The reaction of (1R)-(-)-myrtenal-derived benzothiazoline with nickel(II) acetate in ethanol exclusively gave a Schiff base-type nickel(II) complex having M helical configurational myrtenyl arms, which is reversibly converted to a non-innocent-type complex having additional S,S configurational asymmetric carbon centres.

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The distribution of nitrite- and N2O-reducing bacteria is key to potential N2O emission from lakes. However, such information in highland saline lakes remains unknown. Here, we investigated the abundance and community composition of nitrite- and N2O-reducing bacteria in the sediments of six saline lakes on the Qing-Tibetan Plateau. These studied lakes covered a wide range of salinity (1.0-340.0 g/L). Results showed that in the studied saline lake sediments nitrite-reducing bacteria were significantly more abundant than N2O-reducing bacteria, and their abundances ranged 7.14×103-8.26×108 and 1.18×106-6.51×107 copies per gram sediment (dry weight), respectively. Nitrite-reducing bacteria were mainly affiliated withα-, β-, and γ- Proteobacteria, with β- and α-Proteobacteria being dominant in low- and high-salinity lakes, respectively; N2O-reducing bacterial communities mainly consisted of Proteobacteria (α-, β-, γ-, and δ-subgroups), Bacteroidetes, Verrucomicrobia, Actinobacteria, Chloroflexi, Gemmatimonadetes and Balneolaeota, with Proteobacteria and Bacteroidetes/Verrucomicrobia dominating in low- and high-salinity lakes, respectively. The nitrite- and N2O-reducing bacterial communities showed distinct responses to ecological factors, and they were mainly regulated by mineralogical and physicochemical factors, respectively. In response to salinity change, the community composition of nitrite-reducing bacteria was more stable than that of N2O-reducing bacteria. These findings suggest that nitrite- and N2O-reducing bacteria may prefer niches with different salinity.