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  • 1
    Electronic Resource
    Electronic Resource
    Nitrate reductase in Zea mays L. under salinity (2000)
    Oxford, UK : Blackwell Science Ltd
    Plant, cell & environment 23 (2000), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Young maize seedlings (Zea mays L. cv.Giza 2) were exposed to moderate salinity in hydroponic culture. NADH-nitrate reductase (NR) activity (E.C. 1·6.6·1), NR activation state, NR-mRNA-steady state levels and major solute contents in leaves and roots were investigated. With increasing external salt concentration, Na+, Cl−, sugars, amino acids and quarternary ammonium compounds accumulated in leaves and roots, with concentrations in leaves exceeding those in roots. The nitrate content of leaves decreased, but increased in roots. The diurnal pattern of NR activity and of NR-mRNA was also changed under salinity, but the NR activation state was not affected. In the first light phase, maximum NR activity increased rapidly in leaves of control plants, but was much slower in leaves from salinized plants. Thus, integrated over the whole day, the NR activity of salt-stressed plants was lower than in control plants. NR transcript levels of control plants were low in the early night phase, started to increase in the second night phase, followed by a distinct peak at 2 h into the light period. This large ‘early morning peak’ of NR-mRNA was hardly affected by salinity, whereas the initial slow increase of m-RNA levels in the early night phase was almost absent in salinized plants. This is considered as one reason for the low NR activity of salinized plants in the first half of the day. It is also suggested that nitrate is a major signal affecting NR expression and activity under salinity. Sugars and amino acids appeared less important.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.2000.00568.x
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  • 2
    Electronic Resource
    Electronic Resource
    Konversionselektronen und Multipolordnungen von Übergängen in Ag110 (1968)
    Springer
    The European physical journal 209 (1968), S. 497-510 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The spectrum of internal conversion electrons emitted by Ag110 after thermal-neutron capture was measured with the beta spectrometer at the research reactor near München. 45 conversion lines corresponding to 34 transitions were found between 0 keV and 300 keV. The multipolarities of 19 transitions were determined. The low-energy gamma radiation was investigated between 10 keV and 600 keV by means of a Ge(Li)-detector. A partial level scheme containing the most intense transitions is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01380555
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  • 3
    Electronic Resource
    Electronic Resource
    Konversionselektronen und Multipolordnungen von Übergängen in Dy165 (1967)
    Springer
    The European physical journal 207 (1967), S. 153-185 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The spectrum of internal conversion electrons emitted by Dy165 after thermal neutron capture was measured with the beta spectrometer at the reactor FRM. 225 conversion lines were found between 0 keV and 7 MeV. They correspond to 193 transitions. The multipolarities of most transitions were determined. The result of this measurement is in good agreement with the level scheme proposed bySchult et al. Eighteen additional levels with energies up to 3 MeV are proposed. A new 3/2−-rotational band with its band head at 1103.30 keV has been disclosed. The level scheme contains 39% of the complete decay of the capture state. The multipolarities of 6 transitions following the beta decay of Dy165 to Ho165 are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326225
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrasound Bone Densitometry of the Os Calcis in Children and Adolescents (2000)
    Springer
    Calcified tissue international 67 (2000), S. 349-355 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Ultrasound bone densitometry — Children — Sex — Weight — Height
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. The aim of the present investigation was to evaluate reference data and to examine whether there were weight-, height-, age-, and sex-related differences of the quantitative ultrasound bone parameters for healthy children and adolescents. A total of 3299 healthy Caucasian children and teenagers (1623 girls and 1676 boys), age range from 6–18 years (mean age 11.4 ± 3.4 years for boys and mean age 11.5 ± 3.3 years for girls) were examined by quantitative ultrasound densitometry (QUS) using the bone sonometer SAHARA (Hologic Inc., Waltham, MA, USA), a waterless, dry system. The parameters broadband ultrasound attenuation (BUA) [dB/MHz] and speed of sound (SOS) [m/second] were evaluated on the right heel in relation to age, sex, weight, and height. There is no correlation between the ultrasound bone parameter SOS and age, height, and weight. BUA increases with age, height, and weight. Significant differences in SOS and BUA between girls and boys were found to probably be caused by the different onset of growth phases and the onset of puberty. SOS and BUA are influenced by changes of bone mineral density. But BUA is dependent on bone size, too. In conclusion, ultrasound bone densitometry is a useful measuring method showing the physiological bone development in childhood and adolescence. The presented results can be used as reference data. Further studies in children with disorders influencing bone metabolism will show in what way various patterns of osteopenia in childhood can be detected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002230001143
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  • 5
    Electronic Resource
    Electronic Resource
    Hochenergetische Konversionselektronen von Cd 114 nach Neutroneneinfang (1967)
    Springer
    The European physical journal 201 (1967), S. 378-393 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Internal conversion electrons of Cd 114 following neutron capture in Cd 113 were measured with a magnetic betaspectrometer in the energy range between 1350 keV and 9100 keV. 132 conversion lines of 115 transitions were found. The multipolarities of most of these transitions were determined. The known level scheme of Cd 114 was extended. An additional level at 1863.3 keV has been disclosed. Spins and parities have been assigned for 19 states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326571
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  • 6
    Electronic Resource
    Electronic Resource
    The influence of epiphytic bacteriae on auxin metabolism (1966)
    Springer
    Planta 68 (1966), S. 327-334 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Pflanzen sind von epiphytischen Bakterien besiedelt, die Tryptophan zu IES umsetzen können. Diese bakterielle Aktivität wird unterbunden durch Chloramphenicol und Streptomycin, aber nicht durch Penicillin. Der Tryptophanumsatz zu IES durch Pflanzenteile oder Enzympräparate ist unter unsterilen Bedingungen weit intensiver als unter sterilen. Das trifft für alle untersuchten Objekte zu: Helianthus annuus, Phaseolus vulgaris, Pisum sativum, Triticum vulgare, Zea mays, Enteromorpha compressa, Fucus vesiculosus, Furcellaria fastigiata. Von Erbsenpflanzen konnten 58 Stämme IES-produzierender Bakterien isoliert und zum Teil identifiziert werden. Während unsterile Pflanzen (Pisum, Zea) beträchtliche IES-Mengen enthalten (Extraktion, Dünnschichtchromatographie, Biotest), kann aus sterilen Pflanzen kaum nachweisbares Auxin extrahiert werden. Aber sterile, mit Mischungen oder einzelnen Stämmen geeigneter Bakterien re-infizierte Pflanzen enthalten wieder beträchtliche Menge extrahierbarer IES.
    Notes: Summary Plants are settled by epiphytic bacteriae able to convert tryptophan to IAA. This bacterial activity is abolished by chloramphenicol and streptomycin but not by penicillin. Tryptophan conversion to IAA by plant parts or enzyme preparations is far more intensive in non-sterile conditions than in sterile ones. This is true for all investigated objects: Helianthus annuus, Phaseolus vulgaris, Pisum sativum, Triticum vulgare, Zea mays, Enteromorpha compressa, Fucus vesiculosus, Furcellaria fastigiata. From pea plants, 58 strains of IAA producing bacteriae were isolated and partly identified. While non-sterile plants (Pisum, Zea) contain considerable amounts of IAA (extraction, thin layer chromatography, biotest), hardly any traceable auxin can be extracted of sterile plants. But sterile plants re-infected with mixtures or single strains of suitable bacteriae again contain considerable amounts of extractable IAA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386332
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  • 7
    Electronic Resource
    Electronic Resource
    Hg 199(n, ce) Hg200 studies (1969)
    Springer
    The European physical journal 218 (1969), S. 95-108 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The conversion-electron spectrum from slow neutron capture in Hg 199 has been measured with the beta spectrometer at the reactor FRM. Approximately 100 conversion-electron lines with energies between 200 and 2300 keV were observed. The multipolarities and mixing ratios of about 50 transitions were determined. Branching and mixing ratios are compared with theoretical predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01392581
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  • 8
    Electronic Resource
    Electronic Resource
    Herstellung hydrierter Produkte aus 1-Acetyl-2, 6-dioxo-2, 3, 4, 6-tetrahydro-pyrido [2, 1-a] isoindol. 2. Mitteilung [1] (1965)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 48 (1965), S. 1927-1932 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1-Acetyl-2,6-dioxo-2,3,4,6-tetrahydro-pyrido[2,1-a]isoindol (II) liefert bei der katalytischen bzw. NaBH4-Reduktion zwei Tetrahydro-stereoisomere VII und X, deren Konfiguration und Konformation mit Hilfe von IR.- und NMR.-Spektren aufgeklärt wurden.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19650480811
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  • 9
    Electronic Resource
    Electronic Resource
    Darstellung substituierter 2, 6-Dioxo-2, 3, 4, 6-tetrahydro-pyrido[2, 1-a] isoindole. 1. Mitteilung (1965)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 48 (1965), S. 1221-1225 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: N-Phtaloyl-β-alanylchlorid und Essigester werden mittels Magnesiumäthylat zu N-Phtaloyl-β-alanyl-acetessigester (IVa) kondensiert, der sich leicht in wasserhaltigem Pyridin zu 1-Acetyl-2,6-dioxo-2,3,6-tetrahydro-pyrido[2,1-a]isoindol (IIa) cyclisieren lässt. Mit dem gleichen Verfahren wird 1-Acetyl-3-phenyl-2,6-dioxo-2,3,4,6-tetrahydro-pyrido[2,1-a]isoindol (IIb) hergestellt. Die Richtigkeit der Struktur IIa wird bewiesen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19650480602
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  • 10
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    Light Scattering by Coherently Driven Lattice Vibrations (1966)
    American Physical Society
    Details
    Publication Date: 1966-04-15
    Print ISSN: 0031-899X
    Electronic ISSN: 1536-6065
    Topics: Physics
    Published by American Physical Society
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