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Search Results: 1 - 10 of 6335 matches for " Dongliang Ge "
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Hydrogen Absorption and Electrochemical Properties of As-Quenched Nanocrystalline Mg20Ni10 – xCux (x = 0 – 4) Alloys  [PDF]
Jinliang Gao, Zhonghui Hou, Qilu Ge, Dongliang Zhao, Shihai Guo, Yanghuan Zhang
Materials Sciences and Applications (MSA) , 2010, DOI: 10.4236/msa.2010.13027
Abstract: Nanocrystalline Mg2Ni-type alloys with nominal compositions of Mg20Ni10 – xCux (x = 0, 1, 2, 3, 4) were synthesized by rapid quenching technique. The microstructures of the as-cast and quenched alloys were characterized by XRD, SEM and HRTEM. The hydrogen absorption and desorption kinetics of the alloys were measured using an automatically controlled Sieverts apparatus. The electrochemical hydrogen storage performances were tested by an automatic galvanostatic system. The results show that all the as-quenched alloys hold a typical nanocrystalline structure, and the rapid quenching does not change the major phase Mg2Ni. The hydrogen absorption and desorption capacities of the alloys significantly increase with rising quenching rate. Additionally, the rapid quenching significantly improves the electrochemical hydrogen storage capacity of the alloys, but it slightly impairs the cycle stability of the alloys.
Preparation and characterization of CuO nanowire arrays
CuO纳米线阵列的制备与特性

Yu Dongliang,Ge Chuannan,Du Youwei,
于冬亮
,葛传楠,都有为

半导体学报 , 2009,
Abstract: CuO nanowire arrays were prepared by oxidation of copper nanowires embedded in anodic aluminum oxide (AAO) membranes. The AAO was fabricated in an oxalic acid at a constant voltage. Copper nanowires were formed in the nanopores of the AAO membranes in an electrochemical deposition process. The oxidized copper nanowires at different temperatures were studied. X-ray diffraction patterns confirmed the formation of a CuO phase after calcining at 500 ?C in air for 30 h. A transmission electron microscopy was use...
Genetic Regulation of α-Synuclein mRNA Expression in Various Human Brain Tissues
Colton Linnertz,Laura Saucier,Dongliang Ge,Kenneth D. Cronin,James R. Burke,Jeffrey N. Browndyke,Christine M. Hulette,Kathleen A. Welsh-Bohmer,Ornit Chiba-Falek
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0007480
Abstract: Genetic variability across the SNCA locus has been repeatedly associated with susceptibility to sporadic Parkinson's disease (PD). Accumulated evidence emphasizes the importance of SNCA dosage and expression levels in PD pathogenesis. However whether genetic variability in the SNCA gene modulates the risk to develop sporadic PD via regulation of SNCA expression remained elusive. We studied the effect of PD risk-associated variants at SNCA 5′ and 3′regions on SNCA-mRNA levels in vivo in 228 human brain samples from three structures differentially vulnerable to PD pathology (substantia-nigra, temporal- and frontal-cortex) obtained from 144 neurologically normal cadavers. The extensively characterized PD-associated promoter polymorphism, Rep1, had an effect on SNCA-mRNA levels. Homozygous genotype of the ‘protective’, Rep1-259 bp allele, was associated with lower levels of SNCA-mRNA relative to individuals that carried at least one copy of the PD-risk associated alleles, amounting to an average decrease of ~40% and >50% in temporal-cortex and substantia-nigra, respectively. Furthermore, SNPs tagging the SNCA 3′-untranslated-region also showed effects on SNCA-mRNA levels in both the temporal-cortex and the substantia-nigra, although, in contrast to Rep1, the ‘decreased-risk’ alleles were correlated with increased SNCA-mRNA levels. Similar to Rep1 findings, no difference in SNCA-mRNA level was seen with different SNCA 3′SNP alleles in the frontal-cortex, indicating there is brain-region specificity of the genetic regulation of SNCA expression. We provide evidence for functional consequences of PD-associated SNCA gene variants in disease relevant brain tissues, suggesting that genetic regulation of SNCA expression plays an important role in the development of the disease.
Performance Analysis for Large-Scale Parallel Microscopic Traffic Simulation System
Yin Fei,Zhang Dongliang
International Journal of Distributed Sensor Networks , 2009, DOI: 10.1080/15501320802575112
Abstract: PMTS (Parallel Microscopic Traffic Simulation) is a large-scale microscopic traffic network simulation system using a real traffic network of Shanghai, China. It describes traffic events in object oriented mode, uses MPI (Message Passing Interface) as communicate middleware, partitions the simulation traffic network into subnetworks, and runs simulations of subnetworks concurrently on a cluster of processors connected by high-speed Ethernet. To optimize the performance of PMTS, a number of challenges need to be solved, including traffic network partition, subnetworks communication and synchronization, and workload balance.
MORPHOLOGY OF SUB-CRITICAL GROWTH ON STRESS CORROSION CRACKING AND PLASTIC ZONE AT CRACK TIP

Lin Dongliang,

金属学报 , 1981,
Abstract: Using polished cantilever specimens made of two high strength steels 40CrNiMoA and AISI4330M, the nucleation and propagation on stress corrosion cracking in distilled water have been traced by metallographie shadowing technique. The morphology of sub-critical crack growth has also been observed. It was indicated that the shadow zone, i.e. a plastic deformation area in the front of crack tip, reveals. its different morphologies in various steels. In 40CrNiMoA, the shadow zone grows and joins one another with the crack propagation. In 4330M, it does not join together, but develop along two parallel paths. The catlike shadow zone immediately appeared at the crack tip after loading can be considered as the plastic zone at the crack tip. However, the shadow zone hereafter observed during whole process of the crack propagation seems not to present the plastic zone at the crack, but to represent the deformation induced by. the formation of shear lip and can be related closely to the pop-in. This should be distinguished from the plastic zone at the crack tip in the linear elastic fracture mechanics.
ROLE OF SOLUTION TREATMENT IN IMPROVING THE CREEP STRENGTH OF A DIRECTIONALLY SOLIDIFIED NICKEL-BASE SUPERALLOY

Lin Dongliang,

金属学报 , 1981,
Abstract:
Tunable Lateral Shift Through Nonlinear Composites of Nonspherical Particles
Dongliang Gao;Lei Gao
PIER , 2009, DOI: 10.2528/PIER09102404
Abstract: The Goos-Hanchen (GH) shift of the reflected waves from nonlinear nanocomposites of interleaved nonspherical metal and dielectric particles are investigated both theoretically and numerically. First, based on spectral representation theory and effective medium approximation, we derive the field-dependent effective permittivity of the nonlinear composites. Then the stationary phase method is adopted to study the GH shifts from nonlinear composites. It is found that for a given volume fraction, there exist two critical polarization factors and , and bistable GH shifts appear only when < or < . Moreover, both giant negative and positive GH shifts accompanied with large reflectivity are found, hence they can be easily observed in experiments. The reversal of the GH shift may be controlled by adjusting both the incident angle and the applied field. Numerical simulations for Gaussian-type incident beam are performed, and good agreement between simulated data and theoretical ones is found especially for large waist width.
Mannitol and Sorbitol Improve Uniformity of Adventitious Shoots Regeneration in Echinacea purpurea L. Moench  [PDF]
Xiaolu Chen, Dongliang Li, Yuesheng Yang, Hong Wu
Journal of Biomedical Science and Engineering (JBiSE) , 2016, DOI: 10.4236/jbise.2016.910B008
Abstract:
Mannitol or sorbitol was added into the Murashige and Skoog (MS) medium contain-ing certain concentrations of 6-Benzyladenine (BA) which was used to induce adventi-tious buds of Echinacea purpurea L. Results showed that the induced adventitious buds growing from medium added with 15 g·L-1 mannitol or sorbitol of the same con-centration were more consistent in height. The regeneration rates in MS medium containing 0.2 mg·L-1 BA and 15 g·L-1 mannitol were increased, while in MS medium containing 0.2 and 0.5 mg·L-1 BA, and 15 g·L-1 sorbitol, the regeneration rates were suppressed. On the other hand, genotype of explants and the concentration of BA in-fluenced the incidence of hyperhydricity, and the hyperhydricity of regenerated buds was more severe when the petiole explants were inoculated on medium with 15 g·L-1 mannitol or 15 g·L-1 sorbitol. The present study offers new possibility to the production of uniform plantlets
Characteristics Analysis on Short-Time Heavy Rainfall during the Flood Season in Shanxi Province, China  [PDF]
Xiaoting Tian, Dongliang Li, Jinhong Zhou, Yaqing Zhou, Zexiu Zhang
Journal of Geoscience and Environment Protection (GEP) , 2019, DOI: 10.4236/gep.2019.73011
Abstract: In order to provide a reference for the correct forecasting of short-term heavy rainfall and better disaster prevention and mitigation services in Shanxi Province, China, it is very important to carry out systematic research on short-term heavy precipitation events in Shanxi Province. Based on hourly precipitation data during the flood season (May to September) from 109 meteorological stations in Shanxi, China in 1980-2015, the temporal and spatial variation characteristics of short-time heavy rainfall during the flood season are analyzed by using wavelet analysis and Mann-Kendall test. The results show that the short-time heavy rainfall in the flood season in Shanxi Province is mainly at the grade of 20 - 30 mm/h, with an average of 97 stations having short-time heavy rainfall each year, accounting for 89% of the total stations. The short-time heavy rainfall mainly concentrated in July and August, and the maximal rain intensity in history appeared at 23 - 24 on June 17, 1991 in Yongji, Shanxi is 91.7 mm/h. During the flood season, the short-time heavy rainfalls always occur at 16 - 18 pm, and have slightly different concentrated time in different months. The main peaks of June, July and August are at 16, 17 and 18 respectively, postponed for one hour. Short-time heavy rainfall overall has the distribution that the south is more than the north and the east less than the west in Shanxi area. In the last 36 years, short-time heavy rainfall has a slight increasing trend in Shanxi, but not significant. There is a clear 4-year period of oscillation and inter-decadal variation. It has a good correlation between the total precipitation and times of short-time heavy rainfall during the flood season.
Tissue-Specific Genetic Control of Splicing: Implications for the Study of Complex Traits
Erin L. Heinzen,Dongliang Ge,Kenneth D. Cronin,Jessica M. Maia,Kevin V. Shianna,Willow N. Gabriel,Kathleen A. Welsh-Bohmer,Christine M. Hulette,Thomas N. Denny,David B. Goldstein
PLOS Biology , 2012, DOI: 10.1371/journal.pbio.1000001
Abstract: Numerous genome-wide screens for polymorphisms that influence gene expression have provided key insights into the genetic control of transcription. Despite this work, the relevance of specific polymorphisms to in vivo expression and splicing remains unclear. We carried out the first genome-wide screen, to our knowledge, for SNPs that associate with alternative splicing and gene expression in human primary cells, evaluating 93 autopsy-collected cortical brain tissue samples with no defined neuropsychiatric condition and 80 peripheral blood mononucleated cell samples collected from living healthy donors. We identified 23 high confidence associations with total expression and 80 with alternative splicing as reflected by expression levels of specific exons. Fewer than 50% of the implicated SNPs however show effects in both tissue types, reflecting strong evidence for distinct genetic control of splicing and expression in the two tissue types. The data generated here also suggest the possibility that splicing effects may be responsible for up to 13 out of 84 reported genome-wide significant associations with human traits. These results emphasize the importance of establishing a database of polymorphisms affecting splicing and expression in primary tissue types and suggest that splicing effects may be of more phenotypic significance than overall gene expression changes.
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