Processing method for vacuum freeze drying of Hemerocallis fulva L.
A technology of vacuum freeze-drying and processing methods, which is applied in food preservation, fruit and vegetable preservation, and food science. It can solve the problems of yellowing and browning, yellow flowers cannot be stored for a long time, and achieve yellow-green color, crisp and tender taste, and product preservation. long term effect
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Embodiment 1
[0047] A processing method of vacuum freeze-dried yellow flowers, which comprises the following steps:
[0048] S1. Pre-freezing the pretreated yellow flowers at -40°C for more than 10 hours; the pretreatment includes the following sub-steps:
[0049]A1. Soak and sterilize fresh yellow flowers in 100-150 mg / L chlorine dioxide solution for 12 minutes;
[0050] A2. Wash the fresh yellow flowers after sterilization with clean water, and then kill them with steam at 95°C for 60 seconds, which can achieve the effect of sterilization and enzyme elimination;
[0051] A3. Immerse the finished yellow flower in cold water to cool, and then rinse it 2 to 3 times. At this time, the yellow flower has a yellow-green color and a crisp and tender texture. At the same time, the colchicine has been inactivated and dissolved, so it is safe to eat;
[0052] A4. Put the rinsed fresh yellow flowers into the dehydrator, vibrate and dehydrate, and then spread them evenly on the plate.
[0053] S2, ...
Embodiment 2
[0056] A processing method of vacuum freeze-dried yellow flowers, which comprises the following steps:
[0057] S1. Pre-freezing the pretreated yellow flowers at -40°C for more than 10 hours; the pretreatment includes the following sub-steps:
[0058] A1. Soak and sterilize fresh yellow flowers in 100-150 mg / L chlorine dioxide solution for 15 minutes;
[0059] A2. Wash the sterilized yellow flowers with clean water, and then steam them at 96°C for 30 seconds to achieve the effect of sterilization and enzyme inactivation;
[0060] A3. Immerse the finished yellow flower in cold water to cool, and then rinse it 2 to 3 times. At this time, the yellow flower has a yellow-green color and a crisp and tender texture. At the same time, the colchicine has been inactivated and dissolved, so it is safe to eat;
[0061] A4. Put the rinsed yellow flowers into the dehydrator, vibrate and dehydrate, and then spread them evenly on the plate.
[0062] S2, freeze-dry the yellow flower after pr...
Embodiment 3
[0065] A processing method of vacuum freeze-dried yellow flowers, which comprises the following steps:
[0066] S1. Pre-freezing the pretreated yellow flowers at -40°C for more than 10 hours; the pretreatment includes the following sub-steps:
[0067] A1. Soak and sterilize fresh yellow flowers in 100-150 mg / L chlorine dioxide solution for 18 minutes;
[0068] A2. Wash the fresh yellow flowers after sterilization with clean water, and then kill them with steam at 94°C for 90 seconds, which can achieve the effect of sterilization and enzyme elimination;
[0069] A3. Immerse the finished yellow flower in cold water to cool, and then rinse it 2 to 3 times. At this time, the yellow flower has a yellow-green color and a crisp and tender texture. At the same time, the colchicine has been inactivated and dissolved, so it is safe to eat;
[0070] A4. Put the rinsed yellow flowers into the dehydrator, vibrate and dehydrate, and then spread them evenly on the plate.
[0071] S2, freez...
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