an nas meaning in English

大众报
内斯

3 . study of cnx nanotube cnx nanotube were synthesis by thermal decomposition of ammonium chloride and ethylenediamine in an na / hfo atmosphere , respectively . we found that there is more " bamboo - shaped " in cnx nanotube made with ethylenediamine
根据透射电子显微镜和扫描电子显微镜观察，分析了bcn纳米管的微观结构，扫描俄歇微探针分析表明， 860时，以钻/二茂铁为催化剂时生成的bcn纳米管中b 、 c和n的原子比例为1