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R Piazza

Publications and source records attributed to R Piazza.

At least 73 records · Page 4Linked to original sources
PubMedDate not supplied

Determination of polychlorobiphenyls in Venice Lagoon sediments.

Polychlorinated biphenyl (PCBs) congeners were measured in 14 sediment samples collected at five sites in the Venice Lagoon selected on the basis of a supposed diversity of inputs and of pollution levels. The PCBs were determined after a sonication assisted extraction by gas chromatography mass spectrometry (GCMS). The sum of the congener concentrations determined in the samples range from 4.05 to 239.15 ng/g on a dry weight basis. The concentration values are very variable both comparing the sites and comparing different samples from the same site and can be connected to the sand percentage in the sediment samples. The correlation matrix obtained from data matrix using the congener concentrations as variables shows high values, mostly between 0.964 and 1, suggesting that the pattern of the PCB congeners and the ratios among the concentrations in Venice Lagoon sediments are more or less constant; the samples differ only in the concentration level.

Environmental Monitoring↗
PubMedDate not supplied

A large left ventricular thrombus evolving towards canalization and mimicking a left ventricular pseudoaneurysm: an echocardiographic study.

We describe a case of a large apical left ventricular thrombus evolving towards canalization and showing echocardiographic features mimicking a left ventricular pseudoaneurysm. Only serial echocardiographic studies allowed an appreciation of the changing morphologic features of the apical structure, permitting differential diagnosis between a canalization of an evolving thrombus and a myocardial free-wall rupture with pseudoaneurysm formation.

Aged↗
PubMedDate not supplied

A quantitative test for chemosensitivity of short-term cultures of human lymphomas.

An in vitro chemosensitivity test is described for the quantitative determination of the interference of antitumoral drugs on nucleic acid metabolism in short-term cultures of non-Hodgkin's malignant lymphomas. Preliminary biochemical studies have defined the optimal culture conditions and have guaranteed the reliability and the reproducibility of the test. Our results for adriamycin and prednisone are in agreement with those obtained on experimental systems with other techniques.

Antineoplastic Agents↗