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“showed a trend”

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Effects of Elevated Root-Zone CO 2 on Nitrogen Concentration Under elevated root-zone CO 2 , the contents of total nitrogen, nitrate nitrogen (NO 3 − -N), and ammonium nitrogen (NH 4 + -N) in the roots of oriental melons all showed a trend of an early increase and a later reduction ( Figure 7 ).
The testing of severe plastically deformed (SPD) nanocrystalline and ultrafine tungsten, where both elongated ultrafine (˂500 nm) and nanocrystalline (˂100 nm) grains coexist under low energy He + implantation and high temperatures (1223 K), showed a trend in both damage and He bubble formation as a function of grain size [ 15 ].
For example, poly( l -lactide-CO-D, l -lactide) scaffolds loaded with TGF-β3 and BMP-2 and implanted into a rat segmental defect model demonstrated enhanced bone regeneration compared to empty defects and showed a trend towards enhancing bone formation compared to scaffolds not containing TGF-β3 and BMP-2 [26] .