180 research outputs found

    Some Issues on Lateral Vehicle Dynamics and Steering Control

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    This thesis focuses on the design of high-quality controllers for lane-keeping systems and parameter estimation of lateral vehicle dynamics. As the use of lane-keeping systems in road vehicles brings many advantages, including improved driving safety, enhanced vehicle reliability, reduced fuel consumption and optimization of highway resources, the research on this thesis can further improve the existing lane-keeping systems and bring more social and economic benefits.</p

    Acid-Exfoliated Metallic Co<sub>0.85</sub>Se Nanosheets as Cocatalyst on Cd<sub>0.5</sub>Zn<sub>0.5</sub>S for Photocatalytic Hydrogen Evolution under Visible-Light Irradiation

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    Co0.85Se, nonstoichiometric phase, as an excellent electrocatalytic activity, was used as a cocatalyst to modify Cd0.5Zn0.5S nano-photocatalyst. The Co0.85Se (1.5 wt %)/Cd0.5Zn0.5S Schottky junction shows the greatest activity for H2 generation (759.3 μmol h–1), which is 2.1 times that of bare Cd0.5Zn0.5S (350.6 μmol h–1). It turns out that Co0.85Se nanoplates can be exfoliated into nanosheets by diluted hydrochloric acid. It is noted that exfoliated metallic Co0.85Se nanosheets show a little better hydrogen evolution reaction property and a smaller charge-transfer resistance than those of Co0.85Se nanoplates, implying that exfoliated Co0.85Se nanosheets have more active sites and higher electrical conductivity. The distinct properties of exfoliated metallic Co0.85Se nanosheets enhance the efficient spatial separation of photoinduced charged particle carriers and result in an excellent enhancement in the photoelectric current and photocatalytic hydrogen evolution performance of Cd0.5Zn0.5S. The amount of Co0.85Se in the heterojunction has an obvious effect on the hydrogen evolution property. The consequences show that 1.5 wt % exfoliated Co0.85Se nanosheets added into the Cd0.5Zn0.5S sample result in the maximum water splitting rate of 759.3 μmol h–1. For other semiconductor photocatalyst systems, our work demonstrates that introducing exfoliated metallic Co0.85Se nanosheets electrocatalyst as an efficient cocatalyst to improve photocatalytic capacity without noble metals is feasible

    K<sub>2</sub>RbB<sub>8</sub>PO<sub>16</sub>: A Borophosphate with Moderate Birefringence and Deep-Ultraviolet Transmission

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    A new borophosphate, K2RbB8PO16 (KRBPO) was synthesized. It exhibits a bilayer structure consisting of two B–O layers with an 18-membered ring (18-MR) joined by [PO4], which is composed of the π-conjugated group [BO3] and non-π-conjugated groups [BO4] and [PO4]. The UV–vis–NIR diffuse reflectance spectroscopy shows that the cutoff edge is less than 200 nm. The calculation indicates that KRBPO exhibits moderate birefringence of 0.057@1064 nm, and the source of birefringence is mainly from the [BO3] groups

    Additional file 1: of Facile Solution Synthesis of Red Phosphorus Nanoparticles for Lithium Ion Battery Anodes

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    Figure S1. The reaction process of RPNPs via the solution synthesis. Figure S2. Optical images of RPNPs and commercial RP powders. Figure S3. I-V curves of RPNPs. Figure S4. SEM images of commercial RP. (DOCX 631 kb

    Mitochondrial membrane potential, ROS production, arginase, and IDOs in wild type (HD1A) and <i>lal</i>-/- (HD1B) cells.

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    <p>(A) Live wild type (HD1A) and <i>lal</i>-/- (HD1B) cells were stained with JC1 to measure the mitochondria membrane potential. JC1 fluorescent red staining represents a healthy membrane potential state, while JC1 fluorescent green staining represents a damaged membrane potential state. (B) The ROS levels in wild type (HD1A) and <i>lal</i>-/- (HD1B) cells by flow cytometry analysis. Results are mean ± SD from three independent experiments (n = 3), **, p< 0.001. (C) The arginase activity in HD1A and HD1B were measured. The result is mean ± SD from three independent experiments (n = 3), **, p< 0.001. (D) The IDO1 and IDO2 expression levels were measured by Real-Time. The results are means ± SD from three independent experiments (n = 3), **, p< 0.001.</p

    Gold Nanoparticle-Based Colorimetric Recognition of Creatinine with Good Selectivity and Sensitivity

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    A gold nanoparticle-based colorimetric sensor for the determination of creatinine was developed as an important index for early diagnosis of kidney function and corresponding renal diseases. Because of the unique synergistic coordination capability of adenosine and creatinine with Ag<sup>+</sup> on a particle surface, our system exhibits an excellent selectivity to creatinine among various ions and biomolecules. There are good linear relationships of absorption changes (<i>A</i><sub>630 nm/520 nm</sub>) over creatinine concentrations, so both colorimetric qualitative detection by the naked eye and quantitative determination by UV–vis spectrometer could be realized with an excellent limit of detection compared with that of other methods. Finally, by testing creatinine in practical samples, such as urine mimic and bovine serum, good recoveries were obtained with proper relative standard deviations

    Glucose transportation, glycolysis and TCA in HD1A and HD1B cells.

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    <p>(<b>A</b>) The glucose and pyruvate concentrations, and aconitase activity in wild type (HD1A) and <i>lal</i>-/- (HD1B) cells. The results are means ± SD from three independent experiments (n = 3), *, p< 0.05, **, p< 0.001. (<b>B</b>) Expression of <i>Glut1 to Glut13</i> with the housekeeping gene β-<i>Actin</i> as internal control by Real-time PCR. The results are means ± SD from three independent experiments (n = 3), *, p< 0.05, **, p< 0.001.</p

    Increase of lysosome genesis and metabolic disorder in HD1B cells.

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    <p>(A) Western blot analysis of lysosome marker LAMP1 expression in wild type (HD1A) and <i>lal</i>-/- (HD1B) cells; (B) Immunofluorescence staining of LAMP1 in wild type (HD1A) and <i>lal</i>-/- (HD1B) cells. Bars = 20 μm; (C) LysoTracker Red DND-99 staining of live wild type (HD1A) and <i>lal</i>-/- (HD1B) cells. Bar = 25 μm. (<b>D</b>) Expression of CD36, Foxo3, Sirt1, CPT1, CPT2, CPT3 with the housekeeping gene β-Actin as internal control by Real-time PCR. The results are means ± SD from three independent experiments (n = 3), *, p< 0.05, **, p< 0.001.</p

    Immunosuppression on T cell proliferation and function by wild type (HD1A) and <i>lal</i>-/- (HD1B) cells.

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    <p>(A) CFSE labeled wild type CD4<sup>+</sup> T cells were stimulated with anti-CD3 and anti-CD28 antibodies, and co-cultured with wild type (HD1A) or <i>lal</i>-/- (HD1B) cells (1:30). CD3 and CD28 antibody unstimulated CD4<sup>+</sup> T cells served as a negative control. Results are mean ± SD from three independent experiments (n = 3), *, p< 0.05; **, p<0.01. (B) Secretion of T cell releasing IL-2, IL-4 and INF-γ in the above co-culture experiment was measured to assess the CD4<sup>+</sup> T cell function. Results are mean ± SD from three independent experiments (n = 3), *, p< 0.05; **, p<0.01.</p
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