Dissolved-oxygen quenching of in-situ fluorescence measurements

1993 ◽  
Author(s):  
Wayne Chudyk ◽  
David Tonaszuck ◽  
Kenneth Pohlig
Keyword(s):  
Dissolved Oxygen ◽  
Oxygen Quenching ◽  
Fluorescence Measurements

scholarly journals Simple quality control technique to identify dissolved oxygen diffusion issues with biochemical oxygen demand bottle incubations

2017 ◽  
Author(s):  
Johnathan Daniel Maxey ◽  
Neil David Hartstein ◽  
Dorathy Penjinus ◽  
Alan Kerroux
Keyword(s):  
Dissolved Oxygen ◽  
Water Column ◽  
Biochemical Oxygen Demand ◽  
Oxygen Demand ◽  
Freshwater Ecosystems ◽  
Control Technique ◽  
Community Respiration ◽  
Parallel Diffusion ◽  
Quality Control Technique

Stratified estuaries are home to expanding aquaculture activities whose ecological footprints can be observed through trends in microbial community respiration in the water column. Bottle incubations are widely used to measure water column community respiration in marine and freshwater ecosystems by measuring the flux of dissolved oxygen occurring in the bottle over a period of time. When in situ dissolved oxygen (DO) concentrations are markedly different than DO concentration of the incubation medium the potential for diffusion of oxygen across the bottle opening is great and may be especially pronounced in strongly stratified systems with relatively low rates of pelagic oxygen consumption. We incubated 60 Biochemical Oxygen Demand (BOD) bottles filled with sterilized water with DO concentrations ranging from 2.51 mg O2 L-1 to 10.03 mg O2 L-1 for 24 hours in a temperature controlled water bath. There was a significant relationship when DO flux was set as a function of initial DO (DO Flux = -0.0017x + 0.0085, r2 = 0.72, p < 2.2 e-16). DO fluxes ranged from -0.012 mg O2 L-1 hour-1 to 0.005 mg O2 L-1 hour-1 for bottles incubated with initial DO ranging from 10.03 mg O2 L-1 to 3.31 mg O2 L-1, respectively. These results suggest that diffusion across the ground glass seal of BOD bottles is possible and that extra precaution through parallel diffusion controls should be considered when measuring pelagic respiration using BOD bottle incubations in systems with relatively low or relatively high in situ DO concentrations.

scholarly journals Statistical approach for the retrieval of phytoplankton community structures from in situ fluorescence measurements

2016 ◽  
Vol 24 (21) ◽  
pp. 23635 ◽  
Author(s):  
Shengqiang Wang ◽  
Cong Xiao ◽  
Joji Ishizaka ◽  
Zhongfeng Qiu ◽  
Deyong Sun ◽  
...  
Keyword(s):  
Statistical Approach ◽  
Phytoplankton Community ◽  
Community Structures ◽  
Fluorescence Measurements

scholarly journals Estimates of New and Total Productivity in Central Long Island Sound from In Situ Measurements of Nitrate and Dissolved Oxygen

2012 ◽  
Vol 36 (1) ◽  
pp. 74-97 ◽  
Author(s):  
James R. Collins ◽  
Peter A. Raymond ◽  
W. Frank Bohlen ◽  
Mary M. Howard-Strobel
Keyword(s):  
Dissolved Oxygen ◽  
Long Island ◽  
Long Island Sound ◽  
In Situ Measurements ◽  
Total Productivity ◽  
Island Sound

Surface layer variability in the Ross Sea, Antarctica as assessed by in situ fluorescence measurements

2011 ◽  
Vol 88 (1-4) ◽  
pp. 28-45 ◽  
Author(s):  
Walker O. Smith ◽  
Vernon Asper ◽  
Sasha Tozzi ◽  
Xiao Liu ◽  
Sharon E. Stammerjohn
Keyword(s):  
Surface Layer ◽  
Ross Sea ◽  
Fluorescence Measurements

scholarly journals Comparative Resin Kinetics Using in Situ Fluorescence Measurements

2002 ◽  
Vol 4 (5) ◽  
pp. 540-540
Author(s):  
Daniel P. Walsh ◽  
Christopher Pang ◽  
Puja B. Parikh ◽  
Young-Soo Kim ◽  
Young-Tae Chang
Keyword(s):  
Fluorescence Measurements

scholarly journals Long-Term in Situ Oxidation of Biogenic Uraninite in an Alluvial Aquifer: Impact of Dissolved Oxygen and Calcium

2015 ◽  
Vol 49 (12) ◽  
pp. 7340-7347 ◽  
Author(s):  
Juan S. Lezama-Pacheco ◽  
José M. Cerrato ◽  
Harish Veeramani ◽  
Daniel S. Alessi ◽  
Elena Suvorova ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Alluvial Aquifer ◽  
In Situ Oxidation
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