RESUMO
External Particle Induced X-ray Emission technique was employed in the study of submerged fermentation of ethanol from Jaggery using Saccharomyces cerevisiae as the organism. Effect of KNO3 as a nitrogen source was studied and the uptake of the supplement was monitored. A Proton beam of 3MeV from the 3MV Tandom type pelletron accelerator was used for the multi-elemental analysis. Apart from K, other elements like Cr, Fe, Cu and Zn were identified. The sensitivity of the technique was also determined by varying the sample size between 2mm and 10mm.
RESUMO
The elemental profiles of the dental caries in human teeth were analyzed by the external proton induced X-ray emission (External PIXE) studies. A total of ten elements including trace namely P, Ca, V, Mn, Fe, Cu, Zn, As, Sr and Pb were estimated in the present study. P and Ca were found to be the major elements whereas all other elements were in trace level. It was observed that the concentration of elements Phosphorus and Calcium varied between the range 7.98% and 19.26% and 19.83% and 35.2% respectively in dental caries.
RESUMO
The production of ethyl alcohol using Saccharomyces cerevisiae NCIM 3288 was found significant when jaggery is used as the carbon source. From the various physical parameters studied, the effect substrate concentration was found to play a key role, and the other two important chemical supplements tested, i.e., Nitrogen and phosphorus sources were also found to be significantly contributing to product concentration. A response surface analysis predicted a substrate concentration of 23.56 % (w/v), (NH4)2SO4- 2.612 g/l and KH2PO4- 3.407g/l as the optimal conditions keeping the rest of the rest of the physical parameters at their optimal conditions as obtained from the preliminary studies. A maximum ethanol concentration of 6.15%(w/v) was obtained at the end of third day of fermentation.