Yildirimmygind4881

A novel P2/tunnel/O3' composite Na0.7Bi0.01MnO2 cathode is developed via the Na+-site modification of Bi3+ in layer structure Na0.7MnO2 for the first time. Superior electrochemical performance with a high capacity retention of ∼86.5% after 300 cycles at 2C is obtained. Moreover, the tri-phase structure can also serve as a model material, which intuitively evidences the environmental structural stability order tunnel > P2 > O3'.Correction for 'Patterned liquid metal contacts for high density, stick-and-peel 2D material device arrays' by Yen-Lin Chen et al., Nanoscale, 2018, 10, 14510-14515.Previous studies have shown that curcumin, a bioactive dietary compound with a thiol-reactive α,β-unsaturated carbonyl moiety, can covalently modify protein thiols. However, most of the previous studies were performed in cultured cells or cell-free enzyme systems, and so it remains unknown whether curcumin could covalently modify proteins after oral administration in vivo. Using click chemistry-based fluorescence imaging, here we show that oral administration of dialkyne-curcumin (Di-Cur), a "click" probe mimicking curcumin, results in covalent modifications of cellular proteins in colon and liver tissues, but not in other tissues, in mice. This result suggests that oral administration of curcumin leads to the formation of the curcumin-protein complex in a tissue-specific manner, which could contribute to the biological effects and/or pharmacokinetics of curcumin. Further studies to elucidate the identities of curcumin-binding proteins could greatly help us to better understand the molecular mechanisms of curcumin, and develop novel strategies for disease prevention.In spite of the tremendous success of dynamic kinetic resolutions for a broad range of compound classes, tertiary alcohols and their corresponding esters have still remained as one of the most challenging substrates for this type of process. This is due to the size and steric hindrance of tertiary alcohols as well as to the difficulty in finding reaction conditions for the racemization of such compounds being at the same time compatible with the resolution reaction, which preferably is carried out with an enzyme. In this study, the first example of a dynamic kinetic resolution of a racemic tertiary alcohol is presented. The desired synthesis of the resulting enantiomerically pure ester was achieved by combining a lipase-catalyzed kinetic resolution with an in situ racemization utilizing a bio-compatible oxovanadium-catalyst. First, the two individual reactions were examined, improved and adjusted to be compatible with each other. Subsequently, addition of both catalysts in tailor-made portions led to the desired combined process and delivered the product with >99% ee and a conversion exceeding 50%, thus proving such a desired dynamic kinetic resolution of a tertiary alcohol.This communication uses electrochemical quartz crystal microbalance (EQCM) in combination with the potentiostatic method to study the in situ exchange mechanism for dye molecules and cations on the nano-film surface under a constant potential. The relationship between dye molecule desorption mass and charge was analyzed. A theoretical model was established to obtain the important parameters of cation exchange number and apparent valence electron number during dye desorption, and the microscopic desorption mechanism of the dye is further revealed.In this work, experimental conditions were established to fabricate self-ordered rutile-TiO2 nanotube arrays, coated with a conformal anatase-TiO2 thin layer using atomic layer deposition. E. coli inactivation tests showed a considerable increase in photocatalytic activity using rutile-TiO2 nanotubes coated with anatase-TiO2 compared to that using single rutile or anatase TiO2 nanotubes only. Photocatalytic hydroxyl radical generation rates (determined by pNDA bleaching) were also meaningfully enhanced for the combined anatase/rutile TiO2 nanostructures. Therefore, we show that it is possible to take advantage of the morphological properties of the materials and the synergic effect from the combination of both TiO2 polymorphs during the design of novel materials, which could be used as antibacterial agents to improve the quality of drinking water.Hydraulically fractured wells with horizontal drilling (HDHF) accounted for 69% of all oil and gas wells drilled and 670 000 of the 977 000 producing wells in 2016. see more However, only 238 flowback and produced water samples have been analyzed to date for specific organic chemicals. To aid the development of predictive tools, we constructed a database combining additive disclosure reports and physicochemical conditions at respective well sites with the goal of making synthesized analyses accessible. As proof-of-concept, we used this database to evaluate transformation pathways through two case studies (1) a filter-based approach for flagging high-likelihood halogenation sites according to experimental criteria (e.g., for a model compound, cinnamaldehyde) and (2) a semi-quantitative, regionally comparative trihalomethane formation model that leverages an empirically derived equation. Study (1) highlighted 173 wells with high cinnamaldehyde halogenation likelihood based on combined criteria related to subsurface conditions and oxidant additive usage. Study (2) found that trihalomethane formation in certain wells within five specific basins may exceed regulatory limits for drinking water based on reaction-favorable subsurface conditions, albeit with wide uncertainty. While experimentation improves our understanding of subsurface reaction pathways, this database has immediate applications for informing environmental monitors and engineers about potential transformation products in residual fluids, guiding well operators' decisions to avoid unwanted transformations. In the future, we envision more robust components incorporating transformation, transport, toxicity, and other physicochemical parameters to predict subsurface interactions and flowback composition.Here, we demonstrated a unique symmetric supercapacitor (SSC) device architecture based on reduced graphene oxide (RGO) and nitrogen-doped RGO (N-RGO) electrodes. The RGO/N-RGO SSC shows a wide voltage window (2.2 V), high energy density (106.3 W h kg-1), and ultra-high power density (15184.8 W kg-1). The RGO/N-RGO SSC also delivers outstanding stability of 95.5% over 10 000 galvanostatic charging-discharging tests and 90.5% over 8 h of voltage holding tests. Additionally, this work explores a better understanding of leakage current and self-discharge mechanisms, which justifies the excellent state of health of the RGO/N-RGO SSC device.