Acknowledgements I would like to thank the editors and Charlotte Karam for their helpful comments on an earlier version of this manuscript. The section on ‘The Problem of the Nature and Inclusion of Higher Level Units’ has been adapted from Fischer, R., Ferreira, M. C., Assmar, E. M. L., Redford, P., & Harb, C. (2005). Organizational behaviour across cultures: Theoretical and methodological iss...

We investigated methacholine (MCh)-induced bronchoconstriction in explanted airways from Fischer and Lewis rats. Lung explants, 0.5- to 1.0-mm thick, were prepared from agarose-inflated lungs of anesthetized 8- to 12-wk-old male rats. After overnight culture, videomicroscopy was used to record baseline images of the individual airways. Dose-response curves to MCh were then constructed by repeat...

the present study was undertaken to investigate the role of banana extract (be) on synchronous plantlet formation from seeds of dendrobium lituiflorum lindl. the seedlings formed on modified knudson c (kc) medium supplemented with 20% (v/v) be had significantly high fresh and dry weights. morphologically uniform plantlets with elongated leaves and well developed roots were formed on kc medium w...