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  • 1
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    Biogenic barium flux in the eastern equatorial Pacific Ocean (2020)
    PANGAEA
    Details
    Publication Date: 2023-02-08
    Description: We present the first regional-scale records of biogenic Barium (xsBa) fluxes in the Panama basin of the eastern-equatorial margin of the Pacific Ocean in order to assess xsBa as a paleoproductivity proxy. Measurements of xsBa from thirteen cores that range in water depths from about 700 ¬¬to 3000 m show an increase in 230Th normalized xsBa mass accumulation rates (MARs) with increasing water depth during both Marine Oxygen Isotope Stages (MIS) 1 and 2. The correlation of xsBa MARs with depth are strong despite differences in bulk sediment mass accumulation rates and differing degrees of sediment redistribution. We interpret the increasing xsBa with water depth as likely due to the continued decomposition and remineralization of falling and/or resuspended biogenic particles. xsBa does not seem to be affected by diagenetic sulfate reduction in most of the cores. Calculated estimates of xsBa preservation in the sediment pile are high and fluctuate between 45% - 52% throughout the last 25 kyr. Although xsBa fluxes can be a robust indicator of paleoproductivity, caution is needed if a) there is evidence of sulfate reduction in sediments being analyzed, and b) one is trying to quantify differences in paleoproductivity among sites that are located at different depths in the water column.
    Keywords: 230Th; AGE; Aluminium; authigenic Uranium (Uauth); Barite dissolution; Barium; Barium excess; Biogenic Barium (xsBa); DEPTH, sediment/rock; Eastern Equatorial Pacific Ocean; Event label; Latitude of event; Longitude of event; Melville; MUC; MultiCorer; MV1014; MV1014-01-1MC; MV1014-01-7MC; MV1014-02-16MC; MV1014-02-9MC; paleoproductivity; Panama Basin
    Type: Dataset
    Format: text/tab-separated-values, 124 data points
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    DATA PANGAEA
  • 2
    Electronic Resource
    Electronic Resource
    Technetium-99m dextran: a promising new protein-losing enteropathy imaging agent (1996)
    Springer
    European journal of nuclear medicine 23 (1996), S. 575-578 
    Details
    ISSN: 1619-7089
    Keywords: Protein-losing enteropathy ; Imaging ; Technetium-99m dextran
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The purpose of this study was to evaluate technetium-99m dextran (99mTc-Dx; molecular weight 81000) as a prospective protein-losing enteropathy (PLE) imaging agent. Twenty-two patients with diseases commonly associated with PLE and 12 healthy control subjects underwent intravenous99mTc-Dx scintigraphy. All of the 22 test patients showed significant radiotracer accumulation in the intestines within 3–4 h post injection. The focal, regional or generalised nature of the enteropathy and involvement of the large or small intestine could be identified in most cases. Four of the 12 apparently healthy subjects also showed minimal accumulation in the abdominal area occurring late in the study period. This could have been physiological, related to food habits or due to unsuspected intestinal worms. We attribute the high sensitivity of99mTc-Dx to its relatively fast blood (background) clearance. The radiotracer may have several other advantages over99mTc-labelled human serum albumin in imaging PLE.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00833395
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Characterization by pulse-field electrophoresis of a new region of DNA amplification containing the M2 subunit of ribonucleotide reductase in hydroxyurea-resistant Leishmania (1999)
    Springer
    Parasitology research 85 (1999), S. 188-193 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract An extrachromosomal circular DNA of approximately 50-kb size was amplified in the hydroxyurea-resistant variant of Leishmania mexicana amazonensis. The amplicon carried the M2 gene of ribonucleotide reductase as part of the gene encoding resistance to hydroxyurea. The amplicon was unstable. It disappeared rapidly as shown in pulse-field gradient electrophoresis gels after reversion of the cells for 20–80 days. This loss of amplified DNA was accompanied by a rapid loss of resistance to hydroxyurea during the same period. The amplicon was not hybridized to specific probes from any of the four regions of DNA amplification previously reported for Leishmania. This region of amplification thus appears to be a new region of DNA amplification in Leishmania.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004360050533
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    Paper (German National Licenses)
    Fulltext
  • 4
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    Dendrocalamus strictus ((Roxb.) Nees): A Suitable Host for the Maintenance and Propagation of AM Fungi under Temperate Conditions (2013)
    International Scholarly Research Network (ISRN)
    Details
    Publication Date: 2013-08-30
    Description: Dendrocalamus strictus ((Roxb.) Nees) was tested as a perennial host plant for propagation of an arbuscular mycorrhizal (AM) fungal consortium, initially isolated from rhizosphere of tea plants growing in the colder regions. The host performance in terms of colonization and spore production was compared with two annual hosts. The mycorrhizal dependency and growth enhancement potential were analyzed to test the suitability of D. strictus as a host plant. After 90 days of growth, 77.2% roots of D. strictus were found to be colonized by AM fungi with a spore count of 7 per g soil. AM fungal colonization and spore density values were lower in case of the host plants tested. Growth of D. strictus plants was found to be enhanced, in terms of all studied parameters; significant increases were recorded in shoot length as well as fresh and dry weight of shoots, a part of commercial importance. Similarly, P content, protein concentration, chlorophyll a and chlorophyll b contents were found to increase significantly. These data suggest that D. strictus can be used for the multiplication of AM fungi, isolated originally from the rhizosphere of tea; simultaneously, higher shoot biomass can provide additional economic benefit, using this environment friendly technology.
    Electronic ISSN: 2090-875X
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by International Scholarly Research Network (ISRN)
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    PAPER CURRENT
  • 5
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    Unknown
    Dendrocalamus strictus ((Roxb.) Nees): A Suitable Host for the Maintenance and Propagation of AM Fungi under Temperate Conditions (2012)
    International Scholarly Research Network (ISRN)
    Details
    Publication Date: 2012-08-16
    Description: Dendrocalamus strictus ((Roxb.) Nees) was tested as a perennial host plant for propagation of an arbuscular mycorrhizal (AM) fungal consortium, initially isolated from rhizosphere of tea plants growing in the colder regions. The host performance in terms of colonization and spore production was compared with two annual hosts. The mycorrhizal dependency and growth enhancement potential were analyzed to test the suitability of D. strictus as a host plant. After 90 days of growth, 77.2% roots of D. strictus were found to be colonized by AM fungi with a spore count of 7 per g soil. AM fungal colonization and spore density values were lower in case of the host plants tested. Growth of D. strictus plants was found to be enhanced, in terms of all studied parameters; significant increases were recorded in shoot length as well as fresh and dry weight of shoots, a part of commercial importance. Similarly, P content, protein concentration, chlorophyll a and chlorophyll b contents were found to increase significantly. These data suggest that D. strictus can be used for the multiplication of AM fungi, isolated originally from the rhizosphere of tea; simultaneously, higher shoot biomass can provide additional economic benefit, using this environment friendly technology.
    Electronic ISSN: 2090-875X
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by International Scholarly Research Network (ISRN)
    Location Call Number Limitation Availability
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    PAPER CURRENT
  • 6
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    Unknown
    Dendrocalamus strictus ((Roxb.) Nees): A Suitable Host for the Maintenance and Propagation of AM Fungi under Temperate Conditions (2012)
    International Scholarly Research Network (ISRN)
    Details
    Publication Date: 2012-10-17
    Description: Dendrocalamus strictus ((Roxb.) Nees) was tested as a perennial host plant for propagation of an arbuscular mycorrhizal (AM) fungal consortium, initially isolated from rhizosphere of tea plants growing in the colder regions. The host performance in terms of colonization and spore production was compared with two annual hosts. The mycorrhizal dependency and growth enhancement potential were analyzed to test the suitability of D. strictus as a host plant. After 90 days of growth, 77.2% roots of D. strictus were found to be colonized by AM fungi with a spore count of 7 per g soil. AM fungal colonization and spore density values were lower in case of the host plants tested. Growth of D. strictus plants was found to be enhanced, in terms of all studied parameters; significant increases were recorded in shoot length as well as fresh and dry weight of shoots, a part of commercial importance. Similarly, P content, protein concentration, chlorophyll a and chlorophyll b contents were found to increase significantly. These data suggest that D. strictus can be used for the multiplication of AM fungi, isolated originally from the rhizosphere of tea; simultaneously, higher shoot biomass can provide additional economic benefit, using this environment friendly technology.
    Electronic ISSN: 2090-875X
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by International Scholarly Research Network (ISRN)
    Location Call Number Limitation Availability
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    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    Dendrocalamus strictus ((Roxb.) Nees): A Suitable Host for the Maintenance and Propagation of AM Fungi under Temperate Conditions (2012)
    International Scholarly Research Network (ISRN)
    Details
    Publication Date: 2012-06-21
    Description: Dendrocalamus strictus ((Roxb.) Nees) was tested as a perennial host plant for propagation of an arbuscular mycorrhizal (AM) fungal consortium, initially isolated from rhizosphere of tea plants growing in the colder regions. The host performance in terms of colonization and spore production was compared with two annual hosts. The mycorrhizal dependency and growth enhancement potential were analyzed to test the suitability of D. strictus as a host plant. After 90 days of growth, 77.2% roots of D. strictus were found to be colonized by AM fungi with a spore count of 7 per g soil. AM fungal colonization and spore density values were lower in case of the host plants tested. Growth of D. strictus plants was found to be enhanced, in terms of all studied parameters; significant increases were recorded in shoot length as well as fresh and dry weight of shoots, a part of commercial importance. Similarly, P content, protein concentration, chlorophyll a and chlorophyll b contents were found to increase significantly. These data suggest that D. strictus can be used for the multiplication of AM fungi, isolated originally from the rhizosphere of tea; simultaneously, higher shoot biomass can provide additional economic benefit, using this environment friendly technology.
    Electronic ISSN: 2090-875X
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by International Scholarly Research Network (ISRN)
    Location Call Number Limitation Availability
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    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    Dendrocalamus strictus ((Roxb.) Nees): A Suitable Host for the Maintenance and Propagation of AM Fungi under Temperate Conditions (2013)
    International Scholarly Research Network (ISRN)
    Details
    Publication Date: 2013-01-22
    Description: Dendrocalamus strictus ((Roxb.) Nees) was tested as a perennial host plant for propagation of an arbuscular mycorrhizal (AM) fungal consortium, initially isolated from rhizosphere of tea plants growing in the colder regions. The host performance in terms of colonization and spore production was compared with two annual hosts. The mycorrhizal dependency and growth enhancement potential were analyzed to test the suitability of D. strictus as a host plant. After 90 days of growth, 77.2% roots of D. strictus were found to be colonized by AM fungi with a spore count of 7 per g soil. AM fungal colonization and spore density values were lower in case of the host plants tested. Growth of D. strictus plants was found to be enhanced, in terms of all studied parameters; significant increases were recorded in shoot length as well as fresh and dry weight of shoots, a part of commercial importance. Similarly, P content, protein concentration, chlorophyll a and chlorophyll b contents were found to increase significantly. These data suggest that D. strictus can be used for the multiplication of AM fungi, isolated originally from the rhizosphere of tea; simultaneously, higher shoot biomass can provide additional economic benefit, using this environment friendly technology.
    Electronic ISSN: 2090-875X
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by International Scholarly Research Network (ISRN)
    Location Call Number Limitation Availability
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    PAPER CURRENT
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