Potential functions selection principles

Depending on the gas type and application, different gas detection and sensor principles may be suitable. Beside the price, there are other parameters like accuracy, power consumption, long-term stability, lifetime, selectivity and sensitivity which have to be taken into account. However, whether a sensor is developed into a product depends on the relation between additional functionality and additional cost. In the subsequent chapters we intend to give an overview of common sensor principles and their potential use in household appliances. In order to give some information about existing (commercialized) sensors and sensor systems each subchapter is completed by an amendment listing a selection of relevant gas sensor products. 

Three types of potential targets for antiparasitic chemotherapy can be discerned. Firstly, enzymes unique for the parasite could be present. Secondly, enzymes for which alternative pathways exist in the host may be targeted. And thirdly, in principle similar biochemical functions for parasite and host can differ enough to provide, if pharmacologically influenced, some selectivity. Apart from these three types of mechanisms there are antiparasitic agents for which the mechanism has not been identified. 

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