Biorefinery Design Strategy: From Process Synthesis to Sustainable Design

Biorefineries ◽  
2018 ◽  
pp. 65-97
Author(s):  
Carlos Ariel Cardona Alzate
2017 ◽  
Vol 38 ◽  
pp. 234-241 ◽  
Author(s):  
T.K. Efthimiadou ◽  
Th.N. Nikolaidis ◽  
C.C. Baniotopoulos

1988 ◽  
Vol 132 ◽  
pp. 501-506
Author(s):  
C. Sneden ◽  
C. A. Pilachowski ◽  
K. K. Gilroy ◽  
J. J. Cowan

Current observational results for the abundances of the very heavy elements (Z>30) in Population II halo stars are reviewed. New high resolution, low noise spectra of many of these extremely metal-poor stars reveal general consistency in their overall abundance patterns. Below Galactic metallicities of [Fe/H] Ã −2, all of the very heavy elements were manufactured almost exclusively in r-process synthesis events. However, there is considerable star-to-star scatter in the overall level of very heavy element abundances, indicating the influence of local supernovas on element production in the very early, unmixed Galactic halo. The s-process appears to contribute substantially to stellar abundances only in stars more metal-rich than [Fe/H] Ã −2.


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