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  • 1
    Electronic Resource
    Electronic Resource
    Über Heterocyclen, 17. Mitt. (1969)
    Springer
    Monatshefte für Chemie 100 (1969), S. 703-707 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Hexahydro-10a-methyl-2H[1]benzopyrano[2,3-d]pyrimidin-2-ones have been synthesized by the reaction of hexahydro-8a-methylpyrimido[4.5-d]pyrimidine-2.7(1H, 3H)-diones with phenols having reactive o-positions.
    Notes: Zusammenfassung Hexahydro-8a-methylpyrimido[4,5-d]pyrimidin-2,7 (1H, 3H)-dione reagieren mit o-reaktiven Phenolen zu Hexahydro-10a-methyl-2H[1]benzopyrano[2,3-d]pyrimidin-2-onen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00904119
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  • 2
    Electronic Resource
    Electronic Resource
    III. Buchbesprechungen (1965)
    Springer
    European journal of forest research 84 (1965), S. 124-128 
    Details
    ISSN: 1612-4677
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01973511
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Entstehungsgeschichte und waldbautechnischen Bedeutung der hessischen Forstordnung für die Grafschaft Hanau-Münzenberg vom Jahre 1736 (1966)
    Springer
    European journal of forest research 85 (1966), S. 305-314 
    Details
    ISSN: 1612-4677
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01822319
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  • 4
    Electronic Resource
    Electronic Resource
    Die Darstellung von reinem γ.γ-Dimethyl-allylpyrophosphat nach dem Verfahren von F. Cramer (1965)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 98 (1965), S. 414-418 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Chromatographie an Silicagel gelingt die Trennung des Reaktionsgemisches, das bei der Umsetzung von γ.γ-Dimethyl-allylalkohol mit Triäthyl-ammoniumphosphat und Trichloracetonitril entsteht. Reines γ.γ-Dimethyl-allylpyrophosphat wird als Cyclohexylammonium- und als Ammoniumsalz isoliert. Nach dem Verfahren wird auch γ.γ-Di-[14C-methy]-allylpyrophosphat gewonnen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19650980212
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  • 5
    Electronic Resource
    Electronic Resource
    Notiz zur Darstellung von γ.γ-Dimethyl-allylpyrophosphat (1966)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 99 (1966), S. 2409-2409 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19660990740
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Biosynthese der Mutterkornalkaloide, III. Synthese und Einbau eines 14C- und 3H-markierten 4-Dimethylallyl-tryptophans und eines 14C-markierten 4-Dimethylallyl-tryptamins sowie Einbau eines 14C-markierten Dimethylallyl-pyrophosphats (1967)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 706 (1967), S. 223-229 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ein in der Allylseitenkette am C-1 mit 14C und in der Alaninseitenkette am α-C-Atom mit Tritium markiertes 4-[γγ-Dimethylallyl]-tryptophanDMA-Tryptophan bzw. DMA-Tryptamin wird ohne Änderung des 3H/14C-Verhältnisses in Agroclavin und Elymoclavin eingebaut. In der Allylseitenkette 14C-markiertes 4-[γγ-Dimethylallyl]-tryptaminDMA-Tryptophan bzw. DMA-Tryptamin, wird durch Decarboxylierung des entsprechenden Tryptophans und durch Synthese dargestellt. Auch das DMA-Tryptamin wird reproduzierbar von den Pilzen zum Aufbau der Clavin-Alkaloide verwendet, ebenso radioaktives γγ-Dimethylallyl-pyrophosphat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19677060123
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  • 7
    Electronic Resource
    Electronic Resource
    Umsetzungen mit Kryolith. I. Umsetzung von Tetrachlorkohlenstoff mit Kryolith (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 34 (1966), S. 243-250 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aliphatische Fluorverbindungen lassen sich durch Ersatz von Chlor in Chloralkanen durch Fluor aus einfachen anorganischen Fluoriden nur schwer gewinnen. Dies gilt sowohl für Alkalifluoride als auch für Flußspat. Der Ersatz dieser Fluoride durch Kryolith, in dem das Fluor komplex gebunden ist, versprach Vorteile.Dampfförmiger Tetrachlorkohlenstoff reagierte ab 375°C mit Kryolith in Form von Pellets oder Mischungen aus Kryolith und Quarzsand unter Bildung von CFCl3 (F 11) und wenig CF2Cl2 (F 12) und CF3Cl (F 13). Durch Verringerung der Größe der Pellets konnte die Ausbeute gesteigert werden, höhere Brenntemperaturen setzten sie herab. Aus den Werten der Fluor- und Chloranalysen der abreagierten Festschicht konnten Hinweise auf die Zusammensetzung des festen Reaktionsproduktes gewonnen werden, gleichzeitig bestätigten sie die Befunde über die genannten gasförmigen Reaktionsprodukte.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660340503
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  • 8
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    An empirical model of the drift velocity of equatorial plasma depletions (2012)
    Wiley
    Details
    Publication Date: 2012-12-12
    Description: The Far-Ultraviolet Imager on the IMAGE spacecraft (IMAGE-FUV) has been used to observe O+ plasma depletions in the post-sunset equatorial ionosphere. Small-scale density irregularities associated with such depletions are believed to adversely affect trans-ionospheric radio signals such as GPS. Prediction of the motion of these plasma depletions is a necessary component of the ability to forecast the occurrence of such radio signal interference. An automated method has recently been developed to identify and track the position and zonal drift velocity of these depletions. Here we use this method to create a large database of the zonal drift velocities of these depletions. We present an empirical model based on these observations that describes the observed drift velocities as a function of both local time and magnetic latitude, which is essential to represent their behavior. A comparison of the observed drift velocities with zonal winds from both an empirical model (Horizontal Wind Model; HWM07) and a first-principles model (the TIEGCM) reveals that the plasma depletions' drift velocities have a latitudinal gradient that cannot be explained solely by the F-region dynamo in the post-sunset period, at least by these climatological models. This suggests that these plasma depletions may not simply drift with the background F-region plasma. It has previously been suggested that vertical polarization electric fields associated with the plasma depletions are responsible for their zonal drifts exceeding the background flow, which may explain the previously-observed discrepancy in the drift velocities and the discrepancy in their gradients reported here.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 9
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    On the signature of the quasi-3-day wave in the thermosphere during the January 2010 URSI World Day Campaign (2012)
    Wiley
    Details
    Publication Date: 2012-06-05
    Description: Ultra-fast Kelvin waves with periods of 3–5 days are important in the coupling of the lower atmosphere to the thermosphere and ionosphere. Here we focus on the observations and effects of a 3-day wave during January 2010. As this time period coincides with a stratospheric warming event, a coordinated set of observations with incoherent scatter radars are available. While there is no evidence that the occurrence of this 3-day wave is connected with this event, these observations offer an unprecedented glimpse of the thermospheric conditions during this period, including the first-ever detection of a 3-day wave with an incoherent scatter radar. Using a combination of ground- and space-based observations, we identify an eastward moving zonal wave number-one 3-day equatorial wave that is comprised of a Kelvin wave at the lowest latitudes and a Rossby-gravity wave at higher latitudes. In the equatorial region, the vertical wavelength is ∼40 km and the wave peaks in amplitude around 95–100 km altitude. The wave observed here is only seen to propagate to around 105 km altitude. Evidence of an interaction between this wave and the diurnal tide is seen between 82–88 km. The resultant 3-day periodicity in the diurnal tide is seen to propagate up to altitudes of ∼150 km. This could have a significant impact on the ionosphere via modulation of the E-region dynamo, thus carrying the 3-day periodicity to higher altitudes.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 10
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    Signatures of the 3-day wave in the low-latitude and midlatitude ionosphere during the January 2010 URSI World Day campaign (2012)
    Wiley
    Details
    Publication Date: 2012-06-06
    Description: Recent studies of the equatorial ionosphere have found evidence of forcing by atmospheric Ultra Fast Kelvin (UFK) waves. This study investigates the quasi-3-day UFK wave and its effects on the variations of the ionosphere at low latitudes and midlatitudes using coordinated observations of both the atmosphere and ionosphere during the January 2010 URSI World Day campaign. The global maps of TEC from the IGS ground-based GPS product demonstrate a 3-day periodic variation during January 15–25. This variation has the largest amplitude at 15° magnetic latitude and extends into lower latitudes. Simultaneously, a 3-day wave is observed in the mesosphere in the zonal wind measurements by a meteor radar at the magnetic equator. The latitudinal range of the TEC variation (20°S–20°N) is also consistent with that of the 3-day wave. The Incoherent Scatter Radar (ISR) observations show a 3-day signature in vertical ion drifts over Jicamarca (11.9°S, 76°W) and in the electron densities in the top side of ionosphere measured from Millstone Hill (42.6°N, 71.5°W). This signature is consistent with the fountain effect in the equatorial region, and shows the impact on the topside ionosphere at midlatitudes. The UFK wave is trapped within ±30° geographic latitude, but this study shows that the effects of the wave could reach the ionosphere at the higher latitude even as high as 40°N (50°N magnetic latitude).
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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