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PROPERTIES OF CALCAREOUS DEPOSITS FORMED ON METAL SURFACE IN SEA WATER UNDER CATHODIC PROTECTION AT DIFFERENT POTENTIALS AND CURRENT DENSITIES
Title
THE PROPERTIES OF CALCAREOUS DEPOSITS FORMED ON METAL SURFACE IN SEA WATER UNDER CATHODIC PROTECTION AT DIFFERENT POTENTIALS AND CURRENT DENSITIES.
Creator
Luo, Jiunn-Shyong, Florida Atlantic University, Lee, Rupert U., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
The influence of impressed current density and potential upon the nature of calcareous deposits formed . on a cathodic steel surface has been investigated. The experiments included potentiostatic, galvanostatic and mixed mode combined galvanostatic and potentiostatic techniques for affecting polarization. Specific attention was focused upon the thickness, morphology and composition of the deposits. A Mg 2+ depletion model has been developed as a possible explanation for the nucleation and...
Show moreThe influence of impressed current density and potential upon the nature of calcareous deposits formed . on a cathodic steel surface has been investigated. The experiments included potentiostatic, galvanostatic and mixed mode combined galvanostatic and potentiostatic techniques for affecting polarization. Specific attention was focused upon the thickness, morphology and composition of the deposits. A Mg 2+ depletion model has been developed as a possible explanation for the nucleation and growth behavior of calcareous deposits formed under combined mode operation.
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Date Issued
1987
PURL
http://purl.flvc.org/fcla/dt/14376
Subject Headings
Metals--Cathodic protection, Chemical oceanography, Calcium
Format
Document (PDF)
Elevated pCO2 effects on the macroalgal genus Halimeda: Potential roles of photophysiology and morphology
Title
Elevated pCO2 effects on the macroalgal genus Halimeda: Potential roles of photophysiology and morphology.
Creator
Peach, Katherine, Koch, Marguerite, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description
While ocean acidification (OA) is predicted to inhibit calcification in marine macroalgae, species whose photosynthesis is limited by current dissolved inorganic carbon (DIC) levels may benefit. Furthermore, variations in macroalgal morphology will likely give rise to a range of OA tolerance in calcifying macroalgae. One genus of calcifying macroalgae that has shown varying species’ tolerance to OA is Halimeda, a major carbonate sediment producer on tropical reefs. Species within this genus...
Show moreWhile ocean acidification (OA) is predicted to inhibit calcification in marine macroalgae, species whose photosynthesis is limited by current dissolved inorganic carbon (DIC) levels may benefit. Furthermore, variations in macroalgal morphology will likely give rise to a range of OA tolerance in calcifying macroalgae. One genus of calcifying macroalgae that has shown varying species’ tolerance to OA is Halimeda, a major carbonate sediment producer on tropical reefs. Species within this genus occupy a range of habitats within tropical environments (reefs and lagoons), illustrating their ability to adapt to diverse environmental conditions (e.g. carbonate chemistry, irradiance). To date it is not clear if morphological and photophysiological diversity in Halimeda will translate to different tolerances to OA conditions (elevated pCO2 and lower pH).
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Date Issued
2016
PURL
http://purl.flvc.org/fau/fd/FA00004621
Subject Headings
Coral reef ecology., Chemical oceanography., Halimeda., Environmental mapping., Plants--Effect of light on., Plant physiology., Photobiology., Carbon cycle (Biogeochemistry)
Format
Document (PDF)