Os minerais naturais pirita e chalcopirita tem sido usados como sensores em eletrodos indicadores usando acetronitrila e propionitrila como solventes. Os resultados mostram vantagens excepcionais da pirita e chacopirita como sensores eletroquímicos e também a possibilidade de aplicação desses eletrodos para determinações em solventes não aquosos onde eletrodos de vidro mostram dificuldades. O c...

We present the basic elements of a generalization of symmetric function theory involving functions of commuting and anticommuting (Grassmannian) variables. These new functions, called symmetric functions in superspace, are invariant under the diagonal action of the symmetric group on the sets of commuting and anticommuting variables. In this work, we present the superspace extension of the clas...

Sr. Editor. En educación médica resulta fundamental el aprendizaje de ciencias básicas, puesto que constituyen las bases sobre las cuales se construirá el conocimiento clínico. Durante la formación médica, las materias básicas, a menudo, son percibidas por el estudiante como complejas y sin conexión con la carrera, habitualmente el estudiante no comprende la importancia del aprendizaje de temas...

This paper computes first the internal rates of return of different population cohorts. Secondly, we study the intragenerational aspects by calculating the returns over life-time contributions for workers of different categories, grouped by earnings, gender and marital status. Under a set of assumptions on contribution rates and wage profiles –in absence of actual data on longitudinal contribut...

BACKGROUND & OBJECTIVES The objective of this study was to evaluate the elderly quality of life of people covered by the healthcare centers in Tehran and its influencing demographic and background factors. METHOD This is a cross-sectional study of quality of life of the elderly population covered by healthcare centers and bases in Tehran, as well as the influential background and demographic ...

Resumo—Este trabalho investiga o papel da análise de componentes principais e da análise de discriminante na classificação de padrões e expora seus problemas com classes assimétricas e/ou dados de treinamento desbalanceados, descrevendo o PCA assimétrico. Para avaliar o comportamento da abordagem assimétrica, emprega-se a tarefa de detecção de objetos em imagens com duas bases distintas (faces ...

OBJECTIVE To study acid-base status during a constant-load treadmill test at exercise levels close to the maximum lactate steady-state. DESIGN Two tests were performed: one maximal and one steady-state at a load corresponding to the mean of the two ventilatory thresholds observed in the first test. SETTING University Sports Science Laboratory. PARTICIPANTS Twenty-three male Sports Science...

Both an arterial blood gas and a basic metabolic panel are necessary to determine a patient’s acid-base status. Analysis of a patient’s acid-base disorder includes identification of the primary disorder, calculation of the anion gap (AG), evaluation for the presence of excess acid or base, comparison of the expected and actual compensation, and explanation of the cause of each identified acid-b...

Background. The main deposits of Donbass and their mineral resource potential are considered. Aim. To develop a strategy for the socio-economic development under contemporary political economic conditions, with focus on human capital further integration Russian Federation, CIS, friendly countries. Materials methods. A multipronged approach was used to define contours, directions, stages Donbass...