Search results for "atmosphere"

Quality indicators for modified atmosphere packaging (MAP) storage of high-quality European plum (Prunus domestica L.) cultivars.

2016

The 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 e…

The effect of modified atmosphere packaging on the physical and chemical quality of fresh yellow plum cultivars

2013

The aim of this work was to store fresh yellow plums (cvs. Sanacore and Ariddo di Core) for a maximum of 20 days at 1°C±1 and 90–95% relative humidity (RH) using modified atmosphere (MA) technology (flowpack system). Fruits of both cultivars were sealed in baskets with six films and compared with fruit stored under a normal atmosphere (NA). The effect of several packaging materials and several gas concentrations in modified atmosphere packaging (MAP) were evaluated on the postharvest quality of plums considering the weight loss, flesh texture, total soluble solids (TSS) and titratable acidity (TA). Samples were monitored at 0, 5, 10, 15 and 20 days. All continuous plastic films used have ox…

Identifying the threshold of soil water content for the precise irrigation scheduling of a Citrus orchard under subsurface drip irrigation

2019

Proper irrigation scheduling requires the knowledge of the soil-plant-atmosphere system, including the relationships existing between its various components. During the last decade, the monitoring of soil water content (SWC) has been considered a standard way to determine when crops need to be irrigated. However, under drip irrigation systems in which laterals are laid on the soil surface or buried at a certain depth, the gradients of soil water content are rather high and therefore the threshold of SWC below which crop water stress occurs should account for the position of the sensors; the threshold, in fact, depends on the specific crop system, as well as on the relative position of the m…

Pneumatic press equipped with the Vortex system for white grapes processing: First results

2019

The interaction between mechanical, computer and electronic technologies offers nowadays highly innovative solutions to be applied to the oenological machinery industry. Grapes pressing for the extraction of must from the grapes has a fundamental role for obtaining wines with high quality. The pneumatic presses commonly used work with a discontinuous cycle, taking on average about 3 hours for the extraction of the juice from the grapes. During this period, the presence of oxygen in contact with grapes can modify the qualitative characteristics of the future wine. The aim of the research was to study the “Vortex System” applied to a pneumatic press and to evaluate the quality of wines obtain…

The combination of freezing and modified atmosphere packaging inhibits melanosis in giant red shrimp

2014

The mass determination challenge for exoplanetary science

2023

The mass of an exoplanet is a key parameter for the characterisation of the internal structure of a planet, as well as the study of the formation and the evolution of the planet, and its atmosphere. The radial velocity technique allows for measuring the planetary mass from the radial velocity variation of its parent star. However, limitations in the property determination of exoplanets, particularly in their masses, can arise from various sources especially from astrophysical noise due to stellar variability, caused by magnetic activity, which affects the detection and characterisation of exoplanets. This PhD thesis aims to understand the impact of our knowledge of the planetary mass in the…

THE INTERACTION OF THE STELLAR HIGH ENERGY RADIATION WITH THE CIRCUMSTELLAR MEDIUM

The purpose of this Thesis is to study how stellar high energy radiation affects exo- planetary atmospheres. High level of stellar high energy, X-rays and (vacuum end extreme) ultraviolet radiation may prevent planets’ habitability and limit the width of the habitability zone. Such radiation may ionize a star surrounding, affecting the chemistry and thermal bal- ance. The effects of X-rays can be wide ranging or relatively local. Soft X-rays are absorbed closer to the source than X-rays with energy greater than 1 keV. The absorption cross-section of hard X-rays are generally very small, so that such radiation may affect a whole galaxy to some extent. The product of photo-ionization is a cas…

MODELLING WATER AND ENERGY BALANCE OF THE LAND-ATMOSPHERE SYSTEM USING HIGH RESOLUTION REMOTE SENSING DATA

2011

La rilevanza assunta dal risparmio della risorsa idrica negli ultimi anni ha spinto verso una corretta quanti cazione delle perdite legate al processo evapotraspirativo, al ne di una gestione parsimoniosa della risorsa stessa. In particolare nei sistemi agricoli soggetti a stress severo, sia la misura che la stima dell'evapotraspirazione (ET) ad un'adeguata risoluzione spaziale e temporale sono uno dei principali problemi da a rontare per la comunit a scienti ca. Recentemente, le tecniche di telerilevamento sono divenute un ulteriore strumento a supporto della modellistica idrologica distribuita; in particolare, le immagini acquisite nelle onde corte e nell'infrarosso termico risultano esse…

Designing Atmospheres. The Role of Aesthetics in the Requalification of Space

2017

The ecological movements of the seventies gave environmental questions the role of key issues in the artistic, architectural and philosophical debate. However, these questions have been mainly dealt with an ecological and scientific approach. It was seldom noticed that both natural and built spaces can be above all conceived of as felt spaces and, furthermore, that their aesthetic qualities are as important as toxicological factors. Although it focussed on the environmental protection and on the harmonious integration of built-up and natural areas, the architectural reflection considers beauty a subordinate factor rather than a prime concern. Although during the recent years it has come bac…

Iperestetica. Arte, natura, vita quotidiana e nuove tecnologie

2012

La società odierna è caratterizzata dall’eccesso, dall’esasperata ricerca di bellezza sia psico-fisica (dalla ginnastica allo yoga, dalla moda alla cosmetica, dalla chirurgia estetica all’ingegneria genetica) sia materiale (dagli abiti agli accessori, dal telefonino all’automobile). Di fronte a questa realtà in cui l’apparenza, il piacere e il divertimento sono divenuti, in ogni campo, gli obiettivi dominanti l’estetica deve sforzarsi di superare i confini “canonici” di un’astratta speculazione accademica al fine di orientare in senso pragmatico la sfera d’indagine. Diviene, quindi, sempre più urgente individuare nuove categorie e adottare più adeguati modelli epistemologici. Da qui l’ipote…