36 results on '"Cui-Wei Li"'
Search Results
2. Association Between Programmed Death-Ligand 1 Expression and Clinicopathological Characteristics, Structural Recurrence, and Biochemical Recurrence/Persistent Disease in Medullary Thyroid Carcinoma
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Qinghai Ji, Yu-Long Wang, Cui-Wei Li, Wen-Jun Wei, Ben Ma, Rong-Liang Shi, Peng-Cheng Yu, Li-Cheng Tan, Bo-Wen Lei, Jia-Qian Hu, Yu Wang, Nai-Si Huang, Yan Zhang, Weibo Xu, Xiao Shi, Tong-Zhen Chen, Xiao Wang, and Jie Wang
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Adult ,Male ,Biochemical recurrence ,Adolescent ,endocrine system diseases ,Medullary cavity ,Endocrinology, Diabetes and Metabolism ,B7-H1 Antigen ,Thyroid carcinoma ,Young Adult ,Endocrinology ,hemic and lymphatic diseases ,Humans ,Medicine ,Thyroid Neoplasms ,Child ,Aged ,Neoplasm Staging ,Retrospective Studies ,Aged, 80 and over ,business.industry ,Middle Aged ,respiratory system ,Ligand (biochemistry) ,digestive system diseases ,Carcinoma, Neuroendocrine ,Persistent Disease ,Cancer research ,Female ,Neoplasm Recurrence, Local ,business ,circulatory and respiratory physiology ,Programmed death - Abstract
Background: Expression of the programmed death-ligand 1 (PD-L1) in medullary thyroid carcinoma (MTC) has been rarely reported. In this study, we evaluated PD-L1 positivity in MTC and analyzed its c...
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- 2019
3. Five-year follow-up study of a kidney-tonifying herbal Fufang for prevention of postmenopausal osteoporosis and fragility fractures
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Deng, Wei-min, Zhang, Peng, Huang, Hai, Shen, You-gao, Yang, Qin-hua, Cui, Wei-li, He, Yang-shu, Wei, Song, Ye, Zhu, Liu, Fang, and Qin, Ling
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- 2012
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4. A 4 Gene-based Immune Signature Predicts Dedifferentiation and Immune Exhaustion in Thyroid Cancer
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Yu-Long Wang, Cui-Wei Li, Tian Liao, Ben Ma, Qinghai Ji, Zhongwu Lu, Yu Wang, Xiao Shi, and Wen-Jun Wei
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medicine.medical_specialty ,PRKCQ ,Endocrinology, Diabetes and Metabolism ,Bone Morphogenetic Protein 7 ,Clinical Biochemistry ,Context (language use) ,Biology ,medicine.disease_cause ,Biochemistry ,Receptors, Urokinase Plasminogen Activator ,Endocrinology ,Immune system ,Internal medicine ,Cell Line, Tumor ,medicine ,Biomarkers, Tumor ,Humans ,Thyroid Neoplasms ,Thyroid cancer ,IRGs ,PSMD2 ,Mutation ,Gene Expression Profiling ,Biochemistry (medical) ,Cell Dedifferentiation ,medicine.disease ,Prognosis ,TNF Receptor-Associated Factor 2 ,Gene Expression Regulation, Neoplastic ,Protein Kinase C-theta ,Cancer research ,Signal transduction ,Transcriptome - Abstract
Context The role of immune-related genes (IRGs) in thyroid cancer dedifferentiation and accompanying immune exhaustion remains largely unexplored. Objective To construct a significant IRG-based signature indicative of dedifferentiation and immune exhaustion in thyroid cancer. Design and Settings One exploratory cohort and 2 validation cohorts were used to identify stably dysregulated IRGs in dedifferentiated thyroid cancer (DDTC) and to obtain independent risk factors for dedifferentiation. The IRGs formed a gene signature, whose predictive value was tested by the receiver operating characteristic curve. Correlations between the signature and differentiation-related genes, immune checkpoints, and prognosis were analyzed. Gene set enrichment analyses were performed to identify related signaling pathways. Results Four IRGs (PRKCQ, PLAUR, PSMD2, and BMP7) were found to be repeatedly dysregulated in DDTC, and they formed an IRG-based signature with a satisfactory predictive value for thyroid cancer dedifferentiation. Correlation analyses revealed that immune checkpoints were closely related to the 4 IRGs and the IRG-based signature, which was significantly associated with the histological subtype (P = 0.026), lymph node metastasis (P = 0.001), and BRAFV600E mutation (P Conclusions This study suggests that IRGs participate in the dedifferentiation and immune exhaustion process of thyroid cancer and are potential biomarkers for DDTC.
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- 2020
5. Immune Co-inhibitory Receptors PD-1, CTLA-4, TIM-3, LAG-3, and TIGIT in Medullary Thyroid Cancers: A Large Cohort Study
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Wen-Jun Wei, Cui-Wei Li, Li-Cheng Tan, Xiao Shi, Ning Qu, Tong-Zhen Chen, Yu-Long Wang, Peng-Cheng Yu, Qinghai Ji, Tian Liao, Shishuai Wen, Yu Wang, Rong-Liang Shi, Ben Ma, Yan Zhang, and Zhongwu Lu
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Oncology ,Male ,Endocrinology, Diabetes and Metabolism ,medicine.medical_treatment ,Clinical Biochemistry ,Programmed Cell Death 1 Receptor ,Biochemistry ,Cohort Studies ,Endocrinology ,Medicine ,CTLA-4 Antigen ,Receptors, Immunologic ,Child ,Hepatitis A Virus Cellular Receptor 2 ,Aged, 80 and over ,Tissue microarray ,biology ,Middle Aged ,Prognosis ,Immunohistochemistry ,Lymphocyte Activation Gene 3 Protein ,Disease Progression ,Female ,Antibody ,Adult ,medicine.medical_specialty ,China ,Adolescent ,Context (language use) ,Young Adult ,TIGIT ,Antigen ,Antigens, CD ,PD-L1 ,Internal medicine ,Biomarkers, Tumor ,Humans ,Thyroid Neoplasms ,Aged ,Retrospective Studies ,business.industry ,Biochemistry (medical) ,Immunotherapy ,Immune Checkpoint Proteins ,Survival Analysis ,Carcinoma, Neuroendocrine ,CTLA-4 ,Tissue Array Analysis ,biology.protein ,business - Abstract
ContextProgrammed cell death protein-1 (PD-1), cytotoxic T-lymphocyte antigen 4 (CTLA-4), T-cell immunoglobulin and mucin-domain containing-3 (TIM-3), lymphocyte activation gene-3 (LAG-3), and T-cell immunoglobulin and ITIM domain (TIGIT) are considered major immune co-inhibitory receptors (CIRs) and the most promising immunotherapeutic targets in cancer treatment, but they are largely unexplored in medullary thyroid carcinoma (MTC).ObjectiveWe aimed to provide the first evidence regarding the expression profiles and clinical significance of CIRs in a large cohort of MTC patients.Design and PatientsIn total, 200 MTC patients who received initial surgery in our hospital were included. Immunohistochemistry was performed to evaluate CIR expressions in tissue microarrays (TMAs). Combined with the results of our previous programmed cell death ligand-1 (PD-L1) study, clinicopathologic and prognostic correlations of these proteins were retrospectively analyzed.ResultsTIM-3, PD-1, CTLA-4, LAG-3, and TIGIT positivity was detected in 96 (48.0%), 27 (13.5%), 25 (12.5%), 6 (3.0%), and 6 (3.0%) patients, respectively, in whom TIM-3, PD-1, and CTLA-4 expressions were positively correlated. Log-rank tests and multivariate Cox analyses both indicated that TIM-3, CTLA-4 expression, and PD-1/PD-L1 coexpression were associated with worse structural recurrence-free survival. In addition, among 20 patients who developed advanced disease during follow-up, 12 (60%) showed TIM-3 positivity, among whom 6 cases also had concurrent moderate to strong PD-1, PD-L1, or CTLA-4 expression.ConclusionsUsing the currently largest TMA cohort of this rare cancer, we delineated the CIR expression profiles in MTC, and identified TIM-3, CTLA-4 expression, and PD-1/PD-L1 coexpression as promising biomarkers for tumor recurrence. Furthermore, a subset of advanced MTCs are probably immunogenic, for which single or combined immunotherapy including TIM-3, PD-1, PD-L1, or CTLA-4 blockade may be potential therapeutic approaches in the future.
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- 2020
6. MICROFACIES ANALYSIS AND SEDIMENTARY ENVIRONMENT OF THE SECTION OF TOP MAJIAGOU FORMATION IN NIUMAOLING SCENIC AREA OF BENXI CITY, LIAONING PROVINCE.
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SUN Bao-liang, LIANG Jun-hong, WEN Shou-qin, and CUI Wei-li
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The section of top Majiagou Formation is located in the east of Niumaoling Scenic Area of Benxi National Geopark. The sedimentary environment of the section is restored and its change rules are summarized through the microfacies analysis of carbonate rocks. According to the study of specimens, 14 microfacies types are classified, including 1 tempestite microfacies type, 9 gentle slope microfacies types, 3 standard microfacies types and 1 custom microfacies type. The section can be divided into 3 low-energy upward-shallowing tidal margin cycles from bottom to top: The sedimentary environment of Cycle I is tidal margin or lagoon of inner gentle slope--sandbeach and sand bank--tidal margin of tide gate; The sedimentary environment of Cycle II is from limited or open inner gentle slope to shallow subtidal zone of tidal margin and intertidal-supratidal zone of individual layer; The Cycle III is the most typical, with the sedimentary environment from the middle gentle slope of gray limestone, to tidal margin, then to the tidal margin shallow subtidal zone of yellow carbonate rocks, to the evaporative lagoons of intertidal-supratidal zones, and to the evaporative coast of intertidal-supratidal zones in arid climate. It is inferred that the stained Fe
3+ and clay minerals are of terrigenous origin, and the section point is the tidal margin environment of carbonate rock island (bar). [ABSTRACT FROM AUTHOR]- Published
- 2021
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7. Treating Clinically Node-Negative Insular Thyroid Carcinoma without Prophylactic Central Compartment Neck Dissection Is Associated with Decreased Survival Regardless of T Staging and Administration of Radioactive Iodine Therapy: The First Evidence
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Wei Ping Hu, Ben Ma, Yu Wang, Li Cheng Tan, Qinghai Ji, Cui Wei Li, Xiao Shi, Peng Cheng Yu, Wen Jun Wei, and Yu-Long Wang
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medicine.medical_specialty ,lcsh:RC648-665 ,Article Subject ,Endocrine and Autonomic Systems ,business.industry ,Endocrinology, Diabetes and Metabolism ,medicine.medical_treatment ,Central compartment ,030209 endocrinology & metabolism ,Neck dissection ,Disease ,Gastroenterology ,lcsh:Diseases of the endocrine glands. Clinical endocrinology ,Node negative ,Thyroid carcinoma ,03 medical and health sciences ,0302 clinical medicine ,Endocrinology ,030220 oncology & carcinogenesis ,Internal medicine ,Epidemiology ,medicine ,Radioactive iodine therapy ,business ,Prospective cohort study - Abstract
Forcher and Contributor ID) account on MTS. To register a linked ORCID account, please go to the Account Update page (http://mts.hindawi.com/update/) in our Manuscript Tracking System and after you have logged in click on the ORCID link at the top of the page. This link will take you to the ORCID website where you will be able to create an account for yourself. Once you have done so, your new ORCID will be saved in our Manuscript Tracking System automatically."?> the rare but aggressive insular thyroid carcinoma (ITC), there's no clear evidence to determine whether prophylactic central compartment neck dissection (CCND) is necessary for cN0 disease. This study provides the first evidence that treating cN0 ITC without prophylactic CCND is associated with decreased survival regardless of T staging and administration of RAI therapy. Background. Regarding the rare but aggressive insular thyroid carcinoma (ITC), the value of prophylactic central compartment neck dissection (CCND) for clinically node-negative (cN0) disease is unclear. We aimed to provide the first evidence. Methods. N0 and pN1a ITC patients were identified from the Surveillance, Epidemiology, and End Results database. These patients were divided into thyroid-surgery + CCND group (pN0/pN1a patients confirmed by CCND) and thyroid-surgery group (cN0 patients without CCND). Differences in overall survival (OS) and disease-specific survival (DSS) between the two groups were evaluated. Subgroup analyses were also conducted. Results. Of the overall 112 patients, 44 (39.3%) received CCND. On multivariate analyses, the lobectomy ± isthmusectomy/total-thyroidectomy (Lob/TT) group demonstrated poorer OS and DSS than the Lob/TT + CCND group (P<0.05). When we separately analyzed patients treated by TT, multivariate analyses showed the TT group still revealed compromised OS and DSS than the TT + CCND group (P<0.05). Furthermore, absence of CCND independently predicted decreased OS no matter whether radioactive iodine (RAI) was administered. Similar results were obtained for T3/T4 patients. Moreover, for T1/T2 patients receiving CCND, 0/12 died during the study period, while for T1/T2 patients without CCND, 8/23 (34.8%) died, 5/23 (21.7%) due to ITC. Conclusion. Regardless of T staging and RAI treatment, cN0-ITC patients without CCND had decreased survival compared with pN0/pN1a patients receiving CCND. Therefore, if a cN0 patient is diagnosed with ITC, prophylactic CCND may be considered as a secondary procedure (postoperatively diagnosed) or a primary procedure (preoperatively/intraoperatively diagnosed). Prospective studies are expected to validate the conclusion.
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- 2019
8. A 4 Gene-based Immune Signature Predicts Dedifferentiation and Immune Exhaustion in Thyroid Cancer.
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Cui-Wei Li, Xiao Shi, Ben Ma, Yu-Long Wang, Zhong-Wu Lu, Tian Liao, Yu Wang, Qing-Hai Ji, Wen-Jun Wei, Li, Cui-Wei, Shi, Xiao, Ma, Ben, Wang, Yu-Long, Lu, Zhong-Wu, Liao, Tian, Wang, Yu, Ji, Qing-Hai, and Wei, Wen-Jun
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THYROID cancer ,IMMUNE checkpoint proteins - Abstract
Context: The role of immune-related genes (IRGs) in thyroid cancer dedifferentiation and accompanying immune exhaustion remains largely unexplored.Objective: To construct a significant IRG-based signature indicative of dedifferentiation and immune exhaustion in thyroid cancer.Design and Settings: One exploratory cohort and 2 validation cohorts were used to identify stably dysregulated IRGs in dedifferentiated thyroid cancer (DDTC) and to obtain independent risk factors for dedifferentiation. The IRGs formed a gene signature, whose predictive value was tested by the receiver operating characteristic curve. Correlations between the signature and differentiation-related genes, immune checkpoints, and prognosis were analyzed. Gene set enrichment analyses were performed to identify related signaling pathways.Results: Four IRGs (PRKCQ, PLAUR, PSMD2, and BMP7) were found to be repeatedly dysregulated in DDTC, and they formed an IRG-based signature with a satisfactory predictive value for thyroid cancer dedifferentiation. Correlation analyses revealed that immune checkpoints were closely related to the 4 IRGs and the IRG-based signature, which was significantly associated with the histological subtype (P = 0.026), lymph node metastasis (P = 0.001), and BRAFV600E mutation (P < 0.001). The downregulated expression of PRKCQ shortened the disease-free survival for patients with thyroid cancer. Furthermore, we identified several signaling pathways inherently associated with the IRG-based signature.Conclusions: This study suggests that IRGs participate in the dedifferentiation and immune exhaustion process of thyroid cancer and are potential biomarkers for DDTC. [ABSTRACT FROM AUTHOR]- Published
- 2021
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9. Fabrication of Porous Mullite Ceramics with High Porosity Using Foam-Gelcasting
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Chan Gan Wang, Cui Wei Li, Ya Mei Lin, and Feng Kun Yang
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Materials science ,Fabrication ,Mechanical Engineering ,Mullite ,Raw material ,chemistry.chemical_compound ,Monomer ,Compressive strength ,Thermal conductivity ,chemistry ,Mechanics of Materials ,visual_art ,visual_art.visual_art_medium ,General Materials Science ,Ceramic ,Composite material ,Porosity - Abstract
In this paper, porous mullite ceramics with an apparent porosity up to 81 % were fabricated by foam-gelcasting using mullite powder as raw material with solid loading of 40 vol.%. The monomers content and sitering temperature have obvious effect on the properties of porous mullite ceramics. The apparent porosity of the prepared samples was in the range of 75~82%, compressive strength, was in the range of 3.0~16.02 MPa, and thermal conductivity was between 0.14 and 0.47 W/(m•K). A complex porous microstructure was formed, where large spherical pores contained small cellular pores on their internal walls.
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- 2012
10. Fabrication and Properties of Porous Anorthite⁄Mullite Ceramics
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Cui Wei Li, Feng Kun Yang, Ya Mei Lin, and Chang-An Wang
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Materials science ,Mechanical Engineering ,Composite number ,Mullite ,engineering.material ,Anorthite ,Microstructure ,Compressive strength ,Mechanics of Materials ,Phase (matter) ,visual_art ,engineering ,visual_art.visual_art_medium ,General Materials Science ,Ceramic ,Composite material ,Porosity - Abstract
Porous anorthite/mullite composite ceramics with different mullite content were fabricated by foam-gelcasting, using CaCO3, SiO2, α-Al2O3as raw material for anorthite phase and mullite powder for mullite phase. Effects of mullite powder content on bulk density, porosity, compressive strength and thermal conductivity of the porous composite ceramics were researched. It has been shown that mullite powder content has great effect on microstructure and properties of the porous anorthite⁄mullite composite ceramics. The open porosity of the prepared porous anorthite⁄mullite composite ceramics is in the range of 58.7 %~77.5 %, the compressive strength is between 4.2 and 30.9 MPa, and the thermal conductivity is in the range of 0.18 ~1.47 W⁄(m·K).
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- 2012
11. Preparation and mechanical properties of ZrB2-based ceramics using MoSi2 as sintering aids
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Ming-Fu Wang, Cui-Wei Li, Chang-An Wang, and Ya-Mei Lin
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Zirconium diboride ,Materials science ,Metallurgy ,Sintering ,Grain size ,chemistry.chemical_compound ,Fracture toughness ,chemistry ,Flexural strength ,visual_art ,Vickers hardness test ,visual_art.visual_art_medium ,Relative density ,General Materials Science ,Ceramic - Abstract
ZrB2 (zirconium diboride)-based ceramics reinforced by 15vol.% SiC whiskers with high density were successfully prepared using MoSi2 as sintering aids. The effects of sintering condition and MoSi2 content on densification behavior, phase composition, and mechanical properties of SiCw/ZrB2 composites were studied. Nearly, fully dense materials (relative density >99%) were obtained by hot-pressing (HP) at 1700°C–1800°C in flow argon atmosphere. The grain size of ZrB2 phase in the samples sintered by HP at 1700°C–1800°C were very fine, with mean size below 5 μm. Mechanical properties (such as flexural strength, fracture toughness, and Vickers hardness) of the sintered samples were measured. The sample with 15vol.% MoSi2 addition sintered by HP at 1750°C displayed the best mechanical properties.
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- 2010
12. Hydrogen embrittlement behavior of typical hydrogen-blended natural gas pipeline steel
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Yu-xing LI, Rui ZHANG, Cui-wei LIU, Cai-lin WANG, Hong-chao YANG, Qi-hui HU, Jia-xuan ZHANG, Xiu-sai XU, and Hui-min ZHANG
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pipeline steel ,hydrogen embrittlement ,gas phase in-situ hydrogen charging ,slow strain rate tension ,hydrogen compatibility ,hydrogen-blended natural gas pipelines ,Oils, fats, and waxes ,TP670-699 ,Gas industry ,TP751-762 - Abstract
Currently, it is most economical to transport hydrogen with the existing natural gas pipelines by blending it into the natural gas among the storage and transportation technologies of hydrogen energy, and thus the transportation technology of hydrogen-blended natural gas is widely concerned by research institutes at home and abroad. However, hydrogen embrittlement may be caused to the pipeline steel due to the contact of hydrogen with base metal during hydrogen transportation, which further leads to the deterioration of mechanical properties of pipeline steel, threatening the safe operation of pipelines. Therefore, the change law of the mechanical properties of X52 and X80 steel typically used for natural gas pipelines under the actual hydrogen-blended conditions was studied through in-situ tensile testing and fracture morphology analysis under the environment of high-pressure gas-phase hydrogen. Meanwhile, the influence of hydrogen partial pressure on yield strength, tensile strength, percentage reduction of area and hydrogen embrittlement index of material was analyzed. The study results show that, the ductility of X52 and X80 steel is declined and the hydrogen embrittlement is intensified with the increasing of hydrogen partial pressure. Compared with X80 steel, X52 steel is more suitable for the hydrogen-blended natural gas transportation. Generally, the study results could provide reference to the material selection and safe operation of hydrogen-blended natural gas pipelines in the future.
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- 2022
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13. Synthesis and Properties of Ternary Carbide Ti3AlC2 Ceramics
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Li Qiang Gao, Zhi Li Zhang, Hong Xiang Zhai, Zhen Ying Huang, Yang Zhou, Shi Bo Li, Ming Xing Ai, and Cui Wei Li
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Materials science ,Mechanical Engineering ,Metallurgy ,Sintering ,Microstructure ,Carbide ,Flexural strength ,Mechanics of Materials ,visual_art ,visual_art.visual_art_medium ,General Materials Science ,Ceramic ,Graphite ,Crystallite ,Ternary operation - Abstract
Polycrystalline bulk samples of ternary carbide Ti3AlC2 ceramics were fabricated by reactively hot-pressing a mixture of Ti, Al, and graphite powders with and without Sn additive. The effects of sintering temperature, time and addition of Sn on the purity, mechanical properties and microstructure of Ti3AlC2 were investigated. The result showed that the TiC content was strongly influenced by sintering temperature for the Ti3AlC2 samples without Sn additive, and the most suitable sintering temperature to create the lowest TiC content was 1400°C. The addition of Sn additive led to a distinct decrease in TiC content. The flexural strength of the testing materials had close relation with the TiC content and sintering time. A certain content of TiC second phase and longer sintering time were helpful to improving the flexural strength. The sample sintered at 1400°C for 2 h possessed the highest flexural strength.
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- 2007
14. Tribo-Chemical Reaction in Bulk Ti3SiC2 under Sliding Friction
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Zhouyang, Yi Fan Wang, Cui Wei Li, Zhen Ying Huang, Zhi Li Zhang, and Hong Xiang Zhai
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Reaction mechanism ,Materials science ,Carbon steel ,Scanning electron microscope ,Mechanical Engineering ,engineering.material ,Chemical reaction ,Mechanics of Materials ,Impurity ,Phase (matter) ,engineering ,General Materials Science ,Surface layer ,Composite material ,Spectroscopy - Abstract
The Ti3SiC2 samples with a second phase TiC, prepared by hot-pressing progress route, were rubbed against low carbon steel disk with a sliding speed of 20 m/s under normal pressure 0.8 Mpa in atmosphere on a block-on-disk type friction tester. The morphology was observed by scanning electron microscope (SEM) and meanwhile the composition was checked by energy dispersion spectroscopy (EDS). X-ray diffraction (XRD) patterns show some impurity phases containing Ti, Si and Fe oxides in the samples. The possible tribo-chemical reaction mechanism on surface layer of Ti3SiC2 was suggested.
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- 2007
15. Influence of Loading Conditions on Cyclic Compressive Fatigue Behavior of an Al2O3 Matrix Composite
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Cui Wei Li, Ming Xing Ai, Yang Zhou, Zhen Ying Huang, Zhi Li Zhang, Shi Bo Li, and Hong Xiang Zhai
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Materials science ,Mechanical Engineering ,Composite number ,Nucleation ,Hot pressing ,Crack closure ,Compressive strength ,Mechanics of Materials ,mental disorders ,Ultimate tensile strength ,General Materials Science ,Compression (geology) ,Composite material ,Stress concentration - Abstract
An Al2O3 matrix composites, i.e. partially stabilized zirconia toughening alumina (ZTA) reinforced by SiC particle (ZTA-SiCP), was prepared by hot pressing (HP). Fatigue behavior of ZTA-SiCP under cyclic compressive loads was investigated on different loading conditions. The application of cyclic compressive loads to a notched specimen led to a stable crack growth along the notch plane in a direction normal to the far-field compressive axis. Irreversible damages in the main form of microcrack were induced at the stress concentration zone during compression loading, and it led to high residual tensile stresses ahead of the notch root upon unloading. Nucleation and growth of a model I fatigue crack were caused by the residual tensile stresses at the notch root. Along with propagation of the fatigue crack, a gradual decrease in crack growth rate was shown due to the crack closure caused by accumulating of debris particles within the wake of growing crack, and thus led to the crack arrested at last. The fatigue crack length was investigated as a function of notch length, the maximum compressive stress, stress range and load frequency.
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- 2007
16. Mechanical Properties and Oxidation Behavior of Si3N4/BN Laminated Ceramics
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Cui Wei Li, Yong Huang, and Chang-An Wang
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Mechanical property ,Materials science ,Mechanical Engineering ,Nitride ,Silicate ,chemistry.chemical_compound ,chemistry ,Silicon nitride ,Mechanics of Materials ,Boron nitride ,visual_art ,Silicon carbide ,visual_art.visual_art_medium ,General Materials Science ,Ceramic ,Composite material - Abstract
Laminated ceramics with high mechanical properties were fabricated in the Si3N4/BN system. The mechanical properties at elevated temperatures were tested, and the oxidation behavior during tested procedure was studied at the same time. The flexure strength of the Si3N4/BN laminated ceramics changed a little below 1000°C. The displacement-load curves appeared non-linear characteristic even at high temperature. During testing procedure at high temperature, oxidation behavior of silicon nitride and silicon carbide happened, and no oxidation product of boron nitride was found. The silicon nitride layers were oxidized to form a protective silicate scale, which prevented oxidation of the boron nitride interlayers. The stability of boron nitride was beneficial to the boron nitride interlayer to partition the silicon nitride matrix layers at high temperature.
- Published
- 2007
17. Influence of Toughening Method on Microstructures and Mechanical Properties of Alumina-Matrix Composites
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Cui Wei Li, Yang Zhou, Zhen Ying Huang, Ming Xing Ai, Zhi Li Zhang, Hong Xiang Zhai, and Shi Bo Li
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Toughness ,Materials science ,Mechanical Engineering ,Composite number ,Condensed Matter Physics ,Microstructure ,Toughening ,Mechanics of Materials ,Whisker ,visual_art ,visual_art.visual_art_medium ,Particle ,General Materials Science ,Cubic zirconia ,Ceramic ,Composite material - Abstract
Various toughening methods, i.e. partially stabilized zirconia transformation toughening, transformation- SiC whisker reinforcing and transformation-SiC particle reinforcing were used to improve the mechanical properties of alumina ceramic. Influence of various toughening methods on microstructure and mechanical properties of the alumina-matrix composites were studied. On the basis of transformation toughening, by which the strength and toughness of Al2O3 ceramic improved simultaneously, the addition of SiC whisker substantially enhanced the toughness, whereas the addition of SiC particle increased both toughness and strength to a certain degree. Mechanical properties of the testing materials were closely related with their morphologies of fracture surfaces. Toughening mechanisms of the composites were also studied. In the transformation-whisker reinforced composite or the transformation-particle reinforced composite, the two toughening methods affected with each other and produced a cooperative toughening effect.
- Published
- 2005
18. Flexure Creep Behaviors of Si3N4/BN Laminated Ceramic Composites Produced by Rolling
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Cui Wei Li, Qing Feng Zan, Chang-An Wang, Yong Huang, and Shi Ke Zhao
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Materials science ,Creep ,Mechanics of Materials ,Mechanical Engineering ,visual_art ,visual_art.visual_art_medium ,General Materials Science ,Ceramic ,Composite material - Published
- 2003
19. Preparation of Al2O3/TiSiC2 Multilayer Materials by In-Situ Synthesis
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Chang-An Wang, Yong Huang, Cui Wei Li, Qing Feng Zan, and Shu Qin Li
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In situ ,Materials science ,Mechanics of Materials ,Mechanical Engineering ,General Materials Science ,Nanotechnology - Published
- 2002
20. Effects of Additive to BN Interlayers on Microstructure and Properties of Laminated Si3N4/BN Ceramic
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Qing Feng Zan, Shu Qin Li, Yong Huang, Chang-An Wang, and Cui Wei Li
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Materials science ,Mechanics of Materials ,Mechanical Engineering ,visual_art ,visual_art.visual_art_medium ,General Materials Science ,Ceramic ,Composite material ,Microstructure - Published
- 2002
21. Synthesis of Ti3Si0.4Al0.8C1.8 Solid Solution
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Cui Wei Li, Yang Zhou, Shi Bo Li, Zhi Li Zhang, and Hong Xiang Zhai
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Diffraction ,Argon ,Materials science ,Scanning electron microscope ,Mechanical Engineering ,Analytical chemistry ,chemistry.chemical_element ,Crystallography ,chemistry ,Mechanics of Materials ,Molar ratio ,General Materials Science ,Single phase ,Solid solution - Abstract
In this study, free Ti/Si/Al/C powder mixtures with molar ratio of 3:0.4:0.8:1.8 were heated in Argon with various schedules, in order to reveal the possibility for the synthesis of Ti3Si0.4Al0.8C1.8 solid solution powder. X-ray diffraction (XRD) was used for the evaluation of phase identities of the powder after different treatments. Scanning electron microscopy (SEM) was used to observe the morphology of the Ti3Si0.4Al0.8C1.8 solid solution. XRD results showed that predominantly single phase samples of Ti3Si0.4Al0.8C1.8 was prepared after heating at 1400oC for 5 min in Argon and the lattice parameters of Ti3Si0.4Al0.8C1.8 lay between those of Ti3SiC2 and Ti3AlC2.
- Published
- 2008
22. Study of Ti3Si1.2-xAlxC2 (x = 0~1.2) Solid Solution via X-Ray Diffraction
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Cui Wei Li, Yang Zhou, Yan Ding, Shi Bo Li, Zhi Li Zhang, and Hong Xiang Zhai
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Diffraction ,Crystallography ,Range (particle radiation) ,Materials science ,Lattice constant ,Mechanics of Materials ,Mechanical Engineering ,Cell volume ,X-ray crystallography ,Analytical chemistry ,General Materials Science ,Solid solution - Abstract
A search for Ti3Si1.2-xAlxC2 (x=0~1.2) solid solution was undertaken using precise X-ray diffraction measurements. The samples covering the whole concentration range were studied. Except very ends of the concentration range, the samples contained two phases, identified as Ti3Si1.2-xAlxC2 solid solution and TiC respectively. Lattice parameter, a increased, c increased, c/a increased, and cell volume increased with the increasing of Al concentration.
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- 2007
23. Synthesis and Properties of Ternary Carbide Ti3AlC2 Ceramics
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Yang Zhou, Hong Xiang Zhai, Li Qiang Gao, Ming Xing Ai, Zhen Ying Huang, Shi Bo Li, Zhi Li Zhang, and Cui Wei Li
- Published
- 2007
24. Tribo-Chemical Reaction in Bulk Ti3SiC2 under Sliding Friction
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Zhi Li Zhang, Hong Xiang Zhai, Zhen Ying Huang, Cui Wei Li, Yi Fan Wang, and null Zhouyang
- Published
- 2007
25. Influence of Loading Conditions on Cyclic Compressive Fatigue Behavior of an Al2O3 Matrix Composite
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Yang Zhou, Hong Xiang Zhai, Ming Xing Ai, Zhen Ying Huang, Zhi Li Zhang, Shi Bo Li, and Cui Wei Li
- Published
- 2007
26. Influence of Toughening Method on Microstructures and Mechanical Properties of Alumina-Matrix Composites
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Yang Zhou, Hong Xiang Zhai, Zhen Ying Huang, Ming Xing Ai, Zhi Li Zhang, Shi Bo Li, and Cui Wei Li
- Published
- 2005
27. WSN Image Watermarking Algorithm Based on Multi-Wavelet
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Li, Xin, primary, Jiang, Yu, additional, Song, Jian Jun, additional, and Cui, Wei Li, additional
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- 2010
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28. Research on Space Location System Based on WSN
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Li, Xin, primary, Jiang, Yu, additional, Song, Jian Jun, additional, and Cui, Wei Li, additional
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- 2010
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29. Opening of Tartrate Acetals Using Dialkylboron Bromide: Evidence for Stereoselectivity Downstream from Ring Fission
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Guindon, Yvan, primary, Ogilvie, William W., additional, Bordeleau, Josée, additional, Cui, Wei Li, additional, Durkin, Kathy, additional, Gorys, Vida, additional, Juteau, Hélène, additional, Lemieux, René, additional, Liotta, Dennis, additional, Simoneau, Bruno, additional, and Yoakim, Christiane, additional
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- 2002
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30. Sex-specific Prevalence and Influencing Factors of Hypertension among Nurses: a Propensity Score Matching-based Study
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HAO Xiaoran, ZHAO Bin, CUI Wei, LI Jing, LIU Jie, FENG Di, ZHANG Luqi, LI Yun, LI Xian, DING Junqin, LI Laiyou, LI Lanfeng, YIN Xiaohua, LI Yuzhuo, HUANG Xianghe
- Subjects
hypertension ,nursing staff ,sex distribution ,hebei province ,root cause analysis ,propensity score ,Medicine - Abstract
Background Long-term high level of mental tension induced by nursing work may be associated with increased blood pressure in nurses. The factors influencing hypertension may differ by sex, since there are sex-specific differences in the regulation of blood pressure in molecules, cells and tissues. So exploring influencing factors for hypertension in male and female nurses is significant for formulating targeted prevention and control strategies. Objective To examine the prevalence and influencing factors of hypertension among male and female nurses in Hebei Province, providing a basis for developing sex-based hypertension prevention and control measures for nurses. Methods A census survey method was used. The prevalence and influencing factors of hypertension were investigated among 128 009 nurses in all hospitals in 11 cities of Hebei Province from November 2016 to July 2018. The recognized factors influencing hypertension were matched between male and female nurses by propensity score matching. Based on the matched data, multivariate Logistic regression was used to explore the factors influencing hypertension among male and female nurses. Results The prevalence of hypertension was higher in male nurses than in female nurses〔20.36% (1 115/5 476) vs 6.26% (669/122 533) , P25-35 years old (OR=2.182) , >35-45 years old (OR=3.560) , >45-55 years old (OR=7.406) , >55-65 years old (OR=13.339) 〕, BMI〔24.0-0-5 years (OR=3.399) , >5-10 years (OR=4.451) 〕, family history of hypertension (OR=1.225) were influencing factors of hypertension for male nurses (P25-35 years old (OR=1.382) , >35-45 years old (OR=4.125) , >45-55 years old (OR=6.510) , >55-65 years old (OR=5.616) 〕, BMI〔24.0-0-5 years (OR=2.863) , >5-10 years (OR=3.713) 〕, years of diabetes〔>0-5 years (OR=3.126) , >5-10 years (OR=2.947) , >10 years (OR=9.743) 〕, family history of hypertension (OR=1.243) , menstrual condition〔irregular (OR=1.358) , menopause (OR=1.689) 〕, pregnancy hypertension〔no (OR=0.486) , no history of pregnancy (OR=0.507) 〕were influencing factors of hypertension for female nurses (P
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- 2023
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31. The origin of driving force for the formation of Sn whiskers at room temperature.
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Shi-Bo Li, Guo-Ping Bei, Hong-Xiang Zhai, Zhi-Li Zhang, Yang Zhou, and Cui-Wei Li
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METALLIC whiskers ,TIN ,METALLURGY ,AGGLOMERATION (Materials) ,OXIDATION ,POLYHEDRA - Abstract
Sn whiskers can form at room temperature on the agglomerated flakes produced by mechanical alloying (MA) of Ti, Sn, and C powders, whether the flakes are stored in air or water. The Sn whiskers forming in air are tens of micrometers to several centimeters in length and 0.5 to ~10 µm in diameter. Whereas a large amount of Sn polyhedra forms on the flakes that are stored in water, a small amount of Sn whiskers forms on the polyhedra. The driving force for Sn whisker formation is the compressive stress induced by mechanical alloying (MA) and oxidation. The mechanism about the spontaneous growth of metal whiskers is discussed. [ABSTRACT FROM AUTHOR]
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- 2007
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32. [Substitution of antelope horn in Danqi Piantan capsule with artificial bezoar in vitro].
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Wang JB, Li Z, Chen T, Zhang YJ, Cui WL, and Li J
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- Animals, Antelopes, Brain-Derived Neurotrophic Factor genetics, Brain-Derived Neurotrophic Factor metabolism, Cattle, Cells, Cultured, Endothelial Cells drug effects, Endothelial Cells metabolism, Male, Medicine, Chinese Traditional, Nerve Growth Factor genetics, Nerve Growth Factor metabolism, Neural Stem Cells drug effects, Neural Stem Cells metabolism, Rats, Rats, Sprague-Dawley, Vascular Endothelial Growth Factor Receptor-2 genetics, Vascular Endothelial Growth Factor Receptor-2 metabolism, Drug Substitution, Gallstones chemistry, Horns chemistry
- Abstract
The in vitro cell culture experiment was conducted to study the effect of Danqi Piantan capsule (DPC) and DPC dislodge the antelope horn with artificial bezoar double (DPCBD) on nerve regeneration and blood vessel regeneration and preliminarily investigate the possibility of substituting antelope horn in DPC with artificial bezoar. In this experiment, rats were randomly divided into 5 groups: the blank serum control group, the model group, DPC groups (0.306 g x kg(-1) x d(-1), the same below), DPC remove of antelope horn (DPCRA) groups and DPCBD groups. Brain microvascular endothelial cells cultured in vitro (BMEC), astrocytes and neural stem cells (NSC) were co-cultured to simulate neurovascular unit, label neurons with microtubule associated protein III (β-tubulin III) antibody and lable astrocytes with glial fibrillary acidicprotein (GFAP). ELISA was used for the detection of the content of BMEC lactate dehydrogenase instrument method (LDH), the inverted phase contrastmicroscope was adopted to observe the formation of BMEC tube like structure, the number of leukocytes and leukocytes adherent to BMEC were counted under the microscope, the expression levels of β-tubulin III and the ratio of GFAP positive cells was detected with inimmunofluorescence, and RT-PCR method was used to detect NGF, BDNF, VEGF and VEGFr-2 mRNA. According to the result, compared with the model group, both DPC and DPCBD can reduce LDH leakage, promote the formation of BMEC tube like structure, inhibit leukocytes and their adhesion to BMEC, increase the β-tubulin III positive cell differentiation proportion (P < 0. 01), reduce the proportion of GFAP positive cells (P < 0.01), increase the expressions of co-cultured NGF, VEGF, BDNF and VEGFr-2 mRNA to a certain extent, with the most significant difference on NGF and VEGF mRNA expressions (P < 0.05) and the same efficacy in both groups. DPCRA groups showed less impact on all indexes than that of DPCBD and DPC groups. The same efficacy of DPCBD and DPC on nerve regeneration and angiogenesis suggested that antelope horn in DPC can be substituted by artificial bezoar.
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- 2015
33. [Preliminary study on substitution of Antelope Horn in Danqi Piantan capsule with artificial bezoar].
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Wang JB, Chen T, Li Z, Zhang YJ, Cui WL, and Li J
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- Animals, Biological Factors chemical synthesis, Biological Factors chemistry, Brain drug effects, Brain metabolism, Caspase 3 genetics, Caspase 3 metabolism, Drug Compounding, Humans, Infarction, Middle Cerebral Artery genetics, Infarction, Middle Cerebral Artery metabolism, Intercellular Adhesion Molecule-1 genetics, Intercellular Adhesion Molecule-1 metabolism, Interleukin-1beta genetics, Interleukin-1beta metabolism, Male, Rats, Rats, Sprague-Dawley, Superoxide Dismutase blood, Superoxide Dismutase genetics, Tumor Necrosis Factor-alpha genetics, Tumor Necrosis Factor-alpha metabolism, Antelopes, Bile chemistry, Biological Factors administration & dosage, Horns chemistry, Infarction, Middle Cerebral Artery drug therapy, Medicine, Chinese Traditional
- Abstract
To study the protective effect of Danqi Piantan capsule ( DPC) and its antelope horn substitution (DPCAS) on the cerebral ischemia, in order to preliminary study the possibility of replacing antelope horn with artificial bezoar. In this study, the left middle cerebral artery occlusion (MCAO) was adopted. Totally 150 SD rats were randomly divided into 5 groups: the sham operation group, the model group, the Danqi Piantan capsule (DPC) group (0.246 g x kg(-1) x d(-1)), the Danqi Piantan capsule without antelope horn (DPCRA) group (0.246 g x kg(-1) x d(-1)), the Danqi Piantan capsule without antelope horn and with double artificial bezoar (DPCDB) group (0.246 g x kg(-1) x d(-1)). The MCAO model was prepared 1 h later after the administration on the 5th day. At 24 h after the operation, the inner canthus blood was collected to determine the serum superoxide dismutase (SOD) activity and the endothelin (ET) content. At 72 h after the operation, the cerebral infarct size and the cerebral index were determined by TTC-staining. The fluorescent quantitative PCR method was used to detect brain Bcl-2, Caspase-3, IL-1β, P-selectin, E-selectin, ICAM-1 mRNA expressions. The mmunohistochemical method was used to detect ICAM-1, IL-1β, TNF-α, IL-6 expressions in ischemic penumbra. According to the results, compared with the model group, DPCDB and DPC groups showed almost consistent results, indicating both of the two group can significantly improved cerebral infarction index and cerebral index (P < 0.05), increase the serum SOD activity (P < 0.05), decrease the serum ET level and Caspase-3 expression, IL-1β, P-selectin, E-selectin, ICAM-1 mRNA expressions in brain tissues (P < 0.05) and expressions of ICAM-1, IL-1,6, TNF-α, IL-6 positive cells in ischemic penumbra (P < 0.05) and increase the Bcl-2 expression (P < 0.05). The DPCRA group showed much lower impacts on indexes than DPCDB and DPC groups. This suggests that DPCDB and DPC reveal similar efficacies and antelope horn in Danqi Piantan capsule can be substitutes by artificial bezoar.
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- 2015
34. Oxidative stress induces gastric submucosal arteriolar dysfunction in the elderly.
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Liu L, Liu Y, Cui J, Liu H, Liu YB, Qiao WL, Sun H, and Yan CD
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- Adult, Age Factors, Aged, Aged, 80 and over, Aging pathology, Arterioles metabolism, Arterioles pathology, Arterioles physiopathology, Glutathione Peroxidase metabolism, Humans, Hydrogen Peroxide metabolism, Male, Malondialdehyde metabolism, Middle Aged, Superoxide Dismutase metabolism, Vasodilator Agents pharmacology, Xanthine Oxidase metabolism, Aging metabolism, Gastric Mucosa blood supply, Oxidative Stress, Vasodilation drug effects
- Abstract
Aim: To evaluate human gastric submucosal vascular dysfunction and its mechanism during the aging process., Methods: Twenty male patients undergoing subtotal gastrectomy were enrolled in this study. Young and elderly patient groups aged 25-40 years and 60-85 years, respectively, were included. Inclusion criteria were: no clinical evidence of cardiovascular, renal or diabetic diseases. Conventional clinical examinations were carried out. After surgery, gastric submucosal arteries were immediately dissected free of fat and connective tissue. Vascular responses to acetylcholine (ACh) and sodium nitroprusside (SNP) were measured by isolated vascular perfusion. Morphological changes in the gastric mucosal vessels were observed by hematoxylin and eosin (HE) staining and Verhoeff van Gieson (EVG) staining. The expression of xanthine oxidase (XO) and manganese-superoxide dismutase (Mn-SOD) was assessed by Western blotting analysis. The malondialdehyde (MDA) and hydrogen peroxide (H₂O₂) content and the activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) were determined according to commercial kits., Results: The overall structure of vessel walls was shown by HE and EVG staining, respectively. Disruption of the internal elastic lamina or neointimal layers was not observed in vessels from young or elderly patients; however, cell layer number in the vessel wall increased significantly in the elderly group. Compared with submucosal arteries in young patients, the amount of vascular collagen fibers, lumen diameter and media cross-sectional area were significantly increased in elderly patients. Ach- and SNP-induced vasodilatation in elderly arterioles was significantly decreased compared with that of gastric submucosal arterioles from young patients. Compared with the young group, the expression of XO and the contents of MDA and H₂O₂ in gastric submucosal arterioles were increased in the elderly group. In addition, the expression of Mn-SOD and the activities of SOD and GSH-Px in the elderly group decreased significantly compared with those in the young group., Conclusion: Gastric vascular dysfunction and senescence may be associated with increased oxidative stress and decreased antioxidative defense in the aging process.
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- 2013
- Full Text
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35. [Analysis of anti-microbial resistance of Escherichia coli that caused infection in urogenital system].
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Cui WL, Xu DX, Li WL, and Wang LX
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- Anti-Bacterial Agents pharmacology, Cephalosporins pharmacology, Humans, Microbial Sensitivity Tests, Quinolones pharmacology, beta-Lactams pharmacology, Drug Resistance, Bacterial, Escherichia coli drug effects, Escherichia coli Infections microbiology, Urinary Tract Infections microbiology, beta-Lactam Resistance
- Abstract
Objective: To study the anti-microbial resistance of Escherichia coli (E.coli) that caused infection in urogenital system., Method: Anti-microbial susceptibility tests for 148 strains of E.coli were conducted by disc diffusion technique., Results: In 28 commonly used antibiotics, the resistance rates of E. coli to beta-lactam and quinolones were high (73.6%-86.4%). High resistance rates to the first- and the second-generation cephalosporin (cefradime, cephazolin and cefaclor) were also observed (44%). Resistance rate to ceftazidime is the lowest (10.1%) in the third-generation cephalosporin. The resistance rates of E. coli to piperacillin, pefoperazone and ampicillin were 84.5%, 44.6% and 83.0% respectively. Combined antibiotic and beta-lactam inhibitor gave lower resistance rates than antibiotic alone (piperacillin/tazobactam, cefoporazone/sulbactam and ampicillin/sulbactam were 4.1%, 10.8% and 52.0% respectively, P<0.01). Of 148 E. coli isolates, 38 strains were capable of yielding extended-spectrum beta-lactamases (ESBLs) (25.7%), 110 strains were not able to produce ESBLs (74.3%) and the resistance rates of isolates with ESBLs to 28 antibiotics were significantly lower than those of isolates without ESBLs., Conclusion: Antibiotic/beta-lactam inhibitor and nitrofurantoin are effective for urogenital infections caused by E. coli.
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- 2004
36. Opening of tartrate acetals using dialkylboron bromide: evidence for stereoselectivity downstream from ring fission.
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Guindon Y, Ogilvie WW, Bordeleau J, Cui WL, Durkin K, Gorys V, Juteau H, Lemieux R, Liotta D, Simoneau B, and Yoakim C
- Abstract
Johnson-type acetals derived from dimethyl tartrate give, after opening with Me(2)BBr and cuprate displacement, secondary alcohols with high diastereoselectivity (>30:1). The mechanism proposed for the induction of diastereoselectivity is downstream from the ring fission. It implies a direct participation of the Lewis acid as a source of nucleophile and the stereospecific transformation of the resulting bromo acetal through an invertive and temperature-dependent process. The acetals are prepared by reaction of the desired aldehyde with dimethyl tartrate. Removal of the auxiliary is accomplished through SmI(2) reduction or by an addition-elimination protocol using methoxide.
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- 2003
- Full Text
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