oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2017 ( 39 )

2016 ( 52 )

2015 ( 634 )

2014 ( 1007 )

自定义范围…

匹配条件: “ Xin Ge” ,找到相关结果约24681条。
列表显示的所有文章,均可免费获取
第1页/共24681条
每页显示
Late-onset Orbital Cellulitis with Abscess Formation Caused by Klebsiella Pneumoniae  [PDF]
Jing Li, Jianmin Ma, Xin Ge
Open Journal of Ophthalmology (OJOph) , 2012, DOI: 10.4236/ojoph.2012.23019
Abstract: Klebsiella pneumoniae is a facultative anaerobic gram-negative, non-motile, capsulated, gas-producing rod found widely in nature and often associated with urinary and respiratory infections in humans. Orbital cellulitis with abscess formation caused by K. pneumoniae is rare. Here, we present a case of K. pneumonia-inducing orbital cellulitis with abscess formation in a patient who had undergone an orbital wall fracture prosthesis with hydroxyapatite implantation due to orbital trauma 9 years ago. The patient was treated successfully with antibiotics and surgery.
Carbohydrate-Derived Organocatalysts for the Reduction of Imines with Trichlorosilane  [PDF]
Xin Ge, Chao Qian, Xinzhi Chen
Journal of Materials Science and Chemical Engineering (MSCE) , 2015, DOI: 10.4236/msce.2015.36008
Abstract:

The backbone of D-glucosamine hydrochloride was fine-tuned and modified by protecting the hydroxyl groups. In order to reduce imines with trichlorosilane, the carbohydrate-derived organocatalysts were prepared and screened. Methyl-4,6-O-benzylidene-2-amino-2-deoxy-α-D-glucopyr anoside was found as the best catalyst. The reduction was proceeded under CHCl3 as solvent at 40?C, affording 68% - 94% yield.

Role of Wnt canonical pathway in hematological malignancies
Xueling GE, Xin Wang
Journal of Hematology & Oncology , 2010, DOI: 10.1186/1756-8722-3-33
Abstract: Wnt canonical signaling pathway acts a significant part in embryonic development and in maintenance of organs and tissues in adults. In the past two decades, medical scientists have devoted themselves to understanding the cellular and molecular mechanisms of Wnt signaling. A lot of studies indicate that Wnt canonical pathway involves in the pathogenesis of a range of disease including many kinds of carcinomas. Hematological malignancies are the types of carcinoma that affect blood, bone marrow and lymph nodes. They may derive from either of the two major blood cell lineages: myeloid and lymphoid cell lines. The incidence of hematological malignancies has been increasing steadily in the world for the past years, but their etiology and pathogenesis has not been well understood involving areas of chromosome aberrations, apoptosis inhibition, abnormal activation of signaling pathways, angiogenesis, et al. In this review, we focus on the role of Wnt canonical signaling in carcinomas, especially in hematological malignancies, and then disclose potential therapeutic opportunities of this pathway in hematological malignancies.Wnt signaling pathways are categorized as "canonical "and "non-canonical" Wnt pathways, which are β-catenin-dependent and β-catenin-independent signaling pathways, respectively. Here we will emphatically point out the role of Wnt canonical pathway in hematological malignancies. A simplified model of Wnt canonical pathway is delineated in Fig. 1. Wnts is a group of secreted cysteine-rich glycoproteins, which includes at least 19 identified members in diverse species ranging from round worm and insects to human[1]. In the absence of a Wnt ligand binding to its receptor complex, the cytoplasmic β-catenin is degraded by the "destruction complex". In this complex, Axin acts as an scaffold protein, which adenomatous polyposis coli (APC), glycogen synthase kinase 3β (GSK-3β) and casein kinase 1α (CK1α) bind to facilitate the sequential phophorylation of β-cat
The Design of State Monitoring System Based on Complex Network
Xin Hou,Wenjie Ge
Information Technology Journal , 2012,
Abstract: The essence of the state monitoring for the electric power network is the pattern clustering of its operating state. This study introduces the research results of complex network, establishing the network model of fault diagnosis, converting the fault diagnosis for the electric power network into the detection problem of sub-network, realizing the state clustering by means of the block merging algorithms and the optimal rules functions. On this basis, a practical state monitoring system for the electric power network is designed which real-time collects the operating status data by the multi-sensor. The method based on complex network analysis is proved by the experiments to be effective in state classification and fault diagnosis for the electric power network.
The Study on the Hierarchy of Internet Router-Level Topology  [PDF]
Jun ZHANG, Hai ZHAO, Chao LI, Xin GE
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2009, DOI: 10.4236/ijcns.2009.24032
Abstract: Being a huge system, Internet topology structure is very complex. It can’t be treated as a plane simply, and its hierarchy must be analyzed. We used the k-core decomposition to disentangle the hierarchical structure of Internet Router-level topology. By analyzing the router-lever Internet topology measuring data from CAIDA (The Cooperative Association for Internet Data Analysis) ,we studied the characteristics of the nodes in the inner hierarchy and outer hierarchy respectively. The frequency-degree power law of the nodes which core-ness is lower and the regionally distribution of the nodes which coreness is higher were concluded. At last, the topology of every hierarchy was described by giving their figures. These descriptions can provide a valuable reference for modeling on the Internet topology.
Replication forks, chromatin loops and dormant replication origins
J Julian Blow, Xin Ge
Genome Biology , 2008, DOI: 10.1186/gb-2008-9-12-244
Abstract: It is critical that chromosomal DNA is precisely duplicated during S phase of the eukaryotic cell cycle, with no sections of DNA left unreplicated or replicated more than once. There is a considerable plasticity in this process because cells license many potential replication origins, of which only a small percentage are used in any one cell cycle, with the others remaining 'dormant'. This means that the usage of replication origins can change under different circumstances. For example, dormant replication origins can be activated when replication forks are inhibited to allow timely completion of the replication programme. A recent paper published in Nature by Courbet et al. [1] illustrates this plasticity of replication origin usage and shows that it is associated with longer-term changes to the organization of chromatin loops. The changes to chromatin organization can then directly affect the way that replication origins are used in subsequent cell cycles.The precise duplication of large eukaryotic chromosomes is a dauntingly complex task. For the DNA to be completely replicated, replication forks need to be initiated at thousands of replication origins scattered throughout the genome. This is made more difficult by the fact that replication forks can frequently stall, for example if they encounter damaged bases. It is also crucial that each replication origin does not fire more than once in a single S phase, as this would lead to local amplification of the DNA.During late mitosis and early G1, the cell licenses replication origins for use in the upcoming S phase by loading protein complexes composed of Mcm proteins (Mcm2-7 complexes) onto the origin DNA [2,3]. During S phase, Mcm2-7 at licensed origins can initiate replication forks. The Mcm2-7 complex moves with the replication forks, providing the essential DNA helicase activity that unwinds the DNA. This means that when an origin initiates a pair of forks, it is converted into the unlicensed state and cannot f
Poly[[diaqua(μ-4,4′-bipyridine N,N′-dioxide-κ2O:O′)(μ-terephthalato-κ2O1:O4)cobalt(II)] 4,4′-bipyridine N,N′-dioxide monosolvate]
Xin Ge,Shu-Yan Song
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812040056
Abstract: In the title compound, {[Co(C8H4O4)(C10H8N2O2)(H2O)2]·C10H8N2O2}n, the CoII atom, lying on an inversion center, is hexacoordinated in a distorted octahedral geometry defined by two O atoms from two terephthalate (tp) ligands, two O atoms from two 4,4′-bipyridine N,N′-dioxide (bpydo) ligands and two water molecules. The coordinated tp and bpydo ligands and uncoordinated bpydo molecule all have an inversion center. The CoII atoms are connected by the tp and bpydo ligands into a layer parallel to (111). In the crystal, O—H...O hydrogen bonds link the uncoordinated bpydo molecules and the layers into a three-dimensional supramolecular structure. Intralayer O—H...O hydrogen bonds and π–π interactions [centroid-to-centroid distances = 3.6643 (13) and 3.8048 (13) ] are also observed.
Evading Tactics of Psychological Contract Violations
Huiyuan Mao,Xin Liu,Hua Ge
Asian Social Science , 2009, DOI: 10.5539/ass.v4n11p26
Abstract: Nowadays, the theory of psychological contract is the focus of human resources research at home and abroad. With the transformation of economic pattern and globalization of world economy, the psychological contract in employment relationship has changed extremely, even has been broken and to be perceived as psychological contract violations. The present article analyzed psychological contract and psychological contract violations, putted forward some evading tactics.
Pasture Monitoring Using SAR with COSMO-SkyMed, ENVISAT ASAR, and ALOS PALSAR in Otway, Australia
Xin Wang,Linlin Ge,Xiaojing Li
Remote Sensing , 2013, DOI: 10.3390/rs5073611
Abstract: Because of all-weather working ability, sensitivity to biomass and moisture, and high spatial resolution, Synthetic aperture radar (SAR) satellite images can perfectly complement optical images for pasture monitoring. This paper aims to examine the potential of the integration of COnstellation of small Satellites for the Mediterranean basin Observasion (COSMO-SkyMed), Environmental Satellite Advanced Synthetic Aperture Radar (ENVISAT ASAR), and Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR) radar signals at horizontally emitted and received polarization (HH) for pasture monitoring at the paddock scale in order to guide farmers for better management. The pasture site is selected, in Otway, Victoria, Australia. The biomass, water content of grass, and soil moisture over this site were analyzed with these three bands of SAR images, through linear relationship between SAR backscattering coefficient, and vegetation indices Normalized Differential Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), Enhanced Vegetation Index (EVI)), together with soil moisture index (MI). NDVI, NDWI, and MI are considered as proxy of pasture biomass, plant water content, and soil moisture, respectively, and computed from optical images and climate data. SAR backscattering coefficient and vegetation indices are computed within a grass zone, defined by classification with MODIS data. The grass condition and grazing activities for specific paddocks are detectable, based on SAR backscatter, with all three wavelengths datasets. Both temporal and spatial analysis results show that the X-band SAR has the highest correlation to the vegetation indices. However, its accuracy can be affected by wet weather due to its sensitivity to the water on leaves. The C-band HH backscattering coefficient showed moderate reliability to evaluate biomass and water content of grass, with limited influence from rainfall in the dry season. The L-band SAR is the less accurate one for grass biomass measurement due to stronger penetration.
Some Improvements on Locally Repairable Codes
Jun Zhang,Xin Wang,Gennian Ge
Mathematics , 2015,
Abstract: The locally repairable codes (LRCs) were introduced to correct erasures efficiently in distributed storage systems. LRCs are extensively studied recently. In this paper, we first deal with the open case remained in \cite{q} and derive an improved upper bound for the minimum distances of LRCs. We also give an explicit construction for LRCs attaining this bound. Secondly, we consider the constructions of LRCs with any locality and availability which have high code rate and minimum distance as large as possible. We give a graphical model for LRCs. By using the deep results from graph theory, we construct a family of LRCs with any locality $r$ and availability $2$ with code rate $\frac{r-1}{r+1}$ and optimal minimum distance $O(\log n)$ where $n$ is the length of the code.
第1页/共24681条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.