Archaeological evidence for modes of air supply into iron smelting furnaces in the African Great Lakes region

2016 ◽  
Vol 51 (3) ◽  
pp. 362-379 ◽  
Author(s):  
Edwinus C. Lyaya
1969 ◽  
Vol 34 (4) ◽  
pp. 365-375 ◽  
Author(s):  
Melvin L. Fowler

AbstractAerial photographs made with hand-held cameras and taken from small aircraft revealed soil discolorations on two sites in Illinois. The light and dark parallel lines were interpreted as evidence of prehistoric agricultural fields. Evidence of houses in the center of these fields was also noted. Ground reconnaissance, controlled surface collecting, and cross-trenching tended to confirm this interpretation. These data were compared with archaeological evidence from Macon Plateau in Georgia and historic records for the Great Lakes region. It is proposed that Mississippian agriculture was based upon a field system and a technique of ridge-furrow cultivation that made it possible to utilize low-lying river bottom land.


Author(s):  
Jean Claude Semuto Ngabonziza ◽  
Chloé Loiseau ◽  
Michael Marceau ◽  
Agathe Jouet ◽  
Fabrizio Menardo ◽  
...  

AbstractThe human- and animal-adapted lineages of the Mycobacterium tuberculosis complex (MTBC) are thought to have clonally expanded from a common progenitor in Africa. However, the molecular events that accompanied this emergence remain largely unknown. Here, we describe two MTBC strains isolated from patients with multidrug-resistant tuberculosis, representing an as-yet-unknown lineage, named Lineage 8 (L8), seemingly restricted to the African Great Lakes region. Using genome-based phylogenetic reconstruction, we show that L8 is a sister clade to the known MTBC lineages. Comparison with other complete mycobacterial genomes indicate that the divergence of L8 preceded the loss of the cobF genome region - involved in the cobalamin/vitamin B12 synthesis - and gene interruptions in a subsequent common ancestor shared by all other known MTBC lineages. This discovery further supports an East African origin for the MTBC and provides additional molecular clues on the ancestral genome reduction associated with adaptation to a pathogenic lifestyle.


2008 ◽  
Vol 40 (5) ◽  
pp. 467-490 ◽  
Author(s):  
Deo B. Ndumu ◽  
Roswitha Baumung ◽  
Olivier Hanotte ◽  
Maria Wurzinger ◽  
Mwai A. Okeyo ◽  
...  

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