Advanced Materials Research Vols. 641-642

Abstract: The separation and purification of total flavonoids from Buddleja officinalis were carried out by AB-8 macroporous adsorption resin. The optimum adsorption conditions for sample flow rate, pH value and feeding concentration were 2.0 mL/min, 4.5 and 1.6 mg/mL, respectively, and the optimum desorption conditions were obtained by using 2.0 BV of 70% ethanol as desorption solvent at a flow rate of 1.0 mL/min. Under these conditions, the flavonoids content of the final product was 90.43%, increased by 1.7 times than unpurified sample (53.09%).

Abstract: The fermentative production of carotenoid by Rhodotorula sp.D with the utilization of corn steep liquor were investigated at laboratory scale and then performed for industrial trial. The optimal inputs of waste syrup (glucose) and corn steep liquor of 7% and 33.3% were determined by single factor tests, with the highest carotenoid yeild of 11.7 mg/L and content of 383.6 μg/g (carotenoid/biomass) for 5L fermentation. The same conditions were then carried out in a 1000L fermentor for industrial trial. After 41 h fermentation, there were 31% of crude protein and 180.4 μg/g of carotenoid in the final spray dried products. These results show that as a non-expensive bioresource, corn steep liquor can be utilized for fermentative production of carotenoid, which will increase its potential as functional feed in industrial usage.

Abstract: The decay kinetic models of delayed luminescence of beans have been examined, the effect of the shape of bean samples on the properties of delayed luminescence has been investigated. It is showed the delayed luminescence of beans mainly comes from the surface of beans and can’t reflect the whole information of beans. After beans being crushed, the component of beans can be mixed together. When luminescence, the components of beans powders are all irradiated, which can reflect the whole information of beans. The fitting degree of hyperbolic function is best.

Abstract: his work presents a new cost-effective filler for polypropylene (PP) by the use of oyster-shell waste. Characteristics of oyster shell particle prepared by supersonic jet mill were investigated. Microstructure analyses demonstrated that the average particle size of as-recived oyster shell particle was mainly around 3um, and the particles were non-uniform in size and irregular in shape. To improve both the mechanical of oyster shell /polypropylene (PP) composites, oyster shell was modified by using titanate coupling agent to form polymerizable particle. While the modified oyster shell and raw oyster shell were introduced into the PP matrix, it could be concluded that modified oyster shell /PP composites have better mechanical than raw oyster shell /PP composites and neat PP.

Abstract: A novel microspheres adsorbent was prepared by the emulsion-congealed crosslinking method. The gelatin was as raw material and glutaraldehyde was as the crosslinking agent. The SEM images showed that the product was spherical, the distribution was uniform and not sticky. The TG result showed that the thermal decomposition form of gelatin microspheres was single and the thermostability was good. The XRD results indicated that the crystalline state of gelatin had not been affected by crosslinking of glutaraldehyde. The adsorption performance of gelatin microspheres to Cr(Ⅵ) was studied by the static adsorption experiments. The application conditions were optimized by single-factor experiment. The results showed that the optimum conditions were that pH was 3.0, temperature was 35°C and time was 1.5h.

Abstract: Bisphenol a (BPA), is a chemical that has been used for more than 40 years in the manufacture of many hard plastic food containers such as baby bottles and reusable cups and the lining of metal food and beverage cans, including canned liquid infant formula. Therefore, it is very necessary to study its health risk and ecological risk. In this paper, four typical estrogen acceptor genes (AHR1, ESR1, VTG1 and VTG3) in female zebrafish liver were studied to assess the low dose and chronic effects of bisphenol A (BPA), with the method of quantitative real-time RT-PCR, and the ability of self regulation and repair of these genes were also discussed. The results showed that these genes could be induced even at 15 ug/L BPA, and VTG 3 was the most sensitive gene. VTG 3 and VTG 1 had obvious self repair and adjustment ability when BPA risk was removed. No monotonic dose-effect relationships of BPA were also found at this study.