Search results for "reserva"
showing 10 items of 630 documents
SISTEMI DI COPERTURE INNOVATIVE NEI CONTESTI ANTICHI
2014
La ricerca è indirizzata al tema delle coperture in vetro a protezione di siti archeologici. Tale scelta è stata influenzata dalle seguenti considerazioni: gli ultimi decenni sono stati caratterizzati da un incremento delle coperture trasparenti protettive; il tema delle strutture di copertura in contesti archeologici e ciò che riguarda la loro progettazione, è stato, e continua ad essere oggi, molto dibattuto tra gli esperti in tutto il mondo; la costante evoluzione tecnologica del vetro continua a incrementare le sue possibilità d’uso in architettura. Tale materiale presenta numerosi vantaggi come l’apparente leggerezza e la trasparenza ma in ambito archeologico pone problematiche che rig…
On site archaeological museums: types of protection
2011
The decision to preserve, in their original context, even the most fragile artefacts, such as floor and wall coverings and to exhibit the delicate stratigraphic or clay manufactures, has favoured the spread of archaeological museums in situ, by interventions aimed at the preservation of archaeological remains. Archaeological museums represent a particular typology capable of relating history through its ruins. Therefore, it is not a museum having typological and functional characteristics that answer to codified museum-graphical and display rules . The arrangement and the public opening of the archaeological sites in recent years have been the object of discussions, debates and interdiscipl…
Preventive Conservation: a Key Method to Ensure Cultural Heritage’s Authenticity and Integrity in Preservation Process
2012
This article studies the role of preventive conservation in cultural heritage preservation. It shows through cultural heritage theory and conservation professions development process how important part preventive conservation has had and still has in cultural heritage preservation and damage prevention. Preventive conservation is a multidisciplinary orientation that uses indirect measures and actions to avoid or to minimize future deterioration or loss of cultural heritage. Conservation professionals should recognize its importance as the most effective method in promoting the long-term preservation of cultural heritage. Therefore, preventive conservation should be the basic theoretical per…
Impacto del bilingüismo sobre la estructura cerebral
2015
Tradicionalment la recerca neurocientífica sobre el bilingüisme s’ha centrat en les implicacions funcionals. El cervell és un òrgan en constant canvi durant tota la vida (per causes genètiques i no genètiques), i la intensitat i freqüència amb què usem el llenguatge fan del bilingüisme una condició d’elevada demanda cognitiva. En l’última dècada s’ha produït un progrés significatiu pel que fa als correlats neurals del processament i la representació del llenguatge, en gran part gràcies als avanços en les tècniques de neuroimatge. Nombrosos estudis han mostrat que el bilingüisme podria estar relacionat amb increments del volum de substància grisa i una integritat superior de la substància bl…
DEGRADATIVE ENZYMATIC ACTIVITIES IN FRESH-CUT BLOOD ORANGE SLICES DURING CHILLED STORED
2009
Summary Blood-orange fruits are suitable to fresh-cut fruit production because of their chemical compositions. Nevertheless, the main limitation of using freshly cut oranges is their susceptibility to juiciness loss and ascorbic acid degradation because of enzymatic alterations. The aim of this work is: to identify some of the enzymes causing the qualitative decay in blood-orange slices during 15 days of chilled storage (at 4 ± 0.5 °C and 85% RH); to investigate the susceptibility to the previous alterations of five blood-orange clones (Moro nucellare, Sanguinello nucellare, Tarocco arcimusa, Tarocco gallo and Tarocco meli) to select the most suitable one for fresh-cut production. The enzym…
BIOPOLYMERS USED AS EDIBLE COATING TO LIMIT WATER TRANSFER, COLOUR DEGRADATION AND AROMA COMPOUND 2-PENTANONE LOST IN MEXICAN FRUITS
2005
Low preservation of typical fruits in countries with warm weather represents a limitation to export. A recently proposed method to increase shelf-life of fresh guava, is the application of biopolymers as edible coatings. This research involves the use of biopolymers of microbial origin obtained with low cost nutrients, to prepare edible coatings applied on mexican guava and apricot. Dextrans obtained by fermentation with Leuconostoc mesenteroides isolated from a typical mexican beverage named pulque (cactus juice fermented). Dextrans were purified by precipitation with methanol and dispersed in purified water. This procedure was repeated 3 times to eliminate carbohydrates others than dextra…
An investigation of the bacteriocinogenic potential of lactic acid bacteria associated with wheat (triticum durum) kernels and non-conventional flours
2008
One hundred and thirty-seven lactic acid bacteria (LAB), previously isolated from wheat (Triticum durum) grains and non-conventional flour samples, were tested for the production of antibacterial substances. A total of 16 strains (5 Enterococcus faecium, 5 Enterococcus mundtii, 4 Pediococcus pentosaceus, 1 Lactobacillus coryniformis and 1 Lactococcus garvieae) were found to inhibit the growth of Listeria innocua. The antibacterial activities were preliminarily investigated for their general behaviour with proteolytic (proteinase K, protease B and trypsin), amylolytic (α-amylase) and lipolytic (lipase) enzymes, after heat treatment, and exposure to different pHs and ethanol concentrations. B…
Development of new strategies to assess the safety of controlled ovarian stimulation for fertility preservation in breast cancer patients
2023
El càncer de mama és la neoplàsia més comuna en dones en edat reproductiva. Les millores en el diagnòstic i el tractament d'aquesta malaltia han suposat un important descens en la mortalitat en els darrers 20 anys. Tot i això, el tractament quimioterapèutic del càncer de mama resulta altament gonadotòxic, sovint danyant la funció ovàrica i implicant una pèrdua de la fertilitat posterior. Per aquest motiu, oferir la possibilitat de preservar la fertilitat en dones amb desitjos reproductius posteriors resulta de vital importància. Entre les opcions per preservar la fertilitat femenina, la criopreservació d'ovòcits i/o embrions destaca com la tècnica amb més èxit a la pràctica clínica habitual…
Prediction of the curing time of Spanish hams using peptide profiles established by capillary zone electrophoresis
2009
Abstract A capillary zone electrophoresis procedure for the prediction of curing time of Spanish hams using peptide profiles has been developed. Excellent resolution between the seven peptide peaks was achieved within 30 min analysis time with a BGE containing 60 mM MgSO 4 and 50 mM phosphate at pH 2.5. Using hams with curing times of 6, 8 and 12 months, both linear discriminant analysis (LDA) and multiple linear regression (MLR) models were constructed. In both cases, two different normalisation procedures of the peak areas were compared. Using LDA, all the ham samples corresponding to the three categories were correctly classified. Using MLR, the ham curing time could be predicted with av…
Fatty acid profile changes during orange juice‐milk beverage processing by high‐pulsed electric field
2007
High-intensity pulsed electric fields (HIPEF) is an emerging non-thermal food preservation technology which has the potential to pasteurize pumpable liquid foods. Its application is being studied to evaluate it as potential alternative or complementary process to thermal pasteurization. Orange juice-milk beverage with added bioactive components is a ready-to-drink beverage developed as an alternative to traditional soft drinks. In the present work, two HIPEF treatments (35 and 40 kV/cm) and six different treatment times (from 40 to 180 µs) were evaluated to assess their effect on the fatty acid profile of an orange juice-milk beverage fortified with n-3 fatty acids and oleic acid. The effec…