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Graphite expandable polystyrene (GEPS) has the advantage of low thermal conductivity, however, the disadvantage of the low compatibility with styrene and a tendency to agglomerate, which limits the application of GEPS in the thermal insulation industry. In this article, the high-dispersion GEPS beads were prepared by homogeneous dissolution-suspension polymerization method. Then, the GEPS beads were foamed, molded, and cured to form GEPS foam boards. The characterization results of IR, scanning electron microscope, X-ray diffraction, and thermogravimetric analyzer of GEPS beads, the microporous structure, water absorption, flexural strength, compressive strength, and oxygen index of GEPS foam board show that the performance is equal to or exceeds corporate expandable polystyrene. In particular, the thermal conductivity of GEPS foam (0.034 W/(mk)) is 10.5% lower than that of corporate EPS (0.038 W/(mk)). In addition, it is noteworthy that the dissolution of waste expandable polystyrene or polystyrene beads reaches up to 45% of the styrene monomer mass, while the enterprise can dissolve only 5.2%. KEYWORDS dispersed graphite, expanded polystyrene, foam, 1 | INTRODUCTION Expandable polystyrene (EPS), with its good thermal insulation, shock resistance, water resistance and anti-aging properties, has a wide range of applications in the field of construction materials [...]

The main purpose of this study is to investigate how destination authenticity interacts with place attachment and loyalty and whether self-authenticity moderate these relationships at a traditional village-Luoyi, Hainan, China. Based on the literature, four facets of destination authenticity are investigated: object-based authenticity, intrapersonal authenticity, transformative experience and interpersonal authenticity. The empirical findings indicate that object-based authenticity, intrapersonal authenticity, transformative experience lead tourists not only to be emotionally attached to a destination but, to enhance destination loyalty. Object-based authenticity and intrapersonal authenticity led to higher place attachment for consumers high in self-authenticity. With the empirical results, theoretical and managerial implications are discussed. [ABSTRACT FROM AUTHOR]

Copyright of Rare Metals is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rare Metals is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

ABTEM was presented, an availability based trust model, and many availability oriented security service can be obtained based on this model. The performance results show that malicious nodes can be successfully discovered in accordance with its malicious acts in the routing layer when apply ABTEM on the DSR protocol. Furthermore malicious nodes can be isolated to protect the network from the attack of them, and which will significantly increases system avail- ability.

The robot-assisted insertion surgery plays a crucial role in biopsy and therapy. This study focuses on determining the optimum puncture pattern for robot-assisted insertion, aiming at the matching problem of needle insertion parameters, thereby to reduce the pain for patients and to improve the reachability to the lesion point. First, a 6-degrees of freedom (DOFs) Computed Tomography (CT)-guided surgical robotic system for minimally invasive percutaneous lung is developed and used to perform puncture experiments. The effects of four main insertion factors on the robotic puncture are verified by designing the orthogonal test, where the inserting object is the artificial skin-like specimen with high transparent property and a digital image processing method is used to analyze the needle tip deflection. Next, the various phases of puncture process are divided and analyzed in detail in view of the tissue deformation and puncture force. Then, short discussion on the comparison of puncture force with different effect factors for the same beveled needle is presented. The same pattern can be observed for all of the cases. Finally, based on the experimental data, the formulations of the puncture force and needle deflection which depends on Gauge size, insertion velocity, insertion angle, and insertion depth are developed using the multiple regression method, which can be used to get an optimum puncture pattern under the constrains of minimum peak force and minimum needle tip deflection. The developed models have the effectiveness and applicability on determining the optimum puncture pattern for one puncture event, and which can also provide insights useful for the setting of insertion parameters in clinical practice. [ABSTRACT FROM AUTHOR]

Stromal cell‐derived factor‐1 (SDF‐1) and CXC chemokine receptor 4 (CXCR4) have been found to be tightly correlated with the progression of prostate cancer (PC). In this study, we investigated the effects of an SDF‐1α/CXCR4 inhibitor, AMD3100, on cell progression and metastasis potential of human PC cells. Human PC cell lines (LNCaP, PC3, and DU145) were cultured to detect SDF‐1α/CXCR4, which showed higher SDF‐1α and CXCR4 expression than the normal human prostate epithelial cell line, RWPE‐1. AMD3100 was confirmed to be an inhibitor of SDF‐1α, and to detect the effect of SDF‐1α/CXCR4 inhibition on PC, PC cells were treated with AMD3100 or/and CXCR4 siRNA. The results suggested that inhibition of the SDF‐1α/CXCR4 pathway could promote the E‐cadherin level but inhibit the levels of invasion and migration of vimentin, N‐cadherin and α5β1 integrin. Finally, tumor formation in nude mice was conducted, and the cell experiment results were verfied. These data show that AMD3100 suppresses epithelial–mesenchymal transition and migration of PC cells by inhibiting the SDF‐1α/CXCR4 signaling pathway, which provides a clinical target in the treatment of PC. [ABSTRACT FROM AUTHOR]

Herein, a new 3D POMOF [{Cl4Cu10(pz)11}{As2W18O62}]·1.5H2O (pz = pyrazine) (1) has been synthesized using a hydrothermal reaction, and characterized by single-crystal X-ray diffraction analysis, elemental analysis, IR, TG, and UV-vis-NIR spectroscopy, XPS, BET analysis and XRD. Single crystal X-ray analysis reveals that compound 1 consists of the classical Wells–Dawson [As2W18O62]6− polyoxoanion and {Cl4Cu10(pz)11} complexes. Compound 1 possesses two different channels which form a 3D topology framework with the Schläfli symbol of {3·4·56·67}2{3·46·53}2{32·42·56·65}. Additionally, compound 1 shows photoluminescence properties and excellent photocatalytic activity for the degradation of RhB dye under UV irradiation. The photocatalytic reaction kinetics and mechanism have been also investigated. [ABSTRACT FROM AUTHOR]

The arsenomolybdates [H2As2Mo6O26(H2O)]·(H2biyb)2· 2H2O (1) and [H3As2Mo6O26]·(H3pt)2 (2) [biyb = 1,4-bis(imidazol-1-ylmethyl)benzene, pt = 4'-(3"-pyridyl)-2,3':6'3"-terpyridine] were synthesized via hydrothermal method. The structures of the compounds were characterized by single-crystal X-ray diffraction analyses, elemental analyses, IR spectroscopy, and TG analysis. Compounds 1 and 2 exhibit two isomeric forms of [HxAs2Mo6O26](6-x)-. The structure of 1 is constructed from the B-type [H2As2Mo6O26(H2O)]4- poly-anions and free biyb ligands via weak interactions to form 3D supramolecular framework with a {3·4·5³·6}{3·4³·5²}{3·5·6}2{3·5²}² topology structure. In compound 2, the A-type [H3As2Mo6O26]3- clusters are surrounded by pt ligands through hydrogen bond interactions forming 3D supramolecular framework with a {4³·6³}²{46·66·8³} topology structure. The electrochemical behaviors, electrocatalytic and photocatalytic activities of 1 and 2 are detected. [ABSTRACT FROM AUTHOR]

Herein, two Wells –Dawson-type arsenomolybdates, formulated as [Cu(pyr)2]6[As2Mo18O62] (1) and [Ag(pyr)2]6[As2Mo18O62] (2) (pyr = pyrazole), were hydrothermally synthesized and structurally characterized via single-crystal X-ray diffraction, elemental analysis, IR and UV-vis-NIR spectroscopies, XPS, XRD, and TG analysis. The structural analysis indicated that compounds 1 and 2 were isomorphic. They are the first reported 3D honeycomb structures of Wells–Dawson-type arsenomolybdates. The [M(pyr)2] (M = Cu and Ag) connected with [As2Mo18O62]6− polyoxoanions to form the {812·123}{8}3 topological structure. The contributions of organic ligands, pH value, reaction temperature, and transition-metal (TM) to the construction of 3D networks were elucidated. Furthermore, compounds 1 and 2 exhibited fluorescence properties in the solid state at room temperature, highly efficient catalytic ability for the degradation of five organic dyes (MB, RhB, MO, AP, and CR) under UV irradiation, and obvious electrocatalytic activities for the reduction of H2O2. The mechanisms of photocatalysis and electrocatalysis have also been discussed in detail. [ABSTRACT FROM AUTHOR]

A series of organic–inorganic hybrid compounds, [{Cu(4,4′-bipy)1.5(H2O)2}2{H2As2Mo6O26}] (1), [{Cu (biim)2}2{HAs2Mo6O26}{Cu(biim)Cl}]·H2O (2), (H2bib)[{Cu(H2O)2(bib)}{H2As2Mo6O26}]·2H2O (3), [{(Hbix)Cu(bix)0.5}2{As2Mo6O26}]·2H2O (4), [{Cu(bmb)1.5(H2O)}2{H2As2Mo6O26}]·2H2O (5), 0 and [{Cu2(bth)4}{H2As2Mo6O26}]·H2O (6) (4,4′-bipy = 4,4′-bipyridine; biim = biimidazole; bib = 1,4-bis(1-imidazolyl)benzene; bix = 1,4-bis(imidazol-1-ylmethyl)benzene; bmb = 1,4-bis(benzimidazol-1-yl)benzene; bth = 1,6-bis(1,2,4-triazol-lyl)hexane), were hydro-thermally synthesized and structurally characterized via elemental analysis, TG, IR, XPS, XRD, and single-crystal X-ray diffraction. The crystal structures 1–6 are formed by metal–organic complexes and the [HxAs2Mo6O26](6−x)− cluster. Compounds 1–2 feature infinite 1D-chain structures. Compounds 3–5 form 2D-layer structures in which Cu cations are five-, six-coordinated with polyoxoanions and organic ligands. Notably, compound 6 introduces the POM system into a metal–organic framework (MOF) to form a unique POMOF {42·611·82}{42·64}{44·69·7·8} topological structure. The coordination modes of the [HxAs2Mo6O26](6−x)− cluster in compounds 2, 5 and 6 are reported for the first time. The photocatalytic properties of 1–6 are studied for the decomposition of methylene blue (MB) under UV light. In addition, all the compounds exhibit good electrocatalytic performances for the reduction of nitrite. [ABSTRACT FROM AUTHOR]