Jonas Moreira - Academia.edu (original) (raw)

Papers by Jonas Moreira

Environmental Modelling and Software, 2005

An analytical technique to solve the Eulerian advection-diffusion equation for nonstationary cond... more An analytical technique to solve the Eulerian advection-diffusion equation for nonstationary conditions and passive contaminant within the Planetary Boundary Layer is analysed in this paper. The approach produces comparable results when considering the most important quantity in air-pollution application, that is the ground level concentration distribution. This is a promising result as this computer-based technique may be used for quantitative and qualitative estimations of contaminant distribution.

Physics Letters B, 2012

The production of muons from heavy flavour decays is measured at forward rapidity in proton-proto... more The production of muons from heavy flavour decays is measured at forward rapidity in proton-proton collisions at √ s = 7 TeV collected with the ALICE experiment at the LHC. The analysis is carried out on a data sample corresponding to an integrated luminosity L int = 16.5 nb −1 . The transverse momentum and rapidity differential production cross sections of muons from heavy flavour decays are measured in the rapidity range 2.5 < y < 4, over the transverse momentum range 2 < p t < 12 GeV/c. The results are compared to predictions based on perturbative QCD calculations.

Journal of Applied Oral Science, 2010

OBJECTIVE: This in situ study evaluated the discriminatory power and reliability of methods of de... more OBJECTIVE: This in situ study evaluated the discriminatory power and reliability of methods of dental plaque quantification and the relationship between visual indices (VI) and fluorescence camera (FC) to detect plaque. MATERIAL AND METHODS: Six volunteers used palatal appliances with six bovine enamel blocks presenting different stages of plaque accumulation. The presence of plaque with and without disclosing was assessed using VI. Images were obtained with FC and digital camera in both conditions. The area covered by plaque was assessed. Examinations were done by two independent examiners. Data were analyzed by Kruskal-Wallis and Kappa tests to compare different conditions of samples and to assess the inter-examiner reproducibility. RESULTS: Some methods presented adequate reproducibility. The Turesky index and the assessment of area covered by disclosed plaque in the FC images presented the highest discriminatory powers. CONCLUSION: The Turesky index and images with FC with disclosing present good reliability and discriminatory power in quantifying dental plaque.

Ecological Modelling, 2005

In this work we check the reability of an air pollution model to simulate within the planetary bo... more In this work we check the reability of an air pollution model to simulate within the planetary boundary layer (PBL) the concentration of radioactive material emitted from the nuclear power plant of Angra dos Reis. We used a dispersion model that employs a new analytical solution of the advection-diffusion equation. This solution for non-stationary and non-homogeneous conditions and radioactive contaminant is obtained by applying the Laplace transform, considering the PBL subdivided in N multilayers where the meteorological parameters can be considered constant. Given that the simulations are in a complex terrain, the analysis of the results shows a reasonably good agreement between the values computed by the model against the experimental ones.

Revista Dental Press De Ortodontia E Ortopedia Facial, 2006

AIM: the aim of this study was to evaluate the influence of acid conditioning time in porcelain s... more AIM: the aim of this study was to evaluate the influence of acid conditioning time in porcelain surface and its characteristics after debonding of orthodontic brackets. METHODS: twenty samples of feldspathic porcelain for enamel (Duceram-LFC) were divided in 2 groups according with the amount of time of acid conditioning with hydrofluoric acid 10% (15 seconds and 1 minute). After acid etching, it was applied silane (3M Scotchbond), adhesive (Optibond Solo Plus) and resin (Fill Magic) in these surfaces. The debonding was done with shear strength through a universal testing machine (DL 500 – EMIC) calibrated with a fixed speed of 0.5mm/minute. The adhesive remnant index (ARI) in the porcelain surfaces and their characteristics after removal of the brackets were evaluated through digital pictures. RESULTS: in the 15 seconds group, the mean bond strength was 3.63Mpa, significantly lower than the 1 minute group, that was 7.18Mpa (p<0.0001). All fractures during debonding were cohesive in the composite resin layer (70%) or bond between the bracket and the resin (30%). In relation to the ARI analysis, the Chi-square test showed no statistically significant difference between both groups. CONCLUSION: conditioning with hydrofluoric acid 10% for 1 minute, followed by the application of silane, adhesive and resin was considered the best porcelain preparation method before orthodontic bonding.

Journal of High Energy Physics, 2012

The p t -differential inclusive production cross sections of the prompt charmed mesons D 0 , D + ... more The p t -differential inclusive production cross sections of the prompt charmed mesons D 0 , D + , and D * + in the rapidity range |y| < 0.5 were measured in proton-proton collisions at √ s = 7 TeV at the LHC using the ALICE detector. Reconstructing the decays D 0 → K − π + , D + → K − π + π + , D * + → D 0 π + , and their charge conjugates, about 8,400 D 0 , 2,900 D + , and 2,600 D * + mesons with 1 < p t < 24 GeV/c were counted, after selection cuts, in a data sample of 3.14 × 10 8 events collected with a minimum-bias trigger (integrated luminosity L int = 5 nb −1 ). The results are described within uncertainties by predictions based on perturbative QCD.

Atmospheric Environment, 2005

The present study proposes a steady-state mathematical model for dispersion of contaminants in lo... more The present study proposes a steady-state mathematical model for dispersion of contaminants in low winds that takes into account the along-wind diffusion. The solution of the advection-diffusion equation for these conditions is obtained applying the Laplace transform, considering the planetary boundary layer as a multilayer system. The eddy diffusivities used in the K-diffusion model were derived from the local similarity and Taylor's diffusion theory. The eddy diffusivities are functions of distance from the source and correctly represent the near-source diffusion in weak winds. The performances of the model were evaluated against the field experiments carried out at the Idaho National Engineering Laboratory and during the convective conditions at the Indian Institute of Technology. Furthermore, the study suggests that the inclusion of the longitudinal diffusion, important at short distance diffusion from a continuous point source in low wind conditions, can improve the description of the turbulent transport of atmospheric contaminants. r

Environmental Modelling and Software, 2005

Atmospheric air pollution turbulent fluxes can be assumed to be proportional to the mean concentr... more Atmospheric air pollution turbulent fluxes can be assumed to be proportional to the mean concentration gradient. This assumption, along with the equation of continuity, leads to the advection-diffusion equation. Moreover, large eddies are able to mix scalar quantities in a manner that is counter to the local gradient. We present a general solution of a two-dimension steady state advection-diffusion equation, considering non-local turbulence closure using the General Integral Laplace Transform Technique. We show some examples of applications of the new solution with different vertical diffusion parameterisations.

Atmospheric Environment, 2004

A general formulation for eddy diffusivities has been derived for use in atmospheric dispersion m... more A general formulation for eddy diffusivities has been derived for use in atmospheric dispersion models. Expressions of eddy diffusivities for inhomogeneous turbulence are proposed, which are calculated directly with the Batchelor theory and can consider nonstationary spectrum important in turbulence decay. A statistical evaluation shows that the results of an air pollution model, with the K-parameterisation included, produces a good fit of the measured groundlevel concentration data in the experimental conditions considered. r

Physiologia Plantarum, 2007

Chitinases (EC 3.2.1.14) are hydrolytic enzymes found in different organisms. In plants, they hav... more Chitinases (EC 3.2.1.14) are hydrolytic enzymes found in different organisms. In plants, they have been described in different tissues and organs, including seeds. This study was triggered by the isolation of a 30-kDa thermostable chitinase from Adenanthera pavonina L. seeds. The enzyme was submitted to N-terminal amino acid sequencing, and the analysis revealed a high degree of homology with class III chitinases. Bidimensional electrophoresis of the 30-kDa band showed the presence of three isoforms with pIs of 5.2, 5.5 and 5.8. A chitinase was also found in exudates released from the same seeds, which was seen to be immunorelated to the above 30-kDa protein. It was also submitted to N-terminal amino acid sequencing and seen as highly homologous to class III chitinases. In addition, the expression of chitinases during A. pavonina L. seed germination and seedling development was investigated. Seeds were allowed to germinate in the absence of light for approximately 5 days and were grown, for different times, in the absence or presence of light. After each seedling developmental time, samples of exudates, roots and cotyledonary leaves were collected and submitted to protein extraction. The presence of proteins immunorelated to the 30-kDa chitinase was detected in all analyzed samples. Further analyses showed that light significantly interfered with the chitinase expression in some organs. The tissue and subcellular chitinase location in seedling roots was also investigated, and it was majorly localized in the cell wall and in the intercellular spaces of the root hair zone.

Environmental Modelling and Software, 2005

An analytical technique to solve the Eulerian advection-diffusion equation for nonstationary cond... more An analytical technique to solve the Eulerian advection-diffusion equation for nonstationary conditions and passive contaminant within the Planetary Boundary Layer is analysed in this paper. The approach produces comparable results when considering the most important quantity in air-pollution application, that is the ground level concentration distribution. This is a promising result as this computer-based technique may be used for quantitative and qualitative estimations of contaminant distribution.

Physics Letters B, 2012

The production of muons from heavy flavour decays is measured at forward rapidity in proton-proto... more The production of muons from heavy flavour decays is measured at forward rapidity in proton-proton collisions at √ s = 7 TeV collected with the ALICE experiment at the LHC. The analysis is carried out on a data sample corresponding to an integrated luminosity L int = 16.5 nb −1 . The transverse momentum and rapidity differential production cross sections of muons from heavy flavour decays are measured in the rapidity range 2.5 < y < 4, over the transverse momentum range 2 < p t < 12 GeV/c. The results are compared to predictions based on perturbative QCD calculations.

Journal of Applied Oral Science, 2010

OBJECTIVE: This in situ study evaluated the discriminatory power and reliability of methods of de... more OBJECTIVE: This in situ study evaluated the discriminatory power and reliability of methods of dental plaque quantification and the relationship between visual indices (VI) and fluorescence camera (FC) to detect plaque. MATERIAL AND METHODS: Six volunteers used palatal appliances with six bovine enamel blocks presenting different stages of plaque accumulation. The presence of plaque with and without disclosing was assessed using VI. Images were obtained with FC and digital camera in both conditions. The area covered by plaque was assessed. Examinations were done by two independent examiners. Data were analyzed by Kruskal-Wallis and Kappa tests to compare different conditions of samples and to assess the inter-examiner reproducibility. RESULTS: Some methods presented adequate reproducibility. The Turesky index and the assessment of area covered by disclosed plaque in the FC images presented the highest discriminatory powers. CONCLUSION: The Turesky index and images with FC with disclosing present good reliability and discriminatory power in quantifying dental plaque.

Ecological Modelling, 2005

In this work we check the reability of an air pollution model to simulate within the planetary bo... more In this work we check the reability of an air pollution model to simulate within the planetary boundary layer (PBL) the concentration of radioactive material emitted from the nuclear power plant of Angra dos Reis. We used a dispersion model that employs a new analytical solution of the advection-diffusion equation. This solution for non-stationary and non-homogeneous conditions and radioactive contaminant is obtained by applying the Laplace transform, considering the PBL subdivided in N multilayers where the meteorological parameters can be considered constant. Given that the simulations are in a complex terrain, the analysis of the results shows a reasonably good agreement between the values computed by the model against the experimental ones.

Revista Dental Press De Ortodontia E Ortopedia Facial, 2006

AIM: the aim of this study was to evaluate the influence of acid conditioning time in porcelain s... more AIM: the aim of this study was to evaluate the influence of acid conditioning time in porcelain surface and its characteristics after debonding of orthodontic brackets. METHODS: twenty samples of feldspathic porcelain for enamel (Duceram-LFC) were divided in 2 groups according with the amount of time of acid conditioning with hydrofluoric acid 10% (15 seconds and 1 minute). After acid etching, it was applied silane (3M Scotchbond), adhesive (Optibond Solo Plus) and resin (Fill Magic) in these surfaces. The debonding was done with shear strength through a universal testing machine (DL 500 – EMIC) calibrated with a fixed speed of 0.5mm/minute. The adhesive remnant index (ARI) in the porcelain surfaces and their characteristics after removal of the brackets were evaluated through digital pictures. RESULTS: in the 15 seconds group, the mean bond strength was 3.63Mpa, significantly lower than the 1 minute group, that was 7.18Mpa (p<0.0001). All fractures during debonding were cohesive in the composite resin layer (70%) or bond between the bracket and the resin (30%). In relation to the ARI analysis, the Chi-square test showed no statistically significant difference between both groups. CONCLUSION: conditioning with hydrofluoric acid 10% for 1 minute, followed by the application of silane, adhesive and resin was considered the best porcelain preparation method before orthodontic bonding.

Journal of High Energy Physics, 2012

The p t -differential inclusive production cross sections of the prompt charmed mesons D 0 , D + ... more The p t -differential inclusive production cross sections of the prompt charmed mesons D 0 , D + , and D * + in the rapidity range |y| < 0.5 were measured in proton-proton collisions at √ s = 7 TeV at the LHC using the ALICE detector. Reconstructing the decays D 0 → K − π + , D + → K − π + π + , D * + → D 0 π + , and their charge conjugates, about 8,400 D 0 , 2,900 D + , and 2,600 D * + mesons with 1 < p t < 24 GeV/c were counted, after selection cuts, in a data sample of 3.14 × 10 8 events collected with a minimum-bias trigger (integrated luminosity L int = 5 nb −1 ). The results are described within uncertainties by predictions based on perturbative QCD.

Atmospheric Environment, 2005

The present study proposes a steady-state mathematical model for dispersion of contaminants in lo... more The present study proposes a steady-state mathematical model for dispersion of contaminants in low winds that takes into account the along-wind diffusion. The solution of the advection-diffusion equation for these conditions is obtained applying the Laplace transform, considering the planetary boundary layer as a multilayer system. The eddy diffusivities used in the K-diffusion model were derived from the local similarity and Taylor's diffusion theory. The eddy diffusivities are functions of distance from the source and correctly represent the near-source diffusion in weak winds. The performances of the model were evaluated against the field experiments carried out at the Idaho National Engineering Laboratory and during the convective conditions at the Indian Institute of Technology. Furthermore, the study suggests that the inclusion of the longitudinal diffusion, important at short distance diffusion from a continuous point source in low wind conditions, can improve the description of the turbulent transport of atmospheric contaminants. r

Environmental Modelling and Software, 2005

Atmospheric air pollution turbulent fluxes can be assumed to be proportional to the mean concentr... more Atmospheric air pollution turbulent fluxes can be assumed to be proportional to the mean concentration gradient. This assumption, along with the equation of continuity, leads to the advection-diffusion equation. Moreover, large eddies are able to mix scalar quantities in a manner that is counter to the local gradient. We present a general solution of a two-dimension steady state advection-diffusion equation, considering non-local turbulence closure using the General Integral Laplace Transform Technique. We show some examples of applications of the new solution with different vertical diffusion parameterisations.

Atmospheric Environment, 2004

A general formulation for eddy diffusivities has been derived for use in atmospheric dispersion m... more A general formulation for eddy diffusivities has been derived for use in atmospheric dispersion models. Expressions of eddy diffusivities for inhomogeneous turbulence are proposed, which are calculated directly with the Batchelor theory and can consider nonstationary spectrum important in turbulence decay. A statistical evaluation shows that the results of an air pollution model, with the K-parameterisation included, produces a good fit of the measured groundlevel concentration data in the experimental conditions considered. r

Physiologia Plantarum, 2007

Chitinases (EC 3.2.1.14) are hydrolytic enzymes found in different organisms. In plants, they hav... more Chitinases (EC 3.2.1.14) are hydrolytic enzymes found in different organisms. In plants, they have been described in different tissues and organs, including seeds. This study was triggered by the isolation of a 30-kDa thermostable chitinase from Adenanthera pavonina L. seeds. The enzyme was submitted to N-terminal amino acid sequencing, and the analysis revealed a high degree of homology with class III chitinases. Bidimensional electrophoresis of the 30-kDa band showed the presence of three isoforms with pIs of 5.2, 5.5 and 5.8. A chitinase was also found in exudates released from the same seeds, which was seen to be immunorelated to the above 30-kDa protein. It was also submitted to N-terminal amino acid sequencing and seen as highly homologous to class III chitinases. In addition, the expression of chitinases during A. pavonina L. seed germination and seedling development was investigated. Seeds were allowed to germinate in the absence of light for approximately 5 days and were grown, for different times, in the absence or presence of light. After each seedling developmental time, samples of exudates, roots and cotyledonary leaves were collected and submitted to protein extraction. The presence of proteins immunorelated to the 30-kDa chitinase was detected in all analyzed samples. Further analyses showed that light significantly interfered with the chitinase expression in some organs. The tissue and subcellular chitinase location in seedling roots was also investigated, and it was majorly localized in the cell wall and in the intercellular spaces of the root hair zone.