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  • 1
    Online Resource
    Online Resource
    Enhancement of Alkene Epoxidation Activity of Titanosilicates by Gas‐Phase Ammonia Modification
    Wiley ; 2012
    In:  Chinese Journal of Chemistry Vol. 30, No. 9 ( 2012-09), p. 2205-2211
    Details
    In: Chinese Journal of Chemistry, Wiley, Vol. 30, No. 9 ( 2012-09), p. 2205-2211
    Abstract: Novel ammonia‐treated titanosilicates have been prepared by heating the samples of Ti‐MWW, TS‐1 and Ti‐Beta under pure ammonia gas flow at 673 K for a period of time. The ammonia modification improved their catalytic performance in liquid‐phase oxidations. Especially, the catalytic activities of ammonified Ti‐MWW, N‐Ti‐MWW, were enhanced greatly in the epoxidation of 1‐hexene with H 2 O 2 . The reason that the ammonia treatment played such an important role in post‐modification of titanosilicate was investigated in details. In comparison to the parent Ti‐MWW catalyst, N‐Ti‐MMW was more robust and produced less coke in oxidation reactions.
    Type of Medium: Online Resource
    ISSN: 1001-604X , 1614-7065
    URL: Issue
    URL: Article
    DOI: 10.1002/cjoc.v30.9
    DOI: 10.1002/cjoc.201200637
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 2144352-X
    SSG: 6,25
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  • 2
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    Progress on Li 3 VO 4 as a Promising Anode Material for Li‐ion Batteries
    Wiley ; 2017
    In:  Chinese Journal of Chemistry Vol. 35, No. 12 ( 2017-12), p. 1789-1796
    Details
    In: Chinese Journal of Chemistry, Wiley, Vol. 35, No. 12 ( 2017-12), p. 1789-1796
    Abstract: Vanadium oxide Li 3 VO 4 has attracted much attention as anode material for Li‐ion batteries in recent years since it has a low and safe redox potential (vs. Li metal), high specific capacity and its cost is low. However, the poor electronic conductivity and initial low coulombic efficiency limit its practical application. In this mini‐review, the state‐of‐the‐art results associated with Li 3 VO 4 are summarized including structure, lithium insertion mechanism, preparation, modification, and electrochemical properties. Finally, the challenges and prospects are also discussed.
    Type of Medium: Online Resource
    ISSN: 1001-604X , 1614-7065
    URL: Issue
    URL: Article
    DOI: 10.1002/cjoc.v35.12
    DOI: 10.1002/cjoc.201700196
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2144352-X
    SSG: 6,25
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  • 3
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    Breaking Structural Energy Constraints: Hydrothermal Crystallization of High‐Silica Germanosilicates by a Building‐Unit Self‐Growth Approach
    Wiley ; 2018
    In:  Chemistry – A European Journal Vol. 24, No. 50 ( 2018-09-06), p. 13297-13305
    Details
    In: Chemistry – A European Journal, Wiley, Vol. 24, No. 50 ( 2018-09-06), p. 13297-13305
    Abstract: Zeolites, a class of crystalline microporous materials, have a wide range of practical applications, in particular serving as key catalysts in petrochemical and fine‐chemical processes. Millions of zeolite topologies are theoretically possible. However, to date, only 235 frameworks with various tetrahedral element compositions have been discovered in nature or artificially synthesized, among which approximately 50 topologies are available in pure‐silica forms. Germanosilicates are becoming an important zeolite family, with a rapidly increasing number of topological structures having unusual double four‐membered ring (D4R) building units and large‐pore or extra‐large‐pore systems. The synthesis of their high‐silica analogues with higher (hydro)thermal stability remains a great challenge, because the formation of siliceous D4R units is kinetically and thermodynamically unfavorable in hydrothermal systems. Herein, it is demonstrated that such D4R‐containing high‐silica zeolites with unexpected crystalline topologies (ECNU‐24‐RC and IM‐20‐RC) are readily constructed by a versatile route. This strategy provides new opportunities for the synthesis of high‐silica zeolite catalysts that are hardly obtainable by conventional hydrothermal synthesis and may also facilitate a breakthrough in increasing the number and types of zeolite materials with practical applications.
    Type of Medium: Online Resource
    ISSN: 0947-6539 , 1521-3765
    URL: Issue
    URL: Article
    DOI: 10.1002/chem.v24.50
    DOI: 10.1002/chem.201802255
    RVK:
    VA 1120 ; VA 3507
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 1478547-X
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  • 4
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    METTL3 ‐m 6 A methylase regulates the osteogenic potential of bone marrow mesenchymal stem cells in osteoporotic rats via the Wnt signalling pathway
    Wiley ; 2022
    In:  Cell Proliferation Vol. 55, No. 5 ( 2022-05)
    Details
    In: Cell Proliferation, Wiley, Vol. 55, No. 5 ( 2022-05)
    Abstract: Bone marrow mesenchymal stem cells (BMSCs) hold a high osteogenic differentiation potential, but the mechanisms that control the osteogenic ability of BMSCs from osteoporosis (OP‐BMSCs) need further research. The purpose of this experiment is to discuss the osteogenic effect of Mettl3 on OP‐BMSCs and explore new therapeutic target that can enhance the bone formation ability of OP‐BMSCs. Materials and Methods The bilateral ovariectomy (OVX) method was used to establish the SD rat OP model. Dot blots were used to reveal the different methylation levels of BMSCs and OP‐BMSCs. Lentiviral‐mediated overexpression of Mettl3 was applied in OP‐BMSCs. QPCR and WB detected the molecular changes of osteogenic‐related factors and Wnt signalling pathway in vitro experiment. The staining of calcium nodules and alkaline phosphatase detected the osteogenic ability of OP‐BMSCs. Micro‐CT and histological examination evaluated the osteogenesis of Mettl3 in OP rats in vivo . Results The OP rat model was successfully established by OVX. Methylation levels and osteogenic potential of OP‐BMSCs were decreased in OP‐BMSCs. In vitro experiment, overexpression of Mettl3 could upregulate the osteogenic‐related factors and activate the Wnt signalling pathway in OP‐BMSCs. However, osteogenesis of OP‐BMSCs was weakened by treatment with the canonical Wnt inhibitor Dickkopf‐1. Micro‐CT showed that the Mettl3 (+) group had an increased amount of new bone formation at 8 weeks. Moreover, the results of histological staining were the same as the micro‐CT results. Conclusions Taken together, the methylation levels and osteogenic potential of OP‐BMSCs were decreased in OP‐BMSCs. In vitro and in vivo studies, overexpression of Mettl3 could partially rescue the decreased bone formation ability of OP‐BMSCs by the canonical Wnt signalling pathway. Therefore, Mettl3 may be a key targeted gene for bone generation and therapy of bone defects in OP patients.
    Type of Medium: Online Resource
    ISSN: 0960-7722 , 1365-2184
    URL: Issue
    URL: Article
    DOI: 10.1111/cpr.v55.5
    DOI: 10.1111/cpr.13234
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2019986-7
    SSG: 12
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  • 5
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    3D Electron Diffraction Unravels the New Zeolite ECNU‐23 from the “Pure” Powder Sample of ECNU‐21
    Wiley ; 2020
    In:  Angewandte Chemie Vol. 132, No. 3 ( 2020-01-13), p. 1182-1186
    Details
    In: Angewandte Chemie, Wiley, Vol. 132, No. 3 ( 2020-01-13), p. 1182-1186
    Abstract: A novel crystalline high‐silica zeolite with 12×8‐membered ring (R) channel system is prepared with the aid of the 3D electron diffraction (3D ED) technique. A crystal with the same topology as one of the predicted daughter structures of CIT‐13 germanosilicate, named ECNU‐23 (East China Normal University 23) was coincidentally detected by the 3D ED investigation during the structure characterization of the “pure” powder sample of existing one‐dimension (1D) 10‐R ECNU‐21. By controlling the alkaline‐assisted hydrolysis under moderate conditions, we purified the phase of ECNU‐23 by selectively breaking and removing the chemically weak Ge(Si)‐O‐Ge and metastable Si‐O‐Si bonds. Its structure was determined based on the 3D ED data, and confirmed by high‐resolution TEM images and powder X‐ray diffraction (PXRD) data. The aluminosilicate Al‐ECNU‐23 shows unique catalytic properties in the isomerization/ disproportionation of m ‐xylene as solid‐acid catalyst.
    Type of Medium: Online Resource
    ISSN: 0044-8249 , 1521-3757
    URL: Issue
    URL: Article
    DOI: 10.1002/ange.v132.3
    DOI: 10.1002/ange.201912488
    RVK:
    VA 2100
    RVK:
    VN 5020
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 505868-5
    detail.hit.zdb_id: 506609-8
    detail.hit.zdb_id: 514305-6
    detail.hit.zdb_id: 505872-7
    detail.hit.zdb_id: 1479266-7
    detail.hit.zdb_id: 505867-3
    detail.hit.zdb_id: 506259-7
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  • 6
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    Chiral Metamaterials: Room‐Temperature Active Modulation of Valley Dynamics in a Monolayer Semiconductor through Chiral Purcell Effects (Adv. Mater. 49/2019)
    Wiley ; 2019
    In:  Advanced Materials Vol. 31, No. 49 ( 2019-12)
    Details
    In: Advanced Materials, Wiley, Vol. 31, No. 49 ( 2019-12)
    Type of Medium: Online Resource
    ISSN: 0935-9648 , 1521-4095
    URL: Issue
    URL: Article
    DOI: 10.1002/adma.v31.49
    DOI: 10.1002/adma.201970347
    RVK:
    UA 1538
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1474949-X
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  • 7
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    Direct Synthesis and Delamination of Swollen Layered Ferrierite for the Reductive Etherification of Furfural
    Wiley ; 2022
    In:  ChemCatChem Vol. 14, No. 16 ( 2022-08-19)
    Details
    In: ChemCatChem, Wiley, Vol. 14, No. 16 ( 2022-08-19)
    Abstract: A swollen ferrierite structure (denoted as ECNU‐35P) was directly synthesized with a commercially available surfactant of decamethonium hydroxide as bifunctional organic structure‐directing agent (OSDA). ECNU‐35P, with elastic long‐chain surfactant intercalating the neighboring FER layers, had a much wider interlayer spacing than previously reported FER‐type layered precursors of PLS‐3 and PREFER. The phase delamination of ECNU‐35P was readily realized without additional swelling process that is destructive to zeolite frameworks. The non‐corrosive delaminated derivative (DECNU‐35) was composed of the FER nanosheets with 4 nm‐thickness. With large external surface area, abundant mesopores and moderate acidity, Pd/DECNU‐35 served as highly active and robust catalysts in the reductive etherification of biomass furfural, providing a high yield of 74 % for the biofuel of furfuryl ethyl ether.
    Type of Medium: Online Resource
    ISSN: 1867-3880 , 1867-3899
    URL: Issue
    URL: Article
    DOI: 10.1002/cctc.v14.16
    DOI: 10.1002/cctc.202200535
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2501161-3
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  • 8
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    Online Resource
    3D Electron Diffraction Unravels the New Zeolite ECNU‐23 from the “Pure” Powder Sample of ECNU‐21
    Wiley ; 2020
    In:  Angewandte Chemie International Edition Vol. 59, No. 3 ( 2020-01-13), p. 1166-1170
    Details
    In: Angewandte Chemie International Edition, Wiley, Vol. 59, No. 3 ( 2020-01-13), p. 1166-1170
    Abstract: A novel crystalline high‐silica zeolite with 12×8‐membered ring (R) channel system is prepared with the aid of the 3D electron diffraction (3D ED) technique. A crystal with the same topology as one of the predicted daughter structures of CIT‐13 germanosilicate, named ECNU‐23 (East China Normal University 23) was coincidentally detected by the 3D ED investigation during the structure characterization of the “pure” powder sample of existing one‐dimension (1D) 10‐R ECNU‐21. By controlling the alkaline‐assisted hydrolysis under moderate conditions, we purified the phase of ECNU‐23 by selectively breaking and removing the chemically weak Ge(Si)‐O‐Ge and metastable Si‐O‐Si bonds. Its structure was determined based on the 3D ED data, and confirmed by high‐resolution TEM images and powder X‐ray diffraction (PXRD) data. The aluminosilicate Al‐ECNU‐23 shows unique catalytic properties in the isomerization/ disproportionation of m ‐xylene as solid‐acid catalyst.
    Type of Medium: Online Resource
    ISSN: 1433-7851 , 1521-3773
    URL: Issue
    URL: Article
    DOI: 10.1002/anie.v59.3
    DOI: 10.1002/anie.201912488
    RVK:
    VA 2100
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2011836-3
    detail.hit.zdb_id: 123227-7
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  • 9
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    ECNU‐13: A High‐Silica Zeolite with Three‐Dimensional and High‐Connectivity Multi‐Pore Structures for Selective Alkene Cracking
    Wiley ; 2023
    In:  Angewandte Chemie Vol. 135, No. 15 ( 2023-04-03)
    Details
    In: Angewandte Chemie, Wiley, Vol. 135, No. 15 ( 2023-04-03)
    Abstract: A high‐silica zeolite ECNU‐13 (Si/Al=23) with a new three‐dimensional (3D) pore system and a nanosized morphology has been developed, consisting of multitudes of 10‐membered ring (10‐R) medium pores and one set of 8‐R small pores. A phase‐discrimination strategy was proposed to synthesize ECNU‐13 by regulating the gel compositions and nucleation processes that were used for preparing 12‐R large‐pore germanosilicate IM‐20 with the known UWY topology. The crystallization was directed towards forming one set of single four‐ring ( s4r ) composite building units together with one set of double four‐ring ( d4r) rather than two different types of d4r units in IM‐20. The electron crystallographic investigations elucidated that the ECNU‐13 structure was composed of two kinds of polymorphs as a result of distinct atomic positionings in s4r units. In catalytic cracking of 1‐butene, ECNU‐13 exhibited high propene selectivity (55.6 %) and propene to ethylene molar ratio ( 〉 4.7) superior to well‐studied conventional ZSM‐5 zeolite catalyst.
    Type of Medium: Online Resource
    ISSN: 0044-8249 , 1521-3757
    URL: Issue
    URL: Article
    DOI: 10.1002/ange.v135.15
    DOI: 10.1002/ange.202217004
    RVK:
    VA 2100
    RVK:
    VN 5020
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 505868-5
    detail.hit.zdb_id: 506609-8
    detail.hit.zdb_id: 514305-6
    detail.hit.zdb_id: 505872-7
    detail.hit.zdb_id: 1479266-7
    detail.hit.zdb_id: 505867-3
    detail.hit.zdb_id: 506259-7
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  • 10
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    User's image perception improved strategy and application of augmented reality systems in smart medical care: A review
    Wiley ; 2023
    In:  The International Journal of Medical Robotics and Computer Assisted Surgery Vol. 19, No. 3 ( 2023-06)
    Details
    In: The International Journal of Medical Robotics and Computer Assisted Surgery, Wiley, Vol. 19, No. 3 ( 2023-06)
    Abstract: Augmented reality (AR) is a new human‐computer interaction technology that combines virtual reality, computer vision, and computer networks. With the rapid advancement of the medical field towards intelligence and data visualisation, AR systems are becoming increasingly popular in the medical field because they can provide doctors with clear enough medical images and accurate image navigation in practical applications. However, it has been discovered that different display types of AR systems have different effects on doctors' perception of the image after virtual‐real fusion during the actual medical application. If doctors cannot correctly perceive the image, they may be unable to correctly match the virtual information with the real world, which will have a significant impact on their ability to recognise complex structures. Methods This paper uses Citespace, a literature analysis tool, to visualise and analyse the research hotspots when AR systems are used in the medical field. Results A visual analysis of the 1163 articles retrieved from the Web of Science Core Collection database reveals that display technology and visualisation technology are the key research directions of AR systems at the moment. Conclusion This paper categorises AR systems based on their display principles, reviews current image perception optimisation schemes for various types of systems, and analyses and compares different display types of AR systems based on their practical applications in the field of smart medical care so that doctors can select the appropriate display types based on different application scenarios. Finally, the future development direction of AR display technology is anticipated in order for AR technology to be more effectively applied in the field of smart medical care. The advancement of display technology for AR systems is critical for their use in the medical field, and the advantages and disadvantages of various display types should be considered in different application scenarios to select the best AR system.
    Type of Medium: Online Resource
    ISSN: 1478-5951 , 1478-596X
    URL: Issue
    URL: Article
    DOI: 10.1002/rcs.v19.3
    DOI: 10.1002/rcs.2497
    RVK:
    XA 49983
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2156187-4
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