As an approach for estimation of the droplet size in the molten salt-liquid metal extraction process, a droplet formation experiment at room temperature was conducted to evaluate the applicability of the Scheele-Meister model with water-mercury system as a surrogate that is similar to the molten salt-liquid metal system. In the experiment, droplets were formed through the nozzle and the droplet size was measured using a digital camera and image analysis software. As nozzles, commercially available needles with inner diameters (ID) of 0.018 cm and 0.025 cm and self-fabricated nozzles with 3-holes (ID: 0.0135 cm), 4-holes (ID: 0.0135 cm), and 2-holes (ID: 0.0148 cm) were used. The mercury penetration lengths in the nozzles were 1.3 cm for the needles and 0.5 cm for the self-fabricated nozzles. The droplets formed from each nozzle maintained stable spherical shape up to 20 cm below the nozzle. The droplet size measurements were within a 10% error range when compared to the Scheele-Meister model estimates. The experimental results show th

Currently, the storage temperature of the production factory of medicinal herbs (hGMP) is about 5~ 12℃. This temperature is possible to suppress pest but can not kill the pests. For this reason, we need to lower the temperature during lethal time because the pest has often occurred inside the packaging of medicinal herbs in the distribution process in summer. In order to solve this problem, we have investigated the lethal time of the storage insect(Tribolium castaneum Herbst) After we froze medicinal herbs(Cnidium officinale Makino and Angelica gigas N. ) at approx. –70℃ and –15℃ respectively. We then investigated the change of bioactive components and exterior characteristics of medicinal herbs in order to determine whether there is a change of quality. The results were as follows. The lethal time of Tribolium castaneum Herbst is about 2 minutes if processed at approx. –70℃, while the other time is about 16 minutes at approx. –15℃. We investigated the change of quality after the treatment of the two medicinal herbs in the similar way but could not confirm the difference of color and brightness and the bioactive components on statistics. Through this research, it has been verified that the process of quick freezing for pest control can not affect the main quality of the medicinal herbs. Therefore this technology can be introduced in the manufacturing process of medicinal herbs through additional research.

We divided the sample into four groups by temperature regimes and comparing the Lethal effect after exposure to high room temperatures for 50~58 days. After inoculating Cnidium officinale Makino with Tribolium castaneum Herbst, the storage insects of medicinal herbs, was 20 respectively. The results of treating cut Cninium officinale Makino are listed below. Survival rate of group A by exposure of 5 times at 35~36.5℃ is less than 7.5%. Survival rate of group C by exposure of 5 times at 35.5~39.5℃ and group D by exposure of 23day at 37~44℃ is less than 2.5%. Especially in the case of group D, we found that complete eradication of the insect is difficult despite exposure high temperature for a long time. Also most of the grinded Cninium officinale Makino has the same patten but group B by relatively treated low temperature has a significant difference in mortality. Insect mortality in cut Cninium officinale Makino by exposure at 35℃ and 39.5℃ is 7.5% and the insect mortality in grinded Cninium officinale Makino by exposure at 39. 5℃ is only 75%. The reason is estimated that heat conduction of grinded Cninium officinale Makino is slow and it was less shocked by heat because The final core temperature of medicinal herbs is relatively low about 0.5~2℃. This means that storage insect(Tribolium castaneum Herbst) can be suppressed at mid-high temperature if it is to be treated more than 50 days without problem of quality deterioration of medicinal herbs that can be caused by high temperature.