Hervé Rogez | UFPA - Federal University of Pará (original) (raw)
Papers by Hervé Rogez
Postharvest Biology and Technology, 2013
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Journal of the Science of Food and Agriculture, 2007
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Byrsonima crassifolia, known in Brazil as murucizeiro, is a productive tree, present in all the A... more Byrsonima crassifolia, known in Brazil as murucizeiro, is a productive tree, present in all the Amazonian Region and in Central America. Its two main products, simultaneously and rationally exploitable are the fruits and the leaves, the last ones having a high antioxidant capacity. Due to the interest for their antioxidant capacity, the drying process of the murucizeiro leaves has been
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Neurochemistry international, 2015
Açai (Euterpe oleracea Mart.), a highly consumed fruit in Amazon,is from a common palm with remar... more Açai (Euterpe oleracea Mart.), a highly consumed fruit in Amazon,is from a common palm with remarkable antioxidant properties. Because oxidative stress and seizures are intimately linked, this study investigated the potential neuroprotective and anticonvulsant effects of commercial clarified açai juice (EO). EO did not alter spontaneous locomotor activity. Four doses of EO were sufficient to increase latencies to both first myoclonic jerk and first generalized tonic-clonic seizure and significantly decrease the total duration of tonic-clonic seizures caused by pentylenetetrazol administration. Also, electrocortical alterations provoked by pentylenetetrazol were prevented, significantly decreasing amplitude of discharges and frequencies above 50 Hz. EO was also able to completely prevent lipid peroxidation in the cerebral cortex, showing a potent direct scavenging property. These results demonstrate for the first time that E. oleracea significantly protects against seizures and seizu...
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Food Chemistry, 2015
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Separation and Purification Technology, 2007
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Separation and Purification Technology, 2007
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Açai is a very popular polyphenol-rich fruit juice in the Amazonian region. In order to evaluate ... more Açai is a very popular polyphenol-rich fruit juice in the Amazonian region. In order to evaluate its effects on blood oxidative level, 350 ml açai juice were added to the daily diet of 30 male volunteers (aged 41±8.9 years) during 28 days. Fasting blood samples were obtained by vein puncture on day 0, 10, 20 and 28 and LDLs were
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Biomedicine & Pharmacotherapy, 2015
Copaifera spp oleoresins have been used in folk medicine for centuries; nevertheless, its immunom... more Copaifera spp oleoresins have been used in folk medicine for centuries; nevertheless, its immunomodulatory action has not been investigated. Thus, the goal of this study was to characterize different oleoresins and to verify their action on human monocytes regarding pro- and anti-inflammatory cytokine production (TNF-α and IL-10, respectively). The chemical composition of Brazilian Copaifera reticulata, Copaifera duckey and Copaifera multijuga oleoresins was analyzed by HPLC-MS. Cell viability was assessed by MTT method after incubation of cells with Copaifera spp. Noncytotoxic concentrations of oleoresins were incubated with human monocytes from healthy donors, and cytokine production was determined by ELISA. HPLC-MS analysis for terpenes allowed the identification of six diterpene acids and one sesquiterpene acid. Oleoresins exerted no cytotoxic effects on human monocytes. All oleoresins had a similar profile: LPS-induced TNF-α production was maintained by oleoresins, while a significant inhibitory action on IL-10 production was seen. Copaifera oleoresins seemed to exert an activator profile on human monocytes without affecting cell viability. Such effect may be due to the presence of either diterpene or sesquiterpene acids; however, further studies are necessary to determine the involvement of such compounds in Copaifera immunomodulatory effects.
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Journal of The Brazilian Chemical Society, 2007
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Food Chemistry, 2008
Many plants used in Amazonian folk medicine present a high antioxidant activity. In this study, t... more Many plants used in Amazonian folk medicine present a high antioxidant activity. In this study, the antioxidant activities of four largely used plants, namely Byrsonima crassifolia, Davilla kunthii, Davilla rugosa and Inga edulis, were evaluated, using methanolic extracts of their leaves, fruits and bark and several different in vitro tests, based either on the capacity to scavenge free radicals (ORAC,
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Food Chemistry, 2015
In this study, detailed chemical properties of sim (Rhodomyrtus tomentosa (Ait.) Hassk.) fruit in... more In this study, detailed chemical properties of sim (Rhodomyrtus tomentosa (Ait.) Hassk.) fruit including nutritional composition, phenolic content and antioxidant capacity were determined for the first time. A 150g serving of sim fruit contained high levels of dietary fibre (69.94-87.43% of Recommended Daily Intake (RDI)), α-tocopherol (38.90-51.87% RDI), manganese (>100% RDI), and copper (44.44% RDI) but low levels of protein (2.63% RDI), lipid (1.59-3.5% RDI), and sugars (5.65% RDI). The predominant fatty acid in the sim fruit sample was linoleic acid (75.36% of total fatty acids). Interestingly, total phenolics (49.21±0.35mg gallic acid equivalent (GAE)/g dry weight (DW)) were particularly high and resulted in a high antioxidant capacity (431.17±14.56μmol Trolox equivalent (TE)/g DW). These results, together with our recent discovery of high amount of piceatannol, a stilbene with potent biological activities, highlight the potential of sim, an under-utilised plant species from South-East Asia, as a new source of health-promoting compounds including dietary fibres, essential fatty acids, and phenolic compounds.
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Separation Science and Technology, 2010
The adsorption of five phenolic compounds of four different classes from aqueous batch solutions ... more The adsorption of five phenolic compounds of four different classes from aqueous batch solutions onto four styrene-divinylbenzene and acrylic resins (EXA 90, EXA 118, XAD 7, and XAD 16) was investigated regarding their equilibria, kinetics and surface-energy heterogeneity, and mechanisms of adsorption. The experimental equilibrium data were very well fitted to Langmuir and Freundlich models (R > 0.900). Three kinetic models
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Separation and Purification Technology, 2007
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Química Nova, 2010
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Journal of the Science of Food and Agriculture, 2007
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Journal of Food Science, 2012
The unavoidable damage of açai (Euterpe oleracea) fruits (AF) during picking leads to microbial c... more The unavoidable damage of açai (Euterpe oleracea) fruits (AF) during picking leads to microbial contamination and anthocyanin degradation, which prejudice the consumed fruit drink. Thirteen lots of AF (24 kg) from different municipal districts of the Pará State (Brazil) were monitored during a 75-h-long storage in the dark at 30 °C for microbial growth, and 7 lots for anthocyanin degradation. On arrival at the laboratory, anthocyanins presented a mean concentration of 828 mg kg(-1) fruits with a standard deviation of 323 mg kg(-1) fruits whereas mean microbial contamination was 2.64 10(6) CFU g(-1) of dry matter for total mesophilic bacteria, 1.98 10(3) MPN g(-1) DM for fecal coliforms, and 1.11 10(5) CFU g(-1) DM for moulds and yeasts. Kinetic growth of the microbes could be fitted to a quadratic equation with an unusual rapid growth during the 1st 24 h. The kinetics of anthocyanin degradation fitted a 1st-order equation. The mean velocity constant of the reaction (k(1)) was of 0.0137 h(-1) and the mean half-life (t(½)) of the anthocyanins was 50 h. These results indicate that the AF simultaneously suffer extensive anthocyanin degradation and explosive microbial growth during the postharvest period needing a special care.
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Journal of Food Composition and Analysis, 2011
... such an accumulation profile is the sigmoidal model 54 (Woodward, 1972; Rogiers and Knowles, ... more ... such an accumulation profile is the sigmoidal model 54 (Woodward, 1972; Rogiers and Knowles, 1997; Fern ndez-L pez et al., 1999; Rivera-L pez ... (2009) investigated the accumulation of five anthocyanins during 157 ripening (25 33 days) of Prunus domestica ( Jojo , Valor , a ...
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Postharvest Biology and Technology, 2013
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Journal of the Science of Food and Agriculture, 2007
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Byrsonima crassifolia, known in Brazil as murucizeiro, is a productive tree, present in all the A... more Byrsonima crassifolia, known in Brazil as murucizeiro, is a productive tree, present in all the Amazonian Region and in Central America. Its two main products, simultaneously and rationally exploitable are the fruits and the leaves, the last ones having a high antioxidant capacity. Due to the interest for their antioxidant capacity, the drying process of the murucizeiro leaves has been
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Neurochemistry international, 2015
Açai (Euterpe oleracea Mart.), a highly consumed fruit in Amazon,is from a common palm with remar... more Açai (Euterpe oleracea Mart.), a highly consumed fruit in Amazon,is from a common palm with remarkable antioxidant properties. Because oxidative stress and seizures are intimately linked, this study investigated the potential neuroprotective and anticonvulsant effects of commercial clarified açai juice (EO). EO did not alter spontaneous locomotor activity. Four doses of EO were sufficient to increase latencies to both first myoclonic jerk and first generalized tonic-clonic seizure and significantly decrease the total duration of tonic-clonic seizures caused by pentylenetetrazol administration. Also, electrocortical alterations provoked by pentylenetetrazol were prevented, significantly decreasing amplitude of discharges and frequencies above 50 Hz. EO was also able to completely prevent lipid peroxidation in the cerebral cortex, showing a potent direct scavenging property. These results demonstrate for the first time that E. oleracea significantly protects against seizures and seizu...
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Food Chemistry, 2015
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Separation and Purification Technology, 2007
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Separation and Purification Technology, 2007
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Açai is a very popular polyphenol-rich fruit juice in the Amazonian region. In order to evaluate ... more Açai is a very popular polyphenol-rich fruit juice in the Amazonian region. In order to evaluate its effects on blood oxidative level, 350 ml açai juice were added to the daily diet of 30 male volunteers (aged 41±8.9 years) during 28 days. Fasting blood samples were obtained by vein puncture on day 0, 10, 20 and 28 and LDLs were
Bookmarks Related papers MentionsView impact
Biomedicine & Pharmacotherapy, 2015
Copaifera spp oleoresins have been used in folk medicine for centuries; nevertheless, its immunom... more Copaifera spp oleoresins have been used in folk medicine for centuries; nevertheless, its immunomodulatory action has not been investigated. Thus, the goal of this study was to characterize different oleoresins and to verify their action on human monocytes regarding pro- and anti-inflammatory cytokine production (TNF-α and IL-10, respectively). The chemical composition of Brazilian Copaifera reticulata, Copaifera duckey and Copaifera multijuga oleoresins was analyzed by HPLC-MS. Cell viability was assessed by MTT method after incubation of cells with Copaifera spp. Noncytotoxic concentrations of oleoresins were incubated with human monocytes from healthy donors, and cytokine production was determined by ELISA. HPLC-MS analysis for terpenes allowed the identification of six diterpene acids and one sesquiterpene acid. Oleoresins exerted no cytotoxic effects on human monocytes. All oleoresins had a similar profile: LPS-induced TNF-α production was maintained by oleoresins, while a significant inhibitory action on IL-10 production was seen. Copaifera oleoresins seemed to exert an activator profile on human monocytes without affecting cell viability. Such effect may be due to the presence of either diterpene or sesquiterpene acids; however, further studies are necessary to determine the involvement of such compounds in Copaifera immunomodulatory effects.
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Journal of The Brazilian Chemical Society, 2007
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Food Chemistry, 2008
Many plants used in Amazonian folk medicine present a high antioxidant activity. In this study, t... more Many plants used in Amazonian folk medicine present a high antioxidant activity. In this study, the antioxidant activities of four largely used plants, namely Byrsonima crassifolia, Davilla kunthii, Davilla rugosa and Inga edulis, were evaluated, using methanolic extracts of their leaves, fruits and bark and several different in vitro tests, based either on the capacity to scavenge free radicals (ORAC,
Bookmarks Related papers MentionsView impact
Food Chemistry, 2015
In this study, detailed chemical properties of sim (Rhodomyrtus tomentosa (Ait.) Hassk.) fruit in... more In this study, detailed chemical properties of sim (Rhodomyrtus tomentosa (Ait.) Hassk.) fruit including nutritional composition, phenolic content and antioxidant capacity were determined for the first time. A 150g serving of sim fruit contained high levels of dietary fibre (69.94-87.43% of Recommended Daily Intake (RDI)), α-tocopherol (38.90-51.87% RDI), manganese (>100% RDI), and copper (44.44% RDI) but low levels of protein (2.63% RDI), lipid (1.59-3.5% RDI), and sugars (5.65% RDI). The predominant fatty acid in the sim fruit sample was linoleic acid (75.36% of total fatty acids). Interestingly, total phenolics (49.21±0.35mg gallic acid equivalent (GAE)/g dry weight (DW)) were particularly high and resulted in a high antioxidant capacity (431.17±14.56μmol Trolox equivalent (TE)/g DW). These results, together with our recent discovery of high amount of piceatannol, a stilbene with potent biological activities, highlight the potential of sim, an under-utilised plant species from South-East Asia, as a new source of health-promoting compounds including dietary fibres, essential fatty acids, and phenolic compounds.
Bookmarks Related papers MentionsView impact
Separation Science and Technology, 2010
The adsorption of five phenolic compounds of four different classes from aqueous batch solutions ... more The adsorption of five phenolic compounds of four different classes from aqueous batch solutions onto four styrene-divinylbenzene and acrylic resins (EXA 90, EXA 118, XAD 7, and XAD 16) was investigated regarding their equilibria, kinetics and surface-energy heterogeneity, and mechanisms of adsorption. The experimental equilibrium data were very well fitted to Langmuir and Freundlich models (R > 0.900). Three kinetic models
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Separation and Purification Technology, 2007
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Química Nova, 2010
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Journal of the Science of Food and Agriculture, 2007
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Journal of Food Science, 2012
The unavoidable damage of açai (Euterpe oleracea) fruits (AF) during picking leads to microbial c... more The unavoidable damage of açai (Euterpe oleracea) fruits (AF) during picking leads to microbial contamination and anthocyanin degradation, which prejudice the consumed fruit drink. Thirteen lots of AF (24 kg) from different municipal districts of the Pará State (Brazil) were monitored during a 75-h-long storage in the dark at 30 °C for microbial growth, and 7 lots for anthocyanin degradation. On arrival at the laboratory, anthocyanins presented a mean concentration of 828 mg kg(-1) fruits with a standard deviation of 323 mg kg(-1) fruits whereas mean microbial contamination was 2.64 10(6) CFU g(-1) of dry matter for total mesophilic bacteria, 1.98 10(3) MPN g(-1) DM for fecal coliforms, and 1.11 10(5) CFU g(-1) DM for moulds and yeasts. Kinetic growth of the microbes could be fitted to a quadratic equation with an unusual rapid growth during the 1st 24 h. The kinetics of anthocyanin degradation fitted a 1st-order equation. The mean velocity constant of the reaction (k(1)) was of 0.0137 h(-1) and the mean half-life (t(½)) of the anthocyanins was 50 h. These results indicate that the AF simultaneously suffer extensive anthocyanin degradation and explosive microbial growth during the postharvest period needing a special care.
Bookmarks Related papers MentionsView impact
Journal of Food Composition and Analysis, 2011
... such an accumulation profile is the sigmoidal model 54 (Woodward, 1972; Rogiers and Knowles, ... more ... such an accumulation profile is the sigmoidal model 54 (Woodward, 1972; Rogiers and Knowles, 1997; Fern ndez-L pez et al., 1999; Rivera-L pez ... (2009) investigated the accumulation of five anthocyanins during 157 ripening (25 33 days) of Prunus domestica ( Jojo , Valor , a ...
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