This protocol describes a quantitative and robust 96-well-plate-reader–based assay for the measurement of ethoxyresorufin-O-deethylase (EROD) activity using the rat hepatoma cell line H4IIE. The assay ...

Students will learn how to categorize matter as either pure substances or mixtures. Students will apply tests, based on physical properties of matter samples, to determine whether a mixture is ...

In a public health advisory Friday, the territory's chief public health officer (CPHO) said the sample came back positive for ...

Students will be able to plan and carry out an investigation to identify which two of the three ingredients in baking powder react to produce a gas when water is added. Students will be able to ...

Mixtures of different defense substances: Spruce trees require various monoterpenes — typical components of resin — to combat bark beetles and the fungi associated with them. Specific defense: The ...

Pure and Mixed Substances: In the world of chemistry, substances are broadly classified into two fundamental categories: pure and mixed substances. Understanding these distinctions is crucial as they ...

Four substances have been added in the U.S. Department of Health and Human Services 13th Report on Carcinogens, a science-based document that identifies chemical, biological, and physical agents that ...

(Reuters) - The U.S. Food and Drug Administration on Monday proposed excluding three substances from a list of ingredients that could be used to manufacture compounded medications in bulk for use by ...

The question “What is the difference between a mixture and an alloy?” comes from Ms. Thelen’s class. An alloy is a noun that describes a metal made from the combination of two or more metallic ...