Search results for "GC"
showing 10 items of 606 documents
Volatile Constituents ofTeucrium poliumL. from Turkey
1998
Abstract The volatile constituents obtained from the aerial parts of Teucrium polium were analyzed by GC and GC/MS. The oil was found to contain 37 components, of which 30 were identified. The major constituents were β-pinene (18.0%), β-caryophyllene (17.8%), α-pinene (12.0%), caryophyllene oxide (10.0%), myrcene (6.8%) and germacrene-D (5.3%)
Chemical composition, antimicrobial and antioxidant activities of the essential oil of Italian Prangos trifida (Mill.) Herrnst. & Heyn
2022
In this work, the essential oil of the aerial parts of a not previously investigated accession of Prangos trifida (Mill.) Herrnst. & Heyn (Apiaceae), collected in Northern Italy, was analysed by GC/MS. Twenty-five compounds were identified, accounting for 91.30% of the total oil, which is characterised by a high content of monoterpene hydrocarbons (71.26%). The main constituents of the essential oil were cis-beta-ocimene (18.12%), alpha-phellandrene (12.14%), sylvestrene (11.32%), p-mentha-1,3,8-triene (9.56%) and alpha-pinene (8.85%). The essential oil of P. trifida showed a good antimicrobial activity directed above all against Gram-positive bacteria, and had an interesting antioxidan…
Sport e integrazione sociale. Il c.d. ius soli sportivo
2018
L'articolo esamina criticamente la disciplina di cui alla Legge 20 gennaio 2016, n. 12, che ha introdotto in Italia l'istituto comunemente denominato ius soli sportivo. L'analisi è condotta prendendo a riferimento sia la normativa di fonte statuale che quella di fonte federale, nazionale e internazionale.
An experimental, behavioral, and chemical analysis of food limitations in mutualistic Crematogaster ant symbionts inhabiting Macaranga host plants
2023
Obligate mutualistic plant-ants are often constrained by their plant partner's capacity to provide resources. However, despite this limitation, some ant partners actively reject potential prey items and instead drop them from the plant rather than consuming them, leaving the ants entirely reliant on host plant-provided food, including that provided indirectly by the symbiotic scale insects that ants tend inside the plants. This dependency potentially increases the efficiency of these ants in defending their host. We hypothesize that if this ant behavior was beneficial to the symbiosis, prey rejection by ants would be observed across multiple plant host species. We also hypothesize that plan…
The Aqua-Planet Experiment (APE): Response to Changed Meridional SST Profile
2013
This paper explores the sensitivity of Atmospheric General Circulation Model (AGCM) simulations to changes in the meridional distribution of sea surface temperature (SST). The simulations are for an aqua-planet, a water covered Earth with no land, orography or sea- ice and with specified zonally symmetric SST. Simulations from 14 AGCMs developed for Numerical Weather Prediction and climate applications are compared. Four experiments are performed to study the sensitivity to the meridional SST profile. These profiles range from one in which the SST gradient continues to the equator to one which is flat approaching the equator, all with the same maximum SST at the equator. The zonal mean circ…
tutela della concorrenza e professione forense
2015
lo studio approfondisce le problematiche sollevate dall'esercizio del professione forense nel mercato della concorrenza.
Impact flavor compounds in cooked rice cultivars from the Camargue area (France)
2010
International audience; Rice from two scented (Aychade, Fidji) and one nonscented (Ruille) cultivars from Camargue area (France) together with one Asian scented rice (Thai) were cooked and volatile compounds were extracted by dichloromethane/pentane (1;2, v/v) solvent mixture. 40 odorous compounds were noticed during GC-O analysis of the organic extracts, amongst which oct-1-en-3-one and 2-acetyl-1-pyrroline were altmost constantly perceived. Hierarchical cluster analysis (HCA) of perceived odours enabled to distinguish the groups of rice cultivars. 60 compounds were identified and quantified by GC-MS. New odour-active components of cooked rice were detected for the first time including oct…
Impact flavor compounds in cooked rice cultivars from Camargue area (France)
2008
International audience; Efforts have been undertaken for the last decades to promote the production of scented rice cultivars in Camargue, a traditional rice cultivation area in the south of France. Volatile compounds of cooked rice from two scented Camargue rice cultivars (Aychade and Fidji) were analysed and compared to that of a marketed Asian scented rice one (Thai)(1). Additionally volatile analysis from a cooked rice of a non-scented cultivar (Ruille) grown in Camargue was performed. (...)
Chemical Composition and Evaluation of Insecticidal Activity of Calendula incana subsp. maritima and Laserpitium siler subsp. siculum Essential Oils …
2022
The problems of the environment and human health related to the use of synthetic and broad-spectrum insecticides have increasingly motivated scientific research on different alternatives and among these, the use of green systems, such as essential oils, have been explored. Several species of the Apiaceae and Asteraceae families, aromatic herbs rich in secondary bioactive metabolites, are used in the industrial field for pharmaceutical, cosmetic, and food purposes. Different essential oils extracted from some species of these families have shown acute toxicity and attractive and/or repellent effects towards different insects. In our work, we investigated the toxic potential of Calendula inca…
Étude paléoenvironnementale et paléoclimatique multiproxiesdes bassins fini-carbonifères à permiens du N-E duMassif central.
2021
National audience; Les bassins intracontinentaux fini-carbonifères à permiens d'Autun et de Decize-LaMachine (NE du Massif central) ont fait l'objet d'un travail de thèse s'appuyant sur denombreuses méthodes d'analyse appliquées à haute résolution sur des données deforages et quelques coupes.Les interprétations des résultats sédimentologiques (faciès, diagraphies, sismique), destratigraphie séquentielle, de géochimie et isotopie organique (carbone et azote) et deminéralogie ont permis de reconstituer de la manière la plus précise possible l'évolutiondes environnements sédimentaires de ces bassins dans l'espace et au cours du temps.Il en ressort que les deux bassins étudiés dominés par des d…