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Papers by Bruno Alves

Research paper thumbnail of Avaliação Da Disponibilidade De Macro e Micronutrientes Para Arroz De Sequeiro Cultivado Em Um Solo Calcário Da Região De Irecê

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Research paper thumbnail of Fixação biológica e transferência de nitrogênio por leguminosas em pomar orgânico de mangueira e gravioleira

Pesquisa Agropecuaria Brasileira, Dec 22, 2010

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Research paper thumbnail of Estoque de carbono e nitrogênio e emissão de N2O em diferentes usos do solo na Mata Atlântica

Pesquisa Agropecuaria Brasileira, Jan 10, 2011

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Research paper thumbnail of Genótipos de capim-elefante para produção de bioenergia por combustão direta da biomassa

Pesquisa Agropecuaria Brasileira, Nov 9, 2010

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Research paper thumbnail of Papel Da Fixação Biológica De Nitrogênio Em Um Sistema De Produção De Berinjela Sob Manejo Orgânico

Revista Brasileira De Agroecologia, Nov 12, 2006

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Research paper thumbnail of ABOVEGROUND AND TOTAL ROOT BIOMASS COMPONENTS OF Brachiaria PASTURES IN DIFFERENT AGES AFTER RENOVATION AS A PRODUCTION INDICATOR UNDER SAVANNA VEGETATION COMPONENTES DA PARTE AÉREA E RAÍZES DE PASTAGENS DE Brachiaria spp. EM DIFERENTES IDADES APÓS A REFORMA, COMO INDICADORES DE PRODUTIVIDADE EM ...

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Research paper thumbnail of Calibração de câmara semiaberta estática para quantificação de amônia volatilizada do solo

Pesquisa Agropecuaria Brasileira, Nov 18, 2010

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Research paper thumbnail of COMPONENTES DA PARTE AÉREA E RAÍZES DE PASTAGENS DE Brachiaria spp. EM DIFERENTES IDADES APÓS A REFORMA, COMO INDICADORES DE PRODUTIVIDADE EM AMBIENTE DE CERRADO

Pesquisa Agropecuaria Tropical, 2007

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Research paper thumbnail of Estoque de carbono e nitrog�nio e emiss�o de N2O em diferentes usos do solo na Mata Atl�ntica

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Research paper thumbnail of Estimation of N2 fixation in Desmodium ovalifolium from the relative ureide abundance of stem solutes: Comparison with the 15 N-dilution and an in situ soil core technique

Nutr Cycl Agroecosyst, 2000

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Research paper thumbnail of Rede de coautoria institucional em Ciência da Informação: uma comparação entre indicadores de rede e os conceitos CAPES

Em Questao, Dec 22, 2014

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Research paper thumbnail of Emiss�o de �xido nitroso com a aplica��o de dejetos l�quidos de su�nos em solo sob plantio direto

Pab, 2006

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Research paper thumbnail of Aduba��o verde como fonte de nitrog�nio para a cultura da berinjela em sistema org�nico

Pab, 2004

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Research paper thumbnail of Produção e qualidade da biomassa de diferentes genótipos de capim-elefante cultivados para uso energético

Revista Brasileira De Agroecologia, Dec 31, 2009

Resumo A cultura de capim elefante (Pennisetum purpureum Schum.) é altamente eficiente na fixação... more Resumo A cultura de capim elefante (Pennisetum purpureum Schum.) é altamente eficiente na fixação de CO2 (gás carbônico) atmosférico durante o processo de fotossíntese para a produção de biomassa vegetal. Por ser uma espécie de rápido crescimento, a biomassa de capim-...

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Research paper thumbnail of Legumes for mitigation of climate change and feedstock in a bio-based economy - a review

Legumes are unique plants which contribute with several functions and services of great value for... more Legumes are unique plants which contribute with several functions and services of great value for agriculture and society. Including legume food, forage and tree crops in farming systems is one approach to mitigate climate change. We have shown that the ability of the ...

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Research paper thumbnail of Use of green manures in increasing inputs of biologically fixed nitrogen to sugar cane

Biology and Fertility of Soils, Mar 22, 2003

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Research paper thumbnail of The role of research leaders on the evolution of scientific communities

Proceedings of the 22nd International Conference on World Wide Web Companion, May 13, 2013

ABSTRACT There have been considerable efforts in the literature towards understanding and modelin... more ABSTRACT There have been considerable efforts in the literature towards understanding and modeling dynamic aspects of scientific communities. Despite the great interest, little is known about the role that different members play in the formation of the underlying network structure of such communities. In this paper, we provide a wide investigation of the roles that members of the core of scientific communities play in the collaboration network structure formation and evolution. To do that, we define a community core based on an individual metric, core score, which is an h-index derived metric that captures both, the prolificness and the involvement of researchers in a community. Our results provide a number of key observations related to community formation and evolving patterns. Particularly, we show that members of the community core work as bridges that connect smaller clustered research groups. Furthermore, these members are responsible for an increase in the average degree of the whole community underlying network and a decrease on the overall network assortativeness. More important, we note that variations on the members of the community core tend to be strongly correlated with variations on these metrics. We argue that our observations are important for shedding a light on the role of key members on community formation and structure.

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Research paper thumbnail of Caracterização do processo de compostagem de capim elefante com diferentes matérias primas como fonte de nitrogênio

Anais Da Semana Cientifica Johanna Dobereiner, Sep 25, 2012

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Research paper thumbnail of Evaluation of Techniques for Determination of Molybdenum in Sugarcane Leaves

Communications in Soil Science and Plant Analysis, Feb 1, 2006

In crops of the sugarcane, the concentrations of molybdenum (Mo) in the leaves are generally lowe... more In crops of the sugarcane, the concentrations of molybdenum (Mo) in the leaves are generally lower than 0.3 mg Mo kg. These low concentrations have resulted in limitations in the methods and instruments that can be used for these analyses. The objective of this study was to evaluate three different techniques to determine the concentration of Mo in sugarcane leaves sampled in the principal sugarcane‐producing areas in Brazil. Two spectrometric techniques were evaluated by using ICP‐EAS (Inductively Coupled Plasma‐Emission Automated System) and DCP‐MEAS (Direct Coupled Plasma–Multiple Emission Automated System) and a colorimetric technique of the reaction between potassium iodide and hydrogen peroxide (KI‐H2O2). The techniques ICP‐EAS and KI‐H2O2 produced results of satisfactory accuracy and precision, whereas the DCP‐MEAS consistently overestimated the Mo concentrations in cane leaves. The KI‐H2O2 technique showed sensitivity 5 times greater than the ICP‐EAS, with minimum detection limits of 0.1 and 0.5 mg Mo kg, respectively.

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Research paper thumbnail of Smart hollow microspheres of chondroitin sulfate conjugates and magnetite nanoparticles for magnetic vector

Journal of Colloid and Interface Science, Dec 1, 2010

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Research paper thumbnail of Avaliação Da Disponibilidade De Macro e Micronutrientes Para Arroz De Sequeiro Cultivado Em Um Solo Calcário Da Região De Irecê

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fixação biológica e transferência de nitrogênio por leguminosas em pomar orgânico de mangueira e gravioleira

Pesquisa Agropecuaria Brasileira, Dec 22, 2010

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Research paper thumbnail of Estoque de carbono e nitrogênio e emissão de N2O em diferentes usos do solo na Mata Atlântica

Pesquisa Agropecuaria Brasileira, Jan 10, 2011

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Research paper thumbnail of Genótipos de capim-elefante para produção de bioenergia por combustão direta da biomassa

Pesquisa Agropecuaria Brasileira, Nov 9, 2010

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Research paper thumbnail of Papel Da Fixação Biológica De Nitrogênio Em Um Sistema De Produção De Berinjela Sob Manejo Orgânico

Revista Brasileira De Agroecologia, Nov 12, 2006

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Research paper thumbnail of ABOVEGROUND AND TOTAL ROOT BIOMASS COMPONENTS OF Brachiaria PASTURES IN DIFFERENT AGES AFTER RENOVATION AS A PRODUCTION INDICATOR UNDER SAVANNA VEGETATION COMPONENTES DA PARTE AÉREA E RAÍZES DE PASTAGENS DE Brachiaria spp. EM DIFERENTES IDADES APÓS A REFORMA, COMO INDICADORES DE PRODUTIVIDADE EM ...

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Research paper thumbnail of Calibração de câmara semiaberta estática para quantificação de amônia volatilizada do solo

Pesquisa Agropecuaria Brasileira, Nov 18, 2010

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Research paper thumbnail of COMPONENTES DA PARTE AÉREA E RAÍZES DE PASTAGENS DE Brachiaria spp. EM DIFERENTES IDADES APÓS A REFORMA, COMO INDICADORES DE PRODUTIVIDADE EM AMBIENTE DE CERRADO

Pesquisa Agropecuaria Tropical, 2007

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Research paper thumbnail of Estoque de carbono e nitrog�nio e emiss�o de N2O em diferentes usos do solo na Mata Atl�ntica

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Estimation of N2 fixation in Desmodium ovalifolium from the relative ureide abundance of stem solutes: Comparison with the 15 N-dilution and an in situ soil core technique

Nutr Cycl Agroecosyst, 2000

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Rede de coautoria institucional em Ciência da Informação: uma comparação entre indicadores de rede e os conceitos CAPES

Em Questao, Dec 22, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Emiss�o de �xido nitroso com a aplica��o de dejetos l�quidos de su�nos em solo sob plantio direto

Pab, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Aduba��o verde como fonte de nitrog�nio para a cultura da berinjela em sistema org�nico

Pab, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Produção e qualidade da biomassa de diferentes genótipos de capim-elefante cultivados para uso energético

Revista Brasileira De Agroecologia, Dec 31, 2009

Resumo A cultura de capim elefante (Pennisetum purpureum Schum.) é altamente eficiente na fixação... more Resumo A cultura de capim elefante (Pennisetum purpureum Schum.) é altamente eficiente na fixação de CO2 (gás carbônico) atmosférico durante o processo de fotossíntese para a produção de biomassa vegetal. Por ser uma espécie de rápido crescimento, a biomassa de capim-...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Legumes for mitigation of climate change and feedstock in a bio-based economy - a review

Legumes are unique plants which contribute with several functions and services of great value for... more Legumes are unique plants which contribute with several functions and services of great value for agriculture and society. Including legume food, forage and tree crops in farming systems is one approach to mitigate climate change. We have shown that the ability of the ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Use of green manures in increasing inputs of biologically fixed nitrogen to sugar cane

Biology and Fertility of Soils, Mar 22, 2003

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The role of research leaders on the evolution of scientific communities

Proceedings of the 22nd International Conference on World Wide Web Companion, May 13, 2013

ABSTRACT There have been considerable efforts in the literature towards understanding and modelin... more ABSTRACT There have been considerable efforts in the literature towards understanding and modeling dynamic aspects of scientific communities. Despite the great interest, little is known about the role that different members play in the formation of the underlying network structure of such communities. In this paper, we provide a wide investigation of the roles that members of the core of scientific communities play in the collaboration network structure formation and evolution. To do that, we define a community core based on an individual metric, core score, which is an h-index derived metric that captures both, the prolificness and the involvement of researchers in a community. Our results provide a number of key observations related to community formation and evolving patterns. Particularly, we show that members of the community core work as bridges that connect smaller clustered research groups. Furthermore, these members are responsible for an increase in the average degree of the whole community underlying network and a decrease on the overall network assortativeness. More important, we note that variations on the members of the community core tend to be strongly correlated with variations on these metrics. We argue that our observations are important for shedding a light on the role of key members on community formation and structure.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Caracterização do processo de compostagem de capim elefante com diferentes matérias primas como fonte de nitrogênio

Anais Da Semana Cientifica Johanna Dobereiner, Sep 25, 2012

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evaluation of Techniques for Determination of Molybdenum in Sugarcane Leaves

Communications in Soil Science and Plant Analysis, Feb 1, 2006

In crops of the sugarcane, the concentrations of molybdenum (Mo) in the leaves are generally lowe... more In crops of the sugarcane, the concentrations of molybdenum (Mo) in the leaves are generally lower than 0.3 mg Mo kg. These low concentrations have resulted in limitations in the methods and instruments that can be used for these analyses. The objective of this study was to evaluate three different techniques to determine the concentration of Mo in sugarcane leaves sampled in the principal sugarcane‐producing areas in Brazil. Two spectrometric techniques were evaluated by using ICP‐EAS (Inductively Coupled Plasma‐Emission Automated System) and DCP‐MEAS (Direct Coupled Plasma–Multiple Emission Automated System) and a colorimetric technique of the reaction between potassium iodide and hydrogen peroxide (KI‐H2O2). The techniques ICP‐EAS and KI‐H2O2 produced results of satisfactory accuracy and precision, whereas the DCP‐MEAS consistently overestimated the Mo concentrations in cane leaves. The KI‐H2O2 technique showed sensitivity 5 times greater than the ICP‐EAS, with minimum detection limits of 0.1 and 0.5 mg Mo kg, respectively.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Smart hollow microspheres of chondroitin sulfate conjugates and magnetite nanoparticles for magnetic vector

Journal of Colloid and Interface Science, Dec 1, 2010

Bookmarks Related papers MentionsView impact

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