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Preparation, Curing Reactivity and Thermal Properties of Titanium-doped Silicone Resins

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Chemical Research in Chinese Universities 2010年第5期26卷 851-856页

作者： WANG xue-mei wu Ya-hong HAO Zhi-feng YU Jian YU Lin Faculty of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China

Novel titanium-doped silicone resins were synthesized from low-cost silane monomers and tetrabutyl titanate as raw materials and hydrochloric acid as catalyst, with titanium element as dopant into principal chain of Si-O-Si. The resins were characterized by means of FTIR, IH NMR and 13C NMR spectra, their thermal properties and curing properties were investigated and their corresponding films were determined. The results show that the thermal stability and storage stability of the resins were influenced by the types of silane monomers containing dif- ferent carbon atomicities of organic group. The thermal stability of the titanium-doped silicone resin with a molar ratio of silane monomer B（n-propyl triethoxysilane） to silane monomer C（n-octyl triethoxysilane） being 1：1 is superior to that of the resin with a molar ratio of silane monomer B to silane monomer C being 1：3. However, the storage stability of the former is inferior to that of the latter. This work also showed that the synthesized titanium-doped silicone resins have the highest thermal stability up to 450--500℃ with an atomicity molar ratio of 1：4 of titanium to silicon in the reactants. But the best storage stability of the resin prepared from the reactants with an atomicity molar ratio of 1：6[n（Ti）：n（Si）] was obtained. The effect of the type and content of curing agent on the curing properties of the resin was also studied. Moreover, thermal mechanism and curing mechanism were proposed in this work.

关键词： Titanium-doped silicone resin Synthesis Thermal stability Curing Mechanism

Late-onset Leigh syndrome without delayed development in China:A case report

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World Journal of Clinical Cases 2021年第24期9卷 7133-7138页

作者： Jian-Min Liang Cui-Juan Xin Guang-Liang Wang xue-mei wu Department of Pediatric Neurology 1st Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Pediatric Neurology Jilin Provincial Key Laboratory of Pediatric NeurologyChangchun 130021Jilin ProvinceChina Department of Cardiology Dalinghe Hospital of Far Eastern HorizonDalinghe 121200Liaoning ProvinceChina

BACKGROUND Leigh syndrome(LS)is one of the most common mitochondrial diseases in infants and *** often manifests as early-onset with delayed phenotypic ***,late-onset LS with normal development and white matter lesions in the brain is rarely reported,thereby highlighting the phenotypic variability of LS *** SUMMARY We report a 12-year-old boy who presented with an unusual late-onset and fulminant form of LS that is maternally inherited without developmental *** patient was admitted to the hospital with symptoms of ptosis and somnolence,and died within 2 *** of peripheral blood leukocytes showed a homoplasmic m.9176T>C mutation in the *** resonance imaging also revealed lesions in bilateral white matter as well as symmetrical lesions in the basal ganglia and brain *** patient was diagnosed with *** patient was treated with vitamin C,vitamin D,and *** patient died within 2 mo of hospital *** LS can present in both infants and older children with different phenotypes.

关键词： Leigh syndrome 9176 mutation Late-onset Case report

Secondary electron emission yield from vertical graphene nanosheets by helicon plasma deposition

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Chinese Physics B 2022年第2期31卷 613-617页

作者： xue-Lian Jin Pei-Yu Ji Lan-Jian Zhuge xue-mei wu Cheng-Gang Jin School of Physical Science and Technology Soochow UniversitySuzhou 215006China Provincial Key Laboratory of Thin Films Soochow UniversitySuzhou 215006China Soochow University Analysis and Testing Center Suzhou 215006China Laboratory for Space Environment and Physical Sciences Harbin Institute of TechnologyHarbin 150001China

The secondary electron emission yields of materials depend on the geometries of their surface *** this paper,a method of depositing vertical graphene nanosheet(VGN)on the surface of the material is proposed,and the secondary electron emission(SEE)characteristics for the VGN structure are *** COMSOL simulation and the scanning electron microscope(SEM)image analysis are carried out to study the secondary electron yield(SEY).The effect of aspect ratio and packing density of VGN on SEY under normal incident condition are *** results show that the VGN structure has a good effect on suppressing SEE.

关键词： secondary electron emission secondary electron yield vertical graphene nanosheets scanning electron microscope

Synthesis and Water Uptake of Sulfonated Poly (phthalazinone ether sulfone ketone)/Polyacrylic Acid Proton Exchange Membranes

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Chinese Chemical Letters 2006年第7期17卷 965-968页

作者： xue mei wu Gao Hong HE Lin GAO Shuang GU Zheng Wen HU Ping Jing YAO State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116012

Novel SPPESK/PAA composite proton exchange membranes with semi-interpenetrating polymer network （sIPN） structure have been synthesized through the in-situ polymerization of acrylic acid （AA） in the presence of sulfonated poly （phthalazinone ether sulfone ketone）（SPPESK）. The composite membranes were identified by FT-IR analysis. Water uptake of the composite membranes was as high as 89.7% at 90℃, nearly one time higher than that of the corresponding SPPESK membrane.

关键词： Proton exchange membranes interpenetrating polymer network in-situ polymerization.

Synthesis of SiC/graphene nanosheet composites by helicon wave plasma

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Chinese Physics B 2021年第7期30卷 339-344页

作者： Jia-Li Chen Pei-Yu Ji Cheng-Gang Jin Lan-Jian Zhuge xue-mei wu School of Physical Science and Technology and Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou 215006China The Key Laboratory of Thin Films of Jiangsu Province Soochow UniversitySuzhou 215006China Laboratory for Space Environment and Physical Sciences Harbin Institute of TechnologyHarbin 150001China Analysis and Testing Center Soochow UniversitySuzhou 215123China

We report an approach to the rapid, one-step, preparation of a variety of wide-bandgap silicon carbide/graphene nanosheet(Si C/GNSs) composites by using a high-density helicon wave plasma(HWP) source. The microstructure and morphology of the Si C/GNSs are characterized by using scanning electron microscopy(SEM), Raman spectroscopy, x-ray diffraction(XRD), x-ray photoelectron spectroscopy(XPS), and fluorescence(PL). The nucleation mechanism and the growth model are discussed. The existence of Si C and graphene structure are confirmed by XRD and Raman *** electron excitation temperature is calculated by the intensity ratio method of optical emission spectroscopy. The main peak in the PL test is observed at 420 nm, with a corresponding bandgap of 2.95 e V that indicates the potential for broad application in blue light emission and ultraviolet light emission, field electron emission, and display devices.

关键词： helicon wave plasma SiC/graphene nanosheet x-ray photoelectron spectroscopy(XPS) fluorescence

Effect of simvastatin on the atherosclerotic plaque stability and the angiogenesis in the atherosclerotic plaque of rabbits

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Chinese Science Bulletin 2009年第15期54卷 3061-3066页

作者： ZHANG Lu JIANG YueRong xue mei wu CaiFeng WANG JingShang YIN HuiJun Department of Cardiovascular Disease Xiyuan Hospital China Academy of Chinese Medical Sciences Beijing 100091 China

In this study, the effect of simvastatin on the atherosclerotic plaque stability and the angiogenesis in the atherosclerotic plaque of rabbits was observed. Thirty New Zealand rabbits were randomly divided into the normal control group, the model control group and the simvastatin group, 10 in each group. Rabbits in the normal control group were fed with normal forage, while rabbits in the rest two groups were fed with high fat forage. The balloon injury was performed two weeks later to establish an abdominal aortic atherosclerosis model, and then high fat forage was successively fed to them. Meanwhile, simvastatin at the daily dose of 2.5 mg/kg body weight was administered to rabbits in the simvastatin group. After 6 weeks of successive administration, levels of blood lipids were measured after blood sampling, and the serum high sensitivity C-reactive protein (hsCRP) and matrix metalloproteinase-3,-9 (MMP-3,-9) were detected using enzyme-linked immunosorbent assay. The macroscopically pathological indices of the plaque tissue were observed using hematoxylin and eosin (HE) staining of abdominal aorta specimens under a light microscope, and the plaque area (PA), cross-sectional vascular area (CVA) and correcting plaque area (PA/CVA) were determined quantitatively using imaging software. The protein expressions of the vascular endothelial growth factor (VEGF), factor VIII related antigen (FVIIIRAg), MMP-3 and cluster of differentiation antigen 40 ligand (CD40L) in the plaque were detected with the immunohistochemical method. Compared with the model control group, the levels of VEGF, FVIIIRAg, MMP-3, CD40L protein expression and the serum expression levels of hsCRP, MMP-3, MMP-9 in the simvastatin group were significantly reduced (P<0.05, P<0.01). The ratio PA/CVA in the simvastatin group was more significantly reduced when compared with that in the model control group (P<0.01). The levels of serum total cholesterol (TC), triglyceride (TG) and low-density lipoprotein ch

关键词：粥样动脉硬化血管发生稳定性医学动物实验

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Influence of Aluminum and Cadmium Stresses on Mineral Nutrition and Root Exudates in Two Barley Cultivars

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Pedosphere 2007年第4期17卷 505-512页

作者： GUO Tian-Rong ZHANG Guo-Ping ZHOU mei-xue wu Fei-Bo CHEN Jin-Xin Agronomy Department Zhejiang University Huajiachi Campus Hangzhou 310029 （China）. University of Tasmania Tasmanian Institute of Agricultural Research Kings Meadows Tasmania 7249 （Australia） College of Life Science Shaoxing University Shaoxing 312000 （China）

A hydroponic experiment was carried out to study the effect of aluminum （Al） and cadmium （Cd） on Al and mineral nutrient contents in plants and Al-induced organic acid exudation in two barley varieties with different Al tolerance. Al- sensitive cv. Shang 70-119 had significantly higher Al content and accumulation in plants than Al-tolerant cv. Gebeina, especially in roots, when subjected to low pH （4.0） and Al treatments （100 μmol L^-1 Al and 100 μmol L^-1 Al ＋1.0 μmol L^-1 Cd）. Cd addition increased Al content in plants exposed to Al stress. Both low pH and Al treatments caused marked reduction in Ca and Mg contents in all plant parts, P and K contents in the shoots and leaves, Fe, Zn and Mo contents in the leaves, Zn and B contents in the shoots, and Mn contents both in the roots and leaves. Moreover, changes in nutrient concentrations were greater in the plants exposed to both Al and Cd than in those exposed only to Al treatment. A dramatic enhancement of malate, citrate, and succinate was found in the plants exposed to 100 μmol L^-1 Al relative to the control, and the Al-tolerant cultivar had a considerable higher exudation of these organic acids than the Al-sensitive one, indicating that Al-induced enhancement of these organic acids is very likely to be associated with Al tolerance.

关键词： aluminum barley (Hordeum vulgate L.) cadmium nutrient content organic acids

Efficacy of the DumonTM Stent in the Treatment of Airway Gastric Fistula： A Case Series Involving 16 Patients

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Chinese Medical Journal 2017年第17期130卷 2119-2120页

作者： Ming-Yao Ke Rui Huang Lian-Cheng Lin Jun-Li Zeng xue-mei wu Department of the Respiratory Centre Xiamen Second Hospital Teaching Hospital of Xiamen Medical University Xiamen Fujian 361000 China

Airway gastric fistula （AGF） is a rare but dangerous complication following esophagectomy for esophageal cancer,with an incidence rate of 0.3-1.9%.[1] For AGF,the primary goal is closure of the fistula between the digestive and respiratory tracts to avert ongoing soilage of the *** surgical repair remains the definitive treatment,it is associated with a mortality rate of 32%.[2]With the development of interventional therapy,airway stenting has become an effective palliative treatment for *** （Novatech,France） stents have been successfully used to treat AGF for years.[3] We conducted this retrospective study to explore the value of these devices to treat AGF.

关键词： Airway Gastric Fistula Complications DumonTM Stent Efficacy

Risk factors for intensive-care-unit-acquired weakness

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World Journal of Clinical Cases 2024年第21期12卷 4853-4855页

作者： Ming Liu Yu-Tong Chen Guang-Liang Wang xue-mei wu Department of Pediatric Neurology First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Cardiology Guo Jin HospitalChangchun 130000Jilin ProvinceChina Jilin Provincial Key Laboratory of Pediatric Neurology Jilin Provincial Key LaboratoryChangchun 130000Jilin ProvinceChina

Wang et al reported 1063 cases from the initial 14 d of intensive care unit(ICU)stay,and analyzed relevant data such as age,comorbidities,recent dosages,vapor pressure dosages,duration of mechanical ventilation,length of ICU stay,and rehabilitation therapy,which are closely related to ICU-acquired weakness(ICUAW).It is suggested that the length of ICU stay and the duration of mechanical ventilation are the main ***-AW is the most common neuromuscular injury in the ICU,which affects clinical progression and outcomes of *** manuscript helps to improve the early recognition of ICU-AW,thereby reducing mortality and improving prognosis.

关键词： Risk factors Intensive care unit Acquired weakness Prognosis Neuromuscular injury