Characterising the change rule of freshness and inorganic anions in reconstituted tobacco pulp with oscillation time

Abstract In order to study the change rule of freshness and acid ions in reconstituted tobacco slurry, the content changes of 17 organic acids and 5 inorganic anions in reconstituted LED Candle tobacco slurry with different residence times under confined condition were determined by on-line solid-phase extraction ion chromatography in this study.Th

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A direct integral pseudospectral method for solving a class of infinite-horizon optimal control problems using Gegenbauer polynomials and certain parametric maps

We present a novel direct integral pseudospectral (PS) method (a direct IPS method) for solving a class of continuous-time infinite-horizon optimal control problems (IHOCs).The method transforms the IHOCs into finite-horizon optimal control problems in their integral forms by means of certain parametric mappings, which are then approximated by fini

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Baltic Sea shipwrecks as a source of hazardous pollution

Background Shipwrecks on the Baltic Sea seabed pose a serious threat to the marine environment.Fuel, ammunition and chemicals in their holds can enter the ecosystem at any time, causing an ecological disaster.It is known that oil spills from ship accidents can affect life and health of different species of animals, both immediately after catastroph

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Transcriptional repression by a secondary DNA binding surface of DNA topoisomerase I safeguards against hypertranscription

Abstract Training Equipment Regulation of global transcription output is important for normal development and disease, but little is known about the mechanisms involved.DNA topoisomerase I (TOP1) is an enzyme well-known for its role in relieving DNA supercoils for enabling transcription.Here, we report a non-enzymatic function of TOP1 that downregu

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