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An aliquot of the library (400 l) was centrifuged again, and the pellet frozen at 80 C to serve as the time-zero sample

53 In Man and the Natural World (1983), the historian Keith Thomas thus envisaged the whole of English history as one of almost continuous deforestation, concluding provocatively that it was not on Tower Hill that the axe made its most important contribution to English history

Moreover, the two species look different when placed under a microscope drugstore beetles have a pair of wings, while carpet beetles dont

These unmonitored chemicals are so toxic California advised cannabis enforcement agents to wear hazmat suits and respirators during field inspections, and to undergo annual blood poisoning tests

Jrvholm B, Larsson S, Hagberg S, Olling S, Ryd W, & Torn K (1993) Quantitative importance of asbestos as a cause of lung cancer in a Swedish industrial city: a case-referent study