Marcelo L C Gonçalves

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Discriminant analysis was used to identify eggs of Capillaria spp. at specific level found in organic remains from an archaeological site in Patagonia, Argentina, dated of 6,540 +/- 110 years before present. In order to distinguish eggshell morphology 149 eggs were measured and grouped into four arbitrary subsets. The analysis used on egg width and length(More)
Voltammetric techniques (differential pulse polarography (DPP) and differential pulse anodic stripping voltammetry (DPASV)) were evaluated for their capability to distinguish, without prior separation of the solid phase (e.g. filtration, centrifugation), between dissolved and particulate concentrations of Zn(II), Pb(II) and Cu(II), and to measure the extent(More)
Voltammetric techniques [differential pulse polarography (DPP) and differential pulse anodic stripping voltammetry (DPASV)] have been used to determine, at various pH, conditional differential functions and average equilibrium constants of copper, zinc and lead with the bacteria Klebsiella pneumoniae and Methanosarcine, the alga Selenastrum capricornutum(More)
During the excavations of the XIX century Meadowlark cemetery (Manhattan, Kansas, US), samples of sediments were taken from around five skeletons, and analyzed to detect intestinal parasites. No helminth eggs were found, but immunological ELISA tests for Entamoeba histolytica were positive in three samples. The immunological techniques have been(More)
In this study, nine organic sediment samples from a medieval archaeological site at Pineuilh, France, were examined for Giardia intestinalis using two commercially available immunological kits [enzyme-linked immuno sorbent and immunofluorescence (IFA) assays]. Both techniques detected G. intestinalis in one sample, dated to 1,000 Anno Domini. This is the(More)
Intertidal sediments of Ria Formosa have been surveyed at different time scales. Pore water of short sediment cores was collected bimonthly at five stations, from May 1993 to June 1994, around low-tide. One location was studied intensively every 1.5 hour, during a 6-hour air-exposure period, and during 20 minutes (1, 5, 10 and 20 minutes) immediately after(More)
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