Search results for "AROMA"

showing 10 items of 1006 documents

Photochemistry of 1,2,4-oxadiazoles. A DFT study on photoinduced competitive rearrangements of 3-amino- and 3-N-methylamino-5-perfluoroalkyl-1,2,4-ox…

2006

The photoinduced competitive rearrangements of 5-perfluoroalkyl-3-amino(N-alkylamino)-1,2,4-oxadia- zoles have been investigated by DFT calculations and UV-vis spectroscopy. The observed product selectivity depends on the number of hydrogen atoms present in the amino moiety and involves two or three possible routes: (i) ring contraction-ring expansion (RCRE), (ii) internal-cyclization isomerization (ICI), or (iii) C(3)-N(2) migration-nucleophilic attack-cyclization (MNAC). UV absorption and fluorescence spectra of the reactants, and vertical excitation energy values, calculated by time dependent DFT, support the involvement of a neutral singlet excited state in the photoexcitation process. …

PhotochemistryUltraviolet RaysFluorescence spectrometryReaction intermediatePhotochemistryDENSITY-FUNCTIONAL THEORYSinglet stateHUMAN 5-HT1B RECEPTORBASIS-SETSOxadiazolesRING-PHOTOISOMERIZATIONMolecular StructureChemistryOrganic ChemistryEXPEDIENT ROUTETautomerTransition statePhotoexcitationMOLECULAR-ORBITAL METHODSModels ChemicalLUORINATED HETEROCYCLIC-COMPOUNDSAROMATICITY INDEXExcited state5-MEMBERED HETEROCYCLESEXCITATION-ENERGIESIsomerization
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A reactor for photoelectrocatalytic oxidation of aromatic alcohols

2008

Photoelectrocatalytic reactor Aromatic alcohols Selective oxidation
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Phthalate esters (PEAs) and Polycyclic Aromatic Hydrocarbons (PAHs) in indoor dust matter of Palermo (Italy) area. Extraction, GC-MS analysis

2012

Studies on indoor pollution are important since people spend more than 80% of their time indoor environments. A variety of air pollutants, associated with volatile semi-volatile and particulate matter, are generated in indoor environment from human activities. Among the hazardous pollutants polycyclic aromatic hydrocarbons (PAHs) are important owing to their carcinogenicity and mutagenicity. Phthalates are introduced into the environment by anthropogenic sources. Phthalates with higher molecular weights are largely used as additives and plasticizers in plastic material (PVC), while those with lower molecular weights are components of solvents, adhesive, wax, ink, pharmaceutical products, et…

Phthalate estersPhthalate esters Polycyclic Aromatic Hydrocarbonsindoor dustdustPolycyclic Aromatic HydrocarbonsindoorSettore CHIM/12 - Chimica Dell'Ambiente E Dei Beni Culturali
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Medicinal and Aromatic Plant Research in the 21st Century

2012

It has been estimated that 250,000 terrestrial plants contribute to biodiversity on earth. The chemodiversity of plants, however, may be considered to be much larger due to the vast number of phytochemical constituents with their wide range of bioactivity as seen in medicinal and aromatic plants. The present review focuses on the potential of medicinal and aromatic plants for medicinal, nutritional and other purposes, but highlights also possible toxicities. Quality control for standardization of herbal products as well as advancements in molecular biological techniques will foster the progress of medicinal and aromatic plant research in the years to come.

Phytochemicalbusiness.industryved/biologyfungiTerrestrial plantved/biology.organism_classification_rank.speciesAromatic plantsBiodiversityfood and beveragesMedicinePharmacologybusinessBiotechnologyMedicinal & Aromatic Plants
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Piante medicinali in Sicilia: un’opportunità di sviluppo tra tradizione e innovazione

2012

L’area del Mediterraneo, caratterizzata da una estrema variabilità di ambienti naturali e quindi da un elevato grado di biodiversità vegetale, possiede un grande numero di specie dotate di proprietà medicinali; in Sicilia, molte di queste fanno parte da tempi remotissimi della tradizione popolare, che tuttora ne fa largo uso per l’automedicazione erboristica e in terapia veterinaria. In epoca recente, la crescente tendenza dell’industria e dei consumatori verso l’utilizzazione di prodotti “naturali” ha aperto la strada verso l’uso di piante medicinali anche in settori di mercato che, fino a qualche tempo fa, erano dominati dai prodotti di sintesi. In tale contesto, ci si interroga su come f…

Piante aromatiche e medicinaliagrotecnicaambienti mediterraneiprodotti naturalipiante officinaliSettore AGR/02 - Agronomia E Coltivazioni Erbacee
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Prove di pacciamatura con materiali organici su Origano (Origanum heracleoticum L.)

2005

La coltivazione delle piante aromatiche e medicinali, particolarmente quando condotta con i metodi dell’agricoltura biologica, si configura oggi come una possibilità di estremo interesse per il rilancio produttivo di numerose aree interne a rischio di marginalizzazione. Tuttavia, ancora numerosi sono gli aspetti da mettere a punto riguardo all’inserimento delle p.o. negli ordinamenti colturali italiani e siciliani in particolare, ed essi riguardano soprattutto interventi tecnici volti all’abbassamento del rapporto costo/ricavo. la messa a punto per queste dell’agrotecnica più opportuna, in grado contemporaneamente di: a. consentire l’ottenimento di rese ottimali, sia sul piano della quantit…

Piante aromatiche e medicinaliagrotecnicapacciamatura organicaPiante aromatiche e medicinali; origano; agrotecnica; pacciamatura organicaoriganoSettore AGR/02 - Agronomia E Coltivazioni Erbacee
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La città e le erbe: Palermo tra aromi e spezie

2009

Piante aromatiche Piante medicinali SiciliaSettore AGR/02 - Agronomia E Coltivazioni Erbacee
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Le piante aromatiche in Sicilia

2012

Les plantes aromatiques sont toutes les espéces vegetales caractérisées par avoir des substances volatiles parfumées traditionnelement utilisées pour aromatiser les aliments ou les produits pharmaceutiques ou cosmétiques. Beaucoup des espéces aromatiques ont aussi des différentes propriétés spécifique (antioxydants, colorants, thérapeutique) qui les rendent attrayants pour de nombreux secteurs de l'industrie. La flore naturelle sicilienne se compose de plusieurs des espécés avec ces caractéristiques et leur culture sur de superficies moyen-large peuvent contribuer à la création de nouvelles sources de revenus supplémentaire pour des environnements marginaux. Dans ce but il faut affiner des …

Piante aromatiche aree mediterranee aree marginali coltivazioneSettore AGR/02 - Agronomia E Coltivazioni Erbacee
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Uso di alcuni estratti vegetali come bio-erbicidi

2014

Le infestanti competono con le piante coltivate per la luce, gli elementi nutritivi, l'acqua e lo spazio, e influenzano fortemente le produzioni agrarie sia sotto l'aspetto quantitativo che qualitativo. Normalmente le infestanti riescono ad assorbire e utilizzare l'acqua e gli elementi nutritivi più rapidamente ed efficacemente delle colture principali, accrescendosi più velocemente di queste, fino, talvolta, ad inibirne del tutto lo sviluppo. Nel corso del tempo, alcune infestanti hanno sviluppato meccanismi di resistenza agli erbicidi comunemente utilizzati. Questa acquisizione, unitamente alla necessità di reperire soluzioni al problema della gestione delle infestanti anche in condizioni…

Plant extracts Bio-herbicides Medicinal and Aromatic Plants Weed controlEstratti Vegetali Bio-erbicidi Piante Aromatiche e Medicinali Controllo delle InfestantiSettore AGR/02 - Agronomia E Coltivazioni Erbacee
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Groundwater of Sicily (Italy) Close to Landfill Sites: Quality and Human Health Risk Assessment

2021

Groundwater close to three municipal solid waste landfill sites in Sicily (southern Italy) was sampled to determine the presence of contaminants and the risk associated with its possible use as drinking and sanitary water. Polycyclic aromatic hydrocarbons, polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and metals were investigated. These target compounds are the most common pollutants present in leachates. Risk Assessment Guidance for Superfund (RAGS, US EPA) was used to assess human health risk. Ingestion, dermal, and total exposure to these xenobiotic contaminants in groundwater were evaluated, and the cancer and non-cancer risk indexes were c…

PollutantDioxin PCDD/FsHealth Toxicology and MutagenesisPublic Health Environmental and Occupational HealthSuperfundPollutionPolycyclic aromatic hydrocarbonschemistry.chemical_compoundchemistryPolychlorinated biphenylsEnvironmental quality standardEnvironmental healthDrinking water directiveEnvironmental scienceToxic elementsLeachateRisk assessmentXenobioticGroundwaterPolychlorinated dibenzofuransHuman health riskWater Science and Technology
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