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  • Enologus oxypygum  (2)
  • OCEANOGRAPHY  (2)
  • Acanthopetalum sicanum  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    18S-28S rDNA is interspersed throughout heterochromatin in the millepede Enologus oxypygum (Diplopoda) (2000)
    Springer
    Genetica 110 (2000), S. 151-155 
    Details
    ISSN: 1573-6857
    Keywords: chromosomes ; diplopoda ; Enologus oxypygum ; FISH ; heterochromatin ; invertebrate ; rDNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In the present study, somatic metaphase chromosomes of the millipede Enologus oxypygum (Diplopoda: Julida) were hybridized in situ with a sea urchin (Echinodermata) ribosomal probe (prRl4) in order to map major RNA genes (rDNA). Chromosomal preparations were also silver stained (Ag-NOR) to evaluate the rDNA transcriptional activity. Our results indicate that RNA genes are throughout heterochromatin in eight chromosomes involving 1/4 of the total heterochromatin which, in this species, is about 67% of the total DNA. Ag-NOR and FISH patterns were not coincident.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017928826304
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    High heterochromatin content in somatic chromosomes of two unrelated species of Diplopoda (Myriapoda) (1997)
    Springer
    Chromosome research 5 (1997), S. 407-412 
    Details
    ISSN: 1573-6849
    Keywords: Acanthopetalum sicanum ; chromosome banding ; Diplopoda ; Enologus oxypygum ; heterochromatin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract For the first time, a conventional analysis of C-banded karyotypes was carried out in two distantly related diplopod species; this revealed an impressive percentage of heterochromatin in both genomes. In Acanthopetalum sicanum (Order Callipodida) (2n = 12), heterochromatin constitutes about 60% of the total DNA in females and 56% in males, whereas in Enologus oxypygum (Order Julida) (2n = 22) it is about 67% in both sexes. Heterochromatin of the two species was found to be similar in base composition (AT rich) and heterochromatin distribution, indicating that it has accumulated in a species-specific manner. Sex-determining mechanisms of the XY type were detected in both A. sicanum and E. oxypygum. In A. sicanum, the Y presented the lowest heterochromatic content of all chromosomes in the karyotype, whereas the X presented the highest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018400510064
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    Paper (German National Licenses)
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  • 3
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    Methodology for interpretation of SST retrievals using the AVHRR split window algorithm (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Intercomparisons of sea surface temperature (SST) products derived from the operational NOAA-7 AVHRR-II algorithm and in situ observations are made. The 1982 data sets consist of ship survey data during the winter from the Mid-Atlantic Bight (MAB), ship and buoy measurements during April and September in the Gulf of Mexico and shipboard observations during April off the N.W. Spanish coast. The analyses included single pixel comparisons and the warmest pixel technique for 2 x 2 pixel and 10 x 10 pixel areas. The reason for using multi-pixel areas was for avoiding cloud contaminated pixels in the vicinity of the field measurements. Care must be taken when applying the warmest pixel technique near oceanic fronts. The Gulf of Mexico results clearly indicate a persistent degradation in algorithm accuracy due to El Chichon aerosols. The MAB and Spanish data sets indicate that very accurate estimates can be achieved if care is taken to avoid clouds and oceanic fronts.
    Keywords: OCEANOGRAPHY
    Type: NASA-TM-85100 , NAS 1.15:85100
    Format: application/pdf
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  • 4
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    Oceanographic applications of the Kalman filter (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Kalman filter is a data-processing algorithm with a distinguished history in systems theory. Its application to oceanographic problems is in the embryo stage. The behavior of the filter is demonstrated in the context of an internal equatorial Rossby wave propagation problem.
    Keywords: OCEANOGRAPHY
    Type: NASA-TM-83993 , NAS 1.15:83993
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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