Search results for "Crono"
showing 10 items of 76 documents
Drying parameters greatly affect the destruction of Cronobacter sakazakii and Salmonella Typhimurium in standard buffer and milk
2017
International audience; Salmonella Typhimurium and Cronobacter sakazakii are two foodborne pathogens involved in neonatal infections from milk powder and infant formula. Their ability to survive in low-moisture food and during processing from the decontamination to the dried state is a major issue in food protection. In this work, we studied the effects of the drying process on Salmonella Typhimurium and Cronobacter sakazakii, with the aim of identifying the drying parameters that could promote greater inactivation of these two foodborne pathogens. These two bacteria were dried under different atmospheric relative humidities in milk and phosphate-buffered saline, and the delays in growth re…
Caco-2 Invasion by Cronobacter sakazakii and Salmonella enterica Exposed to Drying and Heat Treatments in Dried State in Milk Powder
2017
International audience; Due to the ability of foodborne pathogens to survive in low moisture food, the decontamination of milk powder is an important issue in food protection. The safety of food products is, however, not always insured and the different steps in the processing of food involve physiological and metabolic changes in bacteria. Among these changes, virulence properties may also be affected. In this study, the effect of drying and successive thermal treatments on the invasion capacity of Salmonella Typhimurium, Salmonella Senftenberg, and Cronobacter sakazakii was assessed. Bacteria were dried on milk powder at three different water activity levels (0.25, 0.58, and 0.80) and hea…
Modeling the heat inactivation of foodborne pathogens in milk powder : High relevance of the substrate water activity
2017
International audience; Due to the ability of foodborne pathogens to survive in low moisture foods, the decontamination of these products is an important issue in food hygiene. Up to now, such decontamination has mostly been achieved through empirical methods. The intention of this work is to establish a more rational use of heat treatment cycles. The effects of thermal treatment cycles on the inactivation of dried Salmonella Typhimurium, Salmonella Senftenberg, Cronobacter sakazakii and Escherichia coli were assessed. Bacteria were mixed with whole milk powder and dried down to different water activity levels (0.11, 0.25, 0.44 and 0.58). The rate of inactivated bacteria was determined afte…
Cellular Injuries in Cronobacter sakazakii CIP 103183T and Salmonella enterica Exposed to Drying and Subsequent Heat Treatment in Milk Powder
2018
International audience; Because of the ability of foodborne pathogens to survive in low-moisture foods, their decontamination is an important issue in food protection. This study aimed to clarify some of the cellular mechanisms involved in inactivation of foodborne pathogens after drying and subsequent heating. Individual strains of Salmonella Typhimurium, Salmonella Senftenberg, and Cronobacter sakazakii were mixed into whole milk powder and dried to different water activity levels (0.25 and 0.58); the number of surviving cells was determined after drying and subsequent thermal treatments in closed vessels at 90 and 100 degrees C, for 30 and 120 s. For each condition, the percentage of unc…
La necrópolis tardo-antigua del Tossal de les Basses (Alicante, España): tipología y primera aproximación interpretativa y cronológica
2015
Se presenta en este artículo un resumen del estudio pormenorizado que hemos realizado sobre una importante necrópolis tardo-antigua que, hoy por hoy y pese a su extensión y número total de individuos (cerca del millar), no puede vincularse con ningún núcleo urbano de importancia. Su desarrollo desde mediados del s. IV hasta la llegada de los musulmanes a inicios del s. VIII, y la aparición de un nuevo asentamiento y necrópolis alto-medieval en sus cercanías, hacen a esta necrópolis fundamental para entender la evolución de la zona con posterioridad a la desaparición en el s. III de la ciudad romana de Lucentum. Summary of detailed study we performed on a late ancient cementery were unable t…
La Cova de l’Hort de Cortés-Volcán del Faro (Cullera, Ribera Baixa, País Valenciano). Datos para la discusión de las ocupaciones presolutrenses
2020
Los resultados de las excavaciones realizadas entre 1968 y 1984 en la Cova de Hort de Cortés- Volcán del Faro quedaron limitados a identificar materiales solutrenses, magdalenienses y neolíticos-calcolíticos. Una lectura crítica de la Memoria de excavaciones, publicada en 2003, permitió plantear la posibilidad de la presencia de ocupaciones anteriores, posiblemente gravetienses. En 2018 se iniciaron nuevos trabajos en el yacimiento, dentro de un proyecto que pretende recuperar información a partir de los cortes de las antiguas excavaciones. Los datos obtenidos en el área más externa (corte frontal posterior, cuadrícula O4) han permitido retomar la discusión sobre la existencia de los nivele…
Parco Uditore - Cronaca di una iniziativa popolare con il supporto delle istituzioni
2013
La cronaca del recupero di una area verde pubblica offerta dai cittadini ai cittadini. Un progetto per Palermo
Chronographia, ò reportorio de los tiepos, el mas copioso y preciso q hasta ahora ha salido a luz / copuesto por Hieronymo de Chaues ...
1566
Sign.: +10, a-z8, A-I8 Tít. i retrat de l'autor emmarcats dins orla orn. - Gravats xil. al llarg del text Tipus gòt. - Postil·les. - Caplletres
The Calabrian Stage redefined
2008
The name Calabrian was introduced in the geological literature by the French stratigrapher Maurice Gignoux in 1910, and later described in his important monograph (633 pages) "Les formations marines pliocènes et quaternaires de l'Italie du sud et de la Sicile" published in 1913. Detailed data were provided on several sections (Santa Maria di Catanzaro, Caraffa, Monasterace, Palermo) and on their fossil content. The Calabrian Stage has commonly been used for over fifty years as the oldest subdivision of the Quaternary, notably in the time scales of Berggren & van Couvering (1974) and Haq & Eysinga (1987). However, after the GSSP for the Pliocene/Pleistocene boundary (P/P) was approved by INQ…
Considerations on an integrated biochronological scale of Italian Quaternary Mammals
2011
Viene analizzato il lavoro di MASINI e SALA (2007) sull’approccio integrato della distribuzione dei grandi e piccoli mammiferi dell’Italia continentale del tardo Pliocene e del Pleistocene, tenendo conto della nuova definizione del Quaternario, mettendo in risalto i punti di forza e quelli deboli della scala proposta. Vengono inoltre aggiunti nuovi dati sulla biocronologia a mammiferi del Pleistocene Superiore. The paper of MASINI and SALA (2007) regarding an integrated approach on the stratigraphic distribution patterns of large and small mammals in the late Pliocene and Pleistocene of the Italian peninsula is analysed, showing the weak and strong points. New data are presented on the mamm…