Development of processing technology for edible mature silkworm

Abstract

To increase the income of sericultural farms and expand sericulture industry, new high value-added products of sericulture which are beyond current products like 5th instar 3 day dried silkworm, male pupa and silkworm dongchunghacho are needed. For this sericulture product diversification, it is in desperate need of the edible processing method after 5th instar 4 day silkworm that silkgland formation is rapidly in progress during the larva periods. So far it was hard to eat because of silkgland formation in their body. So we try to boil and steam frozen-, dried-, and livingsilkworm to develop low-cost edible processing methods for farmers. As the result, the silkgland of frozen and dried silkworm was not degenerated, so silkgland in their body was not edible. But in the case of living silkworm, the silkgland of mature silkworm was degenerated by boil and steam treatment, so the body and silkgland of silkworm were not only edible but also tasted good. Then the dried silkworm was easily powdered and there was no problem when it was eaten. This source technology can be widely used in the general food industry, health functional food cosmetics, pet food and so on, so it is predictable that this will contribute to increase the income of sericulture farms and expand sericultural industry.

Hepatoprotective Effects of Steamed and Freeze-Dried Mature Silkworm Larval Powder against Ethanol-Induced Fatty Liver Disease in Rats

“…In addition, the silkworm has recently received scientific attention and several studies have reported its health advantages against liver injury [16], Parkinson's disease [17], and diabetic hyperglycemia [18]. However, after the third day of the fifth instar, the protein composition of silkworm glands rapidly increases, hence, there is a problem insofar as the biological activity is lowered [19]. In addition, dried or refrigerated silkworms are difficult to consume as food because the silk protein is denatured to a high strength [19].…”

“…However, after the third day of the fifth instar, the protein composition of silkworm glands rapidly increases, hence, there is a problem insofar as the biological activity is lowered [19]. In addition, dried or refrigerated silkworms are difficult to consume as food because the silk protein is denatured to a high strength [19]. Therefore, Ji et al have developed a new method of processing silkworms into an easy-to-eat form, in which the mature silkworms are steamed for 130 min at 100 • C before lyophilizing and grinding [19].…”

“…In addition, dried or refrigerated silkworms are difficult to consume as food because the silk protein is denatured to a high strength [19]. Therefore, Ji et al have developed a new method of processing silkworms into an easy-to-eat form, in which the mature silkworms are steamed for 130 min at 100 • C before lyophilizing and grinding [19]. We previously reported that steamed and freeze-dried mature silkworm larval powder (SMSP, 0.1, 1, and 10 g/kg) alleviated fatty liver disease in rats treated with alcohol [20].…”

Nutrition composition differences among steamed and freeze-dried mature silkworm larval powders made from 3 Bombyx mori varieties weaving different colored cocoons

“…Briefly, after steamed at 100°C for 130 min using an electric pressure-free cooking machine (Kum Seong Ltd., Boocheon, Korea), mature silkworm larvae were freeze-dried with a freeze-drier (FDT-8612, Operon Ltd. Kimpo, Korea) at -50°C for 24 h. The freeze-dried silkworm larvae were pulverized twice using a hammer mill (HM001, Korean Pulverizing Machinery Co. LTD., Incheon, Korea) and a disk mill (Disk Mill01, Korean Pulverizing Machinery Co. LTD) sequentially (Ji et al, 2015).…”

Organoleptic Evaluation of the High-Protein Yoghurt containing the Edible Insect Oxya chinensis sinuosa (Grasshopper): A Preliminary Study

“…A among the representative edible insects in South Korea, Oxya chinensis sinuosa (Grasshopper) was also included (Ji et al, 2015). The protein concentration of Oxya chinensis sinuosa (Grasshopper) was about 742.8 g/kg dry weight, and it meant that edible insects were the valuable resource of dietary protein or of protein supplement (Kim et al, 2017).…”