42 research outputs found
Sediment storage at tidal inlets in northern Adriatic lagoons: ebb delta morphodynamics, conservation and sand use strategies.
No full textA geostatistical procedure for the assessment of sand storage potential at northern Adriatic inlets.
No full textLe riserve di sabbia: strategie di impiego di materiali di escavazione dalle vie marittime di accesso lagunare.
No full text
Development of an electrochemical ELISA for the screening of 17 beta-estradiol and application to bovine serum
No full textA sensitive electrochemical enzyme-linked immunosorbent assay (ELISA) for the detection of 17 beta-estradiol (17 beta-E(2)) was developed. Optimisation of two ELISA competition assays, using monoclonal or polyclonal antibodies anti-17 beta-estradiol, coupled with the electrochemical detection was firstly performed. The activity of the label enzyme (horseradish peroxidase) was measured electrochemically using 3,3',5,5'-tetramethylbenzidine as substrate. The use of the polyclonal antibody resulted in a more sensitive assay and the detection limit of the assay was estimated to be 20 pg ml(-1). The analytical performances of the method were compared to those obtained using a dissociation enhanced lanthanide fluorescence immunoassay (DELFIA). Although sample extraction is not usually required by DELFIA, both extracted and non extracted samples were assayed. The comparison between the two screening techniques revealed similar results for the extracted samples and showed a comparable precision (RSD%), ranging from 6.2 to 13.4 and from 6.7 to 14.3 for DELFIA and ELISA, respectively. The results obtained by these screening assays were confirmed by liquid chromatography atmospheric pressure chemical ionisation tandem mass spectrometry which is currently used to confirm illegal hormone administration for regulatory purposes. The electrochemical enzyme immunoassay appears suitable as a screening tool for routine analysis of bovine serum estradiol and can be extended to other anabolic hormones using appropriate antibodies.[...
A GIS-based multi-elemental procedure for coastal vulnerability and storm-risk assessment, Venice Province, Italy
No full text
DEVELOPMENT OF BIOGENIC AMINES DURING THE RIPENING OF ITALIAN DRY SAUSAGES
No full textThe effect of modification of different chemical and microbiological parameters and the production of biogenic amines (histamine, cadaverine, putrescine, and tyramine) was examined during ripening of various types of typical Italian dry sausages (salami). Water activity decreased from 0.97 to 0.87, and pH reached the lowest value between the 13th and the 20th day of the ripening period, and then increased. Putrescine (up to 122.7 mg/kg) and tyramine (up to 105.9 mg/kg) mean levels showed dominance in comparison with cadaverine (up to 26.1 mg/kg) and histamine (up to 6.2 mg/kg) mean values in all sausage types. The highest putrescine and tyramine concentrations were observed in salami with the largest diameters. This comparative study suggests a good correlation between microbial behavior and amine evolution, particularly tyramine and putrescine, in dry sausage production
