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789 results on '"Sun, Xiao-dong"'

10. Identification of prognostic biomarkers for cholangiocarcinoma by combined analysis of molecular characteristics of clinical MVI subtypes and molecular subtypes

Author

Li, Ming-Yue, Liu, Ya-Hui, Wei, Feng, Zhang, Ping, Sun, Xiao-Dong, Wang, Meng, Du, Xiao-Hong, Ye, Jun-Feng, Qiu, Wei, Shi, Xiao-Ju, Ji, Bai, Wang, Ying-Chao, Jiang, Chao, Chai, Wen-Gang, Huang, Bo, Liu, Xing-Kai, Chen, Qing-Min, Fu, Yu, Hu, Xin-Tong, Chen, Li-Guo, He, Jia-Xue, Chai, Kai-Yuan, Gou, Zhao-Ming, Yang, Tian, Wang, Guang-Yi, Jiang, Yan-Fang, Fan, Zhong-Qi, and Lv, Guo-Yue

Published
2024
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17. Systematic study of $\alpha$ decay for odd-$A$ nuclei within a two-potential approach

Author

Sun, Xiao-Dong, Duan, Chao, Deng, Jun-Gang, Guo, Ping, and Li, Xiao-Hua

Subjects
Nuclear Theory
Abstract

$\alpha$ decay is usually associated with both ground and low-lying isomeric states of heavy and superheavy nuclei, and the unpaired nucleon plays a key role on $\alpha$ decay. In this work, we systematically studied the $\alpha$ decay half-lives of odd-$A$ nuclei, including both favored and unfavored $\alpha$ decay within the two-potential approach based on the isospin dependent nuclear potential. The $\alpha$ preformation probabilities are estimated by using an analytic formula taking into account the shell structure and proton-neutron correlation, and the parameters are obtained through the $\alpha$ decay half-lives data. The results indicate that in general the $\alpha$ preformation probabilities of even-$Z$, odd-$N$ nuclei are slightly smaller than the odd-$Z$, even-$N$ ones. We found that the odd-even staggering effect may play a more important role on spontaneous fission than $\alpha$ decay. The calculated half-lives can well reproduce the experimental data.

Published
2019
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35. Systematic study of favored \alpha-decay half-lives of closed shell odd-A and doubly-odd nuclei related to ground and isomeric states

Author

Sun, Xiao-Dong, Guo, Ping, and Li, Xiao-Hua

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

In this work, we systematically investigate the favored $\alpha$-decay half-lives and $\alpha$ preformation probabilities of both odd-$A$ and doubly-odd nuclei related to ground and isomeric states around the doubly magic cores at $Z=82$, $N=82$ and at $Z=82$, $N=126$, respectively, within a two-potential approach from the view of the valence nucleon (or hole). The results show that the $\alpha$ preformation probability is linear related to $N_\text{p}N_\text{n}$ or $N_\text{p}N_\text{n}I$, where $N_\text{p}$, $N_\text{n}$, and $I$ are the number of valence protons (or holes), the number of valence neutrons (or holes), and the isospin of the parent nucleus, respectively. Fitting the $\alpha$ preformation probabilities data extracted from the differences between experimental data and calculated half-lives without a shell correction, we give two analytic formulas of the $\alpha$ preformation probabilities and the values of corresponding parameters. Using those formulas and the parameters, we calculate the $\alpha$-decay half-lives for those nuclei. The calculated results can well reproduce the experimental data., Comment: 9 pages, 6 figures

Published
2016
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36. Systematic study of $\alpha$ decay for isomer related nuclei within a two-potential approach

Author

Sun, Xiao-Dong, Guo, Ping, and Li, Xiao-Hua

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

$\alpha$ decay occurs in both ground states and isomers of nuclei. In this work, we use the two-potential approach to systematically study whether isomeric states play a key role on $\alpha$ particle clustering or not. The results indicate the ratios of $\alpha$ decay preformation probabilities of isomers to ground states are found to be around 1.

Published
2016
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39. Seed Priming with Dynamically Transformed Selenium Nanoparticles to Enhance Salt Tolerance in Rice

Author

Xing, Rong-Xiang, Sun, Xiao-Dong, Wang, Yue, Xie, Xiao-Min, Tan, Miao-Miao, Xu, Meng-Xin, Liu, Xiao-Yu, Jiang, Yu-Qian, Liu, Mei-Yan, Duan, Jian-Lu, Ma, Jing-Ya, Sun, Yu-Chen, Meng, Ge, and Yuan, Xian-Zheng

Abstract

Seed priming with nanomaterials is an emerging approach for improving plant stress tolerance. Here, we demonstrated a mechanism for enhancing salt tolerance in rice under salt stress via priming with nonstimulatory nanoparticles such as selenium nanoparticles (SeNPs), distinct from stimulatory nanomaterials. Due to the dynamic transformation ability of SeNPs, SeNP priming could enhance rice salt tolerance by mediating the glutathione cycle to eliminate excess reactive oxygen species (ROS). During priming, SeNPs penetrated rice seeds and transitioned into a soluble form (99.9%) within the embryo endosperm. Subsequently, the soluble selenium (Se) was transported to rice roots and metabolized into various Se-related derivatives, including selenomethionine (SeMet), Na2SeO3(Se IV), selenocysteine (SeCys2), and methylselenocysteine (MeSeCys). These derivatives significantly enhanced the root activities of key enzymes such as glutathione peroxidase (GSH-PX), glutathione reductase (GR), catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD) by 24.97%, 47.98%, 16.23%, 16.81%, and 14.82%, respectively, thus reinforcing the glutathione cycle and ROS scavenging pathways. Moreover, these alterations induced transcriptional changes in rice seedlings, with genes involved in signal transduction, transcription factors (TFs), ROS scavenging, and protein folding being upregulated, activating signal perception and self-repair mechanisms. These findings offer valuable insights for the agricultural application of nanomaterials.

Published
2024
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41. Systematic study of $\alpha$ decay half-lives for even-even nuclei within a two-potential approach

Author

Sun, Xiao-Dong, Guo, Ping, and Li, Xiao-Hua

Subjects
Nuclear Theory
Abstract

$\alpha$ decay is a common and important process for natural radioactivity of heavy and superheavy nuclei. The $\alpha$ decay half-lives for even-even nuclei from Z=62 to Z=118 are systematically researched based on the two-potential approach with a quasi-stationary state approximation. To describe the deviations between experimental half-lives and calculated results due to the nuclear shell structure, a hindrance factor related with $\alpha$ particle preformation probability is introduced. Our results can well reproduce the experimental data equally to the density-dependent cluster model and the generalized liquid drop model. We also study the isospin effect of nuclear potential in this work. Considering the isospin effect the calculated results improved about 7.3$\%$.

Published
2015
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