154 research outputs found

    The grand average ERPs for the negative-low self-relevant processing (blue line), the negative-high self-relevant processing (red line), the positive-low self-relevant processing (grey line), and the positive-high self-relevant processing (yellow line) in the low self-esteem group and in the high self-esteem group.

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    <p>The topographic maps of the frontal N1 component in the positive-low self-relevant condition and the frontal P2 component in the negative-low self-relevant condition at electrode of Fz are also shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0081169#pone-0081169-g001" target="_blank">Figure 1</a>.</p

    Efficient Visible-Light-Driven Photocatalytic Degradation with Bi<sub>2</sub>O<sub>3</sub> Coupling Silica Doped TiO<sub>2</sub>

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    A new TiO<sub>2</sub>-based visible light photocatalyst (Bi<sub>2</sub>O<sub>3</sub>/Si–TiO<sub>2</sub>) was synthesized by both Bi<sub>2</sub>O<sub>3</sub> coupling and Si doping via a two-step method. The structural, morphological, light absorption, and photocatalytic properties of as-prepared samples were studied using various spectroscopic and analytical techniques. The results showed that Bi<sub>2</sub>O<sub>3</sub>/Si–TiO<sub>2</sub> catalysts held an anatase phase and possessed high thermal stability. The doped Si was woven into the lattice of TiO<sub>2</sub>, and its content had a significant effect on the surface area and the crystal size of Bi<sub>2</sub>O<sub>3</sub>/Si–TiO<sub>2</sub>. The introduced Bi species mainly existed as oxides on the surface of TiO<sub>2</sub> particles, and the Bi<sub>2</sub>O<sub>3</sub> photosensitization extended the light absorption into the visible region. Bi<sub>2</sub>O<sub>3</sub> coupling also favored the separation and transfer of photoinduced charge carriers to inhibit their recombination and Si doping enlarged the surface area of photocatalysts. Compared to bare TiO<sub>2</sub>, Bi<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub>, and Si–TiO<sub>2</sub>, Bi<sub>2</sub>O<sub>3</sub>/Si–TiO<sub>2</sub> samples showed better activities for the degradation of methyl orange (MO) and bisphenol A (BPA) under visible light irradiation (λ > 420 nm). The highest activity was observed for 1.0% Bi<sub>2</sub>O<sub>3</sub>/15% Si–TiO<sub>2</sub> calcined at 500 °C. The superior performance was ascribed to the high surface area, the ability to absorb visible light, and the efficient charge separation associated with the synergetic effects of appropriate amounts of Si and Bi in the prepared samples. The adsorbed hydroxyl radicals (<sup>•</sup>OH) were also found to be the most reactive species in the photocatalytic degradation

    (<i>n</i>,<i>m</i>) Assignments of Metallic Single-Walled Carbon Nanotubes by Raman Spectroscopy: The Importance of Electronic Raman Scattering

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    In this work, we report an accurate and convenient method that can be used to assign the chirality of all metallic single-walled carbon nanotubes (M-SWNTs). This method is designed based on the electronic Raman scattering (ERS) features, which are resonantly enhanced at the corresponding excitonic transition energies (<i>M</i><sub><i>ii</i></sub><sup>+</sup> and <i>M</i><sub><i>ii</i></sub><sup>–</sup>). Using this method, we are able to accurately determine the electronic property <i>M</i><sub><i>ii</i></sub> with the resolution of a vibrational Raman spectroscopy (∼0.3 meV), which is significantly higher than that of the electronic spectroscopies (∼3 meV). We use the <i>M</i><sub><i>ii</i></sub> splitting value, which is found insensitive to environmental changes, as a universal criteria for (<i>n</i>,<i>m</i>) assignments in various environments. As an illustrative example, simply using a commercialized Raman spectrometer with two laser lines (1.959 and 2.330 eV), we are able to unambiguously assign 18 metallic chiralities with <i>M</i><sub>11</sub> in the 1.6–2.3 eV range in our samples. This method provides an accurate database of <i>M</i><sub><i>ii</i></sub>’s in a similar way as photoluminescence excitation spectroscopy does for S<sub><i>ii</i></sub>’s. It can facilitate further systematic studies on the properties of M-SWNTs with defined chirality

    Participants’ self-relevance scores and reaction times for positive traits and negative traits (32 samples, means and standard deviations).

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    <p>Participants’ self-relevance scores and reaction times for positive traits and negative traits (32 samples, means and standard deviations).</p

    Dispersing Carbon-Based Nanomaterials in Aqueous Phase by Graphene Oxides

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    Graphene oxides (GO) can be considered as polyelectrolytes with surfactant-like characteristics. On one hand, due to the electrical repulsion between the negatively charged ionized edges, GO exhibits great water solubility; on the other hand, its hydrophobic central plane retains the potential of strong π–π interaction with other conjugated sp<sup>2</sup> network structures. Therefore, it is expected that GO can serve as an excellent dispersing agent for dispersion of various carbon-based nanomaterials in aqueous phase. Here we report a systematic study of dispersing various carbon-based nanomaterials, including SWNTs, C<sub>60</sub>, and graphene, by aqueous GO. The GO-dispersed all-carbon nanocomposites are characterized using various spectroscopic methods and electron microscopies, and their stabilities are tested. Compared to other dispersing agents, the GO concentration is much lower than the concentrations of other dispersing agents used when similar contents of carbon-based nanomaterials are dispersed. Involving only simple ultrasonication and centrifugation processes, GO dispersion thus offers an easy manipulation for large-scale solution-dispersed all-carbon nanocomposites

    Safety Assessment of the Biogenic Amines in Fermented Soya Beans and Fermented Bean Curd

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    To evaluate the safety of biogenic amines, high performance liquid chromatography (HPLC) was used to evaluate the levels of biogenic amines in fermented soya beans and fermented bean curd. In fermented soya beans, the total biogenic amines content was in a relatively safe range in many samples, although the concentration of histamine, tyramine, and β-phenethylamine was high enough in some samples to cause a possible safety threat, and 8 of the 30 samples were deemed unsafe. In fermented bean curd, the total biogenic amines content was more than 900 mg/kg in 19 white sufu amples, a level that has been determined to pose a safety hazard; putrescine was the only one detected in all samples and also had the highest concentration, which made samples a safety hazard; the content of tryptamine, β-phenethylamine, tyramine, and histamine had reached the level of threat to human health in some white and green sufu samples, and that may imply another potential safety risk; and 25 of the 33 samples were unsafe. In conclusion, the content of biogenic amines in all fermented soya bean products should be studied and appropriate limits determined to ensure the safety of eating these foods

    Image_2_Addition of PD-1/PD-L1 inhibitors to chemotherapy for triple-negative breast cancer: a meta-analysis.tif

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    BackgroundIn recent years, the addition of immune checkpoint inhibitors (ICI) to chemotherapy (CT) has become a research hotspot in the therapy of metastatic triple-negative breast cancer. Nevertheless, controversial results have been revealed among the published randomized controlled trials. Hence, a meta-analysis was performed to assess the therapeutic effect of this treatment regimen.MethodsFive English databases (PubMed, WOS, CENTRAL, Scopus, and Embase), and four Chinese databases (CBM, CNKI, VIP, and Wanfang), as well as oncological meetings, were systematically searched to identify eligible studies that assessed the addition of ICI to CT versus CT alone in metastatic triple-negative breast cancer. The pooled hazard ratios (HR) of progression-free survival (PFS) and overall survival (OS) were estimated using fixed- or random-effect model. Subgroup analyses were also performed in the intention-to-treat (ITT) and PD-L1-positive individuals.ResultsAll told there are five eligible randomized controlled trials involving 3,000 patients were enrolled in this meta-analysis. Compared with CT alone, the ICI plus CT regimen significantly increased PFS in the ITT (HR = 0.80, 95% CI: 0.73–0.88) and PD-L1-positive (HR = 0.70, 95% CI: 0.62–0.79) populations, as well as OS in the ITT (HR = 0.89, 95% CI: 0.81–0.97) and PD-L1-positive populations (HR = 0.80, 95% CI: 0.71–0.91). Moreover, the PFS of sufferers treated with the combination strategy of ICI with CT increased alongside PD-L1 enrichment. A clinical benefit in terms of objective response rate was also distinctly observed in both populations treated with ICI plus CT. In the subgroup analysis, patients in the no prior CT subgroup experienced a striking increase in PFS in both populations; however, a difference was not observed in other subgroups.ConclusionsThe combination strategy striking improves PFS and OS in both ITT and PD-L1-positive populations, and PFS is prolonged with PD-L1 enrichment. Patients who do not receive CT prior to this treatment are associated with longer PFS in both populations.Systematic review registrationhttps://www.crd.york.ac.uk/PROSPERO/#recordDetails, identifier CRD42021289817.</p

    DataSheet_1_Addition of PD-1/PD-L1 inhibitors to chemotherapy for triple-negative breast cancer: a meta-analysis.pdf

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    BackgroundIn recent years, the addition of immune checkpoint inhibitors (ICI) to chemotherapy (CT) has become a research hotspot in the therapy of metastatic triple-negative breast cancer. Nevertheless, controversial results have been revealed among the published randomized controlled trials. Hence, a meta-analysis was performed to assess the therapeutic effect of this treatment regimen.MethodsFive English databases (PubMed, WOS, CENTRAL, Scopus, and Embase), and four Chinese databases (CBM, CNKI, VIP, and Wanfang), as well as oncological meetings, were systematically searched to identify eligible studies that assessed the addition of ICI to CT versus CT alone in metastatic triple-negative breast cancer. The pooled hazard ratios (HR) of progression-free survival (PFS) and overall survival (OS) were estimated using fixed- or random-effect model. Subgroup analyses were also performed in the intention-to-treat (ITT) and PD-L1-positive individuals.ResultsAll told there are five eligible randomized controlled trials involving 3,000 patients were enrolled in this meta-analysis. Compared with CT alone, the ICI plus CT regimen significantly increased PFS in the ITT (HR = 0.80, 95% CI: 0.73–0.88) and PD-L1-positive (HR = 0.70, 95% CI: 0.62–0.79) populations, as well as OS in the ITT (HR = 0.89, 95% CI: 0.81–0.97) and PD-L1-positive populations (HR = 0.80, 95% CI: 0.71–0.91). Moreover, the PFS of sufferers treated with the combination strategy of ICI with CT increased alongside PD-L1 enrichment. A clinical benefit in terms of objective response rate was also distinctly observed in both populations treated with ICI plus CT. In the subgroup analysis, patients in the no prior CT subgroup experienced a striking increase in PFS in both populations; however, a difference was not observed in other subgroups.ConclusionsThe combination strategy striking improves PFS and OS in both ITT and PD-L1-positive populations, and PFS is prolonged with PD-L1 enrichment. Patients who do not receive CT prior to this treatment are associated with longer PFS in both populations.Systematic review registrationhttps://www.crd.york.ac.uk/PROSPERO/#recordDetails, identifier CRD42021289817.</p
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