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Synthesis and Characterization of Sulfonated Graphene and Conducting Films
YUAN Wen-Hui, GU Ye-Jian, LI Bao-Qing, LI Li
无机材料学报 , 2012, DOI: 10.3724/sp.j.1077.2012.12135
Abstract: Graphite oxide (GO) was prepared from graphite by Hummers liquid oxidation method and the sulfonated graphene (S-GNS) was then prepared by pre-reduction, sulfonation and post-reduction. Glucose was also used to reduce the agglomeration among the graphene layers. The as-prepared sulfonated graphene was characterized by Fourier transform infrared spectroscope (FT-IR), X-ray photoelectron spectroscope (XPS), Thermo- gravimetric analysis (TG), X-ray diffraction (XRD), Scanning electron microscope (SEM), Transmission electron microscope (TEM) and Atomic force microscope (AFM), respectively. The experimental results indicate that the graphene of the p-phenyl-SO3H groups is successfully grafted into graphite oxide, and graphite oxide is completely reduced to sulfonated graphene. The sulfonated graphene possesses high thermal stability, smooth surface and few defects, and the thickness of single layer graphene is approximately 1.2 nm. Water solubility and dispersion results show that the sulfonated graphene can be dispersed into water with good water solubility. In addition, the BET specific surface area and the electrical conductivity of the sulfonated graphene film are up to 806.4 m2/g and 1150 S/m, respectively.
Facile Synthesis of Graphene/ZnO Nanocomposites by a Low―temperature Exfoliation Method
YUAN Wen-Hui, GU Ye-Jian, LI Bao-Qing, LI Li
无机材料学报 , 2012, DOI: 10.3724/sp.j.1077.2012.00591
Abstract: Graphite oxide/ZnO was prepared at low temperature (80 par; with graphite oxide (GO) and zinc sulfate heptahydrate (ZnSO4·7H2O) as initial reactants. The graphene/ZnO (GNS/ZnO) was then prepared by a low―temperature chemical exfoliation method. The as―prepared GNS/ZnO was characterized by X―ray diffraction (XRD), Fourier transform infrared spectroscope (FT―IR), thermo―gravimetric analysis (TG), X―ray photoelectron spectroscopy (XPS), Raman spectra (RS), scanning electron microscope (SEM) and transmission electron microscope (TEM), respectively. The results indicate that graphite oxide is completely reduced to graphene and the well―dispersed ZnO nanoparticles are successfully deposited on graphene sheets as spacers to keep the neighboring sheets separate. Photoluminescence spectra of ZnO and GNS/ZnO nanocomposites display the ?uorescence quenching property of GNS/ZnO, implying that the GNS/ZnO nanocomposites are expected for practical use in the field of photoelectronics.
Mineral behavior in coal under reducing atmosphere at high temperature
高温弱还原气氛下煤中矿物质变化的研究

BAI Jin,LI Wen,LI Bao-qing,
白进
,李文,李保庆

燃料化学学报 , 2006,
Abstract: The behaviors of mineral matters in coal at high temperature were investigated under reducing atmosphere. X-ray diffraction and SEM-EDX were employed to observe phase changes and reactions of mineral matters. It is found that the phase composition and reactions of mineral matters are basically consistent with ternary phase diagram of CaO-SiO2-Al2O3. The system of mineral matters is mainly dominated by the change of Ca-aluminosilicates. The residence time influences both the crystalline and amorphous characteristics of mineral matters. The amounts of the amorphous phase appear to be dependent on the stability of the eutectic mixture. Under reducing atmosphere, FeO-FeS system has a significant influence on the mineral behaviors and morphologies.
Multidirectional Image Edge Detection Based on Wavelet Laid
基于小波分层的多方向图像边缘检测

WEN Shan,LI Bao-Qing,
文山
,李葆青

自动化学报 , 2007,
Abstract: Image edge detection plays a very important role in image processing. It can serve as a basis for modal distinction, image division and image scene analysis. Traditional edge image detection is easy to do and its direction adaptation is very good. However, the image edge is diverse, e.g. it has different directions, different robustness, etc, which limits its uses, But it also has its own disadvantages. This paper is an attempt to get single-edge branch images using wavelet transform, These branch images can be detected separately by edge detection operation, whose direction adaptation is very close to that of single-edge detection. Image edges of different layers can be achieved finally. And these edges can be synthesized, thereby giving rise to better image edges, The operation is easy and the result is good.
Study on Porous Scaffold of Nano Hydroxyapatite/poly (|ícaprolactone) Bioactive Composite
SU Jia-Can,LI Ming,YU Bao-Qing,ZHANG Chun-Cai
无机材料学报 , 2009, DOI: 10.3724/sp.j.1077.2009.00485
Abstract: Nano hydroxyapatite (n-HA) and its composite with poly(|ícaprolactone) (PCL) were fabricated by hydrothermally synthesized method, and the well interconnected macroporous nano-composite scaffolds with pore diameter from 200| to 400| were prepared by melt-cast/salt particle-leaching technique. The biological properties of the composite scaffolds were investigated through cell culture and animal implanted experimentation. The results show that porosity of the composite scaffolds increases with the increase of the quantity of the porogens used while the compressive strength decrease. The maximal porosity of the composite scaffold can reach 86% while its compressive strength is only 2.4MPa. The attachment ratio and proliferation of MG63 cells on the composite scaffolds increase with the increase of HA content in the composite, which are significantly higher than those of PCL alone. Histological examinations confirm that the new bony tissue could grow easily into the composite scaffold and directly integrate with the composite by bone-bonding. The results indicate that the n-HA/PCL composite scaffolds have excellent biocompatibility and bioactivity.
HAb18G/CD147 Regulates Vinculin-Mediated Focal Adhesion and Cytoskeleton Organization in Cultured Human Hepatocellular Carcinoma Cells
Qiang Liang, Qing Han, Wan Huang, Gang Nan, Bao-Qing Xu, Jian-Li Jiang, Zhi-Nan Chen
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0102496
Abstract: Focal adhesions (FAs), integrin-mediated macromolecular complexes located at the cell membrane extracellular interface, have been shown to regulate cell adhesion and migration. Our previous studies have indicated that HAb18G/CD147 (CD147) is involved in cytoskeleton reorganization and FA formation in human hepatocellular carcinoma (HCC) cells. However, the precise mechanisms underlying these processes remain unclear. In the current study, we determined that CD147 was involved in vinculin-mediated FA focal adhesion formation in HCC cells. We also found that deletion of CD147 led to reduced vinculin-mediated FA areas (P<0.0001), length/width ratios (P<0.0001), and mean intensities (P<0.0001). CD147 promoted lamellipodia formation by localizing Arp2/3 to the leading edge of the cell. Deletion of CD147 significantly reduced the fluorescence (t1/2) recovery times (22.7±3.3 s) of vinculin-mediated focal adhesions (P<0.0001). In cell-spreading assays, CD147 was found to be essential for dynamic focal adhesion enlargement and disassembly. Furthermore, the current data showed that CD147 reduced tyrosine phosphorylation in vinculin-mediated focal adhesions, and enhanced the accumulation of the acidic phospholipid phosphatidylinositol-4, 5-bisphosphate (PIP2). Together, these results revealed that CD147 is involved in vinculin-mediated focal adhesion formation, which subsequently promotes cytoskeleton reorganization to facilitate invasion and migration of human HCC cells.
Construct of Yangtze-Huai River Rural Areas Ecological Drainage System and Its Retention Effect on Pollutants
江淮农村生态型排水系统构建及截污作用研究

SHAN Bao-qing,LI Nan,TANG Wen-zhong,
单保庆
,李楠,唐文忠

环境科学 , 2012,
Abstract: 以安徽省巢湖北岸牌坊陈村为例,构建了一种由沟渠、水塘和湿地组合而成的生态型排水系统,并研究了该系统对农村降雨径流污染的截控作用. 构建的牌坊陈村生态型排水系统实现了污水排放、收集和处理一体化,系统通过各组成单元物理、化学和生物综合作用,对降雨径流中污染物具有较高的截留率,减少了营养盐对周围水体输出负荷. 3场降雨监测结果表明,系统对TSS、COD、TP和TN的平均截留率分别为78.2%、57.8%、55.5%和64.2%,系统出水中TSS、COD、TP和NH4+-N平均质量浓度分别为23.5、66.3、0.49和3.03 mg·L-1,达到《污水综合排放标准》一级标准要求. 水塘作为系统主要截流、纳污以及蓄水单元,其日常水质指标TSS、COD、TP和TN平均质量浓度分别为28.0、31.2、0.47和4.65 mg·L-1,基本符合《地表水环境质量标准》中Ⅴ类标准要求.
Study on Preparation and Properties of Self―setting Silicon HydroxyapatiteBone Cement
SU Jia-Can, CAO Lie-Hu, YU Bao-Qing, WANG Zhi-Wei, CHEN Xiao, LI Ming
无机材料学报 , 2010, DOI: 10.3724/sp.j.1077.2011.00055
Abstract: Siliconhydroxyapatite cement (s―HAC) was prepared by using the mixed powders oftetracalcium phosphate and dicalcium phosphate anhydrous, and 5wt% sodiumsilicate water solutions as cement liquid. The results show that the settingtime of s―HAC is shorter than hydroxyapatite cement (HAC), and the compressivestrength of s―HAC is higher than HAC in the same situation. The XRD resultsreveal that the finally hardening product of s―HAC is hydroxyapatite structure,which is similar to that of HAC. The s―HAC in the could release calcium (Ca),phosphorus (P) and silicon (Si) ions. The <>in vitro degradability of s―HACin Tris―HCl solution is better than that of HAC. The cell culture experimentalresults indicate that the cell can attach on both the surfaces of s―HAC andHAC, and have good cell morphology. The optical density (OD) and alkalinephosphate (ALP) activity of MG63 cells on s―HAC are significantlyhigher that that of HAC, indicating that the s―HAC could promote the cellproliferation and differentiation.
Transformation behavior of chlorine in coals during sub-critical water treatment
煤中氯在亚临界水条件下的变迁

WANG Bao-feng,LI Wen,LI Bao-qing,YUCHI Wei,
王宝凤
,李 文,李保庆,尉迟唯

燃料化学学报 , 2007,
Abstract: 运用半连续反应装置对山西吴家坪煤和四川华蓥山煤中氯在亚临界水条件下的脱除规律及形态变化进行了研究.考察了反应温度和压力对氯脱除率的影响;同时还运用化学提取法对原煤及残渣中氯的形态进行了研究.研究结果表明,随着反应温度的升高,煤中氯的脱除率也增加,在410 ℃、15 MPa、60 min、水流量为580 mL/h时,吴家坪煤中氯的脱除率为84.6%,华蓥山煤中氯的脱除率为72.4%.吴家坪煤中氯在15 MPa时的脱除率最大.华蓥山煤中氯主要以有机氯的形态存在,而吴家坪煤中氯有8%为离子可交换态的无机氯,其余为有机结合的氯;在亚临界水萃取煤的过程中,离子交换态结合的有机氯比共价键结合的有机氯更容易挥发,有机氯要首先转化为无机氯然后再逸出.
MOLECULAR MODELING OF COAL MACERALS BY USING QUANTUM CHEMISTRY
煤显微组分分子结构模型的量子化学研究

SUN Qing-lei,LI Wen,CHEN Hao-kan,LI Bao-qing,
孙庆雷
,李 文,陈皓侃,李保庆

燃料化学学报 , 2004,
Abstract: 采用分子力学和半经验量子化学方法,研究了神木煤显微组分的分子结构模型,比较了镜质组和惰质组分子模型的能量构成、不同类型键的键长和键裂解能。研究结果表明,扭转能和范德华能是分子中的主要作用力,取代基对体系能量有明显影响,烷基取代基使体系能量增加,而苯基取代基使体系能量降低;脂肪C-C键长比芳香C-C键长长,说明脂肪C-C在受热过程中比芳香C-C更容易断裂分解。对各键裂解能的计算结果表明,Car-Cal键的裂解能高于Cal-Cal,Car-O醚键的裂解能高于Cal-O醚键。而惰质组结构模型中除C-O醚键外,各键的裂解能均高于镜质组,说明惰质组结构模型比镜质组有较高的热稳定性。
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