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Search Results: 1 - 10 of 120905 matches for " Xiaoping Wang "
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Nonexistence of Homoclinic Solutions for a Class of Discrete Hamiltonian Systems
Xiaoping Wang
Abstract and Applied Analysis , 2013, DOI: 10.1155/2013/398681
Abstract:
Ceramic coating electric-deposited by high-energy pulse
Weiping Yu,Xiaoping Wang
Chinese Science Bulletin , 1999, DOI: 10.1007/BF02885927
Abstract: A novel method to prepare ceramic coatings has been developed by making use of plasma energy produced from the pulsed discharge between electric conductor and aqueous electrolyte. A ZrO2-8%Y2O3, coating was obtained by this method, which had excellent adhesion with substrate, smooth surface and good resistance to high temperature oxidation.
Expression and significance of PTEN and nm23-H1 in the metastasis of non-small cell lung cancer
Zhijian JIANG,Xiaoping WANG
Chinese Journal of Lung Cancer , 2008,
Abstract: Background and objective It has been proven that PTEN and nm23-H1 genes were the tumor metastasis suppressor genes. Up to now, most of studies are aim at basic research. The aim of this study is to explore the level of expression of PTEN and nm23-H1 protein in non-small cell lung cancer and their relationship to the clinical significance of non-small cell lung cancer. Methods An immunohistochemical method was used to detect the expression of PTEN and nm23-H1 protein in 60 cases of non-small cell lung cancer. Results In the groups with and without lymph nodes metastasis, the positive rates of PTEN protein expression were 41.94% and 79.31% respectively. The difference between them was significant (P <0.01). The rates of positive expression of nm23-H1 protein were 45.16% and 82.76% respectively. The difference between them also was significant (P <0.01). The expression of PTEN was relatively consistent with that of nm23-H1 (Kappa =0.436 6, Z =3.390 5, P <0.01). Conclusion The expressions of PTEN and nm23-H1 inNSCLC were closely related to lymph nodes metastasis. Combining detection of these two proteins might be more helpfulfor evaluating lymph nodes metastasis and predicting the prognosis.
Uniformly stable rectangular elements for fourth order elliptic singular perturbation problems
Li Wang,Xiaoping Xie
Mathematics , 2011,
Abstract: This paper analyzes rectangular finite element methods for fourth order elliptic singular perturbation problems. We show that the non-$C^0$ rectangular Morley element is uniformly convergent in the energy norm with respect to the perturbation parameter. We also propose a $C^0$ extended high order rectangular Morley element and prove the uniform convergence. Finally, we do some numerical experiments to confirm the theoretical results.
Nano-Ferric Oxide Promotes Watermelon Growth  [PDF]
Meng Wang, Xiaoping Liu, Jing Hu, Junli Li, Jin Huang
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2015, DOI: 10.4236/jbnb.2015.63016
Abstract: With the rapid growing of nanotechnology, the effects of nanomaterials released into the environment on plants have drawn more and more attention. Iron is an element essential for plant growth and development. Iron is involved in chlorophyll formation; iron deficiency will cause a plant disorder known as chlorosis. However, whether iron in nano-ferric oxide can be absorbed by plants were rarely concerned. Nano-ferric oxide might promote the growth and development of plants in a suitable concentration. An experiment was designed to evaluate whether nano-ferric oxide can be used to treat chlorosis and the physiological changes of plants in nano-ferric oxide environment. Watermelon was chosen as the experimental plant. Seedlings of watermelon plants were grown in full nutrient solution without iron for 2 weeks until the leaves got yellow. Then the seedlings were treated with different concentrations of nano-ferric oxide (0, 20, 50, 100 mg/L) and 50 mmol/L of EDTA-Fe(II) for a month. The control group seedlings were still grown in full nutrient solution without any iron. Indicators such as activity of antioxidase like superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) and content of malondialdehyde (MDA) and soluble protein were studied to measure the physiological effects nano-ferric oxide might have on watermelon. It was observed that the leaves reverted green. Experimental data showed that watermelon absorbed iron from nano-ferric oxide, and nano-ferric oxide promoted watermelon growth in some ways in a suitable concentration.
An Empirical Study on the Relationship between Self-Control and Employees’ Initiative Behavior: The Intermediary Role of Emotion Burnout  [PDF]
Yaozhong Liu, Xiaoping Wang, Kai Dou, Bao Zhang
Open Journal of Business and Management (OJBM) , 2015, DOI: 10.4236/ojbm.2015.32021
Abstract: This paper establishes the relationship model between trait self-control and employees’ initiative behavior, using emotion burnout as an intermediary variable, and analyzes the modulation effect of occupation types on it. This paper explores the interactive effects and influence mechanism through the empirical analysis of 189 samples. The results show that the emotion burnout has a partial mediating effect on the relationship between trait self-control and employees’ initiative behavior; that is the emotion burnout has a negative effect on employee’ initiative behavior. Besides, we also find out that the occupation types have a regulatory effect on the relationship between emotion burnout and employees’ initiative behavior.
Clinical Application and Exploration on Steps Progressively Corrections and Gradual Shortening Combined with Total Spinal Osteotomy for Angular Kyphosis—Basic Research and Clinical Application  [PDF]
Ming Lu, Xiaoping Wang, Dongyun Ren, Huasong Ma
Surgical Science (SS) , 2016, DOI: 10.4236/ss.2016.71005
Abstract: Introduction: This study is designed to explore the biomechanical principles of posterior bilateral pedicle screw on steps progressively and tight closure on every step for severe angular kyphosis and the indication conditions and clinical pathways of above new technique. Materials and Methods: A total of 90 patients have severe angular kyphosis, 37 males and 53 females, with an average age of 47 years. All patients were treated with posterior bilateral pedicle screw and step tight closure for gradual shortening and orthopedic technology. Results: Average intraoperative blood loss was 2089 ml. Average operation time was 326 minutes. Kyphotic angle changed from 90.1° averagely preoperatively to 41.6° averagely postoperatively with an improvement rate of 65%. The distance from C7 plumb line to posterior upper edge of the S1 vertebral body was averagely 5.2 mm postoperatively, with a correction rate of 73%. Neurological complications occurred in 2 cases, accounting for 6%. Non-neurological complications occurred in 2 cases, accounting for 6%. Anatomical parameters were significantly improved postoperatively (P < 0.05). All patients were averagely followed up for 28 months. Segments undergoing osteotomy achieved bone fusion, without loss of orthopedic angle. Conclusions: The orthopedic technology of bilateral pedicle screw and step tight closure designed by human physiology and biomechanical principles can protect spinal cord cells from injury to the utmost. To choose an appropriate osteotomy plane during pre-surgical planning can make the repair results closer to the normal function of the spine. Intraoperative nerve root protection, full release and bone graft fusion are effective safeguards to ensure kyphosis correction and to avoid spine lateral offset.
Correlation between Clinicopathology and Expression of Heat Shock Protein 72 and Glycoprotein 96 in Human Esophageal Squamous Cell Carcinoma
Xiaoping Wang,Qiaoxia Wang,Huanping Lin
Clinical and Developmental Immunology , 2010, DOI: 10.1155/2010/212537
Abstract: Heat shock protein 72 (HSP72) and glycoprotein 96 (gp96) are highly expressed in cancer tissues. Recent studies indicate the possible roles of HSP72 and gp96 in the development and progression of gastrointestinal carcinomas but detailed information is still ambiguous. We investigated the correlation between clinicopathology and expression of HSP72 and gp96 in human esophageal squamous cell carcinoma. The expression of HSP72 and gp96 was studied in 120 human esophageal squamous cell carcinomas with or without metastasis as well as in mucous membrane adjacent to cancers by way of immunohistochemistry. HSP72 immunoreactivities were detected in 112 of 120 primary tumors (93.3%) and in 30 of 120 mucous membranes adjacent to cancers (25.0%). Gp96 detected in esophageal squamous cell carcinoma and inmucous membrane adjacent to cancer was 85.0% and 20.0%, respectively. Both HSP72 and gp96 stained in cytoplasm. HSP72 and gp96 expression in esophageal squamous cell carcinomas withmetastasis was significantly higher than those with nonmetastasis (<.05). The results indicate that there exists a significant correlation between the expression of HSP72 and gp96 and the progression of esophageal squamous cell carcinomas. HSP72 and gp96 expression were significantly associated with the presence of tumor infiltration, lymph node, and remote metastasis.
Correlation between Clinicopathology and Expression of Heat Shock Protein 72 and Glycoprotein 96 in Human Esophageal Squamous Cell Carcinoma
Xiaoping Wang,Qiaoxia Wang,Huanping Lin
Journal of Immunology Research , 2010, DOI: 10.1155/2010/212537
Abstract: Heat shock protein 72 (HSP72) and glycoprotein 96 (gp96) are highly expressed in cancer tissues. Recent studies indicate the possible roles of HSP72 and gp96 in the development and progression of gastrointestinal carcinomas but detailed information is still ambiguous. We investigated the correlation between clinicopathology and expression of HSP72 and gp96 in human esophageal squamous cell carcinoma. The expression of HSP72 and gp96 was studied in 120 human esophageal squamous cell carcinomas with or without metastasis as well as in mucous membrane adjacent to cancers by way of immunohistochemistry. HSP72 immunoreactivities were detected in 112 of 120 primary tumors (93.3%) and in 30 of 120 mucous membranes adjacent to cancers (25.0%). Gp96 detected in esophageal squamous cell carcinoma and inmucous membrane adjacent to cancer was 85.0% and 20.0%, respectively. Both HSP72 and gp96 stained in cytoplasm. HSP72 and gp96 expression in esophageal squamous cell carcinomas withmetastasis was significantly higher than those with nonmetastasis ( ). The results indicate that there exists a significant correlation between the expression of HSP72 and gp96 and the progression of esophageal squamous cell carcinomas. HSP72 and gp96 expression were significantly associated with the presence of tumor infiltration, lymph node, and remote metastasis. 1. Introduction The Heat shock protein (HSP) family is a highly conserved group of cellular proteins and is upregulated under stress conditions, such as heat, hypoxia, serum deprivation, neoplasia and virus infection [1–3]. It functions as molecular chaperone and biochemical regulator to mediate cell growth, apoptosis, protein homeostasis, and cellular targets of peptides [2]. Aside from their response to heat shock and chemical orphysical stress stimuli, HSPs have been reported to be overexpressed in a wide range of human tumors including breast, endometrial, ovarian, colon, lung, and prostate [4].Studies have also shown that HSP expressions have a close relationship with carcinoma prognosis [4, 5]. They may combine with oncogene products to form complexes and transport them into intracellular special sites and promote cancer cell proliferation and heterogeneous differentiation [6, 7]. Recent studies have also shown that HSP72 and gp96 are highly expressed in cancer tissues and have been used as prognostic markers in some tumors [8–12]. Study indicates the possible roles of HSP72 and gp96 in the development and progression of gastrointestinal carcinomas but detailed information is still ambiguous [13]. Esophageal squamous
Synthesis and Field Emission Properties of Carbon Nanowire-Single Walled Carbon Nanotube Networks Hybrid Films  [PDF]
Lijun Wang, Linghong Liu, Xiaoping Wang, Ying Yu, Junwei Wen, Jian Li
World Journal of Engineering and Technology (WJET) , 2015, DOI: 10.4236/wjet.2015.33C015
Abstract:

Carbon nanowire (CNW)-singlewalled carbon nanotube (SWCNT) networks hybrid films with a large area (~400 mm2) are grown on molybdenum (Mo) layers by microwave plasma chemical vapour deposition system. The Mo layers, which were deposited on Al2O3 ceramic substrates through electron beam evaporation deposition, were pretreated by a laser-grooving (LG) technology. Furthermore, the surface morphology, micro-structure and field emission properties of these samples are characterized by scanning electron microscope, Raman spectra, and field emission I - V measurements. ACNW-SWCNT networks hybrid film was formed in the surface of Mo layer, but the laser etched area (linear pits array area) the distribution of the CNW-SWCNT networks density is lower than the un-etched area CNW-SWCNT networks distribution density. The diameter of the CNWs and SWCNTs, respectively in the 8 - 15 nm and 0.9 - 1.5 nm range, and the length of CNW-SWCNTs ranges from 1 μm to 4 μm. The growth mechanisms of the films were discussed. Effects of LG pretreatment on surface morphologies and microstructure of the hybrid films were investigated. The field electron emission experimental results shown that the ture on field as low as 1.6 V/μm, and a current density of 0.15 mA/cm2 at an electric field of 4.3 V/μm was obtained.

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