An Alternative Demonstration of Chemical Waves: A Video Clip of a One-Dimensional Wave in the Iodate–Arsenite System

A chemical wave was initiated in a system (glass tube or graduated cylinder) containing a water solution of potassium iodate, potassium hydrogen sulfate, starch, and an excess of potassium arsenite. A large number of photos (329) were taken with a digital camera (one snapshot every 30 seconds). These photos were linked to give a unique video clip. This video clip may be used as a time-saving alternative to the classical demonstration. Similar clips may be made for other long-lasting processes.     

The Plateau problem from the perspective of optimal transport

Both optimal transport and minimal surfaces have received much attention in recent years. We show that the methodology introduced by Kantorovich on the Monge problem can, surprisingly, be adapted to questions involving least area, e.g., Plateau-type problems as investigated by Federer.     

Convex and alpha-prestarlike subordination chains

In this paper we consider convex subordination chains (c.s.c.) and alpha-prestarlike subordination chains (α-p.s.c.) over (0,1] on the unit disc in the complex plane. We obtain sufficient conditions for a mapping f(z,t) to be an α-p.s.c. over (0,1], which generalize a well-known result of Ruscheweyh [St. Ruscheweyh, Convolutions in Geometric Function Theory, Les Presses de l'Université de Montreal, 1982]. We also obtain sufficient conditions for injectivity for nonanalytic mappings on the unit disc, and give certain examples of α-c.s.c. over (0,1] on the unit disc.     

Approximation by fuzzy B-spline series

We study properties concerning approximation of fuzzy-number-valued functions by fuzzy B-spline series. Error bounds in approximation by fuzzy B-spine series are obtained in terms of the modulus of continuity. Particularly simple error bounds are obtained for fuzzy splines of Schoenberg type. We compare fuzzy B-spline series with existing fuzzy concepts of splines.     

In vivo dosimetry with the use of silicon photodiodes

Miniature silicon photodiodes have been tested for utilization in radiotherapy. Their use in the treatment of ca laryngis is described. The actually given dose was monitored during irradiation. Treatment plan or the setting up of the entrance fields was modified according to the response of the diode. This method seems to be a useful tool for checking both the treatment plan and appropriate setting up of the patient in treatment position.     

Comparative instrumental investigations of some bile acids

Journal of Thermal Analysis and Calorimetry - In this work, solifenacin succinate (SOLS), flavoxate HCl (FLXHC) and tolterodine tartrate (TOLT) drugs were investigated using thermal analysis (TA)...     

Colorimetrische Bestimmung von Chinin, Cinchonin, Brucin und Strychnin

Zusammenfassung In der vorliegenden Arbeit wird eine colorimetrische Methode zur Bestimmung von Brucin, Strychnin, Chinin und Cinchonin beschrieben, die darauf beruht, daß mit Kaliumhexathiocyanatochromat(III), [Cr(SCN)₆]K₃, komplexe Verbindungen entstehen, die in Wasser unlöslich, in Aceton hingegen mit violetter Färbung leicht löslich sind. Die acetonischen Lösungen können mit einem Pulfrich-Spektrophotometer mit Gelbfilter colorimetriert werden. Das Maximum der Absorption liegt bei 574 nm. Die Extinktion zeigt keine Veränderungen mit der Zeit. Für die Extinktionskonstanten sind folgende Werte ermittelt worden: Chinin 220, Brucin 191, Cinchonin 189 und Strychnin 135.