84 research outputs found
The globalization of naval provisioning: ancient DNA and stable isotope analyses of stored cod from the wreck of the Mary Rose, AD 1545.
A comparison of ancient DNA (single-nucleotide polymorphisms) and carbon and nitrogen stable isotope evidence suggests that stored cod provisions recovered from the wreck of the Tudor warship Mary Rose, which sank in the Solent, southern England, in 1545, had been caught in northern and transatlantic waters such as the northern North Sea and the fishing grounds of Iceland and Newfoundland. This discovery, underpinned by control data from archaeological samples of cod bones from potential source regions, illuminates the role of naval provisioning in the early development of extensive sea fisheries, with their long-term economic and ecological impacts
Nitrogen fixation and growth response of Alnus rubra amended with low and high metal content biosolids
Ductile-Phase Toughening of Brazed Joints
A heat treatment is presented that uses ductile-phase toughening to mitigate the effect of brittle intermetallics in a Ni-based braze alloy. The fracture resistance has been enhanced by creating a microstructure containing elongated ductile γ-(Ni) domains that align, preferentially, across the joint. The development of this beneficial microstructure is based on an understanding of the transient dissolution, isothermal solidification, and coarsening phenomena. Due to slow kinetics, the elimination of intermetallics by diffusion is avoided in favor of ductile domain formation through solidification control. The toughening has been attributed to a combination of bridging and process zone dissipation, enabled by the ductile phase
Predicting changes in the distribution and abundance of species under environmental change
Nitrate cycling in Lake Titicaca (Peru-Bolivia): the effects of high-altitude and tropicality
Observations on within family and between families' variations in growth and nutritional status of larval Atlantic cod reared in mesocosms
Observations on within family and between families variation in growth and nutritional status of larval cod (Gadus morhua) reared in mesocosms
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