*3.10. DSC*

Figure 6 is the DSC result of the lyophilized royal jelly without trehalose and with 0.5% trehalose. The thermal stability of the samples could be evaluated by the peak temperature and enthalpy change parameters in the DSC curve. The better thermal stability of the sample could be represented by the higher peak temperature and larger enthalpy change. In Figure 6, the first endothermic peak at ~56 ◦C may be related to the water released. The second endothermic peak at 145 and 162 ◦C were related to the melting of crystals in the control group and TR 5 group, respectively. It was proven that the lyophilized royal jelly powder with trehalose had better stability than the control sample. In addition, the glass transition was observed in the TR 5 group at around 65 ◦C because of the addition of the trehalose.
