[surveillance on contamination of total aflatoxins in corn, peanut, rice, walnut and pine nut in several areas in china].to realize the contamination of total aflatoxins in corn, peanut, rice, walnut and pine nut in china, and provide the base data for establishing a china tolerance limit standard and an international control practice for total aflatoxins.200616620597
[analysis of trace elements in corncob by microwave digestion-icp-aes].the contents of trace elements of zn, mg, mn, sr, fe, pb, cu and se in the corncob collected from beijing, shan-dong, jilin, yunnan, xinjiang, gansu, shanxi, shaanxi, jiangsu, neimeng in china were determined by icp-aes using microwave digestion. the optimum condition of digesting the corncob was: put 1.5 ml of 68% nitric acid and 0.5 ml of hydrofluoric acid in the pot, then digested the sample with 3 steps under the 400 w power in the microwave oven. this digesting procedure could completely an ...200717944429
a universal pcr primer to detect members of the potyviridae and its use to examine the taxonomic status of several members of the family.a universal primer (sprimer: 5'-ggx aay aay agy ggx caz cc-3', x = a, g, c or t; y = t or c; z = a or g), designed from the consensus sequences that code for the conserved sequence gnnsgqp in the nib region of members of the family potyviridae, was used to amplify by rt-pcr the 3'-terminal genome regions from infected plant samples representing 21 different viruses in the family. sequencing of some of the fragments (c. 1.7 kb) showed that the type strain (attc pv-107) of oat necrotic mottle viru ...200111402861
fumonisins as a possible contributory risk factor for primary liver cancer: a 3-year study of corn harvested in haimen, china, by hplc and elisa.employing hplc fluorometry, gas-liquid chromatography (glc) and a novel enzyme-linked immunosorbent assay (elisa) based on a monoclonal antibody, 40 corn samples, each collected in 1993 from agricultural stocks for human consumption in haimen (jiangsu county) and penlai (shandong province), high- and low-risk areas for primary liver cancer (plc) in china, respectively, were analysed for fumonisins (fbs), aflatoxins (afs) and trichothecenes. levels and positive rates of fbs and deoxynivalenol (do ...19979449219
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