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278608 documents, page 1 of 27861

Frequency, clinical features and risk factors of lacunar infarction (data from a stroke registry in South India).

Kaul S; Venketswamy P; Meena A; Sahay R; Murthy J (2000)
Analysis of 893 patients of ischaemic stroke in the stroke registry of Nizam′s institute of Medical Sciences, Hyderabad is presented. 16% of them had lacunar infarction. The mean age at presentation was 56.9 years and male to female ratio was 3.5:1. The common risk factors included hypertension(62%),diabetes(38%) and smoking(28%). Six percent had an underlying cardiac source of embolism and none had significant (>50%) extracranial carotid atherosclero...

Mineralization of human premolar occlusal fissures. A quantitative histochemical microanalysis

Campos, Antonio; Rodriguez, I.A.; Sanchez-Quevedo, M.C.; García, J.M.; Nieto-Albano, O.H.; Gómez de Ferraris, M.E. (2000)
The mechanisms of cariogenesis in occlusal fissures remain elusive because of limited information about fissure structure and wall mineralization. The purpose of the present study was to determine the correlation between morphological patterns in occlusal fissures in human premolars and quantitative histochemical patterns of mineralization in the walls of these formations. We used scanning electron microscopy and quantitative X-ray microanalysis with the peak-t...

Local and Mean Ramsey Numbers for Trees

Bollobás, B.; Kostochka, A.; Schelp, R.H. (2000)

Assessment of the non-linear behaviour of plastic ankle foot orthoses by the finite element method

Syngellakis, S.; Arnold, M. A.; Rassoulian, H. (2000)
The stiffness characteristics of plastic ankle foot orthoses (AFOs) are studied through finite element modelling and stress analysis. Particular attention is given to the modelling and prediction of non-linear AFO behaviour, which has been frequently observed in previous experimental studies but not fully addressed analytically. Both large deformation effects and material non-linearity are included in the formulation and their individual influence on results assessed. The finite element progr...

A Study of Soil Erosion on a Steep Cultivated Slope in the Mt. Gongga Region near Luding, Sichuan, China, using the 137 Cs Technique

Zhang, X. B.; Quine, T. A.; Walling, D. E.; Wen, A. B. (2000)
This paper reports the results of an investigation of soil erosion on a steep cultivated slope in the Mt Gongga region of the Upper Yangtze River Basin, Southwest China, using the 137Cs technique. The effective 137Cs reference inventory for the study field, estimated from the bottom layer of a 137Cs depth profile at the deposition zones, is 2373.9 Bq/m2, accounting for 65.8% the local 137Cs reference inventory of 3607.7 Bq/m2. It strongly indicates that a considerable amount of 137Cs input ...

Gestação Trigemelar Espontânea: Complicações Maternas e Resultados Perinatais Natural Triplet Pregnancies: Maternal Complications and Perinatal Results

Maria Regina Torloni; Márcia Akemi Kikuti; Márcia Maria Marques da Costa (2000)
Objetivo: avaliar as complicações maternas e os resultados perinatais de gestações trigemelares. Métodos: estudo retrospectivo analisando variáveis maternas e perinatais de todas gestações trigemelares com peso fetal > 500 g ocorridas em 8 anos na Maternidade Escola de Vila Nova Cachoeirinha. Resultados: entre 1990-1998, 18 gestantes deram à luz trigemelares, representando 1:2.060 partos. As principais complicações foram a prematuridade (94,4%) e pré-eclâmpsia (44,4%) e 83,3% das pacientes pr...