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Search Results: 1 - 10 of 32695 matches for " Shaohai Guo "
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Quantitative Analysis Method of the Tea Saponin  [PDF]
Menghao Du, Shaohai Guo, Jinping Zhang, Lisong Hu, Mingze Li
Open Journal of Forestry (OJF) , 2018, DOI: 10.4236/ojf.2018.81005
Abstract: In this study, the detection method of tea saponin has been studied firstly. Determining the maximum absorption wavelength is 540 nm. Standard curve equation is y = 0.0015x - 0.0885. The correlation coefficient r = 0.9983 (p < 0.01). The relative standard deviation is 1.13%. Reclaimable rate of adding standard sample is 89.5% - 97.7%. Comparing vanille-sulfuric acid of gravimetric determination, the maximum deviation is 3.27%, indicating that vanille-sulfuric acid method is worth of quantitative analysis of tea saponin.
Sr, Nd and Pb isotopic characteristics of granulite and pyroxenite xenoliths from Hannuoba Basalts in five-dimensional space and their geological implications
Guohui Zhang,Xinhua Zhou,Shaohai Chen,Min Sun
Chinese Science Bulletin , 1999, DOI: 10.1007/BF03182727
Abstract: Sr, Nd and Pb isotopic characteristics of granulite and pyroxenite xenoliths from Hannuoba Basalts in five-dimensional space are studied. Combined with the distribution of xenoliths, it is suggested that the isotopic relationship between various xenoliths can be well explained by the processes of delamination.
Sr,Nd and Pb isotopic characteristics of granulite and pyroxenite xenoliths from Hannuoba Basalts in five-dimensional space and their geological implications

Guohui Zhang,Xinhua Zhou,Shaohai Chen,Min Sun,

科学通报(英文版) , 1999,
Abstract: Sr, Nd and Pb isotopic characteristics of granulite and pyroxenite xenoliths from Han-nuoba Basalts in five-dimensional space are studied. Combined with the distribution of xenoliths, it is suggested that the isotopic relationship between various xenoliths can be well explained by the processes of delamination.
Trace element characteristics in the diopsides of peridotite xenoliths: a laser ablation-inductively coupled plasma-mass spectrometry study
Shaohai Chen,Xinghua Zhou,S. Y. O’Reilly,W. L. Griffin,Guohui Zhang,M. Zhang
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02883644
Abstract: Among the various xenoliths entrained by the Cenozoic Hannuoba basalts, peridotite is the most abundant one. The trace elements of the diopsides from the peridotite xenoliths were analysed by LA-ICP-MS. The overall depletion and some heterogeneity of the continental mantle beneath northern North China Craton were indicated by the characteristics of the trace elements. The ΣREE amount in diopside correlates with the Cr/(Cr + Al) ratio of diopside which is indicative of xenolith’s partial melting degree. An the peridotite hosts and pyroxenite veins show similar REE distribution patterns, the composite xenoliths are probably formed by mantle deformation, rather than by the late metasomatism of mantle fluids/melts.
3D reconstruction algorithm based on 1D complex range data of radar
基于雷达复杂1维距离数据的3维重建算法

Zhang Yingkang,Hu Shaohai,Xiao Yang,
张颖康
,胡绍海,肖扬

中国图象图形学报 , 2011,
Abstract: Based on the geometry invariance of the rigid target during its 3D motion,the target's unknown 3D shape and motion can be reconstructed using scatterers of the 1D range extracted from the range image sequence of the single-antenna radar.For this geometric reconstruction of 1D-to-3D,we propose a 3D reconstruction algorithm for the shape and motion of the radar rigid target.The reconstruction can be realized using the complex 1D range data of the scatterers and the bundle adjustment for the target's reconstru...
Trace element characteristics in the diopsides of peridotite xenoliths: a laser ablation-inductively coupled plasma-mass spectrometry study

Shaohai Chen,Xinghua Zhou,S Y O’Reilly,W L Griffin,Guohui Zhang,M Zhang,

科学通报(英文版) , 1998,
Abstract: Among the various xenoliths entrained by the Cenozoic Hannuoba basalts, peridotite is the most abundant one. The trace elements of the diopsides from the peridotite xenoliths were analysed by LA-ICP-MS. The overall depletion and some heterogeneity of the continental mantle beneath northern North China Craton were indicated by the characteristics of the trace elements. The ΣREE amount in diopside correlates with the Cr/(Cr + Al) ratio of diopside which is indicative of xenolith’s partial melting degree. An the peridotite hosts and pyroxenite veins show similar REE distribution patterns, the composite xenoliths are probably formed by mantle deformation, rather than by the late metasomatism of mantle fluids/melts.
A Potential Relationship among Beta-Defensins Haplotype, SOX7 Duplication and Cardiac Defects
Fei Long, Xike Wang, Shaohai Fang, Yuejuan Xu, Kun Sun, Sun Chen, Rang Xu
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0072515
Abstract: Objective To determine the pathogenesis of a patient born with congenital heart defects, who had appeared normal in prenatal screening. Methods In routine prenatal screening, G-banding was performed to analyse the karyotypes of the family and fluorescence in situ hybridization was used to investigate the 22q11.2 deletion in the fetus. After birth, the child was found to be suffering from heart defects by transthoracic echocardiography. In the following study, sequencing was used to search for potential mutations in pivotal genes. SNP-array was employed for fine mapping of the aberrant region and quantitative real-time PCR was used to confirm the results. Furthermore, other patients with a similar phenotype were screened for the same genetic variations. To compare with a control, these variations were also assessed in the general population. Results The child and his mother each had a region that was deleted in the beta-defensin repeats, which are usually duplicated in the general population. Besides, the child carried a SOX7-gene duplication. While this duplication was not detected in his mother, it was found in two other patients with cardiac defects who also had the similar deletion in the beta-defensin repeats. Conclusion The congenital heart defects of the child were probably caused by a SOX7-gene duplication, which may be a consequence of the partial haplotype of beta-defensin regions at 8p23.1. To our knowledge, this is the first congenital heart defect case found to have the haplotype of beta-defensin and the duplication of SOX7.
Granulocyte/Macrophage Colony-Stimulating Factor Influences Angiogenesis by Regulating the Coordinated Expression of VEGF and the Ang/Tie System
Jingling Zhao, Lei Chen, Bin Shu, Jinming Tang, Lijun Zhang, Julin Xie, Shaohai Qi, Yingbin Xu
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0092691
Abstract: Granulocyte/macrophage colony-stimulating factor (GM-CSF) can accelerate wound healing by promoting angiogenesis. The biological effects of GM-CSF in angiogenesis and the corresponding underlying molecular mechanisms, including in the early stages of primitive endothelial tubule formation and the later stages of new vessel maturation, have only been partially clarified. This study aimed to investigate the effects of GM-CSF on angiogenesis and its regulatory mechanisms. Employing a self-controlled model (Sprague-Dawley rats with deep partial-thickness burn wounds), we determined that GM-CSF can increase VEGF expression and decrease the expression ratio of Ang-1/Ang-2 and the phosphorylation of Tie-2 in the early stages of the wound healing process, which promotes the degradation of the basement membrane and the proliferation of endothelial cells. At later stages of wound healing, GM-CSF can increase the expression ratio of Ang-1/Ang-2 and the phosphorylation of Tie-2 and maintain a high VEGF expression level. Consequently, pericyte coverages were higher, and the basement membrane became more integrated in new blood vessels, which enhanced the barrier function of blood vessels. In summary, we report here that increased angiogenesis is associated with GM-CSF treatment, and we indicate that VEGF and the Ang/Tie system may act as angiogenic mediators of the healing effect of GM-CSF on burn wounds.
Conditioned Medium from Hypoxic Bone Marrow-Derived Mesenchymal Stem Cells Enhances Wound Healing in Mice
Lei Chen, Yingbin Xu, Jingling Zhao, Zhaoqiang Zhang, Ronghua Yang, Julin Xie, Xusheng Liu, Shaohai Qi
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0096161
Abstract: Growing evidence indicates that bone marrow-derived mesenchymal stem cells (BM-MSCs) enhance wound repair via paracrine. Because the extent of environmental oxygenation affects the innate characteristics of BM-MSCs, including their stemness and migration capacity, the current study set out to elucidate and compare the impact of normoxic and hypoxic cell-culture conditions on the expression and secretion of BM-MSC-derived paracrine molecules (e.g., cytokines, growth factors and chemokines) that hypothetically contribute to cutaneous wound healing in vivo. Semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR) and enzyme-linked immunosorbent assay (ELISA) analyses of normoxic and hypoxic BM-MSCs and their conditioned medium fractions showed that the stem cells expressed and secreted significantly higher amounts of basic fibroblast growth factor (bFGF),vascular endothelial growth factor A (VEGF-A) interleukin 6 (IL-6) and interleukin 8 (IL-8) under hypoxic conditions. Moreover, hypoxic BM-MSC-derived conditioned medium (hypoCM) vs. normoxic BM-MSC-derived conditioned medium (norCM) or vehicle control medium significantly enhanced the proliferation of keratinocytes, fibroblasts and endothelial cells, the migration of keratinocytes, fibroblasts, endothelial cells and monocytes, and the formation of tubular structures by endothelial cells cultured on Matrigel matrix. Consistent with these in vitro results, skin wound contraction was significantly accelerated in Balb/c nude mice treated with topical hypoCM relative to norCM or the vehicle control. Notably increased in vivo cell proliferation, neovascularization as well as recruitment of inflammatory macrophages and evidently decreased collagen I, and collagen III were also found in the hypoCM-treated group. These findings suggest that BM-MSCs promote murine skin wound healing via hypoxia-enhanced paracrine.
Petrological Investigations on the Granulite Xenoliths from Hannuoba Basalts, Northern Sino-Korean Craton
汉诺坝玄武岩中麻粒岩类捕掳体的岩石学特征

Chen Shaohai,Zhang Guohui,Zhou Xinhua,Sun Min,Feng Jialin,Xie Manze,
陈绍海
,张国辉,周新华,孙敏,冯家麟,谢漫泽

岩石学报 , 1998,
Abstract: 根据矿物组合特征,汉诺坝玄武岩中的麻粒岩捕掳体可划分为四种类型:长英质麻粒岩、苏长质麻粒岩、二辉二长麻粒岩和二辉麻粒岩,其中以二辉麻粒岩最为常见。麻粒岩捕掳体均具变质重结晶结构以及块状或条带状构造。不同种类的麻粒岩捕掳体在矿物组成和矿物成分上存在明显差别,但各主要矿物之间存在一定的成分相关性。应用Wood和Banno二辉石温度计的计算结果表明,含二辉石麻粒岩捕掳体的平衡温度分布于800°~950℃之间,主要集中于900°±50℃范围内,具Opx+Cpx+Pl矿物组合的二辉麻粒岩捕掳体的形成压力范围约为0.6~1.1GPa。二辉二长麻粒岩落在相似的温压范围内。麻粒岩捕掳体在950℃处的突然消失指示了第三纪时汉诺坝地区岩石学壳幔边界的温度。
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