elsevier bv okt 2002 (2 Ergebnisse)

Buch. Zustand: Neu. Neuware - Six Sigma is Business and Industry's newest recognized quality program. This text provides information and instructions for new and current quality professionals in order to help employ methods to attain Six Sigma defect quality assurance within their company.All areas of business and manufacture are covered. Detailed checklists, questionnaires and forms assist personnel in developing their own programs to 'prevent' problems from occurring and to solve new and long-term problems in services and manufacturing. Examples and formulae are provided for use to determine if, when and then how much a process may be adjusted for reaching higher quality assurance levels. Knowledgeable readers will be able to use this comprehensive text immediately in the workplace.

Buch. Zustand: Neu. Neuware - Countercurrent chromatography (CCC) is a separation technique in which the stationary phase is a liquid. The mobile phase is also a liquid, so biphasic liquid systems with at least two solvents are used. Centrifugal fields are used to hold the liquid stationary phase while pushing the liquid mobile phase through it.This comprehensive reference covers recent advancements in the two types of CCC machines: the high speed CCCs without rotary seals and with coiled spools and centrifugal partition chromatographs (CPC) with rotary seals and interconnected channels. Written by leading international experts in the CCC field, the book focuses on the liquid nature of the stationary phase: giving newcomers the basis to do CCC efficiently and rapidly; explaining the art of obtaining a biphasic liquid system; describing the flow patterns in both CPC and high speed CCC machines; showing possible other uses of a liquid stationary phase; presenting a wealth of applications in the separation of organic, pharmaceutical and inorganic mixtures; and demonstrating that even supercritical fluids can be used in CCC.