SPIE 10590, International Optical Design Conference 2017, 105901M Design of planar light guide concentrators for building integrated photovoltaics Eryn Fennig, Greg R.SPIE 10676, Digital Optics for Immersive Displays, 106760Y () Design of a spatially multiplexed light field display on curved surfaces for VR HMD applications Tianyi Yang, Nicholas S.SPIE 10676, Digital Optics for Immersive Displays, 106760S Design of a freeform gradient-index prism for mixed reality head mounted display Anthony J Yee, Wanyue Song, Nick Takaki, Tianyi Yang, Yang Zhao, Yunhui Ni, S.Moore OSA Advanced Photonics Congress (AP) 2019 (IPR, Networks, NOMA, SPPCom, PVLED), Burlingame, California, 2019, p. Planar Light Guide Concentrators for Building Integrated Photovoltaics Eryn Fennig, Greg R.Moore OSA Optical Design and Fabrication 2019 (Freeform, OFT), OSA Technical Digest (Optical Society of America, 2019), paper JT5A.15 Measuring temperature-dependent refractive index coefficient (dn/dT) of the IR Chalcogenide glass in LWIR using a Twyman-Green Interferometer Robert Y.These data are the first report on HBCD occurrence and health risk in soil-vegetable system of open fields.Īccumulation Brominated flame retardants Diastereomers Estimated daily intake Vegetable.Ĭopyright © 2019 Elsevier Ltd.
These results suggest that HBCD in the vegetables posed low health risk for the local population. The estimated daily intake (EDI) of ΣHBCDs via consumption of vegetables varied from 0.26 to 9.35 ng/kg bw/day with a mean of 3.60 ng/kg bw/day for adults and from 0.32 to 11.5 ng/kg bw/day with a mean of 4.41 ng/kg bw/day for Children, far lower than the oral reference dose (RfD, 2 × 10 5 ng/kg bw/day) proposed by US National Research Council. Thus bioconcentration factors (BCFs, the ratio of contaminant concentration in vegetable to that in soil) of HBCDs were generally greater than 1.0, implying higher accumulation in vegetable. The ∑HBCDs in vegetables ranged from 0.87 to 32.7 ng/g (dry weight) with a mean of 16.6 ng/g, generally higher than those of the corresponding soils. The distributions of HBCDs in both soil and vegetable were diastereomer-specific, with γ-HBCD being predominant. The sum concentrations of the three diastereoisomers (∑HBCDs) in soils varied from 0.99 to 18.4 ng/g (dry weight) with a mean of 5.77 ng/g, decreasing in the order of Jiangmen > Guangzhou > Huizhou > Foshan. In this study, three main HBCD diastereoisomers (α-, β-, and γ-HBCDs) were analyzed in paired soil and vegetable samples from vegetable farms in four cities (Guangzhou, Jiangmen, Huizhou, Foshan) of the Pearl River Delta region, Southern China. The distribution and diastereomeric profiles of hexabromocyclododecanes (HBCDs, identified as persistent organic pollutants) in soil-vegetable system of open fields remain unknown.
Electronic address: 5 College of Natural Resources and Environment, Integrate Microbiology Research Center, South China Agricultural University, Guangzhou, 510642, China Consortium on Health, Environment, Education and Research (CHEER), Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China.
0 kommentar(er)
