Advanced Materials Research Vols. 236-238

Abstract: Nanotechnology has the potential to stimulate scientific innovation, promote traditional material industry chain to develop towards high-end direction and greatly benefit the society. In the process of value chain formation and operation, the value chain risks of high-end oriented nanomaterial industry associated with ecological and social environment, health, and safety issues cannot be ignored, however. Value chain formation and risks in high-end oriented nanomaterial industry are studied, and value chain risk management process for risk mitigation and loss prevention has also been put forward.

Abstract: Using maleic anhydride, benzyl alcohol and methanol as raw materials, a new preservative benzyl methyl fumarate containing α, β-unsaturated carbonyl structure was prepared. Based on the single factor experiment, the results of orthogonal test showed that the optimal conditions for the reaction was 4 h time, temperature at 65 °C, and with molar ratio of fumarate acid to methanol at 1:5. The production rate was 65.53%.

Abstract: The major protein fractions of peach kernel was extracted and isolated by Osborne’s method. The proteins were then characterised by gel electrophoresis, differential scanning calorimetry (DSC) and scanning electron microscopy(SEM) in order to elucidate its nature and structural properties. It was shown that albumins (85 g/100 g) and globulins(9 g/100 g) were the main components of the protein extract. Glutelins and prolamins are minor components (＜2 g/100 g). Sodium dodecylsul- phate polyacrylamide gel electrophoresis (SDS- PAGE) revealed a number of proteins with molecular masses ranging from approximately 20 to 63 kDa for peach kernel proteins; All the curves of DSC had two distinct endothermic peaks; One of The denaturation temperature (T_d1) for various peach kernel proteins was less than 60°C, and the other (T_d2) was more than 90°C. SEM showed that various proteins had some difference in microstructure .

Abstract: Graphitic carbon coated ZrC- and Co-nanoparticles were prepared by pulsed plasma in liquid (PPL); their structures were then investigated by high resolution transmission electron microscopy (HRTEM), X-ray powder diffraction (XRD) and Raman spectroscopy. In the process, metal electrodes were used as the metal source and liquid ethanol as the carbon source. The nanoparticles, with a small diameter size of 10 nm, have clear core/shell structures, indicating their potential for improving anti-oxidation properties and other applications.

Abstract: This paper studied the physical, chemical properties and structure of phellinus igniarius polysaccharides (PIPS). PIPS is negative on iodine potassium iodide solution test, positive on a-naphthol reaction, and negative on Fehling reagent test. Viscosity of exopolysaccharide (EPS) and intracellular polysaccharides (IPS) at 25 °C was 0.85 dL/g and 1.20 dL/g respectively. Column chromatography analysis separated 8 constituents from IPS, while 2 constituents were separated from EPS. The monosaccharide compositions of some of these constituents were further investigated. Results from gel permeation chromatography showed that IPS had 9 constituents and EPS had 4 constituents. The molecular weights of the constituents were determined.

Abstract: The adsorption kinetics of purple cabbage pigment (PCP) on LSA-21 macro porous adsorbent resin were studied at different adsorbent resin concentrations (1, 2, 4, 8 g adsorbent resin per liter of purple cabbage extraction solution) for the temperature range of 20~50°C. The results showed that the adsorption of PCP in purple cabbage extraction solution onto LSA-21 macro porous adsorbent resin is highly in agreement with both Langmuir and Freundlich models. Heat of adsorption (ΔH) value of 11.976 kJ/mol indicates the endothermic adsorption process. A decrease of Gibbs free energy (ΔG) with temperature increase also indicates the spontaneous nature of the process.

Abstract: This paper investigated the nanosilver detection method by ICP-MS and digestion method in complex matrix, such as in apple juice, grape juice and milk. The results showed that the silver calibration curves have excellent related coefficient with the range of 0.999906 to 0.999972, and the method detection limit of ICP-MS for silver was 1.1653ppb. The sample digestion method for apple juice, grape juice and milk were optimized at different temperature and contact time, in which the optimal digestion method for apple juice and grape juice was at temperature of 95 °C and contact time of 25min, but that for milk should be enhanced the temperature to 155 °C.

Abstract: The effects of Na₂SO₄ concentrations on the electrochemical deposited ZnO films have been investigated using scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), X-ray diffraction (XRD). The results show that Na₂SO₄ concentration plays a very important role in directing the growth of films from rod-like ZnO to plate-like zinc hydroxysulfate under fast hydroxylation. At a lower Na₂SO₄ concentration, the ZnO nanorods tend to be produced on the substrate. At a higher Na₂SO₄ concentration, zinc hydroxysulfate plates can be preferentially formed.

Abstract: Ultrafine CeO₂ nanoparticles were synthesized directly via solvothermal treatment of Ce(NO₃)₃·6H₂O powder in toluene at 180 °C for 48 h, and characterized by X-ray diffraction (XRD), Raman, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and UV-vis absorption spectrum. The results from XRD, Raman and XPS revealed the formation of pure cubic phase CeO₂ with some oxygen vacancies. The TEM image disclosed that the as-synthesized CeO₂ comprised nanoparticles of about 5–8 nm. The UV-vis absorption spectrum showed that the as-synthesized CeO₂ nanoparticles had a wide UV absorption band centered at around 326 nm (3.8 eV).

Abstract: In order to increase the magnetic fluids in target-based cancer treatment, the Cu²⁺ has been studied in this study. The Fe₃O₄ and Cu_0.1Fe_0.9O•Fe₂O₃ magnetic nanoparticles were prepared by ultrasonic emulsion method, and then disperse them into water with sodium dodecyl benzene sulfonate (SDBS) as surfactants to make magnetic fluids. The cubic inverse spinel structure of Fe₃O₄ and Cu_0.1Fe_0.9O•Fe₂O₃ nanoparticles were analyzed by X-ray diffraction technique (XRD).The saturation magnetization of Fe₃O₄ and Cu_0.1Fe_0.9O•Fe₂O₃ were 79.55 emu•g^-1 and 75.90 emu•g^-1 by vibrating sample magnetometer (VSM). The morphologies of nanoparticles were observed by transmission electron microscope (TEM). The particle size was uniform 10-20 nm, and their shape was approximately spherical. The Cu_0.1Fe_0.9O•Fe₂O₃ magnetic particle functional group and the surface of particle coated with SDBS have been detected by Fourier Transform Infrared Spectroscopy (FT-IR). The magnetic fluids with a high saturation magnetization and stability have been prepared successfully in this study.