a flow injection method is reported for the determination of ascorbic acid based on amperometric detection, using a cobalt(ii) phthalocyanine (copc) modified graphite-epoxy electrode. the amperometric respons was evaluated with regard to ph, ionic strength of the electrolyte, flow rate of the carrier solution, injected sample volume and conditioning time of the electrode. the limit of detection...

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We recently noticed an error in the Methods section of this paper. Voxel size in Talairach space was reported as 3×3×3 mm. It was actually 3.3×3.3×3.3 mm. Due to this error, and to a systematic error in calculating metric volume, activation volumes were reported incorrectly throughout the paper. These errors have no impact, however, on the arguments presented. In the Results section, and in Tab...

Volume A of International Tables for Crystallography approaches its 100th birthday. In fact, although it first appeared under this title only in 1935, its predecessor is the book by Wyckoff (1922), which already contained lists of general and special equivalent positions (later to be called Wyckoff positions) and, in its second edition (Wyckoff, 1930), also three-dimensional drawings of the sym...

Tables 1 and 2 below include performance data of the new ray shooting algorithm (RSA) called the DE-tree. The data is from rendering the standard procedural database (SPD) scenes. This data structure is in part of interest because it achieves efficiency in the four major performance metrics of robustness, search speed, memory usage, and RSA build time. Simultaneously achiving these goals is hig...

The book entitled “Deans and Rectors of the «Grigore T. Popa» University of Medicine and Pharmacy in Jassy (1879-2016)” represents a new remarkable achievement in the series of books elaborated by the well-known medical historian Prof. Dr. Dana Baran and dedicated to the study of the history of the medical and pharmaceutical learning from Jassy. The volume starts with a very necessary introduct...

A computer program in Visual Basic 6.0 is written to calculate steam tables for pure water up to 800oC and 1400 bar. The steam tables are created as a DLL (Dynamic Link Library) object with properties: temperature, pressure, specific volume, enthalpy and entropy for liquid and vapor phases, and liquidvapor state. The steam tables can be incorporated in any computer program on the Windows platfo...