Showing papers by "Ming-Jyi Jang published in 2013"
2 citations
TL;DR: In this article, a semi-empirical-quantum molecular dynamic simulations were performed to clarify hydrogen atom diffusion behavior in ZrNi alloys materials, and a theoretically prediction of dynamical diffusion coefficient was presented to compare diffusion kinetics of crystalline and amorphous structure.
15 Nov 2013
TL;DR: In this paper, the use of ultrasound to extract caffeine and flavor from coffee, the different operating conditions for extraction experiments are executed and the results are also compared, the results show that coffee flavor is not increased with temperature raised, because the volatile degree of flavor components are fast at high temperatures.
Abstract: Coffee is an extremely popular leisure drink throughout the world. Coffee has a very distinct aroma that is the result of a variety of constituents. These include proteins, tannic acid, fats and of course caffeine among others. A general survey of reference works indicates that ingesting a small amount of caffeine can be beneficial; it can stimulate the brain and enhance memory, but in excess, caffeine can exacerbate health issues such as heart problems, high blood pressure, kidney and coronary disease. In this research, our focus is the use of ultrasound to extract caffeine and flavor from coffee, the different operating conditions for extraction experiments are executed and the results are also compared. The results show that coffee flavor is not increased with temperature raised, because the volatile degree of flavor components are fast at high temperatures. And use of low vibration frequency was better than high vibration frequency.