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  • 1
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 1429-1432 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Remote detection of ultrasonic waves is shown experimentally by measuring the infrared (IR) radiation accompanying the adiabatic propagation of surface waves. The Rayleigh waves were excited by a pulsed Nd:yttrium–aluminum–garnet laser on the surface of a steel sample at temperatures up to 700 °C. The observed time-of-flight data of the Rayleigh waves correspond to values obtained by optical interferometry and the measured signal-to-noise ratio of (approximate)0.1 agrees with the estimated value using an IR detector with a sensitivity of D*=1.7×109 mm (square root of)Hz/W. Further improvements of IR detection may lead to a viable tool for laser ultrasonics. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 3470-3473 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The analysis of ultrasonic signals in the frequency domain offers advantages over processing in the time domain. The principal methods are discussed to derive phase velocity and attenuation data from the Fourier spectra of the measured signals. An extension of these methods is pointed out. It yields a higher resolution and accuracy and is particularly useful for thin specimens where separate echoes are difficult to obtain. The method also allows corrections for coupling layers. The underlying theory is easily implemented in a software code for automated signal processing systems. Good agreement of theory and experimental data is obtained. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1469-7610
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Background:  The frequently reported decline in the overall frequency and intensity of fears during late childhood and adolescence may mask different developmental patterns for two broad subclasses of fears: fears concerning physical danger and fears concerning social evaluation. It was investigated if physical fears decrease between late childhood and mid-adolescence, while social-evaluative fears increase during this period. It was also studied if changes in both sets of fears are more strongly related to socio-cognitive maturity than to age, which itself is only a proxy measure of maturity.Methods:  A non-clinical sample of 882 children and adolescents (ages 8–18) was recruited for study. Fears were assessed using the Ollendick Fear Survey Schedule for Children – Revised (FSSC-R). A Principal Components Analysis (PCA) was conducted to study the factor structure of the Failure and Criticism subscale of the FSSC-R. Level of development was assessed using the Sentence Completion Test for Youth (SCT-Y), a measure of socio-cognitive maturity that is based on Loevinger's model, and measure, of ego development.Results:  The PCA of the Failure and Criticism subscale revealed three factors: Social Evaluation, Achievement Evaluation, and Punishment. As predicted, the significant decrease of overall fearfulness obscured two contradictory developmental patterns: (a) fears of physical danger and punishment decreased with age, whereas (b) fears of social and achievement evaluation increased with age. Hierarchical regression analyses showed that the age effect for social-evaluative fears was explained entirely on the basis of developmental differences in socio-cognitive maturity (controlling for verbal ability). In contrast, age was a better predictor of the decrease of physical and punishment fears (although socio-cognitive maturity still added to the predictive value of age).Conclusion:  The expression of social evaluation fears during adolescence appears not atypical and might be a corollary of socio-cognitive maturation. At the same time, the natural presence of those fears during adolescence appears to constitute a vulnerability for developing a social anxiety disorder.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 91 (1987), S. 5093-5098 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of dermatology 27 (1988), S. 0 
    ISSN: 1365-4632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Pterygium inversum unguis is a nail abnormality in which the distal aspect of the nail bed/hyponychium is adherent to the ventral surface of the nail plate, resulting in obliteration of the distal groove. We present a 50-year-old man who developed this abnormality on his right fingers and toes after a stroke that resulted in paresis of his right side. Unusual features of this case include the association with a neurologic disorder, assymetric distribution, involvement of toes as well as fingers, and occurrence in the male gender.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford UK : Blackwell Science Ltd
    Journal of oral rehabilitation 28 (2001), S. 0 
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The aim of this study was to examine an in vitro dental plaque model for volumetric assessment and 3D reconstruction of experimentally bacterial induced caries-like lesions. Twenty-three extracted, impacted human molars were coated with a varnish leaving a 3 × 3 mm window on the smooth surface. The teeth were coated with human saliva and Streptococcus sobrinus 6715 adhered onto the enamel via a succrose dependent mechanism. The coated teeth were incubated for 1, 7, 14 and 28 days. At the end of each incubation period microhardness was measured on three sectioned teeth of each incubation period at the enamel surface and at 450 and 750 μm depth perpendicular to the enamel surface. The enamel surface was investigated by scanning electron microscopy (SEM) prior to embedding and serial sectioning of 12 other teeth. The serial sections were studied with polarization light microscopy to investigate subsurface demineralization. The outlines of the caries-like lesions were then traced consecutively on transparencies, digitized and three-dimensionally reconstructed to demonstrate the expansion of the lesion into enamel for volumetric assessment. Microhardness was significantly reduced on the enamel surface after 7, 14 and 28 days incubation. The SEM investigation showed a surface demineralization with dissolution of the prism cores after 28 days incubation. Polarization light microscopy demonstrated caries-like lesions with an irregular expansion into enamel. The results demonstrate that the described method produces caries-like lesions which can be used for further experimental studies regarding demineralization and remineralization processes.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of industrial microbiology and biotechnology 3 (1988), S. 329-331 
    ISSN: 1476-5535
    Keywords: Neptunium ; Metal uptake ; Microorganism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Resting cells of several species of microorganisms removed neptunium (Np) from an aqueous solution. Concentrations of up to 15 mg Np per g cells (dry weight) were obtained. Maximum uptake byMicrococcus luteus occurred in less than 10 min.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 64 (1986), S. 713-716 
    ISSN: 1432-1440
    Keywords: Bile duct carcinoma ; Malignant bile duct stenosis ; Chemotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The prognosis of bile duct cancer is still poor. Curative surgical therapy is possible in only 10%–20% of cases. Palliative effects of chemotherapy and radiation are small. Newer palliative techniques like iridium 192 wire radiation or hepatic artery infusion of chemotherapeutic agents seem to be more effective. Another new form of palliative local chemotherapy, intrabiliary application of 5-fluorouracil, is described. A 67-year-old woman with an adenocarcinoma of the left and common hepatic ducts received symptomatic therapy by an external biliaray drainage for 20 months. In the following 3 weeks the amount of drained bile diminished and finally stopped, while icterus occurred. Catheter cholangiography showed a right catheter position, the known obstruction of the common hepatic duct and the left bile duct, and a diffuse right-sided peripheral bile duct occlusion, regarded as multifocal tumor spreading. Intraductal application of 5-fluorouracil via the PTCD tube, 125–375 mg twice a week, effected a rising bile secretion after a few days, to a final volume of 1,000 ml/day. An X-ray control 34 days after start of the therapy showed a nearly complete reopening of the formerly occluded peripheral bile duct system and a filiform reopening of the common hepatic duct with sufficient flowing off into the common bile duct and the duodenum. Certain side effects of this therapy were not noticed. After successful reopening of malignant bile tract occlusion, other palliative therapeutic techniques like internal bile drainage or iridium 192 wire radiation can be applied.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 314 (1985), S. 511-515 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We make the case that the cosmic-ray particles that produce cosmic γ-rays in the 100-MeV region can penetrate most of the dense clouds of gas that seem to contain much of the mass of gas in the Galaxy. We determine a probable form for cosmic-ray intensity as a function of Galactic position ...
    Type of Medium: Electronic Resource
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