Showing papers by "China Three Gorges University published in 2014"
TL;DR: In this article, a review of metal-organic frameworks (MOFs) that possess more common non-zeotype 4-connected topological nets (such as sql, kag, nbo, lvt, cds, qtz, dia, lon, pts, etc.) is presented.
288 citations
TL;DR: In this paper, different stacking modes of 2-(anthracen-9-yl)-4,5-diphenyl-1H-imidazole (ADPI) were constructed with the aid of intermolecular interactions.
Abstract: Different luminescent single crystals of 2-(anthracen-9-yl)-4,5-diphenyl-1H-imidazole (ADPI) were obtained through the construction of different stacking modes with the aid of intermolecular interactions. Both the fluorescence and the stacking mode of the crystals can be reversibly tuned by mechanical and thermal forces to render ADPI piezochromic, which represents a unique example of reversibly controlled solid emission. The regulation of π–π stacking between the anthracene planes by mechanical and thermal forces is suggested to be the main driving force for the piezochromic character of ADPI.
127 citations
TL;DR: Findings provided a new approach to overcome ZVI surface passivation for long-term application and showed that selenate was reduced step by step, with elemental selenium and adsorbed selenite as the dominant reductive products.
114 citations
TL;DR: It is found that increased expression of IF1 in human HCC predicts poor survival and disease recurrence after surgery, and the combination of these two parameters was a more powerful predictor of poor prognosis.
108 citations
TL;DR: Zinc-coordinated conjugated microporous polymers, prepared by linking salen zinc and 1,3,5-triethynylbenzene, exhibit extraordinary activities and group tolerance for the synthesis of functional organic carbonates by coupling epoxides with CO2 at 120 °C and 3.0 MPa without the use of additional solvents.
Abstract: Zinc-coordinated conjugated microporous polymers (zn-cmps), prepared by linking salen zinc and 1,3,5-triethynylbenzene, exhibit extraordinary activities (turnover frequencies of up to 11600 h(-1)), broad substrate scope, and group tolerance for the synthesis of functional organic carbonates by coupling epoxides with co2 at 120 degrees c and 3.0 mpa without the use of additional solvents. the catalytic activity of zn-cmp is comparable to those of homogeneous catalysts and superior to those of other heterogeneous catalysts. this catalyst could be reused more than ten times without a significant decrease in performance.
93 citations
TL;DR: In this paper, the NiO/Ni nanowalls are directly grown on porous Ni foam via a facile electrochemical corrosion method and subsequent annealing, which show excellent cycle stability and rate capability as anode for lithium ion batteries.
89 citations
TL;DR: In this article, a load density method is introduced to determine the optimal capacity of the EV charging stations in the areas to be planned, and the difference between 1 and the weight coefficients obtained by the analytic hierarchy process (AHP) method is used to calculate the cost coefficients of the charging station.
81 citations
TL;DR: The finite-time synchronization between two complex dynamical networks via the periodically intermittent adaptive control and the intermittently intermittent feedback control is studied.
Abstract: In this paper, the finite-time synchronization between two complex dynamical networks via the periodically intermittent adaptive control and the periodically intermittent feedback control is studied. The finite-time synchronization criteria are derived based on finite-time stability theory, the differential inequality and the analysis technique. Since the traditional synchronization criteria for some models are improved in the convergence time by using the novel periodically intermittent adaptive control and periodically intermittent feedback control, the results of this paper are important. Numerical examples are finally presented to illustrate the effectiveness and correctness of the theoretical results.
76 citations
TL;DR: In this paper, a model of thermal unit commitment problem with wind power integration is established and chance constrained programming is applied to simulate the effects of wind power fluctuation to solve the problem.
71 citations
TL;DR: The data demonstrate that miR-22 could inhibit apoptosis of cardiomyocytes through one of its targets, CBP, and may constitute a new therapeutic target for the prevention of myocardial I/R injury.
Abstract: MicroRNAs are extensively involved in the pathogenesis of major cardiovascular diseases by suppressing target gene expression. Recent studies have reported that microRNA-22 (miR-22) may be implicated in ischemia-reperfusion (I/R) induced myocardial injury. However, the specific function of miR-22 in myocardial I/R injury is far from clear nowadays. The present study was designed to determine the role of miR-22 in myocardial I/R injury and investigate the underlying cardio-protective mechanism. The rat myocardial I/R injury model was induced by occluding the left anterior descending coronary artery for 30 min followed by 12 h reperfusion. As predicted, adenovirus-mediated miR-22 overexpression markedly reduced the release of creatine kinase and lactate dehydrogenase, infarct size and cardiomyocytes apoptosis. Moreover, CREB binding protein (CBP) as a potential miR-22 target by bioinformatics was significantly inhibited after miR-22 transfection. We also found that p53 acetylation activity, pro-apoptotic related genes Bax and p21 levels were all decreased associated with the down-regulation of CBP. In conclusion, our data demonstrate that miR-22 could inhibit apoptosis of cardiomyocytes through one of its targets, CBP. Thus, miR-22 may constitute a new therapeutic target for the prevention of myocardial I/R injury.
70 citations
TL;DR: Porous Cu3P/Cu anode was prepared in this paper, which shows good electrochemical performance because of a novel electrochemical reconstruction in cycling, and it can be an ideal high energy density anode for Li-ion batteries.
Abstract: Porous Cu3P/Cu anode was prepared, which shows good electrochemical performance because of a novel electrochemical reconstruction in cycling. The compatible voltage plateau, specific capacity and density of Cu3P suggest that it can be an ideal high energy density anode for Li-ion batteries.
TL;DR: Li 3 VO 4 nanoparticles with mean size about 100nm are uniformly deposited on the surface of natural graphite via a quasi sol gel method as mentioned in this paper, which shows excellent cycle stability and rate capability.
TL;DR: In this paper, a one-pot hydrothermal method using thiourea as the sulfur source and reducing agent was used to synthesize a CuS/graphene composite for anode materials for lithium ion batteries.
TL;DR: Variable-temperature magnetic susceptibility measurements reveal that complexes 2 and 3 show antiferromagnetic interactions between the adjacent Co(II) ions, whereas 4 is a ferromagnetic system.
Abstract: Five new coordination polymers, namely, [Mn(2,2′-bipy)(H2O)2(H2L1)]n (1), {[Co(btb)(H2O)2(H2L1)]·0.5H2O}n (2), [Co(bib)(H2O)2(H2L1)]n (3), [Ni2(bpm)(H2O)3(L2)]n (4), and {[Co2(H2O)3(OH)(HL2)]·H2O}n (5), (H4L1 = 1,1′:2′,1′′-terphenyl-4,4′,4′′,5′-tetracarboxylic acid, H4L2 = 1,1′:2′,1′′-terphenyl-3,3′′,4′,5′-tetracarboxylic acid, 2,2′-bipy = 2,2′-bipyridine, btb = 1,4-bis(1,2,4-triazol-1-yl)butane, bib = 1,4-bis(imidazol-1-yl)butane, bpm = bis(4-pyridyl)amine), have been obtained under hydrothermal conditions. Complex 1 exhibits a 3D supramolecular framework based on 1D chains. Both complexes 2 and 3 are 3D supramolecular frameworks constructed from 1D zig-zag chains. Complex 4 features a 3D tetra-nodal (3,4,4,5)-connected architecture containing 1D μ-COO bridged chains with (52·62·7.9)(52·64·73·8)2(52·6)2(63·72·9) topology. Complex 5 shows a 3D penta-nodal (3,4,4,6,6)-connected net containing 1D μ-OH/μ-COO bridged chains and mononuclear Co(II) nodes with a (42·63·8)(43)2(44·62)2(44·66·85)2(44·67·84) topology. Variable-temperature magnetic susceptibility measurements reveal that complexes 2 and 3 show antiferromagnetic interactions between the adjacent Co(II) ions, whereas 4 is a ferromagnetic system.
TL;DR: It is suggested that apoptosis in the mitochondrial pathway mediates compromised reproductive system function caused by BPA exposure, which resulted in compromised male rat spermatogenesis and reproductive damage.
TL;DR: Insight is provided for further understanding Kir potassium channel function in the inner ear and the pathogenesis of deafness due to KCNJ10 deficiency, and also for developing therapeutic strategies targeting this deafness.
TL;DR: It is concluded that water leakage could be further reduced by improving leakage detection capability through a combination of predictive modeling and monitoring instruments, optimizing pipe maintenance strategy, and developing an instant pressure regulation system.
Abstract: Water supply is the primary element of an urban system. Due to rapid urbanization and water scarcity, maintaining a stable and safe water supply has become a challenge to many cities, whereas a large amount of water is lost from the pipes of distribution systems. Water leakage is not only a waste of water resources, but also incurs great socio-economic costs. This article presents a comprehensive review on the potential water leakage control approaches and specifically discusses the benefits of each to environmental conservation. It is concluded that water leakage could be further reduced by improving leakage detection capability through a combination of predictive modeling and monitoring instruments, optimizing pipe maintenance strategy, and developing an instant pressure regulation system. The environment could benefit from these actions because of water savings and the reduction of energy consumption as well as greenhouse gas emissions.
TL;DR: The results of this study indicate that the SurgimapSpine measurement is an equivalent measuring tool to the traditional manual in coronal Cobb angle, but is advantageous in spino-pelvic measurement in T2-T5, PT, PI, SS, and LL.
Abstract: Although many studies on reliability and reproducibility of measurement have been performed on coronal Cobb angle, few results about reliability and reproducibility are reported on sagittal alignment measurement including the pelvis. We usually use SurgimapSpine software to measure the Cobb angle in our studies; however, there are no reports till date on its reliability and reproducible measurements. Sixty-eight standard standing posteroanterior whole-spine radiographs were reviewed. Three examiners carried out the measurements independently under the settings of manual measurement on X-ray radiographies and SurgimapSpine software on the computer. Parameters measured included pelvic incidence, sacral slope, pelvic tilt, Lumbar lordosis (LL), thoracic kyphosis, and coronal Cobb angle. SPSS 16.0 software was used for statistical analyses. The means, standard deviations, intraclass and interclass correlation coefficient (ICC), and 95% confidence intervals (CI) were calculated. There was no notable difference between the two tools (P = 0.21) for the coronal Cobb angle. In the sagittal plane parameters, the ICC of intraobserver reliability for the manual measures varied from 0.65 (T2–T5 angle) to 0.95 (LL angle). Further, for SurgimapSpine tool, the ICC ranged from 0.75 to 0.98. No significant difference in intraobserver reliability was found between the two measurements (P > 0.05). As for the interobserver reliability, measurements with SurgimapSpine tool had better ICC (0.71 to 0.98 vs 0.59 to 0.96) and Pearson’s coefficient (0.76 to 0.99 vs 0.60 to 0.97). The reliability of SurgimapSpine measures was significantly higher in all parameters except for the coronal Cobb angle where the difference was not significant (P > 0.05). Although the differences between the two methods are very small, the results of this study indicate that the SurgimapSpine measurement is an equivalent measuring tool to the traditional manual in coronal Cobb angle, but is advantageous in spino-pelvic measurement in T2-T5, PT, PI, SS, and LL.
TL;DR: In this paper, the Curie-Weiss fit revealed the paramagnetic moment per Co ion were 4.09μ B, 4.12μ B and 4.36μ B for x = 0.15, 0.20, and 0.25 respectively.
TL;DR: Single-crystal X-ray diffraction analyses indicate that compounds 1 and 2 are isomers, and both of them exhibit two-dimensional structures with the same uninodal 3-connected fes topology, and suggested that the structural diversity of the compounds could be tuned by altering the auxiliary ligand.
Abstract: A series of zinc(II) compounds, [Zn2(btca)2(im)2]·(DMA) (1; H2btca = benzotriazole-5-carboxylate acid, im = imidazole, and DMA = N,N-dimethylacetamide), [Zn(btca)(im)]·(DMF) (2; DMF = N,N-dimethylformamide), [Zn2(btca)2(tmdpy)]·2(DMF)·5(H2O) [3; tmdpy = 1,3-di(4-pyridyl)propane], and [H2N(CH3)2]2[Zn3(btca)4]·(DMF) (4), have been successfully synthesized via rational control of experimental conditions. Single-crystal X-ray diffraction analyses indicate that compounds 1 and 2 are isomers, and both of them exhibit two-dimensional structures with the same uninodal 3-connected fes topology. Additionally, the three-dimensional (3D) structure of 3 was obtained by using tmdpy instead of an im ligand under synthesis conditions similar to those of compound 2. Interestingly, compound 3 presents a pillared-layer structure with a (3,4)-connected (4.82.103)(4.82) topology. When 4,4′-bipyridine was used to replace tmdpy, the assembly between Zn2+ ions and H2btca ligands produced a chiral 3D framework of 4. Furthermore, ...
TL;DR: A redox-active Cu(I) boron imidazolate framework with ladder-chain structure shows mechanochromic luminescence and can directly reduce Ag nanoparticles into its structure, due to the presence of rich B-H functional bonds in the structure.
TL;DR: In this article, double-walled core-shell structured Si@SiO2@C nanocomposite has been prepared by calcination of silicon nanoparticles in air and subsequent carbon coating.
Abstract: Double-walled core-shell structured Si@SiO2@C nanocomposite has been prepared by calcination of silicon nanoparticles in air and subsequent carbon coating. The obtained Si@SiO2@C nanocomposite demonstrates a reversible specific capacity of about 786 mAh g−1 after 100 cycles at a current density of 100 mA g−1 with a capacity fading of 0.13 % per cycle. The enhanced electrochemical performance can be due to that the double walls of carbon and SiO2 improve the electronic conductivity and enhance the compatibility of electrode materials and electrolyte as a result of accommodating the significant volumetric change during cycles. The interlayer SiO2 may release the mechanical strain and enhance the interfacial adhesion between carbon shell and silicon core.
TL;DR: Finite time dual neural networks with a new activation function that has two tunable parameters are presented to solve quadratic programming problems and are applied to estimate parameters for an energy model of belt conveyors.
TL;DR: In this article, a gram-scale synthesis of 3-[(E)-2-(7-chloroquinolin-2-yl)vinyl]benzaldehyde, a key intermediate of leukotriene receptor antagonist (Montelukast), was demonstrated.
Abstract: Bioactive azaarene-substituted lactic acids, β-hydroxy esters, 3-hydroxy-2H-indol-2-ones, and 2-alkenylazaarenes were prepared in moderate-to-excellent yields via C(sp3)–H functionalization of methyl azaarenes with carbonyl compounds in the presence of iron(II) acetate as an inexpensive, nontoxic, efficient catalyst. The application of this atom-, step-economic, and environmentally friendly method was demonstrated by a gram-scale synthesis of 3-[(E)-2-(7-chloroquinolin-2-yl)vinyl]benzaldehyde, a key intermediate of leukotriene receptor antagonist (Montelukast).
TL;DR: In this paper, an exact 2D analytical method is proposed to calculate the magnetic field distribution in a concentric magnetic gear with Halbach permanent-magnet arrays, and analyzes the relationship between the parameters and maximum static torque.
Abstract: Concentric magnetic gears hold a promising future in the field of low speed and high torque. To obtain a sinusoidal distribution of air gap magnetic field, in this paper, exact 2-D analytical method is proposed to calculate the magnetic field distribution in a concentric magnetic gear with Halbach permanent-magnet arrays, and analyzes the relationship between the parameters and maximum static torque, the parameters include width of modulating ring core, height of modulating ring and thickness of outer rotor yoke. Compared air-gap magnetic field distributions computed by the analytical method with those obtained from the 2-D finite-element method (FEM), the analytical and the FEM results are in good accordance, which proves the proposed method is correct and effective. According to the results of parameters analysis, the concentric magnetic gear prototype is produced, which the numbers of pole pairs on the inner and outer rotors are 4 and 17, respectively. The test results show reasonable structural parameters can improve the torque density of magnetic gears, and the design of magnetic gear provides a useful reference.
TL;DR: This study aimed to evaluate the usefulness of VTI in differentiating malignant from benign thyroid nodules and acoustic radiation force impulse elastography.
Abstract: Objectives- Acoustic radiation force impulse elastography is a newly developed ultrasound elasticity imaging technique that included both Virtual Touch tissue quantification and Virtual Touch tissue imaging (VTI; Siemens Medical Solutions, Mountain View, CA). This study aimed to evaluate the usefulness of VTI in differentiating malignant from benign thyroid nodules. Methods- This study included 192 consecutive patients with thyroid nodules (n = 219) who underwent surgery for compressive symptoms or suspicion of malignancy. Tissue stiffness on VTI elastography was scored from 1 (soft) to 6 (hard). The VTI scores between malignant and benign thyroid nodules were compared. The intraobserver and interobserver agreement for VTI elastography was also assessed. Results- On VTI elastography: score 1 was found in 84 nodules (all benign); score 2 in 37 nodules (3 papillary carcinomas and 34 benign nodules); score 3 in 25 nodules (1 medullary carcinoma, 6 papillary carcinomas, and 18 benign nodules); score 4 in 53 nodules (50 papillary carcinomas and 3 benign nodules); score 5 in 17 nodules (14 papillary carcinomas and 3 benign nodules); and score 6 in 3 nodules (all papillary carcinomas). A VTI elasticity score of 4 or greater was highly predictive of malignancy (P< .01), and the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were 87.0% (67 of 77), 95.8% (136 of 142), 91.8% (67 of 73), 93.1% (136 of 146), and 92.7% (203 of 219), respectively. The κ values were 0.69 for intraobserver agreement and 0.85 for interobserver agreement. Conclusions- Virtual Touch tissue elasticity imaging has great potential as an adjunctive tool combined with conventional sonography for differential diagnosis between benign and malignant thyroid nodules.
TL;DR: In this paper, the SnS/graphene nanocomposite combines the advantages of the good cycling stability of graphene and the high capacity of SnS nanoparticles by using thiourea as the sulfur source and reducing agent.
TL;DR: The in vitro and in vivo assays showed that overexpression of miR-371-5p resulted in cell proliferation and increased tumor growth, which was associated with inhibitor of growth 1 (ING1) downregulation, which may have a critical role in PDAC.
Abstract: Background microRNAs (miRNAs) play a critical role in tumorigenesis, either as a tumor suppressor or as an oncogenic miRNA, depending on different tumor types. To date, scientists have obtained a substantial amount of knowledge with regard to miRNAs in pancreatic cancer. However, the expression and function of miR-371-5p in pancreatic cancer has not been clearly elucidated. The aim of this study was to investigate the roles of miR-371-5p in pancreatic cancer and its association with the survival of patients with pancreatic cancer. Methods The expression of miR-371-5p was examined in pancreatic duct adenocarcinoma (PDAC) and their adjacent normal pancreatic tissues (ANPT) or in pancreatic cancer cell lines by qRT-PCR. The association of miR-371-5p expression with overall survival was determined. The proliferation and apoptosis of SW-1990 and Panc-1 cells, transfected with miR-371-5p mimics or inhibitor, were assessed using MTT assay and flow cytometry, respectively. The tumorigenicity was evaluated via mice xenograft experiments. miR-371-5p promoter interactions were analyzed by chromatin immunoprecipitation assays (ChIP). Protein expression was analyzed by Western blot. Results The expression level of miR-371-5p was dramatically upregulated in clinical PDAC tissues compared with ANPT. Patients with high miR-371-5p expression had a significantly shorter survival than those with low miR-371-5p expression. The in vitro and in vivo assays showed that overexpression of miR-371-5p resulted in cell proliferation and increased tumor growth, which was associated with inhibitor of growth 1 (ING1) downregulation. Interestingly, we also found that ING1, in turn, inhibited expression of miR-371-5p in the promoter region. Conclusions our study demonstrates a novel ING1-miR-371-5p regulatory feedback loop, which may have a critical role in PDAC. Thus miR-371-5p can prove to be a novel prognostic factor and therapeutic target for pancreatic cancer treatment.