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浏览/检索结果: 共3条，第1-3条 帮助 限定条件 发表日期：2020     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 A twin enrichment method based on dispersive liquid-liquid microextraction and field-amplified sample injection for the simultaneous determination of sulfonamides 期刊论文 ANALYST, 2020, 卷号: 145, 期号: 5, 页码: 1825-1832 作者:  Ma, Suya;  Yang, Shixuan;  Song, Zhihua;  Li, Jinhua;  Shi, Qiaocui 收藏  |  浏览/下载：40/0  |  提交时间：2020/07/08 SOLID-PHASE EXTRACTION  CAPILLARY-ELECTROPHORESIS  URINE SAMPLES  WATER SAMPLES  DERIVATIZATION  CHROMATOGRAPHY  TETRACYCLINES  STACKING  RESIDUES  HONEY   How reliable are cultivated land assets as social security for Chinese farmers? 期刊论文 LAND USE POLICY, 2020, 卷号: 90, 页码: 10 作者:  Wang, Yahui;  Li, Xiubin;  He, Huiyan;  Xin, Liangjie;  Tan, Minghong 收藏  |  浏览/下载：33/0  |  提交时间：2020/05/19 Social security theory of cropland  Land abandonment  Rent-free land transfer  Cropland contract rights  Mountainous areas   Species spatial distributions in a warm-temperate deciduous broad-leaved forest in China 期刊论文 JOURNAL OF FORESTRY RESEARCH, 2020, 卷号: 31, 期号: 4, 页码: 1187-1194 作者:  Gu, Huiyan;  Li, Jiaxin;  Qi, Guang;  Wang, Shunzhong 收藏  |  浏览/下载：30/0  |  提交时间：2022/03/01 Spatial distributions  Aggregation intensity  Species functional trait  Secondary warm-temperate deciduous broad-leaved forest