Tuning the metamagnetism of an antiferromagnetic metal

We describe a `disordered local moment' (DLM) first-principles electronic structure theory which demonstrates that tricritical metamagnetism can arise in an antiferromagnetic metal due to the dependence of local moment interactions on the magnetisation state. Itinerant electrons can therefore play a defining role in metamagnetism in the absence of large magnetic anisotropy. Our model is used to accurately predict the temperature dependence of the metamagnetic critical fields in CoMnSi-based alloys, explaining the sensitivity of metamagnetism to Mn-Mn separations and compositional variations found previously. We thus provide a finite-temperature framework for modelling and predicting new metamagnets of interest in applications such as magnetic cooling

VPRO - um identificador de padrões de seqüências.

bitstream/CNPTIA/11542/1/ct81.pdfAcesso em: 28 maio 2008

Coleção de fungos patogênicos de espécies florestais.

EVINCI. Resumo

Podridão do colo (Sclerotium rolfsii Sacc.) em pimenta salada ou pimenta doce (Capsicum annum) no Estado do Amapá.

A cultura da pimenta salada é uma importante fonte de renda para o agricultor amapaense. É também conhecida como pimenta do cheiro ou pimenta doce, no Amapá. Em levantamentos efetuados nos diversos municípios do estado, através de um projeto em parceria entre o Centro de Pesquisa Agroflorestal do Amapá - Embrapa Amapá e o Instituto de Pesquisa Florestal do Amapá, verificou-se a ocorrência de um fungo de solo (Sclerotium rolfsii Sacc.) que ocasiona a murcha de plantas de pimenta salada, descrito pela primeira vez por Rolfs, em 1892, em tomateiros na Flórida, Estados Unidos e segundo Moraes (1982), tal fungo apresenta uma maior distribuição em regiões tropicais e subtropicais, onde a alta temperatura prevalece durante as estações chuvosas.bitstream/item/97385/1/CPAF-AP-2002-Podridao-colo.pd

Avaliação nutricional de subprodutos do processamento agroindustrial de cupuaçu, pupunha e castanha-do-brasil em Porto Velho, Rondônia.

Diversos subprodutos da agroindústria podem ser utilizados na alimentação de ruminantes, contribuindo de forma significativa na redução dos custos com a alimentação do rebanho. A composição química e bromatológica, bem como os parâmetros de degradação ruminal da matéria seca (MS) e da proteína bruta (PB) dos subprodutos das extrações do óleo da castanhado-brasil (Bertholletia excelsa, H.B.K.), da manteiga das amêndoas do cupuaçu (Theobroma grandiflorum) e da semente do fruto da pupunha (Bactris gasipaes, Kunth) foram determinados nesse estudo. Para tanto, foram realizadas análises laboratoriais e um ensaio de degradabilidade in situ com três novilhas canuladas no rúmen para incubação de amostras dos subprodutos por 2, 4, 6, 8, 12, 24 e 48 horas. A torta de cupuaçu apresentou 93,52% de MS; 12,59% de PB; 12,33% de extrato etéreo (EE); 4,36% de cinzas (CZ), coeficientes de degradabilidade potencial (DP) da MS de 55,71% e da PB de 93,22; a farinha de pupunha apresentou 94,35% de MS; 5,84% de PB, 21,95% de EE; 1,43% de CZ, DP da MS de 88,84% e da PB de 99,57; e a torta de castanha apresentou 95,32% de MS; 34,22% de PB; 43,59% de EE; 3,37% de CZ, DP da MS de 89,27% e da PB de 97,76%. De acordo com os teores de PB dos subprodutos avaliados, a torta de castanha foi classificada como concentrado proteico e os outros dois como concentrados energéticos. Com exceção da torta de cupuaçu, os subprodutos apresentaram matéria seca e proteína com elevada degradabilidade ruminal.bitstream/item/139149/1/BPD-72-alimentacaoderuminantes.pd

Costs Associated with Malaria in Pregnancy in the Brazilian Amazon, a Low Endemic Area Where Plasmodium vivax Predominates.

BACKGROUND: Information on costs associated with malaria in pregnancy (MiP) in low transmission areas where Plasmodium vivax predominates is so far missing. This study estimates health system and patient costs of MiP in the Brazilian Amazon. METHODS/PRINCIPAL FINDINGS: Between January 2011 and March 2012 patient costs for the treatment of MiP were collected through an exit survey at a tertiary referral hospital and at a primary health care centre in the Manaus metropolitan area, Amazonas state. Pregnant and post-partum women diagnosed with malaria were interviewed after an outpatient consultation or at discharge after admission. Seventy-three interviews were included in the analysis. Ninety-six percent of episodes were due to P. vivax and 4% to Plasmodium falciparum. In 2010, the total median costs from the patient perspective were estimated at US $45.91 and US$216.29 for an outpatient consultation and an admission, respectively. When multiple P. vivax infections during the same pregnancy were considered, patient costs increased up to US $335.85, representing the costs of an admission plus an outpatient consultation. Provider direct and overhead cost data were obtained from several sources. The provider cost associated with an outpatient case, which includes several consultations at the tertiary hospital was US$103.51 for a P. vivax malaria episode and US $83.59 for a P. falciparum malaria episode. The cost of an inpatient day and average admission of 3 days was US$118.51 and US $355.53, respectively. Total provider costs for the diagnosis and treatment of all malaria cases reported in pregnant women in Manaus in 2010 (N = 364) were US$17,038.50, of which 92.4% (US$ 15,741.14) due to P. vivax infection. CONCLUSION: Despite being an area of low risk malaria transmission, MiP is responsible for a significant economic burden in Manaus. Especially when multiple infections are considered, costs associated with P. vivax are higher than costs associated with P. falciparum. The information generated may help health policy decisions for the current control and future elimination of malaria in the area

Alcoóis lineares em solos arqueológicos da Amazônia.

Pôster

Development and validation of The Breaking Bad News Attitudes Scale

Background: Communication of bad news plays a critical role in the physician-patient relationship, and a variety of consensus guidelines have been developed to this purpose, including the SPIKES protocol. However, little is known about physicians’ attitudes towards breaking bad news and to be trained to deliver it. This study aimed to develop and validate a self-report questionnaire to assess physicians’ attitudes towards principles of the SPIKES protocol and training on them. Methods: The Breaking Bad News Attitudes Scale (BBNAS) was administered to 484 pediatricians and 79 medical students, recruited at two scientific conferences and two medical schools in Brazil. The questionnaire structural validity, reliability, and associations with other variables were tested. Results: The BBNAS showed adequate validity and good reliability, with two factors measuring attitudes towards the SPIKES strategy for braking bad news (α = 0.81) and the possibility to be trained on it (α = 0.77), respectively. Conclusion: The novel questionnaire is a psychometrically sound measure that provides information on physicians’ agreement with the SPIKES protocol. The BBNAS can provide useful information for planning training and continuing education programs for clinicians on communication of bad news using the SPIKES as a framework