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  • 11
    Electronic Resource
    Electronic Resource
    Induction of amylase in mustard seedlings by phytochrome (1971)
    Springer
    Planta 99 (1971), S. 265-274 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In the cotyledons of mustard seedlings (Sinapis alba L.) amylase activity can be induced by phytochrome. In the dark amylase activity remains low. Gibberellic acid (GA3) does not stimulate an increase of amylase activity in this system. Inhibitors of RNA and protein synthesis strongly inhibit the increase of amylase activity mediated by phytochrome. In gel electrophoresis amylase from mustard seedlings reveals 3 bands. The electrophoretic pattern is the same for extracts from dark-grown and from irradiated seedlings. When mustard amylases were incubated with starch the pattern of products was similar to that produced by commercially available barley β-amylase and not similar to that produced by Bacillus subtilis α-amylase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386843
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  • 12
    Electronic Resource
    Electronic Resource
    Peripheral auditory tuning for fine frequency analysis by the CF-FM bat,Rhinolophus ferrumequinum (1976)
    Springer
    Journal of comparative physiology 106 (1976), S. 111-125 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary For echolocation,Rhinolophus ferrumequinum emits orientation sounds, each of which consists of a long constant-frequency (CF) component and short frequency-modulated (FM) components. The CF component is about 83 kHz and is used for Doppler-shift compensation. In this bat, single auditory nerve fibers and cochlear nuclear neurons tuned at about 83 kHz show low threshold and very sharp filter characteristics. The slopes of their tuning curves ranged between 1,000 and 3,500 dB/octave and their Q-10 dB values were between 20 and 400, 140 on the average (Figs. 3–5). The peripheral auditory system is apparently specialized for the reception and fine frequency analysis of the CF component in orientation sounds and Doppler-shift compensated echoes. This specialization is not due to suppression or inhibition comparable to lateral inhibition, but due to the mechanical specialization of the cochlea. Peripheral auditory neurons with the best frequency between 77 and 87 kHz showed not only on-responses, but also off-responses to tonal stimuli (Figs. 1, 2, and 6). The off-responses with a latency comparable to that of N1-off were not due to a rebound from either suppression or inhibition, but probably due to a mechanical transient occurring in the cochlea at the cessation of a tone burst.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00606576
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  • 13
    Electronic Resource
    Electronic Resource
    Originalkopien von Pflanzenteilen (1913)
    Springer
    Naturwissenschaften 1 (1913), S. 1238-1238 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01494580
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  • 14
    Electronic Resource
    Electronic Resource
    Ueber Mogdad-Kaffee (1882)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 21 (1882), S. 438-438 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01356515
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  • 15
    Electronic Resource
    Electronic Resource
    CO adsorbiert auf Rh(001), beobachtet in PES, ISS und Sekundärelektronenspektren (1984)
    Springer
    The European physical journal 55 (1984), S. 27-32 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Abstract The adsorbate system carbonmonoxide-Rhodium (001) was studied by photoemission (PES) and ion scattering spectroscopy (ISS). In common with other CO adsorption systems, CO adsorption causes a decrease in the intensity of the metal-d-band emission and an increase in the neighbourhood of the CO-1π and 5σ state energies. The energy-and angular-distributions of the scattered ions are well described by the binary collision approximation. The ion induced electron emission shows a qualitative dependence on ion species (He+ or Ne+). The difference is attributed to Auger electrons from the Auger neutralisation of the projectile being energetically above or below the vacuum level for He+ and Ne+ projectiles respectively.
    Notes: Zusammenfassung Mit Methoden der Photoemission (PES) und der Ionenstreuung (ISS) wurde das System Kohlenmonoxid, molekular adsorbiert auf Rhodium (001), untersucht. In Übereinstimmung mit anderen CO-Adsorbatsystemen wird eine Abnahme derd-Band-Emission und erhöhte Emission im Bereich der 1π und 5σ CO-Elektronen gefunden. Die Winkelabhängigkeit der gestreuten Ionen stimmt mit dem elastischen Zweierstoßmodell überein. Die ioneninduzierten Sekundärelektronen zeigen einen qualitativen Unterschied, abhängig von der Ionenart, Helium und Neon. Die Ionisierungsenergie des He reicht offensichtlich aus, um durch Auger-Neutralisation Elektronen aus dem 1π/5σ-Bereich auszulösen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01307497
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  • 16
    Electronic Resource
    Electronic Resource
    Unemployment and deterioration of human capital (1990)
    Springer
    Empirical economics 15 (1990), S. 199-215 
    Details
    ISSN: 1435-8921
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract The paper deals with the deterioration of human capital during spells of unemployment. In our model the probability of leaving the unemployment pool decreases with the duration of unemployment. It can be shown that with a linear deterioration function and a simple distribution function for the reservation productivity of firms, unemployment duration is suitably described by a distribution of the Gompertz-Makeham type. In a numerical simulation it could be demonstrated that deterioration of human capital during unemployment affects the relation between vacancies and unemployment in a specific way: in the case of labour market slackness the steady-state Beveridge curve bends away markedly from the standard u-v-curve in an outward direction while in a situation of almost full employment the effects are negligible. For higher deterioration parameters the Beveridge curve may even be upward sloping in a situation of excess supply on the labour market, implying the existence of multiple equilibria. Empirical estimation of the distribution function with German labour market data 1984–1987 reveals that the multiple equilibrium case is likely to be relevant in reality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01973453
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  • 17
    Electronic Resource
    Electronic Resource
    In der elektrochemischen Literatur (1905)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 44 (1905), S. 109-109 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01357291
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  • 18
    Electronic Resource
    Electronic Resource
    Literatur (1928)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 74 (1928), S. 419-421 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01377719
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  • 19
    Electronic Resource
    Electronic Resource
    Ueber gefärbte Gläser zur Aufbewahrung lichtempfindlicher Chemikalien (1901)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 40 (1901), S. 114-114 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01303868
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  • 20
    Electronic Resource
    Electronic Resource
    Application of flow injection techniques for the analysis of inorganic anions (1985)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 320 (1985), S. 451-456 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary A survey of applications of flow injection analysis for the analysis of inorganic anions is given in form of a table. The turbidimetric determination of sulphate is improved by the intermittent addition of a wash solution via a separate pump. A comparison of results for the determination of sulphate in surface waters using the barium-methylthymol blue method and ion-chromatography shows good agreement. For the determination of sulphite a gas-diffusion technique is used. The method allows 90 injections/h and shows good reproducibility, 1% r.s.d. for consecutive injections of standards at the 10 mg/l SO2-level. As the sample line is physically separated from the detection line, the method is insensitive to matrix effects from coloured or turbid samples. Results for the determination of free and total sulphite in wine, beer and fruit juices are given.
    Notes: Zusammenfassung In tabellarischer Form wird ein Überblick über die Anwendung der Fließ-Injektionsanalyse in der anorganischen Anionenanalyse gegeben. Die Zusammenstellung enthält neben Literaturhinweisen einen kurzen Kommentar zur verwendeten Methode. Für die turbidimetrische Sulfatbestimmung wird ein Verfahren mit intermittierendem Zusatz einer Waschlösung über eine separate Pumpe vorgeschlagen. Ein Vergleich von Ergebnissen der Sulfatbestimmung mit Barium-Methylthymolblau als Reagens in Oberflächengewässern mit Ergebnissen der Ionen-Chromatographie zeigt gute Übereinstimmung. Zur Bestimmung des Sulfits wird ein Verfahren mit Hilfe der Gasdiffusion vorgestellt. Die Reproduzierbarkeit von Mehrfachinjektionen liegt, bei einer Probenfrequenz von 90 Injektionen/h, bei 1%. Das Verfahren zeichnet sich durch Unempfindlichkeit gegenüber Probeneigenfärbungen und -trübungen aus. Ergebnissen für die Bestimmung von gesamtem und freiem Sulfit in Wein, Bier und Fruchtsäften werden gegeben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00479811
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