Meizhou, China

Jiaying University

www.jyu.edu.cn
Meizhou, China

Jiaying University is a public provincial undergraduate university based in Meizhou City in Guangdong Province, southern China.The university grew out of the Women's Normal School established in 1913 and received its name because Meizhou was known as Jiaying during the Qing Dynasty . Wikipedia.

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A sensitive and high-throughput method based on dispersive solid phase extraction (dSPE) coupled with ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) was developed for the simultaneous determination of sixteen industrial pollutants in infant formula milk powder. A two-step extraction method, direct extraction with acetonitrile followed by salting out-acetonitrile extraction, was adopted in the extraction of target analytes in milk powder. After that, the extraction solution was concentrated and subsequently purified by dSPE. Sixteen target analytes were separated on a Phenomenex kinetex C18 column with the mobile phase of a mixture of methanol and 5 mmol L-1 ammonium acetate water solution, detected by MS/MS under multiple reaction monitoring and quantified by an internal standard method. The method was validated in terms of the sensitivity, linearity, recovery and precision, and matrix effect. The results indicated that favorable linear relations (r > 0.99) were obtained for all analytes at their respective concentration ranges and their limits of quantification (LOQs, S/N = 10) were in the range of 0.02-0.80 μg kg-1. The mean recoveries were calculated at three spiked levels and the values were found between 80.4 and 114% with relative standard deviation (RSD, n = 6) ranging from 3.0-12.2% and the inter-day precision (n = 5) ranging from 6.2-13.0%. The developed method is accurate and rapid and suitable for the simultaneous determination of bisphenols, alkylphenols and perfluorinated compounds in infant formula milk powder. © 2017 The Royal Society of Chemistry.


Tang C.-B.,Jiaying University
Acta Crystallographica Section E: Structure Reports Online | Year: 2010

The title hydrazone compound, C15H14N 2O2, was prepared by the condensation of 4-hy-droxy-benzaldehyde with 2-methyl-benzohydrazide in methanol. The dihedral angle between the two benzene rings is 42.3 (2)°. In the crystal structure, molecules are linked by inter-molecular O - H⋯O, O - H⋯N and N - H⋯O hydrogen bonds, forming a three-dimensional framework.


Tang C.-B.,Jiaying University
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In the title compound, C15H15N3O, the dihedral angle between the pyridine and benzene rings is 36.3 (2)°. In the crystal, molecules are linked through intermolecular N -H⋯O hydrogen bonds, forming chains along the b axis.


Liang W.Y.,Jiaying University
Applied Mechanics and Materials | Year: 2014

Flash is an electronic animation that can be watched on a computer or monitor with a microprocessor. It is rich in content and can simultaneously display images, sound and text, its data is very few, generally speaking, the amount of data of an animated video accounts for 1/ 4 to 1/ 10 of a physical video with the same size and definition. Its development brings opportunities for modern educational technology curriculum of higher normal university, making it present a more rich content and form. The relevant overviews of online virtual laboratory are first discussed in this paper, and then is its construction process. © (2014) Trans Tech Publications, Switzerland.


A new Eu(III) complex, Eu(III)(DBM) 3BIOQ, has been synthesized with dibenzoylmethane (DBM) as the first ligand and 2-(benzimidazol-2-yl)-8- octyloxyquinoline (BIOQ) as the second ligand. The stability of the complex was analysed by DSC-TG. The results show that the Eu(III) complex has a relatively high thermal stability with a melting point of 235 °C and a decomposition temperature (onset) of 252 °C. The fluorescence properties of the compound were also investigated. The fluorescence results reveal that the as-prepared complex shows the characteristic maximum emission spectra of Eu(III) at 611 nm (® ex = 350 nm). In addition, the photoluminescence spectrum of the complex in the solid state exhibits a single and symmetrical emission band at 611 nm, with a full width at half-maximum of 4.7 nm, showing high colour purity. This finding indicates the possibility for the development of brighter red luminescent materials. Copyright © 2011 John Wiley & Sons, Ltd.


Zhong Q.-H.,Jiaying University
European Physical Journal B | Year: 2010

We have presented a theoretical calculation of the differential cross section (DCS) for the electron Raman scattering (ERS) process associated with the surface optical (SO) phonon modes in semiconductor quantum dots (QDs). We consider the Fröhlich electron-phonon interaction in the framework of the dielectric continuum approach. Different scattering configurations are discussed and the selection rules for the processes are also studied. Singularities are found to be sensitively size-dependent and by varying the size of the QDs, it is possible to control the frequency shift in the Raman spectra. A discussion of the phonon behavior for QDs with large and small size is presented. The numerical results are also compared with that of experiments. © 2010 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.


Zhong X.-Y.,Jiaying University
Procedia Engineering | Year: 2011

Weka is a data mining platform based on Java with open source code, which gathers many machine learning algorithms to mine data, including data pretreatment, classification, cluster class, association rule mining and visual interactive page. The server will record massive web log files when user visits the website, each item of the files records related information of visitor, such as the time, IP address, action, request pages as well as the state and so on. The system mines web log on weka platform, it obtains the custom of different user to visit the website by processing and analyzing primary data, and mines unusual information, and provides the reference for the policy decision and construction of website. Simulation results show that, applying weka in web log mining, will obtain frequent model which user visits the website, optimize the website structure, and make convenient to build intelligence website. © 2011 Published by Elsevier Ltd.


Xu H.,Jiaying University
Protein and Peptide Letters | Year: 2010

Flavonoids, also called vitamin P, are widely distributed in plants fulfilling many functions. Yeast α- glucosidase (YAGH; EC 3.2.1.20), as extensively used target protein for screening bioactive compounds from medicine plants, was selected to explore the possible mechanisms of multiple biological function of flavonoids. The results in this study indicated that flavonoids, as mixed-type inhibitors, quenched the intrinsic fluorescence of YAGH by a mixed fluorescence quenching mechanism. The interaction information between flavonoids and YAGH was analyzed using a flexible docking method (AutoDock) and showed that 3', 4' dihydroxyl groups of B ring and 3-OH of C ring played a more important role in the inhibition activity than other hydroxyl groups, because the 3', 4' dihydroxyl groups of B ring directly interacted with the active-site residues of YAGH to inhibit enzyme activity and 3-OH of C ring seemed to be necessary to maintain the proper binding orientation of flavonoid molecules, thereby making the hydroxyl groups of B ring interact with active-site residues tightly in the hydrophobic pocket of YAGH. The results supply a basis for understanding the mechanisms of multiple biological functions of flavonoids. © 2010 Bentham Science Publishers Ltd.


The present invention relates to the technical field of -sitosterol drugs and provides a drug sustained release agent based on -sitosterol and a preparation method thereof. The drug sustained release agent based on the -sitosterol is applied to drugs with the -sitosterol as a main drug component and is prepared from the components including a drug carrier, a hydrophilic gel material, a erodible matrix material and an insoluble matrix material, wherein the drug carrier is a -cyclodextrin-polyamide-amine dendrimer composites, -sitosterol is from a plant raw material, and a host-guest inclusion complex is composed of the main drug component and the drug carrier according to the mass ratio of 0.1:0.1-0.1:5. A preparation method comprises the following steps: preparing the inclusion complex, mixing auxiliaries, carrying out compression moulding and the like. The drug sustained release agent based on -sitosterol has the characteristics of stable drug concentration, high biological activity, good drug solubility and long acting effect.


The present invention relates to the technical field of oleanolic acid drugs and provides a drug sustained release agent based on oleanolic acid and a preparation method thereof. The drug sustained release agent based on the oleanolic acid is applied to drugs with the oleanolic acid as a main drug component and is prepared from the components including a drug carrier, a hydrophilic gel material, a erodible matrix material and an insoluble matrix material, wherein the drug carrier is -cyclodextrin-chitosan composites, wherein the oleanolic acid is from a plant raw material, and a host-guest inclusion complex is composed of the main drug component and the drug carrier according to the mass ratio of 0.1:0.1-0.1:5. A preparation method comprises the following steps: preparing the inclusion complex, mixing auxiliaries, carrying out compression moulding and the like. The drug sustained release agent based on oleanolic acid has the characteristics of stable drug concentration, high biological activity, good drug solubility and long acting effect.

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