Raman, NMR and EPR spectroscopy and electrophysiology methods were used to investigate the excitability and the packaging of myelin lipid layers and its viscosity during nerve exposure to pronase E. It was established that during exposure of nerve to pronase E the action potential (AP) conduction velocity and the Schwann cell (SC) (or myelin) water ordering increases, but the nerve myelin refra...

A k-bowtie is the graph consisting of two cycles of lenght k, having exactly one vertex in common. A k-bowtie system of order v is a pair (X,B), where X is a finite set of v vertices and B is a collection of edge disjoint k-bowties (called blocks) which partitions the edge set of the complete graph Kn, defined in X. In this paper we study 4-bowtie systems. We determine the spectrum of all types...

A sensitive, specific enzyme immunoassay (EIA) for trans-zeatin riboside (ZR) and trans-zeatin (Z) in the 0.3 to 30 picomole range has been described. The reliability of the method for measuring ZR + Z in partially purified extracts of Zea mays L. tissues was verified by highperformance liquid chromatography. EIA measurements showed that there was a concentration gradient of ZR + Z along the le...

Application of [(14)C]fructosyl sucrose was used to determine whether sucrose cleavage was necessary for sucrose uptake by sugarcane (Saccharum spp.) internode tissue. Although approximately 25% of (14)C in the apoplast was present as fructose, indicating some sucrose cleavage, less than 15% of the label was randomized in the sucrose that remained in the tissue after a 30 minute osmoticum rinse...

Fast rendering and botanically faithful description of plants are a real challenge in computer graphics. Usually, plant production is computed using the method internode by internode, while there exist a lot of buds in an individual tree, therefore, this approach is quite time-consuming even for a medium-size tree. In this paper, we present a new algorithm based on substructure instances to qui...