1,725,800 research outputs found
Yu Ming
No full textBlack-and-white photograph of a Chinese woman, inscribed on verso: "To Waldo: Always smilingly yours, Yu Ming.
Synthesis of new phosphorus ligands for regioselective hydroformylation:
No full textTetraphosphorous ligands with enhanced chelating ability through multiple chelating modes and increased local phosphorus concentration can provide great regioselectivity in Rh/Ligand hydroformylation system. Here we report the synthesis of a series of pyrrole-based tetraphosphorus ligands were synthesized with introducing different functional groups into 3, 3', 5, 5'-positions of the biphenyl, and their applications to the hydroformylation of internal olefins, 1, 5-hexadiene, styrene and its derivatives, and alkyl acrylates.
Internal olefins are cheaper and more readily available feedstock than terminal olefins, the development of highly selective and active isomerization-hydroformylation catalysts for internal olefins is of great importance from economic and energy points of view. In particular, the alkyl-substituted tetraphosphorous ligands gave the best results (for 2-octene, n: i up to 207, for 2-hexene, n: i up to 362).
Double hydroformylation of 1, n-diolefins is a convenient method to produce dialdehydes. The hydroformylation of 1, 5- hexadiene can be achieved with essentially high regioselectivity (linear selectivity is up to 98%).
Styrene and its derivatives prefer the branched aldehydes under the hydro-formylation conditions. However, the linear aldehydes can also be widely used for the production of detergents and plasticizers and important intermediates. Our studies on the hydroformylation of styrene and its derivatives achieved unprecedented high linear selectivity (l/b up to 22 for styrene).
Hydroformylation of alkyl acrylate produces 1, 3- and1, 4-bifunctional compounds, which can be further converted into synthetically useful intermediates. Alkyl acrylates have been hydroformylated to the linear aldehydes with high regioselectivity (linear/branch > 99/1) and extraordinarily high average turnover frequencies (up to 5400 h 1) by using a rhodium complex with a tetraphosphorus ligand. The result is in sharp contrast to the most of other processes that favor production of the branched aldehyde (typically > 95% branched for most Rh-catalyzed reaction systems).M.S.Includes bibliographical referencesby Yu-Ming Chi
Whitehead (James D.) Shaw (Yu-ming) Girardot (N.J.) éd China and Christianity. Historical and Future Encounters
No full textAubin Françoise. Whitehead (James D.) Shaw (Yu-ming) Girardot (N.J.) éd China and Christianity. Historical and Future Encounters. In: Archives de sciences sociales des religions, n°54/2, 1982. p. 248
Fabrication, characterization and theoretical modeling of Te-doped Bi nanowire systems for thermoelectric applications
No full textThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.Includes bibliographical references (p. 129-133).by Yu-Ming Lin.S.M
The paradoxical co-existence of submissiveness and subversiveness in the theology of Yu-Ming Jia
No full textThis thesis aims to study Yu-ming Jia’s theology from a postcolonial perspective. Yu-ming Jia (1880-1964) is a conservative Protestant theologian who was actively engaged himself in Chinese protestant churches and theological education during the first half of the 20th century. It was seen that he constructed his theology mainly in a hierarchical context, i.e., the subjugating relationship between missionaries and Chinese Christians appearing in missionary enterprise. This study will focus on three areas of Jia’s theology: christology, ecclesiology and soteriology, which will be analysed with Homi Bhabha’s three conceptions: ambivalence, mimicry and hybridity. These key concepts in postcolonial theory and discourse are regarded as the characteristic features and contributions of the theory. This study can provide a postcolonial perspective to understand Jia’s theology and subsequently brings about the paradoxical insights which have not been discovered by previous scholars who solely apply the approach of systematic theology and restrained themselves within a binary framework, Liberal/Conservative or Modernist/Fundamentalist, to study Jia’s theology. While subversiveness and submissiveness are both discovered in Jia’s theological discourse, the study concludes that there is a paradoxical co-existence of subversiveness and submissiveness in Jia’s theology
Digital dissertation consortium
No full textChen Yu-ming."January 2003."Thesis (Ph.D.)--Chinese University of Hong Kong, 2003.Includes bibliographical references (p. 177-197).Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.Mode of access: World Wide Web.Abstracts in English and Chinese
A new species of Crenoptychoptera Kalugina, 1985 (Diptera: Ptychopteridae) from the Middle-Late Jurassic of Jiyuan Basin, China
No full textLIU, YU-MING, HUANG, DI-YING (2021): A new species of Crenoptychoptera Kalugina, 1985 (Diptera: Ptychopteridae) from the Middle-Late Jurassic of Jiyuan Basin, China. Palaeoentomology 4 (1): 27-29, DOI: 10.11646/palaeoentomology.4.1.5, URL: http://dx.doi.org/10.11646/palaeoentomology.4.1.
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