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Removal of phenol from gas streams via combined plasma catalysis
Kuan Lun Pan,Dai Ling Chen,Guan Ting Pan,Siewhui Chong,Moo Been Chang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.52 No.-
A hybrid system consisting of non-thermal plasma and perovskite-like catalyst is developed andevaluated for the effectiveness in removing phenol from gas streams. For thermal catalysis,La0.8Sr0.2Mn0.8Cu0.2O3 shows high activity for phenol removal. Further, La0.8Sr0.2Mn0.8Cu0.2O3 is appliedfor combined plasma catalysis (CPC). The results indicate that phenol removal efficiency with CPCremains 100% at applied voltage range of 13–16 kV. Importantly, secondary pollutants (O3 and NOx) andenergy efficiency can be inhibited and increased, respectively, as CPC is applied. Overall, this studydemonstrates that combining non-thermal plasma with perovskite-like catalyst is effective in removingphenol from gas streams.
DEN1 deneddylates non-cullin proteins in vivo.
Chan, Yaru,Yoon, Jeongsook,Wu, June-Tai,Kim, Hyung-Jun,Pan, Kuan-Ting,Yim, Jeongbin,Chien, Cheng-Ting Cambridge University Press 2008 Journal of cell science Vol.121 No.19
<P>The ubiquitin-like protein Nedd8/Rub1 covalently modifies and activates cullin ubiquitin ligases. However, the repertoire of Nedd8-modified proteins and the regulation of protein neddylation status are not clear. The cysteine protease DEN1/NEDP1 specifically processes the Nedd8 precursor and has been suggested to deconjugate Nedd8 from cullin proteins. By characterizing the Drosophila DEN1 protein and DEN1 null (DEN1(null)) mutants, we provide in vitro and in vivo evidence that DEN1, in addition to processing Nedd8, deneddylates many cellular proteins. Although purified DEN1 protein efficiently deneddylates the Nedd8-conjugated cullin proteins Cul1 and Cul3, neddylated Cul1 and Cul3 protein levels are not enhanced in DEN1(null). Strikingly, many cellular proteins are highly neddylated in DEN1 mutants and are deneddylated by purified DEN1 protein. DEN1 deneddylation activity is distinct from that of the cullin-deneddylating CSN. Genetic analyses indicate that a balance between neddylation and deneddylation maintained by DEN1 is crucial for animal viability.</P>