المؤلفون: Xian-Mei Yu, Jie Wang, Rui Gao, Bang-Chu Gong, Cheng-Xiang Ai

المصدر: Frontiers in Plant Science, Vol 13 (2022)

مصطلحات موضوعية: persimmon leaf, metabolomics analysis, transcriptomic analysis, functional nutrients, flavonoids, mineral contents, Plant culture, SB1-1110

الوصف: Persimmon leaves are used for making persimmon leaf tea or as functional ingredients due to their enrichment in flavonoids, the beneficial mineral contents, and favorable flavors contributed by volatile aroma compounds. The varieties/cultivars had a significant influence on the quality and flavor of persimmon leaf tea. In this study, the integrated metabolomic-transcriptomic analysis was conducted to investigate the potential in flavonoid biosynthesis, mineral absorption, and degradation of aromatic compounds from tender leaves of “Diospyros kaki. Heishi” (HS), “Diospyros kaki Thunb. Nishimurawase” (NM), and “Diospyros kaki Thunb. Taifu” (TF), using rootstock “Diospyros Lotus Linn” (DL) as the control. The metabolomic analysis showed that 382, 391, and 368 metabolites were differentially accumulated in the comparison of DL vs. HS, DL vs. NM, and DL vs. TF, respectively, and 229 common metabolites were obtained by comparative analysis. By RNA sequencing, 182,008 unigenes with 652 bp of mean length were annotated and 2,598, 3,503, and 3,333 differentially expressed genes (DEGs) were detected from the comparison of DL vs. HS, DL vs. NM, and DL vs. TF, respectively. After the Gene Ontology (GO) and the Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment, 6, 6, and 3 DEGs [with | log2(fold change)| ≥ 1 simultaneously in the three comparisons] involved in flavonoid biosynthesis, mineral absorption, and degradation of aromatic compounds, respectively, were selected for quantitative reverse transcription-polymerase chain reaction (qRT-PCR) validation and the consistent trends of the relative expression level of each DEG with RNA sequencing (RNA-seq) data were observed. Based on the transcriptomic analysis and qRT-PCR validation, it was observed that the leaves of HS, NM, and TF had the greatest level of mineral absorption, flavonoid biosynthesis, and degradation of aromatic compounds, respectively. In addition, a positive correlation between the 15 DEGs and their metabolites was observed by the conjoint analysis. Thus, the tender leaves of HS, NM, and TF could be recommended for the production of persimmon leaf tea rich in mineral elements, flavonoid, and aroma compounds, respectively.

وصف الملف: electronic resource

العلاقة: https://www.frontiersin.org/articles/10.3389/fpls.2022.904208/fullTest; https://doaj.org/toc/1664-462XTest

الوصول الحر: https://doaj.org/article/b75656336efc4c5b8490fe6f436f697dTest

المؤلفون: Jiang, Tian, Yin, Ke, Zheng, Xin, Yu, Hao, Cheng, Xiang-Ai

مصطلحات موضوعية: Physics - Optics

الوصف: Black phosphorus (BP) with its enticing electric and optical properties is intensely researched in the field of optoelectronics. In this paper, Q-switched pulses at 1550 nm and 2 um wavelengths are obtained by inserting bulk-structured BP based saturable absorber (SA) into an erbium-doped fiber laser (EDFL) and an thulium/holmium-doped fiber laser (THDFL), respectively. The BP-SA was prepared by depositing powered BP material on to the flat side of a side-polished single mode fiber. Q-switched 1550 nm pulses with width tuned from 9.35 to 31 us were obtained for the EDFL. For the THDFL, over 100 nm wavelength range could be achieved from 1832 to 1935 nm by adjusting the pump power. To the best of our knowledge, these results demonstrated the broadband saturable absorption property of BP and for the first time verified that BP as a new two-dimensional material for applications in saturable absorption devices.
Comment: 8 pages, 6 figures, 1 table

الوصول الحر: http://arxiv.org/abs/1504.07341Test

المؤلفون: Zhang, Chao, Chen, Sheng-Ping, Li, Bo, Cheng, Xiang-Ai

المصدر: IEEE Photonics Journal ; volume 14, issue 1, page 1-7 ; ISSN 1943-0655 1943-0647

مصطلحات موضوعية: Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics

الإتاحة: https://doi.org/10.1109/jphot.2022.3146086Test
http://xplorestaging.ieee.org/ielx7/4563994/9614351/09691810.pdf?arnumber=9691810Test

المؤلفون: Xu, Zhongjie, Cheng, Xiang-Ai, Ning, Yu, Hua, Weihong, Zhong, Hairong

المساهمون: Poulin-Girard, Anne-Sophie, Shaw, Joseph A.

المصدر: Fifteenth Conference on Education and Training in Optics and Photonics: ETOP 2019

الإتاحة: https://doi.org/10.1117/12.2523844Test

المؤلفون: Zhou, Junhu, Zhou, Tong, Yang, Dongsheng, Wang, Zhenyu, Zhang, Zhen, You, Jie, Xu, Zhongjie, Zheng, Xin, Cheng, Xiang-ai

المصدر: Photonic Sensors ; volume 9, issue 3, page 268-276 ; ISSN 1674-9251 2190-7439

مصطلحات موضوعية: Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials

الإتاحة: https://doi.org/10.1007/s13320-019-0528-yTest

المؤلفون: Cheng, Xiang-Ai, Ning, Yu, Xu, Zhongjie, Chen, Zilun, Li, Dun, Zhong, Hairong

المساهمون: Liu, Xu, Zhang, Xi-Cheng

المصدر: 14th Conference on Education and Training in Optics and Photonics: ETOP 2017

الإتاحة: https://doi.org/10.1117/12.2269906Test

المؤلفون: Su, Junhong, Chen, Lianghui, Chu, Junhao, Zhu, Shining, Yu, Qifeng, Zhang, Chao, Li, Jing-Sui, Chen, Sheng-Ping, Cheng, Xiang-Ai

المصدر: Proceedings of SPIE; March 2022, Vol. 12169 Issue: 1 p12169DM-12169DM-6, 109528p

المؤلفون: Huang, Liangjin, Yao, Tianfu, Yang, Binhua, Leng, Jinyong, Zhou, Pu, Pan, Zhiyong, Gu, Shaoyi, Cheng, Xiang ai

المساهمون: National Natural Science Foundation of China

المصدر: IEEE Journal of Selected Topics in Quantum Electronics ; volume 24, issue 3, page 1-9 ; ISSN 1077-260X 1558-4542

مصطلحات موضوعية: Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics

الإتاحة: https://doi.org/10.1109/jstqe.2017.2770099Test
http://xplorestaging.ieee.org/ielx7/2944/7985002/08094902.pdf?arnumber=8094902Test

المؤلفون: Cheng Xiang-ai, Shen Man-Ling, Jiang Tian, Zhang Chen-Xi, Ouyang Hao, Hu Si-Yang

المصدر: Acta Physica Sinica. 69:184212

مصطلحات موضوعية: Nonlinear optical, Materials science, General Physics and Astronomy, Polarization dependent, Molecular physics

الوصف: Germanium diselenide (GeSe2), a layered IV-VI semiconductor, has an in-plane anisotropic structure and a wide band gap, exhibiting unique optical, electrical, and thermal properties. In this paper, polarization axis Raman spectrum and linear absorption spectrum are used to characterize the crystal axis orientation and energy band characteristics of GeSe2 flake, respectively. Based on the results, a micro-domain I scan system is used to study the optical nonlinear absorption mechanism of GeSe2 near the resonance band. The results show that the nonlinear absorption mechanism in GeSe2 is a superposition of saturation absorption and excited state absorption, and is strongly dependent on the polarization and wavelength of incident light. Under near-resonance excitation (450 nm), the excited state absorption is more greatly dependent on polarization. With different polarizations of incident light, the modulation depth can be changed from 4.6% to 9.9%; for non-resonant excitation (400 nm), the modulation depth only changes from 7.0% to 9.7%. At the same time, compared with saturation absorption, the polarization-dependent excited state absorption is greatly affected by the distance away from the resonance excitation wavelength.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::4b6855020fb71b0d157660ba80eb4645Test
https://doi.org/10.7498/aps.69.20200443Test

المؤلفون: Luo, Bing-feng, Lu, Long-zhao, Cheng, Xiang-ai, Yu, Xiang-yang

المساهمون: Wang, Lijun, Zhou, Zhiping

المصدر: SPIE Proceedings ; High Power Lasers, High Energy Lasers, and Silicon-based Photonic Integration ; ISSN 0277-786X

الإتاحة: https://doi.org/10.1117/12.2247409Test