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Qin Y.,Kunming University of Science and Technology | Zhang Z.,Kunming University of Science and Technology | Li L.,South China University of Technology | Chen C.,Kunming University of Science and Technology | And 2 more authors.
Food Chemistry

Indocalamus tesselatus is one of the most popular packing materials in China. Heavy metals in Chinese I. tesselatus samples have received great interest because they are related to health. A simple and fast method for the determination of Pb, Cd, Mn, Ni, Cr, As, Hg, Cu and Zn, by inductively coupled plasma orthogonal acceleration time-of-flight mass spectrometry (ICP-oa-TOF-MS), following microwave closed vessel digestion of samples, was proposed. The method was validated using standard reference material (GBW 07605-Tea). Samples of I. tesselatus from five different regions of China were analysed using the proposed method. Heavy metals contents from different regions were found at different levels. Their low contents of heavy metals showed that collection areas were not polluted and all collected I. tesselatus samples could be unreservedly used as food packing materials without any health risk. © 2013 Elsevier Ltd. All rights reserved. Source

Yu Q.,Guangdong University of Technology | Gao Q.,Guangdong University of Technology | Bi M.F.,Guangdong University of Technology | Yu L.,Guangdong University of Technology | And 3 more authors.
Advanced Materials Research

Wood vinegar, as one of the main products of pyrolysis of wood, is very useful, but its system is not stable, easy to produce surface floating oil and precipitation. By test, it was found that 200 mg cetyl trimethyl ammonium bromide (CTMAB) was added to a liter of wood vinegar, and was stirred for 2 hours, wood vinegar surface floating oil and precipitation could be greatly reduced. It would provide useful data for the subsequent development of the wood vinegar. © (2013) Trans Tech Publications, Switzerland. Source

Yan S.,CAS South China Sea Fisheries Research Institute | Lai G.,Nansha Entry Exit Inspection and Quarantine Bureau | Li L.,Nansha Entry Exit Inspection and Quarantine Bureau | Xiao H.,Nansha Entry Exit Inspection and Quarantine Bureau | And 3 more authors.
Food Chemistry

In the present study, we employed a DNA barcoding approach to authenticate the species of fish imported via one port in China. The fish were identified as smallmouth scad based on morphological characteristics, Alepes apercna (Perciformes, Carangidae), but were labeled as Rastrelliger brachysoma (Perciformes, Scombridae). Fragments of the partial mitochondrial cytochrome c oxidase 1 (COI) gene were sequenced from 12 specimens, and their phylogenetic relationship was subsequently examined. The phylogenetic analysis demonstrated that all of the individuals formed a monophyletic cluster with high bootstrap values and were placed in a sister group with the ancestor of Alepes vari and Alepes melanoptera. The K2P genetic distances at an intraspecific level were significantly smaller than those at an interspecific level. Our results indicated that the fish were A. apercna, rather than R. brachysoma, which confirms the morphological analysis. This study presents a practical demonstration of the use of DNA barcoding to prevent fraud in international trade. © 2016 Elsevier Ltd. All rights reserved. Source

Wang M.,Sun Yat Sen University | Yan S.,Sun Yat Sen University | Li M.,CAS South China Sea Fisheries Research Institute | Zhao M.,Nansha Entry Exit Inspection and Quarantine Bureau | Yang T.,Sun Yat Sen University
Mitochondrial DNA

In the present study, the complete mitochondrial genome of the masked spinefoot Siganus puellus (Perciformes, Siganidae) is determined. The entire sequence is 16,504 bp in length, including 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes and 1 control region. Gene organization and gene order are similar to those found in other rabbitfishes. Apart from ND6 and eight tRNA genes, all other mitochondrial genes are encoded on the heavy strand. Overall base compositions of mitogenome are 28.6% of A, 29.5% of C, 25.6% of T and 16.3% of G. The overall mean genetic distances of 13 protein-coding genes among three Siganus species with known complete mitogenome ranges from 0.076 (COXII) to 0.154 (ATP6), higher than the divergence (0.107) of control region, which implies that ATP6 gene may be more appropriate for population genetic structure analyses of Siganus species. © 2014 © 2014 Informa UK Ltd. Source

Chen H.-Y.,Ohio State University | Chen H.-Y.,South China Agricultural University | Hong C.-D.,Nansha Entry Exit Inspection and Quarantine Bureau | van Achterberg C.,Northwest University, China | Xu Z.-F.,South China Agricultural University

A new species of the genus Pseudomegischus van Achterberg, Pseudomegischus yunnanensis sp. n., is described and illustrated from Yunnan Province, China. This is the second species of the genus reported from China. A modified section of the identification key to species of Pseudomegischus is added to include the new species. © Hua-yan Chen et al. Source

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