Beta Transitions

nearly 10 years have passed since the first edition of this book. much progress has been made during the past decade, especially in high resolution gamma-ray spectrometry using semiconductor detectors. the increasing efficiency and the improving energy resolution made the scientists realize that they had at hand a new and beautiful research tool. improved amplifying and analyzing equipment were necessary to realize the full abilities of high resolution detectors.

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Figure 80-6 Oncogene signaling pathways are activated during tumor progression and promote metastatic potential. This figure shows a cancer cell that has undergone epithelial to mesenchymal transition (EMT) under the influence of several environmental signals. Critical components include activated transforming growth factor beta (TGF-β) and the hepatocyte growth factor (HGF)/c-Met pathways, as well as changes in the expression of adhesion molecules that mediate cell-cell and cellextracellular matrix interactions.

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