177,043 research outputs found
Effect of antimicrobial activity of Melaleuca alternifolia essential oil on antagonistic potential of Pleurotus species against Trichoderma harzianum in dual culture
No full textMelaleuca alternifolia (tea tree) essential oil was investigated for its "in vitro" ability to control Trichoderma harzianum, a fungal contaminant that causes extensive losses in the cultivation of Pleurotus species. The antifungal activity of M. alternifolia essential oil and antagonist activities between Pleurotus species against three T. harzianum strains were studied in dual-culture experiments on an agar-based medium in which different concentrations of essential oil were incorporated. M. alternifolia essential oil at a concentration of 0.625 μL/mL, inhibited T. harzianum mycelial growth by 5.9-9.0%, depending on the strain. At the same concentrations P. ferulae and P. nebrodensis stimulated mycelial growth by 5.2-8.1%. All strains of T. harzianum were antagonistic to the Pleurotus species in the control. When essential oil was added to the substrate cultural, the antagonistic activity of T. harzianum against the Pleurotus species was weak (0.0625 μL of essential oil) or non-existent (0.125 μL of essential oil). M. alternifolia essential oil could be an alternative to the synthetic chemicals that are currently used to prevent and control T. harzianum in mushroom cultivation. © 2007 Springer Science+Business Media B.V
Volatile compounds in different cultivars of Apium graveolens L.
No full textThe volatile compounds (VC) of 4 cultivars of Apium graveolens L. (cvs Sedano Nero di Trevi, D'Elne, Dorato d'Asti and Verde Pascal) were determined with HS-SPME and GC/MS. Eleven compounds were identified in cv Sedano Nero di Trevi, 17 compounds in cv D'Elne and 21 compounds in cv Verde Pascal. The main constituent of these cultivars was limonene. Twenty-one compounds were identified in cv Dorato d'Asti. The main constituent was gamma-terpinene. Sedano Nero di Trevi is different, compared with other cultivars, particularly for gamma-terpinene conten
Diagnostic of the conservation state in the crypt of the Abbey of Montecorona: Biological, microclimatic and geophysical evaluations
No full textThe Abbey S Salvatore of Montecorona, an important Benedictine monastary of the eleventh century, is placed at Umbertide, on the Northwest of Perugia (Italy). The site is in the Umbria region, characterized by a well-documented historical and instrumental seismicity, which periodically exposes this area to hazards with widespread damage for the population and the built-up environment. This paper focused on the study of the conservation state of the crypt of the Abbey. A multidisciplinary approach, using biological and physical non-destructive methods, is proposed. First, we investigated the microbial biodiversity of the crypt, analysing the presence of microorganisms by microscopic and cultivation methods. The second step was the study of the influence of the environment on the colonization and growth of these microorganisms, with a continuous monitoring of the microclimate inside the crypt, especially the thermo-hygrometric conditions. Moreover, with the aims of localizing the structures involved in the deterioration process, such as fractures, moisture, etc, ground penetrating radar (GPR) surveys, with different methodologies, were carried out in the crypt: reflection mode on the floor and traveltime tomography on the ceiling. From GPR data, a structure of archaeological interest was evidenced and, by means of a frequency signal analysis, the underground water content of the stone was also evaluated, assessing the correlation between the spectral content and moisture degree. The integration of information from these different methods provided some interesting results, also addressing possible interventions for protection and conservation of the crypt. © 2009 Nanjing Institute of Geophysical Prospecting
La narrazione di un dramma nella stampa nazionale: il terremoto del centro Italia
No full textHow did the Italian national press cover the earthquakes that struck severely the centre of Italy in 2016? How did it cover the tragedy of the people and territories hit by the earthquakes? What were the main practices put in place by journalists? An earthquake is a terrifying, unexpected and destructive event, characteristics that make it highly newsworthy: a perfect kind of news for its widely popular appeal. Journalists have the dif cult task of narrating such a tragic event, which requires a dedicated and “dramatic” frame as they must tell stories of death, pain and destruction caused by earthquakes. So, what are the main practices deployed by journalists, who are primarily eyewitnesses, in the narration of the drama? What are the main frames proposed (human interest, attribution of responsibility, economic consequences)? In Italy few studies have been conducted in this eld so far. This article aims to identify the kind of storytelling and frames that prevail in the repre- sentation of the earthquakes that took place in the centre of Italy. Emphasis is placed on the two earthquakes which registered the highest magnitudes: in Amatrice on 24 August 2016 and in Norcia on 30 October 2016. These two seismic events had different consequences, even though they were of similar magnitudes. This strongly in uenced, as will be seen, the kind of coverage newspapers dedicated to them. This study analyses all the articles devoted to the earthquakes that were published between 25 August 2016 (the day after the earthquake in Amatrice) and 9 April 2017 (covering a total of 33 weeks), by ve of the most widely read Italian national newspapers (Corriere della Sera, la Repubblica, il Giornale, La Stampa and Il Sole 24 Ore). In total, 5,904 news articles were collected. We then conducted computer-assisted content analysis using T-lab, a linguistic and statistical software for content analysis. The results con rm the increasingly evident emergence, in the chronicles of the earthquake, of human interest framing – namely the narration of strong personal emotional experiences – together with the economic effects of the earthquake (the eco- nomic consequences frame), and the debate regarding the institutional actors who were supposed to intervene in the narrated events (the attribution of responsibility frame)
Anti-inflammatory and analgesic effects of Spartium junceum L. flower extracts. A preliminary study
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Screening sull’origine botanica e sulla composizione chimica di cinque frazioni diversamente colorate di polline raccolto dalle api
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