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Challenging US Country of Origin Labelling at the World Trade Organization: The Law, The Issues and The Evidence
country of origin marks of origin protectionism Technical Barriers to Trade supply chains, WTO
2014/4/11
Canada and Mexico are formally challenging US country of origin (COOL) legislation at
the World Trade Organization. The industries most affected by COOL are beef and pork.
The effect of COOL on No...
体内遗传标记成团肠杆菌固氮质粒pEA9in vivo Labelling of nif-plasmid pEA9 from Enterobacter agglomerans 339
成团肠杆菌 遗传标记 卡那霉素抗性 质粒消除 同源重组
2007/12/29
用卡那霉素抗性（Kanr）基因对成团肠杆菌固氮质粒pEA9进行活体遗传标记。将来自质粒pEA9的3.0 kb片段（nif ENX）克隆到pBR322载体中，再将卡那霉素抗性（Kanr）基因插入到3.0 kb的片段中,构建成供体质粒pST5。将该质粒转化到含有待标记质粒pEA9的E.a.339菌株中,然后在AP培养基中消除供体质粒，筛选得到40个失去了pST5并保持卡那霉素抗性的克隆，分析表明它们不...
Long-term steady state 13C labelling to investigate soil carbon turnover in grasslands
Long-term steady state 13C soil carbon turnover grasslands
2010/1/14
We have set up a facility allowing steady state 13CO2 labeling of short stature vegetation (12 m2) for several years. 13C labelling is obtained by scrubbing the CO2 from outdoors air with a self-regen...