Bruno Alves - Academia.edu (original) (raw)
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Papers by Bruno Alves
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Pesquisa Agropecuaria Brasileira, Dec 22, 2010
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Pesquisa Agropecuaria Brasileira, Jan 10, 2011
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Pesquisa Agropecuaria Brasileira, Nov 9, 2010
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Revista Brasileira De Agroecologia, Nov 12, 2006
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Pesquisa Agropecuaria Brasileira, Nov 18, 2010
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Pesquisa Agropecuaria Tropical, 2007
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Nutr Cycl Agroecosyst, 2000
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Em Questao, Dec 22, 2014
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Pab, 2006
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Pab, 2004
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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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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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Biology and Fertility of Soils, Mar 22, 2003
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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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Anais Da Semana Cientifica Johanna Dobereiner, Sep 25, 2012
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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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Journal of Colloid and Interface Science, Dec 1, 2010
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Pesquisa Agropecuaria Brasileira, Dec 22, 2010
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Pesquisa Agropecuaria Brasileira, Jan 10, 2011
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Pesquisa Agropecuaria Brasileira, Nov 9, 2010
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Revista Brasileira De Agroecologia, Nov 12, 2006
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Pesquisa Agropecuaria Brasileira, Nov 18, 2010
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Pesquisa Agropecuaria Tropical, 2007
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Nutr Cycl Agroecosyst, 2000
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Em Questao, Dec 22, 2014
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Pab, 2006
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Pab, 2004
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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
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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Biology and Fertility of Soils, Mar 22, 2003
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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
Anais Da Semana Cientifica Johanna Dobereiner, Sep 25, 2012
Bookmarks Related papers MentionsView impact
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
Journal of Colloid and Interface Science, Dec 1, 2010
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