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頁籤選單縮合
題 名 | 磷化氫在穀物中之水平方向擴散=Horizontal Diffusion of Phosphine through Grain |
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作 者 | 彭武康; 楊金江; 李騰貴; | 書刊名 | 中華昆蟲 |
卷 期 | 19:2 1999.06[民88.06] |
頁 次 | 頁201-207 |
分類號 | 433.85 |
關鍵詞 | 磷化氫; 擴散; 玉米; 高粱; 稻穀; Phosphine; Diffusion; Corn; Sorghum; Paddy rice; |
語 文 | 中文(Chinese) |
中文摘要 | 利用長方形馬口鐵皮箱,截面30X30 cm,長150 cm,隔成3段,中央部分(C)長90 cm 裝滿穀物,偵測磷化氫之水平方向擴散速率。磷化鋁施於一端(B),產生之磷化氫氣體,經 玉米、高梁或稻穀之穀粒間隙,橫向擴散至另一端(D)。每24小時,以Auger gas detecting tube偵測DB兩端之濃度,分別為3250及400,3600及500,3700及520 ppm;無穀之對照組為 1200及1100 ppm。兩端磷化氫濃度比分別為1:0.12、1:0.14、1:014及1:0.92。磷化氫經 144小時擴散,在玉米及稻米,兩端已達平衡,濃度為分別410及500 ppm;對照組在48小時 平衡,濃度1100 ppm。由於磷化氫被氧化分解及被穀物吸收,濃度逐日降低。至240小時, 玉米、高梁或稻穀之處理組分別為170、185及285 ppm;對照組濃度降至550 ppm。 |
英文摘要 | Chambers, made of tin plates 30 x 30 x 150 cm in dimension, and divided into 3 parts, were used for dtecting the horizontal diffusion of phosphine through grain. The middle part, 90 cm long, was fully loaded with corn, sorghum, or paddy rice. Phosphine, generated by aluminum phosphate applied to one end of the chamber, moved horizontally through the interstitial spaces among the grain mass to the other end. Every 24 h, concentration of the phosphine at each and was measured by using Auger gas detecting tubes. At 24 h, the concentrations of phosphine at the application end and the other end of the chamber were 3250 and 400 ppm in corn; and 3600 and 500, 370 and 520, 1200 and 1100 ppm, respectively, in sorghum, paddy rice and the control. The ratios of the concentrations at the application end to the other end were 1:0.12, 1:0.14, 1:0.14 and 1:0.92 in corn, sorghum, paddy rice and the control. In the control, the concentration between the ends balanced at 48 h, being 1100 ppm; however, in corn or paddy rice, it reached balance at 144 h, the concentration being 410 and 500 ppm. Due to the oxidation and absorption by the grain, the phosphine concentration decreased day by day. At 240 h, the average concentration was 550, 170, 185 and 285 ppm, in the control, corn, sorghum and paddy rice, respectively. |
本系統中英文摘要資訊取自各篇刊載內容。