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  • 1
    Monograph available for loan
    Monograph available for loan
    Garmisch-Partenkirchen : Inst. f. Athmosphärische Umweltforschung d. Fraunhofer Ges. ; 1.1969/70(1970) - 8.1976/77(1980)
    Call number: MOP 40082
    Type of Medium: Monograph available for loan
    ISSN: 0171-4082
    Subsequent Title: Forts. ---〉 Balance of the tropospheric ozone and its relation to stratospheric intrusions indicated by cosmogenic radionuclides
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    ISSN: 1432-1254
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Conclusions There is no doubt that positive and negative ion concentrations are influenced by meteorological conditions. But this dependence on weather is due to the given atmospheric content and size of aerosol particles which the small ions attach to (Lassen and Rau, 1960). Consequently, minimum values are found in fog and low visibility, respectively, high values at high visibility, fair weather without precipitation, but also during foehn conditions. However, the latter are in no way distinguished by special features compared to other weather conditions that favor the increase of ion concentrations. This relates to ion concentrations of both signs as well as the ratio from positive to negative concentrations. On the basis of an extensive data material it was possible to confirm again what has been observed long time ago (Reiter, 1960). Weather-dependent effects of foehn ⦓ften claimed but never convincingly proved —can no longer be explained by abnormal ion conditions. This conception should once and for all be put to the realm of stories. Advertisements from the commercial side according to which strong excess and high concentrations of negative ions will generate a “well-being” like that in high mountains or other open countrysides are completely unfounded. It even needs to be pointed out that in a mountainous region during fair weather the ratio of the small ion concentration is shifted more towards positive ions. Similarly, this is true of conditions in roof-gardens and even balconies of multi-storey buildings.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2242
    Keywords: Zea mays ; Restriction fragment length polymorphisms (RFLPs)-Phosphorus (P) stress-quantitative trait loci (QTLs)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary An understanding of the genetic nature underlying tolerance to low-phosphorus (low-P) stress could aid in the efficient development of tolerant plant strains. The objective of this study was to identify the number of loci in a maize (Zea mays L.) population segregating for tolerance to low-P stress, their approximate location, and the magnitude of their effect. Seventy-seven restriction fragment length polymorphisms (RFLPs) were identified and scored in a maize F2 population derived from a cross between line NY821 and line H99. The F2 individuals were self-pollinated to produce F3 families. Ninety F3 families were grown in a sand-alumina system, which simulated diffusion-limited, low-P soil conditions. The F3 families were evaluated for vegetative growth in a controlled-environment experiment. To identify quantitative trait loci (QTLs) underlying tolerance to low-P stress, the mean phenotypic performances of the F3 families were contrasted based on genotypic classification at each of 77 RFLP marker loci. Six RFLP marker loci were significantly associated with performance under low-P stress (P〈0.01). One marker locus accounted for 25% of the total phenotypic variation. Additive gene action was predominant for all of the QTLs identified. Significant marker loci were located on four separate chromosomes representing five unlinked genomic regions. Two marker loci were associated with an additive by additive epistatic interaction. A multiple regression model including three marker loci and the significant epistatic interaction accounted for 46% of the total phenotypic variation. Heterozygosity per se was not predictive of phenotypic performance.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1420-9136
    Keywords: Atmospheric ozone ; Filter instrument intercomparison
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A commercial version of the prototype New Zealand narrowband interference filter instrument has been run at Garmisch-Partenkirchen since autumn 1977. The vicinity of the Dobson stations Hohenpeissenberg and Arosa permitted a check of the filter instrument's utility, reliability and long-term stability in total ozone measurement by (i) station to station-or ‘short-range’ intercomparisons of daily means and (ii) a several days' direct intercomparison at Arosa in spring 1978. The regression analysis with the Hohenpeissenberg data-covering the five month autumn-winter 1977/78 period with highly variable ozone-shows that the filter instrument's direct-sun modeX AD total ozone values were systematically too low by a conversion factor of 0.93. The excellent proportionality between the instruments is indicated by the standard deviation of only 1,3%. The (−7.0±1.3%) bias perfectly agrees with the result reported byBasher [1] for a similar, yet direct, intercomparison. During the direct Arosa intercomparison the filter instrument also tracked down short-time variations in a remarkable, though biased, parallelism with the Dobson instruments, and theX AD daily means fit well into the ‘prognostic’ relationship derived from the preceding autumn-winter ‘short-range’ intercomparison. A creeping deterioration of the characteristics of the 305.5 nm ‘double filter’ then prevented any furtherX AD total ozone intercomparison. No final decision is possible whether this behaviour after a half year's run is typical or just an unusual exception. The otherwise excellent long-term stability is demonstrated by the comparison of theX CD daily means with the HohenpeissenbergX AD data for a 1 1/2 year's period (autumn 1977–spring 1979), resulting in the same bias relationship as for theX AD total ozone measurements.
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  • 5
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Summary The vertical-mass-exchange coefficient was determined from aerosol measurements by two independent methods; the measurements were kept up for a considerable period of time. Thus, well-substantiated relationships between the exchange coefficient on the one hand and meteorological parameters — especially the lapse rate — on the other were found to exist in the lower troposphere between 700 and 1800 m. The first of the two methods is based on measurements of RaB concentration in air at 700, 1800 and 3000 m, the second on recordings of soundings of overall air conductivity between 700 and 1800 m a.s.l. In the first case, mean exchange coefficients were computed from RaB concentration gradients given as averages from RaB measurements at the above-specified levels; in the second, the air conductivity data were used to compute particle concentration profiles, from which incremental exchange coefficients can be computed for thin-layer increments. The latter may be made as thin as is consistent with the vertical resolution of the soundings. The major results obtained were the following: a) The mean exchange coefficient for the 700–1800 and the 1800–3000 m layer is found to be a function of the average temperature lapse rate in the respective layer; this relationship is subject only to some slight statistic alscatter, and is affected in some measure by air-mass changes, wind shear and heat of condensation. b) The mean exchange coefficient is a function of the stability energy of the layer concerned, subject to the influences listed in a). c) The exchange coefficient of an inversion layer is a function of the greatest inverse lapse rate existing in any part of the inversion. d) Vertical mass exchange in or through a layer of any thickness is primarily determined by the lowest incremental mass-exchange coefficient of any thinner layer contained therein. — The study is supplemented by results of fine-structure analyses of discontinuity layers and their surroundings.
    Notes: Zusammenfassung Zwei unabhängige Verfahren zur direkten Bestimmung des vertikalen Austauschkoeffizienten auf dem Wege über Aerosolmessungen werden über lange Zeiträume hinweg angewandt um gesicherte Beziehungen zwischen Austauschkoeffizient und meteorologischen Zustandsgrössen, vorallem des vertikalen Temperaturgrdienten, in der unteren Troposphäre zwischen 700 und 3000 m NN abzuleiten. Das eine Verfahren beruht auf der Messung der RaB-Konzentration in der Luft in 700, 1800 und 3000 m NN, das andere in der aerologischen Registrierung der totalen Luftleitfähigkeit zwischen 700 und 1800 m. Im ersten Falle können aus den mittleren Konzentrations gradienten die mittleren Austauschkoeffizienten direkt berechnet werden, im zweiten werden die Luftleitfähigkeitswerte zunächst in Partikelkonzentrationen umgerechnet. Diese gestatten die Be rechnung von differentiellen Austauschkoeffizienten über beliebig kleine Höhenintervalle. Die wichtigsten Ergebnisse sind: a) Der mittlere Austauschkoeffizient zwischen 700–800 und 1800–300 m lässt sich bei geringer statischer Streuung als Funktion des mittleren Temperaturgradienten in der jeweiligen Schicht angeben. Nebeneinflüsse: Luftkörperwechsel, Kondensationswärme, Windscherung. b) Der mittlere Austauschkoeffizient lässt sich als Funktion der Stabilitäenergie in der betrachteten Schicht darstellen, Nebeneinflüsse wie bei a). c) Der Austauschkoeffizient durch eine Inversionsschicht hindruch ist eine Funktion des grössten positiven Temperaturgradienten in der Inversion. d) Der vertikale Austausch durch eine beliebig dicke Schicht hindurch wird im wesentlichen durch den kleinsten differentiellen Austauschkoeffizienten innerhald dieser Schicht bestimmt. — Schliesslich werden Ergebnisse über Feinstrukturuntersuchungen im Bereich von Unstetigkeitsschichten mitgeteilt.
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  • 6
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Both the superficial and deep pineal components of the intact hamster contain a rich network of green to yellow-green fluorescent nerve fibres. After either superior cervical ganglionectomy or after transection of the nervi conarii the majority of the fluorescing fibres disappeared from both the superficial and deep pineal mases. Although the deep pineal remained intact after surgical removal of the superficial pineal, it was devoid of any green or yellowgreen fluorescent fibres.
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  • 7
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Previous studies show that the suppression of gonadal function in blind-anosmic rats is dependent on the pineal gland. The present results demonstrate that in young female rats both the pineal gland and dual sensory deprivation have additional independent antigonaldal effects.
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  • 8
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Acute bilateral superior cervical ganglionectomy (SCGX) completely prevents the nocturnal rises in pineal N-acetyltransferase (NAT) activity and melatonin content in male rats kept in light-dark cycles of 14∶10. Unilateral SCGX causes the NAT and melatonin levels to be intermediate between those in sham-operated control rats and those in rats from which both ganglia had been removed.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 36 (1980), S. 664-665 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Bovine pineal serotonin (5-HT) was analyzed at the time of the solstices and equinoxes from December, 1975 until June, 1978. The highest values of 5-HT were detected at the winter solstices and lowest values at the summer solstices of each year examined. The peaks in bovine pineal 5-HT correspond with a lessened fertility in cattle reported during the winter months.
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  • 10
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Pinealectomized and intact adult female white-footed mice were maintained outdoors from 28 November to 2 January. At the termination of the experiment, ovarian weight was significantly greater (p〈0.02) in the pinealectomized group compared with that of the intact animals. Microscopic examination of the ovaries revealed that those of the intact animals had fewer and smaller follicles than those from animals which had had their pineal glands removed.
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