Pedro Henrique - Academia.edu (original) (raw)
Papers by Pedro Henrique
Nowadays, data handled by an institution or company is spread out by more than one database and l... more Nowadays, data handled by an institution or company is spread out by more than one database and lots of documents of different types. To extract the information implicit in that data, it is necessary to pick parts from those various archives. To obtain a general overview, those information slices should be integrated. Different approaches can be followed to achieve that integration, ranging from the merge of resources till the fusion of the extracted parts. In this paper, we introduce Metamorphosis – a Topic Maps oriented environment that enables a conceptual navigation among heterogenous information systems – and we argue that Metamorphosis can be used to achieve, via Topic Maps, the referred semantic integration.
Nano Letters, 2008
Highly faceted Pt nanocrystals with a large number of interconnected arms in a quasi-octahedral s... more Highly faceted Pt nanocrystals with a large number of interconnected arms in a quasi-octahedral shape were synthesized simply by reducing H2PtCl6 precursor with poly(vinyl pyrrolidone) in aqueous solutions containing a trace amount of FeCl3. The iron species (Fe(3+) or Fe(2+)) play a key role in inducing the formation of the multioctahedral structure by decreasing the concentration of Pt atoms and keeping a low concentration for the Pt seeds during the reaction. This condition favors the overgrowth of Pt seeds along their corners and thus the formation of multiarmed nanocrystals. Electron microscopy studies revealed that the multioctahedral Pt nanocrystals exhibit a large number of edge, corner, and surface step atoms. The size of the multioctahedral Pt nanocrystals can be controlled by varying the concentration of FeCl3 added to the reaction and/or the reaction temperature. These multioctahedral Pt nanocrystals were tested as electrocatalysts for the oxygen reduction reaction in a proton exchange membrane fuel cell and exhibited improved specific activity and durability compared to commercial Pt/C catalyst.
Electronic Notes in Theoretical Computer Science, 2002
Many tools can be automatically derived from formal language definitions, such as compilers/inter... more Many tools can be automatically derived from formal language definitions, such as compilers/interpreters, editors, analyzers, visualizers/animators, etc. Some examples of languagebased tools generated automatically by the LISA system are described in the paper. In addition the specification of an algorithm animator and program visualizer, Alma, generated from an extended LISA input-grammar is discussed; LISA principles and code are reused in Alma implementation.
Scientia Agricola, 2001
RESUMO: O nitrogênio é um dos nutrientes cujo fornecimento está relacionado aos maiores aumentos ... more RESUMO: O nitrogênio é um dos nutrientes cujo fornecimento está relacionado aos maiores aumentos na produtividade do mamoeiro. Entretanto, seu efeito sobre a qualidade dos frutos nem sempre tem se mostrado favorável. Com o objetivo de verificar o efeito de fontes e doses de nitrogênio sobre algumas características qualitativas dos frutos do mamoeiro (Carica papaya L.) cv. Improved Sunrise Solo Line 72/12, conduziu-se este trabalho. O experimento foi conduzido no campo, sobre um ARGISSOLO AMARELO, no primeiro ano da cultura, em delineamento de blocos casualizados. Foram estudadas três doses de N (10, 20 e 30 g planta -1 mês -1 ), e duas fontes de nitrogênio (sulfato de amônio e nitrato de amônio). Avaliaram-se o número de frutos por planta, o peso médio dos frutos, o pH, a acidez titulável, o teor de ácido ascórbico e os sólidos solúveis totais. O aumento das doses de N foi acompanhado por um aumento linear do número de frutos por planta. O peso médio dos frutos, o pH e o teor de ácido cítrico não foram afetados pelos tratamentos. O sulfato de amônio provocou um decréscimo linear dos sólidos solúveis totais com o aumento das doses de N. A aplicação de nitrato de amônio promoveu maior produção de frutos com teor mais elevado de vitamina C. Palavras-chave: Carica papaya, mamão, adubação nitrogenada, qualidade de fruto, ácido ascórbico
Phytochemistry, 2000
Origem: Wikipédia, a enciclopédia livre.
Gondwana Research, 2005
Baurusuchus salgadoensis is a new baurusuchid crocodylomorph from Bauru Basin (Cretaceous), Brazi... more Baurusuchus salgadoensis is a new baurusuchid crocodylomorph from Bauru Basin (Cretaceous), Brazil, partially preserved through a complete skull. The fossil comes from a fine sandstone sequence of Adamantina Formation, General Salgado County, São Paulo State. The sedimentary sequence where it was found, located in Fazenda Buriti, is considered Turonian-Santonian in age. The described species -Baurusuchus salgadoensis sp. nov. -is a baurusuchid with an antorbital fenestra, double external nares with a bony septum, two well-fused supraorbitals, the supratemporal fenestrae larger than the orbits and a quadrangular-shaped laterotemporal fenestra. The position of the external nares, located on anterior and terminal portion of the rostrum together with the theropod-like lateral compression of the snout and teeth are indicators that Baurusuchus salgadoensis was a terrestrial crocodyliform. This was a carnivorous species and the lateral compression of the rostrum could be interpreted as a mechanism to increase the skull resistance forces during biting. The pointed, conical teeth, some with crenulated borders, could be used to perforate and to carve the prey. The geological context of Baurusuchus salgadoensis indicates that it probably lived in a hot and arid climate.
Medical and Veterinary Entomology, 2003
The efficacy of ripe fruit extracts of Melia azedarach L. (Rutales: Meliaceae) was evaluated agai... more The efficacy of ripe fruit extracts of Melia azedarach L. (Rutales: Meliaceae) was evaluated against the tick, Boophilus microplus (Canestrini) (Acari: Ixodidae). Ripe fruits of M. azedarach dried and powdered were extracted by Soxhlet apparatus successively using hexane, CHCl 3 and 96% aqueous ethanol. Larvae and engorged females were immersed in decreasing concentrations from 0.25% to 0.015% of each extract. The mortality of larvae was evaluated 24, 72 and 168 h after treatment. The effectiveness of treatment against engorged females was assessed by measuring egg production. All tested extracts caused mortality of B. microplus larvae, with higher mortality rates observed in CHCl 3 (100%) and hexanic extract (98%) than in ethanolic extract (50%) 168 h after treatment. The mortality was dependent on concentration and on time after treatment. Similarly hexanic and CHCl 3 extracts showed higher effectiveness (varying from 14% to 100%) against B. microplus engorged females than ethanolic extract (varying from 0% to 46%). Melia azedarach extracts did not kill the adult females, but inhibited partially or totally egg production and embryogenesis. These results show that the less polar the extract of M. azedarach ripe fruits the more its effectiveness against larvae and engorged females of B. microplus. This plant may therefore be useful in the control of resistant B. microplus populations.
Journal of Ethnopharmacology, 2000
The essential oil from the hydrodistillation of Eugenia dysenterica leaves consisted mainly of b-... more The essential oil from the hydrodistillation of Eugenia dysenterica leaves consisted mainly of b-caryophyllene and a-humulene as the major sesquiterpene, while limonene and a-thujene were the major monoterpene hydrocarbons. The main oxygenated mono and sesquiterpene constituents were a-terpineol and b-caryophyllene oxide, respectively. The oil was investigated against eight strains of Candida albicans, 35 strains of Cryptococcus neoformans var. neoformans, and two C. neoformans var. gattii isolated from HIV-infected individuals with candidosis or cryptococcal meningitis using the agar dilution method. Based on the minimal inhibitory concentration (MIC) values, the most significant results were obtained against Cryptococcus strains. It was observed that 22 strains were inhibited at a concentration of 250 mg/ml, whereas four exhibited potent inhibition with MIC values below 125 mg/ml against 10 6 UFC/ml organisms. We found MICs ] 3.12 mg/ml for 91.6, 50 and 30% of all Cryptococcus strains in relation of amphotericin B, fluconazole and itraconazole, respectively.
Brazilian Journal of Microbiology, 2002
Ethanolic extracts from leaves of Hyptis ovalifolia, H. suaveolens, H. saxatilis, Hyptidendrum ca... more Ethanolic extracts from leaves of Hyptis ovalifolia, H. suaveolens, H. saxatilis, Hyptidendrum canum, Eugenia uniflora, E. dysenterica, Caryocar brasiliensis and Lafoensia pacari were investigated for their antifungal activity against dermatophytes. The most effective plants were H. ovalifolia and E. uniflora, while Trichophyton rubrum was the most sensitive among the four dermatophytes species evaluated. This study has demonstrated antifungal properties of Brazilian Cerrado plant extracts in "in vitro" assays.
Origem: Wikipédia, a enciclopédia livre.
Nowadays, data handled by an institution or company is spread out by more than one database and l... more Nowadays, data handled by an institution or company is spread out by more than one database and lots of documents of different types. To extract the information implicit in that data, it is necessary to pick parts from those various archives. To obtain a general overview, those information slices should be integrated. Different approaches can be followed to achieve that integration, ranging from the merge of resources till the fusion of the extracted parts. In this paper, we introduce Metamorphosis – a Topic Maps oriented environment that enables a conceptual navigation among heterogenous information systems – and we argue that Metamorphosis can be used to achieve, via Topic Maps, the referred semantic integration.
Nano Letters, 2008
Highly faceted Pt nanocrystals with a large number of interconnected arms in a quasi-octahedral s... more Highly faceted Pt nanocrystals with a large number of interconnected arms in a quasi-octahedral shape were synthesized simply by reducing H2PtCl6 precursor with poly(vinyl pyrrolidone) in aqueous solutions containing a trace amount of FeCl3. The iron species (Fe(3+) or Fe(2+)) play a key role in inducing the formation of the multioctahedral structure by decreasing the concentration of Pt atoms and keeping a low concentration for the Pt seeds during the reaction. This condition favors the overgrowth of Pt seeds along their corners and thus the formation of multiarmed nanocrystals. Electron microscopy studies revealed that the multioctahedral Pt nanocrystals exhibit a large number of edge, corner, and surface step atoms. The size of the multioctahedral Pt nanocrystals can be controlled by varying the concentration of FeCl3 added to the reaction and/or the reaction temperature. These multioctahedral Pt nanocrystals were tested as electrocatalysts for the oxygen reduction reaction in a proton exchange membrane fuel cell and exhibited improved specific activity and durability compared to commercial Pt/C catalyst.
Electronic Notes in Theoretical Computer Science, 2002
Many tools can be automatically derived from formal language definitions, such as compilers/inter... more Many tools can be automatically derived from formal language definitions, such as compilers/interpreters, editors, analyzers, visualizers/animators, etc. Some examples of languagebased tools generated automatically by the LISA system are described in the paper. In addition the specification of an algorithm animator and program visualizer, Alma, generated from an extended LISA input-grammar is discussed; LISA principles and code are reused in Alma implementation.
Scientia Agricola, 2001
RESUMO: O nitrogênio é um dos nutrientes cujo fornecimento está relacionado aos maiores aumentos ... more RESUMO: O nitrogênio é um dos nutrientes cujo fornecimento está relacionado aos maiores aumentos na produtividade do mamoeiro. Entretanto, seu efeito sobre a qualidade dos frutos nem sempre tem se mostrado favorável. Com o objetivo de verificar o efeito de fontes e doses de nitrogênio sobre algumas características qualitativas dos frutos do mamoeiro (Carica papaya L.) cv. Improved Sunrise Solo Line 72/12, conduziu-se este trabalho. O experimento foi conduzido no campo, sobre um ARGISSOLO AMARELO, no primeiro ano da cultura, em delineamento de blocos casualizados. Foram estudadas três doses de N (10, 20 e 30 g planta -1 mês -1 ), e duas fontes de nitrogênio (sulfato de amônio e nitrato de amônio). Avaliaram-se o número de frutos por planta, o peso médio dos frutos, o pH, a acidez titulável, o teor de ácido ascórbico e os sólidos solúveis totais. O aumento das doses de N foi acompanhado por um aumento linear do número de frutos por planta. O peso médio dos frutos, o pH e o teor de ácido cítrico não foram afetados pelos tratamentos. O sulfato de amônio provocou um decréscimo linear dos sólidos solúveis totais com o aumento das doses de N. A aplicação de nitrato de amônio promoveu maior produção de frutos com teor mais elevado de vitamina C. Palavras-chave: Carica papaya, mamão, adubação nitrogenada, qualidade de fruto, ácido ascórbico
Phytochemistry, 2000
Origem: Wikipédia, a enciclopédia livre.
Gondwana Research, 2005
Baurusuchus salgadoensis is a new baurusuchid crocodylomorph from Bauru Basin (Cretaceous), Brazi... more Baurusuchus salgadoensis is a new baurusuchid crocodylomorph from Bauru Basin (Cretaceous), Brazil, partially preserved through a complete skull. The fossil comes from a fine sandstone sequence of Adamantina Formation, General Salgado County, São Paulo State. The sedimentary sequence where it was found, located in Fazenda Buriti, is considered Turonian-Santonian in age. The described species -Baurusuchus salgadoensis sp. nov. -is a baurusuchid with an antorbital fenestra, double external nares with a bony septum, two well-fused supraorbitals, the supratemporal fenestrae larger than the orbits and a quadrangular-shaped laterotemporal fenestra. The position of the external nares, located on anterior and terminal portion of the rostrum together with the theropod-like lateral compression of the snout and teeth are indicators that Baurusuchus salgadoensis was a terrestrial crocodyliform. This was a carnivorous species and the lateral compression of the rostrum could be interpreted as a mechanism to increase the skull resistance forces during biting. The pointed, conical teeth, some with crenulated borders, could be used to perforate and to carve the prey. The geological context of Baurusuchus salgadoensis indicates that it probably lived in a hot and arid climate.
Medical and Veterinary Entomology, 2003
The efficacy of ripe fruit extracts of Melia azedarach L. (Rutales: Meliaceae) was evaluated agai... more The efficacy of ripe fruit extracts of Melia azedarach L. (Rutales: Meliaceae) was evaluated against the tick, Boophilus microplus (Canestrini) (Acari: Ixodidae). Ripe fruits of M. azedarach dried and powdered were extracted by Soxhlet apparatus successively using hexane, CHCl 3 and 96% aqueous ethanol. Larvae and engorged females were immersed in decreasing concentrations from 0.25% to 0.015% of each extract. The mortality of larvae was evaluated 24, 72 and 168 h after treatment. The effectiveness of treatment against engorged females was assessed by measuring egg production. All tested extracts caused mortality of B. microplus larvae, with higher mortality rates observed in CHCl 3 (100%) and hexanic extract (98%) than in ethanolic extract (50%) 168 h after treatment. The mortality was dependent on concentration and on time after treatment. Similarly hexanic and CHCl 3 extracts showed higher effectiveness (varying from 14% to 100%) against B. microplus engorged females than ethanolic extract (varying from 0% to 46%). Melia azedarach extracts did not kill the adult females, but inhibited partially or totally egg production and embryogenesis. These results show that the less polar the extract of M. azedarach ripe fruits the more its effectiveness against larvae and engorged females of B. microplus. This plant may therefore be useful in the control of resistant B. microplus populations.
Journal of Ethnopharmacology, 2000
The essential oil from the hydrodistillation of Eugenia dysenterica leaves consisted mainly of b-... more The essential oil from the hydrodistillation of Eugenia dysenterica leaves consisted mainly of b-caryophyllene and a-humulene as the major sesquiterpene, while limonene and a-thujene were the major monoterpene hydrocarbons. The main oxygenated mono and sesquiterpene constituents were a-terpineol and b-caryophyllene oxide, respectively. The oil was investigated against eight strains of Candida albicans, 35 strains of Cryptococcus neoformans var. neoformans, and two C. neoformans var. gattii isolated from HIV-infected individuals with candidosis or cryptococcal meningitis using the agar dilution method. Based on the minimal inhibitory concentration (MIC) values, the most significant results were obtained against Cryptococcus strains. It was observed that 22 strains were inhibited at a concentration of 250 mg/ml, whereas four exhibited potent inhibition with MIC values below 125 mg/ml against 10 6 UFC/ml organisms. We found MICs ] 3.12 mg/ml for 91.6, 50 and 30% of all Cryptococcus strains in relation of amphotericin B, fluconazole and itraconazole, respectively.
Brazilian Journal of Microbiology, 2002
Ethanolic extracts from leaves of Hyptis ovalifolia, H. suaveolens, H. saxatilis, Hyptidendrum ca... more Ethanolic extracts from leaves of Hyptis ovalifolia, H. suaveolens, H. saxatilis, Hyptidendrum canum, Eugenia uniflora, E. dysenterica, Caryocar brasiliensis and Lafoensia pacari were investigated for their antifungal activity against dermatophytes. The most effective plants were H. ovalifolia and E. uniflora, while Trichophyton rubrum was the most sensitive among the four dermatophytes species evaluated. This study has demonstrated antifungal properties of Brazilian Cerrado plant extracts in "in vitro" assays.
Origem: Wikipédia, a enciclopédia livre.