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Shi D.,Jilin Agricultural University | Zhang Z.,China Green Food Development Center | Li G.,China Agricultural University | Zhang H.,China Agricultural University | And 2 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2010

Based on 0-15 mm screened municipal solid waste from Beijing Majialou Municipal Solid Waste Transfer Station, the research using closed static technology was conducted in the tunnels of Nan Gong Composting Factory to understand the feasibility of small size municipal solid waste composting and select the optimum heap high of composting. Four treatments were arranged, which had different heap heights namely 2.5, 2.0, 1.5 and 1.0 m, respectively. Samples taken from each treatment after eight day of high temperature composting were analyzed with the maturity indexes including electric conductivity (EC), E4/E6, water soluable carbon (WSC), NH4 +-N, C/N, germination index (GI), value of fecal coliform, which was combined with a fuzzy comprehensive evaluation to evaluate the maturity. The results showed that 0-15 mm municipal solid waste could be composted individually, and the optimum maturity heap heights were 1.5 m and 1.0 m. But the optimum heap height of tunnel composting was 1.5 m when there was more integration.

Wang S.,Shaanxi University of Chinese Medicine | Wang S.,Chinese Institute of Materia Medica | Hao L.-J.,Chinese Institute of Materia Medica | Zhu J.-J.,Chinese Institute of Materia Medica | And 4 more authors.
Zhongguo Zhongyao Zazhi | Year: 2014

Eight compounds from six Chrysanthemum morifolium cv.'Hangju' were determined and multivariate statistics, including principle component analysis (PCA) and partial least squares discriminate analysis (PLS-DA) were used to investigate the potential damaging effect of sulfr-fumigating process. Meanwhile, S, Mn, Fe, Cu, Pb were also detected by using ICP-MS and ICP-OES. In this study, dramatic chemical changes were found that the contents of flavonoid aglycones remarkably increased while those of glycosides and hydroxycinnamoylquinic acids were significantly reduced. The PCA score plots showed six samples were clearly classified into the non-fumigated and sulfur-fumigated types. And according to VIP>1, the most important chemical markers were luteolin, apigenin and luteolin-7-O-glucoside which indicated that the extracted three components might have a marked effect on the discrimination among different group samples. And then, it was found that the residue of sulfur of SHJ were significantly higher than NHJ (P<0.05). The established approach was applied to rapidly discriminate sulfur-fumigated HJ with combining the quantitative chemical analysis and multivariate statistical analysis, and then the result will provide some evidence to evaluat the quality of HJ and control its processing.

Li Y.,Chinese Academy of Agricultural Sciences | Dong F.,Chinese Academy of Agricultural Sciences | Liu X.,Chinese Academy of Agricultural Sciences | Xu J.,Chinese Academy of Agricultural Sciences | And 6 more authors.
Journal of Separation Science | Year: 2010

A simple enantioselective HPLC method was developed for measuring carfentrazoneethyl enantiomers. The separation and determination was accomplished on an amylose tris[(S)-α-methylbenzylcarbamate] (Chiralpak AS) column using n-hexane/ethanol (98:2, v/v) as mobile phase at a flow rate of 1.0 mL/min with UV detection at 248 nm. The effects of mobile-phase composition and column temperature on the enantioseparation were discussed. The accuracy, precision, linearity, LODs, and LOQ of the method were also investigated. LOD was 0.001 mg/kg in water, 0.015 mg/kg in soil and wheat, with an LOQ of 0.0025 mg/kg in water and 0.05 mg/kg in soil and wheat for each enantiomer of carfentrazone-ethyl. SPE was used for the enrichment and cleanup of soil, water, and wheat samples. Recoveries for two enantiomers were 88.4-106.7% with RSDr of 4.2-9.8% at 0.1, 0.5, and 1 mg/kg levels from soil, 85.8-99.5% with the RSDr of 4.4-9.6% at 0.005, 0.025, and 0.05 mg/kg levels from water, and from wheat the recoveries were 86.3-91.3% with RSD r below 5.0% at 0.2, 0.5, and 1 mg/kg levels. This method could be used to identify and quantify the carfentrazone-ethyl enantiomers in food and environment. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA.

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