Publications by authors named "Lukas Friederici"

The increasing demand for lightweight materials with exceptional stability and durability has resulted in a significant rise in fiber-reinforced plastic (FRP) production. These materials find applications in various fields. However, the exceptional properties and diverse compositional range of FRPs pose challenges to conventional recycling strategies.

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Pyrolysis is a promising way to convert plastic waste into valuable resources. However, for downstream upgrading processes, many undesirable species, such as conjugated diolefins or heteroatom-containing compounds, can be generated during this pyrolysis. In-depth chemical characterization is therefore required to improve conversion and valorization.

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Article Synopsis
  • Widespread smoke from wildfires and biomass burning, particularly spherical wood tar particles, harms air quality and poses health risks, but their toxicity and effects are not fully understood.
  • Researchers isolated two main fractions of wood tar—water-soluble and organic-soluble—and examined their effects on lung epithelial cells, revealing both fractions are toxic but act through different mechanisms.
  • The water-soluble fraction triggers oxidative stress and apoptosis, while the organic-soluble fraction causes DNA damage and alters the cell cycle, showing that both types of wood tar pose significant health risks.
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Despite broad application of different analytical techniques for studies on organic matter of chondrite meteorites, information about composition and structure of individual compounds is still very limited due to extreme molecular diversity of extraterrestrial organic matter. Here we present the first application of isotopic exchange assisted Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS) for analysis of alkali extractable fraction of insoluble organic matter (IOM) of the Murchison and Allende meteorites. This allowed us to determine the individual S-containing ions with different types of sulfur atoms in IOM.

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The rising demand for more and more specialized polyethylene represents a challenge for synthesis and analysis. The desired properties are dependent on the structure, but its elucidation is still intricate. For this purpose, we applied thermal analysis hyphenated to single photon ionization mass spectrometry (STA-SPI-MS).

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