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Biomedical subjects

L De Florio

Publications and source records attributed to L De Florio.

At least 19 recordsLinked to original sources
PubMed2003

A new phosphate-selective sorbent for the Rem Nut process. Laboratory investigation and field experience at a medium size wastewater treatment plant.

P-control technologies for municipal wastewater are essentially based on "destructive" methods, that lead to formation of concentrated solid-phases (sludge), usually disposed-off in controlled landfills. Ion exchange, as a "non-destructive" technology, allows for selective removal and simultaneous recovery of pollutants, which can be recycled to the same and/or related productive lines. In this context, the REM NUT process removes nutrient species (HPO4 = , NH4+, K+) present in biologically oxidised municipal effluents and recovers them in the form of struvites (MgNH4PO4; MgKPO4), premium quality slow release fertilisers. The main limitation to the extensive application of this ion exchange based process is the non-availability of selective exchangers for specific removal of nutrient species. This paper illustrates laboratory investigation and pilot scale development of a so-called "P-driven" modified REM NUT scheme based on a new phosphate-selective sorbent developed at Lehigh University, PA, USA.

Adsorption↗
PubMed2001

Rem nut ion exchange plus struvite precipitation process.

Nutrients control technologies from wastewater are based on destructive technologies which defer the problem fromthe diluted liquid-phase (effluent) to a more concentrated waste (sludge) in the case of phosphates, or to nitrogen gas and/or volatile compounds in the case of ammonia. The REM NUT process allows for simultaneous removal of phosphate and ammonium ions by selective ion exchange and recovery by chemical precipitation in the form of struvite (magnesium ammonium phosphate) from the spent exchangers regeneration eluates. In the paper revised versions of the REM NUT process, i.e., P-driven layouts, are presented and cost effectiveness is compared to chemical precipitation based on the use of ferric chloride.

Chemical Precipitation↗
PubMed1999

[Dentinogenesis imperfecta. Scanning electron microscopic study and microanalysis].

BACKGROUND: Dentinogenesis imperfecta (DI) is an inherited dentine defect which affects both the primary and secondary dentitions. Shields et al. in 1973 suggested a classification of DI within three types: type I, associated with osteogenesis imperfecta (OI), type II and type III. Although the varying clinical, radiographic and histological findings in DI have been described in detail, an available method for closer examination of the abnormal dentine matrix, electron microscopy, has seldom been used. Scanning and transmission electron microscopy studies can help to understand the pathogenesis of the different types of heritable dentine defects and the diagnosis and classification of these diseases. The aim of the present study was to evaluate a case of DI using scanning electron microscopy and microanalysis. METHODS: Dentine was obtained from tooth samples from a fourteen-year-old boy affected by DI and from third molars extracted for therapeutic reasons used as controls. Samples were observed with a scanning electron microscope, scanning electron micrographs were evaluated with an image analysis program and specimens were finally observed with a scanning electron microscope equipped for micro-analysis. RESULTS AND CONCLUSIONS: The results obtained showed that the total number of dentinal tubules was significantly reduced and the presence of a dentine mineralization defect in the patient affected by DI, in comparison to the controls.

Adolescent↗
PubMed1982

[Echotomography of pathological masses of the mediastinum. Indications and limits].

The authors refer to the application of sonography in the evaluation of mediastinal masses. In this pathology, sonography is useful if neither air nor bone tissue are present between the transducer and the mass. Sector scans are obtained through the transgiugular line, the intercostal spaces, the hepatic and splenic windows, the sternal notch. The diagnostic value is due to the possibility to define the solid or liquid content of the investigated masses.

Diagnosis, Differential↗
PubMed1979

[Mammary focal scleroelastotic lesion (author's transl)].

Mammary focal scleroelastotic lesions are a newly recognized entity, with mammographic and macroscopic features simulating an infiltrating carcinoma but with benign microscopic features. The authors report two cases of this mammary lesion.

Adult↗