为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

Two new compounds, lethaclado acid A (1) and B (2), were isolated from the acetone extract ofLethariella cladonioides. T......

采用电喷雾多级质谱方法，研究了三个从地衣中提取到的缩酚酸醚类化合物在电喷雾电离质谱中的裂解行为，结果表明它们在电喷雾多级质谱......