Rafael Alves | Universidade Federal de Goiás (original) (raw)

Papers by Rafael Alves

This study investigates the relation between anthropometric and functional characteristics of juv... more This study investigates the relation between anthropometric and functional characteristics of juvenile/infantile categories and their results at the State Optimist Class Sailing Championship of 2006 held in Rio de Janeiro. A group of 50 male sailors of both categories were evaluated. The juvenile category presented superior height, as expected, and a lower fat percentage in relation to the infantile category,

Advances in Applied Clifford Algebras, 2015

ABSTRACT Nuclear Magnetic Resonance experiments can provide distances between pairs of atoms of a... more ABSTRACT Nuclear Magnetic Resonance experiments can provide distances between pairs of atoms of a protein that are close enough and the problem is how to determine the 3D protein structure based on this partial distance information, called Molecular Distance Geometry Problem. It is possible to define an atomic order 1, ..., n and solve the problem iteratively using an exact method, called Branch-and-Prune (BP). The main step of BP algorithm is to solve a quadratic system to get the two possible positions for i, i > 3, in terms of the positions of i−3, i−2, i−1 and the distances d i−1, i , d i−2, i , d i−3, i . Because of uncertainty in NMR data, some of the distances d i−3, i may not be precise and the main problem to apply BP is related to the difficulty of obtaining an analytical expression of the position of atom i in terms of the positions of the three previous ones and the corresponding distances. We present such expression and although it is similar to one already existing in the literature, based on polyspherical coordinates, a new proof is given, based on Clifford algebra, and we also explain how such expression can be useful in BP using a parameterization which depends on d i−3, i . The results suggest that a master equation might exist, what is generally not believed by many researchers.

BMC Bioinformatics, 2014

Background: The determination of protein structures satisfying distance constraints is an importa... more Background: The determination of protein structures satisfying distance constraints is an important problem in structural biology. Whereas the most common method currently employed is simulated annealing, there have been other methods previously proposed in the literature. Most of them, however, are designed to find one solution only.

. Grover’s algorithm is a quantum algorithm for searching in unstructured databases which provid... more . Grover’s algorithm is a quantum algorithm for searching in unstructured databases which provides a quadratic speedup over their classical counterparts. We propose to use Clifford algebra in order to present a new way to describe the operators of Grover’s algorithm and to simplify the calculation of its computational complexity.

Ciência Rural, 2004

A presente investigação foi realizada devido à escassez, no Brasil, de informações sobre os possí... more A presente investigação foi realizada devido à escassez, no Brasil, de informações sobre os possíveis danos decorrentes da ação hematófaga da mosca-dos-chifres, Haematobia irritans (L.), em bovinos da raça Nelore. O estudo foi realizado durante quatro estações chuvosas (outubro a abril), de 1991 a 1995. Em cada ano, 80 bovinos foram utilizados de acordo com os seguintes tratamentos: 28 touros com um ano de idade divididos em quatro grupos; 20 bois com idade de dois anos divididos em quatro grupos, e 32 bois com três anos e divididos em oito grupos. Metade dos grupos de animais de cada idade eram tratados contra H. irritans com intervalos de 28 dias e os demais mantidos como grupos controle. As moscas foram contadas a cada 14 dias e o peso dos bois registrado a cada 28. O número médio de mosca/animal dos grupos controle para o primeiro, segundo, terceiro e quarto anos do estudo foi, respectivamente: cinco, cinco, quatro e cinco, nos animais de um ano; 15, 11, 13 e 27, nos de dois anos e 55, 31, 40 e 51, nos de três anos. Observou-se que maior número de moscas (P<0,05) atacou os animais mais velhos. Houve, em todos os períodos de avaliação, apesar do número de moscas por animal poder ser considerado baixo, um ganho de peso significativo (P<0,05) em prol dos grupos tratados contra H. irritans comparativamente aos grupos não tratados. Os ganhos foram 8,6; 16,0 e 10,4% superiores, respectivamente, para animais de um, dois e três anos de idade. Esse ganho de peso por animal e por ano foi da ordem de 9, 5, 7 e 8 kg para os animais com um ano de idade; de 26, 10, 23 e 12 kg para aqueles de dois anos, e de 16, 8, 9 e 11 kg nos de três anos. ABSTRACT This investigation was carried out due the lack of information about the possible effects of the blood-feeding horn fly, Haematobia irritans (L.), on Nellore cattle. Data were recorded during four rainy seasons (October to April) from 1991 to 1995. In each year, 80 animals were utilized according to the following treatments: twenty-eight 1

Pesquisa Agropecuária Brasileira, 2000

SIDALC - Servicio de Informacion y Documentacion Agropecuaria de las Americas.

Pesquisa Veterinária Brasileira, 2002

Page 1. Pesq. Vet. Bras. 22(3):109-113, jul./set. 2002 109 RESUMO.- Estudaram-se o comportamentos... more Page 1. Pesq. Vet. Bras. 22(3):109-113, jul./set. 2002 109 RESUMO.- Estudaram-se o comportamentos e os danos cau-sados pela mosca-dos-chifres em vacas e bezerros Nelore an-tes da desmama. Foram utilizados dois ...

Pesquisa Agropecuária Brasileira, 2000

RESUMO -Este estudo avaliou o efeito do tamanho do folículo na capacidade dos ovócitos de sofrere... more RESUMO -Este estudo avaliou o efeito do tamanho do folículo na capacidade dos ovócitos de sofrerem maturação nuclear e citoplasmática. Ovários de vacas Nelore (Bos indicus) foram coletados logo após o abate, e os complexos cúmulus-ovócitos foram aspirados de folículos de diferentes categorias, e classificados de acordo com seus diâmetros em: 1-2 mm, 3-5 mm, 6-8 mm e ≥9 mm. A medida do diâmetro e a fixação dos ovócitos para avaliação do estádio nuclear antes da maturação foram feitas logo após a aspiração. Ovócitos morfologicamente viáveis foram maturados, fecundados e cultivados in vitro. Os ovócitos obtidos de folículos de 1-2 mm apresentaram menor diâmetro (P<0,01) do que os dos demais grupos. Antes da maturação, 89,8%, 90,1%, 85,7% e 100% dos ovócitos provenientes de folículos de 1-2, 3-5, 6-8 e ≥9 mm de diâmetro, respectivamente, apresentavam vesícula germinativa. O tamanho do folículo não influenciou (P<0,05) a taxa de maturação nuclear. A porcentagem de ovócitos que chegaram a metáfase II foi de 88,8%, 87,8%, 92,9% e 100% no que se refere aos ovócitos de folículos de 1-2, 3-5, 6-8 e ≥9 mm, respectivamente. As taxas de penetração e clivagem foram semelhantes (P>0,05) nos grupos de 1-2 mm (93,4% e 81,9%), 3-5 mm (90,7% e 79,6%), 6-8 mm (91,3% e 77,8%) e ≥9 mm (92,0% e 78,3%). Da mesma forma, não houve diferenças (P>0,05) entre as categorias de folículos no que se refere às taxas de polispermia, descondensação da cabeça do espermatozóide e formação de pronúcleos. Os resultados deste estudo demonstram que na espécie B. indicus, folículos com diâmetro de 1 mm até ≥9 mm não influenciaram a capacidade dos ovócitos de reiniciar e completar a meiose e de clivar após maturação e fecundação in vitro.

Ambiente e Agua - An Interdisciplinary Journal of Applied Science, 2007

Ambiente e Água - An Interdisciplinary Journal of Applied Science Universidade de Taubaté ambi-ag... more Ambiente e Água - An Interdisciplinary Journal of Applied Science Universidade de Taubaté ambi-agua@agro.unitau.br ISSN (Versión impresa): 1980-993X BRASIL ... 2007 Rafael Figueiredo Alves / Herly Carlos Teixeira Dias / José Carlos de Oliveira / Franklin Nicolai Mota Garcia ...

abepro.org.br

Over the last decades, several industries, such as the automotive, the aviation, the pharmaceutic... more Over the last decades, several industries, such as the automotive, the aviation, the pharmaceutical, and the civil construction, among others, have gone through processes aimed to improve the quality of their products. The software industry has also followed the same trend, motivated by the globalization of services, facilitated by the Internet explosion, and a stronger presence of the emergent countries in software production, such as India. This has made the software-producing companies seek for mechanisms that guarantee the quality of all processes involved in the creation and maintenance of their products. The ISO (International Standardization Organization) 9000 Series Standards, and the CMM model (Capability Maturity Model) developed by SEI (Software Engineering Institute), offer reliable standards to achieve quality software products.

ACS applied materials & interfaces, Jan 6, 2015

In this paper, a simple but powerful method for controlling the size and surface morphology of Ag... more In this paper, a simple but powerful method for controlling the size and surface morphology of AgAu nanodendrites is presented. Control of the number of Ag nanoparticle seeds is found to provide a fast and effective route by which to manipulate the size and morphology of nanoparticles produced via a combined galvanic replacement and reduction reaction. A lower number of Ag nanoparticle seeds leads to larger nanodendrites with the particles' outer diameter being tunable in the range of 45 to 148 nm. The size and surface morphology of the nanodendrites was found to directly affect their catalytic activity. Specifically, we report on the activity of these AgAu nanodendrites in catalyzing the gas-phase oxidation of benzene, toluene and o-xylene (BTX), which is an important reaction for the removal of these toxic compounds from fuels and for environmental remediation. All nanodendrite particles produced were found to be catalytically active, even at low temperatures and low metal loa...

Chemistry (Weinheim an der Bergstrasse, Germany), Jan 24, 2015

Bimetallic Tadpoles. New AgAu tadpoles have been synthesized in a one-step reaction involving gal... more Bimetallic Tadpoles. New AgAu tadpoles have been synthesized in a one-step reaction involving galvanic replacement between Ag nanospheres and AuCl4 (-) (aq.) in the presence of citrate. In their Full Paper on page 12314 ff., S. J. Haigh, P. H. C. Camargo and colleagues report how the tadpoles display nodular polycrystalline hollow heads while their undulating tails were single-crystalline, in agreement with an oriented attachment growth mechanism (top image). Remarkably, a 1 nm thick Ag layer (shown in red, bottom image) is found to segregate so as to cover the entire surface of the tadpoles (Au is shown in green).

Pesquisa Agropecuaria Brasileira, 1982

EURICO PINHEIRO2 e JOMAR DA PAES PEREIRA 4 RESUMO -Foi estudado o desempenho dos clones de sering... more EURICO PINHEIRO2 e JOMAR DA PAES PEREIRA 4 RESUMO -Foi estudado o desempenho dos clones de seringueira (Hevea sp): LAN 717, lAN 873, lAN 3087, lAN 2880, LAN 2388, lAN 4082, Fx 3899, Fx 3864,Fx 3846 e Fx 3810, nas condições ecológicas de Tracuateua, PÁ, Decorridos oito anos da instalação do experimento, os clones que apresentam melhor desenvolvimento vegetativo são: Fx 3810, LAN 717 e lAN 3087. Destes destaca-se o clone Px 3810 com 73% das plantas em condições de sangria. Termos para indexação:Microcylus ulei, competição de clones, desenvolvimento vegetativo,Hevea sp BEHAVIOUR OF SOME AMAZONIAN CLONES OF RUBBER TREE IN TRACUATEUA ABSTRACT -The performance of the rubber tree clones (Hevea sp.) lAN 717, lAN 873, lAN 2880, lAN 2388, lAN 4082, Fx 3899, Fx 3864, Fx 3846 and Fx 3810 was studied in ecological conditions of Tracuateua. PA. Eight years after the beginning of the experiments, the best clones in vegetativo development were Fx 3810, lAN 717 and lAN 3087, emphasizing Fx 3810, with 73% of the plants in conditions for tapping.

Chemistry (Weinheim an der Bergstrasse, Germany), Jan 29, 2015

New AgAu tadpole nanocrystals were synthesized in a one-step reaction involving simultaneous galv... more New AgAu tadpole nanocrystals were synthesized in a one-step reaction involving simultaneous galvanic replacement between Ag nanospheres and AuCl4 (-) (aq.) and AuCl4 (-) (aq.) reduction to Au in the presence of citrate. The AgAu tadpoles display nodular polycrystalline hollow heads, while their undulating tails are single crystals. The unusual morphology suggests an oriented attachment growth mechanism. Remarkably, a 1 nm thick Ag layer was found to segregate so as to cover the entire surface of the tadpoles. By varying the nature of the seeds (Au NPs), double-headed Au tadpoles could also be obtained. The effect of a number of reaction parameters on product morphology were explored, leading to new insights into the growth mechanisms and surface segregation behavior involved in the synthesis of bimetallic and anisotropic nanomaterials.

Tree Genetics & Genomes, 2006

Theobroma grandiflorum (cupuassu) is an important fruit tree native to the Brazilian Amazon. Esta... more Theobroma grandiflorum (cupuassu) is an important fruit tree native to the Brazilian Amazon. Establishing the genetic diversity and structure of populations is critical to define long-term strategies for cupuassu conservation presently threatened by rapid deforestation. Three natural populations collected at the putative center of diversity, three groups of accessions established at a germplasm collection, and one derived from commercial plantings were analyzed. The genetic diversity was assessed using 21 polymorphic microsatellite loci originally developed for Theobroma cacao, disclosing a total of 113 alleles. The estimated genetic diversity parameters averaged over cupuassu populations (A=3.53 alleles per locus; H e =0.426; H o =0.346) were lower than the values reported for other Neotropical tree species. The three natural populations presented a positive and significant fixation index (f), ranging from 0.133 to 0.234. Cupuassu apparently adhered to a general pattern of genetic diversity structure of some Neotropical tree species occurring at low densities, with a low intrapopulation genetic diversity and important levels of endogamy, possibly due to biparental inbreeding derived from the presence of spatial genetic structure in the populations. A high level of genetic divergence was detected among the natural populations (θ p =0.301), a strong differentiation caused by limited gene flow, and suggesting that human interference in spreading and/or stimulating plantings might have had a smaller effect than expected. The approximate location of the T. grandiflorum center of diversity could not be confirmed by analyzing natural populations from the putative region.

TEMA - Tendências em Matemática Aplicada e Computacional, 2008

In this work, a new high resolution TVD scheme for unsteady flows with shock waves is presented. ... more In this work, a new high resolution TVD scheme for unsteady flows with shock waves is presented. The performance of the scheme is investigated for solving Burgers and Euler's equations. In particular, 1D shock tubes, 1D inviscid turbulence (Burgers equation) and 2D supersonic/transonic flows are simulated. The numerical results show good agreement with numerical and experimental data.

Molecular Ecology Notes, 2006

Theobroma grandiflorum (cupuassu) is an important fruit tree native to the Brazilian Amazon. Fort... more Theobroma grandiflorum (cupuassu) is an important fruit tree native to the Brazilian Amazon. Forty-eight microsatellite loci developed for the congener Theobroma cacao were tested in cupuassu , and 29 (60.4%) produced robust alleles. The analyses of 216 cupuassu accessions using the 21 polymorphic microsatellite loci revealed a total of 113 alleles. The number of alleles per polymorphic locus ranged from two to 11, with an average of 5.38 alleles per locus. The average observed heterozygosity was 0.343, while the mean expected heterozygosity was 0.614. The successful transferability of T. cacao microsatellite primers to cupuassu was consistent with currently accepted phylogeny.

International journal of preventive medicine, 2014

The cardiopulmonary exercise test (CPET) is considered to be the gold standard to evaluate functi... more The cardiopulmonary exercise test (CPET) is considered to be the gold standard to evaluate functional capacity (FC) in patients with heart failure. However, field tests such as the 6-min walk test (6MWT) and the incremental shuttle walk test (ISWT) are simple and effective in evaluating the same. Despite the increasing use of ISWT, no studies that used the test in patients with Chagas heart disease (CHD) were found and only few studies have evaluated the health-related quality-of-life (HRQoL) in this population. The objective of this study was to correlate the distance walked in the ISWT with distance walked by 6MWT and peak oxygen uptake (VO2peak) by CPET and HRQoL in patients with CHD. A total of 35 patients with CHD were evaluated according to the FC and HRQoL. The FC was assessed by CPET, 6MWT and ISWT. HRQoL was assessed by the generic short-form health survey (SF-36) and Minnesota Living with Heart Failure Questionnaire (MLHFQ). Descriptive data were shown as mean and standard...

Pesquisa Agropecuária Brasileira, 2003

Resumo -O objetivo deste trabalho foi selecionar descritores botânico-agronômicos quantitativos p... more Resumo -O objetivo deste trabalho foi selecionar descritores botânico-agronômicos quantitativos para caracterizar acessos de cupuaçuzeiro [Theobroma grandiflorum (Willd. ex Spreng.) Schum]. Foram avaliados 53 descritores associados a características de folha (14), de flor (18), de fruto (16), e descritores agronômicos (5). No descarte dos descritores, foi empregada a técnica multivariada de componentes principais, em duas etapas. Na primeira, a seleção aconteceu dentro de cada grupo. Em seguida, foi realizada análise conjunta para a seleção final. Três critérios foram adotados para descarte das variáveis. Foram descartados 34 descritores, representando redução de 64% dos inicialmente considerados. A lista mínima de descritores para o cupuaçuzeiro ficou assim composta: comprimento do pecíolo foliar, espessura do limbo foliar, largura do acume foliar, angulação das nervuras de base, comprimento do botão estriado, comprimento do pedúnculo floral, diâmetro do pedúnculo floral, diâmetro do ovário, número de óvulos, comprimento da lâmina da pétala, comprimento dos estaminóides, diâmetro transversal da semente, semente chocha, acidez, brix, pH, número de botões caídos ao solo, número de frutos imaturos caídos precocemente e número de vassouras-de-bruxa produzidas.

This study investigates the relation between anthropometric and functional characteristics of juv... more This study investigates the relation between anthropometric and functional characteristics of juvenile/infantile categories and their results at the State Optimist Class Sailing Championship of 2006 held in Rio de Janeiro. A group of 50 male sailors of both categories were evaluated. The juvenile category presented superior height, as expected, and a lower fat percentage in relation to the infantile category,

Advances in Applied Clifford Algebras, 2015

ABSTRACT Nuclear Magnetic Resonance experiments can provide distances between pairs of atoms of a... more ABSTRACT Nuclear Magnetic Resonance experiments can provide distances between pairs of atoms of a protein that are close enough and the problem is how to determine the 3D protein structure based on this partial distance information, called Molecular Distance Geometry Problem. It is possible to define an atomic order 1, ..., n and solve the problem iteratively using an exact method, called Branch-and-Prune (BP). The main step of BP algorithm is to solve a quadratic system to get the two possible positions for i, i &gt; 3, in terms of the positions of i−3, i−2, i−1 and the distances d i−1, i , d i−2, i , d i−3, i . Because of uncertainty in NMR data, some of the distances d i−3, i may not be precise and the main problem to apply BP is related to the difficulty of obtaining an analytical expression of the position of atom i in terms of the positions of the three previous ones and the corresponding distances. We present such expression and although it is similar to one already existing in the literature, based on polyspherical coordinates, a new proof is given, based on Clifford algebra, and we also explain how such expression can be useful in BP using a parameterization which depends on d i−3, i . The results suggest that a master equation might exist, what is generally not believed by many researchers.

BMC Bioinformatics, 2014

Background: The determination of protein structures satisfying distance constraints is an importa... more Background: The determination of protein structures satisfying distance constraints is an important problem in structural biology. Whereas the most common method currently employed is simulated annealing, there have been other methods previously proposed in the literature. Most of them, however, are designed to find one solution only.

. Grover’s algorithm is a quantum algorithm for searching in unstructured databases which provid... more . Grover’s algorithm is a quantum algorithm for searching in unstructured databases which provides a quadratic speedup over their classical counterparts. We propose to use Clifford algebra in order to present a new way to describe the operators of Grover’s algorithm and to simplify the calculation of its computational complexity.

Ciência Rural, 2004

A presente investigação foi realizada devido à escassez, no Brasil, de informações sobre os possí... more A presente investigação foi realizada devido à escassez, no Brasil, de informações sobre os possíveis danos decorrentes da ação hematófaga da mosca-dos-chifres, Haematobia irritans (L.), em bovinos da raça Nelore. O estudo foi realizado durante quatro estações chuvosas (outubro a abril), de 1991 a 1995. Em cada ano, 80 bovinos foram utilizados de acordo com os seguintes tratamentos: 28 touros com um ano de idade divididos em quatro grupos; 20 bois com idade de dois anos divididos em quatro grupos, e 32 bois com três anos e divididos em oito grupos. Metade dos grupos de animais de cada idade eram tratados contra H. irritans com intervalos de 28 dias e os demais mantidos como grupos controle. As moscas foram contadas a cada 14 dias e o peso dos bois registrado a cada 28. O número médio de mosca/animal dos grupos controle para o primeiro, segundo, terceiro e quarto anos do estudo foi, respectivamente: cinco, cinco, quatro e cinco, nos animais de um ano; 15, 11, 13 e 27, nos de dois anos e 55, 31, 40 e 51, nos de três anos. Observou-se que maior número de moscas (P<0,05) atacou os animais mais velhos. Houve, em todos os períodos de avaliação, apesar do número de moscas por animal poder ser considerado baixo, um ganho de peso significativo (P<0,05) em prol dos grupos tratados contra H. irritans comparativamente aos grupos não tratados. Os ganhos foram 8,6; 16,0 e 10,4% superiores, respectivamente, para animais de um, dois e três anos de idade. Esse ganho de peso por animal e por ano foi da ordem de 9, 5, 7 e 8 kg para os animais com um ano de idade; de 26, 10, 23 e 12 kg para aqueles de dois anos, e de 16, 8, 9 e 11 kg nos de três anos. ABSTRACT This investigation was carried out due the lack of information about the possible effects of the blood-feeding horn fly, Haematobia irritans (L.), on Nellore cattle. Data were recorded during four rainy seasons (October to April) from 1991 to 1995. In each year, 80 animals were utilized according to the following treatments: twenty-eight 1

Pesquisa Agropecuária Brasileira, 2000

SIDALC - Servicio de Informacion y Documentacion Agropecuaria de las Americas.

Pesquisa Veterinária Brasileira, 2002

Page 1. Pesq. Vet. Bras. 22(3):109-113, jul./set. 2002 109 RESUMO.- Estudaram-se o comportamentos... more Page 1. Pesq. Vet. Bras. 22(3):109-113, jul./set. 2002 109 RESUMO.- Estudaram-se o comportamentos e os danos cau-sados pela mosca-dos-chifres em vacas e bezerros Nelore an-tes da desmama. Foram utilizados dois ...

Pesquisa Agropecuária Brasileira, 2000

RESUMO -Este estudo avaliou o efeito do tamanho do folículo na capacidade dos ovócitos de sofrere... more RESUMO -Este estudo avaliou o efeito do tamanho do folículo na capacidade dos ovócitos de sofrerem maturação nuclear e citoplasmática. Ovários de vacas Nelore (Bos indicus) foram coletados logo após o abate, e os complexos cúmulus-ovócitos foram aspirados de folículos de diferentes categorias, e classificados de acordo com seus diâmetros em: 1-2 mm, 3-5 mm, 6-8 mm e ≥9 mm. A medida do diâmetro e a fixação dos ovócitos para avaliação do estádio nuclear antes da maturação foram feitas logo após a aspiração. Ovócitos morfologicamente viáveis foram maturados, fecundados e cultivados in vitro. Os ovócitos obtidos de folículos de 1-2 mm apresentaram menor diâmetro (P<0,01) do que os dos demais grupos. Antes da maturação, 89,8%, 90,1%, 85,7% e 100% dos ovócitos provenientes de folículos de 1-2, 3-5, 6-8 e ≥9 mm de diâmetro, respectivamente, apresentavam vesícula germinativa. O tamanho do folículo não influenciou (P<0,05) a taxa de maturação nuclear. A porcentagem de ovócitos que chegaram a metáfase II foi de 88,8%, 87,8%, 92,9% e 100% no que se refere aos ovócitos de folículos de 1-2, 3-5, 6-8 e ≥9 mm, respectivamente. As taxas de penetração e clivagem foram semelhantes (P>0,05) nos grupos de 1-2 mm (93,4% e 81,9%), 3-5 mm (90,7% e 79,6%), 6-8 mm (91,3% e 77,8%) e ≥9 mm (92,0% e 78,3%). Da mesma forma, não houve diferenças (P>0,05) entre as categorias de folículos no que se refere às taxas de polispermia, descondensação da cabeça do espermatozóide e formação de pronúcleos. Os resultados deste estudo demonstram que na espécie B. indicus, folículos com diâmetro de 1 mm até ≥9 mm não influenciaram a capacidade dos ovócitos de reiniciar e completar a meiose e de clivar após maturação e fecundação in vitro.

Ambiente e Agua - An Interdisciplinary Journal of Applied Science, 2007

Ambiente e Água - An Interdisciplinary Journal of Applied Science Universidade de Taubaté ambi-ag... more Ambiente e Água - An Interdisciplinary Journal of Applied Science Universidade de Taubaté ambi-agua@agro.unitau.br ISSN (Versión impresa): 1980-993X BRASIL ... 2007 Rafael Figueiredo Alves / Herly Carlos Teixeira Dias / José Carlos de Oliveira / Franklin Nicolai Mota Garcia ...

abepro.org.br

Over the last decades, several industries, such as the automotive, the aviation, the pharmaceutic... more Over the last decades, several industries, such as the automotive, the aviation, the pharmaceutical, and the civil construction, among others, have gone through processes aimed to improve the quality of their products. The software industry has also followed the same trend, motivated by the globalization of services, facilitated by the Internet explosion, and a stronger presence of the emergent countries in software production, such as India. This has made the software-producing companies seek for mechanisms that guarantee the quality of all processes involved in the creation and maintenance of their products. The ISO (International Standardization Organization) 9000 Series Standards, and the CMM model (Capability Maturity Model) developed by SEI (Software Engineering Institute), offer reliable standards to achieve quality software products.

ACS applied materials & interfaces, Jan 6, 2015

In this paper, a simple but powerful method for controlling the size and surface morphology of Ag... more In this paper, a simple but powerful method for controlling the size and surface morphology of AgAu nanodendrites is presented. Control of the number of Ag nanoparticle seeds is found to provide a fast and effective route by which to manipulate the size and morphology of nanoparticles produced via a combined galvanic replacement and reduction reaction. A lower number of Ag nanoparticle seeds leads to larger nanodendrites with the particles' outer diameter being tunable in the range of 45 to 148 nm. The size and surface morphology of the nanodendrites was found to directly affect their catalytic activity. Specifically, we report on the activity of these AgAu nanodendrites in catalyzing the gas-phase oxidation of benzene, toluene and o-xylene (BTX), which is an important reaction for the removal of these toxic compounds from fuels and for environmental remediation. All nanodendrite particles produced were found to be catalytically active, even at low temperatures and low metal loa...

Chemistry (Weinheim an der Bergstrasse, Germany), Jan 24, 2015

Bimetallic Tadpoles. New AgAu tadpoles have been synthesized in a one-step reaction involving gal... more Bimetallic Tadpoles. New AgAu tadpoles have been synthesized in a one-step reaction involving galvanic replacement between Ag nanospheres and AuCl4 (-) (aq.) in the presence of citrate. In their Full Paper on page 12314 ff., S. J. Haigh, P. H. C. Camargo and colleagues report how the tadpoles display nodular polycrystalline hollow heads while their undulating tails were single-crystalline, in agreement with an oriented attachment growth mechanism (top image). Remarkably, a 1 nm thick Ag layer (shown in red, bottom image) is found to segregate so as to cover the entire surface of the tadpoles (Au is shown in green).

Pesquisa Agropecuaria Brasileira, 1982

EURICO PINHEIRO2 e JOMAR DA PAES PEREIRA 4 RESUMO -Foi estudado o desempenho dos clones de sering... more EURICO PINHEIRO2 e JOMAR DA PAES PEREIRA 4 RESUMO -Foi estudado o desempenho dos clones de seringueira (Hevea sp): LAN 717, lAN 873, lAN 3087, lAN 2880, LAN 2388, lAN 4082, Fx 3899, Fx 3864,Fx 3846 e Fx 3810, nas condições ecológicas de Tracuateua, PÁ, Decorridos oito anos da instalação do experimento, os clones que apresentam melhor desenvolvimento vegetativo são: Fx 3810, LAN 717 e lAN 3087. Destes destaca-se o clone Px 3810 com 73% das plantas em condições de sangria. Termos para indexação:Microcylus ulei, competição de clones, desenvolvimento vegetativo,Hevea sp BEHAVIOUR OF SOME AMAZONIAN CLONES OF RUBBER TREE IN TRACUATEUA ABSTRACT -The performance of the rubber tree clones (Hevea sp.) lAN 717, lAN 873, lAN 2880, lAN 2388, lAN 4082, Fx 3899, Fx 3864, Fx 3846 and Fx 3810 was studied in ecological conditions of Tracuateua. PA. Eight years after the beginning of the experiments, the best clones in vegetativo development were Fx 3810, lAN 717 and lAN 3087, emphasizing Fx 3810, with 73% of the plants in conditions for tapping.

Chemistry (Weinheim an der Bergstrasse, Germany), Jan 29, 2015

New AgAu tadpole nanocrystals were synthesized in a one-step reaction involving simultaneous galv... more New AgAu tadpole nanocrystals were synthesized in a one-step reaction involving simultaneous galvanic replacement between Ag nanospheres and AuCl4 (-) (aq.) and AuCl4 (-) (aq.) reduction to Au in the presence of citrate. The AgAu tadpoles display nodular polycrystalline hollow heads, while their undulating tails are single crystals. The unusual morphology suggests an oriented attachment growth mechanism. Remarkably, a 1 nm thick Ag layer was found to segregate so as to cover the entire surface of the tadpoles. By varying the nature of the seeds (Au NPs), double-headed Au tadpoles could also be obtained. The effect of a number of reaction parameters on product morphology were explored, leading to new insights into the growth mechanisms and surface segregation behavior involved in the synthesis of bimetallic and anisotropic nanomaterials.

Tree Genetics & Genomes, 2006

Theobroma grandiflorum (cupuassu) is an important fruit tree native to the Brazilian Amazon. Esta... more Theobroma grandiflorum (cupuassu) is an important fruit tree native to the Brazilian Amazon. Establishing the genetic diversity and structure of populations is critical to define long-term strategies for cupuassu conservation presently threatened by rapid deforestation. Three natural populations collected at the putative center of diversity, three groups of accessions established at a germplasm collection, and one derived from commercial plantings were analyzed. The genetic diversity was assessed using 21 polymorphic microsatellite loci originally developed for Theobroma cacao, disclosing a total of 113 alleles. The estimated genetic diversity parameters averaged over cupuassu populations (A=3.53 alleles per locus; H e =0.426; H o =0.346) were lower than the values reported for other Neotropical tree species. The three natural populations presented a positive and significant fixation index (f), ranging from 0.133 to 0.234. Cupuassu apparently adhered to a general pattern of genetic diversity structure of some Neotropical tree species occurring at low densities, with a low intrapopulation genetic diversity and important levels of endogamy, possibly due to biparental inbreeding derived from the presence of spatial genetic structure in the populations. A high level of genetic divergence was detected among the natural populations (θ p =0.301), a strong differentiation caused by limited gene flow, and suggesting that human interference in spreading and/or stimulating plantings might have had a smaller effect than expected. The approximate location of the T. grandiflorum center of diversity could not be confirmed by analyzing natural populations from the putative region.

TEMA - Tendências em Matemática Aplicada e Computacional, 2008

In this work, a new high resolution TVD scheme for unsteady flows with shock waves is presented. ... more In this work, a new high resolution TVD scheme for unsteady flows with shock waves is presented. The performance of the scheme is investigated for solving Burgers and Euler's equations. In particular, 1D shock tubes, 1D inviscid turbulence (Burgers equation) and 2D supersonic/transonic flows are simulated. The numerical results show good agreement with numerical and experimental data.

Molecular Ecology Notes, 2006

Theobroma grandiflorum (cupuassu) is an important fruit tree native to the Brazilian Amazon. Fort... more Theobroma grandiflorum (cupuassu) is an important fruit tree native to the Brazilian Amazon. Forty-eight microsatellite loci developed for the congener Theobroma cacao were tested in cupuassu , and 29 (60.4%) produced robust alleles. The analyses of 216 cupuassu accessions using the 21 polymorphic microsatellite loci revealed a total of 113 alleles. The number of alleles per polymorphic locus ranged from two to 11, with an average of 5.38 alleles per locus. The average observed heterozygosity was 0.343, while the mean expected heterozygosity was 0.614. The successful transferability of T. cacao microsatellite primers to cupuassu was consistent with currently accepted phylogeny.

International journal of preventive medicine, 2014

The cardiopulmonary exercise test (CPET) is considered to be the gold standard to evaluate functi... more The cardiopulmonary exercise test (CPET) is considered to be the gold standard to evaluate functional capacity (FC) in patients with heart failure. However, field tests such as the 6-min walk test (6MWT) and the incremental shuttle walk test (ISWT) are simple and effective in evaluating the same. Despite the increasing use of ISWT, no studies that used the test in patients with Chagas heart disease (CHD) were found and only few studies have evaluated the health-related quality-of-life (HRQoL) in this population. The objective of this study was to correlate the distance walked in the ISWT with distance walked by 6MWT and peak oxygen uptake (VO2peak) by CPET and HRQoL in patients with CHD. A total of 35 patients with CHD were evaluated according to the FC and HRQoL. The FC was assessed by CPET, 6MWT and ISWT. HRQoL was assessed by the generic short-form health survey (SF-36) and Minnesota Living with Heart Failure Questionnaire (MLHFQ). Descriptive data were shown as mean and standard...

Pesquisa Agropecuária Brasileira, 2003

Resumo -O objetivo deste trabalho foi selecionar descritores botânico-agronômicos quantitativos p... more Resumo -O objetivo deste trabalho foi selecionar descritores botânico-agronômicos quantitativos para caracterizar acessos de cupuaçuzeiro [Theobroma grandiflorum (Willd. ex Spreng.) Schum]. Foram avaliados 53 descritores associados a características de folha (14), de flor (18), de fruto (16), e descritores agronômicos (5). No descarte dos descritores, foi empregada a técnica multivariada de componentes principais, em duas etapas. Na primeira, a seleção aconteceu dentro de cada grupo. Em seguida, foi realizada análise conjunta para a seleção final. Três critérios foram adotados para descarte das variáveis. Foram descartados 34 descritores, representando redução de 64% dos inicialmente considerados. A lista mínima de descritores para o cupuaçuzeiro ficou assim composta: comprimento do pecíolo foliar, espessura do limbo foliar, largura do acume foliar, angulação das nervuras de base, comprimento do botão estriado, comprimento do pedúnculo floral, diâmetro do pedúnculo floral, diâmetro do ovário, número de óvulos, comprimento da lâmina da pétala, comprimento dos estaminóides, diâmetro transversal da semente, semente chocha, acidez, brix, pH, número de botões caídos ao solo, número de frutos imaturos caídos precocemente e número de vassouras-de-bruxa produzidas.