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22 results on '"Lü, Haiyan"'

1. Genome-Wide Identification of the Whirly Gene Family and Its Potential Function in Low Phosphate Stress in Soybean (Glycine max).

Author

Li, Zhimin, Zhai, Xuhao, Zhang, Lina, Yang, Yifei, Zhu, Hongqing, Lü, Haiyan, Xiong, Erhui, Chu, Shanshan, Zhang, Xingguo, Zhang, Dan, and Hu, Dandan

Subjects
GENE families, CHROMOSOMES, HAPLOTYPES, TRANSCRIPTION factors, METABOLIC regulation
Abstract

The Whirly (WHY) gene family, functioning as transcription factors, plays an essential role in the regulation of plant metabolic responses, which has been demonstrated across multiple species. However, the WHY gene family and its functions in soybean remains unclear. In this paper, we conducted genome-wide screening and identification to characterize the WHY gene family. Seven WHY members were identified and randomly distributed across six chromosomes. The phylogenetic evolutionary tree of WHY genes in soybean and other species was divided into five clades. An in-depth analysis revealed that segmental duplications significantly contributed to the expansion of GmWHYs, and the GmWHY gene members may have experienced evolutionary pressure for purifying selection in soybeans. The analysis of promoter Cis-elements in GmWHYs suggested their potential significance in addressing diverse stress conditions. The expression patterns of GmWHYs exhibited tissue-specific variations throughout the different stages of soybean development. Additionally, six GmWHY genes exhibited different responses to low phosphate stress. These findings will provide a theoretical basis and valuable reference for the future exploration of WHY gene function. [ABSTRACT FROM AUTHOR]

Published
2024
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11. Microstructure Selection Involving Nucleation in Directionally Solidified Nd-Fe-B Peritectic Alloys

Author

Liu Lin, Fu Hengzhi, Zhong Hong, Lü Haiyan, LI Shuangming, and Zou Guangrong

Subjects
Growth velocity, Equiaxed crystals, Materials science, Morphology (linguistics), Phase (matter), Metallurgy, General Engineering, Nucleation, Thermodynamics, Liquidus, Microstructure, Directional solidification
Abstract

Directional solidification experiments were performed on Nd 14 Fe 79 B 7 alloys to investigate microstructure formation related to nucleation. It was found that a small amount of α-Fe dendrites with equiaxed morphology existed in specimens grown at 200 and 500 μm/s. A banded structure showing alternate growth of α-Fe and Nd 2 Fe 14 B dendrites, was formed in the specimen at 500 μm/s. The formation of the equiaxed morphology microstructure or the banded structure is attributed to the phase nucleation ahead of the solidifying interface, since an undercooled zone corresponding to γ-Fe liquidus would appear ahead of the growing γ-Fe interface at the growth velocity of 200 and 500 μm/s. However, at growth velocity of 500 μm/s, only an undercooled zone corresponding to Nd 2 Fe 14 B liquidus would appear. These undercooled zones cause the nucleation of γ-Fe and Nd 2 Fe 14 B phases, resulting in the different microstructure patterns. The theoretical predictions are in good agreement with the experimental results.

Published
2009

15. Processes of the deposition and vicissitude of Mu Us Desert, China since 150 ka B.P

Author

Lü Haiyan, Sun Donghuai, Zhang Jiashen, Yan Mancun, Li Baosheng, Dong Guang-rong, Zhu Yi-zhi, Jin He-ling, and Gao Quan-zhou

Subjects
Paleontology, Winter monsoon, Climatology, Facies, Desert (particle physics), General Earth and Planetary Sciences, East Asia, Sedimentary rock, Monsoon, China, Deposition (law), Geology
Abstract

“Milanggouwan stratigraphical section” named lately takes down 27 cycles of alternately evolutionary histories of desert depositions in the Mu Us area with the fluviolacustrine facies and palaeosols since 150 ka B. P. Studies show that the sedimentary form was induced by the growth and decline and confrontation each other between the winter monsoon and the summer monsoon of East Asia in the past 150 ka.

Published
1998

21. Influence of excitation power on temperature-dependent photoluminescence of phase-separated InGaN quantum wells

Author

Lü, Haiyan, Lü, Yuanjie, Wang, Qiang, Li, Jianfei, Feng, Zhihong, Xu, Xiangang, and Ji, Ziwu

Abstract

Temperature-dependent photoluminescence (PL) of phase-separated InGaN quantum wells is investigated over a broader excitation power range. With increasing excitation power from 0.5 μW to 50 mW, the In-rich quasi-quantum dot (QD)-related PL peak disappears at about 3 mW, while temperature behavior of the InGaN matrix-related PL peak energy (linewidth) gradually evolves from a strong “S-shaped” (“W-shaped”) temperature dependence into a weak “S-shaped” (an approximately “V-shaped”), until becoming an inverted “V-shaped” (a monotonically increasing) temperature dependence. This indicates that, with increasing excitation power, the carrier localization effect is gradually reduced and the QD-related transition is submerged by the significantly enhanced InGaN matrix-related transition, while the carrier thermalization effect gradually increases to become predominant at high excitation powers.

Published
2016

22. Microstructure evolution of peritectic Nd14Fe79B7 alloy during directional solidification

Author

Zhong, Hong, Li, Shuangming, Lü, Haiyan, Liu, Lin, Zou, Guangrong, and Fu, Hengzhi

Subjects
*MICROSTRUCTURE, *ALLOYS, *DIRECTIONAL solidification, *MICROMECHANICS
Abstract

Abstract: Bridgman type directional solidification experiments were carried out in Nd14Fe79B7 alloy. Microstructure evolutions along with growth velocities were investigated. At low velocities from 1 to 200μm/s, the microstructures consisted of leading α-Fe dendrites and peritectic Nd2Fe14B phase in the interdendritic region. At medium velocities of 425 and 500μm/s, an incomplete banded structure formed, containing circles of α-Fe/Nd2Fe14B–Nd2Fe14B dendrites. At high velocities of 1, 3 and 5mm/s, a transition from γ-Fe dendrites to Nd2Fe14B dendrites occurred. Phase selection phenomena were theoretically studied using the extremum criterion which assumes growth-controlled phase selection. The theoretical results are in agreement with experimental results at low velocities of 1–200μm/s and high velocities of 3 and 5mm/s. The incomplete dendritic bands at 425 and 500μm/s were explained by nucleation of Nd2Fe14B phase at the γ-Fe dendritic interface, and growth competition between γ-Fe and the nucleated Nd2Fe14B phase. Phase transition from γ-Fe to Nd2Fe14B at 1mm/s was interpreted by abundant nucleation and quick growth of Nd2Fe14B phase at the γ-Fe dendritic interface. [Copyright &y& Elsevier]

Published
2008
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