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  • Phylogeny  (2)
  • Astronomy--Periodicals.  (1)
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Language
Years
  • 1
    Online Resource
    Online Resource
    Yearbook of Astronomy 2021. (2020)
    Havertown :Pen & Sword Books Limited,
    Details
    Keywords: Astronomy--Periodicals. ; Astronomy. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (454 pages)
    Edition: 1st ed.
    ISBN: 9781526771889
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=6840319
    DDC: 520.5
    Language: English
    Note: Intro -- Title -- Copyright -- Contents -- Editor's Foreword -- Preface -- About Time -- Using the Yearbook of Astronomy as an Observing Guide -- The Monthly Star Charts -- Northern Hemisphere Star Charts David Harper -- Southern Hemisphere Star Charts David Harper -- The Planets in 2021 Lynne Marie Stockman -- Phases of the Moon in 2021 -- Eclipses in 2021 -- Some Events in 2021 -- Monthly Sky Notes and Articles 2021 -- January -- Astronomical Illustrations of the Nuremberg Chronicle Richard H. Sanderson -- February -- 2I/Borisov - Interstellar Comet Neil Norman -- March -- Alfred Fowler Jane Callaghan -- April -- Salyut 1: The First Space Station Neil Haggath -- May -- Thomas Henry Espinell Compton Espin: The Double Star Curate of Tow Law John McCue -- June -- The Star That Was Older Than the Universe: The Mystery of HD 140283 David Harper -- July -- Early Precariously Balanced Refractors Gary Yule -- August -- Spare a Thought for the Engineers Rod Hine -- September -- Burying the Sun Carolyn Kennett -- October -- Tinkering With Time: The British Standard Time Experiment at David Harper -- November -- Your Name in Space Peter Rea -- December -- Tycho Brahe Paul Fellows -- Comets in 2021 Neil Norman -- Minor Planets in 2021 Neil Norman -- Meteor Showers in 2021 Neil Norman -- Article Section -- Astronomy in 2020 Rod Hine -- Solar System Exploration in 2020 Peter Rea -- Anniversaries in 2021 Neil Haggath -- Mission to Mars: Countdown to Building a Brave New World Martin Braddock -- Male Family Mentors for Women in Astronomy: En'hedu'anna to Eimmart Mary McIntyre -- Henrietta Swan Leavitt and Her Work David M. Harland -- Solar Observing Peter Meadows -- The Meteorite Age Carolyn Kennett -- 'A Dignity That Insures Their Perpetuation' John C. Barentine -- Lunar Volcanism: The View 50 Years after Apollo Lionel Wilson. , Pages From the Past: Collecting Vintage Astronomy Books Richard H. Sanderson -- The Chances of Anything Coming From Mars Jan Hardy -- Māori Astronomy in Aotearoa-New Zealand Pauline Harris, Hēmi Whaanga and Rangi Matamua -- Miscellaneous -- Some Interesting Variable Stars Tracie Heywood -- Some Interesting Double Stars Brian Jones -- Some Interesting Nebulae, Star Clusters and Galaxies Brian Jones -- Astronomical Organizations -- Our Contributors -- Glossary Brian Jones and David Harper.
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  • 2
    Electronic Resource
    Electronic Resource
    Dietzia natronolimnaios sp. nov., a new member of the genus Dietzia isolated from an East African soda lake (1998)
    Springer
    Extremophiles 2 (1998), S. 359-366 
    Details
    ISSN: 1433-4909
    Keywords: Key wordsDietzia natronolimnaios sp. nov. ; Alkaliphile ; Soda lake ; 16S rDNA ; Phylogeny ; Chemotaxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two novel alkaliphilic aerobic organotrophic bacteria have been isolated from a moderately saline and alkaline East African soda lake. The new isolates grow at pH values between 6 and 10, with a pH optimum for growth of 9.0, and at a salt concentration between 0% and 10% (w/v). Phylogenetic analysis based on 16S rDNA sequence shows that these isolates are very closely related (99.6% similarity) and are members of the monospecific genus Dietzia (98.8% and 98.7% similarity). DNA/DNA hybridization revealed a relatedness of 83% between the two isolates, but only 8% between them and the type strain Dietzia maris. The G + C content as measured by thermal denaturation is 66.1 mol%. Phenotypic comparisons between D. maris and one isolate showed that they share very similar morphological and chemotaxonomic properties, but differ significantly in carbon source utilization profiles and halotolerance in alkaline medium. We propose a second species of this genus which we name Dietzia natronolimnaios (type strain 15LN1 = CBS 107.95).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007920050079
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Novel archaeal phylotypes from an East African alkaline saltern (1999)
    Springer
    Extremophiles 3 (1999), S. 139-145 
    Details
    ISSN: 1433-4909
    Keywords: Key words Halophile ; Haloalkaliphile ; Phylogeny ; Phylotype ; 16S rDNA ; Alkaline saltern ; Archaea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract DNA has been extracted on site from the brines of the final crystallizing pond of an alkaline saltern at Lake Magadi, Kenya. Amplification of 16S rRNA genes followed by cloning, sequencing, and phylogenetic analysis has revealed the presence of two distinct new archaeal lineages. The majority of cloned sequences showed greater than 95% identity to each other, but only 88%–90% similarity to any cultivated haloalkaliphilic Archaea, and form a distinct cluster within the known Haloarchaea. Two cloned genes showed close similarity to each other but only 76% similarity to any known archaeal sequence, and therefore represent a distinct phylotype only distantly related to the euryarchaeotal branch of the Archaea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007920050109
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