toxics Article The Difference between Rhizosphere and Endophytic Bacteria on the Safe Cultivation of Lettuce in Cr-Contaminated Farmland Zheyu Wen 1, Qizhen Liu 1, Chao Yu 2,*, Lukuan Huang 1, Yaru Liu 1, Shun'an Xu 1, Zhesi Li 1, Chanjuan Liu 1 and Ying Feng 1,* 1 MOE Key ...
(H2): Innovative environment has a positive effect on technology innovation, while regional differences and temporal variations of effect size exist. There are many arguments about the relationship between enterprise scale and innovation efficiency [35,36]. For instance, Pavitt, Robson and Townsend (...