Yuci, China

Time filter

Source Type

Gao A.,Shanxi University | Gao A.,Jinzhong University | Wang L.,Shanxi University | Yuan H.,Shanxi University
Experimental and Toxicologic Pathology | Year: 2012

This paper aims at evaluating the induction of metallothionein (MT) synthesis in gills, heart and hepatopancreas of a freshwater crab, Sinopotamon yangtsekiense. Crabs were exposed to different cadmium concentrations (from 0 to 5. mg/L) from 24 to 96. h. The amount of cadmium (Cd) accumulated in gills, heart and hepatopancreas of the crab showed an increase with an increase in the treatment concentration. Furthermore, the amount of Cd accumulated in these tissues showed an increase with an increase in duration. On the other hand, MT and β-actin genes were amplified using reverse transcription PCR (RT-PCR). Metallothionein gene expression induced by Cd was analyzed using real-time quantitative polymerase chain reaction. Its expression levels were correlated to duration time and increased with cadmium concentrations in water, whilst β-actin was expressed at a relatively constant level. The MT transcript levels in gills and hepatopancreas were higher than that in heart. Furthermore, the MT mRNA expression was not time dependent, and no relationship with Cd accumulation followed the time course of treatment at the same dose Cd treatment. But the clear dose response of MT to cadmium exposure of S. yangtsekiense is a proof of the feasibility of MT as a biomarker for testing cadmium pollution. © 2010 Elsevier GmbH.


Su Y.-L.,Jinzhong University
Food Science and Technology Research | Year: 2016

The aim of the present work was to develop a multimethod for the analysis of five flavonoids in G.biloba leaves. The selected flavonoids were rutin, quercetin 3-D-galactoside, baicalin, isorhamnetin and rhamnetin. Leaf extraction was sonicated by using ethanol. The extract was passed through solid-phase extraction columns. Then, the extract was analyzed by high-performance liquid chromatography coupled in line with mass spectrometry. Calibration was carried out over the concentration range of 0.5 to 50 mg/L. The calibration data presented high correlation coefficients (>0.99). The limits of detection were 4.7, 5.3, 9.7, 6.9 and 12.9 μg/L for rutin, quercetin 3-D-galactoside, baicalin, isorhamnetin and rhamnetin, respectively. Mean recoveries ranged from 66% to 72% for the HPLC-MS analysis. Reproducibility was estimated by the relative standard deviation (RSD) which ranged between 2.21 and 3.93%. Five flavonoids were found to be present in G.biloba leaves. The developed method was readily applied to quantify the flavonoids in some commercially available G.biloba leaves. © 2016, Japanese Society for Food Science and Technology.


Bian Y.,Jinzhong University | Qu X.,Jinzhong University
Organic and Biomolecular Chemistry | Year: 2016

A new acyl-acyl exchange reaction has been developed for the formation of aryl esters from primary aryl amides. The reaction could occur under mild reaction conditions with catalytic quantities of K2CO3, and could afford moderate to good yields of the desired products. © The Royal Society of Chemistry 2016.


Su Y.-L.,Jinzhong University
Modern Food Science and Technology | Year: 2013

The extraction of Pleurotus eryngii polysaccharides in two-phase aqueous system was investigated. The effects of PEG molecular weight, and concentrations of (NH4)2SO4 and PEG on the yield of Pleurotus eryngii polysaccharides were studied The results showed that the optimum conditions were as follows: concentration of PEG4000 21.33% and concentration of (NH4)2SO414%, under which partition coefficient of polysaccharide could reach 1.9529~2.0152 and the yield coefficient could reach 60.58~62.82 %.


Cailin L.,Jinzhong University
International Journal of Security and its Applications | Year: 2016

The economic situation highlights the significant role of the application of computer in human society since the 21st century, especially since 2015. This thesis probes into the security risk propagation of immune mechanism under complex network background. Focusing on the issue of network security under network background, the thesis deploys the analysis by adopting the mechanism model of immune mechanism, immunizing parts of the nodes, establishing stochastic immune mechanism of security risk and introducing stochastic immune mechanism propagation model of security risk. To further study the security risk propagation of immune mechanism under complex network background, the thesis presents the model rules, introduces the security risk acquaintance immune mechanism and establishes models of acquaintances immune mechanism. Finally, attributing to the simulation experiments, the simulation results, the characteristics of security risk propagation model, and the study of stochastic immune mechanism propagation model and acquaintance immune mechanism stochastic model, the thesis reaches the conclusion that at the initial stage of propagation, the die-out rate of the security risk is inversely proportional to the propagation rate. © 2016 SERSC.


Wang D.,Jinzhong University | Zheng Y.,Beijing Jiaotong University
Guangxue Xuebao/Acta Optica Sinica | Year: 2011

Dispersion of fiber may broaden the pulse width and lead to error, which must be avoided in optical communications. Using the finite element method (FEM) and considering the material dispersion of SiO2, the mode field, the effective index of fundamental mode and the dispersion property of double-cladding photonic crystal fiber (PCF) with circular arrangement are numerically simulated. Results show that the distance between large air holes and small air holes of the first layer and the diameter of large air holes determine the shape of dispersion curve when the distance and diameter of small air holes are unchanged. As some dispersion-compensating fiber, the effective mode refractive index has a transition at a wavelength, thus flattened dispersion can be realized. For example, when diameter d1=3.1 μm, d2=1 μm, distance Λ1=5 μm and Λ2=4 μm, within the wavelength range of 1.22~1.6 μm, the difference between the maximun and minimum of dispersion is less than 4 ps/(nm·km).


Liu H.,Jinzhong University
Metallurgical and Mining Industry | Year: 2015

To gain the fault information and determine the fault position, monitoring point should be selected properly, otherwise, it usually fails to fulfill the task effectively and accurately in monitoring and diagnosing the gearbox. A method based on sampling point optimization and features fusion is proposed to improve the classification accuracy of the gearbox fault diagnosis . First the vibration signal of gearbox is processed by empirical mode decomposition, energy characteristic parameters based on empirical mode decomposition are extracted as the fault feature vector, and the decision table is established according to the gearbox fault mechanism and Rough Sets Theory. Then a attributes discretization algorithm based on PSO is put forward to discrete decision table, a method based on the discernibility matrix and attribute frequency is presented to calculate the minimal attribute reduction sets without computing core attribute. The most sensitive signal monitoring point is achieved through analyzing the final reduction sets. Finally, fault diagnosis system based on rough sets theory and support vector machine is constructed, the classification result is consistent with that of the sampling point optimization based on attributes reduction obviously. The experiment results show the method is effective and could improve the gearbox fault diagnosis performance, which provides a relatively generic solution for the similar mechanical system. © Metallurgical and Mining Industry, 2015.


Wang D.,Jinzhong University | Zheng Y.,Beijing Jiaotong University
Guangxue Xuebao/Acta Optica Sinica | Year: 2013

Using the finite element method, the dispersion property, mode area and nonlinear coefficient are numerically simulated by artificially choosing the parameters of the proposed novel holey fiber. The results show that the novel fiber not only has a relatively simple structure, but also has better dispersion property. By optimizing the structure parameters, a flattened dispersion holey fiber with three zero-dispersion wavelengths (λ=1.0 μm, λ=1.53 μm, λ=1.81 μm) in the 900 nm wavelength range has been designed. These results can be used to guide the design of novel holey fiber.


Wang D.,Jinzhong University | Zheng Y.,Beijing Jiaotong University
Guangxue Xuebao/Acta Optica Sinica | Year: 2012

Using the finite element method (FEM), the mode area, confinement loss and dispersion property of a novel microstructured optical fiber (MOF) with double-cladding structure are numerically simulated, analyzed and compared with those of traditional MOF. Results show that the fiber not only has a novel structure but also has better dispersion performance than the traditional photonic crystal fiber. Through rational optimization, several flat dispersion MOFs with large mode area in the 500 nm wavelength range are designed. The novel fiber proposed will have some reference value to the subsequent theoretical study and manufacture.


Yan H.X.,Jinzhong University
Advanced Materials Research | Year: 2014

We simulates the thermal load of Shanxi Xinhua Printing Factory by using the software of DeST. Through choosing different parameters, it obtained that roofing materials have a great impact on the whole heat load system, wall window ratio and wall materials is very small. The result is of great significance to the construction of energy-efficient design of new plant. © (2014) Trans Tech Publications, Switzerland.

Loading Jinzhong University collaborators
Loading Jinzhong University collaborators