Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute

Urunchi, China

Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute

Urunchi, China
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Yang S.,CAS Xinjiang Technical Institute of Physics and Chemistry | Chen L.,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute | Wang C.,CAS Xinjiang Technical Institute of Physics and Chemistry | Wang C.,Shihezi University | And 2 more authors.
Journal of Colloid and Interface Science | Year: 2017

Surface free energy and roughness are two predominant factors governing the hydrophilicity/hydrophobicity of materials. This paper reported the surface roughness induced hydrophobicity of graphene foam by incorporating silica nanoparticles onto graphene sheet via a sol-gel method and subsequent modification using silane. Various techniques were employed to characterize the morphology, composition and surface properties of sample. The results showed that the as-prepared graphene foam exhibited a superhydrophobic surface with a high water contact angle of 156°, as well as superoleophilicity with excellent adsorption capacities for a variety of oil compounds. Benefiting from the integration of enhancement on the surface roughness and reduction on the surface free energy of material, the graphene foam developed in this study had the capability to effectively separate oil-water mixture with excellent stability and recyclability. © 2017 Elsevier Inc.


PubMed | Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Urumqi Jiangqi Agriculture Development Co. and University of Macau
Type: Journal Article | Journal: Journal of separation science | Year: 2016

Coreopsis tinctoria, also called snow chrysanthemum in China, is a flower tea material that has been reported to possess excellent pharmacological properties such as antioxidant and antidiabetic activities. The chemical characteristics of different parts (flowers, buds, seeds, stems, and leaves) of C. tinctoria were investigated based on microwave-assisted extraction and the simultaneous determination of 13 major active compounds by high-performance liquid chromatography, including taxifolin-7-O-glucoside, chlorogenic acid, (R/S)-flavanomarein, isocoreopsin, quercetagetin-7-O-glucoside, isookanin, 5,7,3,5-tetrahydroxyflavanone-7-O-glucoside, marein, 3,5-dicaffeoylquinic acid, coreopsin, okanin, 5,7,3,5-tetrahydroxyflavanone, and N(1) ,N(5) ,N(10) ,N(14) -tetra-p-coumaroylspermine. Chemometric analysis based on the contents of investigated compounds from 13 samples showed that C. tinctoria and the related flower tea materials, Chrysanthemum morifolium cv Hangju and Gongju, were in different clusters, and different parts (flowers, buds, seeds, stems, and leaves) of C. tinctoria were obviously different. This study is helpful for the quality control and pharmacological evaluation of different parts from C. tinctoria and its related products.


PubMed | Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Urumqi Jiangqi Agriculture Development Co., University of Macau and China Science and Technology Exchange Center
Type: | Journal: Journal of chromatography. A | Year: 2016

Snow chrysanthemum (Coreopsis tinctoria Nutt.), a world-widely well-known flower tea material, has attracted more and more attention because of its beneficial health effects such as antioxidant activity and special flavor. In this study, a high performance liquid chromatography coupled with diode array detection and mass spectrometry (HPLC-DAD-MS) and 2,2-azinobis(3-ethylbenzthiazoline-sulfonic acid)diammonium salt (ABTS) based assay was employed for comparison and identification of antioxidants in different samples of snow chrysanthemum. The results showed that snow chrysanthemum flowers possessed the highest while stems presented the lowest antioxidant capacities. Fourteen detected peaks with antioxidant activity were temporarily identified as 3,4,5,6,7-pentahydroxyflavanone-O-hexoside, chlorogenic acid, 2R-3,4,8-trihydroxyflavanone-7-O-glucoside, flavanomarein, flavanocorepsin, flavanokanin, quercetagitin-7-O-glucoside, 3,5,5,7-tetrahydroxyflavanone-O-hexoside, marein, maritimein, 1,3-dicaffeoylquinic acid, coreopsin, okanin and acetyl-marein by comparing their UV spectra, retention times and MS data with standards or literature data. Antioxidants existed in snow chrysanthemum are quite different from those reported in Chrysanthemum morifolium, a well-known traditional beverage in China, which indicated that snow chrysanthemum may be a promising herbal tea material with obvious antioxidant activity.


PubMed | Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Qinghai University for Nationalities, National Institutes for Food and Drug Control, Beijing University of Chinese Medicine and 2 more.
Type: | Journal: Carbohydrate polymers | Year: 2015

Water-soluble polysaccharides from 51 batches of fruits of L. barbarum (wolfberry) in China were investigated and compared using saccharide mapping, partial acid hydrolysis, single and composite enzymatic digestion, followed by polysaccharide analysis by using carbohydrate gel electrophoresis (PACE) analysis and high performance thin layer chromatography (HPTLC) analysis, respectively. Results showed that multiple PACE and HPTLC fingerprints of partial acid and enzymatic hydrolysates of polysaccharides from L. barbarum in China were similar, respectively. In addition, results indicated that -1,3-glucosidic, -1,4-galactosiduronic and -1,5-arabinosidic linkages existed in polysaccharides from L. barbarum collected in China, and the similarity of polysaccharides in L. barbarum collected from different regions of China was pretty high, which are helpful for the improvement of the performance of polysaccharides from L. barbarum in functional/health foods area. Furthermore, polysaccharides from Panax notoginseng, Angelica sinensis, and Astragalus membranaceus var. mongholicus were successfully distinguished from those of L. barbarum based on their PACE fingerprints. These results were beneficial to improve the quality control of polysaccharides from L. barabrum and their products, which suggested that saccharide mapping based on PACE and HPTLC analysis could be a routine approach for quality control of polysaccharides.


Jian L.-J.,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute | Chang J.-M.,Xinjiang Medical University | Li G.-R.,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute
Chinese Pharmaceutical Journal | Year: 2013

OBJECTIVE: To isolate and purify the polysaccharide from Saccharum Alhagi, and to clarify its chemical structure. METHODS: Water extracting-alcohol precipitating method was applied to extract polysaccharide from Saccharum Alhagi. Macro-porous adsorption resin chromatography, DEAE cellulose chromatography and Sephadex gel chromatography were applied to fractionalize and purify the polysaccharide. The homogeneity and molecular weight of the polysaccharide were determined by gel filtration. The monosaccharide composition of the polysaccharide was identified by gas chromatography (GC). Partial acid hydrolysis, periodate oxidation, smith degradation and NMR were used to analyze the chemical structure of the polysaccharide. RESULTS: Polysaccharide fraction AP1-1 was got from Saccharum Alhagi. The analysis results show that APl-1was a homogeneous polysaccharide and its molecular weight was 99.7 × 10. AP1-1 was composed of mannose, glucose, galactose with molar ratio of 1.10:2.19:4.32.The main chain of AP1-1was mainly made up of →4)-β-D-GalpA-(1→, →4)-β-D-Galp-(1→ and →4, 6)-α-D-Glcp-(1 →. The side chain was composed of →6)-α-D-Glcp and 2-OCH3-α-D-Man. CONCLUSION: Saccharum Alhagi polysaccharide AP1-1 is a complicated hetero-polysaccharide with multi-branches.


Long Z.,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute | Xu W.,Xinjiang University | Lu Y.,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute | Qiu H.,CAS Lanzhou Institute of Chemical Physics
Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences | Year: 2016

A new and facile rhodamine B (RhB)-imprinted polymer nanoshell coating for SiO2 nanoparticles was readily prepared by a combination of silica gel modification and molecular surface imprinting. The RhB-imprinted polymers (RhB-MIPs) were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and UV-vis spectroscopy; the binding properties and selectivity of these MIPs were investigated in detail. The uniformly imprinted nanoparticles displayed a rather thin shell thickness (23nm) with highly effective recognition sites, showing homogenous distribution and monolayer adsorption. The maximum MIP adsorption capacity (Q m) was as high as 45.2mgg-1, with an adsorption equilibrium time of about 15min at ambient temperature. Dynamic rebinding experiments showed that chemical adsorption is crucial for RhB binding to RhB-MIPs. The adsorption isotherm for RhB-MIPs binding could also be described by the Langmuir equation at different temperatures and pH values. Increasing temperature led to an enhanced Q m, a decreased dissociation constant (K' d), and a more negative free energy (δG), indicating that adsorption is favored at higher temperatures. Moreover, the adsorption capacity of RhB was remarkably affected by pH. At pH>7, the adsorption of RhB was driven by hydrogen bonding interactions, while at pH<7 electrostatic forces were dominant. Additionally, the MIPs also showed specific recognition of RhB from the standard mixture solution containing five structurally analogs. This method was also successfully employed to determine RhB content in red wine and beverages using three levels of spiking, with recoveries in the range of 91.6-93.1% and relative standard deviations lower than 4.1%. © 2016 Elsevier B.V.


Sun Z.,Xinjiang University | Sun Z.,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute | Hui L.,Xinjiang University | Ran W.,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute | And 2 more authors.
New Journal of Chemistry | Year: 2016

In this work, we demonstrate the design and fabrication of porous nickel oxide nanosheets (NiO NSs). The Ni-based intermediates (Ni(H2O)2[Ni(CN)4]·XH2O) are first prepared via an easy, environmentally friendly, and room temperature solution route. NiO NSs with well preserved morphology are then obtained by annealing treatment of Ni-based intermediates at 300 °C in air. Due to the highly porous nanostructure, NiO NSs have a relatively high specific surface area of 118.2 m2 g-1. When evaluated for capacitive performance, the NiO NSs deliver a high specific capacitance of 527.1 F g-1 at 1 A g-1, and retain a good specific capacitance retention of about 80.2% even at a high current density of 5 A g-1 after 500 charge-discharge cycles. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2016.


Long Z.,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute | Lu Y.,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute | Zhang M.,CAS Lanzhou Institute of Chemical Physics | Qiu H.,CAS Lanzhou Institute of Chemical Physics
Journal of Separation Science | Year: 2014

A seven-channel molecularly imprinted polymer sensor array was prepared and characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, UV-Vis spectroscopy, and nitrogen physisorption studies. The results revealed that the imprinted polymers have distinct-binding affinities from those of structurally similar azo dyes. Analysis of the UV-Vis spectral response patterns of the seven dye analytes against the imprinted polymer array suggested that the different selectivity patterns of the array were closely connected to the imprinting process. To evaluate the effectiveness of the array format, the binding of a series of analytes was individually measured for each of the seven polymers, made with different templates (including one control polymer synthesized without the use of a template). The response patterns of the array to the selected azo dyes were processed by canonical discriminant analysis. The results showed that the molecularly imprinted array was able to discriminate each analyte with 100% accuracy.Moreover, the azo dyes in two real samples, spiked chrysoidin in smoked bean curd extract and Fanta lime soda (containing tartrazine), were successfully classified by the array. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


PubMed | Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute and CAS Lanzhou Institute of Chemical Physics
Type: Journal Article | Journal: Journal of separation science | Year: 2016

A simple one-pot approach based on molecularly imprinted polymer shells dispersed on the surface of silica for simultaneous determination of rhodamine B and dibenzyl phthalate (DBzP) has been developed. Highly dense molecularly imprinted polymer shells were formed in the mixture of acetonitrile and toluene by the copolymerization of methacrylic acid and ethylene glycol dimethacrylate, as well as two templates, rhodamine B and dibenzyl phthalate, directed by the vinyl end groups functional monolayer at surface silica microspheres after 3-methacryloxypropyl trimethoxysilane modification. The obtained imprinted polymer shells showed large average pore diameter (102.5 nm) and about 100 nm shell thickness. The imprinted particles also showed high imprinting factor (


Jian L.-J.,Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute | Chang J.-M.,Xinjiang Medical University | Ablise M.,Xinjiang Medical University | Li G.-R.,Xinjiang Medical University | He J.-W.,Xinjiang Medical University
Journal of Asian Natural Products Research | Year: 2014

The polysaccharide extract (PE) of Uyghur medicinal preparation Alhagi-honey was prepared by water extraction and alcohol precipitation method. The purified polysaccharide AP1-1 was obtained from PE by macroporous adsorption resin chromatography, DEAE cellulose chromatography, and Sephadex gel chromatography; the homogeneity and the molecular weight of AP1-1 were determined by gel filtration; and the acid hydrolysis, periodate oxidation, Smith degradation, and NMR analysis were used to analyze the chemical structure of AP1-1. The result showed that AP1-1 was a homogeneous polysaccharide, whose relative molecular weight was 9.97 × 104. Through high-performance capillary electrophoresis analysis, we found that its molecular structure was composed of mannose, glucose, galactose, and galacturonic acid with a molar ratio of about 1.1:1.9:3.9:2.1. The main chain of AP1-1 was mainly made up of → 4)β-d-GalpA-(1 → 4)β-d-GalpA-(1 → 4)-β-d-Galp-(1 → 4)-β-d-Galp-(1 → 6)-d-Glcp-(1 → 4)-d-Glcp(1 →, while the side chain is composed of → 6)-d-Glcp and 2-CH3-d-Man. © 2014 © 2014 Taylor & Francis.

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