In this study we report a patient (A.N.G.) who, following a malignant left frontal meningioma impinging upon Brodmann area 45, presented a 'pure' dynamic aphasia. Her spontaneous speech was markedly reduced in the absence of any syntactical impairment. Her naming, repetition and reading skills were completely normal. Two experimental investigations were carried out. The first investigation foun...

It has been claimed that Lyapunov exponents computed from electroencephalogram or electrocorticogram (ECoG) time series are useful for early prediction of epileptic seizures. We show, by utilizing a paradigmatic chaotic system, that there are two major obstacles that can fundamentally hinder the predictive power of Lyapunov exponents computed from time series: finite-time statistical fluctuatio...

It was taken for granted that poverty led to environmental degradation: poverty is related to massive consumption of raw materials, to overpopulation, and thus to overconsumption of natural resources, and so on. But more recent studies have shown that the poverty–environment link was caused by a combination of several factors. Traditional societies used to have their own system of preserving th...

BACKGROUND Knowledge on how well we can predict primary postpartum hemorrhage (PPH) can help policy makers and health providers design current delivery protocols and PPH case management. The purpose of this paper is to identify risk factors and determine predictive probabilities of those risk factors for primary PPH among women expecting singleton vaginal deliveries in Egypt. METHODS From a p...

In the rat and other species “labile― methyl groups are essential to normal metabolism (5). These are methyl groups which are capable of be ing transferred in toto from one compound to an other by specific enzymes and enzyme cofactors. In the rat the major source of such groups is the diet, which may contain them in the form of such compounds as i@-methionine, choline, betaine, and possibly...

Studies made in the field of microbiological degradation of lignin have included investigations with sodium and calcium lignosulfonates. Kazanskii and Mikhailova (1936) were unable to grow several wood-rotting fungi on neutralized waste sulfite liquor, but found that infusorial earth mixed cultures could grow albeit slowly (in 50-60 days) if several alterations were made in the composition of t...

PURPOSE People with migraine are relatively poor at judging the direction of motion of coherently moving signal dots when interspersed with noise dots drifting in random directions, a task known as motion coherence. Although this has been taken as evidence of impoverished global pooling of motion signals, it could also arise from unreliable coding of local direction (of each dot), or an inabili...

The 30-micrograms cefprozil disk and the cephalosporin class (30-micrograms cephalothin) disk were compared for their abilities to predict cefprozil susceptibility by agar disk diffusion testing. High error (5.02% major and 14.11% minor) rates were encountered with the cephalothin disk and were most frequently observed for Escherichia coli and Enterococcus faecalis. The cefprozil disks resulted...

Mittal and coworkers recently (1) analyzed the spatial organization of folded proteins backbone and advocated an alternative hypothesis on protein folding stating that specific interactions among amino acids do not drive protein folding. The authors analyzed spatial distributions of Cα atoms for all amino acid pairs in about four thousands proteins available in PDB database and they found that ...