Blood glucose level in hepato-intestinal schistosomiasis

Comparative oral glucose tolerance test performed in 30 patients with hepato-intestinal schistosomiasis and 30 controls, showed that the mean value of glycemia in the former group was superior. However, none of these patients show a diabetic G.T.T. curve.     

Inventory of technological characteristics,mining types and calculated reserves of natural sands in the great Sao Paulo region—Brazil

Considering that the volume of natural sand used in the Great Sao Paulo Region (12 million inhabitants) is presently estimated at about 700,000 cubic metres per month (gross volume of US $ 3,5 million) and that there is no organized information about this mineral resource available, the authors think it is high time to develop a research programme on this subject. After a bibliographic survey on the regional geology, extensive fieldwork was carried out and the samples collected were tested in the laboratory to obtain the mineralogical, granulometric, chemical and technological characteristics. Also studied was the regional mining types, the calculated reserves and the actual production of the ninety existing mines.     

GTAW焊接过程中熔池发展的数值模拟及与实验结果的比较

用描述等离子弧和熔池中的流体流动和传热过程的数学模型对熔池的发生进行了数值模拟，模拟结果和文献中实验结果的比较表明，该数学模型能较好地预测熔池的形状和大小，模拟结果中所得到的双循环流动对理解实验所得的测熔池的形状有重要意义。     

Characterization of polyelectrolyte effect in poly(acrylic acid) solutions

The viscometric behavior of poly(acrylic acid) solutions, as well as their ion transport properties, were monitored as a function of polymer concentration and the addition of KOH in nonisoionic conditions. Polyelectrolyte effect was studied and characterized by conductivimetry as well as viscometric properties at the infinite dilution limit. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 191–196, 2003     

Regionally specific properties of midbrain glia: I. Interactions with midbrain neurons

Regional astrocyte cultures were obtained by dissecting and dissociating medial and lateral sectors of the midbrain from 14-day Swiss mouse embryos. Once confluent, these cultures were tested by glial fibrillary acidic protein (GFAP) immunocytochemistry to confirm their astrocyte composition and for 2'-3' cyclic nucleotide 3'-phosphohydrolase (CNPase) and microtubule-associated protein 2 (MAP2) immunocytochemistry to rule out oligodendroglial and neuronal components, respectively. In confluent astrocyte cultures from either sector, virtually all cells were GFAP-positive elements, most of which were flat cells accompanied by smaller numbers of flat cells with processes. Confluent astrocyte cultures, derived from medial (M) or lateral (L) sectors, were used as substrata for culturing dissociated cells from medial (m) or lateral (l) sectors of 14-day embryonic midbrains. Fixed cocultures (Ll, Lm, Mm, Ml) were stained with an anti-MAP2 antibody to verify neuronal aggregation and neuritic morphology. In spite of the morphological constancy of glial substrata at plating, MAP2-positive cells in cocultures showed differences in the aggregation of somata and in the length, caliber, and branching of neurites. These differences, which depend mostly on the sector of origin of astrocytes, suggest that the substrata may differ in adhesiveness and/or growth-promoting vs. growth-interfering properties. Together with evidence for sectorial heterogeneity in brainstem radial glia, the present results raise the possibility that cultured astrocytes have properties that reflect the roles played by their parent radial glia in the developing brain.