In order to broaden the usability of the two‐spotted cricket (Gryllus bimaculatus De Geer) as a food ingredient, we investigated the effects of freeze‐drying and hot air‐drying, as well as the effects of storage at various temperatures (4–40°C), on the quality of cricket powder during short‐term storage. We found that the water absorption index values of freeze‐dried and hot air‐dried powder were 3.6 and 3.0 g/g, respectively, while the pH and color values of the powders were similar for the two drying methods. During storage at various temperatures over 14 days, water absorption and pH remained similar regardless of the drying method and storage temperature. However, freeze‐dried powder showed more color change compared to air‐dried powder according to their chroma values. In total bacteria and Escherichia coli detection tests, Escherichia coli was not detected under all storage conditions, whereas total bacteria were observed (~4 Log CFU/g) only in freeze‐dried powder stored for 14 days at 40°C. Therefore, our results suggest that the quality characteristics of two‐spotted cricket powder can be affected by the drying method applied, but these powders can be maintained for 14 days, largely without changes, at storage temperatures up to 40°C.

中文翻译：

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二斑蟋蟀(Gryllus bimaculatus De Geer)粉末干燥方式和储存温度的储存特性

为了扩大双斑蟋蟀（Gryllus bimaculatus De Geer）作为食品成分的可用性，我们研究了冷冻干燥和热风干燥的效果，以及在不同温度下储存的效果（4- 40°C），对短期储存期间蟋蟀粉的质量。我们发现冷冻干燥和热风干燥粉末的吸水指数值分别为 3.6 和 3.0 g/g，而两种干燥方法的粉末的 pH 值和颜色值相似。在不同温度下储存超过 14 天期间，无论干燥方法和储存温度如何，吸水率和 pH 值都保持相似。然而，根据其色度值，冻干粉与风干粉相比显示出更多的颜色变化。在总细菌和大肠杆菌检测试验中，在所有储存条件下均未检测到大肠杆菌，而仅在 40°C 下储存 14 天的冻干粉末中观察到总细菌数（~4 Log CFU/g）。因此，我们的结果表明，双斑蟋蟀粉的质量特性会受到所采用的干燥方法的影响，但这些粉末可以在高达 40°C 的储存温度下保持 14 天，基本上没有变化。