Search results for "Amination"

Determination of organophosphate flame retardants in soil and fish using ultrasound-assisted extraction, solid-phase clean-up, and liquid chromatogra…

2017

A solid–liquid extraction method in combination with high‐performance liquid chromatography and tandem mass spectrometry was developed and optimized for extraction and analysis of organophosphorus flame retardants in soil and fish. Methanol was chosen as the optimum extraction solvent, not only in terms of extraction efficiency, but also for its broader analyte coverage. The subsequent clean‐up by solid‐phase extraction is required to eliminate matrix coextractives and reduce matrix effects. Recoveries of the optimized method were 50–121% for soil and 47–123% for biota, both with high precision (RSDs <12% in soil and <23% in biota). The method limits of detection ranged from 0.06 to 0.20 ng…

L’altro e le sue immagini. Note sul soliloquio

2016

The paper examines the soliloquy activity by means of some conceptual artifacts borrowed from three research programs: 1) the Enunciative Narratology of René Rivara; 2) the Theory of Predicative and Enunciative Operations of Antoine Culioli; 3) the Dialogical Syntax of John Du Bois. It is composed by three parts. In the first one, we discuss some definitions of soliloquy. The second part is devoted to the analysis of some aspects of such activity with particular reference to some language operations: a) laminations of voice; b) construction of the (interior) co-enunciator. Finally, in the last part we examine some questions that remain open in the debate on soliloquy activity.

Solvent-Induced Delamination of a Multifunctional Two Dimensional Coordination Polymer

2012

A coordination polymer is fully exfoliated by solvent-assisted interaction only. The soft-delamination process results from the structure of the starting material, which shows a layered structure with weak layer-to-layer interactions and cavities with the ability to locate several solvents in an unselective way. These results represent a significant step forward towards the production of structurally designed one-molecule thick 2D materials with tailored physico-chemical properties.

Solvent-Induced Delamination of a Multifunctional Two Dimensional Coordination Polymer (Adv. Mater. 15/2013)

2013

Current trends in solid-phase-based extraction techniques for the determination of pesticides in food and environment

2006

Solid-phase extraction (SPE) procedures for pesticide residues in food and environment are reviewed and discussed. The use of these procedures, which include several approaches such as: matrix solid-phase dispersion (MSPD), solid-phase micro-extraction (SPME) and stir-bar sorptive extraction (SBSE), represents an opportunity to reduce analysis time, solvent consumption, and overall cost. SPE techniques differ from solvent extraction depending on the interactions between a sorbent and the pesticide. This interaction may be specific for a particular pesticide, as in the interaction with an immunosorbent, or non-specific, as in the way a number of different pesticides are adsorbed on apolar or…

Pesticide analysis in coffee leaves using a quick, easy, cheap, effective, rugged and safe approach and liquid chromatography tandem mass spectrometr…

2017

An analytical method using a quick, easy, cheap, effective, rugged and safe (QuEChERS) procedure for multi-residue determination of 52 pesticides in coffee leaf extractshas been developed and validated according to SANTE/11945/2015 guidelines. Different sorbent combinations for dispersive solid phase extraction (d-SPE) clean-up as well as dispersive liquid-liquid microextraction (DLLME) were tested. The relative standard deviations (RSDs) for the recovery of 87-94% of pesticides added to coffee leaf extracts,was ≤20% for samples spiked at concentrations up to 50ng*g-1 depending on the clean-up procedures. However, samples spiked with a 100ng*g-1 pesticide mixture gave RSDs>20% for most pest…

Automatic screening of cardiac disorders using wavelet analysis of heart sound

2017

Body auscultation is a dominant method for physical examination of human heart using conventional stethoscope. This clinical method is non invasive and efficient but it requires a medical expert to interpret the heart sound for assessment of cardiac disorders. This paper presents analysis of heart sounds in wavelet domain for automated screening of cardiac disorders. Heart sound signal is transformed in wavelet domain to find out discrimination between heart sounds recorded from healthy and anomalous patients. Discriminatory features extracted from wavelet coefficients of heart sound are subjected to machine learning for screening of cardiac disorders automatically. The proposed method for …

Sustainable soy protein microsponges for efficient removal of lead (II) from aqueous environments

2023

Protein-based materials recently emerged as good candidates for water cleaning applications, due to the large availability of the constituent material, their biocompatibility and the ease of preparation. In this work, new adsorbent biomaterials were created from Soy Protein Isolate (SPI) in aqueous solution using a simple environmentally friendly procedure. Protein microsponge-like structures were produced and characterized by means of spectroscopy and fluorescence microscopy methods. The efficiency of these structures in removing Pb2+ ions from aqueous solutions was evaluated by investigating the adsorption mechanisms. The molecular structure and, consequently, the physico-chemical propert…

Spaces of cultural contamination. Creative places of sociality, integration, inclusion

2023

The well-being of the person is closely linked to the spaces in which they live and the resources they access. The recent slogan and urban paradigm "happy city and healthy city" bring attention back to the person and investigates the role of the built environment, individual, social and cultural well-being, as indicated in the sustainable development objectives of the 2030 Agenda. However, combining the city with the health and well-being of citizens requires an overall vision. It is necessary to graft a plot that can create - through resilient planning - interconnected and engaging open spaces, open and multiform specialized areas and, at the same time, incorporate pre-existing places and …

Mycotoxin Identification and In Silico Toxicity Assessment Prediction in Atlantic Salmon

2020

The present study aimed to identify mycotoxins in edible tissues of Atlantic salmon (Salmo salar) using liquid chromatography coupled to hybrid quadrupole time-of-flight mass spectrometry (LC-Q-TOF-MS). After using a non-targeted screening approach and a home-made spectral library, 233 mycotoxins were analyzed. Moreover, the occurrence of mycotoxins in fish filets was evaluated, and their potential toxicity was predicted by in silico methods. According to the obtained results, forty mycotoxins were identified in analyzed salmon samples, the predominant mycotoxins being enniatins (also rugulosin and 17 ophiobolins), commonly found in cereals and their by-products. Thus, mycotoxin carry-over …