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73 results on '"Li, Xingyao"'

52. InsP 7 is a small-molecule regulator of NUDT3-mediated mRNA decapping and processing-body dynamics

Author

Sahu, Soumyadip, primary, Wang, Zhenzhen, additional, Jiao, Xinfu, additional, Gu, Chunfang, additional, Jork, Nikolaus, additional, Wittwer, Christopher, additional, Li, Xingyao, additional, Hostachy, Sarah, additional, Fiedler, Dorothea, additional, Wang, Huanchen, additional, Jessen, Henning J., additional, Kiledjian, Megerditch, additional, and Shears, Stephen B., additional

Published
2020
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56. Structure-dependent catalysis of Co3O4 crystals in persulfate activation via nonradical pathway

Author

Li Xingyao, Haiying Wang, Jie Zhao, Chaofang Li, Weichun Yang, Qi Liao, and Jiang Zhi

Subjects
chemistry.chemical_classification, Reactive oxygen species, Quenching (fluorescence), Singlet oxygen, General Physics and Astronomy, 02 engineering and technology, Surfaces and Interfaces, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Persulfate, Photochemistry, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, Catalysis, law.invention, chemistry.chemical_compound, chemistry, law, Hydroxyl radical, Orange G, 0210 nano-technology, Electron paramagnetic resonance
Abstract

Co3O4 crystals with different shapes and surface structures were successfully synthesized. The shapes obtained included flower-like nanoplates (FN), nanocubes (NC), nanosheets (NS) and flake-stacked microsphere (FM). The shapes and surface structures of the Co3O4 catalysts significantly affected their catalytic activity. Among the as-synthesized Co3O4 catalysts, the NC sample displayed the highest catalytic activity in persulfate (PS) activation, achieving almost complete removal of 30 mg L−1 orange G (OG) within 10 min at the reaction conditions of 0.5 g L−1 catalyst and 8.0 mM PS. The excellent catalytic performance of NC sample could be ascribed to dominant exposed crystal plane and abundant surface hydroxyl groups. The electron paramagnetic resonance (EPR) and radical quenching tests demonstrated that reactive oxygen species (ROS) including sulfate radical (·SO4−), hydroxyl radical (·OH), superoxide radical (·O2–) and singlet oxygen (1O2) were generated in the NC/PS system, while 1O2 was dominantly attributed to the OG degradation. The exposed plane of (1 1 1) may be responsible for the generation of 1O2. The study dedicates a novel mechanism of PS heterogeneous activation by Co3O4 crystals and provides an ideal catalyst for efficient removal of organic pollutants in wastewater.

Published
2020

60. Microstructure and mechanical properties of Mg –2Gd –3Y –0.6Zr alloy upon conventional and hydrostatic extrusion

Author

Talal Al-Samman, Chuming Liu, and Li Xingyao

Subjects
Materials science, Mechanical Engineering, Metallurgy, Alloy, engineering.material, Condensed Matter Physics, Microstructure, Mechanics of Materials, Ultimate tensile strength, engineering, General Materials Science, Extrusion, Texture (crystalline), Fiber, Elongation, Composite material, Ductility
Abstract

The Mg–12Gd–3Y–0.6Zr (wt. %) alloy was subjected to conventional and hydrostatic extrusion in two subsequent steps. The best combination of mechanical properties (strength and ductility) was achieved by RT hydrostatic extrusion following conventional extrusion at 430 °C, with the ultimate tensile strength (UTS), tensile yield strength (TYS) and elongation being 485 MPa, 413 MPa and 5.2% at room temperature. The texture results of extruded rods indicate that the c -axis of most grains was aligned preferentially perpendicular to the extrusion direction, forming a typical extrusion Mg fiber texture.

Published
2011

73. [Diagnostic value of (18)F-FDG PET/CT in extrapulmonary tuberculosis].

Author

Liu W, Li X, Yin J, Li X, and Wang X

Subjects
Adolescent, Adult, Aged, Aged, 80 and over, Female, Fluorodeoxyglucose F18, Humans, Male, Middle Aged, Retrospective Studies, Young Adult, Positron-Emission Tomography, Tomography, X-Ray Computed, Tuberculosis diagnostic imaging
Abstract

Objective: To explore the value of (18)F-FDG PET/CT in the diagnosis of extrapulmonary tuberculosis (ET)., Methods: The imaging data from 88 cases of ET undergoing (18)F-FDG PET/CT examinations between August, 2005 and May, 2011 were analyzed retrospectively., Results: All the 88 cases showed high (18)F-FDG uptake on PET imaging with a SUVmax ranging from 1.3 to 23.2. In 19 of the 88 cases, the extrapulmonary lesions were misdiagnosed as malignant neoplasms. Twenty-two patients were found to have phthisis. According to locations, the lesions were classified into 4 basic types, namely membranous tuberculosis (36 cases) with soft tissue thickening as the main manifestation (only 6 cases did not present with obvious thickening), lymphatic tuberculosis (44 cases) with lymph node enlargement (ill-defined edge in 22 cases, central necrosis in 3 cases, and ring-like enhancement in enhanced CT scan in 6 cases), osteoarticular tuberculosis ( 28 cases) with the main findings of osteolytic destruction with or without osteosclerosis (tuberculosis of the spine was characterized by disc damage and paravertebral cold abscess; only one case showed high FDG uptake without bone destruction), and organ tuberculosis (25 cases) involving the liver, spleen, pancreas, kidney and brain, where lesions of low density were detected in CT scan (3 cases showed ring-like enhancement). In cases of organ tuberculosis, nasopharyngeal and laryngeal tuberculosis showed soft tissue thickening, and intestinal tuberculosis presented with slight intestinal wall thickening (involving multiple segments in 2 cases). Of the 88 cases, 30 had two or more than two lesion types., Conclusion: PET/CT can accurately demonstrate the morphology, extent of involvement and uptake activity of the ET lesions to assist the early diagnosis and treatment of ET. Enhanced CT scan also helps in the differential diagnosis of the lesions.

Published
2013

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