The molecules were acting like enzymes , and yet they were much , much smaller : the molecular weight of a taml is about 500 daltons ( a dalton is equal to one twelfth the mass of carbon 12 , the most abundant isotope of carbon ) , whereas the weight of horseradish peroxidase , a relatively small enzyme , is about 40 , 000 daltons 这些分子的作用方式很像酵素，不过远比酵素小得多：一个taml的分子量大约是500道尔顿（ 1道尔顿等于氢原子的质量） ；相较之下，在酵素里算小的辣根过氧化酶，分子量就约有四万道尔顿。
This paper is intended to briefly account the explorations of curricular construction , student autonomy and the like reforms performed by shu xincheng in shanghai public schools in line with the daltonian system , so as to demonstrate shu ' s charming personality in his courage to introduce and adapt the reformsto the chinese education 摘要通过探索舒新城在上海中国公学中学部所进行的有关选科制、学科制、课程结构以及学生自治会改革，特别是剖析了其对道尔顿制在上海的引进、实验、困惑及其反思，再现了新教育改革家的个性魅力，肯定了适合国情、综合创造的本土化教育改革的学术价值和现实意义。
