3700 Å, and 3600 Å, respectively. All three thermally resistant polymers were thus found to be degraded by light of much longer wavelength than that which is harmful to other common polymers.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1969.070130902
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Splat-cooled alloys in the Ag-Sn-Cu system (1974)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 8 (1974), S. 3-10 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Strength, dimensional change during setting, and corrosion resistance have been measured for amalgams prepared from splat-cooled alloys of different compositions in the Ag-Sn-Cu system. The amalgam with optimum values of these properties was made from the alloy containing 60 at. % Ag, 25 at. % Sn, and 15 at. % Cu. Tensile strengths for amalgams from this alloy were about 8000 psi, dimensional change during setting near zero, and corrosion resistance was good.X-Ray diffraction showed that the γ1 and γ2 phases formed during the early stages of setting but that the γ2 phase had essentially disappeared after about 24 hr. At the latter time Cu6Sn5 was present.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820080103
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  • 10
    Electronic Resource
    Electronic Resource
    Corrosion under stress of materials composing dental amalgam (1969)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 3 (1969), S. 569-576 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Corrosion potentials of materials composing dental amalgam have been measured in artificial saliva as the specimens were subjected to an increasing tensile load. Further, tensile tests have been carried out on specimens which had been previously subjected to controlled corrosion.The corrosion potentials of Cu, Ag, Zn, Ag2Hg3, Ag3Sn and finished dental amalgam showed only a slight increase in the anodic direction as the load increased. The potentials of Sn and Sn amalgams, on the other hand, showed a considerable increase.Most of the above results were explained as being a consequence of the rupture and repair of protective films as stress was applied or released. For Sn, however, it was necessary to postulate a complex attack by the corrodant to explain the large potential change.Of the phases of dental amalgam whose tensile strengths were measured after subjection to controlled corrosion, only the γ2 or Sn-Hg phase was affected. Its strength was lowered by corrosion, whether or not stress was applied.It was concluded that stress, as such, probably is not a direct factor in the corrosion of dental amalgam under oral conditions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820030403
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