0323.mp4

Movie of the evolvement of power evolution process as the light propagates through the MZI with the wavelength scanning from 1100-1700 nm

Dielectric Analysis for the Spherical and Rodlike Micelle Aggregates Formed from a Gemini Surfactant: Driving Forces of Micellization and Stability of Micelles

The self-aggregation behavior of Gemini surfactant 12-2-12 (ethanediyl-1,2-bis­(dimethyldodecylammonium bromide)) in water was investigated by dielectric relaxation spectroscopy (DRS) over a frequency range from 40 Hz to 110 MHz. Dielectric determination shows that well-defined spherical micelles formed when the concentration of the surfactant was above a critical micelle concentration CMC₁ of 3 mM and rodlike micelles formed above CMC₂, 16 mM. The formation mechanism of the spherical micelles and their transition mechanism to clubbed micelles were proposed by calculating the degree of counterion binding of the micelles. The interactions between the head groups and the hydrophobic chains of the surfactant led to the formation of the micelles, whereas the transition is mainly attributed to the interaction among the hydrophobic chains. By analyzing the dielectric relaxation observed at about 10⁷ Hz based on the interface polarization theory, the permittivity and conductivity of micelle aggregates (spherical and clubbed) and volume fraction of micelles were calculated theoretically as well as the electrical properties of the solution medium. Furthermore, we also calculated the electrokinetic parameters of the micelle particle surface, surface conductivity, surface charge density, and zeta potential, using the relaxation parameters and phase parameters. On the basis of these results, the balance of forces controlling morphological transitions, interfacial electrokinetic properties, and the stability of the micelle aggregates was discussed

Phenolic profiles and antioxidant capacities of crude extracts and subsequent fractions from <i>Potentilla fruticosa</i> L. leaves

<p>This work aimed to further investigate the phenolic profiles and antioxidant capacities of the crude extracts and the subsequent fractions of <i>Potentilla fruticosa</i> leaves. Result showed that <i>P. fruticosa</i> leaves contained high amounts for hyperoside, ellagic acid and (+)-catechin contents, and the highest amount being registered for hyperoside (17.67 mg g⁻¹). Nine sub-fractions were obtained after column chromatographic separation. EF-3, EF-4, EF-5 and BF-2 presented higher values for their total phenolic or flavonoid, (+)-catechin, ellagic acid and hyperoside content. Besides, EF-3, EF-4, BF-2 and BF-3 showed significant <i>in vitro</i> antioxidant capacities and protective effects on <i>Escherichia coli</i> under peroxide stress. The correlation between chromatograms and antioxidant activity showed that (+)-catechin, ellagic acid and hyperoside may play crucial roles in the antioxidant capacities of <i>P. fruticosa</i> and could be used as chemical markers for its quality assessment. Moreover, this is the first time <i>P. fruticosa</i> leaves have been systematically studied.</p

Cell cycle analysis of Pumc-91/ADM cells treated with TMP using flow cytometry.

<p>Cells were cultured with different concentrations of TMP (a. 0 mM, b.2 mM, c.4 mM) for 48 h. G1, S and G2 indicated cell cycle phases.</p

Cell cycle analysis of T24/DDP cells treated with TMP using flow cytometry.

<p>Cells were cultured with different concentrations of TMP (a. 0 mM, b.2 mM, c.4 mM) for 48 h. G1, S and G2 indicated cell cycle phases.</p

All Chemical Vapor Deposition Growth of MoS₂:h-BN Vertical van der Waals Heterostructures

Vertical van der Waals heterostructures are formed when different 2D crystals are stacked on top of each other. Improved optical properties arise in semiconducting transition metal dichalcogenide (TMD) 2D materials, such as MoS₂, when they are stacked onto the insulating 2D hexagonal boron nitride (h-BN). Most work to date has required mechanical exfoliation of at least one of the TMDs or h-BN materials to form these semiconductor:insulator structures. Here, we report a direct all-CVD process for the fabrication of high-quality monolayer MoS₂:h-BN vertical heterostructured films with isolated MoS₂ domains distributed across 1 cm. This is enabled by the use of few-layer h-BN films that are more robust against decomposition than monolayer h-BN during the MoS₂ growth process. The MoS₂ domains exhibit different growth dynamics on the h-BN surfaces compared to bare SiO₂, confirming that there is strong interaction between the MoS₂ and underlying h-BN. Raman and photoluminescence spectroscopies of CVD-grown MoS₂ are compared to transferred MoS₂ on both types of substrates, and our results show directly grown MoS₂ on h-BN films have smaller lattice strain, lower doping level, cleaner and sharper interfaces, and high-quality interlayer contact

Effect of TMP on DDP cytotoxicity in T24/DDP cells.

<p>Effect of TMP on DDP cytotoxicity in T24/DDP cells.</p

The expression of MRP1, LRP, GST, BCL-2 and TOPO-II at the protein levels examined by immunofluorescence assay in T24/DDP cells.

<p>Cells were treated with different concentrations of TMP (0, 2, 4 mM) for 48 h. The group in the absence of TMP was considered as the control group (magnification, ×400).</p

The expression of MRP1, GST, BCL-2, LRP and TOPO-II at the protein levels examined by western blot in Pumc-91/ADM and T24/DDP cells.

<p>a. electrophoregram. 1——Pumc-91/ADM TMP0, 2——Pumc-91/ADM TMP4, 3——T24/DDP TMP0, 4——T24/DDP TMP4. b, c. bar graph. *p<0.01 compared with the control group.</p

Effect of EGCG, Rh2 and TMP on ADM cytotoxicity in Pumc-91/ADM cells.

<p>Effect of EGCG, Rh2 and TMP on ADM cytotoxicity in Pumc-91/ADM cells.</p