Papers by Keyword: Solubility

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Authors: Renate Gildenhaar, Georg Berger, E. Lehmann, Michael Stiller, Ch. Koch, Paul Ducheyne, A. Rack, H. Seligmann, S. Jonscher, Christine Knabe
Authors: Xiang Wang Cui, Lin Zhang
Abstract: The amorphous state of poly (Narylenebenzimidazole ketone)(PNABIK) were determined using the Amorphous Cell Module of the Materials Studio program. The solubility improvement of PNABIK compared with traditional ploybenzimidazole (PBI) was also simulated by cohesive energy density (CED) calculating. PNABIK was synthesized by N-C coupling reaction to validate the rationality of simulation results and all the simulation results were consistent with the experimental tests.
Authors: Zhao Hui Pi, Guang Qiang Li, Yan Ping Xiao, Zhan Zhang, Zhuo Zhao, Yong Xiang Yang
Abstract: An experimental investigation on the solubility of Zr in Cu-Sn alloy was conducted in a resistance furnace. The solubility of Zr in Cu-Sn alloy was determined by investigating the influence of different conditions such as the ratio of Cu-Sn alloy and temperature. The solubility of Zr in Cu-Sn alloy changes with the proportion of Cu and Sn, and it increases with the increasing of Cu content. The experimental temperature has a significant effect on the solubility of Zr in Cu-Sn alloy. The maximum solubility of Zr in Cu-Sn alloy is 6.2 mass % at 900 °C with the mass ratio of Cu : Sn = 8:2.
Authors: Yu Long Wang, Huai Yu Zhan, Yan Xin Liu, Fei Fei Liu
Abstract: Calcium sulphate is rich in natural resources and by-product of many industrial processes. However, most calcium sulphate product was only used with low added value or treated as waste, harmful to environment. If the calcium sulphate can be used as papermaking filler, very high added value can be gained and also the environment problem can be solved. In this paper calcium sulphate from by product of industry was characterized by X-ray diffractometer (XRD) and scanning electron micrograph (SEM), and then used as papermaking filler. The influence of calcium sulphate filler on pulp suspension and paper properties was studies. The results showed that the calcium sulphate fillers were composed of three crystal forms, dihydrate, hemihydrate, anhydrite, and it was needle or fiber shape, hollow in the middle; calcium sulphate showed high brightness and high conductivity in water, compared with talc or ground calcium carbonate(GCC) filler. When calcium sulphate filler was used in papermaking process the filler retention was very small because of its high solubility in water. Calcination at high temperature can lower the solubility of calcium sulphate and slightly increase the retention, but the retention was still quite small. The future work should focus on controlling the solubility of calcium sulphate.
Authors: H. Bedboudi, A. Bourbia, M. Draissia, S. Boulkhessaim, M.Y. Debili
Abstract: Rapidly solidified Al-Zn alloys with Zn contents ranging up to 50 wt.% were made under vacuum, by high-frequency (HF) induction melting, from compacted mixture targets of Al and Zn of fine (99.99 % purity) elemental powders. The microstructural characteristics and strengthening mechanisms were investigated. The crystallographic microstructures were characterized by means of X-ray diffraction (XRD) analyses and optical microscopy observations as well as Vickers microhardness testing. Detailed overviews of alloying solubility of zinc in aluminium were given. Extensive solid solutions of CFC Al were found in the (HF) Al-Zn alloys, and a higher Vickers microhardnesses compared to that of pure (HF) aluminium.
Authors: Wen Su Ji, Yu Kui Ding, Yu Qiu Xu
Abstract: The solubility of TNT and RDX was measured in supercritical carbon dioxide fluid at 303.0, 308.0, 323.0, 338.0 K, and over the pressure range from 10.0 MPa to 50.0 MPa. This study examined the influences of extraction temperature, extraction pressure and support effect (SE) between molecules of TNT and RDX on their solubility in the TNT/RDX/SC-CO2 system. The results show that solubility of TNT and RDX in TNT/RDX/SC-CO2 ternary system is much higher than that in binary system. The values of SE of RDX and TNT increase first and decrease then with the pressure changing. The pressure turning point occurred over the pressure range from 25 MPa to 28 MPa for TNT and from 13 MPa to 20 MPa for RDX.
Authors: Zdzisław Wiśniowski, Mateusz Banach, Irena Roterman
Abstract: The possible mechanism protecting the organisms against the freezing is shown. The presence of highly soluble proteins with no specific interaction allows the organism surviving the temperature below zero Celsius degree. The role of hydrophobic core and its structure (recognized as accordant with the idealized one) appears to be critical for antifreeze function of protein. The possible application of the model for biotechnological preparation of compounds protecting the solutions against freezing is discussed.
Authors: Guo Ming Zeng, Yuan Liang Wang, Xin Qiang Ning, Mao Lan Zhang
Abstract: Corn stover is a largely feasible and cheap renewable resource with low commercial value. An attractive alternative is utilization of corn stover for chemical industry,medicine,biochemistry etc. However, the production costs are still too high to apply on commercialization. The purpose of this study was to use the response surface methodology (RSM) to optimize of cellulose salvation by ZnCl2 after the steam explosion .The solution of cellulose that had been pretreated with 87% ZnCl2 at 139 °C for 49 min resulted in an optimum solubility of 76.2%.
Authors: Chun Yan Ding, Lan Wang, Jun Xiong Lin, Duan Ni
Abstract: In order to resolve the problem of water pollution owing to using a large number of urea in silk printing with reactive dyes, TEG (Triethylene glycol/3, 6-dioxaoctane-1/8-diol) was used to replace the urea. The effects of TEG on the performance of monochromic and combination printed fabrics were studied through testing K/S values (color depth) and Delta E (color differences) of printed fabrics. Meanwhile, the effect of TEG and urea on the solubility of reactive dye and the moisture absorbency of silk fabric were compared by testing the solubility of reactive dyes and the diameter of silk fiber respectively. The results indicated that the best replacement ratio of TEG to urea was 75%.
Authors: Jian Xin Chen, Xu Na Shi, Shu Chun Pang, Mei Jing Zhang, Sheng Yu Li
Abstract: Wavelet neural network(WNN) was applied to predicate the cortisol solubility. The model consists of a multilayer feedforward hierarchical structure, and the flow of information is directed from the input to the output layer by using wavelet transforms to achieve faster convergence. By adaptively adjusting the number of training data involved during training, an adaptive robust learning algorithm is derived for improvement of the efficiency of the network. The neural network was trained and simulated cortisol solubility with different input and output parameters. Simulation results confirmed that this approach gave more accurate predictions solubility.
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