Chinese exchanges easier

Breathing easier.

Breathing Easier

Guangyu Zhu, Jia Chen, Jay Liu, Joseph S Brunzelle, Bo Huang, Nancy Wakeham, Simon Terzyan, Xuemei Li, Zihe Rao, Guangpu Li and Xuejun C Zhang* Crystallography Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA, National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China, Department of Biochemistry and Molecular Biol...

Not breathing easier.

were the clinical variables affecting survival. The histological variables related to survival were; mitotic count, necrosis, nuclear pleomorphism, vascular and lymphatic permeation and an undifferentiated growth pattern. All these features could be detected with routine histological stains, whereas immunocytochemical methods for demonstrating neuron specific enolase were of no help in assessin...

Assignment Exchanges

Assignment Exchanges Paul Milgrom September 6, 2008 Abstract. We analyze assignment exchanges –auction and exchange mechanisms which are tight simplifications of direct Walrasian exchange mechanisms. These simplifications are distinguished by their use of “assignment messages,” which parameterize certain substitutable preferences. The “basic” assignment exchanges respect integer constraints, ge...

Marriage exchanges, seed exchanges, and the dynamics of manioc diversity.

The conservation of crop genetic resources requires understanding the different variables-cultural, social, and economic-that impinge on crop diversity. In small-scale farming systems, seed exchanges represent a key mechanism in the dynamics of crop genetic diversity, and analyzing the rules that structure social networks of seed exchange between farmer communities can help decipher patterns of...