TiO2/Ag3PO4 heterostructures improved the separation efficiency of electron–hole pairs and enhanced the photocatalytic disinfection efficiency for F. graminearum macroconidia.
Bacterial
cells can be inactivated by external reactive oxygen
species (ROS) produced by semiconductor photocatalysis. However, little
is known about cellular responses to photocatalysis. For a better
understanding of this issue, one strain of Escherichia coli (E. coli, hereafter named as MT), which has an
increased ability to metabolize carbon sources, was screened out from
the wild-type (WT) E. coli K12 by repeated exposure
to photocatalysis with palladium oxide modified nitrogen-doped titanium
dioxide. In this study, transcriptome sequencing of the WT and MT
strains that were exposed or unexposed to photocatalysis were carried
out. Cellular responses to photocatalysis were inferred from the functions
of genes whose transcripts were either increased or decreased. Upregulation
of expression of bacterial flagellar assembly genes used for chemotaxis
was detected in cells exposed to semilethal photocatalytic conditions
of the WT E. coli. Increased capability to degrade
superoxide radicals and decreased bacterial flagellar assembly and
chemotaxis were observed in MT E. coli compared to
WT cells. We conclude that the differences in motility and intracellular
ROS between MT and WT are directly related to survivability of E. coli during exposure to photodisinfection.
Oral processing behaviour of food is affected by the structural characteristics of the food matrix, including rheological and mechanical attributes as well as size and shape. Pasta, a staple starchy...
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