Rohlfing D L, McAlhaney W W
Biosystems. 1976 Dec;8(3):139-45. doi: 10.1016/0303-2647(76)90016-2.
Sand was tested as a model of a common "impurity" that could have influenced the formation of thermal prebiotic protein. Increasing proportions of sand (0-16 g) in admixture with one set of reactant amino acids (1g), when heated at 175 degrees C for 1.5 h, resulted in increasing yields of polyamino acids of increasing size and color intensity; amino acid composition was not greatly affected. Similar results were noted for three of five other sets of reactant amino acids (8 g sand per g amino acids). In no case did sand prevent the amino acids from polymerizing. The results are interpreted to indicate a broader range of conditions conducive to the formation of prebiotic protein and to further emphasize that environmental parameters should be considerided in the experimental modeling of prebiotic processes.
沙子作为一种可能影响热前生物蛋白质形成的常见“杂质”模型进行了测试。将沙子（0 - 16克）与一组反应物氨基酸（1克）混合，在175摄氏度下加热1.5小时，随着沙子比例增加，多氨基酸的产量增加，其大小和颜色强度也增加；氨基酸组成受影响不大。对于其他五组反应物氨基酸中的三组（每克氨基酸8克沙子）也观察到了类似结果。在任何情况下，沙子都没有阻止氨基酸聚合。这些结果被解释为表明有利于前生物蛋白质形成的条件范围更广，并进一步强调在模拟前生物过程的实验中应考虑环境参数。
