Produtividade da mandioca em resposta ao espaçamento e adubação de cobertura potássica no Brejo Paraibano

Manihot (Manihot esculenta Crantz) is a crop of great importance in Brazil, mainly because it is part of the food base of a large part of the national population. Thus, studies on the combinations of the spatial distribution of plants with the appropriate nutritional management, are essential to obtain good agronomic results for this crop. In this context, the present work aimed to analyze the productive performance of cassava under different spacings and the presence and absence of potash fertilization. The experiment was conducted at the Chã do Jardim Experimental Farm, belonging to the Federal University of Paraíba and located in the city of Areia, Paraíba. The variety SRT 1105 roxinha was used, using a randomized block design, with a factorial 3 x 2 (three spacings with and without potassium fertilization in the cover) in four replications. Evaluations of the vegetative development of the crop were made at the time of harvest using 5 plants of the plot area for the measurement of plant height (cm) and stem diameter (cm). For the roots the length (cm), diameter (cm), individual weight (kg) and yield (t.ha-1) were analyzed. The data were submitted to analysis of variance and the means were compared by the Tukey test at 5% probability using the statistical program Sisvar. Significant effect was observed at 5%, by Test F, of spacing under plant height (AP). For the spacing versus potash interaction, a significant effect was also observed at 5% for plant height (AP). For the other variables, no significant effect of any of the sources of variation was observed. The application of Potassium at 180 days did not promote productivity increase for the Roxinha Variety, nor did it influence the other variables analyzed.A mandioca (Manihot esculenta Crantz) é uma cultura de grande importância no Brasil, principalmente por fazer parte da base da alimentação de boa parte da população nacional. Assim, estudos sobre as combinações da distribuição espacial de plantas com o manejo nutricional adequado, tornam-se essenciais para a obtenção de bons resultados agronômicos para essa cultura. Nesse contexto, o presente trabalho objetivou analisar o desempenho produtivo da mandioca sob diferentes espaçamentos e a presença e ausência de adubação potássica de cobertura. O experimento foi conduzido na Fazenda Experimental Chã do Jardim, pertencente a Universidade Federal da Paraíba e localizada no município de Areia, Paraíba. Utilizou-se a variedade SRT 1105 roxinha, sendo empregado delineamento de blocos ao acaso, com fatorial 3 x 2 (três espaçamentos com e sem adubação potássica em cobertura) em quatro repetições. As avaliações do desenvolvimento vegetativo da cultura foram feitas no momento da colheita utilizando-se 5 plantas da área útil da parcela para a mensuração da altura de planta (cm) e diâmetro do caule (cm). Para as raízes foram analisados o comprimento (cm), diâmetro (cm), peso individual (Kg) e a produtividade (t ha-1). Os dados foram submetidos a análise de variância e as médias comparadas pelo teste de Tukey a 5% de probabilidade através do programa estatístico Sisvar. Observou-se efeito significativo a 5%, pelo Teste F, do espaçamento sob a altura de plantas (AP). Para a interação espaçamento versus Potássio, encontrou-se efeito significativo a 5% também para a altura de plantas (AP). Para as demais variáveis não se observou efeito significativo de nenhuma das fontes de variação. A aplicação de Potássio aos 180 dias e os espaçamentos de 0,7;10 e 1,3m não promoveram incremento de produtividade para a Variedade Roxinha, assim como não influenciaram as outras variáveis analisadas

Petróleo no RN: Uma avaliação econômica sobre a produção histórica e perspectivas futuras / Petroleum in Rio Grande do Norte: An economic review on the historical production and the future prospects

Esse trabalho apresenta uma visão histórica sobre a produção de petróleo no Rio Grande do Norte, desde o início da exploração até os dias atuais, e uma análise econômica sobre a evolução deste setor produtivo e expectativas futuras para a economia local. São discutidos os fatores que levaram ao desenvolvimento do setor, a importância histórica e atual da indústria petrolífera para a economia local, e uma visão futura sobre a continuidade da atividade produtiva no estado, em meio às incertezas macroeconômicas atuais. O trabalho utiliza como metodologia um resgate aos acontecimentos históricos que acompanharam o desenvolvimento da indústria do petróleo no Brasil e no mundo, incluindo a ocorrência de choques de petróleo e o incentivo à atividade exploratória, com os seus reflexos para o Rio Grande do Norte; alinhada a uma análise quantitativa sobre a produção histórica e projeções futuras do setor. São discutidas as ameaças internas e externas para a realização de novos investimentos no setor, e o potencial existente, ainda a ser explorado no estado, que tentam sinalizar a continuidade do setor na economia local. Como resultado, são apresentados indicadores da produção que tentam responder sobre a durabilidade dos reservatórios e minimizar as incertezas sobre a continuidade da atividade no estado

Productividad de la yuca en respuesta al espaciamiento y la fertilización con potasio de la cubierta en Brejo Paraibano

O presente trabalho objetivou analisar o desempenho produtivo da mandioca sob diferentes espaçamentos e a presença e ausência de adubação potássica de cobertura. O experimento foi conduzido em área experimental no município de Areia, Paraíba. Utilizou-se a variedade SRT 1105 roxinha, sendo empregado delineamento de blocos casualisados, com fatorial 3 x 2 (três espaçamentos com e sem adubação potássica em cobertura) em quatro repetições. As avaliações do desenvolvimento vegetativo da cultura foram feitas no momento da colheita, na qual foram mensurados a altura de planta (cm) e diâmetro do caule (cm). Para as raízes foram analisados o comprimento (cm), diâmetro (cm), peso individual (Kg) e a produtividade (t ha-1). Os dados foram submetidos a análise de variância e as médias comparadas pelo teste de Tukey a 5% de probabilidade. Observou-se efeito significativo a 5%, do espaçamento sob a altura de plantas (AP). Para a interação espaçamento versus Potássio, encontrou-se efeito significativo a 5% também para a altura de plantas (AP). Para as demais variáveis não se observou efeito significativo de nenhuma das fontes de variação. A aplicação de Potássio aos 180 dias e os espaçamentos de 0,7;10 e 1,3m não promoveram incremento de produtividade para a variedade Roxinha

Association of Malaria Infection During Pregnancy With Head Circumference of Newborns in the Brazilian Amazon.

Importance: Malaria during pregnancy is associated with adverse events for the fetus and newborn, but the association of malaria during pregnancy with the head circumference of the newborn is unclear. Objective: To investigate the association of malaria during pregnancy with fetal head growth. Design, Setting, and Participants: Two cohort studies were conducted at the general maternity hospital of Cruzeiro do Sul (Acre, Brazil) in the Amazonian region. One cohort study prospectively enrolled noninfected and malaria-infected pregnant women who were followed up until delivery, between January 2013 and April 2015. The other cohort study was assembled retrospectively using clinical and malaria data from all deliveries that occurred between January 2012 and December 2013. Data analyses were conducted from January to August 2017 and revised in November 2018. Clinical data from pregnant women and anthropometric measures of their newborns were evaluated. A total of 600 pregnant women were enrolled through volunteer sampling (prospective cohort study), and 4697 pregnant women were selected by population-based sampling (retrospective cohort study). After application of exclusion criteria, data from 251 (prospective cohort study) and 232 (retrospective cohort study) malaria-infected and 158 (prospective cohort study) and 3650 (retrospective cohort study) noninfected women were evaluated. Exposure: Malaria during pregnancy. Main Outcomes and Measures: The primary end point was the incidence of altered head circumference in newborns delivered from malaria-infected mothers compared with that from noninfected mothers. Secondary end points included measures of placental pathology relative to newborn head circumference. Results: In total, 4291 maternal-child pairs were analyzed. Among 409 newborns in the prospective cohort study, the mothers of 251 newborns had malaria during pregnancy, infected with Plasmodium vivax, Plasmodium falciparum, or both. Among 3882 newborns in the retrospective cohort study, 232 were born from mothers that had malaria during pregnancy. The prevalence of newborns with a small head (19 [30.7%] in the prospective cohort study and 30 [36.6%] in the retrospective cohort study) and the prevalence of microcephaly among newborns (5 [8.1%] in the prospective cohort study and 6 [7.3%] in the retrospective cohort study) were higher among newborns from women infected with P falciparum during pregnancy. Multivariate logistic regression analyses revealed that P falciparum infection during pregnancy represented a significant risk factor for the occurrence of small head circumference in newborns (prospective cohort study: odds ratio, 3.15; 95% CI, 1.52-6.53; P = .002; retrospective cohort study: odds ratio, 1.91; 95% CI, 1.21-3.04; P = .006). Placental pathologic findings corroborated this association, with more syncytial nuclear aggregates and inflammatory infiltrates occurring in placentas of newborns born with decreased head circumference. Conclusions and Relevance: This study indicates that falciparum malaria during pregnancy is associated with decreased head circumference in newborns, which is in turn associated with evidence of placental malaria

Neurostimulation Combined With Cognitive Intervention in Alzheimer’s Disease (NeuroAD): Study Protocol of Double-Blind, Randomized, Factorial Clinical Trial

Despite advances in the treatment of Alzheimer’s disease (AD), there is currently no prospect of a cure, and evidence shows that multifactorial interventions can benefit patients. A promising therapeutic alternative is the use of transcranial direct current stimulation (tDCS) simultaneously with cognitive intervention. The combination of these non-pharmacological techniques is apparently a safe and accessible approach. This study protocol aims to compare the efficacy of tDCS and cognitive intervention in a double-blind, randomized and factorial clinical trial. One hundred participants diagnosed with mild-stage AD will be randomized to receive both tDCS and cognitive intervention, tDCS, cognitive intervention, or placebo. The treatment will last 8 weeks, with a 12-month follow-up. The primary outcome will be the improvement of global cognitive functions, evaluated by the AD Assessment Scale, cognitive subscale (ADAS-Cog). The secondary outcomes will include measures of functional, affective, and behavioral components, as well as a neurophysiological marker (Brain-derived neurotrophic factor, BDNF). This study will enable us to assess, both in the short and long term, whether tDCS is more effective than the placebo and to examine the effects of combined therapy (tDCS and cognitive intervention) and isolated treatments (tDCS vs. cognitive intervention) on patients with AD.Clinical Trial Registration: www.ClinicalTrials.gov, identifier NCT02772185—May 5, 2016

Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV

The performance of muon reconstruction, identification, and triggering in CMS has been studied using 40 inverse picobarns of data collected in pp collisions at sqrt(s) = 7 TeV at the LHC in 2010. A few benchmark sets of selection criteria covering a wide range of physics analysis needs have been examined. For all considered selections, the efficiency to reconstruct and identify a muon with a transverse momentum pT larger than a few GeV is above 95% over the whole region of pseudorapidity covered by the CMS muon system, abs(eta) < 2.4, while the probability to misidentify a hadron as a muon is well below 1%. The efficiency to trigger on single muons with pT above a few GeV is higher than 90% over the full eta range, and typically substantially better. The overall momentum scale is measured to a precision of 0.2% with muons from Z decays. The transverse momentum resolution varies from 1% to 6% depending on pseudorapidity for muons with pT below 100 GeV and, using cosmic rays, it is shown to be better than 10% in the central region up to pT = 1 TeV. Observed distributions of all quantities are well reproduced by the Monte Carlo simulation.Comment: Replaced with published version. Added journal reference and DO