45 research outputs found

    Homo (neo)religiosus

    Get PDF
    Fotoesej

    Supplemental Material - METTL3-mediated m6A modification of lncRNA SNHG3 accelerates gastric cancer progression by modulating miR-186-5p/cyclinD2 axis

    No full text
    Supplemental Material for METTL3-mediated m6A modification of lncRNA SNHG3 accelerates gastric cancer progression by modulating miR-186-5p/cyclinD2 axis by Guo Ji, Xiu Wang and Hao Xi in International Journal of Immunopathology and Pharmacology.</p

    Ultralong, Small-Diameter TiO<sub>2</sub> Nanotubes Achieved by an Optimized Two-Step Anodization for Efficient Dye-Sensitized Solar Cells

    No full text
    An optimized two-step anodization is developed to fabricate ultralong, small-diameter TiO<sub>2</sub> nanotubes, that is, with tube length of up to 31 μm and pore diameter of about 35 nm in this work. This overcomes the length limitation of small diameter tubes that usually presents in conventional one-step anodization. The small tubes with lengths of 23 μm yield a conversion efficiency of 5.02% in dye-sensitized solar cells under nonoptimized conditions

    Computer Study of Chromatographic Separation Process: A Monte Carlo Study of H‑Shaped and Linear Homopolymers in Good Solvent

    No full text
    The partitioning of linear (L) and H-shaped polymers between bulk solvent and narrow pores with inert and attractive walls and the conformational behavior of chains in pores was studied by Monte Carlo simulations. The polymer chains were modeled as self-avoiding walks in a good solvent. The concentration profiles in the pores, partition coefficients <i>K</i><sub>H</sub> and <i>K</i><sub>L</sub>, and various structural characteristics were calculated as functions of pore size and interaction parameter ε, ranging from 0 to −0.26. <i>K</i><sub>H</sub> is higher than <i>K</i><sub>L</sub> in pores with nonattractive walls, but the difference decreases with increasing |ε|. Both partition coefficients equal for ε* ca. −0.2, and later their sequence inverts. ε* depends only slightly on chain architecture and chain length. The results are important from the experimental point of view because they show that the improperly chosen experimental conditions can deteriorate SEC analysis of branched samples

    Data_Sheet_1_Wind loss model for the thick canopies of orchard trees based on accurate variable spraying.ZIP

    No full text
    Variable application by wind is an efficient application technology recommended by the Food and Agriculture Organization (FAO) of the United Nations that can effectively improve the deposition effect of liquid medicine in a canopy and reduce droplet drift. In view of the difficulty of modelling wind forces in orchard tree canopies and the lack of a wind control model, the wind loss model for a canopy was studied. First, a three-dimensional wind measurement test platform was built for an orchard tree canopy. The orchard tree was located in three-dimensional space, and the inner leaf areas of the orchard tree canopy and the wind force in different areas were measured. Second, light detection and ranging (LiDAR) point cloud data of the orchard tree canopy were obtained by LiDAR scanning. Finally, classic regression, partial least squares regression (PLSR), and back propagation (BP) neural network algorithms were used to build wind loss models in the canopy. The research showed that the BP neural network algorithm can significantly improve the fitting accuracy of the model. Under different fan speeds of 1,381 r/min, 1,502 r/min, and 1,676 r/min, the coefficient of determination (R2) of the model were 81.78, 72.85, and 69.20%, respectively, which were 19.38, 7.55, and 12.3% higher than those of the PLSR algorithm and 21.48, 22.25, and 24.3% higher than those of multiple regression analysis. The comparison showed that the BP neural network algorithm obtains the highest model accuracy, but because the model is not intuitive, PLSR has the advantages of intuitive and simple models in the three algorithms. In practical applications, the wind loss model based on a BP neural network or PLSR can be selected according to the operational requirements and software and hardware conditions. This study can provide a basis for wind control in precise variable spraying and promote the development of wind control technologies.</p

    Divergent Generation of the Difluoroalkyl Radical and Difluorocarbene via Selective Cleavage of C–S Bonds of the Sulfox-CF<sub>2</sub>SO<sub>2</sub>Ph Reagent

    No full text
    A new difluoroalkylation reagent Sulfox-CF2SO2Ph bearing both sulfoximine and sulfone moieties was prepared from commercially available SulfoxFluor and PhSO2CF2H. On one hand, the Sulfox-CF2SO2Ph reagent could act as a (phenylsulfonyl)difluoromethyl radical source under photoredox catalysis, in which the arylsulfoximidoyl group is selectively removed. On the other hand, under basic conditions, Sulfox-CF2SO2Ph could serve as a difluorocarbene precursor for S- and O-difluoromethylations with S- and O-nucleophiles, respectively, in which the phenylsulfonyl group in Sulfox-CF2SO2Ph is selectively removed (followed by α-elimination of the arylsulfoximidoyl group)

    Influence of the Chain Architecture and the Presence of End-Groups or Branching Units Chemically Different from Repeating Structural Units on the Critical Adsorption Point in Liquid Chromatography

    No full text
    The critical adsorption point (CAP) of linear and star-shaped polymers was investigated by normal phase and reversed phase liquid chromatography (NPLC and RPLC) and computer simulation. Three sets of polystyrenes (PS) differing in chain architecture and chemically distinct groups were prepared: linear PS (<i>sec</i>-butyl and hydrogen end group), 2-arm PS (linear, two <i>sec</i>-butyl end groups and one silyl group in the middle of the chain) and 4-arm star-shaped PS (four <i>sec</i>-butyl end groups and one silyl group in the center of the star). It was found that the column temperature at CAP, <i>T</i><sub>CAP</sub> (linear PS) = <i>T</i><sub>CAP</sub> (2-arm PS) > <i>T</i><sub>CAP</sub> (4-arm PS) in both RPLC and NPLC which can be attributed to the variation in chain architecture. However, the elution times at CAP of three polymers are all different: In NPLC, <i>t</i><sub>E,CAP</sub> (linear) > <i>t</i><sub>E,CAP</sub> (2-arm PS) > <i>t</i><sub>E,CAP</sub> (4-arm PS) while in RPLC, <i>t</i><sub>E,CAP</sub> (4-arm PS) > <i>t</i><sub>E,CAP</sub> (2-arm PS) > <i>t</i><sub>E,CAP</sub> (linear). The variation of <i>t</i><sub>E,CAP</sub> can be explained by the contribution of the chemically distinct groups. The computer simulation results are in good agreement with the chromatography experiments results and support the interpretation of experimental data

    Recyclable Nanoscale Zero Valent Iron Doped g‑C<sub>3</sub>N<sub>4</sub>/MoS<sub>2</sub> for Efficient Photocatalysis of RhB and Cr(VI) Driven by Visible Light

    No full text
    Photocatalytic materials for environmental remediation of organic pollution and heavy metals require not only a strong visible light response and high photocatalytic performance, but also the regeneration and reuse of catalysts. In this work, a ternary hybrid structure material of a nanoscale zero valent iron (Fe<sup>0</sup>) doped g-C<sub>3</sub>N<sub>4</sub>/MoS<sub>2</sub> layered structure (GCNFM) was synthesized by a facile strategy. Compared with the pure GCN, GCNM, and Fe-GCN, the photodegradation efficiency of the GCNFM toward the RhB and Cr­(VI) under visible light is considerably enhanced, to 98.2% for RhB and 91.4% for Cr­(VI), respectively. In addition, the reaction rate constants (K<sub>RhB</sub> and K<sub>Cr</sub>) of GCNFM are much higher than those of GCN, GCNM, and Fe-GCN, which is attributed to the fact that Fe<sup>0</sup> and MoS<sub>2</sub> composited with GCNM promote the separation of photogenerated electron–hole pairs. Moreover, with the loading of MoS<sub>2</sub> and/or Fe<sup>0</sup>, the holes could displace the <sup>•</sup>O<sup>2–</sup> as the main reactive oxygen species in GCN. GCNFM maintains an efficient degradation ability to both RhB and Cr­(VI) after several cycles, in spite of the fact that normally Fe<sup>0</sup> will be consumed and deactivated with the reduction proceeding as previously reported. This suggests that the photogenerated electrons, in response, can reduce the Fe­(III)/Fe­(II) to Fe<sup>0</sup>, inducing regeneration and reuse of Fe<sup>0</sup>. We anticipate this work can provide a good example for the design of efficient, visible light driven, and recyclable photocatalysts for environmental remediation of both organic pollution and heavy metals

    Synthesis and Adsorption Properties of Hierarchically Ordered Nanostructures Derived from Porous CaO Network

    No full text
    Using the porous framework of CaO as templates and reagents, we explored a surfactant-free and economical method for preparing calcium silicate hydrate (CSH) hierarchically ordered nanostructures. Incorporation of SiO<sub>2</sub> nanoparticles into the CaO framework, followed by a reaction assisted by hydrothermal treatment, resulted in the formation of CSH with well-defined morphologies. The structural features of CSH were characterized by 3-D hierarchical networks, wherein nanofibers assembled to form nanosheets, and nanosheets assembled to form hierarchically ordered structures. Investigation of the crystal growth mechanism indicated that the key to forming the CSH ordered assembly structure was confining the Ca/Si ratio within a small range. Nonclassic oriented aggregation mechanism was used to describe the crystal growth of nanosheets, while the porous CaO framework served as template/reagents responsible for the formation of hierarchical structures. The resulting CSH adsorbent exhibited better performance in removing Pb­(II) compared with other types of random CSH adsorbents. Additionally, the hierarchical structure of CSH provided more pores and active sites as support for other active functional materials such as zerovalent iron (Fe<sup>0</sup>). As-produced CSH@Fe nanocomposite with self-supported structures displayed high capacities for removal of Pb­(II) after five adsorption–desorption cycles, and high capacities for other heavy metal ions (Cu<sup>2+</sup>, Cd<sup>2+</sup>, and Cr<sub>2</sub>O<sub>7</sub><sup>2–</sup>) and organic contaminants
    corecore