1 While there are wonderful female chefs such as Nigella Lawson and Martha Stewart, I disapprove of the stereotype that women do all of the cooking and cleaning and looking after the children. 2  Everyone looks at me and wonders why I hate make-up and dresses. 3  I dislike shopping and cooking and cleaning.
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Catalysis is the change in speed (rate) of a chemical reaction due to the help of a catalyst. Unlike other chemicals which take part in the reaction, a catalyst is not consumed by the reaction itself. A catalyst may participate in many chemical reactions.Catalysts that speed the reaction are called positive catalysts. Catalysts that slow the reaction are called negative catalysts, or inhibitors.Substances that increase the activity of catalysts are called promoters, and substances that deactivate catalysts are called catalytic poisons. A catalyst is something which changes the rate of a chemical reaction.atalysts that slow the reaction are called negative catalysts, or inhibitors. Substances that increase the activity of catalysts are called promoters, and substances that deactivate catalysts are called catalytic poisons. A catalyst is something which changes the rate of a chemical reaction.