Search results for "Pascal"
showing 10 items of 76 documents
The role of water in the impact of high pressure on the myrosinase activity and glucosinolate content in seedlings from Brussels sprouts
2019
Abstract In this study, it was shown that the amount of available water was found to influence the high pressure processing (HPP) effect on both myrosinase activity and total glucosinolate concentration in Brussels sprouts seedlings. Brussels sprouts seedlings with different water content (wc = 4.8–89.4%) and water activity (aw = 0.17–0.97) were pressurized at selected pressures between 200 and 800 MPa (5 °C and 3 min), thereby affecting pressure-induced enzyme denaturation, molecular diffusion, and cell permeability differently. The myrosinase activity and intact glucosinolate content in the dry seedlings (wc Industrial relevance High pressure processing (HPP) is increasingly applied in t…
La mano del diavolo e il cuore di Pascal
2018
This paper aims to analyze the concept of fear in La main du diable, a movie of Maurice Tourneur. The film shows the Faustian pact between a bad artist and the devil. The pact concerns a wretched hand, and the obsession that will lead the protagonist to free it. The director has been able to show two kinds of fear, which, taken in isolation, seem to be a chiasm: the fear of death, which is afraid of a condition of life that leads to death (misery, failure, lack of love), and the fear of life, which is afraid of eternity, of an eternal suffering, of a life that does not remedy the loss of one's being. And these fears are afraid of the image and fear of the lack of image. The heart's reasons …
Les exilés et l'enseignement de l'espagnol en France
2006
International audience; Au moment où la France accorde l’asile au demi million d’Espagnols qui fuient Franco, la langue espagnole n’intéressait qu’une minorité restreinte d’élèves. Au début des années cinquante, alors que l’anglais et même l’allemand connaissaient les faveurs accrues de la jeunesse, l’espagnol continuait de végéter au sein d’un système éducatif où rien n’était entrepris pour le rendre plus attractif. Au cours des années qui suivirent, l’arrivée au lycée des enfants des exilés républicains, et d’une façon plus localisée, le souvenir du rôle joué par les républicains-résistants dans la libération des certaines villes du sud, modifièrent sensiblement cette situation. Les desce…
PENSARE LA CONCILIAZIONE. IL CONCETTO DI CUORE IN PASCAL
2021
La tesi di dottorato mira a mostrare il metodo e al tempo stesso il contenuto prezioso del cuore nella filosofia di Blaise Pascal. Il cuore suggerisce nella filosofia, nella lettura proposta, il tema della "conciliazione". Il tema del cuore infatti mostra non tanto o non solo una opposizione con la ragione, ma un accrescimento della ragione stessa, ovvero un recupero di quella dimensione patica che il razionalismo moderno tende a mettere da parte. This thesis aims to show the method and at the same time the precious content of the heart in the philosophy of Blaise Pascal. The heart proposes the theme of conciliation in philosophy. The theme of the heart in fact shows not an opposition with …
La filosofia in fiamme. Saggio su Pascal
2020
La filosofia, come ci proviene da Platone e Aristotele, è amore della sapienza. Di questa origine l'avvenire ha conservato ben poco. La modernità, in particolare, ha definito la forma originaria dell'abbandono dell'erotica originaria, assimilando la filosofia alla scienza all'interno del progetto di riduzione dell'ente al pensiero. Eppure, nel vivo dell'abbandono, nel cuore della modernità, Pascal riaccende la fiamma originaria. Sulla scorta di questa tesi di fondo, il saggio istituisce un confronto fra Platone, Aristotele e Pascal che lascia apprezzare una sorprendente continuità nella discontinuità fra l'antico e il moderno. Philosophy, as it comes from Plato and Aristotle, is the love of…
Thermal and high-pressure stability of purified polygalacturonase and pectinmethylesterase from four different tomato processing varieties
2006
Abstract Polygalacturonase (PG) and pectinmethylesterase (PME) were extracted and purified from four tomato varieties (Galeon, Malpica, Perfectpeel and Soto) used in the processing industry. The processing stability (thermal and high pressure) of PG and PME from the four varieties was analyzed, and they all showed the same behavior. PG was present in two isoforms, PG1 (inactivated at 90 °C, 5 min) and PG2 (inactivated at 65 °C, 5 min). In contrast, PG1s and PG2s showed the same pressure stability, both can be inactivated at room temperature in the pressure range of 300–500 MPa. On the other hand, purified PMEs could be thermally inactivated (5 min, 70 °C) but 50% of its activity remained af…
Stability of Antimutagenic Activities in Fruit and Vegetables during High Pressure Processing
1998
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…
Application of HPP in food fermentation processes
2020
Abstract High pressure processing (HPP) is widely used in the food industry for nonthermal pasteurization of juices, ready-to-eat meals, dairy products, pet food, etc. The pasteurization effect is induced by damaging the membranes of microorganisms (leading to cell lysis) as well as by protein denaturation, thus interrupting cellular functions such as nutrient uptake, DNA replication, etc. Nevertheless, as a thermodynamic variable, pressure can also be used to enhance the fermentative processes if applied at sublethal levels (up to 50/60 MPa) to induce metabolic shifts in microorganisms, This allows accelerating the fermentative processes or even obtaining different compounds resulting from…
High pressure processing of food-grade emulsion systems: Antimicrobial activity, and effect on the physicochemical properties
2019
Abstract The use of high pressure processing (HPP) for development of stable emulsion-based delivery systems has been recently increased. Under adequate conditions, application of high pressures modifies the functionality of protein and polysaccharide molecules and significantly promotes the emulsifying activities. Application of high pressures also modulates the emulsion microstructure without any destabilization and gelation of protein molecules. The lipid oxidation in HPP-treated emulsions can be accelerated, particularly with higher pressure levels, while the HPP utilization on emulsions in acidic conditions can highly inhibit the growth of spoilage and pathogenic microorganisms. In thi…