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Experimental evidence of trophic cascades initiated by large vertebrate predators is rare in terrestrial ecosystems. A… Expand Daily stem radial growth of balsam fir [Abies balsamea (L.) Mill.] was studied between 1998 and 2001 using automated point… Expand Background: We aimed to determine the prevalence of contact sensitization in the general population and to investigate… Expand Invading non-indigenous species in the United States cause major environmental damages and losses adding up to more than $138… Expand Propolis is a multifunctional material used by bees in the construction and maintenance of their hives. Use of propolis by humans… Expand Aspen (Populus tremuloides Michx.) and balsam poplar (Populus balsamifera L.) are major components of the forest resource in the… Expand The controls of potential nitrogen mineralization, nitrate production, and nitrate mo- bilization in a wide range of forest… Expand Many different techniques have been used in the past an,d are being used at the present time with varying degrees of successss… Expand 1. A new type of hyaline, colourless cuticle, called rubber-like cuticle, is described and analysed qualitatively with respect to… Expand THIS note describes the histological demonstration of mucin by Schiff's reagent following the action of periodic acid. Zenker… Expand