Dysbiosis of gut microbiota, injury of intestinal mucosal barrier and BT occurred as liver cirrhosis progressed, which might enhance inflammation and aggravate liver injury. AS may have other non-antimalarial effects that modulate gut microbiota, inhibit BT and alleviate inflammation, resulting in a reduction in CCl4, alcohol and high fat-caused damages to the liver and intestine.
In order to improve the performance of gypsum mould, dry grinding process was applied to the pretreatment of gypsum powder and the effect of the ball-milling time on the performance of gypsum powders was mainly studied in our work. X-Ray powder diffraction (XRD) and scanning electron microscope (SEM) were employed to characterize the phase compositions and microstructures of gypsum mould. The results show that the initial and final setting time of gypsum slurry reduces with the increasing of ball-milling time. But the initial and final setting time changed slightly when the ball-milling time was extended to 1 hour or more. Furthermore, the water absorption of gypsum moulds made by the pre-grinded gypsum powders was increased by 42.0 percent in the case of 2 hours’ grinding time, yet the flexual strength of the mould was slightly decreased by 12.5 percent. The main phase of gypsum powder was unchanged, but decrystallization degree increased after dry grinding process. Meanwhile, the crystal orientation and particle aggregation of the gypsum powders were destroyed, and the particle length of that was shortened. As a result, the gypsum moulds obtained by the as-treated gypsum powders have high porosity and water absorption.
In this study, we converted high silicon fly ashes (FA) to zeolites using a two stages conversion process: alkaline fusion followed by hydrothermal crystallization. The orthogonal experimental method was applied to design the experimental variables of alkaline fusing and hydrothermal crystallizing procedure. Alkaline fusion prior to hydrothermal synthesis was applied to collapse the FA crystalline phases and release Si content. Different from most of the research, the mixtures of NaOH and Na2CO3were used to increase the fusion temperature in order to remove the residue carbon simultaneously. Acid solubility was used to evaluate the efficiency of alkaline fusion. Then the optimized alkali-fused FA was resolved in the NaOH solutions and the experiment conditions were designed by the orthogonal experimental method. XRD and SEM were employed to characterize the crystalline phases and microimages of the raw FA and the treated FA. Adsorption process of methylene blue was applied to simulate the adsorption ability of the fly ash zeolites. Finally, the optimized conditions of alkaline fusion and hydrothermal treatment were concluded.
Using potassium carbonate, ammonium phosphate, zirconium dioxide, and cobalt oxide as raw materials, a kind of potassium zirconium phosphate ceramic pigments with bright purple color at high temperature were obtained through a series of optimizing experiments. It’s a novel type of ceramic pigments with chromaticity indexes of L*=55.37, a*=18.52, and b*=-30.56. X-ray diffraction (XRD), TG-DTA and chroma analysis were employed to characterize the pigments. The results reveal that potassium zirconium phosphate type ceramic pigments presenting bright purple color is due to Co2+ partially replace Zr4+ in potassium zirconium phosphate crystal lattice, which leads to the lattice distortion because of the formation of Zr2-xCo2x(PO4)3 phase. Moreover, owing to the limitation of solubility of Co2+ in potassium zirconium phosphate crystal lattice, the contents of cobalt oxide added may not be too much.
Titania nanotube arrays were fabricated by anodic oxidation of a pure titanium foil. The morphology, structure and optical properties of the nanotube arrays were characterized by SEM, XRD and UV-Vis spectrum. The effect of anodic oxidation parameters on the morphology was investigated. The growth mechanism of the titania nanotube arrays was discussed. The results show that the vertical oriented TiO2 nanotube arrays can be obtained at 20V for 60min in 0.5wt%HF+1mol/L H3PO4 solution. The aperture size of nanotube is 60nm~80nm and the thickness of tube wall is about 10nm. The spectral absorptivity of TiO2 nanotube arrays membrane calcined at 600°C towards ultravlolet light 349.7nm and visible light 443.9nm was relatively higher. It is also found that the crystal structure is greatly affected by calcining temperature.
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