Study of Oxygen Transfer across Milk Proteins at an Air–Water Interface with Scanning Electrochemical Microscopy

2014 ◽  
Vol 62 (10) ◽  
pp. 2284-2288 ◽  
Author(s):  
Outi Toikkanen ◽  
Maija Lähteenmäki ◽  
Timo Moisio ◽  
Pirkko Forssell ◽  
Riitta Partanen ◽  
...  
Keyword(s):  
Oxygen Transfer ◽  
Milk Proteins ◽  
Scanning Electrochemical Microscopy ◽  
Water Interface ◽  
Air Water Interface ◽  
Electrochemical Microscopy

scholarly journals The beneficial role of rubble mound coastal structures on seawater oxygenation

2000 ◽  
Vol 18 (10) ◽  
pp. 1360-1371 ◽  
Author(s):  
E. I. Daniil ◽  
V. K. Tsoukala ◽  
C. I. Moutzouris
Keyword(s):  
Experimental Data ◽  
Oxygen Transfer ◽  
Initial Conditions ◽  
Oxygen Flux ◽  
Water Interface ◽  
Coastal Structures ◽  
Beneficial Role ◽  
Air Water Interface ◽  
Rubble Mound

Abstract. The beneficial role of rubble mound coastal structures on oxygenation under the effect of waves is discussed, based on analytical considerations and experimental data from laboratory experiments with permeable and impermeable structures. Significant oxygenation of the wave-protected area was observed as a result of horizontal transport through the permeable structure. A two-cell model describing the transport of dissolved oxygen (DO) near a rubble mound breakwater structure was developed and used for the determination of the oxygen transfer coefficients from the experimental data. Oxygen transfer through the air–water interface is considered a source term in the transport equation and the oxygen flux through the structure is taken into account. The mass transport equations for both sides of the structure are solved analytically in terms of time evolution of DO concentration. The behaviour of the solution is illustrated for three different characteristic cases of initial conditions. The oxygen transfer through the air-water interface in the wave-influenced area increases the DO content in the area; the resulting oxygen flux through the structure is discussed. The analytical results depend on the initial conditions, the oxygen transfer coefficient and the exchange flow rate through the structure. Experiments with impermeable structures show that air water oxygen transfer in the harbour area is negligible in the absence of waves. In addition the ratio of the horizontal DO flux to the vertical flux into the seaward side tends towards a constant value, independent of the initial conditions.Key words: Oceanography: physical (air-sea interactions; surface waves and tides)

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