Bulletin Board Ideas by Theme. Our Bulletin Board Ideas by Theme pages provide you with resources to help display your students' learning while keeping your classroom walls looking great all year long. Within each theme you will find fun and educational resources that are specific to the various topics covered within that theme. Several of the bulletin boards even include photos.
Background for the Kjeldahl determination of Organic Nitrogen. The Kjeldahl method is an analytical method for the determination of nitrogen in the trinegative state in certain organic compounds. The method was developed in 1883 by Johan Kjeldahl, a Danish chemist, and is used extensively in the determination of protein in foods, since protein is a macromolecule made up of nitrogen containing amino acids linked together.
Kundt's tube-a measuring instrument used to measure the speed of sound. lidar-a measuring system that detects and locates objects on the same principle as radar but uses light from a laser; a potential technology for detecting air turbulence that can affect aircraft.og-measuring instrument that consists of a float that trails from a ship by a knotted line in order to measure the ship's speed through the water. measuring rod, measuring stick, measure-measuring instrument having a sequence of marks at regular intervals; used as a reference in making measurements.