Petrifaction of Plant Tissue in the Laboratory
Petrifaction of Plant Tissue in the Laboratory
复制标题
实验室植物组织的石化
作者：
R. W. Drum
植物组织可以通过用具有高浓度溶解硅酸盐的天然沃茨浸渍来石化1。这种情况通常发生在新西兰、爱尔兰和美国黄石公园的火山沉积物中。这个过程很容易在实验室中以下列方式复制。将小块植物材料（Icm 3或更小）置于250 ml中。聚乙烯烧杯，50-100 ml。5-10分钟后，将2-5 g偏硅酸钠（Na 2SiO 3：9 H2O）搅拌到烧杯中，然后使其静置12-24 h。pH值上升到14。然后将材料用去离子H2O洗涤几次，使其在2N HCl中浸泡30分钟;使用沸腾的浓硝酸（1份）和浓铬酸（1份）2通过湿灰化除去有机材料。
PLANT tissue can be petrified by impregnation with natural waters with a high concentration of dissolved silicate1. This occurs commonly in springs issuing from volcanic deposits in New Zealand, Ireland and Yellowstone Park in America. The process is easily duplicated in the laboratory in the following way. Small pieces of plant material (1 cm3 or less) are placed in 250 ml. polyethylene beakers, 50–100 ml. of deionized H2O (pH. 6.0, which is adjusted by dilute HCl) is added; after 5–10 min, 2–5 g sodium metasilicate (Na2SiO3 : 9 H2O) is stirred into the beakers, which are then allowed to stand undisturbed for 12–24 h. The pH rises to 14. The material is then washed several times with deionized H2O, allowed to soak for 30 min in 2 N HCl; organic material is removed by wet ashing, using boiling concentrated nitric acid (1 part) and concentrated chromic acid (1 part)2.