頁籤選單縮合
題名 | 粒型農產品遲滯性快速量測法之研究 |
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作者 | 陳加忠; 曹之祖; 賴建洲; | 書刊名 | 農業工程學報 |
卷期 | 36:4 1990.12[民79.12] |
頁次 | 頁104-108 |
分類號 | 434.25 |
關鍵詞 | 遲滯性; 落花生; 平衡相對濕度; Hysteresis; Peanuts; Equilibrium relative humibity; |
語文 | 中文(Chinese) |
中文摘要 | 農產品平衡相對濕度平衡含水率和溫度的關係為農產品收穫後處理作業所必須具備之資料,農產品在相同相對濕度環境下去濕和吸濕過程之平衡含水率並不相同,此現象稱之遲滯性。去濕物性主要應用於乾燥作業,吸濕物性則應用於倉貯作業。在食品工程界亦發現遭滯性對食品之化學反應能力有顯著之影響。 以”ERH依直接測定法”加以推廣使用,可以同時量劃農產品在相同相對濕度時其不同的吸濕和去濕含水率。此方法係將極高含水率和極低含水率的樣品依不同比例加以混合於密閉器內,待其到蒸氣壓平衡狀態時,以電子相對濕度計量取其平衡相對濕度。再分別量測其去濕和吸濕平衡含水率。由落花生遭滯性的試驗結果已證實此法的可行性。 |
英文摘要 | Data relating equilibrium relative humidity (ERH), equilibrium moisture content (ECM), and temperature are necessary to design postharvest systems for agricultural products. The equilibrium moisture content for the adsorption and desorption process did not have the same values. The difference is called the hysteresis effect. Desorption property was mainly used in drying process. Adsorption property was applied in soaring work. The hysteresis had the significant effect on the chemical reaction of foodstuffs. With the extension of “ERH step-by-step direct measurement method”, the adsorption and desorption moisture content of the agricultural products at the same equilibrium relative humidity can be measured simultaneously. In this technique, the samples with relative high moisture content and pretty low moisture content are mixed with different ratio within the isolated containers. The equilibrium relative humidity is measured by electronic RH sensors after the closed system within the sample container reached final equilibrate state of vapor pressure then the absorption and desorption moisture content of sample are determined. The available of this technique is proved by the experimental results of peanut pods. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。