Age dating of environmental organic residues

► Minor influence of introduced contaminants during sample preparation for AMS.Chemists in the US have developed a quick and simple way to find out how old bloodstains are using natural fluorescence measurements.

Pictures of this purification technique were found on the wall of the tomb of Amenophis II and Ramses II.

The major motive for water purification was better tasting drinking water, because people could not yet distinguish between foul and clean water.

Turbidity was the main driving force between the earliest water treatments.

Borrow Pit - that area, usually adjacent and parallel to a road, from which soil is removed to build up the road bed Bottom Lands - a term often used to define lowlands adjacent to streams and rivers Broad-Based Dip - a surface drainage structure specifically designed to drain water from an access road while allowing vehicles to maintain normal travel speeds Buck - to saw felled trees into predetermined lengths Bucking - the process of cutting a tree into shorter lengths Buffer Strip - a narrow piece of land bordering an area such as a stream or road with forestry practices that are different from adjacent areas Bunching - grouping of trees or logs together to form a load before being transported Bundle Scar - a small scar in a leaf scar left by a vascular bundle Back to Top Cambium - a layer of cells located inside the bark between the xylem (wood) and phloem (inner bark) Caliche soil - is a hardened mineral of calcium carbonate.

It forms when rain dissolves calcium found in rocks and minerals, carrying it down into the soil, so layers of deposits build up over the years.