The outcome of cerebral vasospasm in aged patients with ruptured intracranial aneurysms was compared with that in younger patients. Patients with brain damage due to previous stroke, in tracerebral hematoma, or surgical complications were excluded from the study. The study popula tion consisted of 143 patients hospitalized between 1982 and 1986. Neck clipping of ruptured aneurysms and co...

The energetic cost of activation was measured during an isometric tetanus of white muscle fibres from the dogfish Scyliorhinus canicula. The total heat production by the fibres was taken as a measure of the total energetic cost. This energy consists of two parts. One is due to crossbridge interaction which produces isometric force, and this part varies linearly with the degree of filament overl...

BACKGROUND To define the profile of age-related differences in cognition in healthy middle-aged adults in order to identify the most sensitive measures of early cognitive decline. To study whether these differences precede cognitive decline in the elderly. METHOD 141 cognitively normal participants (101 middle-aged adults with age 40-50±2; and 40 elderly individuals with age 65±...

Methane oxidation associated with the belowground tissues of a common aquatic macrophyte, the burweed Sparganium eurycarpum, was assayed in situ by a chamber technique with acetylene or methyl fluoride as a methanotrophic inhibitor at a headspace concentration of 3 to 4%. Acetylene and methyl fluoride inhibited both methane oxidation and peat methanogenesis. However, inhibition of methanogenesi...

Varicocele is the most common and surgically correctible cause of male infertility in men attending to infertility clinics. Infertility affects 15% of all couples and male factor is the primary or contributing cause in 40% to 60% of cases. Varicocele has been shown to cause male infertility in about 15% of infertile couples. Molecular mechanisms responsible from varicocele induced testicular dy...

Noninvasive measurement of human spinal cord blood flow (SCBF) has not yet been established. The authors successfully measured human SCBF by using xenon and a CT scanner (Shuttle method). This method was clinically applied in 10 patients without spinal cord pathology . Mean SCBF of the normal adult at the C5 level was 42.3 ± 6.3 l/ 100 g/min. CO2 reactivity i...

Interest on Trinitario cocoa has continuously increased due to the fact that some genotypes of this group had inherited characters vigorosity from Forastero and flavor grade Criollo. The pronounced incompatibility between clones orientates research crossing with other varieties in order increase productivity beans quality. Polyphenols methylxanthines are bioactive compounds responsible for heal...