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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/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_933773_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_933773_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_933773_v1/ public [RR2004 Dissolved Trace Metals] - Dissolved concentrations of the trace metals Mn, Cd, Co, Cu, Ni, Zn, and Pb in vertical profile seawater samples from the upper 1,000 meters of the water column collected on R/V Roger Revelle cruise RR2004 in the south Pacific Ocean from Jan-Feb 2021 (Collaborative Research: Biogeochemical and Physical Conditioning of Sub-Antarctic Mode Water in the Southern Ocean) This dataset includes dissolved (<0.4 micrometers) concentrations of the trace metals Mn, Cd, Co, Cu, Ni, Zn, and Pb in vertical profile seawater samples (upper ~1000 meters), collected on cruise RR2004 (on R/V Roger Revelle) in the south Pacific Ocean from 30 degrees South latitude to 60 degrees South along the 150 degrees West meridian. Water was collected using nine 5-liter trace metal Niskin-X bottles, suspended from Kevlar line and triggered to close with Teflon messengers. Pressure depth and temperature were determined using a data logger secured to the deepest bottle. These data are part of the NSF project \"Collaborative Research: Biogeochemical and Physical Conditioning of Sub-Antarctic Mode Water in the Southern Ocean\", which focused on the biological, physical, and chemical surface water properties across the polar and subpolar fronts of the south Pacific Ocean, especially as they related to the phytoplankton communities of coccolithophores and diatoms. Samples were collected by Dr. Pete Morton (Florida State University), Dr. Jule Middleton (MIT/WHOI), Dr. Logan Tegler (MIT/WHOI), and Lauren Hearn (Florida State University). Samples were analyzed by Dr. Pete Morton with assistance from Dr. Salvatore Caprara (University of South Florida-St Petersburg) at the National High Magnetic Field Laboratory.\n\ncdm_data_type = Other\nVARIABLES:\nStation (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nDate_collected (unitless)\ndepth (m)\nMn (nanomoles per liter (nmol/L))\nMn_SD (nanomoles per liter (nmol/L))\nCd (picomoles per liter (pmol/L))\nCd_SD (picomoles per liter (pmol/L))\nCo (picomoles per liter (pmol/L))\nCo_SD (picomoles per liter (pmol/L))\nCu (nanomoles per liter (nmol/L))\nCu_SD (nanomoles per liter (nmol/L))\nNi (nanomoles per liter (nmol/L))\n... (6 more variables)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_933773_v1_fgdc.xml https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_933773_v1_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_933773_v1/index.htmlTable https://osprey.bco-dmo.org/dataset/933773 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_933773_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_933773_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_933773_v1

 
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