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18. The Development of China’s Linguistics Education

Author

Wang, Jieqiong, Striełkowski, Wadim, Editor-in-Chief, Black, Jessica M., Series Editor, Butterfield, Stephen A., Series Editor, Chang, Chi-Cheng, Series Editor, Cheng, Jiuqing, Series Editor, Dumanig, Francisco Perlas, Series Editor, Al-Mabuk, Radhi, Series Editor, Scheper-Hughes, Nancy, Series Editor, Urban, Mathias, Series Editor, Webb, Stephen, Series Editor, Yacob, Shakila, editor, Cicek, Berat, editor, Rak, Joanna, editor, and Ali, Ghaffar, editor

Published
2023
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19. A Study on the Innovation and Impact of New Media Technology on English Education and Teaching in Universities

Author

Wang, Jieqiong, Striełkowski, Wadim, Editor-in-Chief, Black, Jessica M., Series Editor, Butterfield, Stephen A., Series Editor, Chang, Chi-Cheng, Series Editor, Cheng, Jiuqing, Series Editor, Dumanig, Francisco Perlas, Series Editor, Al-Mabuk, Radhi, Series Editor, Scheper-Hughes, Nancy, Series Editor, Urban, Mathias, Series Editor, Webb, Stephen, Series Editor, Hussain, Rosila Bee Binti Mohd, editor, Parc, Jimmyn, editor, and Li, Jia, editor

Published
2023
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20. The Image of Supernatural Beings in Kongtong Wushu

Author

Wang, Jieqiong, Cao, Ning, Shi, Pan, Striełkowski, Wadim, Editor-in-Chief, Black, Jessica M., Series Editor, Butterfield, Stephen A., Series Editor, Chang, Chi-Cheng, Series Editor, Cheng, Jiuqing, Series Editor, Dumanig, Francisco Perlas, Series Editor, Al-Mabuk, Radhi, Series Editor, Scheper-Hughes, Nancy, Series Editor, Urban, Mathias, Series Editor, Webb, Stephen, Series Editor, Yau, Yung, editor, and Hage Chehade, Fadi, editor

Published
2023
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25. Analysis of Volatile Components in Chrysanthemum nankingense Leaves Dried by Different Methods by Headspace Solid Phase Microextraction-Gas Chromatography-Mass Spectrometry and Calculation of Odor Activity Value

Author

WU Yuzhen, WANG Jieqiong, YU Haitao, YU Xiaoyu, YU Zhifang

Subjects
chrysanthemum nankingense, drying method, gas chromatography-mass spectrometry, electronic nose, volatile compounds, differential analysis, Food processing and manufacture, TP368-456
Abstract

To determine the effects of drying methods on the volatile compounds and explore the key aroma compounds in Chrysanthemum nankingense leaves, head-space solid phase micro-extraction combined with gas chromatography mass spectrometry (HS-SPME-GC-MS) was employed for quantitative and qualitative analysis of the volatile compounds in C. nankingense leaves dried by hot air drying, vacuum-freeze drying or microwave-hot air drying. The result showed that a total of 140 compounds belonging to six classes (terpenes, esters, aldehydes, alcohols, aromatic compounds and other substances) were identified in all samples. Of these, 112, 86, 83 and 85 were detected in fresh and dried C. nankingense obtained by hot air drying, microwave-hot air drying, and vacuum-freeze drying, respectively. Among these compounds, terpenes were the most abundant, with contents of 229 474.33, 64 629.68, 56 469.88 and 70 832.87 μg/kg in fresh, hot air dried, microwave-hot air dried, and vacuum-freeze dried samples, respectively. Compared with the other drying methods, vacuum-freeze drying gave better retention of the abundance of volatile compounds. Vacuum-freeze dried C. nankingense had similar flavor to fresh samples, showing camphor-like, turpentine-like, flowery and grassy aromas. GC-MS combined with odor activity values (OAVs) confirmed that β-ocimene, caryophyllene and trans-β-farnesene were the major aroma components. GC-MS combined with E-nose can represent an efficient nondestructive method for the detection of volatile compounds in C. nankingense leaves and allow the discrimination of dried C. nankingense obtained by different drying methods. These results provide a theoretical basis for choosing drying methods and understanding the difference in volatiles components in dried C. nankingense obtained by different drying methods.

Published
2023
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50. Enhanced valley splitting in monolayer WSe2 due to magnetic exchange field

Author

Zhao, Chuan, Norden, Tenzin, Zhao, Puqin, Cheng, Yingchun, Zhang, Peiyao, Sun, Fan, Taheri, Payam, Wang, Jieqiong, Yang, Yihang, Scrace, Thomas, Kang, Kaifei, Yang, Sen, Miao, Guo-xing, Sabirianov, Renat, Kioseoglou, George, Petrou, Athos, and Zeng, Hao

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Exploiting the valley degree of freedom to store and manipulate information provides a novel paradigm for future electronics. A monolayer transition metal dichalcogenide (TMDC) with broken inversion symmetry possesses two degenerate yet inequivalent valleys, offering unique opportunities for valley control through helicity of light. Lifting the valley degeneracy by Zeeman splitting has been demonstrated recently, which may enable valley control by a magnetic field. However, the realized valley splitting is modest, (~ 0.2 meV/T). Here we show greatly enhanced valley spitting in monolayer WSe2, utilizing the interfacial magnetic exchange field (MEF) from a ferromagnetic EuS substrate. A valley splitting of 2.5 meV is demonstrated at 1 T by magneto-reflectance measurements. Moreover, the splitting follows the magnetization of EuS, a hallmark of the MEF. Utilizing MEF of a magnetic insulator can induce magnetic order, and valley and spin polarization in TMDCs, which may enable valleytronic and quantum computing applications.

Published
2016
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