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26 results on '"Zhang, Songbin"'

1. Selective quantum Zeno effect of ultracold atom-molecule scattering in dynamic magnetic fields

Author

Yang, Hanwei, Li, Zunqi, Zhang, Songbin, Cao, Lushuai, Bohn, John, Zhang, Shutao, Xu, Haitan, Wang, Gaoren, and Li, Zheng

Subjects
Quantum Physics, Physics - Atomic Physics
Abstract

We demonstrated that final states of ultracold scattering between atom and molecule can be selectively produced using dynamic magnetic fields of multiple frequencies. The mechanism of the dynamic magnetic field control is based on a generalized quantum Zeno effect for the selected scattering channels. In particular, we use an atom-molecule spin flip scattering to show that the transition to the selected final spin projection of the molecule in the inelastic scattering can be suppressed by dynamic modulation of coupling between the Floquet engineered initial and final states.

Published
2021
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5. Selecting resonances in molecular scattering by anti-Zeno effect.

Author

Yang, Hanwei, Li, Zunqi, Zhang, Songbin, Cao, Lushuai, Zhang, Zeji, Li, Sizhe, Wang, Gaoren, Xu, Haitan, and Li, Zheng

Subjects
MOLECULAR shapes, ULTRACOLD molecules, RESONANCE, ISOTOPE separation, MOLECULAR collisions, SINGLE molecule magnets
Abstract

Utilizing the anti-Zeno effect, we demonstrate that the resonances of ultracold molecular interactions can be selectively controlled by modulating the energy levels of molecules with a dynamic magnetic field. We show numerically that the inelastic scattering cross section of the selected isotopic molecules in the mixed isotopic molecular gas can be boosted for 2–3 orders of magnitude by modulation of Zeeman splittings. The mechanism of the resonant anti-Zeno effect in the ultracold scattering is based on matching the spectral modulation function of the magnetic field with the Floquet-engineered resonance of the molecular collision. The resulting insight provides a recipe to implement resonant anti-Zeno effect in control of molecular interactions, such as the selection of reaction channels between molecules involving shape and Feshbach resonances, and external field-assisted separation of isotopes. [ABSTRACT FROM AUTHOR]

Published
2023
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12. Breakdown of the Coulomb-explosion imaging technique induced by the ultrafast rotation of fragments

Author

Hu, XiaoQing, primary, Peng, YiGeng, additional, Zhu, XiaoLong, additional, Yan, ShunCheng, additional, Liu, Ling, additional, Feng, WenTian, additional, Guo, DaLong, additional, Gao, Yong, additional, Zhang, ShaoFeng, additional, Zhao, DongMei, additional, Dong, DaPu, additional, Hai, Bang, additional, Xu, JiaWei, additional, Zhang, SongBin, additional, Ma, X., additional, Wang, JianGuo, additional, and Wu, Yong, additional

Published
2020
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20. Oral exposure of mice to cadmium (II), chromium (VI) and their mixture induce oxidative- and endoplasmic reticulum-stress mediated apoptosis in the livers.

Author

Jin, Yuanxiang, Zhang, Songbin, Tao, Runhua, Huang, Jie, He, Xingzhi, Qu, Lanya, and Fu, Zhengwei

Subjects
LABORATORY mice, PHYSIOLOGICAL effects of cadmium, CHROMIUM, MAMMAL physiology, OXIDATIVE stress, ENDOPLASMIC reticulum, APOPTOSIS
Abstract

ABSTRACT Health concerns regarding the environmental heavy metals in wildlife and humans have increased in recent years. We evaluated the effects of exposure of mice to low doses of cadmium (Cd), chromium (Cr) and their mixtures on oxidative- and ER-stress. Male adult mice were orally exposed to Cd (0.5 and 2 mg kg−1), Cr (1 and 4 mg kg−1) and binary Cd+Cr mixtures (0.25 + 05 and 1 + 2 mg kg−1) daily for 36 days. We observed that the bioaccumulation of Cd and Cr in the liver in a dose-dependent manner, and the Cd and Cr contents in the 2 mg kg−1 Cd and 4 mg kg−1 Cr treated groups reached 2.43 and 3.46 µg g−1 liver weight. In addition, treatments with 2 mg kg−1 Cd, 4 mg kg−1 Cr or their mixture (1 + 2 mg kg−1) significantly decreased body and liver weights, increased the levels of reactive oxygen species (ROS), malondialdehyde (MDA) and activities of catalase (CAT) and glutathione peroxidase (GPX) in the liver. Moreover, Cd and Cr exposures also elevated the transcription of the oxidative- and endoplasmic reticulum (ER)-stress related genes including Cat, Gpx, heme oxygenase 1 (Ho-1), regulated protein 78 (Grp78), activating transcription factor 6 (Atf6) and proaoptotic CCAAT/-enhancer-binding protein homologous protein (Chop) in a dose dependent manner in the liver. And hepatic cytochrome c levels increased in all Cd, Cr or their mixture treated groups. Furthermore, the transcriptional status and the activities of Caspase 9 and Caspase 3 were increased significantly in the liver when exposed to high doses of Cd, Cr or their mixture. These results suggested that a long period exposure of mice to Cd or Cr has the potential to elicit oxidative- and ER-stress mediated apoptosis in their livers. © 2014 Wiley Periodicals, Inc. Environ Toxicol 31: 693-705, 2016. [ABSTRACT FROM AUTHOR]

Published
2016
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