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| Effects of the Bow on Social Organization in Western North America |
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submitted by komemoy6 24 minutes ago - Topic: Biology |
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The bow more than doubled, likely tripled, the success of individuals bent on killing animal or human targets (Box ). The advent of this revolutionary technology generated different responses in western North America depending on subsistence and sociopolitical organization at the time of its arri...
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| The Bow and Arrow in Northern North America |
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submitted by komemoy6 24 minutes ago - Topic: Biology |
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There were at least four waves of bow and arrow use in northern North America. These occurred at 12000, 4500, 2400, and after about 1300 years ago. But to understand the role of the bow and arrow in the north, one must begin in the eighteenth century, when the Russians first arrived in the Aleuti...
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| The Bow and Cultural Complexity of the Canadian Plains |
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submitted by komemoy6 24 minutes ago - Topic: Biology |
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The timing and circumstances of the introduction of the bow and arrow into past North American economic and social lifeways have been sources of interest and controversy among archeologists for a very long time. Initial interpretations of the adoption of the bow and arrow generally seem to have b...
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| Social Complexity and the Bow in the Eastern Woodlands |
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submitted by komemoy6 24 minutes ago - Topic: Biology |
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Bingham and Souza have presented an evolutionary theory that specifies a causal relationship between the advent of powerful projectile weapons such as the bow and radical rearrangements in social relations and histories. They propose that the acquisition of weapons that permitted humans to kill a...
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| Conflict and Societal Change in Late Prehistoric Eastern North America |
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submitted by komemoy6 24 minutes ago - Topic: Biology |
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As recently as the 1980s, archeologists focusing on prehistoric eastern North America paid little attention to intergroup conflict. Today the situation is quite different, as indicated by this Special Issue. Archeologists now face three principal challenges: to document the temporal and spatial d...
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| Sedentism, Social Change, Warfare, and the Bow in the Ancient Pueblo Southwest |
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submitted by komemoy6 24 minutes ago - Topic: Biology |
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In the ancient American Southwest, use of the bow developed relatively rapidly among Pueblo people by the fifth century AD. This new technology replaced the millennia-old atlatl and dart weaponry system. Roughly 150 years later in the AD 600s, Pueblo socioeconomic organization began to evolve rap...
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| Sociopolitical Complexity and the Bow and Arrow in the American Southwest |
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submitted by komemoy6 24 minutes ago - Topic: Biology |
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The evolution of sociopolitical complexity, including heightened relations of cooperation and competition among large nonkin groups, has long been a central focus of anthropological research. Anthropologists suggest any number of variables that affect the waxing and waning of complexity and defin...
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| The mitochondrial protein frataxin is downregulated in hemodialysis patients |
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submitted by jaonnolz 25 minutes ago - Topic: Health |
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The mitochondrial protein frataxin regulates iron metabolism for heme and iron sulfur cluster synthesis in the mitochondria and could be associated with the regulation of oxidative stress. To clarify the expression of frataxin and its association with uremia, we evaluated the mRNA and protein lev...
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| A comparison of Japanese and Australian consumers’ sensory perceptions of beef |
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submitted by sakhonjon12 27 minutes ago - Topic: Biology |
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This paper presents a comparison of Japanese and Australian consumer sensory responses to beef, based on Meat Standards Australia methodology. Japanese and Australian consumers evaluated paired beef samples according to four sensory traits, and the weighted results were combined to produce a Meat...
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| Daidzein enhances immune function in late lactation cows under heat stress |
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submitted by sakhonjon12 27 minutes ago - Topic: Biology |
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Heat stress decreases natural immunity making cows more vulnerable to diseases. A previous study reported that daidzein can enhance animal resistance to heat stress and regulate animal immunocompetence. However, it is unclear whether daidzein regulates the immune performance of late lactation cow...
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