Results 121 to 130 of about 550 (166)
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Spatial Variability in Palustrine Wetlands
Soil Science Society of America Journal, 2001Wetlands are complex ecosystems having considerable spatial variability. Understanding soil spatial relationships in wetlands is difficult because of the number of factors that affect soil properties. We established a nested sampling design within five small, forested and scrub‐shrub palustrine wetlands in Virginia to examine soil spatial variability ...
Stolt, M. H. +3 more
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Seasonal Transformations of Manganese in a Palustrine Emergent Wetland
Soil Science Society of America Journal, 2002Naturally occurring wetlands need to be investigated to assess their role in contaminant sequestration. Accordingly, aqueous‐ and solid‐phase analyses were conducted to monitor Mn response to changing physicochemical conditions within a Palustrine Emergent Wetland. A rhodochrosite‐like phase (MnCO 3
Matthew J. La Force +2 more
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Lacustrine and palustrine carbonate petrography: an overview
Journal of Paleolimnology, 2002Lacustrine limestones were formerly identified by their faunistic (limnea, planorbis) and floristic (Charophytes) content. For 30 years, indications of pedogenesis have been found in many lacustrine deposits, and consequently the concept of palustrine limestone was defined.
Pierre Freytet, Eric P. Verrecchia
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Growth Rates of American Alligators in Estuarine and Palustrine Wetlands in Louisiana
Estuaries and Coasts, 1991A comparative study of American alligator (Alligator mississippiensis) growth rates was made in estuarine and palustrine wetlands in southwestern Louisiana. In the estuarine wetlands, where characteristic salinity levels were ≤5%, alligators grew faster and therefore reached sexual maturity earlier than did those in palustrine wetlands, which are ...
Robert H Chabreck, Chabreck Robert H
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ChemInform Abstract: TOTAL SYNTHESIS OF (.+‐.)‐PALUSTRINE AND STRUCTURE REVISION
Chemischer Informationsdienst, 1985AbstractIn der im Formelschema angedeuteten Weise wird Palustrin" (IXb) hergestellt und frühere Strukturbestimmungen werden revidiert.
M. NATSUME, M. OGAWA
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Zur Kenntnis des Schachtelhalm‐Alkaloids Equisetin (Palustrin)
Chemische Berichte, 1955AbstractEs werden einige neue Befunde über das Schachtelhalm‐Alkaloid Equisetin (Palustrin) mitgeteilt: die Bildung eines Mononitrosamins, die Entstehung von Pyrrol bei der Zinkstaubdestillation, einige Oxydationsversuche und vorläufige Ergebnisse von Abbauversuchen mit starkem Alkali.
Werner Wöhlbier +2 more
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The Journal of Organic Chemistry, 1998
The stereoselective synthesis of (-)-methyl palustramate, a possible intermediate for the synthesis of (+)-palustrine, is described. The key step of the synthesis is a conformationally restricted Claisen rearrangement to afford the highly functionalized 1-benzylpipecolic ester 10.
Steven R., Angle, Robert M., Henry
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The stereoselective synthesis of (-)-methyl palustramate, a possible intermediate for the synthesis of (+)-palustrine, is described. The key step of the synthesis is a conformationally restricted Claisen rearrangement to afford the highly functionalized 1-benzylpipecolic ester 10.
Steven R., Angle, Robert M., Henry
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Journal of Asian Earth Sciences, 2011
Abstract A model is proposed for the development of the Quaternary palustrine carbonate–calcrete association, which occurs as hard crust capping low hills at a distal flood plain of Al Dibdibba alluvial fan located at southwestern Kuwait. Field occurrence, detailed petrographic investigation and geochemical analysis revealed that a single cycle of ...
Arafat Alshuaibi, Fikry I Khalaf
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Abstract A model is proposed for the development of the Quaternary palustrine carbonate–calcrete association, which occurs as hard crust capping low hills at a distal flood plain of Al Dibdibba alluvial fan located at southwestern Kuwait. Field occurrence, detailed petrographic investigation and geochemical analysis revealed that a single cycle of ...
Arafat Alshuaibi, Fikry I Khalaf
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Paleocene palustrine and ephemeral alluvial facies in southern Sardinia (Italy)
Italian Journal of Geosciences, 2015Paleocene ephemeral alluvial and palustrine deposits have been recognized in several small outcrops in southern Sardinia. Three sedimentary units have been distinguished: the basal one, mainly terrigenous, made up of alluvial pedogenized deposits, the intermediate one, entirely carbonate, made up of pedogenized fresh water deposits, and the third one ...
Murru, Marco +2 more
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Phosphate Removal Capacity of Palustrine Forested Wetlands and Adjacent Uplands in Virginia
Soil Science Society of America Journal, 1999We examined the ability of soils in six nontidal palustrine forested wetlands (PFOs) in Virginia's Piedmont (PD) and Coastal Plain (CP) to remove dissolved inorganic P from solution, and we compared the P sorption capacities of wetlands with those of streambanks (within wetlands) and ...
J. R. Axt, M. R. Walbridge
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