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测量免疫扩散沉淀环直径多用投影器、显微阅读器、放大器等间接法,也有用卡尺、米尺直接量取者;新近又推出了部分测量标尺,但多数除需间接换算外,还需特殊设备;卡尺、米尺等虽简单,但价格和(或)使用方法并不理想,为此我们设计制作了一种直接测量沉淀环直径的简易标尺,供同道试用。制作原理长方形的两条对边分别与圆的两边缘相外切时,另外两条边的长即为该圆的直径。制作材料标准直尺(5cm或10cm)2把,平直板(长5～10cm)2块。制作方法取标准直尺2把,把起始端(“0”点)分别固定于平直板上(称固定板),使“0”点恰好重合在平析边缘,并分别与其垂直,两把直尺间距
Measurement of immunodiffusion precipitation ring diameter with projector, micro-readers, amplifiers and other indirect methods, but also useful calipers, meters directly measure those who have recently introduced some of the measuring ruler, but in addition to the need for indirect conversion, the need for special Equipment; calipers, meters and other simple, but the price and (or) the use of methods is not ideal, for which we have designed a direct measurement of precipitation ring diameter simple ruler for fellow trial. Production principle Two opposite sides of the rectangle are circumscribed with the two edges of the circle respectively. The length of the other two sides is the diameter of the circle. Production materials Standard ruler (5cm or 10cm) 2, flat plate (length 5 ~ 10cm) 2. Production method Take standard ruler 2, the starting end ( “0 ” point) are fixed on the flat plate (said fixed plate), so that “0 ” point just coincides with the edge of the parallelepiped, , Two ruler spacing