Changzhou Entry Exit Inspection and Quarantine Bureau

Changzhou, China

Changzhou Entry Exit Inspection and Quarantine Bureau

Changzhou, China
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Yu N.,Nanjing Agricultural University | Liu Y.,Nanjing Agricultural University | Wang X.,Nanjing Agricultural University | Li J.,Changzhou Entry Exit Inspection and Quarantine Bureau | And 2 more authors.
Pesticide Biochemistry and Physiology | Year: 2017

Nicotinic acetylcholine receptor (nAChR) subunits are encoded by a large multigene family and generate a large number of pentameric receptors with various properties. At present, nematode species, such as Caenorhabditis elegans, have the largest number of nAChR subunits. In this study, two nAChR subunits (Bxy-Unc-38 and Bxy-Unc-29) were cloned from Bursaphelenchus xylophilus, a fatal nematode pest on pine trees causing pine wilt disease. When Bxy-Unc-38 and Bxy-Unc-29 were co-expressed in Xenopus oocytes, constructed functional nAChRs showed agonist responses to acetylcholine and imidacloprid, a neonicotinoid insecticide. When complementary RNAs (cRNAs) of Bxy-Unc-38 and Bxy-Unc-29 were injected at different ratios, the assembled nAChRs showed different pharmacological subtypes, especially in terms of the sensitivity to imidacloprid and another two neonicotinoids. At cRNA ratios 1:1 and 1:5 (Bxy-Unc-38: Bxy-Unc-29), nAChRs showed low sensitivity to test neonicotinoids, which were partial agonists on the receptors. In contrast, at cRNA ratio 5:1, the three test neonicotinoids were full agonists and showed much higher potency compared to that on the receptors with cRNA ratio 1:1 and 1:5. For example, EC 50 values of the three neonicotinoids on the receptors with cRNA ratio 1:5 were 170-222 times of those of receptors with cRNA ratio 5:1. The results showed that the subunit stoichiometry of Bxy-Unc-38/Bxy-Unc-29 receptor dramatically affected the agonist potency of neonicotinoids, and even altered the action property. Due to the high sensitivity of the constructed nAChRs at cRNA ratio 5:1, the construct would serve as an important model to study the interaction between invertebrate nAChRs and neonicotinoids. © 2017 Elsevier Inc.


Xu S.,Nanjing University of Science and Technology | Liu J.,Changzhou Entry Exit Inspection and Quarantine Bureau | Cao W.,Nanjing University of Science and Technology | Li Y.,Nanjing University of Science and Technology | Cao W.,North University of China
Powder Technology | Year: 2017

In this study, in order to reveal the temperature rising characteristic and mechanism of coal dust, “Godbert-Greenwald” furnace test apparatus was chosen to test the minimum ignition temperature (MIT) of dust/air mixtures. Results show that the MIT was in the range of (560–570) °C. Meanwhile, TG/DTG-QMS-FTIR was used to perform real-time and continuous analysis on temperature rising process. Thermal analysis kinetics obtained from TG/DTG shows that the coal dust combustion process consists of two stages — low-temperature stage and high-temperature stage. Furthermore, a detailed discussion on the process was also made based on the real-time evolvement of gaseous products, which was detected by QMS-FTIR on a mechanism level. The experimental results show that the main gaseous products evolved from the coal dust combustion are H2O, CO2, H2, CO and CH4, whereas the higher molecule-weight hydrocarbons (CxHy) are less. © 2017 Elsevier B.V.


Qian J.,Changzhou Entry Exit Inspection and Quarantine Bureau | Zhou Z.,Hohai University | Wang Y.,Hohai University | shao T.,Hohai University | Zhang J.,Hohai University
Applied Mechanics and Materials | Year: 2013

In order to measure the magnetic field around electronic products, household appliances and industrial electrical equipment, this paper puts forward a new method which makes use of electromagnetic coupling design based on three-axis electromagnetic leakage. This method can overcome the disadvantage of traditional single-axis measurement which needs to get the total magnetic field after several times' measurement. This paper designs three-axis electromagnetic leakage detector for circuit measurement, which is proved to be correct after circuit measurement experiment. It can easily detect 30-2K Hz leakage magnetic field of low frequency generated from electrical appliances products.Introduction. © (2013) Trans Tech Publications, Switzerland.


Qian J.S.,Changzhou Entry Exit Inspection and Quarantine Bureau | Zhang J.B.,Hohai University
Applied Mechanics and Materials | Year: 2014

With more and more electronic products used in daily life, as well as people attach great importance to our survival environment, people are more and more concerned about electromagnetic leakage pollution generated from electronic products. So the study of electromagnetic leakage detector that can rapidly and accurately detect the electromagnetic leakage in electronic products is significant. In this paper, we design a fast and effective 3-D electromagnetic leakage detector, which using three hollow induction coils which are mutually vertical between each other to obtain the intensity of electromagnetic field. With this instrument, the intensity in three directions can be tested at the same time. Tests revealed that electromagnetic leakage detector can easily measure the 3-D intensity of electromagnetic leakage generated from low frequency electronic products. It provides an important basis for inspection department to detect electromagnetic leakage in electronic products. © (2014) Trans Tech Publications, Switzerland.


Song X.,Changzhou Entry Exit Inspection and Quarantine Bureau | Zhou Y.,Changzhou Entry Exit Inspection and Quarantine Bureau | Li L.,Shanghai Institute of Technology
Progress in Chemistry | Year: 2014

Core-shell metal-organic frameworks (MOFs) composed of MOFs as core (or shell) and another material, such as MOFs, carbon, inorganic compounds and organic polymers, as shell (or core), are a typical class of multifunctional MOFs composites. Because of the combination of the properties of core and shell materials, core-shell MOFs have better performances, such as increasing framework stability, selective separation and gas sorption, than the core or shell materials. Therefore, core-shell MOFs have high potentials for industrial applications. In this paper, the research progress of core-shell MOFs in recent years is reviewed. Synthesis methods and applications of variously structural core-shell MOFs, such as MOF@MOF, MOF@carbon, metal oxide@MOF, and polymer @MOF are introduced. Besides, the future development of core-shell MOFs is prospected.


Dou M.-C.,Changzhou Entry Exit Inspection and Quarantine Bureau | Deng J.,Wuxi Entry Exit Inspection and Quarantine Bureau | Lai G.-Z.,Wuxi Entry Exit Inspection and Quarantine Bureau | Yao J.,Wuxi Entry Exit Inspection and Quarantine Bureau
Wool Textile Journal | Year: 2014

The down-proof property is one of the important properties of feather and down products, scientific and effective testing method and equipment are the key contents to research the down-proof property of fabrics. The paper describes the main methods of testing the down-proof property of fabrics: trumble test, rubbing test and impact test, and according to the Europen standard-impact test, a new impact test instrument is developed. The paper introduces the basic structure, the working principle and the design plan of the instrument, and compares the different laboratory test results to verify the feasibility of the instrument. The results show no significant difference between the test data of the laboratory, and it shows that the instrument can effectively test the down-proof property of fabrics.


Yin R.-L.,Nanjing University of Science and Technology | Chen L.-P.,Nanjing University of Science and Technology | Chen W.-H.,Nanjing University of Science and Technology | Wu K.,Changzhou Entry Exit Inspection and Quarantine Bureau | And 3 more authors.
Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica | Year: 2016

Thermal analysis calorimeters can be used with different temperature control modes. Dynamic, isothermal, isoperibolic, and adiabatic modes are commonly used. A kinetic compensation effect was discovered when the kinetic parameters were calculated using the Arrhenius equation, based on dynamic and isothermal data. To determine whether the kinetic compensation effect existed in adiabatic mode, accelerating rate calorimetry (ARC) and differential scanning calorimetry (DSC) were used to obtain thermal decomposition curves of dicumyl peroxide (DCP), 40%(w) DCP in ethylbenzene, glucose, and 45% (w) glucose in water. The apparent activation energies (E) and pre-exponential factors (A) were calculated based on the Arrhenius rate constant. An obvious kinetic compensation effect was observed in a plot of lnA vs E for a given sample at different concentrations or for the same set of ARC data analyzed with different reaction orders n. Although the calculated lnA and E values using the dynamic differential scanning calorimetry data were usually lower than those using the adiabatic ARC data, a significant kinetic compensation effect existed between the two sets of results. This result suggested that the kinetic compensation effect existed between the activation energy and pre-exponential factor in reactions with the same or similar reaction mechanisms, regardless of the temperature control mode. © Editorial office of Acta Physico-Chimica Sinica.


Shen W.,Jiangsu Entry Exit Inspection and Quarantine Bureau | Cao X.,Changzhou Entry Exit Inspection and Quarantine Bureau | Liu Y.,Jiangsu Entry Exit Inspection and Quarantine Bureau | Zhang R.,Jiangsu Entry Exit Inspection and Quarantine Bureau | And 4 more authors.
Chinese Journal of Chromatography (Se Pu) | Year: 2012

A method was established for the determination of 17 pyrethroid pesticide residues in vegetables using QuEChERS (quick, easy, cheap, effective, rugged and safe) clean-up method and gas chromatography-mass spectrometry (GC-MS) with negative chemical ionization (NCI). The pyrethroid pesticides in the sample were extracted with acetonitrile. After QuEChERS clean-up with a mixture of primary secondary amine and graphitized carbon black packings, the extract was analyzed by GC-NCI-MS in selected ion monitoring (SIM) mode. An isotope internal standard of cypermethrin was employed to the quantification. The limits of quantification ranged from 0 02 to 5 μg/kg. The recoveries of the pyrethroid pesticides spiked in three different matrixes (peas, broccoli and Chinese onion green) at four spiked levels of 10, 20, 30 and 100 μg / kg were from 71 0% to 139 0%, and the relative standard deviations were less than 12 8%. This method can be used as a conclusive evidence method of the 17 pyrethroid pesticide residues in vegetables.


Zhang H.,Jiangsu University | Zhou Y.,Changzhou Entry Exit Inspection and Quarantine Bureau | Song X.,Jiangsu University
Progress in Chemistry | Year: 2015

Metal-organic frameworks (MOFs) are a class of crystalline coordination-based compounds in which metal ions (or metal clusters) are bridged via multitopic organic ligands to form infinite network structures. The organic ligands and metal clusters in the structures of MOFs could be served as carbon source and metal source, respectively. Fabrication of advanced functional materials from MOF precursors becomes one of the most popular research topics in MOFs chemistry and functional materials field. In this paper, the research progress of advanced functional materials derived from MOFs in recent years is reviewed. Synthesis methods of carbon materials (e. g. nanoporous carbon, carbon nanodots, carbon nanotubes), metal oxide nanomaterials (e. g. monometal oxide: Fe2O3, ZnO, Co3O4, MgO, In2O3, multimetal oxide nanocomposites: Gd2O3/Eu2O3, Fe2O3@TiO2), and metal oxide/carbon nanocomposites (e. g. Fe2O3/C, ZnO/C) derived from MOFs are introduced. The applications of these advanced functional materials in the fields such as supercapacitor, oxygen reduction reaction (ORR) catalyst, hydrogen storage, CO2 capture and photocatalyst of photocatalytic hydrogen production are presented. Besides, an outlook for future development of advanced functional materials derived from MOFs is given. ©, 2015, Chinese Academy of Sciences. All right reserved.


Dou M.-C.,Changzhou Entry Exit Inspection and Quarantine Bureau | Wu W.-Y.,Changzhou Entry Exit Inspection and Quarantine Bureau | Zhu W.-J.,Changzhou Entry Exit Inspection and Quarantine Bureau
Wool Textile Journal | Year: 2011

The feather and down penetration problems of the products have great impact to the producers and consumers, scientific and effective testing method and equipment are the key contents to research the down-proof properties of fabrics. Starting from the principle of feather and down penetration, the paper describes the main methods of testing the down-proof properties of fabrics, and based on the testing instruments, all of the testing methods are divided into three classifications; trumble test, rubbing test and impact test. According to the comparison of testing principle, testing instruments, operating rules and results evaluation, the paper describes the advantages and disadvantages of the testing methods, and analyzes the main problems of the testing methods and gives some suggestions about the technical indexes.

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