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173 results on '"Zhao, Kan"'

28. Post-translational cleavage of HMW-GS Dy10 allele improves the cookie-making quality in common wheat (Triticum aestivum)

Author

Wang, Yan, Chen, Qing, Li, Yang, Guo, Zhenru, Liu, Caihong, Wan, Yongfang, Hawkesford, Malcolm, Zhu, Jing, Wu, Wang, Wei, Meiqiao, Zhao, Kan, Jiang, Yunfeng, Zhang, Yazhou, Xu, Qiang, Kong, Li, Pu, Zhien, Deng, Mei, Jiang, Qiantao, Lan, Xiujin, Wang, Jirui, Chen, Guoyue, Ma, Jian, Zheng, Youliang, Wei, Yuming, and Qi, Pengfei

Published
2021
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30. Transformation of Type III to Type II Porous Liquids by Tuning Surface Rigidity of Rhodium(II)‐Based Metal‐Organic Polyhedra for CO2 Cycloaddition.

Author

Dinker, Manish Kumar, Li, Meng‐Meng, Zhao, Kan, Zuo, Mingrui, Ding, Lifeng, Liu, Xiao‐Qin, and Sun, Lin‐Bing

Subjects
LIQUID surfaces, POLYHEDRA, RING formation (Chemistry), RHODIUM, CARBON sequestration
Abstract

Porous liquids (PLs), a summation of porous hosts and bulky solvents bestowing permanent cavities, are the prominent emerging materials. Despite great efforts, exploration of porous hosts and bulky solvents is still needed to develop new PL systems. Metal‐organic polyhedra (MOPs) with discrete molecular architectures can be considered as porous hosts; however, many of them are insoluble entities. Here we report the transformation of type III PL to type II PLs by tuning the surface rigidity of insoluble MOP, Rh24L24, in a bulky ionic liquid (IL). Functionalization of N‐donor molecules on Rh−Rh axial sites ensue their solubilization in bulky IL which confer type II PLs. Experimental and theoretical studies reveal the bulkiness of IL as per the cage apertures, and the cause of their dissolution as well. The obtained PLs, capturing more CO2 than neat solvent, have depicted higher catalytic activity for CO2 cycloaddition compared to individual MOPs and IL. [ABSTRACT FROM AUTHOR]

Published
2023
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35. High-Precision Time-Frequency Signal Simultaneous Transfer System via a WDM-Based Fiber Link

Author

Ruifang Dong, Qi Zang, Chen Faxi, Xue Deng, Tao Liu, Honglei Quan, Xiang Zhang, Zhao Kan, Wenxiang Xue, and Shougang Zhang

Subjects
Physics, Physics - Instrumentation and Detectors, time and frequency transfer, transfer ADEV, fiber transfer link, Time signal, FOS: Physical sciences, WDM network, Instrumentation and Detectors (physics.ins-det), Signal, Atomic and Molecular Physics, and Optics, Time and frequency transfer, Time–frequency analysis, TA1501-1820, Wavelength-division multiplexing, Electronic engineering, Radiology, Nuclear Medicine and imaging, Applied optics. Photonics, Allan variance, Instrumentation, Microwave, Active noise control, Optics (physics.optics), Physics - Optics
Abstract

In this paper, we demonstrate a wavelength division multiplexing (WDM) based system for simultaneously delivering ultrastable optical frequency reference, 10 GHz microwave frequency reference, and one pulse per second (1 PPS) time signal via a 50 km fiber network. For each signal, a unique noise cancellation technique is used to maintain the precision of them. After being compensated, the transfer frequency instability in terms of overlapping Allan deviation (OADEV) for the optical frequency achieves 2E-17/s and scales down to 2E-20/10000 s, which for the 10 GHz microwave reference approaches 4E-15/s and decreases to 1.4E-17/10000 s, and the time uncertainty of the 1 PPS time signal along the system is 2.08 ps. In this scheme, specific channels of WDM are respectively occupied for different signals to avoid the possible crosstalk interference effect between the transmitted reference signals. To estimate the performance of the above scheme, independent of these signals is also demonstrated in this 50 km link, the results are similar to that in the case of simultaneous delivery. This work shows that the WDM-based system is a promising method for building a nationwide time and frequency fiber transfer system with a communication optical network., 11 pages,4 figures,1 table

Published
2021

38. Porous Liquids Responsive to Light**.

Author

Dinker, Manish Kumar, Zhao, Kan, Dai, Zhengxing, Ding, Lifeng, Liu, Xiao‐Qin, and Sun, Lin‐Bing

Subjects
*LIQUIDS, *ADSORPTION capacity, *VISIBLE spectra, *IONIC liquids, *POLYHEDRA
Abstract

A porous liquid is a unique liquid medium that combines the cavity of porous solids with the fluidity of liquids. This special characteristic offers potential in various applications. Here we report a type II photoresponsive porous ionic liquid (PPIL) from dissolving a photoresponsive metal‐organic polyhedron (PMOP, constructed from dicopper and azobenzene‐containing carboxylate) in a polyethylene‐glycol‐functionalized bulky ionic liquid (IL). Owing to favorable ion interactions, bulky IL molecules encircle outside PMOP, and the inter cavities are maintained. The azobenzene moieties can be isomerized freely in the PPILs to expose and shelter active sites upon visible and UV light irradiation. Hence, the adsorption capacity of PPILs is controllable by light irradiation, and the change in CO2 uptake is up to 30 % compared to neat IL. This study may inspire the development of new adsorption process regulated by light instead of pressure and temperature swing adsorption. [ABSTRACT FROM AUTHOR]

Published
2022
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45. Permanent cavities in ionic liquids created by metal–organic polyhedra.

Author

Dinker, Manish Kumar, Zhao, Kan, Liu, Song, Qi, Shi-Chao, Li, Yu-Xia, Liu, Gong-Ping, Ding, Lifeng, Liu, Xiao-Qin, and Sun, Lin-Bing

Abstract

As an emerging type of material, porous liquids combine the fluidity of liquids with the permanent porosity of porous solids, which makes them promising for various applications. Despite several significant attempts earlier, the porous liquid system still requires the novel entries of porous hosts and bulky liquids. Here, we report a new porous liquid system based on the coalition of metal–organic polyhedra and well-designed bulky ionic liquids. As a proof of concept, the typical metal–organic polyhedra, Pd12L24 where L represents the ligands, are employed as porous hosts. Also, a polyethylene glycol-linked bis-imidazolium-based bulky ionic liquid with a molecular size larger than the pore aperture of Pd12L24 is designed as a solvent, yielding type II porous ionic liquids. These liquid materials possessing permanent cavities, good thermal stability and long-term durability have captured high CO2 compared to neat ionic liquids. Besides, they are found separating CO2 from N2 and CH4 molecules not only as an entity but also as supported porous liquid membranes. We expect that the present strategy can be used to construct other porous liquids with specific functionality for additional applications. [ABSTRACT FROM AUTHOR]

Published
2022
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47. Transcriptome sequences resolve deep relationships of the grape family.

Author

Jun Wen, Zhiqiang Xiong, Ze-Long Nie, Likai Mao, Yabing Zhu, Xian-Zhao Kan, Stefanie M Ickert-Bond, Jean Gerrath, Elizabeth A Zimmer, and Xiao-Dong Fang

Subjects
Medicine, Science
Abstract

Previous phylogenetic studies of the grape family (Vitaceae) yielded poorly resolved deep relationships, thus impeding our understanding of the evolution of the family. Next-generation sequencing now offers access to protein coding sequences very easily, quickly and cost-effectively. To improve upon earlier work, we extracted 417 orthologous single-copy nuclear genes from the transcriptomes of 15 species of the Vitaceae, covering its phylogenetic diversity. The resulting transcriptome phylogeny provides robust support for the deep relationships, showing the phylogenetic utility of transcriptome data for plants over a time scale at least since the mid-Cretaceous. The pros and cons of transcriptome data for phylogenetic inference in plants are also evaluated.

Published
2013
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48. The Q c5 Allele Increases Wheat Bread-Making Quality by Regulating SPA and SPR.

Author

Guo, Zhenru, Chen, Qing, Zhu, Jing, Wang, Yan, Li, Yang, Li, Qingcheng, Zhao, Kan, Li, Yue, Tang, Rui, Shi, Xiaoli, Tan, Kenan, Kong, Li, Jiang, Yunfeng, Jiang, Qiantao, Wang, Jirui, Chen, Guoyue, Wei, Yuming, Zheng, Youliang, and Qi, Pengfei

Subjects
MISSENSE mutation, WHEAT, WHEAT breeding, GENETIC regulation, FOOD crops, ALLELES, MESSENGER RNA
Abstract

Common wheat (Triticum aestivum L.) is an important food crop with a unique processing quality. The Q gene positively regulates the processing quality of wheat, but the underlying mechanism remains unclear. Here, a new Q allele (Qc5) responsible for compact spikes and good bread performance was identified. Compared with the Q allele widely distributed in modern common wheat cultivars, Qc5 had a missense mutation outside the miRNA172-binding site. This missense mutation led to a more compact messenger RNA (mRNA) secondary structure around the miRNA172-binding region, resulting in increased Qc5 expression during the spike development stage and a consequent increase in spike density. Furthermore, this missense mutation weakened the physical interaction between Qc5 and storage protein activator (SPA) in seeds and suppressed the expression of storage protein repressor (SPR). These changes increased the grain protein content and improved the bread-making quality of wheat. In conclusion, a missense mutation increases Q expression because of the resulting highly folded mRNA secondary structure around the miRNA172-binding site. Furthermore, this mutation improves the bread-making quality of wheat by repressing the expression of SPR and influencing the physical interaction between Q and SPA. These findings provide new insights into the miRNA172-directed regulation of gene expression, with implications for wheat breeding. [ABSTRACT FROM AUTHOR]

Published
2022
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50. Magnetic Properties and Electronic Configurations of Mn Ions in the Diluted Magnetic Semiconductor Ba1−xKx(Zn1−yMny)2As2 Studied by X-ray Magnetic Circular Dichroism and Resonant Inelastic X-ray Scattering

Author

Suzuki, Hakuto, Zhao, Guoqiang, Okamoto, Jun, Sakamoto, Shoya, Chen, Zhi-Yin, Nonaka, Yosuke, Shibata, Goro, Zhao, Kan, Chen, Bijuan, Wu, Wen-Bin, Chang, Fan-Hsiu, Lin, Hong-Ji, Chen, Chien-Te, Tanaka, Arata, Kobayashi, Masaki, Gu, Bo, Maekawa, Sadamichi, Uemura, Yasutomo J., Jin, Changqing, and Huang, Di-Jing

Abstract

The magnetic properties and the electronic excitations of the new diluted magnetic semiconductor Ba1−xKx(Zn1−yMny)2As2 have been studied by x-ray magnetic circular dichroism (XMCD) and resonant inelastic x-ray scattering (RIXS) at the Mn L2,3 edge. The sum rule analysis of the XMCD spectra yields the net spin moment of 0.45 μB/Mn and the small orbital moment of 0.05 μB/Mn. This indicates that the Mn atoms are in the high-spin configurations of d5, whereas the presence of competing ferromagnetic and antiferromagnetic interactions between the Mn ions reduces the net spin moment. RIXS spectra show broad peaks from 1 to 6 eV energy loss, which originate from the d–d crystal field excitations of the Mn ions. Based on a comparison of the RIXS line shapes with those of Ga1−xMnxAs, we conclude that the ground state of Mn in Ba1−xKx(Zn1−yMny)2As2 consists not only of the charge-transferred 3d5L electron configuration (L: ligand hole) with weakly bound holes as in Ga1−xMnxAs, but also of the pure 3d5 configuration with free holes. [ABSTRACT FROM AUTHOR]

Published
2022
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