Alberto Jorge Eraso
National University of Cordoba
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Featured researches published by Alberto Jorge Eraso.
Microbiology | 1985
Inés Albesa; Lucila Isabel Barberis; Maria Cristina Pájaro; Alberto Jorge Eraso
Summary: The influence of the nitrogen source on pyoverdine production by Pseudomonas fluorescens grown in chemostat culture in synthetic media at constant pH was studied. Pigment synthesis was highest in a medium with proline as the nitrogen source; other amino acids were less effective in promoting pigment synthesis. The pH and Fe3+ content of the media affected pyoverdine production. The ratio of pigment to growth was maximal at pH 8. When the Fe3+ concentration was increased from 10 to 200 μg 1-1 in media with the same nitrogen source, pyoverdine synthesis decreased. Since the Fe3+ contents of the synthetic media were different, the amount present was adjusted to a standard concentration to permit comparisons between the various nitrogen sources.
The American Journal of Chinese Medicine | 2007
Alberto Jorge Eraso; Inés Albesa
Chloramphenicol is a toxic antibiotic used for certain infections, though aplastic anaemia is one of its side-effects. The results of our experiments showed that blood cells suffered oxidative stress in the presence of chloramphenicol, with a significant increase in reactive oxygen species (ROS) detected by luminol-chemiluminescence (CL). The extract of fruits of Eriobotrya japonica markedly decreased ROS in leukocytes and erythrocytes, the oxidative stress caused by this antibiotic. Nitro Blue Tetrazolium (NBT) assay with purified leukocytes demonstrated that the antioxidant action of E. japonica caused an intracellular reduction in ROS, and that the extracts decreased these promoters of oxidative stress to normal levels in the cytoplasm. Determinations of nitric oxide (NO) generation indicated that E. japonica extracts also inhibited the stimuli of NO provoked by chloramphenicol. This study showed that the immediate antioxidant effect of E. japonica could be associated with the action of vitamin A. The protective action of this fruit was seen on mature leukocytes and erythrocytes, beneficial effect on blood cells suggest that its extract could be used as an antioxidant agent complementing the administration of chloramphenicol, as a modern-day extension to its traditional use in Chinese medicine.
Luminescence | 2011
Claudia Albrecht; María G. Pellarin; José L. Baronetti; María José Rojas; Inés Albesa; Alberto Jorge Eraso
This study was undertaken to elucidate the antioxidant effect of Zizyphus mistol and Prosopis alba, with the hypothesis that these fruits can counteract the induction of reactive oxygen species (ROS) caused by toxins produced by Escherichia coli. In the search of nutrients effective against the Hemolytic Uremic Syndrome (HUS), we detected by chemiluminescence a protective role of both plants, due to their natural antioxidants significantly decreasing the levels of ROS induced by toxins from E. coli in blood. The ferric reducing antioxidant power (FRAP) was found to be higher in Z. mistol than in P. alba. The chemical analyses of the phenols and flavonoids present in the fruit extracts indicated that the FRAP correlated with the amount of phenolic compounds, but not with the flavonoids analyzed. Both fruits studied reduce the induction of ROS, and in this way help to prevent the development of complications related to oxidative stress generated in the blood of patients with HUS.
Canadian Journal of Microbiology | 1985
Inés Albesa; Lucila Isabel Barberis; Maria Cristina Pájaro; María Cecilia Farnochi; Alberto Jorge Eraso
Canadian Journal of Microbiology | 1986
Lucila Isabel Barberis; Alberto Jorge Eraso; Maria Cristina Pájaro; Inés Albesa
Medicinal Chemistry Research | 2001
P. Bogdanov; Cristina S. Ortiz; Alberto Jorge Eraso; Inés Albesa
Microbiological Research | 2005
Alberto Jorge Eraso; Inés Albesa
Revista Do Instituto De Medicina Tropical De Sao Paulo | 1982
B Basso; E Moretti; Ines Albesa; Alberto Jorge Eraso; F Kravetz; Antonio D'Alessandro
Journal of Food Processing and Preservation | 1996
Alberto Jorge Eraso; Inés Albesa
American Journal of Tropical Medicine and Hygiene | 1983
Inés Albesa; Alberto Jorge Eraso