Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1990-1994  (1)
  • 1980-1984  (2)
Source
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Trapped methyl radicals in chert (1982)
    [s.l.] : Nature Publishing Group
    Nature 300 (1982), S. 435-436 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The organic radical signals have been observed in Upper Cretaceous lepispheric cherts from Europe and the Middle East, and in Tertiary chalcedonic cherts from south-west France. The chalcedonic cherts comprise a coarse, fibrous a-quartz (chalcedony) and the lepispheric cherts predominantly comprise ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/300435a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    IBPGR morphological descriptors — their relevance in determining patterns within a diverse spring barley germplasm collection (1992)
    Springer
    Theoretical and applied genetics 85 (1992), S. 489-495 
    Details
    ISSN: 1432-2242
    Keywords: IBPGR ; Morphological descriptors ; Genetic diversity ; Barley
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The International Board for Plant Genetic Resources (IBPGR) promotes a minimum set of morphological characters thought satisfactory for the custodial management of crop germplasm collections. The purpose of such conserved germplasm is as a genetic resource for future plant breeding programmes. Because future plant breeding requirements are not always known, the curator's strategy in maintaining an adequate germplasm resource is to conserve as wide a range of genetic diversity as possible. How is diversity measured to ensure a wide range of conserved germplasm? The IBPGR minimum descriptors detail genetic diversity at particular points in a genome corresponding to the observed characters. The purpose of the present study was to investigate whether diversity as identified by the IBPGR minimum set of descriptors could yield satisfactory measures of diversity in a contrasting set of genomic markers. A diverse spring-sown barley collection of 1379 cultivars was evaluated for the 12 IBPGR minimum taxonomic characters. An additional nine phenotypic characters and six biochemical markers were evaluated to enable diversity comparisons. Cluster analysis of the various sets of data revealed groups of accessions for each of the three data sets. A poor level of agreement (congruence) between data sets was observed in all comparisons indicating that, for cultivated barley at least, diverse collections according to the IBPGR minimum descriptors is not necessarily related to equivalent levels of diversity in other genetic characters. Implications of the relevance of the IBPGR descriptor list and appropriate collection strategies are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222331
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A switched continuous-wave sonic anemometer for measuring surface heat fluxes (1982)
    Springer
    Boundary layer meteorology 23 (1982), S. 425-448 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A one-dimensional sonic anemometer system suitable for use in measuring near surface heat fluxes is described. It operates by transferring continuous sound waves in alternate directions between a matched pair of cheap ultrasonic transducers. The design and development of the anemometer is described, together with wind tunnel tests, and field experiments, in which the performances of several prototypes are compared with those of other anemometers over stubble and over forest. The results indicate that the device is suitable for measuring eddy correlation heat fluxes to an accuracy better than 5%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00116271
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...