New branches for old roots

Nucleating New Branches from Old

Centrosome- and chromatin-based microtubule nucleation pathways have been implicated in spindle assembly. Using total internal reflection fluorescent microscopy and Xenopus egg extracts, Petry et al. demonstrate that new microtubules can also nucleate and branch out from existing ones in animal cells.

New Branches, Old Roots: A Study of Methods and Techniques in Web/Hypermedia Systems Design

Brian Fitzgerald holds the Frederick A Krehbiel II Chair in Innovation in Global Business and Technology at the University of Limerick and is also a Science Foundation Ireland Investigator. His publications include 7 books and more than 60 papers, published in leading international conferences and journals. Despite claims in the literature that " traditional " methods and techniques are inadequ...

Feminist Therapy: Roots and Branches

Oocyte Family Trees: Old Branches or New Stems?

1 Vincent Center for Reproductive Biology, MGH Vincent Department of Obstetrics and Gynecology, Massachusetts General Hospital, Boston, Massachusetts, United States of America, 2 Department of Obstetrics, Gynecology and Reproductive Biology, Harvard Medical School, Boston, Massachusetts, United States of America, 3 Institute of Cell Biology and Centre for Integrative Physiology, University of E...

The roots and branches of human altruism.

The authors' rigorous and ingenious programme of work documents young humans' capacity for prosocial action (Warneken & Tomasello, 2009). Their laboratory findings are corroborated by centuries of observational data, spanning cultures, and historical epochs. Two general questions are raised. Firstly, what are the rules of evidence needed in using comparative data to make claims about the evolut...