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Search Results: 1 - 10 of 17299 matches for " YongMing Fu "
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Noncommutative QED corrections to process $e^+e^-\to\mu^+\mu^-\gamma$ at linear collider energies
Fu, Yongming;Sheng, Zheng-Mao
High Energy Physics - Phenomenology , 2007,
Abstract: The cross section for process $e^+e^-\to\mu^+\mu^-\gamma$ in the framework of noncommutative quantum electrodynamics(NC QED) is studied. It is shown that the NC correction of scattering sections is not monotonous enhancement with total energy of colliding electrons, but there is an optimal collision energy to get the greatest NC correction. Moreover, there is a linear relation between NC QED scale energy and the optimal collision energy. The experimental methods to improve the precision of determining NC effects are discussed, because this process is an ${\cal O}(\alpha^3) $ NC QED process, high precision tests are necessary.
In vitro anti-angiogenic properties of LGD1069, a selective retinoid X-receptor agonist through down-regulating Runx2 expression on Human endothelial cells
Jianjiang Fu, Wei Wang, Yu-Hui Liu, Hong Lu, Yongming Luo
BMC Cancer , 2011, DOI: 10.1186/1471-2407-11-227
Abstract: Human umbilical vein endothelial cells (HUVECs) were used for in vitro study. MTT assay and Sulforhodamine B assay were used for cell viability assay; the tube formation assay was used to investigate the effect of LGD1069 on angiogenesis in vitro. In vitro adhesion, migration and invasion of HUVEC cells were analyzed by Matrigel adhesion, migration and invasion assay. Gene expressions were measured by RT-PCR and Western blot analysis.Our data showed here that LGD1069 inhibited the activation of TGF-β/Smad pathway significantly. Furthermore, it was demonstrated that expression of Runx2 was suppressed pronouncedly during incubation with LGD1069. Runx2 is a DNA-binding transcription factor which plays a master role in tumor-induced angiogenesis and cancer cells metastasis by interaction with the TGF-β/Smad pathway of transcriptional modulators.Our results suggested that LGD1069 may impair angiogenic and metastatic potential induced by tumor cells through suppressing expression of Runx2 directly on human endothelial cells, which may point out new pathway through which LGD1069 display anti-angiogenic properties, and provide new molecular evidence to support LGD1069 as a potent anti-metastatic agent in cancer therapy.Carcinomas are the most frequent type of human malignancies, and the vast majority of cancer deaths are caused by the formation of metastases rather than by the primary tumor itself [1]. Despite its clinical importance, spreading to distant organs remains the most insidious aspect of solid cancers, and the complexities about the genetic and biochemical determinants remain poorly understood. But for more than a century, cancer biologists paid lots of attention to this aspect. Based on current findings in this field, Gupta et al. posed a framework of cancer metastasis. There are several key steps in the biological cascade of metastasis: altered cellular adhesion and cell motility, disruption of the basement membrane and extracellular matrix, entry and survival
Black carp growth hormone gene transgenic allotetraploid hybrids of Carassius auratus red var. (♀)×Cyprinus carpio (♂)
Hao Feng,YongMing Fu,Jian Luo,Hui Wu,Yun Liu,ShaoJun Liu
Science China Life Sciences , 2011, DOI: 10.1007/s11427-011-4210-x
Abstract: Ecological safety is a major consideration in the commercialization of transgenic fish. Development of sterile transgenic triploid fish through hybridization of transgenic tetraploid fish and transgenic diploid fish is a feasible way to solve this problem. The “all-fish” transgene, pbcAbcGHc, containing the black carp β-actin gene promoter and the open reading frame (ORF) of the black carp growth hormone (GH) gene was constructed and introduced into fertilized eggs of allotetraploid fish through microinjection. Contrast cultivation results showed that the growth rate of 150 day-old P0 black carp GH gene transgenic allotetraploid fish was much higher than that of controls. Sixty 150 day-old transgenic allotetraploid fish were assayed by PCR for transgene integration and 90% of fish were positive for the transgene. The transgene was detected in 13 of 20 sperm samples from male transgenic allotetraploid fish. RT-PCR detected transcription of the exogenous black carp GH gene in the muscle, liver, kidney and ovaries of the largest transgenic allotetraploid fish. This study has developed P0 black carp GH gene transgenic allotetraploid fish with a highly increased growth rate, which provides a solid foundation for the establishment of a pure line of transgenic allotetraploid fish and for the large scale production of sterile transgenic triploid fish.
Optical resolution ability of optically active poly (N-diphenyl-methyl maleimide)
Weihong Liu,Lianhe Shao,Yongming Chen,Chuanfu Chen,Guoquan Liu,Fu Xi
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02898916
Abstract: A new optically active polymer, (+)poly(N-diphenylmethyl maleimide), was coated on macroporous silica gel and used as a chiral stationary phase for high performance liquid Chromatographic resolution of enantiomers. The chiral polymer showed efficient resolution ability to some polar racemates, and eleven pairs of racemates are resolved effectively.
The unsulfated extracellular N-terminus of vGPCR reduces the tumorigenicity of hGRO-α in nude mice
Hui Wu,YongMing Fu,Jun Xiao,Man Zhou,Wei Zhou,Hao Feng
Science China Life Sciences , 2013, DOI: 10.1007/s11427-012-4405-9
Abstract: The Kaposi’s Sarcoma-associated Herpesvirus (KSHV)-encoded G-protein coupled receptor (vGPCR) is an oncoprotein that is implicated in KSHV-associated malignancies. We previously revealed vGPCR incorporates sulfate groups within its extracellular N-terminal tyrosine residues (Y26 and Y28) and that this tyrosine sulfation is crucial for its tumorigenicity in nude mice. hGRO-α binds vGPCR in a sulfotyrosine-dependent manner and promotes its tumorigenicity through autocrine signaling. Interestingly, an unsulfated vGPCR mutant (yydd-vGPCR) attenuated the tumor growth triggered by hGRO-α. In this study, the extracellular N-terminus of vGPCR (wt-vGN) and an unsulfated vGPCR mutant (yydd-vGN) were individually secreted, expressed and purified. A radioactive labeling assay demonstrated that wt-vGN but not yydd-vGN incorporated [35S]-sulfate. In nude mice, NIH3T3 cells expressing yydd-vGN but not wt-vGN could significantly inhibit the tumor growth triggered by hGRO-α. All our data support the conclusion that the unsulfated extracellular N-terminus of vGPCR reduces the tumorigenicity of hGRO-α.
Optical resolution ability of optically active poly(N-diphenylmethyl maleimide)

Weihong Liu,Lianhe Shao,Yongming Chen,Chuanfu Chen,Guoquan Liu,Fu Xi,

科学通报(英文版) , 1998,
Abstract: A new optically active polymer, (+)poly(N-diphenylmethyl maleimide), was coated on macroporous silica gel and used as a chiral stationary phase for high performance liquid Chromatographic resolution of enantiomers. The chiral polymer showed efficient resolution ability to some polar racemates, and eleven pairs of racemates are resolved effectively.
Association between Physical Activity and Neighborhood Environment among Middle-Aged Adults in Shanghai
Rena Zhou,Yang Li,Masahiro Umezaki,Yongming Ding,Hongwei Jiang,Alexis Comber,Hua Fu
Journal of Environmental and Public Health , 2013, DOI: 10.1155/2013/239595
Abstract: Objective. To determine the perceived neighborhood environment (NE) variables that are associated with physical activity (PA) in urban areas in China. Methods. Parents of students at two junior high schools in Shanghai, one downtown and the other in the suburbs, were recruited to participate in the study. They completed an International Physical Activity Questionnaire (IPAQ) and Neighborhood Environment Walkability Scale-Abbreviated (NEWS-A) survey. Participant physical activity was also objectively measured using accelerometers. Results. Participants from downtown areas were more positively associated with transportation PA and leisure-time PA than respondents living in the suburbs. Residential density was found to be a significant positive predictor of recreational or leisure-based PA. Street connectivity was negatively associated with leisure time PA for respondents. Moderate-vigorous PA was found to be negatively associated with traffic safety. There were no significant associations between environmental factors and transportation PA. Women had higher levels of moderate-vigorous PA than men. Conclusions. The results of this study demonstrate that residential density, street connectivity, and traffic safety have a significant impact on Chinese middle-aged adults' PA, suggesting urban planning strategies for promoting positive public health outcomes. 1. Introduction Much research has identified and quantified the health benefits of physical activity (PA) [1]. For example, increased PA has been found to reduce the risk of cardiovascular diseases, diabetes, cancers, osteoporosis, and depression [2]. One interesting trend found in countries with emergent economies is a consistent decline of PA associated with economic development [3]. China is experiencing a process of transition from a developing country to a developed one, with increases in urbanization/urban living and associated increases of physical inactivity [4, 5]. For example, average weekly physical activity among adults in China fell by 32% between 1991 and 2006 [5] and car ownership increased from 0.5% to 13.1% between 2000 and 2010 [6]. Some variation with age has been identified: participation in exercise by all Chinese residents was 14.1% but was the lowest amongst the 18–44 age group at 5.9%. The U-shape trend of PA with age is also reflected locally and data from 2005 [7] showed that participation in exercise by Shanghai residents was the least at around 40 years of age. These data and trends indicate an urgent need to consider factors influencing middle-age adults’ PA in China. Many
A maximum principle for Markov-modulated SDEs of mean-field type and mean-field game
Yongming Tai
Mathematics , 2014,
Abstract: In this paper, we analyze mean-field game modulated by finite states markov chains. We first develop a sufficient stochastic maximum principle for the optimal control of a Markov-modulated stochastic differential equation (SDE) of mean-field type whose coefficients depend on the state of the process, some functional of its law as well as variation of time and sample. As coefficients are perturbed by a Markov chain and thus random, to study such SDEs, we analyze existence and uniqueness of solutions of a class of mean-field type SDEs whose coefficients are random Lipschitz as well as the property of propagation of chaos for associated interacting particles system with method parallel to existing results as a byproduct. We also solve approximate Nash equilibrium for the Markov-modulated mean-field game by mean-field theory.
Finite Automata Based on Quantum Logic and Their Determinization
Yongming Li
Computer Science , 2007,
Abstract: We give the quantum subset construction of orthomodular lattice-valued finite automata, then we show the equivalence between orthomodular lattice-valued finite automata, orthomodular lattice-valued deterministic finite automata and orthomodular lattice-valued finite automata with empty string-moves. Based on these equivalences, we study the algebraic operations on orthomodular lattice-valued regular languages, then we establish Kleene theorem in the frame of quantum logic.
Nonlinear Stability of Zonally Symmetric Quasi-geostrophic Flow
Liu Yongming,

大气科学进展 , 1999,
Abstract: By using the conservation laws and the method of variational principle, an improved Arnol'd's second nonlinear stability theorem for the two-dimensional multilayer quasi-geostrophic model in periodic channel is obtained. This work is supported by the National Natural Science Foundation of China (No. 49455007).
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