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  • 1
    Electronic Resource
    Electronic Resource
    Effect of food type and placement on earthworm (Aporrectodea tuberculata) burrowing and soil turnover (1996)
    Springer
    Biology and fertility of soils 21 (1996), S. 201-206 
    Details
    ISSN: 1432-0789
    Keywords: Key words Earthworm ; Burrowing ; Residue ; Bioturbation ; Aporrectodea tuberculata ; Microcosms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Subsurface-dwelling Aporrectodea tuberculata, a common earthworm in Upper-Midwest (USA) agricultural fields, may be a significant component of agroecosystems with regard to soil mixing and preferential transport of water and chemicals. In this study we looked at effects of food residue placement and food type on A. tuberculata burrowing and soil turnover in two-dimensional Evans box microcosms. Four food residue placements mimicked patterns induced by primary tillage and two food types, readily available and natural food sources, with no food as a control. An average earthworm population of 100 earthworms m–2 was calculated to generate 1058 km ha–1 of new burrows and turnover 7.9 Mg ha–1 of soil in 1 week of activity at 20°C. Burrowing was random until food sources were encountered, at which time burrowing appeared to center around the food source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335936
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Effect of food type and placement on earthworm (Aporrectodea tuberculata) burrowing and soil turnover (1996)
    Springer
    Biology and fertility of soils 21 (1996), S. 201-206 
    Details
    ISSN: 1432-0789
    Keywords: Earthworm ; Burrowing ; Residue ; Bioturbation ; Aporrectodea tuberculata ; Microcosms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Subsurface-dwelling Aporrectodea tuberculata, a common earthworm in Upper-Midwest (USA) agricultural fields, may be a significant component of agroeco-systems with regard to soil mixing and preferential transport of water and chemicals. In this study we looked at effects of food residue placement and food type on A. tuberculata burrowing and soil turnover in two-dimensional Evans box microcosms. Four food residue placements mimicked patterns induced by primary tillage and two food types, readily available and natural food sources, with no food as a control. An average earthworm population of 100 earthworms m-2 was calculated to generate 1058 km ha-1 of new burrows and turnover 7.9 Mg ha-1 of soil in 1 week of activity at 20°C. Burrowing was random until food sources were encountered, at which time burrowing appeared to center around the food source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335936
    Location Call Number Expected Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Duplicating a tangled genome (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-09-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cook, P -- New York, N.Y. -- Science. 1998 Sep 4;281(5382):1466-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Sir William Dunn School of Pathology, Oxford OX2 3RE, UK. peter.cook@path.ox.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9750117" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/*metabolism ; *DNA Replication ; *Genome ; Genome, Human ; Humans ; Models, Biological ; *Transcription, Genetic
    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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  • 4
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    The organization of replication and transcription (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-12
    Description: Models for replication and transcription often display polymerases that track like locomotives along their DNA templates. However, recent evidence supports an alternative model in which DNA and RNA polymerases are immobilized by attachment to larger structures, where they reel in their templates and extrude newly made nucleic acids. These polymerases do not act independently; they are concentrated in discrete "factories," where they work together on many different templates. Evidence for models involving tracking and immobile polymerases is reviewed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cook, P R -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1999 Jun 11;284(5421):1790-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, UK. Peter.Cook@Path.OX.AC.UK〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10364545" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *DNA Replication ; DNA-Directed DNA Polymerase/*metabolism ; DNA-Directed RNA Polymerases/*metabolism ; Humans ; Models, Genetic ; Replication Origin ; Templates, Genetic ; *Transcription, Genetic
    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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