In this study, the particle motion simulation and application exploration of three-stage cone water-only cyclone (TWOC) were performed. The discrete phase model was applied to simulate the particles ...motion during the separation process of TWOC. The particle distribution curve of light products of TWOC obtained by the simulation is well consistent with that of the validation experiment, demonstrating the credibility of the particles motion simulation. The separation characteristic of this cyclone was clarified. The cone part is the main separation region, and the axial separation position of particles is deepened with the growth of the particle density. The "T-F" flow, consisting of the TWOC separation and flotation, was designed to separate the coal-slime efficiently. The separation experiments indicate that the pyrite sulfur rejection rate and the ash rejection rate of the NO.1 experiment are all greater than 79.00%. The "C-T-F" flow, consisting of the crushing process and the "T-F" flow, was designed to improve the desulfuration performance of the high-sulfur lump-coal. The crushing size was determined as 3 mm, and the pyrite sulfur rejection rate of the "C-T-F" flow is greater than 90.00%. The superiorities of the two separation flows promote the practical application of TWOC.
A predictive Quantitative Structure-Property Relationship (QSPR) for the refractive indices of 370 solvents commonly used in the processing and analysis of polymers is presented, using as chemical ...information descriptors the simplified molecular input line entry system (SMILES). The model employs a flexible molecular descriptor and a conformation-independent approach. Various well-known techniques, such as the use of an external test set of compounds, the cross-validation method, and Y-randomization were used to test and validate the established equations. The predicted values were finally compared with published results from the literature. The simple model proposed correlates the refractive index values with good accuracy, and it is not dependent on 3D-molecular geometries.
•First report about polysaccharides interrupting the hepatocarcinoma related miRNA expression.•61 miRNAs were regulated significantly in miRNA expression of HepG2 suppressed by the GLP.•Differential ...expressions were observed in both of hepatocarcinoma and immune related miRNA.•miR-3131 with unknown function presented strong upregulation (92-folds, Log2=6.53, p=0.000016).
Medicinal mushroom polysaccharides such as Ganoderma lucidum polysaccharides (GLPs) have been commonly hypothesized to suppress tumor cells proliferation through immune effects. To verify this hypothesis through investigating comprehensive miRNA expression in polysaccharide treated cancer cells, an anticancer mycelia GLP was employed to disclose miRNA differential expression of human hepatocarcinoma cells (HepG2), by using a miRNA microarray assay based on Sanger miR-Base Release 16. The experiment and the analysis result indicates that among the 61 differential expressed miRNAs (p≤0.01), 17 of them were regulated significantly. GLP can inhibit HepG2 cells directly through regulation of hepatocarcinoma genes. A newly found miR-3131 exhibited the strongest upregulation (92-folds, Log2=6.53, p=0.000016). The miRNAs responded synergistically in both hepatocarcinoma and immune-related aspects.
The influence of a Mn layer on the magnetic properties of sputtered Pr–Fe–B/Mn films with Cu spacer layer has been investigated for various Mn layer thicknesses. The Pr–Fe–B/Mn films all possess ...perpendicular anisotropy. An enhancement of the intrinsic coercivity
i
H
c is observed for suitable Mn layer thickness and
i
H
c exhibits an oscillatory dependence on the thickness of the Mn layer with a period of about 60
nm. The average size of the columnar Pr
2Fe
14B grains is about 100
nm. A highest
iH
c value of 22.1
kOe and an optimal (
BH)
max value of 18.2
MGOe are reported for these Pr–Fe–B/Mn films.
•It is the first time that antioxidant property of water-soluble yellow mucilage (WSM) was evaluated.•WSM demonstrated the strongest antioxidant activity compared to the other two commercial ...polysaccharides, xanthan gum and citrus pectin.•No relationship was found between antioxidant property and uronic acid content, molecular weight, and apparent viscosity of polysaccharides.•WSM could be a novel ingredient in food industries due to its superior antioxidant activities compared to citrus pectin and xanthan gum.
The antioxidant properties of the water-soluble yellow mustard (Sinapis alba L.) mucilage (WSM) were compared with citrus pectin and xanthan gum using in vitro methods. The antioxidants ascorbic acid and butylated hydroxyanisole (BHA) were used as controls. The antioxidant activity, DPPH free radical scavenging ability, and reducing power on Fe were measured. Molecular weight (MW), uronic acid content, and viscosity for the three polysaccharides were obtained to investigate the relationships between the physicochemical properties and antioxidant activities of the three different polysaccharides. The results showed that the overall antioxidant activity of polysaccharides was lower than that for ascorbic acid and BHA. Of the three polysaccharides, WSM exhibited the strongest antioxidant properties, followed by citrus pectin and xanthan gum. Statistical analysis showed that the MW and uronic acid content had significant effects on antioxidant activity (P<0.05). MW, uronic acid and apparent viscosity had significant effects on reducing power on Fe (P<0.05). Concentration also significantly affected DPPH free radical scavenging effect and reducing power on Fe (P<0.05). The study indicated a great potential of using WSM as a novel ingredient in food industries due to its superior antioxidant activities compared to citrus pectin and xanthan gum.
Octopus in the family Octopodidae (Mollusca: Cephalopoda) has been generally recognized as a "catch-all" genus. The monophyly of octopus species in China's coastal waters has not yet been studied. In ...this paper, we inferred the phylogeny of 11 octopus species (family Octopodidae) in China's coastal waters using nucleotide sequences of two mitochondrial DNA genes: cytochrome c oxidase subunit I (COI) and 16S rRNA. Sequence analysis of both genes revealed that the 11 species of Octopodidae fell into four distinct groups, which were genetically distant from one another and exhibited identical phylogenetic resolution. The phylogenies indicated strongly that the genus Octopus in China's coastal waters is also not monophyletic, and it is therefore clear that the Octopodidae systematics in this area requires major revision. It is demonstrated that partial sequence information of both the mitochondrial genes 16S rRNA and COI could be used as diagnostic molecular markers in the identification and resolution of the taxonomic ambiguity of Octopodidae species.
► Structural properties of sterculia APS was investigated. ► Partial acid hydrolysis, methylation analysis and 1D/2D NMR spectroscopy were used. ► A possible structure of APS was proposed.
The ...chemical structure of a water-soluble pectic polysaccharide (sterculia APS) isolated from boat-fruited sterculia seeds (Semen Sterculiae Lychnophorae) was elucidated using partial acid hydrolysis, methylation analysis and 1D/2D nuclear magnetic resonance (NMR) spectroscopy. The results of partial acid hydrolysis revealed that sterculia APS contained galacturonic acids and rhamnose units in the backbone, and arabinose, galactose and xylose residues in the branched chains. Combined the methylation analysis results with NMR spectroscopy, a possible structure of APS was proposed as follow: the backbone consisted of the homogalacturonan (HG) named “smooth” regions by linear linkage of 1,4-α-d-GalpA, and the rhamnogalacturonan-I (RG-I) called “hairy” ones by the linkage of →4)-α-d-GalpA-(1→2)-α-l-Rhap-(1→partially substituted at O-4 of rhamnose units. The GalpA residues were partially methyl esterified and O-acetylated on C-2 and/or C-3. The side chains were mainly composed of araban and arabinogalactan by the linkages of T-, 1,3-, 1,5-l-Araf and T-, 1,4-, 1,6-, 1,3,6-, 1,3,4-d-Galp, attached to O-4 of the backbone rhamnose units.
Advances in the three-dimensional hydroelasticity of ships Wu, Y-S; Cui, W-C
Proceedings of the Institution of Mechanical Engineers. Part M, Journal of engineering for the maritime environment,
09/2009, Letnik:
223, Številka:
3
Journal Article
Recenzirano
The study of hydroelasticity of ships first gained momentum in the late 1970s with the work of Bishop and Price, who established the two-dimensional (2D) hydroelasticity theory of ships. The concept ...and basic principle presented in their work to embody the structure and the surrounding fluid as a coupled entirety was further employed and extended in the creation of the general linear three-dimensional (3D) theory of hydroelasticity for an arbitrary shaped flexible marine structure travelling with a forward speed in a seaway in the middle of 1980s (Wu, 1984; Price and Wu, 1985a; Bishop et al., 1986). Since then, great progress has been achieved in the development and application of 3D hydroelasticity theories. These include the more rigorous methods of frequency-domain linear analysis accounting for the forward speed effect and the steady flow effect, the time-domain linear 3D theory, the non-linear 3D theory and the numerical methods for a floating structure travelling in rough seas with large motions, experimental techniques of 3D flexible ship models, the hydroelasticity-based design and safety assessment, etc. This paper presents an overview of these developments and achievements of linear and non-linear 3D hydroelasticity theories of ships, and the corresponding numerical and experimental techniques.
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