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  • 11
    Electronic Resource
    Electronic Resource
    Body growth in urinary tract malformations (1993)
    Springer
    Pediatric nephrology 7 (1993), S. 151-155 
    Details
    ISSN: 1432-198X
    Keywords: Body growth ; Urinary tract malformations ; Hydronephrosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Body height and height velocity were analysed in 54 children with obstructive urinary tract malformations over a mean period of 8.7 years, using new auxological methods. At the time of diagnosis, 9% of patients had a height of more than 2 standard deviations below the normal mean. Mean relative height changed significantly from the first to the last observation, the standard deviation score (SDS) increasing from −0.16 to +0.36 in patients with hydronephrosis compared with normal children (P〈0.05) and from −0.63 to +0.02 SDS in those without hydronephrosis (P〈0.005). The pathogenesis of the described growth disturbance is not clear. Stepwise multiple regression analysis pointed to a possible link between the duration of antibiotic treatment and the recovery of growth capacity, but improved growth could not clearly be attributed to any medical or surgical treatment. The synchronized average growth velocity curve was similar to that of healthy children and showed a normal pubertal spurt. Final height and target height calculated from parents' height differed only slightly from that of the normal population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00864383
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  • 12
    Electronic Resource
    Electronic Resource
    Pre-pubertal growth in the hyperprostaglandin E syndrome (1995)
    Springer
    Pediatric nephrology 9 (1995), S. 723-728 
    Details
    ISSN: 1432-198X
    Keywords: Neonatal Bartter syndrome ; Hyperprostaglandin E syndrome ; Body growth ; Potassium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Pre-pubertal body growth was followed in eight children with the hyperprostaglandin E syndrome (neonatal Bartter syndrome) treated with indomethacin over a period of 5–12 years. When corrected for prematurity, the general growth pattern was normal, with the exception of a child with delayed therapy. From the first observation (usually at birth) to the start of indomethacin, the mean height standard deviation score (SDS) corrected for prematurity changed from −0.2 to −2.8. During the first 2 years of therapy rapid catch-up growth occurred, followed by a slow adaptation of the growth pattern to that of healthy children born at term. At last observation the mean corrected height SDS was −0.5 range −1.9 to +0.9) and the mean target height −0.9 SDS (range −1.8 to +0.1). Weight, body mass index and bone maturation also reached the normal range. No correlation was found between height SDS per year and serum potassium levels or calcium excretion. We conclude that under indomethacin treatment long-term skeletal growth of children with the hyperprostaglandin E syndrome is similar to that of other preterm children.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00868723
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  • 13
    Electronic Resource
    Electronic Resource
    Changes with hypertension and maturation in the response of stomach fundus to acetylcholine (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 691-692 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The purpose of these experiments was to compare the contractile response to ACh of stomach fundal strips from hypertensive (SHR) and normotensive (WKY) rats during the development of hypertension. The results indicate that the reactivity to ACh is the same in fundal strips from young SHR and WKY rats; however, with maturation strips from WKY rats undergo a reduction in responsiveness which does not occur in the SHR. Therefore, strips from older SHR rats are more reactive to ACh than are those from age matched WKY rats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01949725
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  • 14
    Electronic Resource
    Electronic Resource
    Single-electron tunneling in Au55 cluster monolayers (1998)
    Springer
    Applied physics 66 (1998), S. S187 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 87.64.Dz; 61.46.+w; 73.23.Hk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051127
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  • 15
    Electronic Resource
    Electronic Resource
    Cell kinetics of anagen scalp hair bulbs in hirsutism analysed by DNA-flow cytometry (1989)
    Springer
    Archives of dermatological research 281 (1989), S. 507-509 
    Details
    ISSN: 1432-069X
    Keywords: Hirsutism ; Anagen hair ; Cell cycle kinetics ; Flow cytometry ; Testosterone ; Dehydroepiandrosterone sulfate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00510090
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  • 16
    Electronic Resource
    Electronic Resource
    Detection and characterization of single molecules in aqueous solution (1996)
    Springer
    Applied physics 63 (1996), S. 517-523 
    Details
    ISSN: 1432-0649
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using a confocal microscope with a single-photon avalanche photodiode as detector, we studied photon bursts of single Rhodamine 6G (R6G) and Rhodamin B-zwitterion (RB) molecules in aqueous solution by excitation of the lowest excited singlet stateS 1 with a frequency-doubled titanium: sapphire laser. Multichannel scaler traces, the fluorescence autocorrelation function and fluorescence decay times determined by time-correlated single-photon counting have been measured simultaneously. The time-resolved fluorescence signals were analyzed with a maximum likelihood estimator. Fluorescence lifetime patterns in steps of 100 ps were generated by convolution with the excitation pulse. The lifetime of theS 1 state was derived from the Kullback-Leibler minimum discrimination information. We are able to demonstrate for the first time identification of two different single dye molecules via their characteristic fluorescence lifetimes of 1.79 ± 0.33 ns (RB) and 3.79 ± 0.38 ns (R6G) in aqueous solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01828950
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  • 17
    Electronic Resource
    Electronic Resource
    Detection and characterization of single molecules in aqueous solution (1996)
    Springer
    Applied physics 63 (1996), S. 517-523 
    Details
    ISSN: 1432-0649
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract.  Using a confocal microscope with a single-photon avalanche photodiode as detector, we studied photon bursts of single Rhodamine 6G (R6G) and Rhodamin B-zwitterion (RB) molecules in aqueous solution by excitation of the lowest excited singlet state S 1 with a frequency-doubled titanium:sapphire laser. Multichannel scaler traces, the fluorescence autocorrelation function and fluorescence decay times determined by time-correlated single-photon counting have been measured simultaneously. The time-resolved fluorescence signals were analyzed with a maximum likelihood estimator. Fluorescence lifetime patterns in steps of 100 ps were generated by convolution with the excitation pulse. The lifetime of the S 1 state was derived from the Kullback-Leibler minimum discrimination information. We are able to demonstrate for the first time identification of two different single dye molecules via their characteristic fluorescence lifetimes of 1.79±0.33 ns (RB) and 3.79±0.38 ns (R6G) in aqueous solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01828950
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  • 18
    Electronic Resource
    Electronic Resource
    Characterization of human immunodeficiency virus-1 (HIV-1) rev by (time-resolved) fluorescence spectroscopy (1994)
    Springer
    Journal of fluorescence 4 (1994), S. 299-302 
    Details
    ISSN: 1573-4994
    Keywords: Protein fluorescence ; distributional analysis ; AIDS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fluorescence spectroscopy has been applied to the single tryptophan-containing regulatory protein Rev of human immunodeficiency virus (HIV-1). The fluorescence emission was found to have a maximum at 336 nm which refers to a surrounding of the chromophore of intermediate polarity. Fluorescence transients recorded at the maximum of fluorescence were found to decay nonexponentially. A bimodal lifetime distribution is obtained from exponential series analysis (ESM) with centers at 1.7 and 4.5 ns. Two microenvironments for tryptophan are suggested to be responsible for the two lifetime distributions. No innerfilter effect occurred in a Rev solution up to a concentration of 40 μM. A data quality study of ESM analysis as function of collected counts in the peak channel maximum (CIM) showed that, for reliable reconvolution, at least 15,000 CIM are necessary. The widths of the two distributions are shown to be temperature dependent. The broadening of the lifetime distributions when the temperature is raised to 50°C is interpreted as extension of the number of conformational substates which do not interconvert on the fluorescence time scale. The thermal deactivation (temperature quenching) is reflected in a constant decrease in the center of the short-lived lifetime distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01881444
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  • 19
    Electronic Resource
    Electronic Resource
    Molecular resolution of an organic monolayer by dynamic AFM (1998)
    Springer
    The European physical journal 4 (1998), S. 267-268 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 61.16.Ch Scanning probe microscopy: scanning tunneling, atomic force, scanning optical, magnetic force, etc. - 68.55.-a Thin film structure and morphology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We report molecularly resolved dynamic AFM-measurements of a monolayer of perylene-3,4,9,10-tetracarboxylic-3,4,9,10-dianhydride (PTCDA) epitaxially grown on Ag(110). Preparation and experiments were performed under UHV conditions. The frequency-modulation AFM technique was applied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050378
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  • 20
    Electronic Resource
    Electronic Resource
    On the effect of Umklapp processes in one-dimensional conductors (1983)
    Springer
    Journal of low temperature physics 53 (1983), S. 419-423 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using a modified renormalization group (RG) approach, we study the effect of Umklapp processes for arbitrary band filling. In order to confirm the behavior of invariant coupling obtained previously by means of certain approximations, we present the results of a numerical solution of the RG equations. Considering the response functions of a one-dimensional conductor, we show that Umklapp processes are irrelevant for T〈|δμ|, where δμ is the deviation of the Fermi energy from the commensurability level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00682487
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