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We often take it for granted that we know the difference between a cat and a dog. Where and how do we store the visual information that categorizes “catness” in our minds, so that the next time we see a cat, we know that it is not a dog? Earl Miller has studied this process of categorization with m ...

Four species are added: Zealeuctra fraxina, Alloperla idei, Sweltsa palearata,and Acroneuria kirchneri; Allocapnia wrayi is returned to the Pennsylvania stonefly record, bringing the total to 139 described species. Newrecords and information on 25 rare species are also presented.

Strategies are sought to reduce intestinal colonisation of food-producing animals by Compylobacter jejuni, a leading bacterial cause of human foodborne illness worlwide. Presently, we tested the antimicrobial activity of hydrolysable-rich blackberry, cranberry and chestnut tannin extracts and conden ...