分面浏览：发表日期 |
| 当前检索式 | ((ALL：chemical method)) |
| 限定条件 | ((专题：北京大学)) |
| 2017 71 | 2016 106 | 2015 108 |
| 2014 104 | 2013 111 | 2012 74 |
| 2011 76 | 2010 65 | 2009 57 |
| 2008 62 | 2007 46 | 2006 45 |
| 2005 36 | 2004 40 | 2003 33 |
| 2002 34 | 2001 20 | 2000 18 |
| 1999 14 | 1998 15 | 1997 22 |
| 1996 23 | 1995 10 | 1994 5 |
| 1993 3 | 1992 5 | 1991 1 |
| 1990 2 | 1989 4 | 1988 3 |
| 1987 1 | 1984 1 |
