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  • 1
    Electronic Resource
    Electronic Resource
    Inhibition of IgE formation and allergic inflammation by allergen gene immunization (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 53 (1998), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1998.tb04948.x
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  • 2
    Electronic Resource
    Electronic Resource
    Clinical Study of Tooth Shade Lightening from Dentist-Supervised, Patient-Applied Treatment with Two 10% Carbamide Peroxide Gels (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of esthetic and restorative dentistry 11 (1999), S. 0 
    Details
    ISSN: 1708-8240
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Purpose: Prescribed, patient-applied tooth lightening agents, or nightguard vital bleaching, typically utilizes a 10% carbamide peroxide agent applied during nocturnal hours. The purpose of this randomized double-blind study was to compare the amount of tooth color change in two groups of subjects using dentist-supervised, patient-applied 10% carbamide peroxide gel. Materials and Methods: One group used Opalescence® (Ultradent Products Inc., South Jordan, Utah) and the other Nite White Excel® (Discus Dental, Inc., Los Angeles, California). Evaluation of tooth color for the six maxillary anterior teeth was done using a Vita shade guide at baseline, 1, 2, and 4 weeks. Subjects were instructed to apply the gel nocturnally using a custom-made soft tray 8 hours per day for 2 weeks. The 16 tabs of the shade guide were ranked according to value from darkest to lightest. The number (1–16) that correlated to the shade tab selected as the match for each tooth was the outcome variable. A Kruskal-Wallis one way analysis of variance on ranks was used. Results: The test revealed no statistically significant difference between Opalescence® and NiteWhite® Excel for lightening the teeth (p= .807). The color change was still significant after 2 weeks without further bleaching activity. The baseline evaluation of the maxillary incisors and canines for all subjects, regardless of group, demonstrated a significant shade difference, with the canines being darker. This difference was not seen after 2 weeks of active bleaching or at the 4-week evaluation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1708-8240.1999.tb00415.x
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  • 3
    Electronic Resource
    Electronic Resource
    The Fixed/Detachable Implant Provisional Prosthesis (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of prosthodontics 6 (1997), S. 0 
    Details
    ISSN: 1532-849X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Interim modification and management of a complete denture following surgical uncovering of dental implants can be time-intensive and may fail to provide adequate patient benefit until the definitive prosthesis can be completed. Inadequate interim management can result in functional and tissue difficulties. Modification of the conventional complete denture to a fixed/detachable provisional prosthesis in a one-stage procedure provides the patient an opportunity to experience a fixed prosthesis. The incorporation of fixed, provisional cylinders to the existing denture base using autopolymerizing acrylic resin with a closed-mouth technique is described. The peripheral regions are reduced and the distal extension shortened to resemble a fixed/detachable prosthesis. This conversion technique can provide patient satisfaction and comfort until delivery of the definitive prosthesis. Esthetic concerns, home care problems, or patient difficulties with the provisional prosthesis can be rectified in the final prosthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1532-849X.1997.tb00081.x
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of multiple use of Timedur®-titanium cannon drills: thermal response and scanning electron microscopic findings (2000)
    Copenhagen : Munksgaard International Publishers
    Clinical oral implants research 11 (2000), S. 0 
    Details
    ISSN: 1600-0501
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Multiple use of dental drills is known to raise drilling temperatures. Therefore, to minimize surgical trauma, well sharpened drills are recommended. In order to evaluate surgical trauma due to multiple use, 20 Timedur® cannon drills (ZL-Duraplant-Implant-System®) were used 51 times in an in vitro experimental setting using pigs' mandibles. Preparations of implant sites were performed with cannon drills at a maximum rotational speed of 1200 r.p.m. with low pressure and water irrigation. Drills were divided randomly into 3 groups and were treated differently after each preparation: 10 cannon drills were cleaned only with distilled water (group 1), 5 cannon drills were disinfected with Secudrill® and autoclaved (group 2) and 5 cannon drills were cleaned with Instrument Detergent MIS 027® and autoclaved (group 3). Temperature measurements were performed with a NiCrNi thermocouple placed 0.5 mm from the drilling site. The width of the cutting edge of the cannon drills was repeatedly examined by scanning electron microscope (SEM). Results revealed that temperatures measured at all times were below the bone injuring level. Drills reused more than 40 times stood out with an increased number of higher temperatures. Only autoclaved drills showed an increased width of the cutting edges. From the present investigation it can be concluded that cannon drills of the ZL-Duraplant System® should not be re-used more than 40 times.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-0501.2000.110206.x
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  • 5
    Electronic Resource
    Electronic Resource
    Inhibitory effects of ambient levels of solar UV-A and UV-B radiation on growth of cv. New Red Fire lettuce (1998)
    Copenhagen : Munksgaard International Publishers
    Physiologia plantarum 103 (1998), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The influence of solar UV-A and UV-B radiation at Beltsville, MD, USA, on growth of Lactuca sativa L. (cv. New Red Fire lettuce) was examined during early summer of 1996 and 1997. Plants were grown from seed in plastic window boxes covered with Llumar to exclude UV-A and UV-B, polyester to exclude UV-B, or tefzel (1996) or teflon (1997) to transmit UV-A and UV-B radiation. After 31–34 days, plants grown in the absence of solar UV-B radiation (polyester) had 63 and 57% greater fresh weight and dry weight of tops, respectively, and 57, 72 and 47% greater dry weight of leaves, stems and roots, respectively, as compared to those grown under ambient UV-B (tefzel or teflon). Plants protected from UV-A radiation as well (Llumar) showed an additional 43 and 35% increase, respectively, in fresh and dry weight of tops and a 33 and 33% increase, respectively, in dry weight of leaves and stems, but no difference in root biomass over those grown under polyester. Excluding ambient UV-B (polyester) significantly reduced the UV absorbance of leaf extracts at 270, 300 and 330 nm (presumptive flavonoids) and the concentration of anthocyanins at 550 nm as compared to those of leaf extracts from plants grown under ambient UV-A and UV-B. Additional removal of ambient UV-A (Llumar) reduced the concentration of anthocyanins, but had no further effect on UV absorbance at 270, 300 or 330 nm. These findings provide evidence that UV-B radiation is more important than UV-A radiation for flavonoid induction in this red-pigmented lettuce cultivar. Although previous workers have obtained decreases in lettuce yield under enhanced UV-B, this is the first evidence for inhibitory effects of solar UV-A and UV-B radiation on lettuce growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1399-3054.1998.1030101.x
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  • 6
    Electronic Resource
    Electronic Resource
    Inhibitory effects of ambient levels of solar UV-A and UV-B radiation on growth of cucumber (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 100 (1997), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The influence of solar UV-A and UV-B radiation at Beltsville, Maryland, on growth and flavonoid content in four cultivars of Cucumis sativus L. (Ashley, Poinsett, Marketmore, and Salad Bush cucumber) was examined during the summers of 1994 and 1995. Plants were grown from seed in UV exclusion chambers consisting of UV-transmitting Plexiglas, lined with Llumar to exclude UV-A and UV-B, polyester to exclude UV-B, or cellulose acetate to transmit UV-A and UV-B. Despite previously determined differences in sensitivity to supplemental UV-B radiation, all four cultivars responded similarly to UV-B exclusion treatment. After 19–21 days, the four cultivars grown in the absence of solar UV-B (polyester) had an average of 34, 55, and 40% greater biomass of leaves, stems, and roots, respectively, 27% greater stem height, and 35% greater leaf area than those grown under ambient UV-B (cellulose acetate). Plants protected from UV-A radiation as well (Llumar) showed an additional 14 and 22% average increase, respectively, in biomass of leaves and stems, and a 22 and 19% average increase, respectively, in stem elongation and leaf area over those grown under polyester. These findings demonstrate the extreme sensitivity of cucumber not only to present levels of UV-B but also to UV-A and suggest that even small changes in ozone depletion may have important biological consequences for certain plant species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1997.tb00014.x
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  • 7
    Electronic Resource
    Electronic Resource
    DNA immunization: a novel approach to allergen-specific immunotherapy (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 52 (1997), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1997.tb02415.x
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  • 8
    Electronic Resource
    Electronic Resource
    Dynamics and bifurcations of two coupled neural oscillators with different connection types (1995)
    Springer
    Bulletin of mathematical biology 57 (1995), S. 809-840 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract In this paper we present an oscillatory neural network composed of two coupled neural oscillators of the Wilson-Cowan type. Each of the oscillators describes the dynamics of average activities of excitatory and inhibitory populations of neurons. The network serves as a model for several possible network architectures. We study how the type and the strength of the connections between the oscillators affect the dynamics of the neural network. We investigate, separately from each other, four possible connection types (excitatory→excitatory, excitatory→inhibitory, inhibitory→excitatory, and inhibitory→inhibitory) and compute the corresponding bifurcation diagrams. In case of weak connections (small strength), the connection of populations of different types lead to periodicin-phase oscillations, while the connection of populations of the same type lead to periodicanti-phase oscillations. For intermediate connection strengths, the networks can enter quasiperiodic or chaotic regimes, and can also exhibit multistability. More generally, our analysis highlights the great diversity of the response of neural networks to a change of the connection strength, for different connection architectures. In the discussion, we address in particular the problem of information coding in the brain using quasiperiodic and chaotic oscillations. In modeling low levels of information processing, we propose that feature binding should be sought as a temporally coherent phase-locking of neural activity. This phase-locking is provided by one or more interacting convergent zones and does not require a central “top level” subcortical circuit (e.g. the septo-hippocampal system). We build a two layer model to show that although the application of a complex stimulus usually leads to different convergent zones with high frequency oscillations, it is nevertheless possible to synchronize these oscillations at a lower frequency level using envelope oscillations. This is interpreted as a feature binding of a complex stimulus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02458296
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  • 9
    Electronic Resource
    Electronic Resource
    Imaging Corneal Cells Using Low Power Laser Beams (1998)
    Springer
    Lasers in medical science 13 (1998), S. 148-154 
    Details
    ISSN: 1435-604X
    Keywords: Keywords: Cell dimensions; Corneal endothelium; Corneal epithelium; Laser imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics , Technology
    Notes: Abstract. A simple method of characterising epithelial and endothelial corneal cells using laser light is presented. A continuous wave helium-neon laser emitting at a wavelength of 632.8 nm and a continuous wave argon laser emitting at 488 and 514.5 nm were used. The cell images obtained were used to calculate the dimensions of the endothelial corneal cells, a typical value being 34–36 μm diameter, with overall measurement errors of ±21%. An optical mechanism for obtaining images is proposed and comments are made about the possibility of using this method as a diagnostic tool in corneal disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101030050069
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  • 10
    Electronic Resource
    Electronic Resource
    Oxidation ofn-butane and propene on exhydrotalcite Mg, Al, Fe mixed oxides (1998)
    Springer
    Reaction kinetics and catalysis letters 65 (1998), S. 53-58 
    Details
    ISSN: 1588-2837
    Keywords: Oxidative dehydrogenation ; ODH ; mixed oxides ; LDH
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Oxidative dehydrogenation ofn-butane and propene has been studied on six Mg−Al−Fe oxide catalysts prepared by thermal decomposition of layered double hydroxides with a hydrotalcite-like structure, possessing Mg2+ and Al3+ ions in the brucite-like layers, and hexacyanoferrate in the interlayers. In all cases, CO2 and H2O are formed, together with minor amounts of ethylene and methane. On the solids prepared from hexacyanoferrate(II), formation of benzene is also observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02475315
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