7009 to 7020 of 13838 results
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High-resolution vector velocity determinations from the dynasonde
Read more of: High-resolution vector velocity determinations from the dynasondeLine-of-sight Doppler velocity V∗ and three-dimensional apparent echolocation (XL, YL, ZL), are among the principal parameters available for each ionospheric echo from most observing modes of the dynasonde. An ensemble […]
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An Automatic Respirometer for use with Small Invertebrates
Read more of: An Automatic Respirometer for use with Small Invertebrates1. An automatic respirometer is described which has been developed to measure the rate of oxygen consumption by small arthropods in closed chambers. 2. The instrument removes 0.5 mul subsamples […]
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Antarctic snow record of southern hemisphere lead pollution
Read more of: Antarctic snow record of southern hemisphere lead pollutionLead concentrations from an Antarctic snow pit show the pattern of Pb reaching the Antarctic atmosphere over the last 70 years. Between 1920 and 1950, the Pb concentration shows significant […]
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Capture and scanning electron microscopy of individual snow crystals
Read more of: Capture and scanning electron microscopy of individual snow crystalsA snow crystal has been successfully collected on to a scanning electron microscope (SEM) stub in central Greenland. It was preserved at liquid-nitrogen temperature for 5 months, prior to examination […]
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Structural setting and timing of hydrothermal veins and breccias on Hurd Peninsula, South Shetland Islands: a possible volcanic-related epithermal system in deformed turbidites
Read more of: Structural setting and timing of hydrothermal veins and breccias on Hurd Peninsula, South Shetland Islands: a possible volcanic-related epithermal system in deformed turbiditesQuartz veins and vein-breccias in a greywacke-shale sequence of ?Carboniferous-Triassic age were previously regarded as mesothermal silicified fault breccias, and related to an adjacent Eocene granodiorite pluton. New mapping of […]
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Distribution and abundance of seabirds and fur seals near the Antarctic Peninsula during the austral winter, 1986
Read more of: Distribution and abundance of seabirds and fur seals near the Antarctic Peninsula during the austral winter, 1986Twenty one species of seabirds plus fur seals were observed at sea near the Antarctic Peninsula, between 60 °–68 °S, in May and June 1986, a season for which few […]
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Geochronology and radiogenic isotope geology of Mesozoic rocks from eastern Palmer Land, Antarctic Peninsula: crustal anatexis in arc-related granitoid genesis
Read more of: Geochronology and radiogenic isotope geology of Mesozoic rocks from eastern Palmer Land, Antarctic Peninsula: crustal anatexis in arc-related granitoid genesisRb Sr and Sm Nd analyses, as well as a few new K Ar dates, are presented for plutonic igneous, meta-igneous and metasedimentary rocks from the central Black Coast area […]
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Isoswertiajaponin 2′’-O-β-arabinopyranoside and other flavone-C-glycosides from the Antarctic grass Deschampsia antarctica
Read more of: Isoswertiajaponin 2′’-O-β-arabinopyranoside and other flavone-C-glycosides from the Antarctic grass Deschampsia antarcticaThe major flavonoid constituents of the Antarctic grass, Deschampsia antarctica, are shown to be the C-glycosylflavones, isoswertiajaponin (7-O-methylorientin) 2′’-O-β-arabinopyranoside and orientin. These are accompanied by lower levels of orientin 2′’-O-arabinopyranoside, […]
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A laboratory investigation of two ultraviolet spectroradiometers
Read more of: A laboratory investigation of two ultraviolet spectroradiometersSpectral measurements of the solar UV irradiance at the earth’s surface depend critically on the characteristics of the spectroradiometers and the procedures used in their calibration. Two UV spectroradiometers were […]
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Antarctica-New Zealand rifting and Marie Byrd Land lithospheric magmatism linked to ridge subduction and mantle plume activity
Read more of: Antarctica-New Zealand rifting and Marie Byrd Land lithospheric magmatism linked to ridge subduction and mantle plume activityMid-Cretaceous igneous rocks of central Marie Byrd Land, Antarctica record a rapid change from subduction-related to rift-related magmatism. This correlates with the final stages of subduction of the Phoenix plate […]