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Search Results: 1 - 10 of 37022 matches for " Xueqing Yan "
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Analysis of the Feminism in Pride and Prejudice
Xueqing Wang,Yan Liu
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.12.1827-1830
Abstract: This article is dedicated to the study of profound meaning underlying in the female social, psychological and sexual reality in the novel Pride and Prejudice in Victorian England. It explores into the heroine Elizabeth to study Austen’s special perspective on feminism in the patriarchal society. In conclusion, this thesis examines the nature of Jane Austen’s pioneering literary feminism, and both the positive and negative characterizations of Elizabeth in the text reveal the writer’s feminist value in the Victorian England.
Advances in Somatic Embryogenesis Research of Horticultural Plants  [PDF]
Aiqing Ji, Xueqing Geng, Yan Zhang, Guoliang Wu
American Journal of Plant Sciences (AJPS) , 2011, DOI: 10.4236/ajps.2011.26087
Abstract: Advances in horticulture plant biotechnologies provide new opportunities for researchers to study the field of vegetative propagation and genetic engineering. Developments of clonal propagation methods, especially somatic embryogenesis (SE), have numerous potential applications. This paper reviewed progress of research on SE in horticultural plants in last decade; analyzed plant regeneration having both direct and indirect SE from the characteristics of occurrence means, but mainly in an indirect way; and discussed the impact factors of SE, as well as reviewed the research in the practical applications of horticulture plants SE in the practice.
Ribosylation Rapidly Induces α-Synuclein to Form Highly Cytotoxic Molten Globules of Advanced Glycation End Products
Lan Chen,Yan Wei,Xueqing Wang,Rongqiao He
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0009052
Abstract: Alpha synuclein (α-Syn) is the main component of Lewy bodies which are associated with several neurodegenerative diseases such as Parkinson's disease. While the glycation with D-glucose that results in α-Syn misfold and aggregation has been studied, the effects of glycation with D-ribose on α-Syn have not been investigated.
Phase-stable limited relativistic acceleration or unlimited relativistic acceleration in the laser-thin-foil interactions
Huang Yongsheng,Wang Naiyan,Tang Xiuzhang,Yan Xueqing
Physics , 2011,
Abstract: To clarify the relationship between phase-stable acceleration (PSA) and unlimited relativistic acceleration (URA) (Phys. Rev. Lett. 104, 135003 (2010)), an analytical relativistic model is proposed in the interactions of the ultra-intense laser and nanometer foils, based on hydrodynamic equations. The dependence of the ion momentum on time is consistent with the previous results and checked by PIC simulations. Depending on the initial ion momentum, relativistic RPA contains two acceleration processes: phase-stable limited relativistic acceleration (PS-LRA) and URA. In PS-LRA, the potential is a deep well trapping the ions. The ion front, i.e., the bottom, separates it into two parts: the left half region is PSA region; the right half region is PSD region, where the ions climb up and are decelerated to return back. In PS-LRA, the maximum ion energy is limited. If the initial ion momentum large enough, ions will experience a potential downhill and drop into a bottomless abyss, which is called phase-lock-like position. URA is not phase-stable any more. At the phase-lock-like position the ions can obtain unlimited energy gain and the ion density is non-zero. You cannot have both PSA and URA.
Reduce proton energy spread by target ablation
Shuan Zhao,Chen Lin,Jiaer Chen,Xueqing Yan
Physics , 2015,
Abstract: It's shown that, with strong target ablation monoenergetic protons along the laser direction is available during the laser aluminum foil interaction, which is different from the classic TNSA theory. When the laser pre-pulse is too strong that the whole target is vaporized, the energetic electrons generated in the gas preplasma will play an important role for the ion acceleration because the sheath field will not be available. These electrons beam, which is highly directional, will setup triangle envelope acceleration field along the laser direction at the target rear, reducing the ion energy spread.
A Contextual Item-Based Collaborative Filtering Technology  [PDF]
Xueqing Tan, Pan Pan
Intelligent Information Management (IIM) , 2012, DOI: 10.4236/iim.2012.43013
Abstract: This paper proposes a contextual item-based collaborative filtering technology, which is based on the traditional item-based collaborative filtering technology. In the process of the recommendation, user’s important mobile contextual information are taken into account, and the technology combines with those ratings on the items in the users’ historical contextual information who are familiar with user’s current context information in order to predict that which items will be preferred by user in his or her current context. At the end, an experiment is used to prove that the technology proposed in this paper can predict user’s preference in his or her mobile environment more accurately.
Co-expression of AaPMT and AaTRI effectively enhances the yields of tropane alkaloids in Anisodus acutangulus hairy roots
Guoyin Kai, Sheng Yang, Xiuqin Luo, Wentao Zhou, Xueqing Fu, Ang Zhang, Yan Zhang, Jianbo Xiao
BMC Biotechnology , 2011, DOI: 10.1186/1472-6750-11-43
Abstract: In this study, 21 AaPMT and AaTRI double gene transformed lines (PT lines), 9 AaPMT single gene transformed lines (P lines) and 5 AaTRI single gene transformed lines (T lines) were generated. RT-PCR and real-time fluorescence quantitative analysis results revealed that total AaPMT (AaPMT T) and total AaTRI (AaTRI T) gene transcripts in transgenic PT, P and T lines showed higher expression levels than native AaPMT (AaPMT E) and AaTRI (AaTRI E) gene transcripts. As compared to the control and single gene transformed lines (P or T lines), PT transgenic hairy root lines produced significantly higher levels of TA. The highest yield of TA was detected as 8.104 mg/g dw in line PT18, which was 8.66, 4.04, and 3.11-times higher than those of the control (0.935 mg/g dw), P3 (highest in P lines, 2.004 mg/g dw) and T12 (highest in T lines, 2.604 mg/g dw), respectively. All the tested samples were found to possess strong radical scavenging capacity, which were similar to control.In the present study, the co-expression of AaPMT and AaTRI genes in A. acutangulus hairy roots significantly improved the yields of TA and showed higher antioxidant activity than control because of higher total TA content, which is the first report on simultaneous introduction of PMT and TRI genes into TA-producing plant by biotechnological approaches.Tropane alkaloids (TA) including anisodamine, anisodine, hyoscyamine and scopolamine are widely used as anticholinergic agents, which act on the parasympathetic nervous system and exclusively exist in Solanaceous plants such as Anisodus, Atropa, Datura, Duboisia, Hyoscyamus, and Scopolia [1-3]. Specially, anisodamine is not as toxic as atropine and has fewer negative effects on the central nervous system than scopolamine [4]. Furthermore, anisodamine and anisodine also showed protective effects on acute lung injury induced by oleic acid and microvascular injury of acute renal failure in rats [5,6].The hairy root culture system offered many advantages such a
Transcriptional activation of microRNA-34a by NF-kappa B in human esophageal cancer cells
Juan Li, Kai Wang, Xuedan Chen, Hui Meng, Min Song, Yan Wang, Xueqing Xu, Yun Bai
BMC Molecular Biology , 2012, DOI: 10.1186/1471-2199-13-4
Abstract: We found that overexpression of NF-kappa B p65 subunit could increase miR-34a levels in EC109, an esophageal squamous cancer cell line, while ectopic expression of DN IkappaB leaded to a significant reduction of miR-34a expression. Bioinformatics analysis suggested three putative KB sites in promoter region of miR-34a gene. Mutation two of these KB sites impaired p65 induced miR-34a transcriptional activity. Chromatin immunoprecipitation and electrophoretic mobility shift assays both showed that NF-kappaB could specifically bind to the third KB site located in miR-34a promoter. In addition, we found that overexpression of NF-kappaB p65 could not successfully induce miR-34a expression in esophageal cancer cell lines with mutant p53 or decreased p53. Reporter assay further showed that NF-kappaB-induced miR-34a transcriptional activity was reduced by p53 impairment. Nevertheless, CHIP analysis suggested binding of NF-kappaB to miR-34a promoter was not affected in cells with mutant p53.Our work indicates a novel mechanism of miR-34a regulation that NF-kappaB could elevate miR-34a expression levels through directly binding to its promoter. And wildtype p53 is responsible for NF-kappaB-mediated miR-34a transcriptional activity but not for NF-kappaB binding. These findings might be helpful in understanding miR-34a abnormality in human malignancies and open new perspectives for the roles of miR-34a and NF-kappaB in tumor progression.MicroRNAs (miRNAs) are small, non-coding RNAs that negatively regulate gene expression at the posttranscriptional level. Emerging evidence has demonstrated that these small RNAs are involved in almost every aspects of tumor biology and could function as oncogenes or tumor suppressor genes [1]. MiR-34a has recently been found to act as an important tumor suppressor in the development of various cancers. A variety of genes referring to cell cycle and apoptosis control, such as CDK4/6, cyclin D1, E2F3, MYCN, and SIRT1and Bcl2 are demonstrated to be
Translation of Names and Comparison of Addressing between Chinese and English from the Intercultural Perspective
Xueqing Wang
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.9.1227-1230
Abstract: It is self-evident that to communicate, we must first know the participants’ names, or successful communication will be impossible. Names not only symbolize identities, but also denote special significance such as the great expectation from the parents. It is absolutely impolite and embarrassing to make mistakes in regard to others’ names. Therefore, it is of staggering significance in communication, especially in intercultural one. With the deepening project of reform and opening up to the outside world, frequent intercultural communications take place. Because the structure of people’s names in English-speaking countries is different from ours, it is extremely important to correctly translate foreign names and name foreigners. Only when we are aware of the differences can we carry out smooth intercultural communication. In this article, I will analyze these phenomena.
Language Iconicity from Sociolinguistic Perspective
Xueqing Wang
Asian Social Science , 2010, DOI: 10.5539/ass.v6n7p176
Abstract: This paper offers a definition of language iconicity. And it studies it from a fresh perspective--sociolinguistics. The paper discusses it from the following five sections: social class corresponds to language diversity; traditional concept corresponds to word order iconicity and syntactic iconicity; intimity or estrangement corresponds to lexicalization; regional varieties correspond to difference of dialect; politeness corresponds to the length of the sentence.
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