Search

Your search keyword '"Peng, Xiaoli"' showing total 41 results
Start Over Author "Peng, Xiaoli" Publisher elsevier bv
41 results on '"Peng, Xiaoli"'

20. Identification of Plectropomus leopardus, Promicrops lanceolatus and Cromileptes altivelis using species-specific TaqMan real-time PCR

Author

Lin Shuangqing, Xu Qiubei, Peng Xiaoli, and Shuangya Chen

Subjects
Leopardus, Mitochondrial DNA, Aquatic product, biology, Plectropomus, Ecology, 010401 analytical chemistry, Zoology, 04 agricultural and veterinary sciences, biology.organism_classification, 040401 food science, 01 natural sciences, 0104 chemical sciences, 0404 agricultural biotechnology, Real-time polymerase chain reaction, TaqMan, %22">Fish , Identification (biology), Food Science, Biotechnology
Abstract

Plectropomus leopardus , Promicrops lanceolatus and Cromileptes altivelis are high-value groupers in chinese aquatic product market and are substituted by cheaper ones sometimes due to economic profit. In this study, real-time PCR methods for identification of these groupers were developed. Species-specific primers and probes were designed on the basis of cytochrome oxidase I (COI) mitochondrial DNA sequences of groupers and other fishes. The specificity of the real time PCR assays were tested with a total of 51 specimens of fish, meat and poultry. Amplifications were observed in specific species only. The methods developed were accurate and rapid and offered the potential to detect fraudulent or unintentional mislabeling of these species in routine seafood authentication analysis.

Published
2018

23. Local expressions and function of Kiss1/GPR54 in goats' testes

Author

Han, Yanguo, primary, Peng, Xiaoli, additional, Si, Weijiang, additional, Liu, Guiqiong, additional, Han, Yuqing, additional, Jiang, Xunping, additional, Na, Risu, additional, Yang, Liguo, additional, Wu, Jiayuan, additional, E, Guangxin, additional, Zeng, Yan, additional, Zhao, Yongju, additional, and Huang, Yongfu, additional

Published
2020
Full Text
View/download PDF

27. A facile procedure for the synthesis of δ-Na 2 Si 2 O 5 using rice husk ash as silicon source

Author

Deng Miao, Peng Xiaoli, Jinhui Lin, Xiangjun Pei, Guoyong Zhang, and Runqiu Huang

Subjects
Materials science, Scanning electron microscope, Mechanical Engineering, Analytical chemistry, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Microstructure, 01 natural sciences, 0104 chemical sciences, law.invention, Thermogravimetry, symbols.namesake, Mechanics of Materials, law, Transmission electron microscopy, Differential thermal analysis, symbols, General Materials Science, Crystallization, 0210 nano-technology, Thermal analysis, Raman spectroscopy
Abstract

δ-Na2Si2O5, a potential builder in detergents, was prepared from rice husk ash by a simple sintering at 720 °C for 120 min. The sample was characterized by X-ray diffraction (XRD), Raman spectroscopy (Raman), differential thermal analysis (DTA), thermogravimetry (TG), scanning electron microscopy (SEM), transmission electron microscope (TEM), and EDTA titration. The XRD pattern confirmed the crystallization of δ-Na2Si2O5 obtained at 720 °C. The Raman shift at 552 cm−1 and 1052 cm−1 indicated the presence of a layered silicate tetrahedron structure in the sample. The loss of weight when the sample was heated from 120 °C to 516 °C in the TG curve was close to the theoretical weight loss calculated from the reaction formula and a broad exothermic peak at ∼715 °C in the DTA curve demonstrated a phase transformation, consistent with previous reports. The SEM and TEM images indicated the typical structure of δ-Na2Si2O5 crystallization.The sample exhibited an excellent blinding capacity to Ca2+ and Mg2+; the optimal binding capacities were found to be 396 mg/g and 435 mg/g, respectively.

Published
2016

28. Magnetic Fe 3 O 4 @ silica–xanthan gum composites for aqueous removal and recovery of Pb 2+

Author

Mingjie Niu, Wenzhong Zhang, Ceng Zeng, Eva Chmielewská, Wang Jingying, Peng Xiaoli, and Fang Xu

Subjects
Aqueous solution, Materials science, Langmuir adsorption model, Standard enthalpy of formation, Thermogravimetry, symbols.namesake, Colloid and Surface Chemistry, Adsorption, Selective adsorption, medicine, symbols, Composite material, Xanthan gum, medicine.drug, BET theory
Abstract

A magnetic Fe 3 O 4 @ silica–xanthan gum composite was easily fabricated as a hybrid adsorbent for the removal and recovery of aqueous Pb 2+ heavy metal. The natural polymer xanthan gum (XG) was fixed on the surface of the magnetic Fe 3 O 4 microspheres through a sol–gel process. The condensation of XG molecule provided active sites for the selective adsorption of Pb 2+ ions from the aqueous solution, and because the composite is magnetically switchable, the process of solid–liquid separation was convenient. Scanning electronic microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectrometry, thermogravimetry, and BET surface area determination were utilized for the characterization of the composites. The factors affecting Pb 2+ adsorption in a batch mode were studied including the contact time (30–150 min), the pH of the media (2–10), the adsorbent dosage (0.01–0.2 g/20 mL), and the temperature (303–320 K). The Pb 2+ adsorption followed pseudo-second-order kinetics, and the maximum Pb 2+ sorption capacity was 21.32 mg g −1 at 293 K, pH = 6, according to the Langmuir isotherm. The thermodynamic parameters, including the equilibrium constant ( K 0 = 9.848), the standard free energy change (Δ G 0 = −5.774 kJ mol −1 ), the standard enthalpy change (Δ H 0 = 6.133 kJ mol −1 ), and the standard entropy change (Δ S 0 = 39.21 J mol −1 K −1 ) were discussed. The targeted Pb 2+ could be recovered efficiently using 0.05 mol L −1 HCl. Finally, the Fe 3 O 4 @ silica–XG composites were attmepted for removal of Pb 2+ from battery industry wastewater.

Published
2014

29. Silica modified calcium alginate–xanthan gum hybrid bead composites for the removal and recovery of Pb(II) from aqueous solution

Author

Fang Xu, Peng Xiaoli, Wenzhong Zhang, Francesco Pepe, Yifan Wang, and Zhang Shan

Subjects
Thermogravimetric analysis, Materials science, Calcium alginate, Aqueous solution, General Chemical Engineering, Metal ions in aqueous solution, Langmuir adsorption model, General Chemistry, Industrial and Manufacturing Engineering, symbols.namesake, chemistry.chemical_compound, Adsorption, chemistry, symbols, medicine, Environmental Chemistry, Chemical binding, Composite material, Xanthan gum, medicine.drug
Abstract

An organic–inorganic bio-hybrid bead composite was fabricated through a sol–gel reaction by trapping and condensing amorphous silica into the network structures of calcium ion cross-linked alginate (CA)–xanthan gum (XG) gel beads. The reinforced silica/CA–XG composite was characterized by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and surface area measurement. Pb(II) adsorption by the composites was investigated in a batch mode by changing the relevant parameters which included solid/liquid ratio, contact time, pH, temperature, effect of co-existing metal ions and particle size. The analysis of the equilibrium data at 293 K was more appropriate for the Langmuir isotherm model, with maximum adsorption capacity standing at 18.9 mg Pb g−1. It evidenced that Pb(II) adsorption was based on chemical binding process, along with intra-particle diffusion contribution. Experiments carried out at 293 and 313 K enabled the evaluation of the thermodynamic parameters of the adsorption process, namely ΔG0 (−5 kJ mol−1), ΔH0 (7.20 kJ mol−1) and ΔS0 (18.0 J mol−1 K−1); it was revealed as a spontaneous and endothermic process. 0.5 mol L−1 HCl was recommended for composite regeneration and Pb(II) recovery. Fixed bed experiment was attempted for treatment of Pb(II)-bearing battery industrial wastewater with an efficient level of reversible performance through an extended period of time. Overall, the proposed silica/CA–XG composite would be a very promising adsorbent for lead removal and recovery from aqueous solutions, with remarkable advantages in terms of biocompatibility, recyclability, ease of operation and low cost.

Published
2013

Catalog

Books, media, physical & digital resources
See catalog results