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gcompris2 9
A:
The GCompris team was "dedicated" to do its best and ship the Windows and macOS versions as usual, in December they have succeeded:
The Windows and macOS version are updated and available for download on our website.
Google Play Version 8 is now available for you.
You may download the update using a new link provided in your email.
The GCompris team is also dedicated to do its best, and shipped a lot of fixes and improvements with the last version 8.3
…
At this time, we ask you to report bugs you encounter on the issue tracker available on our website.
Happy new year!
Improvements in the chromatographic separation of phenolic compounds in tea, via the co-operative effect of tris(2-chloroethyl)aminomethane as a cationic co-solvent and an additive in the aqueous mobile phase.
Chromatographic analysis of phenolic compounds in tea is useful for investigating the quality of tea, but the resolution between phenolic compounds is often unsatisfactory. In this study, the co-operative effect of tris(2-chloroethyl)aminomethane (TEAM) as a cationic co-solvent and an additive in the aqueous mobile phase was investigated using high-performance liquid chromatography with UV-vis detection. Phenolic compounds were separated on a C18 column with aqueous mobile phases containing 25 mM TEAM at different pH values. The phenolic compounds in real tea samples, which are categorized into catechins, gallic acid, epigallocatechin gallate, epicatechin, and quercetin, could be separated using the optimized mobile phase at pH 7.0. The analytical results showed that the co-operation effect of TEAM as a co-solvent and additive is effective in improving the chromatographic resolution of phenolic compounds. The pH of the aqueous mobile phase is critical for the co-operative effect, and pH 7.0 is the optimum condition. Our results suggest that the use of TEAM as a co-solvent and additive in aqueous mobile phases can be a promising and versatile approach for improving the chromatographic separation of phenolic compounds. ac619d1d87
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