Augusto Fagundes | Faculdade Independente do Nordeste - FAINOR (original) (raw)

Augusto Fagundes

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Papers by Augusto Fagundes

Research paper thumbnail of Avaliação dos parâmetros de turbulência em fluxos de metano para uma área de arroz irrigado no sul do Brasil

Ciência e Natura, Aug 28, 2020

<jats:p>Methane (CH4) is one of the main greenhouse gases. An important source of CH4 emiss... more <jats:p>Methane (CH4) is one of the main greenhouse gases. An important source of CH4 emission is flooded rice paddy. In this paper, the Eddy Covariance methodology was used to estimate the surface fluxes of CH4 in a flooded rice paddy in the Southern Brazil (lat: -30.2771 N; long: -53.1479 W; altitude - 40.5 m). In the event of low turbulence, this method can generate unrealistic flux data. In this situation, it is recommended remove the flux of the dataset. In general, the friction velocity (u*) is used to remove CH4 flux in low turbulence situations. However, u* is a flux and the use of the standard deviation of vertical velocity fluctuations (σw) can be an alternative. The objective of this work is to analyze the behavior of CH4 flux with friction velocity (u*), with the standard deviation of vertical velocity fluctuations (σw), and with atmospheric and soil variables in a flooded rice paddy.</jats:p>

Research paper thumbnail of Metodologia para a equalização de dispositivos armazenadores de energia e gerenciamento de microrredes CC

Research paper thumbnail of Análise das propriedades físicas de tijolo ecológico com incorporação de cinzas de secadores de grãos

Research paper thumbnail of Estudo das técnicas de preenchimento para dados de fluxo de metano em uma área de arroz irrigado por inundação

Ciência e Natura, 2018

Studies on the emission of methane gas (CH4) in agricultural ecosystems have received attention f... more Studies on the emission of methane gas (CH4) in agricultural ecosystems have received attention from the scientific communitybecause it plays an important role in the greenhouse effect. Flood irrigation agriculture, such as irrigated rice, represents aconsiderable source of methane emissions (from 12 to 26 percent of all anthropogenic CH4 emissions in the world). Estimates ofCH4 emissions have also been performed through the eddy covariance technique. Although this methodology makes continuousmeasurements of methane exchanges between the ecosystem and the atmosphere, failure to collect data can occur because thesystem is quite sensitive, especially in the hard weather conditions. The gap filling in the methane data are essential to obtaina daily or seasonal quantification of the emissions. In this study, different gap filling techniques are used to fill the CH4 fluxesobtained by eddy covariance technique in an irrigated rice crop. The experimental data were obtained in Cachoeira do ...

Research paper thumbnail of Purification of angiotensin I-converting enzyme (ACE) inhibitory peptides from casein hydrolysate by IMAC-Ni2+

Amino Acids, 2017

Casein proteins were hydrolyzed by papain to identify inhibitory peptides of angiotensin I-conver... more Casein proteins were hydrolyzed by papain to identify inhibitory peptides of angiotensin I-converting enzyme (ACE). The hydrolysate was fractionized by immobilized metal affinity chromatography (IMAC-Ni). The fraction with high ACE inhibitory activity was enriched and further chromatographed on a reverse-phase column to yield four fractions. Among the fractions, the L4 fraction exhibited the highest ACE inhibitory activity and was identified by sequence analysis as Trp-Tyr-Leu-His-Tyr-Ala (WYLHYA), with IC value of 16.22 ± 0.83 µM in vitro. This peptide was expected to be applied as an ingredient for preventing hypertension and IMAC-Ni may provide a simple method for purification of ACE inhibitory peptides.

Research paper thumbnail of Estudo de alguns fatores na gênese do tabagismo

Rev Hcpa Fac Med Univ Fed Rio Gd Do Sul, Aug 1, 1988

Research paper thumbnail of Análise da estratégia de contratação de consumidores livres, tendo como balizamento a formação de preços no mercado cativo

Research paper thumbnail of Comportamento Do Fluxo De Energia Em Eventos De Geada

Research paper thumbnail of Evaluation of turbulence parameters in methane fluxes for an irrigated rice paddy

Methane (CH 4 ) is one of the main greenhouse gases. An important source of CH 4 emission is floo... more Methane (CH 4 ) is one of the main greenhouse gases. An important source of CH 4 emission is flooded rice paddy. In this paper, the Eddy Covariance methodology was used to estimate the surface fluxes of CH 4 in a flooded rice paddy in the Southern Brazil (lat: -30.2771 N; long: -53.1479 W; altitude - 40.5 m). In the event of low turbulence, this method can generate unrealistic flux data. In this situation, it is recommended remove the flux of the dataset. In general, the friction velocity (u*) is used to remove CH 4 flux in low turbulence situations. However, u* is a flux and the use of the standard deviation of vertical velocity fluctuations (σ w ) can be an alternative. The objective of this work is to analyze the behavior of CH 4 flux with friction velocity (u*), with the standard deviation of vertical velocity fluctuations (σ w ), and with atmospheric and soil variables in a flooded rice paddy.

Research paper thumbnail of Avaliação dos parâmetros de turbulência em fluxos de metano para uma área de arroz irrigado no sul do Brasil

Ciência e Natura, Aug 28, 2020

<jats:p>Methane (CH4) is one of the main greenhouse gases. An important source of CH4 emiss... more <jats:p>Methane (CH4) is one of the main greenhouse gases. An important source of CH4 emission is flooded rice paddy. In this paper, the Eddy Covariance methodology was used to estimate the surface fluxes of CH4 in a flooded rice paddy in the Southern Brazil (lat: -30.2771 N; long: -53.1479 W; altitude - 40.5 m). In the event of low turbulence, this method can generate unrealistic flux data. In this situation, it is recommended remove the flux of the dataset. In general, the friction velocity (u*) is used to remove CH4 flux in low turbulence situations. However, u* is a flux and the use of the standard deviation of vertical velocity fluctuations (σw) can be an alternative. The objective of this work is to analyze the behavior of CH4 flux with friction velocity (u*), with the standard deviation of vertical velocity fluctuations (σw), and with atmospheric and soil variables in a flooded rice paddy.</jats:p>

Research paper thumbnail of Metodologia para a equalização de dispositivos armazenadores de energia e gerenciamento de microrredes CC

Research paper thumbnail of Análise das propriedades físicas de tijolo ecológico com incorporação de cinzas de secadores de grãos

Research paper thumbnail of Estudo das técnicas de preenchimento para dados de fluxo de metano em uma área de arroz irrigado por inundação

Ciência e Natura, 2018

Studies on the emission of methane gas (CH4) in agricultural ecosystems have received attention f... more Studies on the emission of methane gas (CH4) in agricultural ecosystems have received attention from the scientific communitybecause it plays an important role in the greenhouse effect. Flood irrigation agriculture, such as irrigated rice, represents aconsiderable source of methane emissions (from 12 to 26 percent of all anthropogenic CH4 emissions in the world). Estimates ofCH4 emissions have also been performed through the eddy covariance technique. Although this methodology makes continuousmeasurements of methane exchanges between the ecosystem and the atmosphere, failure to collect data can occur because thesystem is quite sensitive, especially in the hard weather conditions. The gap filling in the methane data are essential to obtaina daily or seasonal quantification of the emissions. In this study, different gap filling techniques are used to fill the CH4 fluxesobtained by eddy covariance technique in an irrigated rice crop. The experimental data were obtained in Cachoeira do ...

Research paper thumbnail of Purification of angiotensin I-converting enzyme (ACE) inhibitory peptides from casein hydrolysate by IMAC-Ni2+

Amino Acids, 2017

Casein proteins were hydrolyzed by papain to identify inhibitory peptides of angiotensin I-conver... more Casein proteins were hydrolyzed by papain to identify inhibitory peptides of angiotensin I-converting enzyme (ACE). The hydrolysate was fractionized by immobilized metal affinity chromatography (IMAC-Ni). The fraction with high ACE inhibitory activity was enriched and further chromatographed on a reverse-phase column to yield four fractions. Among the fractions, the L4 fraction exhibited the highest ACE inhibitory activity and was identified by sequence analysis as Trp-Tyr-Leu-His-Tyr-Ala (WYLHYA), with IC value of 16.22 ± 0.83 µM in vitro. This peptide was expected to be applied as an ingredient for preventing hypertension and IMAC-Ni may provide a simple method for purification of ACE inhibitory peptides.

Research paper thumbnail of Estudo de alguns fatores na gênese do tabagismo

Rev Hcpa Fac Med Univ Fed Rio Gd Do Sul, Aug 1, 1988

Research paper thumbnail of Análise da estratégia de contratação de consumidores livres, tendo como balizamento a formação de preços no mercado cativo

Research paper thumbnail of Comportamento Do Fluxo De Energia Em Eventos De Geada

Research paper thumbnail of Evaluation of turbulence parameters in methane fluxes for an irrigated rice paddy

Methane (CH 4 ) is one of the main greenhouse gases. An important source of CH 4 emission is floo... more Methane (CH 4 ) is one of the main greenhouse gases. An important source of CH 4 emission is flooded rice paddy. In this paper, the Eddy Covariance methodology was used to estimate the surface fluxes of CH 4 in a flooded rice paddy in the Southern Brazil (lat: -30.2771 N; long: -53.1479 W; altitude - 40.5 m). In the event of low turbulence, this method can generate unrealistic flux data. In this situation, it is recommended remove the flux of the dataset. In general, the friction velocity (u*) is used to remove CH 4 flux in low turbulence situations. However, u* is a flux and the use of the standard deviation of vertical velocity fluctuations (σ w ) can be an alternative. The objective of this work is to analyze the behavior of CH 4 flux with friction velocity (u*), with the standard deviation of vertical velocity fluctuations (σ w ), and with atmospheric and soil variables in a flooded rice paddy.

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