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Shi R.,Agro Environmental Protection Institute | Lv J.,Supreme Technology | Feng J.,Supreme Technology
Bulletin of Environmental Contamination and Toxicology | Year: 2011

In this study, 35 representative farmland soil samples from suburban areas in south Shenyang, the capital city in Liaoning province, China, were collected to evaluate the pollution of 114 pesticides. Surface soil samples were air-dried and sieved. Ultrasonic extraction was used for pesticides preparation prior to analysis with gas chromatography-mass spectrometry. The total concentrations of tested pesticides in the area ranged in 0-51.32 ng/g and the average of concentrations was 6.86 ng/g. Six pesticides, including butachlor(with detect frequency 71.4%), p,p′-DDE (88.6%), p,p′-DDT (77.1%), o,p′-DDD (82.9%), hexachlorobenzene (88.6%) and δ-HCB (77.1%), were detected most frequently. It indicated that DDTs (N.D.-40.25 ng/g) and HCHs (N.D.-42.79 ng/g) were the predominant pesticide pollutants in soil because of their long term persistence. On the contrary, most of organophosphorus pesticides, pyrethroids and carbamates were not detected. Spatial variation of six pesticides with high detection frequency (>70%) in soil was illustrated. Pollution levels, characteristics and the possible sources were also discussed. The data were helpful to figure out the pollution of the pesticides and could be further used to evaluate the health risk associated with food safety. © 2011 Springer Science+Business Media, LLC.

Zhang L.,National Marine Environmental Monitoring Center | Lv J.,Supreme Technology | Liao C.,CAS Yantai Institute of Coastal Zone Research
Biological Trace Element Research | Year: 2012

Xuanwei and Fuyuan, located in the Yunnan province in southwest of China, are known to have a strikingly high incidence of lung cancer. Among the many factors that have been explored, the association between lung cancer and trace elements has not received enough attention. In this study, dietary samples were collected from 60 families of the lung cancer and control groups and abundances of 14 trace elements were determined using inductively coupled-plasma mass spectroscopy. Accuracy and sensitivity of the method were demonstrated by analyzing national standard reference materials. The results showed that the dietary intake of the trace elements contributed 96.6% of total intake. Among the 14 elements tested, cadmium and titanium were found to be present at a significantly higher level in the food consumed by the cancer group than by the control group. The intake of selenium by the population living in the areas is much lower than what it should be, with the people in the cancer group experiencing even more severe selenium deficiency. In addition, in both groups, the intakes of several essential elements (iron, copper, and zinc) from food and the drinking water were found to be significantly lower than required according to the Chinese Dietary Reference Intakes. The present study of the relationship between trace element intakes of lung cancer cases and controls provides important information urgently needed for the assessment of lung cancer risk of healthy subjects. The study also gives rational dietary suggestions to local residents which is important to the early diagnosis and pretreatment of lung cancer. © Springer Science+Business Media, LLC 2011.

Cai Y.,Agro Environmental Protection Institute | Lv J.,Supreme Technology | Feng J.,Supreme Technology
Journal of Polymers and the Environment | Year: 2013

Fourier transform infrared microscope and confocal Raman spectroscope were employed in this study to investigate four kinds of biodegradable plastics: poly(lactic acid),poly(butylenes adipate-co-terephthalate), poly(butylenes succinate) and poly(hydroxybutyrate-co-hydroxyvalerate), which are used more and more popularly in everyday life but can not be identified easily with other instruments. Infrared and Raman spectra of the plastics were tentatively interpreted. The indicative peaks to characterize the four polymers were also summarized. The result in this study can help the forensic scientists discriminate the plastics accurately when they occurred as trace evidences in cases, it also offers the producer and environment scientists an effective, non-invasive and fast method to characterize and identify these four polymers. © 2012 Springer Science+Business Media, LLC.

Zhang L.,National Marine Environmental Monitoring Center | Lv J.,Supreme Technology | Sun S.,PLA General Hospital
Biological Trace Element Research | Year: 2012

The concentrations of trace elements are closely related to tumor genesis, progression, and therapy. In order to establish the extent to which trace elements apply to lung cancer, 15 trace elements were determined in 60 lung tissue samples from residents of Xuanwei and Fuyuan, two counties with extremely high lung cancer incidences in Yunnan province, China. The results indicated that the levels of V, Fe, Zn, Cd, Ni, Cu, Se, and Pb in the lung cancer tissues were significantly different from those in benign tissues. Among the eight elements, the levels of V, Fe, Zn, and Cd in the lung cancer tissues were lower than those in the benign tissues, while those of Ni, Cu, Se, and Pb were higher. Multiple conditional logistic regression showed that among the 15 elements, Cu, Pb (β∈>∈0, OR∈>∈1), and Zn (β∈< ∈0, OR∈<∈1) were closely related to the lung cancer. Cu and Pb were classified as risk factors for local lung cancer and Zn was identified as a protective factor. The results obtained will provide dietary suggestions in terms of how to reduce lung cancer risks by appropriately balancing the intakes of certain trace elements especially for individuals who are from those two counties. © 2012 Springer Science+Business Media, LLC.

Cai Y.,Agro Environmental Protection Institute | Lv J.,Supreme Technology | Zhang W.,Shandong Academy of Sciences | Zhang L.,National Marine Environmental Monitoring Center
Journal of Environmental Monitoring | Year: 2012

Xuanwei and Fuyuan are located in the southwest of China and have the highest lung cancer incidence in China, possibly even highest in the world. Dietary samples were collected from these two counties and the contamination status of sixteen polycyclic aromatic hydrocarbons (PAHs) were determined. PAH components, food constituents, dietary exposure level, as well as spatial difference, were studied in the different groups. The percentage of dietary intake to total intake of PAHs was calculated and the relationship between the dietary intake of PAHs and the abnormal lung cancer incidence was primarily discussed. The results showed that rice and potatoes were the main foods of the local residents in Xuanwei and Fuyuan. The daily exposure doses of Bap (benzo[a]pyrene), total PAHs, and TEQs (toxic equivalents) based on Bap toxicity in two counties were estimated to be 458 ng d -1, 14532 ng d -1, and 896 ng d -1, respectively, which were much less than those in other cities reported previously. The lower ingestion amount of food with a relatively higher content of PAHs, such as meat and fish, could account for the lower exposure doses. PAHs with less than 4 rings occupied a high percentage of the total PAHs in food samples. The exposure doses varied significantly among different sites and even different families at the same site. Dietary exposure was not the main exposure route of PAHs at most sites. It appears that there was not a direct relationship between dietary exposure and the lung cancer incidence. However, high ratios of dietary intake to total PAHs intake (1.33%-70.61%) were found in several areas and rational diet suggestions should be given in these areas in the future. © 2012 The Royal Society of Chemistry.

Zhang L.,National Marine Environmental Monitoring Center | Lv J.,Supreme Technology
Environmental Earth Sciences | Year: 2014

Sediment and soil samples from Tingjiang, the biggest river in Fujian province, southeast China, were collected to assess the potential metallic pollution. Microwave-assisted digestion and ICP-MS were employed to determine the metal concentrations in two soil and three sediment samples from the basin. The distribution, the pollution status of thirteen element pollutions and the effluence from a metallurgy factory were investigated; the risk assessment was performed with two methods: the index of geo-accumulation and the ecological risk index. The index of geo-accumulation indicated the pollution status existed in the order of Cd > Cu = Mn > Zn = Se > Co = As > Pb > Ni > Cr = U > Th > Tl in the soil and Cd > Cu > As > Se > U > Co = Zn > Pb > Mn > Th > Ni = Tl > Cr in the sediment. The potential ecological risk index suggested the pollution existed in the soil in the order Cd > As > Cu > Pb > Zn > Cr and Cd > Cu > As > Pb > Zn > Cr in the sediment. Cd, Cu were identified as the main pollution factors, which coincided well with the possible influence from the metallurgy factory. The Risk Index values were 380 in the soil, 1,283 in the downstream sediment separately, which revealed that serious pollution and high ecological risks in some areas in this basin. © 2014, Springer-Verlag Berlin Heidelberg.

Zhang L.,Hebei Medical University | Wang Z.-H.,Supreme Technology | Li H.,Key Laboratory of Narcotics Assay and Control Technology | Liu Y.,Supreme Technology | And 3 more authors.
Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences | Year: 2014

A rapid and sensitive method based on solid phase extraction and ultra performance liquid chromatography-electrospray ionization tandem mass spectrometry (UPLC-ESI-MS/MS) for the simultaneous determination of amphetamine, methamphetamine, 3,4-methylenedioxyamphetamine, 3,4-methylene-dioxymethamphetamine, N-methyl-1-(3,4-methyl-enedioxyphenyl)-2-butanamine, 3,4-methylenedioxyethylamphetamine, p-methoxymethamphetamine, ephedrine, N-methylephedrine, cathinone, methcathinone, and ketamine in whole blood and urine was developed and validated. Following solid phase extraction, the analytes were separated on ACQUITY UPLC BEH Phenyl column (100mm×2.1mm, 1.7μm) under gradient elution using a mobile phase containing of acetonitrile and 0.3% formic acid in water at a flow rate of 0.4mLmin-1 and analyzed by a triplequadrupole mass spectrometer in the multiple reaction monitoring (MRM) mode. The proposed method was linear for each analyte with correlation coefficients over 0.99. Recovery validation studies showed accuracy bias below 4.4%. Acceptable precision was also obtained with a relative standard deviation below 8.9%. The sensitivity of the assay was found to be adequate for the quantitation of the illicit drugs in whole blood and urine sample and was higher than reported methods. The present method was proved to be reliable and robust for drug screening in forensic toxicological analysis. © 2014 .

Supreme Technology | Date: 2015-06-16

Pedal drives for sewing machines; hemming machines; ironing machines; sewing machines; rotary steam presses, portable, for fabrics; cover stitching machines; button-sewing machines; overlock stitching machines; fabric cutting machines; platens for industrial sewing machines.

Supreme Technology | Date: 2015-06-16

Pedal drives for sewing machines; hemming machine; ironing machines; sewing machines; rotary steam presses, portable, for fabrics; cover stitching machines; button-sewing machines; overlock stitching machines; fabric cutting machines; platens for industrial sewing machine.

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