All major cities have equipment to identify or rule out certain classes of chemicals.
In the past 4 years, Senomyx has tested over 20 million samples, and its sweetener program has identified the 3 most promising classes of chemicals.
Think about it this way: our tongues have taste buds that are responsive to five classes of chemicals, which we perceive as sweet, sour, salty, bitter, and savoury.
By correlating classes of chemicals with biological activity, the program can tell researchers which features of a test compound are important.
In addition, some organisms have other types of receptors that permit them to distinguish between classes of chemicals not directly related to diet and that enable them to make further distinctions within the modalities.
Every country in the world is a party to the Protocol, and it has successfully phased out or is in the process of phasing out several key classes of chemicals, including chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), and halons.
For other classes of chemicals, toxicity may occur in taxonomic groups other than the target species.
The organic phase can be separated into individual chemicals or can be upgraded to yield specific classes of chemicals.
Metabolic engineering offers the potential to renewably produce important classes of chemicals, particularly biofuels, at an industrial scale.
Evidence is mounting that some classes of chemicals have toxic effects at even minute doses, and some can accumulate in places where we least want them.
Results showed that all extracts contained compounds belonging to the classes of polyphenols, triterpenes and steroids, other classes of chemicals being selectively distributed.
