Growth of Mg-Fe Layered Double Hydroxides (LDH) Film on Titanium Dental Implant Substrates for pH... more Growth of Mg-Fe Layered Double Hydroxides (LDH) Film on Titanium Dental Implant Substrates for pH Regulation in Oral Environments.
Worldwide great concern has recently arisen about pollution by Microplastics (MPs) as a new major... more Worldwide great concern has recently arisen about pollution by Microplastics (MPs) as a new major and ubiquitous hazard for human health and ecosystems with undetermined, yet potentially dangerous effects. However, despite a great research effort, the methods for quantitative identification still rely on long and subjective visual counting procedures carried out on optical microscopes by skilled human operators. In this study, a new automatic, portable, low-cost, and fast method for the quantitative detection of MPs in water is presented. Based on a modified optical scheme of a confocal microscope, the system automatically processes and counts the fluorescence pulses emitted by dye-stained MPs in flowing liquids after excitation with a low-power laser beam. Absolute calibration and tests to determine particle counts as a function of the flow rate were performed with commercial fluorescent 10-μm polystyrene microbeads. The particle count was found to increase linearly as a function of the flow rate up to a value of 600 ml/h. Real sample measurements were performed on three different types of commercial bottled water samples. The result were in good agreement with microscope observations. Therefore, the present investigation demonstrated the proof of concept of a methodology for quick automated counting of MPs in water.
We present the direct and one-step Rieche formylation of carbon nanotubes (CNTs) as the most effe... more We present the direct and one-step Rieche formylation of carbon nanotubes (CNTs) as the most effective (4.00 mmol g À1) functionalization route via formylation. Indeed, classical methods, i.e. three-step protocols based on CNT oxidation-reduction-partial oxidation (COOH [ CH 2 OH [ CHO), were revealed as less effective and more troublesome. All CNT-CHO products were comprehensively analysed by cross-verified potentiometric titration, scanning electron microscopy (SEM), thermogravimetry (TGA), Fourier transform infrared spectroscopy (FT-IR) and Raman spectroscopy.
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Microplastics (MPs) have recently been acknowledged as a new major and ubiquitous environmental p... more Microplastics (MPs) have recently been acknowledged as a new major and ubiquitous environmental pollutant with still unclear, yet potentially high, risks for different ecosystems and human health. Nevertheless, quantitative identification protocols rely on long and subjective visual counting necessarily performed on microscopes by well-trained operators. In this study, an automatic, fast, portable, and inexpensive method for the quantitative detection of MPs in water is proposed. The system is based on the typical optical setup of a fluorescence confocal microscope specifically adapted to automatically count dye-stained MPs in flowing liquids using a low-power laser beam. The fluorescence pulses emitted by flowing MPs are revealed and processed by a specific software using a pattern recognition algorithm to discriminate and count real fluorescence pulses out of noise fluctuations. The system was calibrated with commercial orange fluorescent 10 µm and 1 µm polystyrene microspheres, a...
Microplastics (MPs) have recently been acknowledged as a new major and ubiquitous environmental p... more Microplastics (MPs) have recently been acknowledged as a new major and ubiquitous environmental pollutant with still unclear, yet potentially high, risks for different ecosystems and human health. Nevertheless, quantitative identification protocols rely on long and subjective visual counting necessarily performed on microscopes by well-trained operators. In this study, an automatic, fast, portable, and inexpensive method for the quantitative detection of MPs in water is proposed. The system is based on the typical optical setup of a fluorescence confocal microscope specifically adapted to automatically count dye-stained MPs in flowing liquids using a low-power laser beam. The fluorescence pulses emitted by flowing MPs are revealed and processed by a specific software using a pattern recognition algorithm to discriminate and count real fluorescence pulses out of noise fluctuations. The system was calibrated with commercial orange fluorescent 10 µm and 1 µm polystyrene microspheres, and remarkable agreement with theoretical predictions was obtained regarding different parameters. Tests were also performed with laboratory-prepared MPs dispersed in different types of real water samples. In this case, the agreement with theory was slightly worse and differences found in the quantitative results require further investigation. However, the present study demonstrated the proof of concept of a method for quick automated MP counting in water.
Microplastics (MPs) have recently emerged as a new major and ubiquitous environmental pollutant w... more Microplastics (MPs) have recently emerged as a new major and ubiquitous environmental pollutant with still undefined, yet potentially high risks for human health and ecosystems. This has prompted growing public concern along with an increasing number of scientific studies. In particular, recent research has highlighted the need for a standardized methodology to monitor microplastics in different media, particularly in water. This study reports on the use of a new particle counter for the quantitative detection of MPs in water samples based on real-time analysis of fluorescence emissions. The instrument was calibrated using two types of plastic particles, i.e., polyvinyl chloride and high-density polyethylene, selected as examples of high- and low-density plastics, respectively. Specific solvents were used to match the different plastic densities. Measurements were also carried out on particles obtained from wastewater samples collected at the inlet and outlet of specific units of a ...
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
We present the direct and one-step Rieche formylation of carbon nanotubes (CNTs) as the most effe... more We present the direct and one-step Rieche formylation of carbon nanotubes (CNTs) as the most effective (4.00 mmol g−1) functionalization route via formylation.
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