Carbon and nitrogen content of marine pore waters

We have developed sampling methods and an analytical system to determine the concentration of dissolved organic C (DOC) in marine pore waters. Our analytical approach is a modification of recently developed high-temperature, Pt-catalyzed oxidation methods; it uses Chromatographic trapping of the DOC-derived CO2 followed by reduction to CH4 and flame ionization detection. Sampling experiments with nearshore sediments indicate that pore-water separation by whole-core squeezing causes artificially elevated DOC concentrations, while pore-water recovery by sectioning and centrifugation does not appear to introduce DOC artifacts. Results from a set of northwestern Atlantic continental slope cores suggest that net DOC production accounts for >50% of the organic C that is recycled at the sediment-water interface.

Tabaré de Juan Zorilla de San Martin : juicio critico /

Mode of access: Internet.

Cartas gauchas; descripción de las fiestas del centenario hecha por el gaucho argentino, Martin Oro, en seis cartas, en versos gauchos, dirigidas á su mujer, Benita Chaparro. Apéndice: La visión de la pampa. El recao. En la guitarra. Poesías del mismo autor.

Mode of access: Internet.

Marjorie Post age 2 yrs. March 15th 1889

On mat: D.H. Swartz, 600 Main Street, Fort Worth, Tex.