A gas flow multicounter (GM multicounter) is used for counting low-level beta doses. GM multicounters can be used for gas proportional counting of 32Si to 32P. For more information about GM multicounter usage see Krause et. al. 2011.
Dataset Name | PI-Supplied Description | PI-Supplied Name |
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Silicon Uptake Kinetics sampled aboard the R/V Pelican during during PE17-04 and PE17-20 along the Northern Gulf of Mexico, specifically the Louisiana Shelf region dominated by the discharge of the Mississippi River plume. | Quantification of 32Si activity was done on a GM 25 Multicounters (Risø National Laboratory, Technical University of Denmark), each are configured to analyze five samples simultaneously. System setup includes an anti-coincidence module, which with considerable lead shielding reduces background activity to | GM 25 Multicounters (Risø National Laboratory, Technical University of Denmark) |
Water column data sampled aboard the R/V Pelican during August and September 2016 and May 2017 in Northern Gulf of Mexico, specifically the Louisiana Shelf region dominated by the discharge of the Mississippi River plume. | Quantification of 32Si activity was done on a GM 25 Multicounters (Risø National Laboratory, Technical University of Denmark), each are configured to analyze five samples simultaneously. System setup includes an anti-coincidence module, which with considerable lead shielding reduces background activity to | GM 25 Multicounters (Risø National Laboratory, Technical University of Denmark) |
Results from a laboratory-based investigation into sediment Silicon sorption capacities using standardized clay samples and the radioactive tracer 32Si | GM-24 Multicounter (Risø DTU National Laboratory, Denmark) | |
Sediment trap carbon, nitrogen, and isotope, pigment, and 234Th flux from deployments during R/V Nancy Foster cruises NF1704 and NF1802 in the Gulf of Maine in May of 2017 and 2018. | low-background RISO beta multi-counter | |
Particulate organic carbon, nitrogen, and 234Th during the 2012-2013 Palmer Field Season (WAP Carbon export project) | Samples from six euphotic zone depths (surface to 65 meters) were counted in a RISO low-level beta multi-counter to determine the activity of 234Th. | Riso low-level GM beta multi-counter |
Collected sediment trap samples were dried, mounted in RISO planchets and counted on a RISO low-level beta multi-counter. | Riso low-level GM beta multi-counter | |
Collected sediment trap samples were dried, mounted in RISO planchets and counted on a RISO low-level beta multi-counter. | Riso low-level GM beta multi-counter | |
Total water column 234Th during the 2012-2013 Palmer Field Season (WAP Carbon export project) | Samples were then vacuum filtered at high vacuum pressure through a quartz (QMA) filter. Filters were mounted in RISO planchets and counted on a RISO low-level beta multi-counter at Palmer Station. | Riso low-level GM beta multi-counter |
Water column particulate silica, standing stocks, and productivity rates from R/V Atlantic Explorer cruises AE1218, AE1228, AE1319, AE1322 in Bermuda, and NW Atlantic from 2012-2013 (Si_in_Syn project) | GM Multicounter (Riso National Laboratory, Technical University of Denmark). | GM Multicounter |
Synechococcus cell silica uptake from cultures with added nutrients from laboratory experiments at the Dauphin Island Sea Lab between 2013 and 2015 (Si_in_Syn project) | GM 25-5 multicounters (Risø National Laboratory, Technical University of Denmark). | GM 25-5 multicounter |
Synechococcus silica uptake rates from cultures with and without added orthophospate from laboratory experiments at the Dauphin Island Sea Lab from August of 2013 to September of 2014 (Si_in_Syn project) | Manufactured by Riso Laboratories | GM 25-5 multicounter |
Silica uptake by Synechococcus cells in response to a gradient of silicic acid concentrations from lab experiments at Dauphin Island Sea Lab and University of Santa Barbara between 2012-2015 (Si_in_Syn project) | GM 25-5 multicounters (Risø National Laboratory, Technical University of Denmark) | GM 25-5 multicounter |