accurate measurement
51Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
52Diabetes in dogs — Illustration of a dog s pancreas. Cell islet in the illustration refers to a pancreatic cell in the Islets of Langerhans, which contain insulin producing beta cells and other endocrine related cells. Permanent damage to these beta cells results… …
53Pipette — A pipette (also called a pipet, pipettor or chemical dropper) is a laboratory instrument used to transport a measured volume of liquid.Use and variationsPipettes are commonly used in chemistry and molecular biology research as well as medical… …
54Mark XIV bomb sight — The Mk. XIVA sighting head, which would be mounted in the front of the aircraft and connected to the computor by the cables coiled up on the left. The main features are the gyrostabilizer in the large cylinder, and the collimator on the moving… …
55Humboldtian science — is a term given to the movement in science in the 19th century. The ideals and central themes of Humboldtian science are the result of the work of German scientist Alexander von Humboldt. However, Humboldtian science is a movement and thus is not …
56Numerical control — CNC redirects here. For other uses, see CNC (disambiguation). A CNC Turning Center …
57Bessel, Friedrich Wilhelm — born July 22, 1784, Minden, Brandenburg died March 17, 1846, Königsberg, Prussia German astronomer. He was the first to measure (by means of parallax) the distance to a star other than the Sun. One of his major discoveries was that the bright… …
58eye, human — ▪ anatomy Introduction specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit The eye is protected from mechanical injury… …
59sample preparation — ▪ chemistry Introduction in analytical chemistry (chemistry), the processes in which a representative piece of material is extracted from a larger amount and readied for analysis. Sampling and sample preparation have a unique meaning and special …
60Electricity meter — Typical North American domestic analog electricity meter …
