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  • 1
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    DNA sequence from Cretaceous period bone fragments (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-11-18
    Description: DNA was extracted from 80-million-year-old bone fragments found in strata of the Upper Cretaceous Blackhawk Formation in the roof of an underground coal mine in eastern Utah. This DNA was used as the template in a polymerase chain reaction that amplified and sequenced a portion of the gene encoding mitochondrial cytochrome b. These sequences differ from all other cytochrome b sequences investigated, including those in the GenBank and European Molecular Biology Laboratory databases. DNA isolated from these bone fragments and the resulting gene sequences demonstrate that small fragments of DNA may survive in bone for millions of years.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Woodward, S R -- Weyand, N J -- Bunnell, M -- New York, N.Y. -- Science. 1994 Nov 18;266(5188):1229-32.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Brigham Young University, Provo, UT 84602.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973705" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Bone and Bones/*chemistry ; Consensus Sequence ; Cytochrome b Group/*genetics ; DNA, Mitochondrial/chemistry/*genetics/isolation & purification ; Databases, Factual ; History, Ancient ; Molecular Sequence Data ; *Paleontology ; Polymerase Chain Reaction ; Sequence Analysis, DNA ; Sequence Homology, Nucleic Acid ; Utah
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    PAPER CURRENT
  • 2
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    Rapid Response Flood Water Mapping (2010)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Since the beginning of operation of the MODIS instrument on the NASA Terra satellite at the end of 1999, an exceptionally useful sensor and public data stream have been available for many applications including the rapid and precise characterization of terrestrial surface water changes. One practical application of such capability is the near-real time mapping of river flood inundation. We have developed a surface water mapping methodology based on using only bands 1 (620-672 nm) and 2 (841-890 nm). These are the two bands at 250 m, and the use of only these bands maximizes the resulting map detail. In this regard, most water bodies are strong absorbers of incoming solar radiation at the band 2 wavelength: it could be used alone, via a thresholding procedure, to separate water (dark, low radiance or reflectance pixels) from land (much brighter pixels) (1, 2). Some previous water mapping procedures have in fact used such single band data from this and other sensors that include similar wavelength channels. Adding the second channel of data (band 1), however, allows a band ratio approach which permits sediment-laden water, often relatively light at band 2 wavelengths, to still be discriminated, and, as well, provides some removal of error by reducing the number of cloud shadow pixels that would otherwise be misclassified as water.
    Keywords: Earth Resources and Remote Sensing
    Type: 8th AARSE Conference (Africa Association of Remote Sensing of the Environment; Oct 25, 2010 - Oct 29, 2010; Addis Ababa; Ethiopia
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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