Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Qing-yan Xu"'
Publikováno v:
China Foundry, Vol 15, Iss 4, Pp 299-306 (2018)
Turbine blades, produced by the directional solidifi cation (DS) process, often require high dimensional accuracy and excellent mechanical properties. A critical step in their production is the fabrication of wax patterns. However, the traditional
Externí odkaz:
https://doaj.org/article/3fccf406fc4b4db2abff525b8cd30924
Publikováno v:
China Foundry, Vol 13, Iss 6, Pp 402-413 (2016)
Numerical heat-transfer and turbulent flow model for an industrial high-pressure gas quenching vacuum furnace was established to simulate the heating, holding and gas fan quenching of a low rhenium-bearing Ni-based single crystal turbine blade. The m
Externí odkaz:
https://doaj.org/article/1ad666f7411746d3bd4fb5cd0ebb511b
Publikováno v:
China Foundry, Vol 13, Iss 2, Pp 114-122 (2016)
Due to the extensive application of Al-Si alloys in the automotive and aerospace industries as structural components, an understanding of their microstructural formation, such as dendrite and (Al+Si) eutectic, is of great importance to control the de
Externí odkaz:
https://doaj.org/article/5140869e4df94877a82890171dd0f800
Autor:
Qian Tang, Kai Guo, Xiao-Yang Li, Xiu-Ying Zheng, Xiang-Jian Kong, Zhong-Hui Zheng, Qing-Yan Xu, Xianming Deng
Publikováno v:
Marine Drugs, Vol 12, Iss 12, Pp 5993-6002 (2014)
Three new asperentin-type compounds, 6-O-α-d-ribosylasperentin (1) and 6-O-α-d-ribosyl-8-O-methylasperentin (2) and 5-hydroxyl-6-O-methylasperentin (3), along with asperentin (4) and its known analogues (5–9), were isolated from a halotolerant As
Externí odkaz:
https://doaj.org/article/1c058a3a3ff14005bb947b6ed3663a8c
Autor:
Yuan Lin, Ye-cheng Xiao, Hong Zhu, Qing-yan Xu, Lei Qi, Yu-bin Wang, Xiu-juan Li, Ma-li Zheng, Rui-sheng Zhong, Yi Zhang, Xiang-dong Xu, Bo-le Wu, Zhu-mei Xu, Xiang-hong Lu
Publikováno v:
Journal of Diabetes Research, Vol 2014 (2014)
The aim of the study was to assess serum fibroblast growth factor 21 (FGF21) concentrations in Chinese type 2 diabetic patients with and without retinopathy and to assess the association between FGF21 and the severity of retinopathy. 117 diabetic pat
Externí odkaz:
https://doaj.org/article/b050f0a2e517424eb2ee31045d5d1e19
Autor:
Lei Huang, Wen-Jian Lan, Rong Deng, Gong-Kan Feng, Qing-Yan Xu, Zhi-Yu Hu, Xiao-Feng Zhu, Hou-Jin Li
Publikováno v:
Marine Drugs, Vol 14, Iss 9, p 157 (2016)
By the method of 1H NMR prescreening and tracing the diagnostic proton signals of the methyl groups, three additional new triquinane-type sesquiterpenoids—chondrosterins K–M (1–3) and the known sesquiterpenoid anhydroarthrosporone (4)—were is
Externí odkaz:
https://doaj.org/article/8b4dc4c48a0c418dba791748a9fdc208
Publikováno v:
Acta Crystallographica Section E, Vol 67, Iss 7, Pp o1670-o1670 (2011)
In the title compound, C17H14N2O4, the seven-membered ring adopts a boat conformation, and the two benzene rings make a dihedral angle of 45.22 (5)°. The crystal packing is stabilized by intermolecular N—H...O and O—H...O hydrogen bonds.
Externí odkaz:
https://doaj.org/article/207c8754443644d6bad94b9807eb0871
Autor:
Jun-Liang Liu, Qing-Yan Xu
Publikováno v:
Acta Crystallographica Section E, Vol 67, Iss 6, Pp o1548-o1548 (2011)
In the title compound, C6H6O4, the furan ring is nearly coplanar with the carboxyl group, the maximum atomic deviation being 0.0248 (9) Å. The crystal packing is stabilized by classical O—H...O and weak C—H...O hydrogen bonding.
Externí odkaz:
https://doaj.org/article/fea5480d94ee494eae6d9b371482bf5f
Publikováno v:
China Foundry; Sep2024, Vol. 21 Issue 5, p476-490, 15p
Publikováno v:
China Foundry; Jul2024, Vol. 21 Issue 4, p379-386, 8p