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  • 1
    Publication Date: 2023-04-19
    Keywords: DATE/TIME; ICESUR; Ice survey; Isotope ratio mass spectrometry; Nordaustlandet fjords, Svalbard; Rijpfjorden_BS; δ13C, algae; δ13C, standard deviation; δ15N, algae; δ15N, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 20 data points
    Location Call Number Limitation Availability
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  • 2
    Publication Date: 2023-07-05
    Keywords: Carbon, organic, particulate, mass per area; Carbon, organic, particulate, standard deviation; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard deviation; Carbon/Phosphorus ratio; Carbon/Phosphorus ratio, standard deviation; Chlorophyll a, areal concentration; Chlorophyll a, standard deviation; DATE/TIME; Element analyser, Thermo Finnigan flash EA 1112; Event label; ICESUR; Ice survey; Latitude of event; Longitude of event; Nitrogen, organic, particulate; Nitrogen, organic, particulate, standard deviation; Nitrogen/Phosphorus ratio; Nitrogen/Phosphorus ratio, standard deviation; Nordaustlandet fjords, Svalbard; Phosphorus, organic, particulate; Phosphorus, organic, standard deviation; Ratio; Rijpfjorden_BS; Rijpfjorden_RIB; Rijpfjorden_SH; Sample comment; Standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 166 data points
    Location Call Number Limitation Availability
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  • 3
    Publication Date: 2023-08-23
    Keywords: 6,9,12,15-Hexadecatetraenoic acid of total fatty acids; 6,9,12-Hexadecatrienoic acid of total fatty acids; all-cis-4,7,10,13,16,19-Docosahexaenoic acid of total fatty acids; all-cis-5,8,11,14,17-Eicosapentaenoic acid of total fatty acids; all-cis-6,9,12,15-Octadecatetraenoic acid of total fatty acids; all-cis-9,12,15-Octadecatrienoic acid of total fatty acids; all-cis-9,12-Octadecadienoic acid of total fatty acids; cis-11-Hexadecenoic acid of total fatty acids (IUPAC: (11Z)-hexadec-11-enoic acid); cis-7-Hexadecenoic acid of total fatty acids; cis-9-Hexadecenoic acid of total fatty acids (IUPAC: (9Z)-hexadec-9-enoic acid); cis-9-Octadecenoic acid of total fatty acids (IUPAC: Octadec-9-enoic acid); DATE/TIME; Docosanoic acid of total fatty acids; Event label; Fatty acids, standard deviation; Heptadecanoic acid of total fatty acids; Hexadecanoic acid of total fatty acids; High Performance Liquid Chromatography (HPLC); ICESUR; Ice survey; Latitude of event; Longitude of event; Monounsaturated fatty acids of total fatty acids; Nordaustlandet fjords, Svalbard; Octadecanoic acid of total fatty acids; Palmitolenic acid of total fatty acids; Pentadecanoic acid of total fatty acids; Polyunsaturated fatty acids of total fatty acids; Rijpfjorden_BS; Rijpfjorden_RIB; Rijpfjorden_SH; Sample comment; Saturated fatty acids of total fatty acids; Tetradecanoic acid of total fatty acids
    Type: Dataset
    Format: text/tab-separated-values, 400 data points
    Location Call Number Limitation Availability
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  • 4
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    PANGAEA
    In:  Supplement to: Vogedes, Daniel; Varpe, Øystein; Søreide, Janne E; Graeve, Martin; Berge, J; Falk-Petersen, Stig (2010): Lipid sac area as a proxy for individual lipid content of arctic calanoid copepods. Journal of Plankton Research, 32(10), 1471-1477, https://doi.org/10.1093/plankt/fbq068
    Publication Date: 2023-12-13
    Description: We present an accurate, fast, simple and non-destructive photographic method to estimate wax ester and lipid content in single individuals of the calanoid copepod genus Calanus and test this method against gas-chromatographic lipid measurements.
    Keywords: Area in square milimeter; Dry mass per individual; International Polar Year (2007-2008); IPY; Length; Life stage; Lipids; Lipids per individual; MULT; Multiple investigations; ORDINAL NUMBER; Percentage; Prosome, length; Svalbard; Wax esters; Wax esters per individual; Width
    Type: Dataset
    Format: text/tab-separated-values, 542 data points
    Location Call Number Limitation Availability
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  • 5
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    PANGAEA
    In:  Supplement to: Leu, Eva; Wiktor, Jozef M; Søreide, Janne E; Berge, J; Falk-Petersen, Stig (2010): Increased irradiance reduces food quality of sea ice algae. Marine Ecology Progress Series, 411, 49-60, https://doi.org/10.3354/meps08647
    Publication Date: 2023-12-13
    Description: The accelerating decrease of Arctic sea ice substantially changes the growth conditions for primary producers, particularly with respect to light. This affects the biochemical composition of sea ice algae, which are an essential high-quality food source for herbivores early in the season. Their high nutritional value is related to their content of polyunsaturated fatty acids (PUFAs), which play an important role for successful maturation, egg production, hatching and nauplii development in grazers. We followed the fatty acid composition of an assemblage of sea ice algae in a high Arctic fjord during spring from the early bloom stage to post bloom. Light conditions proved to be decisive in determining the nutritional quality of sea ice algae, and irradiance was negatively correlated with the relative amount of PUFAs. Algal PUFA content decreased on average by 40 % from April to June, while algal biomass (measured as particulate carbon, C) did not differ. This decrease was even more pronounced when algae were exposed to higher irradiances due to reduced snow cover. The ratio of chlorophyll a (chl a) to C, as well as the level of photoprotective pigments, confirmed a physiological adaptation to higher light levels in algae of poorer nutritional quality. We conclude that high irradiances are detrimental to sea ice algal food quality, and that the biochemical composition of sea ice algae is strongly dependent on growth conditions.
    Keywords: International Polar Year (2007-2008); IPY
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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  • 6
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    PANGAEA
    In:  Supplement to: Widdicombe, Stephen; Beesley, A; Berge, J A; Dashfield, S L; McNeill, C L; Needham, H R; Øxnevad, S (2013): Impact of elevated levels of CO2 on animal mediated ecosystem function: The modification of sediment nutrient fluxes by burrowing urchins. Marine Pollution Bulletin, 73(2), 416-427, https://doi.org/10.1016/j.marpolbul.2012.11.008
    Publication Date: 2024-03-15
    Description: A mesocosm experiment was conducted to quantify the relationships between the presence and body size of two burrowing heart urchins (Brissopsis lyrifera and Echinocardium cordatum) and rates of sediment nutrient flux. Furthermore, the impact of seawater acidification on these relationships was determined during this 40-day exposure experiment. Using carbon dioxide (CO2) gas, seawater was acidified to pHNBS 7.6, 7.2 or 6.8. Control treatments were maintained in natural seawater (pH = 8.0). Under normocapnic conditions, burrowing urchins were seen to reduce the sediment uptake of nitrite or nitrate whilst enhancing the release of silicate and phosphate. In acidified (hypercapnic) treatments, the biological control of biogeochemical cycles by urchins was significantly affected, probably through the combined impacts of high CO2 on nitrifying bacteria, benthic algae and urchin behaviour. This study highlights the importance of considering biological interactions when predicting the consequences of seawater acidification on ecosystem function.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Ammonium, flux; Animalia; Aragonite saturation state; Behaviour; Benthic animals; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Brissopsis lyrifera; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Comment; Echinocardium cordatum; Echinodermata; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Laboratory experiment; Mass; Mortality/Survival; Nitrate, flux; Nitrite, flux; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Phosphate, flux; Potentiometric; Potentiometric titration; Salinity; Salinity, standard deviation; Silicate, flux; Single species; Size; Species; Status; Temperate; Temperature, water; Temperature, water, standard deviation; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 4040 data points
    Location Call Number Limitation Availability
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 49 (1987), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Acetylcholinesterase (AChE) from housefly heads was purified by affinity chromatography. Three different native forms were separated by electrophoresis on poly-acrylamide gradient gels; Two hydrophilic forms presented apparent molecular weights of 75,000 (AChE1) and 150,000 (AChE2). A third component (AChE3) had a migration that depended on the nature and concentration of detergents. In the presence of sodium deoxycholate in the gel, AChE3 showed an apparent molecular weight very close to that of AChE2. Among the three forms, AChE3 was the only one found in purified membranes. The relationships among the various forms were investigated using reduction with 2-mercaptoethanol or proteolytic treatments. Such digestion converted purified AChE3 into AChE2 and AChE1, and reduction of AChE3 and AChE2 by 2-mercaptoethanol gave AChE1, in both cases with a significant loss of activity. These data indicate that the three forms of purified AChE may be classified as an active hydrophilic monomeric unit (G1) plus hydrophilic and amphiphilic dimers. These two components were termed G2sand G2m, where “s” refers to soluble and “m” to membrane bound.).
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 69 (1962), S. 0 
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    FEBS Letters 238 (1988), S. 333-337 
    ISSN: 0014-5793
    Keywords: (Drosophila) ; Acetylcholinesterase ; Polypeptide
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Pesticide Biochemistry and Physiology 45 (1993), S. 1-6 
    ISSN: 0048-3575
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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