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Your search keyword '"Du, Hai-Yan"' showing total 5 results
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5 results on '"Du, Hai-Yan"'

1. Origin of giant magnetoresistance in layered nodal-line semimetal TaNiTe5 nanoflakes

Author

Zhou, Ding-Bang, Gao, Kuang-Hong, Zhao, Meng-Fan, Jia, Zhi-Yan, Hu, Xiao-Xia, Guo, Qian-Jin, Du, Hai-Yan, Chen, Xiao-Ping, and Li, Zhi-Qing

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Layered transition metal chalcogenides have stimulated a wide research interest due to their many exotic physical properties. In this paper, we studied the magnetotransport properties of the exfoliated TaNiTe5, a recently discovered Dirac nodal-line semimetal. A giant positive magnetoresistance (MR) is observed when the current is parallel to the crystallographic c axis, while it is strongly diminished when the current flows along the a axis. The observed giant MR is gradually suppressed either on reducing the thickness of nanoflake or on increasing temperature. By performing MR measurement in tilted magnetic fields, the interlayer coupling is found to be weakened both by reducing the thickness and by increasing temperature. We propose a mechanism of electron-electron interaction-assisted interlayer transport as a origin of the giant MR. The mechanism is likely to provide a explanation for the giant MR in other layered materials., Comment: 21 pages, 7 figures, 1 table

Published
2024

4. Ca Minerals and Oral Bioavailability of Pb, Cd, and As from Indoor Dust in Mice: Mechanisms and Health Implications

Author

Li, Hong-Bo, primary, Xue, Rong-Yue, additional, Chen, Xiao-Qiang, additional, Lin, Xin-Ying, additional, Shi, Xiao-Xia, additional, Du, Hai-Yan, additional, Yin, Nai-Yi, additional, Cui, Yan-Shan, additional, Li, Li-Na, additional, Scheckel, Kirk G., additional, Juhasz, Albert L., additional, Xue, Xi-Mei, additional, Zhu, Yong-Guan, additional, and Ma, Lena Q., additional

Published
2022
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5. Ca minerals and oral bioavailability of Pb, Cd, and as from indoor dust in mice: mechanisms and health implications

Author

Hong-Bo Li, Rong-Yue Xue, Xiao-Qiang Chen, Xin-Ying Lin, Xiao-Xia Shi, Hai-Yan Du, Nai-Yi Yin, Yan-Shan Cui, Li-Na Li, Kirk G. Scheckel, Albert L. Juhasz, Xi-Mei Xue, Yong-Guan Zhu, Lena Q. Ma, Li, Hong Bo, Xue, Rong Yue, Chen, Xiao Qiang, Lin, Xin Ying, Shi, Xiao Xia, Du, Hai Yan, Yin, Nai Yi, Cui, Yan Shan, Li, Li Na, Scheckel, Kirk G, Juhasz, Albert L, Xue, Xi Mei, Zhu, Yong Guan, and Ma, Lena Q

Subjects
oral bioavailability, indoor dust in mice, Health, Toxicology and Mutagenesis, Public Health, Environmental and Occupational Health, Ca minerals
Abstract

Background:Elevating dietary calcium (Ca) intake can reduce metal(loid)oral bioavailability. However, the ability of a range of Ca minerals to reduce oral bioavailability of lead (Pb), cadmium (Cd), and arsenic (As) from indoor dust remains unclear. Objectives:This study evaluated the ability of Ca minerals to reduce Pb, Cd, and As oral bioavailability from indoor dust and associated mechanisms. Methods:A mouse bioassay was conducted to assess Pb, Cd, and As relative bioavailability (RBA) in three indoor dust samples, which were amended into mouse chow without and with addition of CaHPO4, CaCO3, Ca gluconate, Ca lactate, Ca aspartate, and Ca citrate at 200–5,000μg/g Ca. The mRNA expression of Ca and phosphate (P) transporters involved in transcellular Pb, Cd and As transport in the duodenum of mice was quantified using real-time polymerase chain reaction. Serum 1,25-Dihydroxyvitamin D3 [1,25(OH)2D3], parathyroid hormone (PTH), and renal CYP27B1 activity controlling 1,25(OH)2D3 synthesis were measured using ELISA kits. Metal(loid) speciation in the feces of mice was characterized using X-ray absorption near-edge structure (XANES) spectroscopy. In general, mice exposed to each of the Ca minerals exhibited lower Pb-, Cd-, and As-RBA for three dusts. However, RBAs with the different Ca minerals varied. Among minerals, mice fed dietary CaHPO4 did not exhibit lower duodenal mRNA expression of Ca transporters but did have the lowest Pb and Cd oral bioavailability at the highest Ca concentration (5,000μg/g Ca; 51%−95% and 52%−74% lower in comparison with the control). Lead phosphate precipitates (e.g., chloropyromorphite) were observed in feces of mice fed dietary CaHPO4. In comparison, mice fed organic Ca minerals (Ca gluconate, Ca lactate, Ca aspartate, and Ca citrate) had lower duodenal mRNA expression of Ca transporters, but Pb and Cd oral bioavailability was higher than in mice fed CaHPO4. In terms of As, mice fed Ca aspartate exhibited the lowest As oral bioavailability at the highest Ca concentration (5,000μg/g Ca; 41%−72% lower) and the lowest duodenal expression of P transporter (88% lower). The presence of aspartate was not associated with higher As solubility in the intestine. Our study used a mouse model of exposure to household dust with various concentrations and species of Ca to determine whether different Ca minerals can reduce bioavailability of Pb, Cd, and As in mice and elucidate the mechanism(s) involved. This study can contribute to the practical application of optimal Ca minerals to protect humans from Pb, Cd, and As coexposure in the environment. https://doi.org/10.1289/EHP11730 Refereed/Peer-reviewed

Published
2022

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