Papers by Keyword: Carrier

Abstract: The article shows the process of preparing an oxide layer on the surface of titanium for use in industrial catalysis. Data from physical and chemical studies are presented, namely microhardness, porosity, thickness, specific surface area, adhesion and thermal stability of the active layer.To determine the physicochemical characteristics of the resulting oxide layer, the following analysis methods were used: X-ray diffraction analysis (XRD), X-ray diffraction phase analysis (XPA), X-ray absorption analysis (XRA), and X-ray fluorescence analysis. The thickness of the oxide layer depending on the duration of anodization was estimated by optical microscopy.

Abstract: This contribution deals with the issue of the weight absorption of bitumen waterproofing sheets. The aim is to determine which parameter the weight absorption depends on, according to the laboratory measurement and the statistical evaluation. This dependence is to be examined based on the results of the weight absorption achieved by the two different testing methodologies [1], [2]. The laboratory measurement was performed on bitumen waterproofing sheets used for waterproofing concrete bridge decks [3].

Abstract: This paper used double step compounding chitosan nanoparticles as carrier, took the virus's outer membrane NS1 shRNA delivery to cells,and simultaneous detection and characterization of chitosan-RNA Nanocomposites.The experiment results show that properties of chitosan-RNA nanocomposite is stable, using chitosan-RNA Nanocomposites as carrier carry shRNA transfecting B16-Blue INF-alpha/beta cells, shRNA can’t degradation by nuclear enzyme, improve cell absorbing and shRNA intracellular release.Experiments further confirmed that the chitosan - RNA Nanocomposites into the cell, NS1 shRNA is identified by RIG-I gene, induces gene expression of interferon, produces interferonItype, offers a new way for the application of new type of flu vaccine.

Abstract: A novel bimetallic nanoFe/Cu composite supported on expanded graphite (EG) was prepared through a synthesis procedure that includes consecutive steps of an incipient wetness impregnation method, heat treatment and borohydride reduction. SEM, XRD and ICP-OES were employed to characterize the morphology, crystallinity and metal contents respectively. The SEM images show that the metal particles are spherical and arrange closely but orderly, the particle size is uniform and no larger than 100 nm. The XRD data indicate the composite consists of elementary Fe and Cu deposited on the inert EG. Batch experiments with nitrate show that the composite works efficiently for nitrate reduction in wastewater without pH control. Although nitrite as much as 40% of the degraded nitrate persisted in the reaction system, nitrite as target pollutant has been found to be easily reduced to nitrogen with a selectivity of 99.9% at pH 6 by catalytic hydrogenation. Therefore, the composite EG-Fe/Cu will play an indirect role in nitrogen selectivity. Based on the environmental friendliness and the efficiency on nitrate, both EG and the composite may be considered into the experimental teaching of environmental chemistry course.

Abstract: A low-voltage distribution box with both energy monitoring and carrier communication capability is developed to collect , store and transmit multi-channel current, voltage , power, and electrical degree surveillance and other information, and the detail of its hardware design is described, ARM9 chip is used as a microcontroller, AD8364 with six channels is applied to ensure the speed and accuracy of data acquisition, the carrier chip ST7538 is adopted to transmit the acquired information to concentrator at specific time. The investment cost of the distribution box is low, and easy to be installed and maintained, and can be widely used in various industries for middle and small-sized enterprises.

Abstract: Selective Catalytic Reduction system (SCR) has made great contributions to diesel engine NOx control technology. The gas flow condition in exhaust pipe has a great effect on catalytic reduction reaction of SCR, especially the airflow through carriers. In this paper, CFD technology was used to simulate the internal flow field, and analyze the gas flow uniformity, which would give us reasonable suggestions to optimize the structure of SCR-Exhaust aftertreatment system.

Abstract: Analysls the general method of microorganism immobilization and the character of thc common used carrier;And study the removal efficiency using the immobilized microorganism grain to treat micro-polluted , analysis the influence of the carrier constrction on thc microorganism immobilization and the activity of tbe immobilized microorganism.

Abstract: In this paper, TiO₂/diatomite and Ce-TiO₂/diatomite were prepared by sol-gel method in order to improve the spectrum responding range and its photocatalytic effect. The obtained samples were characterized by means of X-ray Diffractometer (XRD), Scanning Electron Microscope (SEM), Infrared Absorption Spectroscopy (FT-IR) and so on, and the photocatalytic activity was evaluated by methylene blue degradation. The heat stability of TiO₂/diatomite was improved by Ce-doped; TiO₂ was successfully loaded on diatomite through physical and chemical action. The de-coloring ratio of methylene blue of the two composite materials were similar under UV light, Ce-TiO₂/diatomite was higher under visible light, it reached to 80%, and it kept 65% after the five times repeated using of Ce-TiO₂/diatomite.

Abstract: With cobalt-based catalyst loaded by Al₂O₃, TiO₂ and ZrO₂ as research objectives, in this paper, the performance of these cobalt-based catalysts in Fischer-Tropsch synthesis is discussed. Besides, BET, XRD, FTIR, TPR superficial characteristics and evaluation experiments have been carried out for these catalysts respectively, and the result shows that, the catalyst loaded by ZrO₂ has the highest catalytic activity, while the catalyst loaded by Al₂O₃ has the lowest catalytic activity. The catalyst with higher CO adsorption and dissolving capacity has higher activity; meanwhile, the higher reducibility the catalyst has, the higher the activity of the catalyst will be. In addition, catalyst methane selectivity loaded by Al₂O₃ is the highest, while catalyst methane selectivity loaded by TiO₂ is the lowest, which shows that the large pore structure of catalyst is good for heavy hydrocarbon production, meanwhile, formate species generated on the surface of catalyst implies that the formate species is involved in the generation of methane. Keywords.Carrier; cobalt-based catalyst; Fischer-Tropsch synthesis; performance

Abstract: This essay describes a new radio encryption technique among communication equipments, that is embed confidential information in normal carrier by using digital watermarking to achieve the purpose of protecting confidential information and confusing illegal interceptors. Meanwhile it also gives embed watermarking based on integration and Detection Algorithm.