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  • Organic Chemistry  (4)
  • Earth Resources and Remote Sensing  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Über die Bildung von 5-Formylbrenzschleimsäure aus D-Galakturonsäure (1956)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 39 (1956), S. 2126-2130 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 5-Carboxy-2-furfural is formed in a few minutes by the action of cone. sulfuric acid on D-galacturonic acid. This substance seems to be mainly responsible for Dische's colour reaction of hexuronic acids with sulfuric acid and carbazole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19560390725
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Anionenwirkung auf Ca—Na-Gleichgewichte an Kationenaustauschern. 9. Mitteilung über Ionenaustauscher (1957)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 40 (1957), S. 2009-2014 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ca2+—Na+ exchange equilibria between Dowex 50 or cross-linked pectic acid as cation exchangers and external solutions with different anions have been measured. The Ca2+selectivity of the exchangers is decreased by the anions in the following order: acetate, β-indolyl acetate, citrate. Under not to acidic conditions ethylenediamine tetraacetate removes more Ca2+ from the exchanger than the other anions. S-shaped equilibrium curves are obtained with ethylenediamine tetraacetate, showing the bifunctionality of this anion towards Ca2+.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19570400702
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Polyampholyte mit verschiedener Ladungsverteilung (1955)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 38 (1955), S. 1757-1763 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Partial alkaline hydrolysis of polygalacturonic acid methyl ester gives products in which the COOH- and COOCH3-groups are distributed alternatively along the chain molecule. Partial enzymatic hydrolysis, on the other hand, gives products in which the COOH- and COOCH3-groups, respectively, are grouped together in blocks.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19550380711
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  • 4
    Electronic Resource
    Electronic Resource
    Über die saure Decarboxylierung von Hexuronsäuren (1958)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 41 (1958), S. 1722-1730 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The acidic decarboxylation of hexuronic acids and some of their derivatives was studied.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19580410627
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  • 5
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    Retrieval of Aerosol Vertical Profiles Using the Oxygen A-Band (2016)
    In:  Other Sources
    Details
    Publication Date: 2020-01-07
    Description: No abstract available
    Keywords: Earth Resources and Remote Sensing
    Type: JPL-CL-16-2915 , Workshop on Remote sensing in the O2 A-band; Jul 08, 2016; De Bilt; Netherlands
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    An Improved Automatic Classification of a Landsat/TM Image from Kansas (FIFE) (1994)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: This research note shows the results of applying a new massively parallel version of the automatic classification program (AutoClass IV) to a particular Landsat/TM image. The previous results for this image were produced using a "subsampling" technique because of the image size. The new massively parallel version of AutoClass allows the complete image to be classified without "subsampling", thus yielding improved results. The area in question is the FIFE study area in Kansas, and the classes AutoClass found show many interesting subtle variations in types of ground cover. Displays of the spatial distributions of these classes make up the bulk of this report. While the spatial distribution of some of these classes make their interpretation easy, most of the classes require detailed knowledge of the area for their full interpretation. We hope that some who receive this document can help us in understanding these classes. One of the motivations of this exercise was to test the new version of AutoClass (IV) that allows for correlation among the variables within a class. The scatter plots associated with the classes show that this correlation information is important in separating the classes. The fact that the spatial distribution of each of these classes is far from uniform, even though AutoClass was not given information about positions of pixels, shows that the classes are due to real differences in the image.
    Keywords: Earth Resources and Remote Sensing
    Type: FIA-94-01
    Format: text
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    NASA TECHNICAL REPORTS
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