Advanced Materials Research Vols. 690-693

Abstract: The changes in emulsifying and foaming properties of wheat gluten treated by dynamic high pressure microfluidization (DHPM) were identified. Solutions of wheat gluten (4%, w/w) in water or in pH=2 aqueous solution were treated by various pressure (0, 40, 60, 80, 100 MPa) microfluidization. It was found that DHPM treatment could effectively improve the emulsifying property and foam stability of wheat gluten in water, but decrease the foaming capacity of wheat gluten in water and emulsifying and foaming properties of wheat gluten in pH=2 aqueous solution. These results may be useful to the food processing industry.

Abstract: The paper presents the characteristics of fire-wood, the combustion process and the degradation of wood and also conducts an assessment non-retarded and retarded beech veneer testing reaction to fire according to EN ISO 11925-2 and its methodology. The main contribution is to highlight the importance of fire retardants in view of the fire properties of materials

Abstract: In this paper, high-speed counter-current chromatography (HSCCC) was established and successfully applied for the separation and purification of trans-resveratrol from Rhizma Polygoni Cuspidati. After extracted by microwave assisted extraction (MAE), the dry extract was directly dissolved in HSCCC solvent and introduced to HSCCC separation system. Two-phase solvent system of HSCCC was optimized. Trans-resveratrol was separated from extract of Rhizma Polygoni Cuspidati by high-speed counter-current chromatography in two-step using two different solvent systems composed of chloroform-methanol-water (4:3:2, v/v/v) and n-hexane-ethyl acetate-methanol-water (3:5:4:6, v/v/v/v). From 200 mg of crude extract, 2.5 mg of trans-resveratrol was obtained at over 99% purity by HPLC analyses, and its chemical structure was identified by ESI-MS, ¹H NMR.

Abstract: The oxidative self-heating process of vegetable oil with high content of unsaturated fatty acids was investigated by the means of sequential scanning calorimetry in safety calorimeter SEDEX. The oil was applied on the cotton, and was put to the standard pressure sample vessel, which was modified for air inlet. The behavior of sample was studied under three rates of air flow. First experiment was carried out in the temperature range between approximately 30 and 350°C at a heating rate of 45°C/h. Second scanning was carried out in the temperature range from 30 to 200°C at heating rate of 10°C/h.

Abstract: Four preponderant yeast strains (GJ01, GJ02, GJ03 and GJ04) were isolated from the spontaneous fermentation pear wine as source of yeast for wine making from pear. Ethanol yield of GJ03 was the highest and its using rapidity of the sugar was the most quickly. GJ03 was identified as Saccharomyces cerevisiae and named Saccharomyces cerevisiae GJ03. The orange wine fermented associated by Saccharomyces cerevisiae GJ03 was the best in quality by sensory evaluation among all orange wines whose ethanol concentration was 9.06% (v/v).

Abstract: In this paper, mechanisms and defiberation point of Dendrocalamus Giganteus Munro kraft pulping were studied. The results showed that the delignification of kraft cooking could be divided into 3 stages: the bulk delignification stage, which was from the beginning of heating to 165°C for 30min, and its delignification rate was above 80%; the supplementary deligninfication stage, which was from 165°C for 30min to 90min, and about 11% of lignin was dissolved in this stage; the residual delignification stage, which was from 165°C for 90min to the end of cooking, and about 1% of lignin was dissolved in this stage. And the defiberation point during kraft cooking was at 165°C for 60min nearby.

Abstract: As textile industrial and glass paper-making materials, dissolving pulps are scarce in China and a great deal of dissolving pulps are imported in the recent years. Currently different fiber materials are tried to produce dissolving pulp in China. In this research work the hydrolysis parameters of the fast-growing poplar based dissolving pulp producing were investigated .And the chemical composition of pulp after hydrolysis were also analyzed, the experimental results showed that the optimal hydrolysis conditions were acid dosage in the range from 0.015% to 0.035%, wood-to-liquor ratio 1:6.5, and the temperature 130 °C. The pentosan content of the pulp after hydrolysis in this hydrolysis conditions was in range of 0.62%-23.16%, which decreased by 23.01%. And the cellulose content slightly changed.

Abstract: in order that Gambiered Guangdong Silk can be made in normal area with modern technology, the ultraviolet radiation light was instead of sunlight, normal mud/Fe²⁺ was instead of Pearl River mud. The Gambiered Guangdong Silk was prepared by ultraviolet radiation light and normal mud/Fe²⁺. The result showed that ultraviolet radiation light and normal mud/Fe²⁺ could produce Gambiered Guangdong Silk. The color of silk fabric made by ultraviolet radiation light and normal mud/Fe²⁺ was almost same as that of silk fabric made by sunlight and Pearl River mud. The thickness of silk fabric made by ultraviolet radiation light and normal mud/Fe²⁺was approximate to that of ilk fabric made by sunlight and Pearl River mud. These means the Gambiered Guangdong Silk can be made in normal area.

Abstract: A thermostable lactase from Bacillus coagulans T242 was subjected to purification on DEAE chromatography followed by gel permeation chromatography, then the homogenous Bacillus coagulans T242-lactase was obtained, and its molecular mass was 55.0 kDa as shown in SDS-PAGE. Analysis indicated its optimum condition was 60 C and pH 6.8 and it was stable at 40~60 C and pH6.5~7.8; Mn²⁺, Mg²⁺ and Na⁺ at high concentration all had marked activation on lactase activity. Kinetic constants determination revealed Bacillus coagulans T242-lactase had a strong affinity for lactose.

Abstract: The antioxidant enzymatic activities of Torreya grandis alcohol extracts (TAE) in cholesterol-fed rats and an index of lipid peroxidation had been identified In the TAE groups, compared with the control group, significant decreases were observed in superoxide dismutase (SOD) activity in the livers and kidneys, catalase (CAT) activity in the kidneys, and glutathione peroxidase (GSH-Px) activity in the liver and kidneys. Besides, significant decreases were observed in the quantities of thiobarbituric acid reactive substances (TBARS) in the liver and kidneys of the TAE groups.