Metals in particulate matter (PM) are considered a driving factor for many pathologies. Despite the hazards associated with particulate metals, personal exposures for at-risk workers are rarely assessed due to the cost and effort associated with monitoring. As a result, routine exposure assessments are performed for only a small fraction of the exposed workforce. The objective of this research ...

The concentrations of zinc (Zn), iron (Fe) and copper (Cu) in both human milk and infant formula were determined using a new sample preparation method, by inductively coupled plasma - optical emission spectometry (ICP-OES) and flame atomic absorption spectrometry (FAAS). Human milk samples were diluted in ultrapure water. The infant formula of powder samples (suitable for an infant 1-6 months o...

The quantitative analysis of glutathione (GSH) is important in different fields like medicine, biology, and biotechnology. Accurate quantitative measurements of this analyte have been hampered by the lack of well characterized reference standards. The proposed procedure is intended to provide an accurate and definitive method for the quantitation of GSH for reference measurements. Measurement o...

We have compared the analytical results obtained by inductively coupled plasma optical emission spectroscopy (ICP-OES) and by scanning electron microscopy with an energy dispersive X-ray analytical system (SEM-EDX) in order to explore the mechanism of metal ions biosorption by biomass using two independent methods. The marine macroalga Enteromorpha sp. was enriched with Cu(II), Mn(II), Zn(II), ...

Resumo As redes ATM (Asvnchronous Transfer Mode) foram concebidas consider;ndo a utiliza«ii'a de meios de transmissiio 6pticos, que apresentam taxa de erro de bit pequena. Urn dos principais problemas de se utilizar 0 ATM em redes sem fio esta relacionado a taxa de erro, que e variavel e pode assumir valores elevados. Para contornar este problema, mecanismos adicionais de controle de erro devem...

Molar crown morphology varies among primates from relatively simple in some taxa to more complex in others, with such variability having both functional and taxonomic significance. In addition to the primary cusps, crown surface complexity derives from the presence of crests, cuspules, and crenulations. Developmentally, this complexity results from the deposition of an enamel cap over a basemen...

Oculo-ectodermal syndrome (OES - OMIM 600628), also known as Toriello Lacassie Droste syndrome, is a very rare condition, first described by Toriello et al., in 1993. OES has been proposed to be a mild variant of encephalocraniocutaneous lipomatosis (ECCL). It is characterized by aplasia cutis congenita (ACC), epibulbar dermoids, coarctation of the aorta, arachnoid cysts in the brain, seizure d...

The production of nuclear fuel used in the research reactor at Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP) requires a series of chemical and metallurgical processes. The quality of the end product depends on the control over all the stages of the manufacturing process and over the quality of raw materials employed. In fact, spectrometric methods are increasingly used as quanti...

We present a general approach for formally modelling states of object-oriented programs using OBJ 10] speciications and associated order-sorted theory presentations 9]. This formal model can then be used to deene the structural operational semantics 14] of object-oriented languages. Our approach has the advantage of using the power of the theory of abstract data types for deening operations on ...

BACKGROUND/AIM Oral examinations are required for board certification in Ophthalmology in the USA. The current literature offers no recommendation on the number of administrations during residency. The purpose of this study was to determine how often oral examinations (OEs) should be administered and what effects repeated OEs might have on residents' comfort level with OEs and confidence level ...