In order to elucidate the above point, UV spectrophotometric measurement was carried out 1 mm below the oil-water interface (Figure ) at a rate of 1 acquisition/second. These data summarized in Figure show that the fluctuation of UV absorbance, which starts almost immediately in some cases as the data acquisition begins, whereas in some other cases, the fluctuation begins after a certain lag time. Note that such lag time was evident in the concentration evolutions as shown in Figure . Furthermore, the intermittency occurs at fast pace in some cases whereas they sparsely in other cases. For pure liquids, such as alkanes, no such fluctuation of concentration could be observed when surfactant concentration was 100 ppm. However, with the exactly same system, significant fluctuations were observed when the concentration of surfactant increased to about 500 ppm. The power spectral densities of the time series of the concentration fluctuation generally exhibit bluish noise, with the probability distribution function of the fluctuation exhibiting a non-Gaussian behavior. We surmise that they are all related to the burst events resulting from the explosive formation of emulsions as observed in the DPD-MD simulations.