The photo-curing behavior of composites containing nanosized SiO2 in an acrylated hyperbranched polymer matrix was investigated by means of photo differential scanning calorimetry. The chemical conversion data were analyzed using an autocatalytic model, paying close attention to the influence of composition and UV intensity. It was shown that the reaction order and the autocatalytic exponent we...

A problem of self-referential paradox and self-reproduction is discussed in a network model of machines and tapes. A tape consists of a bit string, encoding function of a machine. Tapes are replicated when it is attached by an adequate machine. Generally, a tape is replicated but it may be di erent from the original one. In this paper, external noise evolves diversity in a system. New reaction ...

The Ntn (N terminal nucleophile) hydrolases are a new family of hydrolytic enzymes with a characteristic fold in their catalytic domain. These enzymes act on a range of substrates, cleaving amide or ester bonds by a nucleophilic reaction. The catalytic nucleophile is the oxygen in serine or threonine side chains, or sulphur in the cysteine side chain. The active site is often created by autocat...

1. Blood-clotting mechanism has been analyzed by a procedure which devotes a separate experimental step to each of the three primary reactions: 1. Prothrombokinase --> thrombokinase 2. Prothrombin --> thrombin 3. Fibrinogen --> fibrin 2. Activation of prothrombin by thrombokinase followed the course of a unimolecular reaction, and the concentration of thrombokinase determined the initial rate. ...

A particular class of ordinary diierential equations (ODE) describing catalyzed, template-induced, and erroneous replication is investigated. The ODEs can be split into a replicator part accounting for the correct replication and a mutation term accounting for all miscopying processes. The set of all species is divided into the catalytically active \viable" species and an error-tail subsuming a...

The stable yellow nanosilver (AgNP) and blue nanosilver (AgNPB) sols were prepared by the NaBH4 procedure. The new nanocatalytic reaction of AgNP-NaCl-H2O2 was investigated by surface plasmon resonance (SPR) absorption, resonance Rayleigh scattering (RRS), surface-enhanced Raman scattering (SERS) and scanning electron microscope (SEM) techniques. The autocatalytic oxidization of Ag on AgNP surf...

Robert Luther’s student, Herr cand. Meinecke, moved a wire loop along the test tube to mark the position of the propagating front, with the image projected onto a screen so the entire audience could see. It was May 21, 1906, at the Main Meeting of the Deutsche Bunsengesellschaft für Angewandte Physikalische Chemie held in Dresden, Germany. Luther, who was Director of the Physical Chemistry Labo...

Modeling complex chemical reaction networks has inspired a considerable body of research and variety approaches to modeling nonlinear pathways are being developed. Here, general methodology is formulated convert an arbitrary network into its equivalent electrical analog. The topological equivalence the analog mathematically established for unimolecular reactions using Kirchhoff's laws. modular ...