density range
51electrochemical reaction — ▪ chemistry Introduction any process either caused or accompanied by the passage of an electric current and involving in most cases the transfer of electrons between two substances one a solid and the other a liquid. Under ordinary… …
52Polystyrene — For other uses, see Polystyrene (disambiguation). Expanded polystyrene packaging …
53Image scanner — Desktop scanner, with the lid raised. An object has been laid on the glass, ready for scanning …
54South American Indian — ▪ people Introduction member of any of the aboriginal peoples inhabiting the continent of South America. The customs and social systems of South American peoples are closely and naturally related to the environments in which they live …
55Bass trap — Bass Traps are acoustic absorbers or sound baffles which have the ability to capture low frequency sound. Bass traps are used to provide acoustic absorptive treatment in rooms and are common tools used in architectural acoustics. Bass traps are… …
56Preclinical imaging — is the visualization of animals for research purposes, such as drug development. Imaging modalities have long been crucial to the researcher in observing changes, either at the organ, tissue, cell, or molecular level, in animals responding to… …
57Composite material — A cloth of woven carbon fiber filaments, a common element in composite materials Composite materials, often shortened to composites or called composition materials, are engineered or naturally occurring materials made from two or more constituent …
58Unsharp masking — is an image manipulation technique now familiar to many users of digital image processing software, but it seems to have been first used in Germany in the 1930s as a way of increasing the acutance, or apparent sharpness, of photographic images.… …
59Microcellular plastic — foam is a plastic composite that has been specially fabricated so as to created micro pores or cells in the polymer matrix. The common definition includes foams with pore size on the order of 10 micrometers in diameter (from 0.1 to 100… …
60Quay Valley, California — Quay Valley, also referred to as Quay Valley Ranch, is a proposed planned community consisting of about 12,000 acres (18.75 square miles) in unincorporated Kings County, California, located approximately halfway between Los Angeles and San… …
