José Peres - Academia.edu (original) (raw)

Papers by José Peres

International Journal of Environmental Research and Public Health, 2020

Histidine-rich proteins 2 and 3 gene (pfhrp2 and pfhrp3) deletions affect the efficacy of rapid d... more Histidine-rich proteins 2 and 3 gene (pfhrp2 and pfhrp3) deletions affect the efficacy of rapid diagnostic tests (RDTs) based on the histidine-rich protein 2 (HRP2), compromising the correct identification of the Plasmodium falciparum species. Therefore, molecular surveillance is necessary for the investigation of the actual prevalence of this phenomenon and the extent of the disappearance of these genes in these areas and other South American countries, thus guiding national malaria control programs on the appropriate use of RDTs. This study aimed to evaluate the pfhrp2 and pfhrp3 gene deletion in P. falciparum in endemic areas of the Brazilian Amazon. Aliquots of DNA from the biorepository of the Laboratory of Basic Research in Malaria, Evandro Chagas Institute, with a positive diagnosis for P. falciparum infection as determined by microscopy and molecular assays, were included. Monoinfection was confirmed by nested-polymerase chain reaction assay, and DNA quality was assessed by ...

IRRIGA, 2016

SOIL SOLUTION DYNAMICS FOR DRIP FERTIGATION MANAGEMENT IN BELL PEPPER CROP BRUNO DE LIMA SANTORO... more SOIL SOLUTION DYNAMICS FOR DRIP FERTIGATION MANAGEMENT IN BELL PEPPER CROP BRUNO DE LIMA SANTORO1; REGINA CÉLIA DE MATOS PIRES2; JOSÉ GEANINI PERES3 E CLAUDINEI FONSECA SOUZA3 1Doutorando, Faculdade de Engenharia Agrícola, Universidade Estadual de Campinas, Campinas, SP. blsantoro@hotmail.com2Pesquisadora, Instituto Agronômico de Campinas, Campinas, SP. rcmpires@iac.sp.gov.br3Professor, Departamento de Recursos Naturais e Proteção Ambiental, Centro de Ciências Agrárias, Universidade Federal de São Carlos, Rodovia Anhanguera, km 174, 13600-970, Araras, SP. jogepe@cca,ufscar.br; cfsouza@cca.ufscar.br 1 ABSTRACT The success of drip irrigation compared to various other irrigation systems is attributed primarily to its superior water delivery to plant root zones and high efficiency in water use. This work aimed at studying the distribution and storage of soil solution in the soil profile, and the uptake of nutrients through the roots of pepper plants, irrigated through a drip fertigati...

Engenharia Agrícola, 2016

RESUMO O bagaço de cana-de-açúcar pode ser utilizado como suporte sólido para cultivo de microrga... more RESUMO O bagaço de cana-de-açúcar pode ser utilizado como suporte sólido para cultivo de microrganismos, e apesar de fundamental, o monitoramento da umidade em tempo real nesses processos ainda é pouco pesquisado. Sendo assim, o presente trabalho teve como objetivo propor e validar a TDR para estimar a umidade em bagaço de cana-de-açúcar, visando a seu uso como suporte para cultivo em estado sólido, considerando a produção de ácido cítrico. A sonda de TDR proposta foi analisada fisicamente, e, posteriormente, para a validação dos resultados, realizou-se uma calibração com leituras da constante dielétrica do bagaço de cana-de-açúcar até à saturação do material, os quais foram comparados com o método-padrão e equação universal de Topp. Também, foram conduzidas em colunas de leito fixo preenchidas com bagaço a 80% de umidade, com monitoramento da umidade através de sonda de TDR para validar a técnica. Pôde-se verificar que existe viabilidade no uso da técnica da TDR para estimar a umid...

Ambiente e Agua - An Interdisciplinary Journal of Applied Science, 2010

Phytomedicine, 2008

Esenbeckia febrifuga (Rutaceae) is a plant traditionally used to treat malaria in the Brazilian A... more Esenbeckia febrifuga (Rutaceae) is a plant traditionally used to treat malaria in the Brazilian Amazon region. Ethanol extract of stems displayed a good antiplasmodial activity against Plasmodium falciparum strains W-2 (IC 50 15.570.71 mg/ml) and 3 D7 (IC 50 21.071.4 mg/ml). Two coumarins (bergaptene 1 and isopimpinellin 2), five alkaloids (flindersiamine 3, kokusaginine 4, skimmiamine 5, g-fagarine 6 and 1-hydroxy-3-methoxy-N-methylacridone, 7), besides a limonoid (rutaevine 8), have been isolated for the first time from this species. Antiplasmodial activity of compounds 3, 5-8 has been evaluated in vitro against P. falciparum strains (W-2 and 3D7) and the furoquinolines 5 and 6 were the most potent displaying IC 50 values o50 mg/ml; flindersiamine (3) showed a weak activity while alkaloid 7 and rutaevine (8) were inactive (IC 50 4100 mg/ml).

Irriga, 2013

Drip irrigation has been increasingly used, mainly because of its greater efficiency in water app... more Drip irrigation has been increasingly used, mainly because of its greater efficiency in water application. The objective of this experiment was to monitor the distribution of soil solution as a function of different application rates through fertigation to characterize root development and fruit yield of the pepper plant. The readings of TDR probes allowed estimates of water content

2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010, 2010

The principal objective of a drip system design is to choose the appropriate layout and component... more The principal objective of a drip system design is to choose the appropriate layout and components to obtain adequate soil solution distribution throughout a field. In addition to maximizing crop production, modern fertigation practices must consider environmental ...

Anais da Academia Brasileira de Ciências, 2012

Ethnomedicinal informations point to some Aspidosperma species (Apocynaceae) as antimalarial plan... more Ethnomedicinal informations point to some Aspidosperma species (Apocynaceae) as antimalarial plants in Brazil and have motivated the evaluation of six species which were collected in the state of Minas Gerais: A. cylindrocarpon Müll. Arg., A. parvifolium A. DC., A. olivaceum Müll. Arg., A. ramiflorum Müll. Arg., A. spruceanum Benth. ex Müll. Arg. and A. tomentosum Mart.. A total of 23 extracts of different plant parts in different solvents were assayed in vitro against chloroquine-resistant (W2) and chloroquine-sensitive (3D7) strains of Plasmodium falciparum. All the extracts were shown to be active with IC50 values in the range of 5.0 ± 0 2.8 µg/mL to 65.0 ± 4.2 µg/mL. TLC profile of the extracts revealed the presence of alkaloids in the six species assayed. These results seem to confirm the popular use of Aspidosperma species to treat human malaria in Brazil and seem point to alkaloids as the putative active compounds of the assayed species.