Chengjie Li

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This paper studies the effects of the covering layers on the performance of a cross-like Hall plate. Three different structures of a cross-like Hall plate in various sizes are designed and analyzed. The Hall plate sensitivity and offset are characterized using a self-built measurement system. The effect of the P-type region over the active area on the(More)
The fall colors are signs of chlorophyll breakdown, the biological process in plants that generates phyllobilins. Most of the abundant natural phyllobilins are colorless, but yellow phyllobilins (phylloxanthobilins) also occur in fall leaves. As shown here, phylloxanthobilins are unique four-stage photoswitches. Which switching mode is turned on is(More)
Synthesis, spectroscopic and crystallographic analysis of the Zn-complex of a di(b,b 0-sulfoleno)pyrrin: model for Zn-complexes of bilirubin and of phylloxanthobilins Abstract A high yield preparation, spectroscopic and crystallographic investigation of the crystalline Zn-complex of a di(b,b 0-sulfoleno)pyrrin are reported here. In the brightly green(More)
This work studies the effects of an aluminum covering on the performance of cross-like Hall devices. Four different Hall sensor structures of various sizes were designed and fabricated. The sensitivity and offset of the Hall sensors, two key points impacting their performance, were characterized using a self-built measurement system. The work analyzes the(More)
The aim is to study the effects and underlying mechanisms of astragalus polysaccharide (APS) on the peroxide-induced injury in C2C12 myoblasts in vitro. Cell viability in the presence or absence of APS was detected by the methyl thiazolyl tetrazolium colorimetric assay. The autophagosomes were observed by electron microscopy to examine the influence of APS(More)
Invited for the cover of this issue is the group of Bernhard Kräutler at the University of Innsbruck, Austria. The image depicts the autumnal "disappearance" of chlorophyll and the ensuing rapid formation of colorless phyllobilins. Read the full text of the article at 10.1002/chem.201404783.
Natural cyclic tetrapyrroles feature outstanding capacity for binding transition metal ions, furnishing Nature with the important metallo-porphyrinoid 'Pigments of Life', such as heme, chlorophyll (Chl) and vitamin B12. In contrast, linear tetrapyrroles are not generally ascribed a biologically relevant ability for metal-binding. Indeed, when heme or Chl(More)