Contactless conductivity detection for analytical techniques Developments from 2014 to 2016

The development of capacitively coupled contactless conductivity detection for the two-year period from mid-2014 to mid-2016 is covered in this review. This includes a survey of fundamental studies and further developments of the measuring technique reported as well as a discussion of new applications. These mostly concern capillary electrophoresis carried out in conventional capillaries as well as on microchip electrophoresis devices. The main focus is on the determination of small non-UV-absorbing organic ions and inorganic ions in different types of samples of clinical, nutritional or environmental interest. Outside of electrophoresis contactless conductivity detection is finding uses in detection in column chromatography, flow-injection analysis and industrial applications

Carbonylation of Csp3−H Bonds through Oxidative Wittig‐Type Reaction: An Unprecedented Version of Wittig Reaction

A Wittig‐type reaction was achieved by radical cation salt induced aerobic oxidation of Csp3−H bonds. Different from the “standard” version of the Wittig reaction, in which a carbon‐carbon double bond is formed from a carbonyl, carbonyl groups can be installed by similar process.Not from carbonyls but to carbonyls: A Wittig‐type reaction was achieved by radical cation salt induced aerobic oxidation of sp3 C−H bonds. Different from the “standard” version of the Wittig reaction, in which a carbon‐carbon double bond is formed from a carbonyl, carbonyl groups can be installed by similar process.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/137437/1/ajoc201600055-sup-0001-misc_information.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/137437/2/ajoc201600055.pd

Measurement Uncertainty Estimation in Amperometric Sensors: A Tutorial Review

This tutorial focuses on measurement uncertainty estimation in amperometric sensors (both for liquid and gas-phase measurements). The main uncertainty sources are reviewed and their contributions are discussed with relation to the principles of operation of the sensors, measurement conditions and properties of the measured samples. The discussion is illustrated by case studies based on the two major approaches for uncertainty evaluation–the ISO GUM modeling approach and the Nordtest approach. This tutorial is expected to be of interest to workers in different fields of science who use measurements with amperometric sensors and need to evaluate the uncertainty of the obtained results but are new to the concept of measurement uncertainty. The tutorial is also expected to be educative in order to make measurement results more accurate

Vývoj, optimalizace a validace analytické metody na stanovení těkavých mastných kyselin ve vodných vzorcích metodou GC/MS

This thesis is focused on the development of an analytical method for the determination of volatile fatty acids in aqueous samples using GC-MS/MS. The theoretical section provides general information on a selected group of acids, their significance in the biogas plants, the means of their derivatization and the analytical techniques used. The practical part mainly deals with optimizition of various parameters in the derivatization reaction to achieve optimal conditions. Finally, the analytical method was successfully validated and applied to the analysis of a real sample

New paths to recent music: Archives, documentation centres, and museums related to Czech popular music

The article presents a comprehensive view of documenting the history of popular music in the contemporary Czech Republic. After a historical introduction, outlining the broader historical context of the domestic situation and a brief context of the situation abroad, the author introduces new institutions, mostly non-profit organizations, which began to emerge after 1989 with the aim of collecting, archiving, and making available archival materials which tell the history of various areas of Czech and Czechoslovak popular music and culture. Through their activities, they have replaced, and continue to do it, the nonexistent interest in this area of culture on the part of the state, which persisted from the pre1989 period (that is before the fall of the communist regime in the former Czechoslovakia). Self-help activities are gradually finding their interdependence with, if not anchorage in, the state or academic environment. The archival and museum institutions established after 1989 focused on the previously neglected area of popular music and unofficial culture – such as Libri prohibiti, Popmuseum, Centre for the Study of Popular Culture, and Archive of Czech and Slovak Subcultures – cooperate with each other and with those previously established