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Papers by Fernando Reboredo

Research paper thumbnail of The Fall of Oil Prices and the Effects on Biofuels

Trends in Biotechnology, 2016

Research paper thumbnail of Elemental Composition of Algae-Based Supplements by Energy Dispersive X-ray Fluorescence

Plants

The aim of this study is to evaluate the elemental composition of fifteen algae-based supplements... more The aim of this study is to evaluate the elemental composition of fifteen algae-based supplements commonly sold in the Portuguese market, by energy dispersive X-ray fluorescence. Despite the fact that the majority of Kelp samples were a good source of iodine, the levels observed might well contribute to an excess in the human body, which can cause dysfunction of the thyroid gland. Furthermore, the presence of lead in Sea spaghetti, Arame, Hijiki and Wakame caused a considerable risk to public health vis a vis possible ingestion of a high daily dose. Regarding arsenic, great variability was observed in all the samples with concentrations equal to or above 60 μg/g in the case of Arame, KelpJ and Hijiki. Although algae mainly accumulate organic arsenic, some also contain high levels of its inorganic form, as is commonly pointed out for Hijiki. Thus, regular ingestion of these supplements must also take into account the mentioned facts. There is no doubt that these supplements are also ...

Research paper thumbnail of Metal content in edible crops and agricultural soils due to intensive use of fertilizers and pesticides in Terras da Costa de Caparica (Portugal)

Environmental Science and Pollution Research

Soils and different vegetable species in Costa de Caparica (Portugal) are subject to the intensiv... more Soils and different vegetable species in Costa de Caparica (Portugal) are subject to the intensive use of inorganic fertilizers and pesticides. Thus, the concentrations of As, Cu, Fe, Mn, Pb, and Zn were evaluated. Lettuce, spinach, and potatoes collected in station 9 cause reason for concern due to their high Pb concentrations close to 20 μg g which is probably related to an intensive use of copper and iron sulphate fertilizers. Additionally, the consumption of Portulaca oleracea collected in stations 3 and 4 must be avoided due to the high concentrations of Zn, and even Cu. The derived estimated daily intake (EDI) dose of Zn will be a risk to human consumption if P. oleracea was the single basis of a soup, although the addition of other ingredients might lower the tolerable upper intake (TUI) value of 39 mg/day of P. oleracea, to admissible levels, i.e., not exceeding 25 mg/day. Pumpkin collected in station 1 contained 44.1 μg g Cu and a TUI value of 9.8 mg/day, when the recommendation must not exceed 5.0 mg/day. In this context, it is strongly advised to not include this vegetable in household menus.

Research paper thumbnail of Effect of Rice Grain (Oryza sativa L.) Enrichment with Selenium on Foliar Leaf Gas Exchanges and Accumulation of Nutrients

Plants

An agronomic itinerary for Se biofortification of two rice cultivars (Ariete and Ceres) through f... more An agronomic itinerary for Se biofortification of two rice cultivars (Ariete and Ceres) through foliar fertilization with sodium selenate and sodium selenite with different concentrations (25, 50, 75 and 100 g Se.ha−1), was implemented in experimental fields. The selenium toxicity threshold was not exceeded, as shown by the eco-physiological data obtained through leaf gas exchanges. The highest Se enrichment in paddy grains was obtained with selenite for both cultivars, especially at the highest doses, i.e., 75 and 100 g Se.ha−1, with approximately a 5.0-fold increase compared with control values. In paddy grains, Zn was the most affected element by the treatments with Se with decreases up to 54%. When comparing the losses between rough and polished grains regardless of the cultivars, Se species and concentrations, it was observed that only Cu, Mg and Zn exhibited losses <50%. The remaining elements generally had losses >70%. The loss of Se is more pronounced in Ceres cultivar...

Research paper thumbnail of Cadmium Uptake by : An Ecophysiological Study

Bull Environ Contam Toxicol, 2001

Research paper thumbnail of Trace metal content of live tissues in halimione portulacoides from coastal areas of the Sado estuary, Portugal

Http Dx Doi Org 10 1080 00207238408710136, Feb 24, 2007

ABSTRACT Large differences were noted in Al, Cu. Fe and Zn levels in live tissues of Halimione po... more ABSTRACT Large differences were noted in Al, Cu. Fe and Zn levels in live tissues of Halimione portulacoides from the coastal areas of the Sado estuary. The higest levels of Al. Cu and Fe were always found in roots, while the lowest levels were always observed in stems. Copper and iron levels were highly correlated in all tissues, specially Cu P &gt; 0.01), while for Al and Zn high correlations were noted between the leaf and the stem P &gt; 0.05).

Research paper thumbnail of Trace metal content of live tissues in halimione portulacoides from coastal areas of the Sado estuary, Portugal

International Journal of Environmental Studies, 1984

Large differences were noted in Al, Cu. Fe and Zn levels in live tissues of Halimione portulacoid... more Large differences were noted in Al, Cu. Fe and Zn levels in live tissues of Halimione portulacoides from the coastal areas of the Sado estuary. The higest levels of Al. Cu and Fe were always found in roots, while the lowest levels were always observed in stems. Copper and iron levels were highly correlated in all tissues, specially Cu P > 0.01), while for Al and Zn high correlations were noted between the leaf and the stem P > 0.05).

Research paper thumbnail of Cadmium Uptake by Halimione portulacoides : An Ecophysiological Study

Bulletin of Environmental Contamination and Toxicology, 2001

Research paper thumbnail of Nutritional profile of the Portuguese cabbage (Brassica oleracea L var. costata) and its relationship with the elemental soil analysis

Emirates Journal of Food and Agriculture, 2016

Research paper thumbnail of Interaction between copper and zinc and their uptake by Halimione portulacoides (L.) aellen

Bulletin of Environmental Contamination and Toxicology, May 1, 1994

The interaction between two heavy metals (essential or not) and the way it affects plant growth h... more The interaction between two heavy metals (essential or not) and the way it affects plant growth have been previously investigated. observed that an excess of Mn, Cu, Zn, Co and Ni reduced Fe uptake by barley plants and affected its distribution in roots and shoots. Polar and Kuqukcezzar (1986) verified a considerable Mn decrease in Lemna gibba (L.) fronds as a result of increasing concentrations of Cd in the culture medium.

Research paper thumbnail of Determination of Zinc, Iron and Aluminium in Halophytic Species of the River Sado Estuary—Portugal, by Atomic Absorption Spectrometry

Tasks for vegetation science, 1984

Research paper thumbnail of The Importance of Spartina maritima in the Recycling of Metals from a Polluted Area of River Sado Estuary, Portugal

Biomass Utilization, 1983

Research paper thumbnail of uptake by Halimione porrulacoides and Sparrina

Research paper thumbnail of Heavy Metal Content of Soil Salt Marsh from Coastal Areas of Sado Estuary-Portugal, by Atomic Absorption Spectrometry

Research paper thumbnail of Ultrastructural aspects of iron toxicity on Halimione portulacoides(L.) Aellen

Research paper thumbnail of A acumulacao de cadmio por Halimione portulacoides. Efeitos fisiologicos

Research paper thumbnail of Determinaçâo de metais pesados em sedimentos do estuario do rio Tejo por espectrofotometria de absorçao atomica por processo de chama e sem chama

Research paper thumbnail of Alguns aspectos sobre a acumulação de Fe, Cu e Zn por Halimione portulacoides (L.) Aellen

Research paper thumbnail of Forest Context and Policies in Portugal

Research paper thumbnail of Socio-economic, environmental, and governance impacts of illegal logging

Environment Systems and Decisions, 2013

This article examines the main impacts of the illegal logging activities with emphasis on the mos... more This article examines the main impacts of the illegal logging activities with emphasis on the most important timber production regions. Although the discussion is focused on the environmental, socio-economic and governance impacts, it must be stressed that the term forest governance is the umbrella where the economy, the environmental values, and welfare of forest-dependent communities are sheltered. Considering the effects/impacts of the illegal logging as a whole, we can summarize the following negative key points: (1) Degradation of the most valuable forest stands threatening biodiversity, including rare and endangered species. (2) Increase in soil erosion and landslides. Increase in CO 2 release and climatic changes. (3) Human rights abuses and disrespect of the basic needs of local communities and their culture. (4) Corruption, crime, coercion, and money laundering. (5) Reduction of royalties, taxes, and other charges paid by logging companies to the producer States. (6) Depreciation of legal activities due to the unfair concurrence. Despite multiple efforts, the results in the combat of illegal logging are far from satisfactory. Increase the certification area in parallel with an accurate control, devolve the state land to the ancient local owners, increase the cooperation between civil society and forest authorities, and finally strongly improve forest governance, particularly anti-money laundering laws, are crucial aspects in the combat of illegal logging. Furthermore, governments and businesses must implement the triple bottom line concept in order to reach sustainability.

Research paper thumbnail of The Fall of Oil Prices and the Effects on Biofuels

Trends in Biotechnology, 2016

Research paper thumbnail of Elemental Composition of Algae-Based Supplements by Energy Dispersive X-ray Fluorescence

Plants

The aim of this study is to evaluate the elemental composition of fifteen algae-based supplements... more The aim of this study is to evaluate the elemental composition of fifteen algae-based supplements commonly sold in the Portuguese market, by energy dispersive X-ray fluorescence. Despite the fact that the majority of Kelp samples were a good source of iodine, the levels observed might well contribute to an excess in the human body, which can cause dysfunction of the thyroid gland. Furthermore, the presence of lead in Sea spaghetti, Arame, Hijiki and Wakame caused a considerable risk to public health vis a vis possible ingestion of a high daily dose. Regarding arsenic, great variability was observed in all the samples with concentrations equal to or above 60 μg/g in the case of Arame, KelpJ and Hijiki. Although algae mainly accumulate organic arsenic, some also contain high levels of its inorganic form, as is commonly pointed out for Hijiki. Thus, regular ingestion of these supplements must also take into account the mentioned facts. There is no doubt that these supplements are also ...

Research paper thumbnail of Metal content in edible crops and agricultural soils due to intensive use of fertilizers and pesticides in Terras da Costa de Caparica (Portugal)

Environmental Science and Pollution Research

Soils and different vegetable species in Costa de Caparica (Portugal) are subject to the intensiv... more Soils and different vegetable species in Costa de Caparica (Portugal) are subject to the intensive use of inorganic fertilizers and pesticides. Thus, the concentrations of As, Cu, Fe, Mn, Pb, and Zn were evaluated. Lettuce, spinach, and potatoes collected in station 9 cause reason for concern due to their high Pb concentrations close to 20 μg g which is probably related to an intensive use of copper and iron sulphate fertilizers. Additionally, the consumption of Portulaca oleracea collected in stations 3 and 4 must be avoided due to the high concentrations of Zn, and even Cu. The derived estimated daily intake (EDI) dose of Zn will be a risk to human consumption if P. oleracea was the single basis of a soup, although the addition of other ingredients might lower the tolerable upper intake (TUI) value of 39 mg/day of P. oleracea, to admissible levels, i.e., not exceeding 25 mg/day. Pumpkin collected in station 1 contained 44.1 μg g Cu and a TUI value of 9.8 mg/day, when the recommendation must not exceed 5.0 mg/day. In this context, it is strongly advised to not include this vegetable in household menus.

Research paper thumbnail of Effect of Rice Grain (Oryza sativa L.) Enrichment with Selenium on Foliar Leaf Gas Exchanges and Accumulation of Nutrients

Plants

An agronomic itinerary for Se biofortification of two rice cultivars (Ariete and Ceres) through f... more An agronomic itinerary for Se biofortification of two rice cultivars (Ariete and Ceres) through foliar fertilization with sodium selenate and sodium selenite with different concentrations (25, 50, 75 and 100 g Se.ha−1), was implemented in experimental fields. The selenium toxicity threshold was not exceeded, as shown by the eco-physiological data obtained through leaf gas exchanges. The highest Se enrichment in paddy grains was obtained with selenite for both cultivars, especially at the highest doses, i.e., 75 and 100 g Se.ha−1, with approximately a 5.0-fold increase compared with control values. In paddy grains, Zn was the most affected element by the treatments with Se with decreases up to 54%. When comparing the losses between rough and polished grains regardless of the cultivars, Se species and concentrations, it was observed that only Cu, Mg and Zn exhibited losses <50%. The remaining elements generally had losses >70%. The loss of Se is more pronounced in Ceres cultivar...

Research paper thumbnail of Cadmium Uptake by : An Ecophysiological Study

Bull Environ Contam Toxicol, 2001

Research paper thumbnail of Trace metal content of live tissues in halimione portulacoides from coastal areas of the Sado estuary, Portugal

Http Dx Doi Org 10 1080 00207238408710136, Feb 24, 2007

ABSTRACT Large differences were noted in Al, Cu. Fe and Zn levels in live tissues of Halimione po... more ABSTRACT Large differences were noted in Al, Cu. Fe and Zn levels in live tissues of Halimione portulacoides from the coastal areas of the Sado estuary. The higest levels of Al. Cu and Fe were always found in roots, while the lowest levels were always observed in stems. Copper and iron levels were highly correlated in all tissues, specially Cu P &gt; 0.01), while for Al and Zn high correlations were noted between the leaf and the stem P &gt; 0.05).

Research paper thumbnail of Trace metal content of live tissues in halimione portulacoides from coastal areas of the Sado estuary, Portugal

International Journal of Environmental Studies, 1984

Large differences were noted in Al, Cu. Fe and Zn levels in live tissues of Halimione portulacoid... more Large differences were noted in Al, Cu. Fe and Zn levels in live tissues of Halimione portulacoides from the coastal areas of the Sado estuary. The higest levels of Al. Cu and Fe were always found in roots, while the lowest levels were always observed in stems. Copper and iron levels were highly correlated in all tissues, specially Cu P > 0.01), while for Al and Zn high correlations were noted between the leaf and the stem P > 0.05).

Research paper thumbnail of Cadmium Uptake by Halimione portulacoides : An Ecophysiological Study

Bulletin of Environmental Contamination and Toxicology, 2001

Research paper thumbnail of Nutritional profile of the Portuguese cabbage (Brassica oleracea L var. costata) and its relationship with the elemental soil analysis

Emirates Journal of Food and Agriculture, 2016

Research paper thumbnail of Interaction between copper and zinc and their uptake by Halimione portulacoides (L.) aellen

Bulletin of Environmental Contamination and Toxicology, May 1, 1994

The interaction between two heavy metals (essential or not) and the way it affects plant growth h... more The interaction between two heavy metals (essential or not) and the way it affects plant growth have been previously investigated. observed that an excess of Mn, Cu, Zn, Co and Ni reduced Fe uptake by barley plants and affected its distribution in roots and shoots. Polar and Kuqukcezzar (1986) verified a considerable Mn decrease in Lemna gibba (L.) fronds as a result of increasing concentrations of Cd in the culture medium.

Research paper thumbnail of Determination of Zinc, Iron and Aluminium in Halophytic Species of the River Sado Estuary—Portugal, by Atomic Absorption Spectrometry

Tasks for vegetation science, 1984

Research paper thumbnail of The Importance of Spartina maritima in the Recycling of Metals from a Polluted Area of River Sado Estuary, Portugal

Biomass Utilization, 1983

Research paper thumbnail of uptake by Halimione porrulacoides and Sparrina

Research paper thumbnail of Heavy Metal Content of Soil Salt Marsh from Coastal Areas of Sado Estuary-Portugal, by Atomic Absorption Spectrometry

Research paper thumbnail of Ultrastructural aspects of iron toxicity on Halimione portulacoides(L.) Aellen

Research paper thumbnail of A acumulacao de cadmio por Halimione portulacoides. Efeitos fisiologicos

Research paper thumbnail of Determinaçâo de metais pesados em sedimentos do estuario do rio Tejo por espectrofotometria de absorçao atomica por processo de chama e sem chama

Research paper thumbnail of Alguns aspectos sobre a acumulação de Fe, Cu e Zn por Halimione portulacoides (L.) Aellen

Research paper thumbnail of Forest Context and Policies in Portugal

Research paper thumbnail of Socio-economic, environmental, and governance impacts of illegal logging

Environment Systems and Decisions, 2013

This article examines the main impacts of the illegal logging activities with emphasis on the mos... more This article examines the main impacts of the illegal logging activities with emphasis on the most important timber production regions. Although the discussion is focused on the environmental, socio-economic and governance impacts, it must be stressed that the term forest governance is the umbrella where the economy, the environmental values, and welfare of forest-dependent communities are sheltered. Considering the effects/impacts of the illegal logging as a whole, we can summarize the following negative key points: (1) Degradation of the most valuable forest stands threatening biodiversity, including rare and endangered species. (2) Increase in soil erosion and landslides. Increase in CO 2 release and climatic changes. (3) Human rights abuses and disrespect of the basic needs of local communities and their culture. (4) Corruption, crime, coercion, and money laundering. (5) Reduction of royalties, taxes, and other charges paid by logging companies to the producer States. (6) Depreciation of legal activities due to the unfair concurrence. Despite multiple efforts, the results in the combat of illegal logging are far from satisfactory. Increase the certification area in parallel with an accurate control, devolve the state land to the ancient local owners, increase the cooperation between civil society and forest authorities, and finally strongly improve forest governance, particularly anti-money laundering laws, are crucial aspects in the combat of illegal logging. Furthermore, governments and businesses must implement the triple bottom line concept in order to reach sustainability.