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  • 11
    Electronic Resource
    Electronic Resource
    Phytochrome-mediated synthesis of α-Amylase (EC.3.2.1.1.) in mustard seedlings (1971)
    Springer
    Naturwissenschaften 58 (1971), S. 97-98 
    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/BF00595029
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  • 12
    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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  • 13
    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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  • 14
    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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  • 15
    Electronic Resource
    Electronic Resource
    The influence of preculture on the process performance of penicillin V production in a 100-l air-lift tower loop reactor (1992)
    Springer
    Applied microbiology and biotechnology 37 (1992), S. 157-163 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The influence of stirrer speed in the third preculture on the performance of penicillin V production by Penicillium chrysogenum in complex medium in a 100-l air-lift tower loop reactor was investigated. The process performance in the main culture was improved by increasing the stirrer speed from 500 to 750 rpm: the pellet size was reduced to half, the cell growth was influenced only slightly, but the production phase was extended considerably, and the final penicillin concentration was increased from 5.1 g 1-1 to 10.4 g 1-1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00178163
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  • 16
    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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  • 17
    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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  • 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
    Determination of hydroxyproline in meat products by flow injection analysis (1988)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 329 (1988), S. 732-734 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A modification of the German standard method for the determination of hydroxyproline (DIN 10144) is described. By applying a thermostatted reaction coil the relatively slow developing colour reaction between pyrrols and 4-dimethylaminobenzaldehyde could be adapted to FIA-conditions. The presented FIA-method allows for an injection frequency of 80/h and a sample throughput, on routine basis, of about 40/h. The reproducibility of multiple injections in the range 20–200 mg hydroxyproline/l hydrolysate is 1.5% r.s.d. Sulfuric and hydrochloric acid have been used for hydrolysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00624786
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  • 20
    Electronic Resource
    Electronic Resource
    Bestimmung von Fluor in Knochen durch Neutronen- und Photonenaktivierungsanalyse (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 283 (1977), S. 121-127 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Fluor in Knochen ; Aktivierungsanalyse, Neutronen/Aktivierungsanalyse, Photonen ; Methodenvergleich
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Im Rahmen eines Methodenvergleiches wurde der Fluorgehalt identischer Knochenproben durch Neutronen (NAA)- und Photonen (PAA)-Aktivierungsanalyse untersucht. Nach Optimierung der Bestrahlungs- und Me\bedingungen ergibt sich als Nachweisgrenze bei der NAA 3,9 Μg und bei der PAA 0,3 Μg. Diese Nachweisgrenzen sind ausreichend, um in einer Knochenbiopsie der Masse 50 mg den minimal zu erwartenden Fluorgehalt von 200 ppm quantitativ zu bestimmen. Der Analysenfehler betrÄgt in diesem Fall bei der NAA ±15% und bei der PAA ±25%. Der Zeitaufwand für die Analyse einer Einzelprobe betrÄgt 1 min (NAA) bzw. 4 h (PAA). Die Regressionsanalyse ergibt einen Korrelationskoeffizienten von 0,96.
    Notes: Abstract For comparison of the two methods the fluorine content was determined in identical bone samples. After optimization of the irradiation and measuring conditions the detection limit was found to be 3.9 Μg for NAA and 0.3 Μg for PAA. Both detection limits are sufficient for the quantitative determination of the minimum expected value of 200 ppm fluorine in a bone biopsy sample of 50 mg. In this case the analytical error is ±15% for NAA and ±25% for PAA, respectively. The time necessary for the analysis of a single sample is 1 min (NAA) or 4 h (PAA). The regression analysis yields a correlation coefficient of 0.96.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00539076
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