How can we determine that post-and-lintel construction was not used to build the house at mezhirich? neither wood nor daub (mud) has been found at the site. the "walls" and "ceiling" are composed of single continuous forms. the structure was intended as a dwelling, not for a ceremonial purpose. a hearth was placed at the center of the structure?

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characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.

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the electromagnetic energy from the sun arrives in the form of visible and invisible light.