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https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_764664 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_764664.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_764664/ public [Log_Kd] - Partition coefficient of 234Th, 233Pa, 210Pb, 210Po, and 7Be (Biopolymers as carrier phases for selected natural radionuclides (of Th, Pa, Pb, Po, Be) in diatoms and coccolithophores) Laboratory studies were conducted to examine the sorption of selected radionuclides (234Th, 233Pa, 210Po, 210Pb, and 7Be) onto inorganic (pure silica and acid-cleaned diatom frustules) and organic (diatom cells with or without silica frustules) particles in natural seawater and the role of templating biomolecules and exopolymeric substances (EPS) extracted from the same species of diatom, Phaeodactylum tricornutum, in the sorption process. The range of partition coefficients (Kd, reported as logKd) of radionuclides between water and the different particle types was 4.78\\u20136.69 for 234Th, 5.23\\u20136.71 for 233Pa, 4.44\\u20135.86 for 210Pb, 4.47\\u20134.92 for 210Po, and 4.93\\u20137.23 for 7Be, similar to values reported for lab and field determinations. The sorption of all radionuclides was significantly enhanced in the presence of organic matter associated with particles, resulting in Kd one to two orders of magnitude higher than for inorganic particles only, with highest values for 7Be (logKd of 7.2). Results further indicate that EPS and frustule-embedded biomolecules in diatom cells are responsible for the sorption enhancement rather than the silica shell itself. By separating radiolabeled EPS via isoelectric focusing, we found that isoelectric points are radionuclide specific, suggesting that each radionuclide binds to specific biopolymeric functional groups, with the most efficient binding sites likely occurring in acid polysaccharides, iron hydroxides, and proteins. Further progress in evaluating the effects of diatom frustule\\u2013related biopolymers on binding, scavenging, and fractionation of radionuclides would require the application of molecular-level characterization techniques.\n\ncdm_data_type = Other\nVARIABLES:\nParticle_type (unitless)\nBe (kilogram per liter (kg/L))\nBe_sd (kilogram per liter (kg/L))\nPa (kilogram per liter (kg/L))\nPa_sd (kilogram per liter (kg/L))\nTh (kilogram per liter (kg/L))\nTh_sd (kilogram per liter (kg/L))\nPo (kilogram per liter (kg/L))\nPo_sd (kilogram per liter (kg/L))\nPb (kilogram per liter (kg/L))\nPb_sd (kilogram per liter (kg/L))\n https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_764664_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_764664/index.htmlTable https://www.bco-dmo.org/dataset/764664 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_764664.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_764664&showErrors=false&email= BCO-DMO bcodmo_dataset_764664
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_751313 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_751313.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_751313/ public [Particle AA CSIA ALOHA: Amino acid specific isotopes in particles] - Amino acid compound specific isotope values for particles from R/V Kilo Moana KM1407 and KM1418 in the Central North Pacific, Station ALOHA, Tropical Pacific, Feb and Sept. 2014 (Collaborative Research: Isotopic insights to mercury in marine food webs and how it varies with ocean biogeochemistry) This dataset contains amino acid compound specific nitrogen isotope ratios in particles collected during R/V Kilo Moana cruises around Station ALOHA (KM1407 and KM1418). For more information about the ALOHA observatory see: http://aco-ssds.soest.hawaii.edu/. These data were published in Gloeckler et al (2018), Supporting Information file lno10762-sup-0002-suppinfo2.xlsx\n\ncdm_data_type = Other\nVARIABLES:\nParticle_size (microns)\nSample (unitless)\ndepth (m)\ndelta15N (Delta15 N, permil)\ndelta15N_stdev (Delta15 N Stdev, permil)\ncomment (unitless)\n https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_751313_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_751313/index.htmlTable https://www.bco-dmo.org/dataset/751313 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_751313.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_751313&showErrors=false&email= BCO-DMO bcodmo_dataset_751313

 
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