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Articles by C. Adelantado
Total Records ( 5 ) for C. Adelantado
  S. Corbalan , C. Adelantado , M.A. Calvo and T. Mora
  The main objective of this study was to value the enzymatic pattern and its relationship with the possible antimicrobial activity of some strains of the genus Penicillium used when elaborating Sumaia (typical sausage from Catalonia). From the results obtained, it may assess that these strains own a marked phosphatase, hydrolase and glucosidase activity directly related to their antimicrobial capacity. This fact allows to considerate that their addition in meat products elaboration process helps likewise a better control of undesirable microbiota.
  F. Figueras , C. Adelantado , C. Shiva , J.J. Hernandez and M.A. Calvo
  This study provides Enterobacter spp. lactose negative strains characterization susceptible of being wrongly identified as Salmonella spp. having into account its meaning for what concerns on food safety. More than five hundred feed samples for farm animal feeding were microbiologically analyzed according the Spanish Normative for feed, in which different media are accepted for detecting Salmonella spp. after performing preenrichement steps. In this study SS agar was chosen for differential isolation. Results show that 55% of those colonies supposed to be Salmonella spp. belonged to the genus Enterobacter when performing confirmation by means of API20E method and TSI/LIA tests, indicating that several strains of the genus Enterobacter have lost their condition of lactose positive microorganisms and becoming lactose negative, inducing confusion when trying to identify Salmonella spp. by traditional and reference methods.
  M.A. Calvo , E. Angulo , P. Costa-Batllori , C. Shiva , C. Adelantado and A. Vicente
  Two trials were carried out to study how a compound formed by natural extracts from Rutaceae plants, cinnamon oil and organic acids (RUTEX® PG) could have an effect on intestinal microorganisms on piglets. To obtain this synergistically combination first of all natural extracts and organic acids were separated individually to see its inhibitory action on bacterial growth in vitro. Secondly, the aim was to search the best natural extract and organic acid combination between all the possible ones. RUTEX® PG was the combination that was used in vivo trials with piglets. To study RUTEX® PG effects on piglets two trials were designed. The trials consisted in a comparison between the effect of adding RUTEX® PG to the feed on the intestinal microorganisms of piglets and the effect of antibiotics in feed. The in vitro experiments results showed a synergistic effect of the Rutaceae plant extract and the organic acids tested (citric, formic, lactic and propionic) against different microorganisms: growth inhibition was observed for the organic acid-natural extract combination, while the same concentrations did not show any inhibition when the products were tested separately. Inhibitory activity for cinnamon oil was not tested, because it was added in a very low concentration just to confer an aromatic effect. It was observed, as well, lower bacterial counts at the intestinal segments (duodenum, jejunum, ileum and colon) in comparison with the negative control group. The conclusion is that we can say RUTEX® PG can be active all along the gastro-intestinal segments.
  M.A. Calvo , L. Arosemena , M. Agut , C. Adelantado and H. Aissaoui
  The main objective of this research project was to investigate the possibility of inhibiting the growth of filamentous fungi, yeasts and bacteria isolated from soil samples, the trunk, leaves and fruit of palm trees infected with bayoud, using strains of the Arthrinium genus. Arthrinium aureum and Arthrinium phaeospermum have notable inhibiting properties on Fusarium oxysporum and F. niveum, standing out in the literature as the main etiological agents in the bayoud process in oases, meaning that active strains of Arthrinium can be applied in the biological control of the process.
  S. Centeno , C. Adelantado and M.A. Calvo
  Competition between micro-organisms and the production of inhibitor substances by some of these micro-organisms is frequent in substrata with varied, complex microbiota, such as cork. The main aim of this study was to determine the inhibitor activity of filamentous fungi, yeasts and bacteria isolated from wine bottle corks. The inhibitor activity of isolated micro-organisms was determined by placing disks of pure culture in Petri dishes containing 2% malt extract agar for fungi and trypticase soy agar for bacteria. These were surface-seeded beforehand with the test micro-organism, the dishes are incubated in conditions suitable for the growth of the surface-seeded micro-organisms and finally the inhibitor plaques produced are measured. The results indicate that the micro-organisms with the greatest inhibitor activity are Penicillium citrinum and Trichoderma viride.
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