Low-temperature concentration of tellurium and gold in continental red bed successions

Acknowledgements This research was supported by NERC grants (NE/L001764/1, NE/M010953/1). We are grateful to J. Still and A. Sandison for technical support and to the gypsum mines and C. Brolley for access and sampling. Critical comments from Cristiana Ciobanu, Eric Gloaguen and Georges Calas are gratefully acknowledged. The authors have no conflicts of interest to declare

Isolation of 'Candidatus Nitrosocosmicus franklandus', a novel ureolytic soil archaeal ammonia oxidiser with tolerance to high ammonia concentration

Acknowledgements. The authors would like to thank Mr Kevin Mackenzie and Mrs Gillian Milne (University of Aberdeen) for technical support with scanning electron microscopy, and Dr Robin Walker for access to the Woodlands Field experimental plots at the SRUC,Craibstone Estate, Aberdeen. This work was financially supported by Natural Environmental Research Council (standard grants NE/I027835/1 and NE/L006286/1 and fellowship NE/J019151/1), EC Marie Curie ITN NORA, Grant Agreement No. 316472, the AXA Research Fund and the Centre for Genome Enabled Biology and Medicine, University of Aberdeen.