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Narinx E., Davail S., Geller G. & Gerday C. (1992). Nucleotide and derived amino acid sequence of the subtilisin from the antarctic psychotroph Bacillus TA39. Biochim. Biophys. Acta, 1131(1), 111–113.
Abstract: The nucleotide sequence of the subtilisin-encoding gene from the antactic psychotroph Bacillus TA39 was determined. The primary structure of the subtilisin precursor is composed of 420 amino acids giving rise to a mature enzyme of 309 amino acids. Asp-145, His-185 and Ser-361 are the proposed catalytic residues of the active site
Keywords: Bacillus ; Subtilisin ; Nucleotide sequence ; Aminoacid sequence ; Bacillaceae ; Bacillales ; Bacteria ; Enzyme
Programme: 165
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Frenot Y., Convey P., Lebouvier M., Chown S.L., Whinam J., Selkirk P.M., Skotnicki M. & Bergstrom D.M. (2008). Antarctic and Subantarctic Biological Invasions: Sources, extents, impacts and implications. Gateway Antarctica, 801, 53–96.
Abstract: In Rogan-Finnemore M. (ed) Non-native species in the Antarctic. Gateway Antarctica Special Publication Series, Number 0801
Programme: 136
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Morganti Andrea; Becagli Silvia; Castellano Emiliano; Severi Mirko; Traversi Rita; Udisti Roberto. (2007). An improved flow analysis-ion chromatography method for determination of cationic and anionic species at trace levels in Antarctic ice cores. Anal. Chim. Acta, 603(2), 190–198.
Abstract: A method was developed for the quantitative determination of cations and anions in Antarctic ice cores at microgL(-1) and sub-microgL(-1) levels by ion chromatography (IC), after ultra-clean decontamination procedures. Strict manipulation and decontamination procedures were used in sub-sampling, in order to minimise sample contamination. Na+, NH4+, K+, Mg2+ and Ca2+ were determined by 12-min isocratic elution (H2SO4 eluent). Contemporaneously, in a parallel device, F-, MSA (methanesulfonic acid), Cl-, NO3- and SO4(2-) were analysed in a single 12-min run with multiple-step elution using Na2CO3/NaHCO3 as eluent. Melted ice samples were pumped from their still-closed containers (polystyrene accuvettes with polyethylene caps), shared between the two ion chromatographic systems, online filtered (0.45 microm Teflon membrane) and pre-concentrated (anions and cations pre-concentration columns) using a flow analysis system, thus avoiding uptake of contaminants from the laboratory atmosphere. Sensitivity, linear range, reproducibility and detection limit were evaluated for each chemical species. Anion or cation detection limits ranged from 0.01 to 0.15 microgL(-1) by using a relatively small sample volume (1.5 mL). Such values are significantly lower than those reported in literature for almost all the components. These methods were successfully applied to the analysis of cations and anions at trace levels in the Dome C ice core. The composition of the atmospheric aerosol for the last 850 kyr was reconstructed by high-resolution continuous chemical stratigraphies. Concentration trends in the last nine glacial-interglacial climatic cycles were shown and briefly discussed.
Programme: 1181
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Talbot, D.A.; Duchamp, C.; Rey, B.; Hanuise, N.; Rouanet, J.L.; Sibille, B.; Brand, M.D. (2004). Uncoupling protein and ATP/ADP carrier increase mitochondrial proton conductance after cold adaptation of king penguins. J. Physiol. (Lond.), 558(1), 123–135.
Abstract: Juvenile king penguins develop adaptive thermogenesis after repeated immersion in cold water. However, the mechanisms of such metabolic adaptation in birds are unknown, as they lack brown adipose tissue and uncoupling protein-1 (UCP1), which mediate adaptive non-shivering thermogenesis in mammals. We used three different groups of juvenile king penguins to investigate the mitochondrial basis of avian adaptive thermogenesis . Skeletal muscle mitochondria isolated from penguins that had never been immersed in cold water showed no superoxide-stimulated proton conductance, indicating no functional avian UCP. Skeletal muscle mitochondria from penguins that had been either experimentally immersed or naturally adapted to cold water did possess functional avian UCP, demonstrated by a superoxide-stimulated, GDP-inhibitable proton conductance across their inner membrane. This was associated with a markedly greater abundance of avian UCP mRNA. In the presence (but not the absence) of fatty acids, these mitochondria also showed a greater adenine nucleotide translocase-catalysed proton conductance than those from never-immersed penguins. This was due to an increase in the amount of adenine nucleotide translocase. Therefore, adaptive thermogenesis in juvenile king penguins is linked to two separate mechanisms of uncoupling of oxidative phosphorylation in skeletal muscle mitochondria: increased proton transport activity of avian UCP (dependent on superoxide and inhibited by GDP) and increased proton transport activity of the adenine nucleotide translocase (dependent on fatty acids and inhibited by carboxyatractylate).
Programme: 131
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Barthelemy M, Lystrup M B, Menager H, Miller S, Lilensten J,. (2011). First detection of polarization in jovian auroral H+3 emissions. A&A, 530.
Keywords: polarization / molecular data / planets and satellites: aurorae / planets and satellites: individual: Jupiter
Programme: 1026
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Vernin, J.; Chadid, M.; Aristidi, E.; Agabi, A.;Trinquet, H.; van der Swaelmen, M. (2009). First single star scidar measurements at Dome C, Antarctica. ASTRONOMY & ASTROPHYSICS, 500(3), 1271–1276.
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Ziad, E. Aristidi, A. Agabi, J. Borgnino, F. Martin, E. Fossat. (2008). First statistics of turbulence outer scale at Dome C. Astronomy & astrophysics, 491, 917–921.
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Klein, K.-L., Krucker, S., Lointier, G. & Kerdraon, A. (2008). Open magnetic flux tubes in the corona and the transport of solar energetic particles. Astronomy & astrophysics, 486, 589.
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Planchon F A.M., Boutron C.F., Barbante C., Wolff E.W., Cozzi G., Gaspaii V., Ferrari C.P. & Cescon P. (2001). Ultrasensitive determination of heavy metals at the sub pictogram per gram level in ultraclean Antarctic snow samples by Inductively Coupled Plasma Sector Field Mass Spectrometry. Anal. Chim. Acta, 450(1-2), 93–205.
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ANGELIER J., BERGERAT F., BELLOU M. et STEFANSSON R. (2008). Seismotectonics of a newly formed transform zone near a hot spot: earthquake mechanisms and regional stress in the South Iceland Seismic Zone. Tectonophysics, 447, 95–116.
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