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  • 1
    Electronic Resource
    Electronic Resource
    Effect of Inflammation of Enteric Nerves Cytokine-Induced Changes in Neurotransmitter Content and Release (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 664 (1992), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1992.tb39780.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Economics of Disease-Loss Management (1976)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Phytopathology 14 (1976), S. 381-403 
    Details
    ISSN: 0066-4286
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.py.14.090176.002121
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on the setting behaviour of sealants using a new acoustic method of determining set (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 7 (1980), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: An acoustic method has been used to compare the setting behaviours of three chemical and three u.v. activated sealants. The setting rates of the u.v. sealants were found to have similar sub-linear dependences on the applied u.v. intensity. However, considerable differences in the rates of set of these materials were noted when the same u.v. intensities were applied. Adjusting the composition of one of the sealants (Alphaseal) increased the penetration of the u.v. radiation, resulting in a ten-fold improvement in the setting rate. Suitable exposure times and the intensities of radiation necessary to satisfactorily set these u.v. sealants are recommended.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1980.tb00465.x
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  • 4
    Electronic Resource
    Electronic Resource
    Surface treatment studies aimed at streamlining fissure sealant application (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 10 (1983), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Three laboratory studies were carried out with the aim of improving or streamlining enamel surface treatment procedures in fissure sealing.In Study 1, the effect of reducing acid etch time from 60 s to 10 s was assessed by SEM and tensile bond strength measurements. Reduction in etch time produced a finer etch pattern, gave a reduced but still high, bond-strength, albeit with slightly poorer long-term adhesion.Study 2 showed that a conventional acid etch treatment could completely remove acquired pellicle, without prior prophylaxis. SEM studies and bond-strength measurements corroborated this view.In Study 3, compressed air and chemical drying agents were compared for drying speed and efficiency. Compressed air gave more rapid, thorough drying, and greater resultant bond strengths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1983.tb00125.x
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  • 5
    Electronic Resource
    Electronic Resource
    Ultra-violet absorption by two ultra-violet activated sealantss (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 5 (1978), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Since the ability of u.v. setting pit and fissure sealants to set in depth is dependent on the penetration of the u.v. radiation, the absorption coefficients of Nuva-seal and Alphaseal were determined at 365 nm, the wavelength of radiation used to polymerise both materials. Nuva-seal and Alphaseal had absorption coefficients of 0·165 mm −1 and 6·25 mm −1, respectively. The u.v. fluorescent dye present in Alphaseal contributed 2·5 mm −1 to its absorption coefficient and the remaining absorption was due to the 5% w/w catalyst concentration present, since the basic resin had no significant absorption. Therefore Nuva-seal may set adequately to the depths required of fissure sealants, but Alphaseal may not, unless a very high intensity u.v. source is used. A reduction in the catalyst concentration and the removal of the u.v. fluorescent dye might improve the setting characteristics of Alphaseal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1978.tb01237.x
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  • 6
    Electronic Resource
    Electronic Resource
    Microhardness studies on the setting characteristics of fissure sealants (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 5 (1978), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The hardness of five fissure sealants was measured using a Wallace Microhardness Tester and found to continue to increase long after the initial setting. The effect of the intensity of radiation and exposure time on the setting of two u.v. activated sealants (Nuva-seal and Alphaseal) was also investigated, with higher intensities producing both a more rapid set and greater final hardness. Alphaseal required longer exposure at a given intensity of u.v. radiation to achieve the same hardness as Nuva-seal, and displayed relatively slow setting in depth, which could give rise to incomplete polymerization during clinical use, resulting in early sealant loss. Thus special care must be taken to ensure that Alphaseal receives an adequate exposure to u.v. radiation, and sources which are suitable for setting Nuva-seal may not be sufficiently powerful when applying Alphaseal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1978.tb01212.x
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  • 7
    Electronic Resource
    Electronic Resource
    An assessment of new dental ultraviolet sources and u.v.-polymerized fissure sealants (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 10 (1983), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The performance of six dental ultraviolet (u.v.) sources was assessed to establish minimum output requirements and possible u.v. hazards. Exposure criteria for u.v.-cured materials (Nuva-seal P.A., Nuva-cote P.A., Nuva-fil P.A., Lee-seal, u.v.-Dentoseal, Uviobond, Visiobond) were assessed by determining setting time-intensity characteristics, u.v. transmission and microhardness as a function of u.v. intensity and depth. A minimum intensity of 10 mW cm−2 was required for adequate curing and both Nuva-seal P.A. and Nuva-cote P.A. set well in depth with realistic exposures. Total u.v. outputs, average intensities and spatial distributions were assessed for the u.v. sources, most of which were well above minimum requirements. Ultraviolet spectra and maximum permissible exposure measurements indicated that all of the sources were safe in normal use.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1983.tb00115.x
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  • 8
    Electronic Resource
    Electronic Resource
    The effect of salivary contamination on fissure sealant—enamel bond strength (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 8 (1981), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The effect of accidental salivary contamination on the retention of fissure sealants is investigated via in Vitro bond tests and scanning electron microscopy. The strength of the bond between sealant and saliva contaminated and washed enamel (168 ± 14 kg cm−2) is not found to be significantly different from the bond strength to uncontaminated enamel (174 ± 17 kg cm−2). Unwashed contaminated enamel gives significantly reduced bond strength (68 ± 11 kg cm−2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1981.tb00470.x
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  • 9
    Electronic Resource
    Electronic Resource
    High resolution density of states spectroscopy in semiconductors by exact post-transit current analysis (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 1190-1192 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We show that the analysis of post-transit photocurrent i(t) to determine the energy distribution g(E) of trapping states in a semiconductor is capable of much finer energy resolution than has hitherto been realized. Existing methods use a Laplace inversion of i(t) data to find g(E) but employ a delta function approximation for trap release times. In this article we retain the exponential distribution function for the release time and solve the rate equations directly. The analysis is performed on computer generated post-transit data for distributed and discrete traps, and compared with the earlier method and other related transform methods for determining the density of states, g(E). © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.373797
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  • 10
    Electronic Resource
    Electronic Resource
    Bandwidth considerations in modulated and transient photoconductivity measurements to determine localized state distributions (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 278-282 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This work examines the influence of limited instrumental bandwidth on the accuracy of recovery of the density of localized states in semiconductors from transient and modulated photoconductivity data. Paradoxically, knowledge of the short-time transient photoresponse can be vital in the estimation, via a Fourier transform, of the density of deep-lying states. We demonstrate that retention of the natural response of a bandwidth limited system, although subject to distortion at short times, can lead to much improved accuracy in density of states determination than simple truncation of the short-time response. It is shown that this improvement arises simply from the integrating effect of a bandwidth limited system over short time intervals, which makes it possible to access and exploit information originating at times much shorter than the instrumentation rise time. These concepts are exemplified using computer simulated transient photoconductivity for several model systems including one which mimics the expected density of states in amorphous silicon. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.373653
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