Applied Mechanics and Materials Vols. 217-219

Abstract: White mud is a kind of solid waste from the papermaking process, because of the high pH value and desulfurization material, it can be used as a desulfurization agent. Coal slury is the waste from the coal washing process and generally be used as fuel. This paper studies the hybrid method for white mud and coal slurry to be transported by pipeline, and the furnace desulfurization effect with the mixture. Rheological properties of coal slury and white mud was analyzed, and then based on the rheological data the coal slurry, white mud and water mixed strategy was obtained. By altering calcium sulfur ratio and operation parameters of boiler, fluidizing bed boiler desulphurization effect was tested with the mixture, the economic analysis was also performed through comparision of operational cost. The result shows that the proposed hybrid method is not only relatively simple, but also has the characteristics of good desulfurization effect, high desulfurization efficiency, and good economy. The study has important guiding meaning for desulphurization of coal slurry fluidized bed boiler.

Abstract: Combining with the influential index system of yeast transformation experiment, ANP method was adopted to solve the strategy improvement problem of yeast transformation experiment. Based on conclusion of existed study, the influential index system of yeast transformation experiment is developed combining with the fundamental experiments and interviews of experts in such fields. Then based on ANP theory, comparison of influential factors in the yeast transformation experiments is made, and strategies of improving the experiment are obtained in order to achieve economical goal. Adopting such system and method in the yeast transformation experiment, the number of such experiment could be effectively reduced and thus the cost of the whole experiment, and also the effect of the experiment are good, so the theory and method could be used in the familiar experiment.

Abstract: The research of our group focus on the studies of fentanyl analogues, which have potent analgesics free of side effects. Firstly, homology modeling, molecular docking, pharmacophore mapping, comparative molecular force field analysis(CoMFA), quantitative structure activity relationship(QSAR) studies and molecular dynamics(MD) simulations are applied in our research to gain a better understanding of the molecular interactions between the new fentanyl analogues(FA) and μ-opioid receptor(MOR), which provides a more rational design of targeting drugs. Secondly, chemical synthesis of novel compounds have been carried out successfully and their sturctures were confirmed by Nuclear Magnetic Resonance(NMR) and Mass Spectrom(MS). Lastly, in view of the functional roles of higher selectivity and affinity, the evaluation of the biological activities is ongoing.

Abstract: A gecko-inspired silicone rubber array was successfully fabricated by ICP etching strategy. Adhesion properties of this gecko-inspired structure were studied through two parallel and independent approaches: experiments and model simulations. In our former work, based on the JKR (Johnson-Kendall-Roberts) contact theory, we proposed a nonlinear mechanical model to formulate the adhesion between a fiber and substrate. Now SPM experimental results verify the maximum adhesion force; show that fiber structure has being relatively better adhesion than unstructured. Moreover, some experimental phenomena explained by our present model.

Abstract: This paper studied how to identify the cashmere and wool fibers by scale density. The scale density is extracted in frequency domain. The theory of extracting scale density and image preprocessing are given in this paper. The samples are 100 cashmere images and 100 wool images. The recognition rate is above 83% by SVM cross validation. The result reveals that scale density is a valid feature in identifying the cashmere and wool fiber.

Abstract: In this study, the chemical profiles of petroleum ether and butyl alcohol extracts of longan seeds were systematically characterized using gas chromatographic mass spec-trometry (GC–MS). 33 and 9 kinds of compounds were identified respectively.

Abstract: Microbial fuel cells with brush bio-anode and bio-cathode made of PAN-based carbon fibers were constructed, and the electricity production was investigated. Experimental results indicate that both the anode and the cathode could be catalyzed by mixed bacterial cultures. Oxygen-reduction at the cathode could be carried out effectively with the assistance of catalytic action by bacteria, enhancing the electrochemical properties of the cathode. Stable electricity production could be obtained with maximum power 5.6 mW (corresponding power density ~2.1 W/m³ MFC volume) when operating MFC in continuous flow mode. PAN-based carbon fibers were shown to be suitable electrode materials for MFCs, especially in systems for the future applications.

Abstract: The objective of this paper was to separate curcumine from Rhizoma curcuma longae and aqueous two-phase extraction technology was employed to perform the study. Four types of PEG (400, 600, 2000 and 4000) and three types of salt ((NH4)2SO4, KH2PO4 and K2HPO4) were tested to form the aqueous two-phase systems. The results showed that the ATPS composed of PEG 400 and (NH4)2SO4 were the best. And the partition coefficient of curcumine could reach 21.79 when the concentration of PEG 400 and (NH4)2SO4 was 14.6% and 26% respectively.

Abstract: Calcium-strontium hydroxyapatite [Ca_5-xSr_x(PO₄)₃OH, Ca-SrHA] were prepared by a novel coprecipitation process. The homogeneous aqueous solution of calcium nitrate, strontium nitrate and phosphoric acid was used as starting material, and ammonia was used as precipitator. A series of Ca-SrHA samples had been synthesized by adding ammonia into the precursor solution to pH10 and following aging at 60°C for 18h. The samples were characterized by X-ray diffraction, Fourier transformed infrared spectroscopy and scanning electron microscopy. The results show that so-prepared samples present essential characteristics of Ca-SrHA. All samples have a short rod-like morphology. The cell parameters of Ca_5-xSr_x(PO₄)₃OH are linear to the value of x, and the infrared absorption bands of PO₄^3- groups shift to lower wave numbers with the increase of x.

Abstract: The determination of aldehyde in genipin(GP) was carried out through solution silver mirror reaction and curpous oxide reaction. Influence of various dosage, pH, temperature and reaction time on shrinkage temperature of GP-crosslinked porcine acellular dermal matrix (GP-pADM) were investigated. The cytotoxicity and cell morphology of GP-pADM were observed. The results reveal that the existence of aldehyde is proved by silver mirror reaction and curpous oxide reaction. With increasing dosage of GP, shrinkage temperature of pADM increase. And with increasing pH, temperature and time, shrinkage temperature exhibit an early ascending trend and then decline slightly. Cytotoxicity of GP-pADM is 0 grade with great morphology, cell L929 could adhesive grow on the surface and in the pore of this material. The implications of all this are that GP is an ideal biological crosslinking agent for biomaterials.