scholarly journals Method Development for Determining the Removal of Metals from the Water Column under Transformation/Dissolution Conditions for Chronic Hazard Classification

2019 ◽  
Vol 38 (9) ◽  
pp. 2032-2042 ◽  
Author(s):  
Philippa Huntsman ◽  
Robert Beaudoin ◽  
Kevin J. Rader ◽  
Richard F. Carbonaro ◽  
G. Allen Burton ◽  
...  
Keyword(s):  
Water Column ◽  
Method Development ◽  
Hazard Classification

A novel marine phosphorus record from Lower Jurassic belemnites?

2021 ◽  
Author(s):  
Ailsa Roper ◽  
Clemens Ullmann ◽  
Crispin Little ◽  
Simon Poulton ◽  
Paul Wignall ◽  
...  
Keyword(s):  
Water Column ◽  
Mass Extinction ◽  
Large Scale ◽  
Method Development ◽  
Temporal Variations ◽  
Lower Jurassic ◽  
Phosphorus Concentration ◽  
Species Variation ◽  
Geophysical Research ◽  
The Impact

<p>Studying the long-term evolution of nutrient cycles and their interaction with other biogeochemical cycles is essential to understand Earth’s history. Marine nutrient cycling forms a key control on the cycling of carbon and oxygen in the bio- and geospheres. Here, we focus on phosphorus, which is the ultimate limiting nutrient on geological timescales and a potential driver of past intervals of marine anoxia/euxinia. Despite its importance, obtaining direct information on spatial and temporal variations in marine phosphorus concentrations has proved challenging. Recent work has demonstrated the potential for calcium carbonate-associated phosphorus in corals to record water-column phosphorus (e.g., LaVigne et al., 2008; 2010). Building on this approach, we are investigating the use of other calcitic fossils as a proxy for water column phosphorus concentration, focussing on belemnites, an extinct group of nektic molluscs.</p><p>We have developed and optimised a method to quantify phosphorus in the belemnite rostrum, and initially applied this method to samples from the upper Sinemurian to the Toarcian in the Lower Jurassic. During this time there were major climatic and environmental events in the latest Pliensbachian and early Toarcian, which are thought to have been driven by large scale volcanism of the Karoo-Ferrar Large Igneous Provinces (LIP). Of particular interest are an icehouse event during the Pliensbachian, and a warming event during the Toarcian which coincided with widespread ocean anoxia (the Toarcian Ocean Anoxic Event [TOAE]) and a second order mass extinction event (the Early Toarcian Mass Extinction).</p><p>We will present P/Ca results from method development tests and collections of belemnites from the Sinemurian to the Toarcian from a number of sites in the European Epicontinental Sea (EES). Pilot data show similar trends in belemnite phosphorus concentrations at different sites in the EES, including a sharp peak during the TOAE. We will also discuss the impact of inter-species variation on belemnite phosphorus concentrations, as well as internal variability in phosphorus concentrations in individual belemnites, to determine the potential impact of these variables on the reconstruction of water column phosphorus concentrations. </p><p>LaVigne, M., Field, M. P., Anagnostou, E., Grottoli, A. G., Wellington, G. M., Sherrell, R. M. (2008). Skeletal P/Ca tracks upwelling in Gulf of Panamá coral: Evidence for a new seawater phosphate proxy. Geophysical Research Letters 35.</p><p>LaVigne, M., Matthews, K. A., Grottoli, A. G., Cobb, K. M., Anagnostou, E., Cabioch, G., Sherrell, R. M. (2010). Coral skeleton P/Ca proxy for seawater phosphate: Multi-colony calibration with a contemporaneous seawater phosphate record. Geochimica et Cosmochimica Acta 74: 1282–1293.</p>

scholarly journals Weight‐of‐Evidence Approach for Assessing Removal of Metals from the Water Column for Chronic Environmental Hazard Classification

2019 ◽  
Vol 38 (9) ◽  
pp. 1839-1849 ◽  
Author(s):  
G. Allen Burton ◽  
Michelle L. Hudson ◽  
Philippa Huntsman ◽  
Richard F. Carbonaro ◽  
Kevin J. Rader ◽  
...  
Keyword(s):  
Water Column ◽  
Environmental Hazard ◽  
Weight Of Evidence ◽  
Hazard Classification

The water-column chemical signature after the 1998 eruption of Axial Volcano

1999 ◽  
Vol 26 (24) ◽  
pp. 3645-3648 ◽  
Author(s):  
Joseph A. Resing
Keyword(s):  
Water Column ◽  
Chemical Signature ◽  
Axial Volcano

Method development and optimization for isoflavone quantification in dry soy extract containing products

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
D Csupor ◽  
J Bognár ◽  
J Karsai ◽  
J Hohmann
Keyword(s):  
Method Development

Method Development and Analysis of Anthocyanins from Acai (Euterpe oleracea Mart.) Berries and Dietary Supplements using HPTLC

Planta Medica ◽  
2011 ◽  
Vol 77 (05) ◽  
Author(s):  
CS Rumalla ◽  
B Avula ◽  
YH Wang ◽  
TJ Smillie ◽  
IA Khan
Keyword(s):  
Dietary Supplements ◽  
Method Development ◽  
Euterpe Oleracea ◽  
Euterpe Oleracea Mart

Method development and validation for optimized separation of the major polyphenolics in propolis extracts using GC-MS method

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
K Siemionow ◽  
M Tomczyk ◽  
U Czyzewska ◽  
W Miltyk
Keyword(s):  
Method Development ◽  
Method Development And Validation ◽  
Development And Validation

HPTLC and TLC method development preliminary studies for damask rose

2017 ◽  
Author(s):  
T Agar Osman ◽  
A Gokbulut ◽  
O Demirezer Lutfiye
Keyword(s):  
Method Development ◽  
Damask Rose

Quantitative method development for measurement of Maesa lanceolata saponins by LC-MS

Planta Medica ◽  
2006 ◽  
Vol 72 (11) ◽  
Author(s):  
L Pieters ◽  
M Theunis ◽  
S Apers ◽  
A Vlietinck
Keyword(s):  
Quantitative Method ◽  
Method Development
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