Hypertensive Crisis

O tratamento de uma crise hipertensiva visa controlar os níveis críticos de pressão arterial até níveis hemodinâmicos seguros, que não necessariamente normais. Os autores ressaltam a necessidade para o seu correcto tratamento de um pronto diagnóstico, diferenciando as situações de menor gravidade das de verdadeira urgência hipertensiva, da compreensão da sua fisiopatologia e do conhecimento dos fármacos disponíveis

Electromagnetic hybrid active-passive vehicle suspension system

The suspension systems currently in use can be classified as passive, semi-active and active. The passive suspension systems are the most commonly used due to their low price and high reliability. However, this system can not assure the desired performance from a modem suspension system An important improvement of the suspension performance is achieved by the active systems. Nevertheless, they are only used in a very reduced number of automobile models because they are expensive and complex. Another disadvantage of active systems is the relatively high energy consumption. The use of electromagnetic linear actuators is an alternative for the implementation of active suspensions. Moreover, this solution has the advantage of the suspension energy recovery. In spite of the materials development, the electromagnetic actuators are yet expensive to produce. In this paper it is proposed an hybrid suspension system which combines the simplicity of the passive dampers with the performance of an electromagnetic active suspension. Maintaining the passive damper, it is possible to keep the performance of the active suspension, but using a smaller electromagnetic actuator

Permanent-magnets linear actuators applicability in automobile active suspensions

Significant improvements in automobile suspension performance are achieved by active systems. However, current active suspension systems are too expensive and complex. Developments occurring in power electronics, permanent magnet materials, and microelectronic systems justifies analysis of the possibility of implementing electromagnetic actuators in order to improve the performance of automobile suspension systems without excessively increasing complexity and cost. In this paper, the layouts of hydraulic and electromagnetic active suspensions are compared. The actuator requirements are calculated, and some experimental results proving that electromagnetic suspension could become a reality in the future are shown

Hemorheologic profile in patients with angina pectoris

Thirteen patients (9 men and 4 women) with stable angina, whose ages ranged from 48 to 62 years (mean 57 years), were studied in order to establish the hemorheologic profile consequent to effort as well as some parameters of the oxygen transport system. The results were compared with those obtained from a control group of 8 healthy individuals, 4 men and 4 women, whose ages ranged from 40 to 57 years (mean 48 years). The patients presented values of P50 in vivo during rest (R) higher than the control group (p < 0.05); the filtration time of blood (FT) and the flow rate of erythrocyte filtration (FR) rose significantly from the R to the precocious recovery (Rec) phase, both in the control group (p < 0.01) and in the patients (p < 0.001). There was, therefore, no remarkable difference in these parameters as well as in arterial pH, Hb and Ht at rest and after maximum effort, between the patients and the control group. The lactate presented higher values (p < 0.05) in the control group when only early phase of Rec was taken into account. In the patients there was a significant positive correlation during rest between 2,3-DPG and FT (p < 0.05) and between PSOiv and FT (p < 0.02). This correlation was not found in the control group. It was also found a significant rise of Hi in the early phase of Rec among the patients as opposed to the control group. The results suggest: (a) adaptation of the oxygen transport system in the patients with angina through a rise of oxyhemoglobin dissociation capacity; (b) aggravation of hemorheologic profile after effort, more conspicuous in the patients than in the control group; (c) the system of oxygen transport in the patients seems to be influenced by alterations of hernoiheologic parameters

Limitações dos sistemas de produção dos assentamentos São Francisco (Eldorado dos Carajás, Pará) e agroextrativista Praialta/Piranheira (Nova Ipixuna, Pará).

Este trabalho, ao mesmo tempo em que fornece elementos essenciais à orientação técnico-científica ao uso e ocupação dos recursos naturais de uma região de fronteira da Amazônia Oriental, retoma a discussão sobre a questão agrária no país, particularizando os assentamentos rurais oficiais do Sudeste Paraense.bitstream/item/63437/1/Oriental-Doc138.pd

Desempenho de genótipos de bananeira nos tabuleiros costeiros, sergipe ? 2 ciclo de produção.

A produção mundial de banana é de aproximadamente 102,1 milhões de toneladas em uma área de 4,7 milhões de hectares. O Brasil é o quinto maior produtor 6,9 milhões de toneladas em uma área de 486 mil hectares (1). Apesar de Sergipe ocupar o sétimo lugar em produção na região, com aproximadamente 57 mil toneladas colhidos numa área de aproximadamente quatro mil hectares (2), o cultivo da banana tem grande importância socioeconômica para o Estado.

Queima-das-pontas-das-folhas-do-mamoeiro: nova doença da cultura e instruções de controle.

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