Search results for "Geta"

Banca del Germoplasma di Specie Spontanee (BGS-CT), Orto Botanico di Catania

2010

La Banca del Germoplasma delle specie spontanee dell’Orto Botanico dell’Università di Catania (BGS-CT) è stata realizzata con moderni criteri strutturali e strumentalia partire dal 2004. La Banca ha sede in locali appositamente dedicati nelle adiacenze dell’Orto Botanico e Dipartimento di Botanica nel pieno centro cittadino. L’attività principale è la conservazione ex situ dei semi di specie endemiche, rare e minacciate della flora siciliana, come pure di specie arboree e arbustive di interesse forestale. Con lo scopo di fornire un profilo attuale dell’istituzione, si riportano le informazioni relative alla struttura, al suo personale, alle metodologie impiegate e alle strumentazioni esiste…

Consumer Preference Heterogeneity Evaluation in Fruit and Vegetable Purchasing Decisions Using the Best–Worst Approach

2019

This study assesses consumer preferences during fruit and vegetable (FV) sales, considering the sociodemographic variables of individuals together with their choice of point of purchase. A choice experiment was conducted in two metropolitan areas in Northwest Italy. A total of 1170 consumers were interviewed at different FV purchase points (mass retail chains and open-air markets) using a paper questionnaire. The relative importance assigned by consumers to 12 fruit and vegetable product attributes, including both intrinsic and extrinsic quality cues, was assessed by using the best&ndash

Efficacy of microbial consortia and natural compounds as seed treatment for tomato pathogen management

2022

In this study the efficacy of experimental treatments based on microbial consortia (MC) (beneficial rhizobacteria and fungi, actinomycetes, arbuscular mycorrhizal fungi) and natural compounds (NCs) (chitosan and glucosinolates) as seed treatments for tomato bacterial and fungal pathogens management (Xanthomonas euvesicatoria pv. perforans, Xep; Pseudomonas syringae pv. tomato, Psto; Fusarium oxysporum f. sp. radicis-lycopersici, FORL) was evaluated. Independent trials were performed by using organic tomato seeds ‘San Marzano nano’. Treatments were performed by soaking seeds either in aqueous MC suspensions or NC dilutions. The direct effect on the seed inoculum was performed on seeds inocul…

Phytosociological characterization of the Celtis tournefortii subsp. aetnensis microwoods in Sicily

2014

A work on the Celtis tournefortii subsp. aetnensis vegetation, endemic species located in disjointed sites in the Sicilian inland, is here presented. It forms microwoods with a relict character established on screes and detrital coverages, on a variety of lithological substrates (volcanics, limestones, quartzarenites). Based on the phytosociological analysis carried out in the territory, these vegetation aspects are framed in the alliance Oleo-Ceratonion, within which a new association (Pistacio terebinthi-Celtidetum aetnensis) is described, in turn diversified in the following subassociations: a) typicum subass. nova, on detrital calcareous cones of the north-western part of Sicily, in the…

The ancient urban agroforestry systems of the Conca D'Oro (Palermo, Italy) need protection to defend the city

2019

The favorable environmental conditions together with the ancient agronomic practices, e.g. the irrigation systems introduced by the Arabs, have made the plain surrounding Palermo, known as Conca d’Oro, the unique agriculture landscape famous worldwide. Several tree and vegetable species have spread throughout in time but the new crops, instead of replacing the others, were often integrated exploiting the different heights of the tree canopies. The result was the creation of complex agroecosystems characterized by orchards with several layers of trees (as walnut, loquat, citrus) and empty spaces where the farmers cultivated vegetables. The grass fed the animals in the stables while manure wa…

Evolution expérimentale

2016

EA SPE GESTAD BIOME; L'évolution expérimentale consiste à tenter de mener en laboratoire le processus d’évolution afin d’en étudier les règles de fonctionnement sous-jacentes. Les sources de variation dans la réponse sont analysées au cours d’expériences exécutées et répliquées en conditions contrôlées. Cette approche dynamique de l’évolution complète les études habituelles analysant l’évolution a posteriori au moyen de méthodes comparatives ou en étudiant des fossiles. Elle constitue également un pont entre les études conduites dans les conditions naturelles et les simulations réalisées par modélisation mathématique.

Effects of Rosmarinus officinalis and Salvia officinalis essential oils on Tetranychus urticae Koch (Acari: Tetranychidae)

2013

Laboratory trials were carried out to characterize Rosmarinus officinal and Salvia officinalis essential oils and to evaluate their pesticidal activities against Tetranychus urticae. Slide-dip and leaf-disk bioassays were employed to study the mortality caused by these plant oils on two-spotted spiders. Different dilutions of both essential oils (0.10-0.25%, v/v) caused acute contact toxicity, although the sage extract showed greater acaricidal activity than rosemary oil. Mortality rates of 95-100% were observed at all the sage oil dosages and when rosemary emulsions contained at least 0.20% of essential oil. In the residual contact experiments (leaf-disk assays), 0.15-0.25% of sage oil or …

1993

Seven superimposed lithostratigraphic units have been distinguished in the Upper Trias of Los Pastores (Algeciras). The four lower units (1 to 4) show clayey-sandy-evaporitic Keuper facies. Pollen associations obtained from dark pelitic levels, and bivalves sampled from carbonate intercalations within these four lower units allow to date them as Carnian. These lower units can be correlated with the K1 to K3 units of the Keuper of the Subbetic and of other regions of the Iberian Peninsula. Concerning the three higher units, the unit 6 is pelitic-carbonatic and evaporitic and it also bears Carnian pollen associations. The units 5 and 7, however, are carbonatic and show clearly marine facies a…

The influence of high pressure processing on antimutagenic activities of fruit and vegetable juices

1997

Abstract In model experiments using the Salmonella/reversion assay (Ames test) and the carcinogen 2-amino-3-methyl-imidazo[4,5-f]quinoline (IQ), antimutagenic activities against IQ had been detected in about 70% of 62 fruit and vegetable species [Edenharder, Kurz, John, Burgard and Seeger (1994) Fd Chem. Toxic. 32, 443–459]. However, thermal stability of the antimutagenic factors varied considerably. As hydrostatic pressure is an alternative to heat in food processing and preservation, homogenates of 14 fruit and vegetable species were exposed to different pressures and temperatures. According to the response of the antimutagenic potential, three groups of produce could be identified: (a) m…

Holocene vegetation and fire dynamics in the supra-mediterranean belt of the Nebrodi Mountains (Sicily, Italy)

2012

High-resolution pollen, macrofossil and charcoal data, combined with accelerator mass spectrometry 14C dating and multivariate analysis, were used to reconstruct Holocene vegetation and fire dynamics at Urio Quattrocchi, a small lake in the supra-mediterranean belt in the Nebrodi Mountains of Sicily (Italy). The data suggest that after 10 000 cal a BP increasing moisture availability supported closed forests with deciduous (Quercus cerris, Fagus sylvatica and Fraxinus spp.) and evergreen (Quercus ilex) species. Species-rich closed forest persisted until 6850 cal a BP, when Neolithic activities caused a forest decline and affected plant diversity. Secondary forest with abundant Ilex aquifoli…