Abstract: In one embodiment, the present invention provides a computer-assisted method for providing personalized product information to a user. A survey group comprising one or more members is defined and a personal information set relating to each member of the survey group, the personal information set comprising at least one variable relating to a personal characteristic of a member, is stored. A query set is sent over a computer network to the survey group, the query set comprising at least one question relating to the survey group's use of a product. Responses to the query set are received, over the computer network, from members of the survey group, and the responses are sorted based on the personal information set into a result set. The result set is stored at a central location. A user sends an inquiry over the computer network to the central location, the inquiry relating to information included in the query set.

Abstract: A sensor assembly for electrochemical analysis of a substance comprises a housing and electrodes for sensing selective gases and ions within the housing. A sampler is associated with the housing for introducing the substance to be analyzed into the housing and for allowing the selective gas and ion content thereof to be sensed without physical contact with the gas and ion sensing electrodes. A method of detecting gases and ions in a substance comprises withdrawing a quantity of a substance from a source and directly contacting the substance with a gas and ion permeable medium as it is withdrawn from the source. Gases and ions are caused to permeate through the medium whereupon the gases and ions are detected by a sensing mechanism.

Abstract: Assaying of fluids to determine the level of a substance in a fluid sample such as blood serum involving the reacting of fluid samples with one or more reagents and centrifugally separating reaction constituents and measuring a property of a reaction constituents.