451 resultados para loin


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High hydrostatic pressure is being increasingly investigated in food processing. It causes microbial inactivation and therefore extends the shelf life and enhances the safety of food products. Yeasts, molds, and vegetative cells of bacteria can be inactivated by pressures in the range of 200 to 700 MPa. Microorganisms are more or less sensitive to pressure depending on several factors such as type, strain and the phase or state of the cells. In general, Gram-positive organisms are usually more resistant than Gram-negative. High pressure processing modifies the permeability of the cell membrane, the ion exchange and causes changes in morphology and biochemical reactions, protein denaturations and inhibition of genetic mechanisms. High pressure has been used successfully to extend the shelf life of high-acid foods such as refrigerated fruit juices, jellies and jams. There is now an increasing interest in the use of this technology to extend the shelf life of low-acid foods such as different types of meat products.

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Loin de Medine est le dernier roman publie jusqu'a I'heure d'Assia Djebar, qui est la representante la plus celebree des femmesecrivains faisant partie de ce qu'on appelle la "Iitterature maghrebine d'expression franyaise", c'est-a-dire celle produite par des auteurs d'origine maghrebine mais ecrivant en franyais. Cette Iitterature francomaghrebine est particulierement active de nos jours: par le nombre et la qualite de ses productions, elle est au premier plan du domaine francophone, ou franyais tout court (car la majorite de ces oeuvres sont publiees en France), et les femmes-ecrivains, qui s'y sont la plupart incorporees assez recemment, y ont un role de plus en plus saillant. Assia Djebar, qui a deja une longue et fructueuse carriere derriere soi (six romans et un recueil de nouvelles publies, ainsi que des incursions dans la poesie, le theatre et le cinema),' est une des pionnieres de cette Iitterature, car son premier roman est paru en 1957.

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Loin de Medine est le dernier roman publie jusqu'a I'heure d'Assia Djebar, qui est la representante la plus celebree des femmesecrivains faisant partie de ce qu'on appelle la "Iitterature maghrebine d'expression franyaise", c'est-a-dire celle produite par des auteurs d'origine maghrebine mais ecrivant en franyais. Cette Iitterature francomaghrebine est particulierement active de nos jours: par le nombre et la qualite de ses productions, elle est au premier plan du domaine francophone, ou franyais tout court (car la majorite de ces oeuvres sont publiees en France), et les femmes-ecrivains, qui s'y sont la plupart incorporees assez recemment, y ont un role de plus en plus saillant. Assia Djebar, qui a deja une longue et fructueuse carriere derriere soi (six romans et un recueil de nouvelles publies, ainsi que des incursions dans la poesie, le theatre et le cinema),' est une des pionnieres de cette Iitterature, car son premier roman est paru en 1957.

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The objective of this work was to evaluate the influence of the breed and of the addition of bioactive substances to forage on the color of smoked pork loin. Two pig breeds (Polish Landrace and the crossbreed Polish Landrace x Duroc), three types of bioactive components (organic selenium; 2% of canola oil and 1% of flaxseed oil; and 2% of flaxseed oil and 1% of canola oil), and a control treatment were evaluated. Computer image analysis included the color assessment of muscle, fat, connective tissues, and smoked loin surface. For Polish Landrace, selenium supplementation caused higher values of red, green, and blue color components of the muscle tissue, which were lower for the crossbreed. However, there was no difference in the color components of loin fat tissue of the Polish Landrace breed due to selenium supplementation. In the case of oil supplementation, values of the color components of the muscle tissue for the Polish Landrace x Duroc crossbreed were also lower. The color components of muscle, fat, connective tissues, and smoked loin surface depend on the pig breed and on the bioactive compounds added to the forage.

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Aroma compounds in the headspace volatiles of fried bacon and fried pork loin were identified. The concentrations of volatiles in bacon were much lower than those in pork loin, except for nitrogen compounds. It is likely that these differences were caused by the presence of nitrite in bacon. Characteristic aromas for fried bacon, described variously as bacon-, fried meat-, roast meat- and cooked meat-like, were found through olfactory testing. These aromas were not present in the pork loin samples. Compounds such as pyrazines, pyridines and furans are thought to be responsible for these meaty aromas. (C) 2004 Society of Chemical Industry.

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The determination of loin eye area (LEA) is one of the most common methods to assess carcass quality and it is possible to adjust calculations to predict meat amount in the carcass which is one of the important features in the classification process. The aim of this study was to compare different methodologies used to determine LEA in swine. Fifteen crossbred pigs, Landrace x Large White, males and females, were slaughtered at 140 days of age. After 24 hours of cooling at 4°C, the Longissimus dorsi muscle was removed from the left half part of carcasses for evaluation of LEA between the 12th and 13th rib. The methods were: point counting on plastic grid of 1 cm2 and 0.25 cm2 (PCGP 1 cm2 and PCGC 0.25 cm2 ), circumference method by Echo Image Viewer (ECHO), circumference method using AutoCad ® program (CAD) and method of weighing paper (WP). The design was completely randomized with 15 replications per treatment and the data were subjected to Pearson correlation and variance analysis. Averages were compared by Tukey test at a significance level of 5%. LEA values were: 35.84, 35.69, 33.86, 34.22 and 36.71 cm2 , for the PCGP 1 cm2 , PCGP 0.25 cm2 , ECHO, CAD and WP methods, respectively. The LEA values determined by methods PCGP 1 cm2 , PCGP 0.25 cm2 and WP were similar; however they were higher than those obtained by the ECHO and CAD methodologies (P<0.0001). PCGP 1 cm2 , PCGP 0.25 cm2 and WP methods may overestimate LEA values. The choice of method to be used should be based on its practicality and availability of resources, since the difference obtained between them is low.

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