Efficient object location determination and error analysis based on barycentric coordinates.

In this paper, we propose an efficient computational method for converting local coordinates to world coordinates using specially structured coordinate data. The problem in question is the computation of world coordinates of an object throughout a motion, assuming that we only know the changing coordinates of some fixed surrounding reference points in the local coordinate system of the object. The proposed method is based on barycentric coordinates; by taking the aforementioned static positions as the vertices of a polyhedron, we can specify the coordinates of the object in each step with the help of barycentric coordinates.

Essential role of the metal-ion in the IPM-assisted domain closure of 3-isopropylmalate dehydrogenase.

X-ray structures of 3-isopropylmalate dehydrogenase (IPMDH) do not provide sufficient information on the role of the metal-ion in the metal-IPM assisted domain closure. Here solution studies were carried out to test its importance. Small-angle X-ray scattering (SAXS) experiments with the Thermus thermophilus enzyme (complexes with single substrates) have revealed only a very marginal (0-5%) extent of domain closure in the absence of the metal-ion.

[Study of the origin of hyperglycemia in acute myocardial infarct].

In order to clarify the origin of hyperglycaemia, blood glucose, glycated haemoglobin (GHb) and protein-corrected serum fructosamine (SFA) values were simultaneously determined at admission of 65 patients with acute myocardial infarction while oral glucose tolerance test was performed later at discharge. In 29 patients no alterations in carbohydrate metabolism were found (blood glucose: 5.2 +/- 0.

Serum fructosamine (alkaline-reducing activity) for evaluation of glycemic control in diabetic patients.

The values of serum fructosamine were significantly higher in 75 diabetic patients than those of metabolically healthy controls. Significant correlation could be observed between the glycated hemoglobin and serum fructosamine values in diabetics. Furthermore, significant correlations were established between the serum fructosamine values and the mean blood glucose as well as the mean 24 hours urinary glucose values measured 10-14 days previously in diabetics.