device to vary the amount of caffeine in coffee espresso.VERGOLI FRANCO
device to vary the amount of caffeine in coffee espresso.VERGOLI FRANCO
Connie Chen
of coffee purchased in six franchise coffee shops in Warsaw were analysed. A total of 120 coffee samples were tested. A significant positive (r = 0.7407,p< 0.001) correlation was found between the total polyphenol and caffeine content in all coffee types tested. Per unit volume, espresso ...