Search results for "AROMA"
showing 10 items of 1006 documents
Inter-relazioni tra pools di C organico e gruppi funzionali della sostanza organica in un suolo a diversa gestione agronomica
2013
Lavorazioni del suolo e rotazioni colturali giocano un ruolo chiave nell’influenzare sia la quantità sia la qualità della sostanza organica del suolo (SOM). Mentre diversi studi sono stati condotti per valutare gli effetti di tali fattori agronomici sui pools di C organico, anche lungo i profili di suolo, pochi altri hanno investigato anche le relazioni tra i diversi pools di C organico e i gruppi funzionali della SOM. Obiettivi del presente lavoro sono stati quelli di i) valutare gli effetti della lavorazione del suolo e delle rotazioni colturali sui diversi pools di C organico e ii) di investigare le relazioni intercorrenti tra tali pools e i gruppi funzionali della SOM. I campioni di suo…
Influence of "single-origin" coffees on sensory characteristics of Espresso.
2004
Persistent Organic Pollutants and Fatty Acid Profile in a Typical Cheese from Extensive Farms: First Assessment of Human Exposure by Dietary Intake
2022
Dairy products represent an important source of beneficial substances for humans. At the same time, they can expose the consumers to environmental contaminants ingested by animals through their diet, influencing their health negatively. This experiment aims to evaluate the risk and benefits related to the consumption of typical stretched cheeses, considering their fatty acid (FA) profile and persistent organic pollutants (POPs) content. Six representative farms, two of them organic, raising Cinisara cattle were selected, considering the typical extensive management systems, based on feeding of natural pasture integrated with concentrate and hay depending on the availability of forage on pas…
Highly contaminated areas as sources of pollution for adjoining ecosystems: The case of Augusta Bay (Central Mediterranean).
2014
An assessment of trace element and polycyclic aromatic hydrocarbon (PAH) contamination based on surface sediments collected in summer 2012 was carried out in Priolo Bay adjoining one of the most polluted areas of the Mediterranean Sea, the industrial Augusta harbour (Italy, Central Mediterranean). Inorganic and organic contaminants were generally not remarkable. Occasional elevated concentrations of Hg, Cd, Ni and PAHs exceeding sediment quality guidelines were detected in the northern sector of Priolo Bay, close to Augusta harbour, possibly as a result of water drainage of industrialised and urbanised areas and/or potential direct export of contaminated material from Augusta harbour, whose…
CHEMICAL COMPOSITION OF THE ESSENTIAL OIL OF CLADANTHUS SCARIOSUS(ASTERACEAE) WILD GROWN IN MOROCCO
2014
Cladanthus Cass. [Syn. Ormenis (Cass.) Cass.] is a genus of the family Asteraceae, endemic to the Mediterranean region and related to the tribe Anthemideae (1). It comprises 15 species including C. scariosus (Ball) Oberpr. & Vogt [Bas. Santolina scariosa; Syn. Ormenis scariosa Litard. & Maire] from Morocco where is concentrates 1/3 of the species of the genus (2). Some of these are perennial, suffruticose and strongly aromatic plants. C. mixta (L.) Chev. is used in Morocco as chamomile and this is commonly called Moroccan chamomile. In the same country, C scariosus is fairly common in open places, on sandstone substrates (3) and is characterized by a strong aromatic character, this has moti…
Miscela binaria liquido ionico/[bmim][N3]: un mezzo efficace per la sintesi di arilazidi mediante SNAr
Nanoparticelle di Ag-poliamminoCD come catalizzatori per la riduzione di nitrocomposti aromatici
2014
Sistemi nanoparticellari di Argento protetti con poliammino-beta-ciclodestrine sono stati preparati, caratterizzati, e impiegati come catalizzatori per la riduzione con boroidruro di sodio di una serie di nitrocomposti aromatici modello 1-8. Tale reazione costituisce una interessante alternativa rispetto ai metodi di riduzione più comuni (LiAlH4, Zn/HCl), che prevedono l’uso di condizioni di reazione piuttosto drastiche. La cinetica della reazione considerata è stata approfonditamente studiata al fine di chiarire il ruolo meccanicistico del catalizzatore. E’ stato trovato, infatti, che il processo risulta di ordine misto rispetto al substrato, e che le costanti cinetiche apparenti di reazio…
Study of green Sicilian table olive fermentations through microbiological, chemical and sensory analyses.
2010
The production of five different green table olive cultivars was studied by a combined strategy consisting of chemical, microbiological and sensory analyses. Cultivable microflora of samples collected during processing was monitored by plate counts on seven synthetic culture media. In all samples Enterobacteriaceae, Pseudomonaceae, staphylococci, lactic acid bacteria and spore-forming bacteria were undetectable. Yeasts and moulds were countable from the day 42 (2 log CFU/ml) till the end of fermentation (6 log CFU/ml). The use of three different approaches for microorganism detection, including a culture-independent methodology, revealed the presence of barely three yeast species during the…
Selectivity of hydroxyl radical in the partial oxidation of aromatic compounds in heterogeneous photocatalysis
2007
Abstract The photocatalytic oxidation of different benzene derivatives has been investigated in order to understand how the substituent group affects the selectivity to hydroxylated compounds. Experimental runs were performed by using TiO2 (Merck) aqueous suspensions at natural pH irradiated by near-UV light. The organic molecules used as substrate contained an electron withdrawing group (EWG) (nitrobenzene, cyanobenzene, benzoic acid, 1-phenylethanone), an electron donor one (EDG) (phenol, phenylamine, N-phenylacetamide) or both an EWG and an EDG (4-chlorophenol). The results clearly indicated that the primary photocatalytic oxidation of aromatic compounds containing an EDG gives rise main…
Photocatalytic process intensification by coupling with pervaporation
2011
The integration of photocatalysis with a membrane separation process, in particular pervaporation, permits the recovery of valuable intermediate compounds (aromatic aldehydes) while they are produced avoiding their further degradation in the reactive ambient. In this way the yield and the conversion are enhanced. The coupling of the two processes is straightforward and the integration is complete even maintaining pervaporation and photocatalysis in two separate apparatuses provided that the process stream is continuously recycled at a sufficiently high flow rate. Additional advantages are: higher degree of purification of the aldehyde in the powder-free product stream, semicontinuous produc…