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Search Results: 1 - 10 of 85635 matches for " Chuan-Shui Liu "
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Two new glucosides from the pellicle of the walnut (Juglans regia)
Le Cai,Chuan-Shui Liu,Xiao-Wei Fu,Xiao-Jing Shen,Tian-Peng Yin,Ya-Bin Yang,Zhong-Tao Ding
Natural Products and Bioprospecting , 2012, DOI: 10.1007/s13659-012-0009-0
Abstract: A new α-tetralonyl glucoside, 6′-O-acetyl-juglanoside E (1), and a new dihydrophaseic acid glucoside, dihydrophaseic acid 1-O-(6-O-acetyl)-glucopyranoside (2), together with two known ones, juglanoside E (3) and dihydrophaseic acid (4), were isolated from the pellicle of the walnut (Juglans regia). The structures of the new compounds were elucidated by comprehensive spectroscopic analysis, including IR, HRESIMS, 1D and 2D NMR data.
Chronic ingestion of alcohol modulates expression of ubiquitin editing enzyme A20 in lung macrophages
Quan-Yong Huang, Yu-Chuan Chen, Shui-Ping Liu
Multidisciplinary Respiratory Medicine , 2011, DOI: 10.1186/2049-6958-6-6-364
Abstract: Mice were gavage-fed with 40% alcohol daily for 0-3 weeks. Airway macrophages were collected by lung lavage. Expression of ubiquitin editing enzyme A20 in isolated macrophages was assessed at both mRNA and protein levels. The endothelial barrier function of the lung was evaluated by the Evans blue method.Mice treated with alcohol for 3 weeks showed an increase in cell infiltration in the lung in response to exposure to peptidoglycan; over 80% of the infiltrated cells were macrophages. Furthermore, we observed that A20 level was suppressed in macrophages of mice treated with alcohol; the levels of tumor necrosis factor, interleukin-6 and nuclear factor kappa B in macrophage were increased. In addition, the endothelial barrier function of the lung was compromised, showing excessive infiltration of Evans blue in the lung indicating lung edema. Pretreatment with synthesized A20 inhibited alcohol-induced lung endothelial barrier dysfunction.We conclude that chronic alcohol ingestion disturbs the endothelial barrier function in the lung by modulating macrophage properties. Increase in A20 in the cell may have potential for the treatment of inflammatory disorders.Alcohol abuse is common in all social classes in the world [1]. Chronic consumption or acute excessive consumption of alcohol is harmful for important organs including the lung [2]. Although the absorbed alcohol is mainly metabolized in the liver, the unmetabolized portion enters the circulation and via pulmonary vessels reaches the lung where it affects its homeostasis or causes injury of local tissue [3]. It has been reported that the inhalation of alcohol compromises lung epithelial barrier function and induces lung edema [2]. The mechanism is not fully understood yet.Ubiquitination is a process that occurs in almost all biochemical activities of the body [4]. Ubiquitin editing enzyme A20 is one of the enzymes involved in the process of ubiquitination [5]. Under physiological conditions, A20 restricts the activ
BMP signaling in mesenchymal stem cell differentiation and bone formation  [PDF]
Maureen Beederman, Joseph D. Lamplot, Guoxin Nan, Jinhua Wang, Xing Liu, Liangjun Yin, Ruidong Li, Wei Shui, Hongyu Zhang, Stephanie H. Kim, Wenwen Zhang, Jiye Zhang, Yuhan Kong, Sahitya Denduluri, Mary Rose Rogers, Abdullah Pratt, Rex C. Haydon, Hue H. Luu, Jovito Angeles, Lewis L. Shi, Tong-Chuan He
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.68A1004
Abstract: Bone morphogenetic proteins (BMPs) are members of the TGF-β superfamily and have diverse functions during development and organogenesis. BMPs play a major role in skeletal development and bone formation, and disruptions in BMP signaling cause a variety of skeletal and extraskeletal anomalies. Several knockout models have provided insight into the mechanisms responsible for these phenotypes. Proper bone formation requires the differentiation of osteoblasts from mesenchymal stem cell (MSC) precursors, a process mediated in part by BMP signaling. Multiple BMPs, including BMP2, BMP6, BMP7 and BMP9, promote osteoblastic differentiation of MSCs both in vitro and in vivo. BMP9 is one of the most osteogenic BMPs, yet it is a poorly characterized member of the BMP family. Several studies demonstrate that the mechanisms controlling BMP9-mediated osteogenesis differ from other osteogenic BMPs, but little is known about these specific mechanisms. Several pathways critical to BMP9-mediated osteogenesis are also important in the differentiation of other cell lineages, including adipocytes and chondrocytes. BMP9 has also demonstrated translational promise in spinal fusion and bone fracture repair. This review will summarize our current knowledge of BMP-mediated osteogenesis, with a focus on BMP9, by presenting recently completed work which may help us to further elucidate these pathways.
Strongly Interacting Higgs Sector Without Technicolor
Liu, Chuan
High Energy Physics - Phenomenology , 2007,
Abstract: Several years ago, we proposed a modification of the Standard Model, in which the Higgs sector was stabilized by the addition of higher derivative operators, similar to Lee-Wick Electrodynamics. We studied this theory extensively, both using continuum Hamiltonian and path integral methods. We also reported detailed lattice studies of the higher derivative Higgs sector. In view of some recent revived interest in our original idea, we are providing here our extensive notes from the time period on this topic. The key results were already published in our papers at that time. The many additional details that we make available here were previously available only in Chuan Liu's UCSD Ph.D. thesis (1994). Very recently, our idea has been revived by other groups. In view of the renewed interest, and to perhaps correct some misconceptions in the literature, we are here making our original extensive notes available to the wider community.
A Lattice Study of the Glueball Spectrum
Chuan Liu
Physics , 2000, DOI: 10.1088/0256-307X/18/2/311
Abstract: Glueball spectrum is studied using an improved gluonic action on asymmetric lattices in the pure SU(3) gauge theory. The smallest spatial lattice spacing is about $0.08fm$ which makes the extrapolation to the continuum limit more reliable. In particular, attention is paid to the scalar glueball mass which is known to have problems in the extrapolation. Converting our lattice results to physical units using the scale set by the static quark potential, we obtain the following results for the glueball masses: $M_G(0^{++})=1730(90)MeV$ for the scalar glueball mass and $M_G(2^{++})=2400(95)MeV$ for the tensor glueball.
Hybrid Monte Carlo algorithm for lattice QCD with two flavors of dynamical Ginsparg-Wilson quarks
Chuan Liu
Physics , 1998, DOI: 10.1016/S0550-3213(99)00276-X
Abstract: We study aspects concerning numerical simulations of Lattice QCD with two flavors of dynamical Ginsparg-Wilson quarks with degenerate masses. A Hybrid Monte Carlo algorithm is described and the formula for the fermionic force is derived for two specific implementations. The implementation with optimal rational approximation method is favored both in CPU time and memory consumption.
Recent results from Lattice QCD
Chuan Liu
Physics , 2014, DOI: 10.1142/S2010194514602828
Abstract: Recent Lattice QCD results are reviewed with an emphasis on spectroscopic results concerning the charm quark. It is demonstrated that, with accurate computations from lattice QCD in recent years that can be compared with the existing or upcoming experiments, stringent test of the Standard Model can be performed which will greatly sharpen our knowledge on the strong interaction.
Accuracy Assessment of Thematic Classification Based on Point and Cluster Sample
遥感图像分类精度的点、群样本检验与评估

LIU Xu-long,HE Chun-yang,PAN Yao-zhong,YANG Ming-chuan,ZHANG Jin-shui,
刘旭拢
,何春阳,潘耀忠,杨明川,张锦水

遥感学报 , 2006,
Abstract: In order to assure the application of thematic classification,it is very important and necessary to make a rigorous accuracy assessment.In this paper,we use sampling-methods of point and cluster sample to assess the accuracy of the same region's land-use/land-cover thematic maps,which are derived from different resolution remote sensing data.Here,Sampling designs are consisted of simple random,systematic and stratified sampling.The results are as following.Firstly,the sampling design has great impact on the accuracy of remote sensing classification.There exists great randomicity on the result of points and cluster sample verification on the different Sampling design.On the same sampling design,the stability of point sample verification is higher than that of Cluster sample verification.Secondly,the average accuracy of different sampling designs of multi-point and multi-cluster sample verification can reflect the accuracy characteristic.During the course of point sample verification,stratified sampling's error is lower than others'.During the course of cluster sample verification,systematic sampling and stratified sampling's accuracy are prior to simple random sampling's.
The Relationship between Abnormity of Synaptonemal Complex and Male Fertility Impairment in Human
男性育性障碍与联会复合体异常的关系

LIU Jing-Yu,DAI Xiao-Hua,ZENG Xian-Lu,ZHANG Chuan-Shan,HAO Shui,SONG Yun-Chun,
刘静宇
,代小华,曾宪录,张传善,郝 水,宋运淳

遗传 , 2005,
Abstract: It was said that 11% of all men showed their infertility. The genetic origins of male infertility may be classified into three main groups: chromosome abnormalities, microdeletions and gene mutations. Growing literature has shown that spermatogenesis failure or reproductive failure (pregnancy wastages) occurred in male carriers of chromosomal distortion/aberration. But the mechanisms remain largely unsolved. Synaptonemal complex (SC) of human spermatocytes from such carriers offers new information. This review aims to summarize recent development of SC analysis for male infertile diagnosis and sum up our results obtained recently. The relationship between male infertility/sterility and SC abnormity was discussed and reviewed as following five aspects. (1)The association of XY-bivalent and the rearranged autosomes interfere with or affect, by their contact, X chromosome normal functions.(2)Male infertility is related to the incomplete pairing in break regions of rearranged autosomes.(3)SC fragmentation, lateral elements (LEs) swelling and pairing disorder result in spermatogenic failure.(4)This heterosynapsis at early stage of meiosis in rearranged autosomes, results in unbalanced germs and pregnancy wastages.(5)Gene mutations of SC proteins result in male infertility.
Effect of Interplanetary Matter on the Spin Evolutions of Venus and Mercury  [PDF]
Qingxiang Nie, Chuan Li, Fengshou Liu
International Journal of Astronomy and Astrophysics (IJAA) , 2011, DOI: 10.4236/ijaa.2011.11001
Abstract: Differs from other planets in the Solar System, the Venus has a retrograde and long-period rotation. To ex-plain the special spin of the Venus, mechanisms such as core mantle friction inside planet[1], atmospheric tide[2-7], or twain effects together[8-11], and impact with a giant object[12,13] have been suggested. These mecha-nisms, however, need specific initial conditions with a remote probability [3,5]. The slow spin of Mercury cannot be explained very well. One viewpoint is that the unusual spins of Venus and Mercury might be naturally evolved from similar initial states by interaction with interplanetary matter during long-time evolu-tion. Based on the theory of planet formation and the orderliness of planetary distance, we discuss the possi-bility that the radial density distribution of interplanetary matter is undulated, and the wave function satisfies the formal Schrödinger equation. We calculate the evolution of planet spins under the effect of interplanetary matter during planets revolution and rotation. The results show that planets can naturally evolve to the cur-rent state (particularly the negative spin of the Venus) given the similar initial quick and positive spins.
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