170,384 research outputs found
"Uno strumento per la valutazione"
No full textin "Indicatori per il paesaggio" (a cura di Peano A., Cassatella C.
Extending Peano derivatives
No full textsummary:Let be a closed set, a positive integer and a function defined on so that the -th Peano derivative relative to exists. The major result of this paper is that if has finite Denjoy index, then has an extension, , to which is times Peano differentiable on with on for
A survey on C 1,1 fuctions: theory, numerical methods and applications
No full textIn this paper we survey some notions of generalized derivative for C 1,1 functions. Furthermore some optimality conditions and numerical methods for nonlinear minimization problems involving C1,1 data are studied.
Post-harvest Industrial Processes of Almond (Prunus dulcis L. Mill) in Sicily Influence the Nutraceutical Properties of By-Products at Harvest and During Storage
No full textAlmond cultivation in Sicily is experiencing a phase of great interest which is mainly concentrated in the development of specialized orchards, with irrigation and by adopting cultivars with high qualitative and quantitative performances. These are mostly Mediterranean genotypes with high fat content and hard or semi-hard shell, extremely different from the varieties of Californian diffusion. The development of the sector comprises the primary production of almonds but also a series of secondary products which often represent a burden for the company. From these considerations several researches have been developed with the aim of giving a value to these by-products through circular economy paths. One of the by-products widely produced, besides the shell, is the skin which covers the seed and is produced during the peeling phase. It is well-known that tegument is an important component of almond because it contains important bioactive substances (phenols and aromas) which are usually dispersed during peeling. This paper examined three different Italian cultivars widely spread in Sicily, two of Apulian origin, (Genco and Tuono), and one locally cultivated variety (Vinci a tutti). These three cultivars occupy an increasingly large area and are very popular with consumers and industry. The production of secondary products, therefore, evidences significant quantities and the possibility to give them an added value becomes a need for the sector. Therefore, the content of phenols and proanthocyanins in the skin at harvest and during storage was analyzed, adopting two different separation methods, with and without water. During the analysis it was possible to observe the different behavior of the three cultivars due to genetic and industrial factors. Skin separated without using hot water showed a higher total phenolic presence with average increases of about 20%, and with even higher increases, between 28 and 32%, for proanthocyanins. Vinci a tutti evidenced the highest total phenolic content after 8 months of storing while roasting has revealed to be a more effective skin separation approach
Dall'eredità grassmanniana alla teoria delle omografie nella scuola di Peano
No full textIn questo lavoro presentiamo una ricostruzione ed un’analisi storica del processo teorico che nell’ambito della scuola di Peano portò dall’eredità grassmanniana al calcolo vettoriale e alla teoria delle omografie. Il nostro obiettivo è anche tentare di dare una generalizzazione delle idee basilari introdotte da Peano (e da H.Grassmann). Inoltre analizziamo le applicazioni del calcolo geometrico Peano alle dimostrazioni di fondamentali teoremi di geometria proiettiva. Infine viene esaminata analiticamente un’importante applicazione fisico matematica di Roberto Marcolongo della teoria delle omografie per quanto riguarda le trasformazioni di Lorentz
Il Microbiota delle piante, ovvero le piante hanno bisogno dei microrganismi
No full textLe relazioni tra le piante e i fattori ambientali (il clima, i nutrienti, l’acqua, la composizione del suolo, etc) sono da tempo ampiamente studiate. Resta invece ancora molto da capire sul ruolo che la componente biologica del suolo (ci sono oltre cento milioni di cellule microbiche in un grammo di suolo!) ha sullo sviluppo e la salute delle piante.
Nella rizosfera soprattutto (la porzione di suolo influenzata dalla presenza di radici), gli essudati radicali favoriscono lo sviluppo di microrganismi (batteri, funghi, protozoi, virus) che interagiscono con le radici e con il suolo nell’influenzare i processi di trasformazione ed assorbimento dei nutrienti, la crescita della pianta e le infezioni da parte di microrganismi patogeni. L’interazione suolo-pianta non è quindi diretta ma mediata dalla presenza di microrganismi che con la loro attività metabolica modulano lo sviluppo dei semi e la crescita della plantula, modificano la morfologia delle radici, interagiscono con la fisiologia e la biochimica della pianta e influenzano la disponibilità e l’assorbimento dei nutrienti
The non-coincidence of ordinary and Peano derivatives
No full textsummary:Let be times differentiable in both the usual (iterative) and Peano senses. We investigate when the usual derivatives and the corresponding Peano derivatives are different and the nature of the set where they are different
Escaping the exception: Migrant sex workers between subjectification and excess
No full textThe paper examines the play of multiple, displacing and emplacing regimes of subjectification as they impinge upon the life experiences of migrant Nigerian sex workers, as well as the ways in which the women's subjectivities might exceed such regimes. Dispositifs such as those of migration policy and humanitarianism, of precariousness and institutionalised predation in neoliberal economies, but also of gender and kinship, interweave through complex genealogies that do not yield unequivocal victim-subjects or, on the contrary, subjects enforcing exploitation from a position of power. Likewise, neither mobility nor stasis, or border crossings and settled lives are straightforwardly mappable on excess or constraint: migration and return are experienced ambiguously, alternatively as liberating and constraining
Quality indicators for modified atmosphere packaging (MAP) storage of high-quality european plum (Prunus domestica L.) cultivars
No full textThe use of quality indicators is crucial in selling plums in more distant markets and the evaluation of freshness through multiple index is fundamental to evaluate the goodness of the storage technique. In this study we evaluated the quality of two european plums cultivars ('Ramasin' and 'Ariddo di Core' with purple and yellow flesh colour respectively) after modified atmosphere packaging (MAP) storage, through the selection of the most appropriate indicators. The headspace gas composition, the flesh fruit firmness (FFF), the soluble solid content (SSC), the titratable acidity (TA), the colour and the chlorophyll content of plums wrapped with 5 different films (F1, F2, F3, F4 and F5) were evaluated for up 21 days of storage (at 1±1°C and 90-95% relative humidity). For both cultivars, the multilayered films (F1 and F2, 90 and 65 μm respectively) offered better effectiveness over other films. The total chlorophyll concentration, showing a good correlation with the colorimetric parameters of luminance (L∗) and chroma (respectively R2=0.92 and R2= 0.96) confirmed, in the case of the Ariddo di Core cultivar, the results obtained by monitoring other parameters thus highlighting the usefulness of integrating multiple indexes in evaluating the performance of the storage methods used
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