Discovery of cyanuric acid during an assessment of natural organic matter in stormflow water of the Santa Ana River, southern California, 2003-2004

We report carbon isotope abundances of dissolved inorganic carbon (DIC) in surface seawater collected from a time-series site off the Newport Beach Pier in Orange County, California. These data represent the first time series of Δ14C data for a coastal southern California site. From a suite of samples collected daily from 16 October to 11 November 2004, Δ14C values averaged 32.1 ± 4.4‰. Freshwater input from the Santa Ana River to our site caused Δ14C and δ13C values to decrease. Since this initial set of measurements, a time-series site has been maintained from November 2004 to the present. Surface seawater has been collected bimonthly and analyzed for Δ14C, δ13C, salinity, and ΣCO2 concentrations. Water samples from the Santa Ana River were collected during the wet season. California sea mussels and barnacle shells, ranging from 4 to 6 months old, were also collected and analyzed. Results from May 2005 to January 2008 show no long-term changes in δ13C DIC values. Δ14C DIC values over the 2005–2006 period averaged 33.7‰; high Δ14C values were observed sporadically (every 6–7 months), suggesting the presence of open water eddies at our site. Finally, in 2007, a stronger upwelling signal was apparent as indicated by correlations between Δ14C, salinity, and the Bakun index, suggesting that the Δ14C record is an indicator of upwelling in the Southern California Bight.

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The Cogged Stones of Southern California

American Antiquity ◽

10.2307/277402 ◽

1961 ◽

Vol 26 (3Part1) ◽

pp. 361-370 ◽

Cited By ~ 4

Author(s):

Hal Eberhart

Keyword(s):

Southern California ◽

River Valley ◽

Santa Ana ◽

Historical Significance ◽

Controlled Conditions ◽

Middle Period ◽

Ventura County ◽

Santa Ana River

AbstractCogged stones are one of the few classes of artifacts which are limited in occurrence to the “middle” period of southern California's prehistory. They are stone discs, 6⅛ inches or less in diameter, characterized by grooves or indentations in the edge. On the basis of the nature of the latter and of the presence or absence of perforation they are described in four types. Some of the variations may have historical significance, but this cannot be proven with the data at hand. Few specimens have been excavated under controlled conditions. The distribution is virtually limited to the coastal drainage south of Ventura County and appears to center along the Santa Ana River Valley. According to the interpretation of coastal chronology employed, cogged stones were made during the period 6000-3500 B.C. Their use is unknown, but the absence of any pattern of wear and the conjunctions of certain of the specimens suggest that they served some ritual function.

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Persistent Pacifism, Southern California Women, and the People’s Council of America, 1917–1918

Southern California Quarterly ◽

10.1525/ucpsocal.2015.97.4.362 ◽

2015 ◽

Vol 97 (4) ◽

pp. 362-398

Author(s):

Kathleen A. Brown

Keyword(s):

World War I ◽

Women Activists ◽

San Diego ◽

Southern California ◽

World War ◽

Santa Ana ◽

Diverse Backgrounds

Southern California women, through local chapters of the People’s Council of America for Democracy and Terms of Peace, actively resisted American involvement in World War I. Vilified, threatened, and refused meeting places and publicity, these women activists persisted in their cause. This article looks at women in the Santa Ana, San Diego, and Riverside chapters of the People’s Council and highlights their diverse backgrounds and their links to other progressive causes.

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Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

Agrokémia és Talajtan ◽

10.1556/agrokem.59.2010.1.12 ◽

2010 ◽

Vol 59 (1) ◽

pp. 99-108 ◽

Cited By ~ 3

Author(s):

M. Takács ◽

Gy. Füleky

Keyword(s):

Organic Matter ◽

Humic Acid ◽

Natural Organic Matter ◽

Extraction Methods ◽

Soil Samples ◽

Hot Water ◽

Soil Extracts ◽

Water Percolation ◽

Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

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