- Publicationการพัฒนาฐานระบบข้อมูลต้นแบบของกองส่งเสริมงานวิจัย มหาวิทยาลัยหอการค้าไทย
- PublicationQuality of reducedfat chiffon cakes prepared with erythritolsucralose as replacement for sugar(Scopus, 2009)
; ;School of Science and TechnologyUniversity of the Thai Chamber of Commerce. Research Support OfficeQuality characteristics of reducedfat chiffon cakes containing 0, 25, 50, 75 and 100% erytthritolsucraloseas sugar replacement were carried out. Specific volume decreased (p<0.05) with increased sugar replacement, but weight loss and water activity increased (p<0.05). The 100% erytthritolsucralose cake produced darker colour crumb, more cohesive and adhesive and less springy in relation to those of the control cake. Results from sensory evaluation also showed significant differences in all attributes for any cakes. The cakes with higher levels of erytthritolsucralose content became darker crumb, more moist and less tender and sweet than those with sugar. Total caloric value reduction in 50% erytthritolsucralose cake was about 21.3% in relation to 100 g of the standard cake. 10 57
- PublicationAntioxidant and tyrosinase inhibitory activity of mango seed kernel by productThe antioxidant and tyrosinase inhibitory properties of extracts of mango seed kernel (Mangifera indica L.), which is normally discarded when the fruit is processed, were studied. Extracts contained phenolic components by a high antioxidant activity, which was assessed in homogeneous solution by the 2,2diphenyl1picrylhydrazylradical and 2,2′azinobis (3ethylbenzothialozinesulfonicacid) radical cationscavenging assays and in an emulsion with the ferric thiocyanate test. The extracts also possessed tyrosinase inhibitory activity. Drying conditions and extraction solvent were varied, and optimum conditions for preparation of mango seed kernel extract were found to be sundrying with ethanol extraction at room temperature. Refluxing in acidified ethanol gave an increase in yield and the obtained extract had the highest content of total phenolics, and also was the most effective antioxidant with the highest radicalscavenging,metalchelating and tyrosinaseinhibitory activity. The extracts did not cause acute irritation of rabbit skins. Our study for the first time reveals the high total phenol content, radicalscavenging,metalchelating and tyrosinase inhibitory activities of the extract from mango seed kernel. This extract may be suitable for use in food, cosmetic, nutraceutical and pharmaceutical applications.
- PublicationSurface cleaning of metal wire by atmospheric pressure plasmaIn this study, the possible application of atmospheric pressure dielectric barrier discharge plasma for the annealing of metallic wire is examined and presented. The main purpose of the current study is to examine the surface cleaning effect for a cylindrical object by atmospheric pressure plasma. The experimental setup consists of a gas tank, plasma reactor, and power supply with control panel. The gas assists in the generation of plasma. Copper wire was used as an experimental cylindrical object. This copper wire was irradiated with the plasma, and the cleaning effect was confirmed. The result showed that it is possible to remove the tarnish which exists on the copper wire surface. The experiment reveals that atmospheric pressure plasma is usablefor the surface cleaning of metal wire. However, it is necessary to examine the method for preventing oxidization of the copper wire.
- PublicationBiosorption of copper by spent yeast immobilized in sodium alginate beadsSpent yeast from the brewing industry was immobilized with sodium alginate and used in a study on biosorption of Cu(II). Kinetic models were developed using pseudofirst and second order equations and tested for the sorption of Cu(II). The results showed that the sorption of Cu(II) onto immobilized spent yeast in sodium alginate beads could be described by a pseudosecond order model, which had high correlation coefficients (r2). The rate constant (k2) and the initial sorption rate (h) were calculated. The values of the rate constants were found to decrease from 0.208 to 0.037 g/mg min with an increase in the initial concentration of Cu(II) from 20 to 80 ppm. The initial sorption rate increased from 0.014 to 0.037 mg/g min as the initial concentration of Cu(II) was varied from 20 to 80 ppm. The observed dependence of the sorption rate on the initial concentration of Cu(II) indicated that the removal of Cu(II) was more rapid when the initial concentration of the solution was high.