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Search Results: 1 - 10 of 4212 matches for " Linghao Kong "
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Resveratrol Attenuates the Na+-Dependent Intracellular Ca2+ Overload by Inhibiting H2O2-Induced Increase in Late Sodium Current in Ventricular Myocytes
Chunping Qian, Jihua Ma, Peihua Zhang, Antao Luo, Chao Wang, Zhiqiang Ren, Linghao Kong, Shuo Zhang, Xiaojing Wang, Ying Wu
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0051358
Abstract: Background/Aims Resveratrol has been demonstrated to be protective in the cardiovascular system. The aim of this study was to assess the effects of resveratrol on hydrogen peroxide (H2O2)-induced increase in late sodium current (INa.L) which augmented the reverse Na+-Ca2+ exchanger current (INCX), and the diastolic intracellular Ca2+ concentration in ventricular myocytes. Methods INa.L, INCX, L-type Ca2+ current (ICa.L) and intracellular Ca2+ properties were determined using whole-cell patch-clamp techniques and dual-excitation fluorescence photomultiplier system (IonOptix), respectively, in rabbit ventricular myocytes. Results Resveratrol (10, 20, 40 and 80 μM) decreased INa.L in myocytes both in the absence and presence of H2O2 (300 μM) in a concentration dependent manner. Ranolazine (3–9 μM) and tetrodotoxin (TTX, 4 μM), INa.L inhibitors, decreased INa.L in cardiomyocytes in the presence of 300 μM H2O2. H2O2 (300 μM) increased the reverse INCX and this increase was significantly attenuated by either 20 μM resveratrol or 4 μM ranolazine or 4 μM TTX. In addition, 10 μM resveratrol and 2 μM TTX significantly depressed the increase by 150 μM H2O2 of the diastolic intracellular Ca2+ fura-2 fluorescence intensity (FFI), fura-fluorescence intensity change (△FFI), maximal velocity of intracellular Ca2+ transient rise and decay. As expected, 2 μM TTX had no effect on ICa.L. Conclusion Resveratrol protects the cardiomyocytes by inhibiting the H2O2-induced augmentation of INa.L.and may contribute to the reduction of ischemia-induced lethal arrhythmias.
Chirality control by electric field in periodically poled MgO-doped lithium niobate
Lei Shi,Linghao Tian,Xianfeng Chen
Physics , 2012,
Abstract: We study the chirality of periodically poled MgO-doped lithium niobate (MgO:PPLN) by electro-optic (EO) effect. It shows that optical propagation is reciprocal in MgO:PPLN when quasi-phase-matching (QPM) condition is satisfied, which is similar to natural optical active material like quartz. The specific rotation of MgO:PPLN by EO effect is shown to be proportional to the transverse electric field, making large polarization rotation in optical active material with small size possible. We also demonstrate that the chirality of MgO:PPLN can be controlled by external electric field.
Construct the Community of IT Education and Break the Bottleneck of Rural School Educational Informationization  [PDF]
Dehua Kong
Intelligent Information Management (IIM) , 2012, DOI: 10.4236/iim.2012.44025
Abstract: Based on the current situation of rural educational informationization, my study found that the boost of rural elementary and secondary school’s educational informationization needed the cooperation of higher normal universities and local education administrative department. The construction of “IT education community” is the key to step off the predicament. The practice application and effect in Gaoping City further proved that the cooperation project broke the bottleneck of rural elementary and secondary school’s educational informationization.
The Atomic Regular Polyhedron Electronic Shell  [PDF]
Zilong Kong
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.410A1001
Abstract:

The periodic table of elements is arranged based on a series of regular polyhedron. The stability of inert gas atoms can be explained by the distribution of electrons, as well as their motion and magnetic force structure. A magnetic force regular octahedron is proposed. It is a unique configuration that best satisfies the convergence of electrons moving in the same direction within regular polyhedra. In the case of an electrostatic force crust, the formal electron spin accounts for the crusts intrinsic magnetic moment exceeding the speed of light. If one is to consider that the electron has a magnetic outer layer and an electrostatic inner layer, then the question can be solved and abovementioned inference can provide the basis for magnetic force and momentum for the regular octahedron model. The electron periphery has twenty-petal adsorptive substances; the existence of adsorptive substance causes the magnetic force greater than the electrostatic force. Each electronic shell in the regular polyhedron is in accordance with the electron configuration of periodic table of elements; the kinetic track of each electron is a surface of regular polyhedron. The magnetic properties of iron, cobalt, and nickel can be explained by the regular dodecahedron electronic shell of an atom. The electron orbit converged from reverse direction can explain diamond. The adsorptive substances found in atomic nuclei and electrons are defined as magnetic particles called magnetons. The thermodynamic magneton theory can be better explained when it is analyzed using principles of thermodynamics, superconductivity, viscosity, and even in the creation of glass. The structure of the light is a helical line.

Ferromagnetic Calculation of Terbium Dysprosium and Holmium with Polyhedron Electron Shell  [PDF]
Zilong Kong
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.613179
Abstract: Based on the regular polyhedron model of multi-electronic atom combined with the Bohr hypothesis, the following supposition is put forward: the electron momentum multiplied by the inscribed sphere radius of edges of each regular polyhedron is equal to the Planck constant. The relationship between saturation magnetization rates and Planck constants is determined, and the ferromagnetism of atoms is obtained from regular dodecahedron and regular hexahedron. Then, terbium, dysprosium, and holmium saturation magnetization rate are obtained from electronic regular polyhedron configuration. Derivation of matter wave formula is from thermodynamics, avoiding over speed of light.
The Pricing of IPO by Investment Banks and Venture Capital: A Theoretical Model  [PDF]
Huanran Kong
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.610017
Abstract: The venture capitalists provide supervision and certification service for shareholding enterprises, which reduce the information asymmetry and attract more high quality investment banks. Thus, the price is close to the market price when the enterprise enters the market and under-pricing is avoided thereby. Based on the supervision and certification hypothesis, this paper builds a pricing model of investment banks and venture capital to explain the pricing mechanism of investment bank, investment risk pricing mechanism and the causes of underpricing.
Long-Term Nitrogen Addition Leads to Loss of Species Richness Due to Litter Accumulation and Soil Acidification in a Temperate Steppe
Ying Fang, Fen Xun, Wenming Bai, Wenhao Zhang, Linghao Li
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0047369
Abstract: Background Although community structure and species richness are known to respond to nitrogen fertilization dramatically, little is known about the mechanisms underlying specific species replacement and richness loss. In an experiment in semiarid temperate steppe of China, manipulative N addition with five treatments was conducted to evaluate the effect of N addition on the community structure and species richness. Methodology/Principal Findings Species richness and biomass of community in each plot were investigated in a randomly selected quadrat. Root element, available and total phosphorus (AP, TP) in rhizospheric soil, and soil moisture, pH, AP, TP and inorganic N in the soil were measured. The relationship between species richness and the measured factors was analyzed using bivariate correlations and stepwise multiple linear regressions. The two dominant species, a shrub Artemisia frigida and a grass Stipa krylovii, responded differently to N addition such that the former was gradually replaced by the latter. S. krylovii and A. frigida had highly-branched fibrous and un-branched tap root systems, respectively. S. krylovii had higher height than A. frigida in both control and N added plots. These differences may contribute to the observed species replacement. In addition, the analysis on root element and AP contents in rhizospheric soil suggests that different calcium acquisition strategies, and phosphorus and sodium responses of the two species may account for the replacement. Species richness was significantly reduced along the five N addition levels. Our results revealed a significant relationship between species richness and soil pH, litter amount, soil moisture, AP concentration and inorganic N concentration. Conclusions/Significance Our results indicate that litter accumulation and soil acidification accounted for 52.3% and 43.3% of the variation in species richness, respectively. These findings would advance our knowledge on the changes in species richness in semiarid temperate steppe of northern China under N deposition scenario.
Rhizome Severing Increases Root Lifespan of Leymus chinensis in a Typical Steppe of Inner Mongolia
Wenming Bai,Fen Xun,Yang Li,Wenhao Zhang,Linghao Li
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0012125
Abstract: Root lifespan is an important trait that determines plants' ability to acquire and conserve soil resources. There have been several studies investigating characteristics of root lifespan of both woody and herbaceous species. However, most of the studies have focused on non-clonal plants, and there have been little data on root lifespan for clonal plants that occur widely in temperate grasslands.
Do Clonal Plants Show Greater Division of Labour Morphologically and Physiologically at Higher Patch Contrasts?
Zhengwen Wang,Yuanheng Li,Heinjo J. During,Linghao Li
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0025401
Abstract: When growing in reciprocal patches in terms of availability of different resources, connected ramets of clonal plants will specialize to acquire and exchange locally abundant resources more efficiently. This has been termed division of labour. We asked whether division of labour can occur physiologically as well as morphologically and will increase with patch contrasts.
Changes in soil carbon storage due to over-grazing in Leymus chinensis steppe in the Xilin River Basin of Inner Mongolia
Li Linghao,Chen Zuozhong,Wang Qibing,Liu Xianhu,Li Yonghong
环境科学学报(英文版) , 1997,
Abstract: The long—term changes in soil carbon storage due tO land—use change in Leymus chinensis steppe in the Xilin River Basin of Inner Mongolia since 1950’S was examined.The results showed that over—grazing was the most serious and wide—spread non—sustainable land—use practice in the area.an average of about 12.4%of the total carbon initially stored in soils(0—20cm soil layer)for seven major L.chinensis communities in the Xilin River Basin has been lost due to over-grazing over the 40一year period.Most carbon loss due tO over—grazing was from the active and slow soil carbon pools which had a residence time of 10’S of years.
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