Block Key (tomatobowl77)

Extracellular polymeric substances (EPS) are known to crucially affect the properties and performance of activated sludge, but the detailed influential mechanisms and the pertinence to specific compositional, structural properties of EPS are still elusive. Such knowledge gaps have severely limited our ability in optimizing biological wastewater treatment processes, for which long-term robust and efficient sludge performance remains one of the main bottlenecks. Here, we overview the new knowledge on the molecular structure of sludge EPS gained over the past few years and discuss the future challenges and opportunities for further advancing EPS study and engineering. The structural and functional features of several macromolecules in sludge EPS and their important structural roles in granular sludge are analyzed in detail. Firmonertinib concentration The EPS-pollutant interactions and environment-dependent regulation machinery on EPS production are deciphered. Lastly, the remaining knowledge gaps are identified, and the future research needs that may lead to molecular-level understanding and precise engineering of sludge EPS are highlighted.Colon cancer is one of the most common cancers with high mortality in humans. Early diagnosis and treatment of colon cancer is of great significance for cancer therapy. Numerous theranostic agents have been developed to detect and kill cancer cells. However, few reports have focused on how these agents control and affect the gene expression of cancer cells in vivo. Herein, three pyridinium-functionalized tetraphenylethylene derivatives, namely, TPE-OM, TPE-H, and TPE-NO2, with electron-donating and electron-withdrawing groups were facilely synthesized as theranostic agents for cell imaging and anticolon cancer therapy. Among these AIE luminogens (AIEgens), TPE-OM with donor and acceptor structure showed the best treatment efficacy for colon cancer through systematic biological evaluation and comparison. Both in vitro cell imaging and in vivo tumor treatment experiments demonstrated that TPE-OM can be utilized as an efficient theranostic agent to diagnose and kill colon cancer cells. Flow cytometric analysis revealed that the cell cycle process was disturbed by TPE-OM in colon cancer cells. Deep insight into the gene level revealed that the expressions of cell-cycle-promoting genes was inhibited upon addition of TPE-OM. This study may open a new venue for unraveling the mechanisms of cancer metastasis.Camouflage is critical for many living organisms to survive in the natural world and has stimulated applications, such as optical cloaking and military affairs. However, most applications adopt crypsis-type camouflage that prevents the organisms from being detected by matching the environment, which is challenging to realize the large angle-of-view and broadband operation at optical frequencies. Here, as inspired by nature's system of masquerade, we demonstrate an optical masquerade, being detected but not recognized, with perturbative metasurfaces that could camouflage an object into another unrelated one under the oblique (±69°) illumination of visible light with an ∼160 nm bandwidth. Predicted by the perturbation theory, the dielectric metastructures encircling a pistol-shaped object have a thin layer of nanodisk array, which can suppress the electromagnetic resonances of nanomodes for mimicking the transmitted intensity and phase of the camouflaged object. We also exhibit that optical masquerade is an invasive, environment-independent, object-unlimited, and material-extendable camouflage, which might benefit optical security, anticounterfeiting, and encoding.Throughout the past decade, zwitterionic moieties have gained attention as constituents of biocompatible materials for exhibiting superhydrophilic properties that prevent nonspecific protein adsorption. Researchers have been working to synthesize zwitterionic materials for diverse biomedical applications such as drug delivery, protein