Search results for "CN"
showing 10 items of 9699 documents
Preparation, Characterisation and Testing of Photocatalytic Polymeric Membranes with Entrapped or Suspended TiO2
2005
Various cellulose triacetate (CTA) or polysulfone (PSf) membranes with entrapped polycrystalline TiO2 were prepared by using different methods of the so-called phase inversion process. Porosity and permeability of the membranes increased by increasing the amount of entrapped TiO2 while rejection decreased. The photoactivity of entrapped TiO2 for the degradation of congo-red was compared with that of the same quantity of suspended TiO2 and the results indicated that TiO2 was always more efficient when used in suspension. A hybrid configuration consisting of a continuous membrane photoreactor with the photocatalyst in suspension showed to be the most promising one.
Photocatalytic Generation of H2 by Photoreforming of Organics in Aqueous Suspension of Nb2o5/C3n4 Composites
2023
Bare and composite materials based on C3N4 and Nb2O5 have been used as photocatalysts for the photoreforming of aqueous solutions of oxygenated compounds. Both Nb2O5 and Nb2O5/C3N4 composites have been prepared by hydrothermal synthesis and all of them were physical-chemically characterized. In this work two different carbon nitride species i.e. graphitic (g-C3N4) or thermo-etched (TE-C3N4) were used both alone or coupled with Nb2O5. The photo-reforming activity has been measured under UV irradiation by using the semiconductors in the presence of Pt as co-catalysts and, in the case of the best material, it was, for the first time, measured and compared also under natural solar irradiation. …
Modulation of Efficient Diiodo-BODIPY in vitro Phototoxicity to Cancer Cells by Carbon Nano-Onions
2020
Photodynamic therapy (PDT) is currently one of the most promising approaches for targeted cancer treatment. It is based on responses of vital physiological signals, namely reactive oxygen species (ROS), which are associated with diseased condition development, such as tumors. This study presents the synthesis, incorporation, and application of a diiodo-BODIPY based photosensitizer, based on a non-covalent functionalization of carbon nano-onions (CNOs). In vitro assays demonstrate that HeLa cells internalize the diiodo-BODIPY molecules, and their CNOs nanohybrids. Upon cell internalization and light exposure, the pyrene-diiodo-BODIPY molecules induce an increase of the ROS level of HeLa cell…
Sensory analysis integrated by palynological and physicochemical determinations plays a key role in differentiating unifloral honeys of similar botan…
2015
Summary Myrtaceae honeys produced in Sierra Morena (southern Spain, Andalusia) are obtained from both Eucalyptus camaldulensis and Myrtus communis, and honeys can be easily confused when classified as they come from the same botanical family. The characterisation was intended on the basis of their physicochemical, sensory and palynological properties. Cluster analysis (CA) and principal component analysis (PCA) allowed us to make a distinction between two honey profiles. The first one corresponds to the European sensory profile described for Eucalyptus unifloral honeys. The second profile, which sensory characteristics are absolutely different, has not been previously described. Classificat…
Sicily: regional planning without spatial plans
2012
Spatial planning in Italy has experienced significant processes of inno- vation in the last 15 years, due to the growing devolution of powers from the national level both in legislative and operational terms. The paper aims to reconstruct the evolution of regional planning in Sicily, a region of the Italian Mezzogiorno which has experienced significant autonomy in the field of urban and regional policy. Through a critical review of the planning experiences carried out by various sectors of the regional administration, the paper discusses some critical question in the relationship between urban planning and sectoral planning and the role of physical planning in address- ing the regional deve…
Smart strategic planning in multiethnic environments: Mazara del Vallo as a Mediterranean gateway city
2011
The paper offers a critical account of the strategic planning process carried out in Mazara del Vallo, a medium-sized Sicilian city whose development model has been characterised by the dominant role of the local fishery economy. From the 1970s onwards, the workforce employed in the fishery industry was mostly of North African origin (particularly Tunisian). In the past few years, rising economic and social processes have put into question the survival of the North African population in the city, the presence of which could be a strategic asset in light of the following future Euro-Mediterranean integration scenarios: (a) the deep crisis in the fishery sector, which is calling into question…
RICHIAMI DA MARTE. UNA SAPIENTE ORGANIZZAZIONE DEL TERRITORIO A SCALA PLANETARIA, NELLA PUBBLICISTICA OTTO-NOVECENTESCA
2012
L'articolo indaga nella letteratura scientifica e nella stampa divulgativa a cavallo tra XI e XX secolo quale sia stata la immaginazione della "pianificazione territoriale" del pianeta Marte, a partire dalle osservazioni di Schiaparelli e Lovell
LO STATO DELLA PIANIFICAZIONE NELLA PROVINCIA DI PALERMO
2022
Il contributo propone un'anilisi quali-quantitativa sullo stato della pianificazione urbanistica comunale nella provincia di Palermo alla luce del rinnovo dei riferimenti normativi regionali in materia di governo del territorio con l'approvazione della LR 19/2020
Utilizzo del pied de cuve fortificato per la fermentazione spontanea di vini rossi di qualità
2018
La fermentazione spontanea è un processo biologico incontrollato durante il quale molti lieviti e/o batteri potrebbero aumentare rapidamente in concentrazioni tali incidere negativamente sulla qualità del prodotto finale. A tal proposito, al fine di ottimizzare la crescita di lieviti con buone attitudini enologiche, si utilizza il metodo “pied de cuve”. Questa tecnica enologica è in grado di realizzare in una determinata massa di mosto dal volume ridotto, una fermentazione alcolica con un ceppo di lievito opportunamente inoculato o con ceppi di lieviti indigeni, naturalmente presenti nel mosto. Al fine di valorizzazione ed aumentare la diffusione di pratiche enologiche basate su un ridotto …
Compuestos bioactivos y capacidad antioxidante en zumos y extractos de residuos, obtenidos por ultrasonidos, de mandarinas híbridas
2022
Los cítricos son el cultivo más importante a nivel mundial. La elaboración de zumos genera grandes cantidades de residuos de fácil degradación, pero con alto contenido de compuestos bioactivos. La extracción asistida con ultrasonidos es uno de los métodos no-convencionales de extracción con resultados favorables. Durante la extracción son necesarios procesos de clean-up que favorezcan la purificación de los extractos para su mejor aprovechamiento. Además, la bibliografía indica que existe un mayor número de estudios con los de cítricos más conocidos, sin embargo, pocas investigaciones muestran resultados en mandarinas híbridas. Por todo ello el objetivo del presente trabajo es el estudio de…