Di

(redirected from desorption ionisation)
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Di

(chemistry)

DI

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

DI press

(Digital Imaging press) A four-color digital offset printing press that uses lasers to thermally image the printing plates "on-press." DI presses provide better registration, broader color gamut with higher density, less dot gain and sharper details than traditional offset presses, where the plates are created "off-press" via exposure to film or on a computer-to-plate system (see CTP). DI presses accept only blank plates, and all four plates (CMYK) are simultaneously imaged with great precision. In addition, DI presses are waterless and do not require continuous ink-water balancing. Designed for fast make-ready and short runs, the entire operation is automated, from plate advancing to imaging, printing and cleaning.

The DI direct-to-press method was invented by Presstek, Inc., Hudson, NH (www.presstek.com), and the company licenses the technology to DI press manufacturers. In partnership with Presstek, Heidelberg was the first company to introduce a DI press in 1993. Initially using spark discharge technology for imaging, lasers were used in subsequent models. See CTP, digital printing, prepress and offset press.

digital intermediate

A digital version of a motion picture that was originally shot on film. The 35mm film is scanned and converted to digital for ease in editing or to apply special graphics effects and animation. The results are converted back to film for distribution to theaters with 35mm projectors. See nonlinear video editing and digital cinema.
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References in periodicals archive ?
The new Matrix-Assisted Laser Desorption Ionisation time-of-flight mass spectrometry based test for hbA1c and genetic hemoglobin variants is intended for use on the MALDI Biotyper platform is likely to provide specificity, accuracy, speed of analysis and cost per analysis.
Abbreviations 2-DE: 2 Dimensional electrophoresis CE: Capillary electrophoresis ESI: Electrospray ionisation LC: Liquid chromatography MALDI: Matrix assisted laser desorption/ionisation MELDI: Material-enhanced laser desorption/ionization MS: Mass spectroscopy SELDI: Surface enhanced laser desorption ionisation TOF: Time of flight.
Fenn, Virginia Commonwealth University, Richmond, VA, and Koichi Tanaka of Shimadzu Corp., Kyoto, Japan, "for their development of soft desorption ionisation methods for mass spectrometric analyses of biological macromolecules." The other half is for Kurt Wuthrich, from the Swiss Federal Institute of Technology (ETH) in Zurich and The Scripps Research Institute in the U.S., "for his development of nuclear magnetic resonance spectroscopy for determining the three-dimensional structure of biological macromolecules in solution."
It covers techniques such as electron and chemical jonisation and newer soft ion-isation techniques such as matrix-assisted laser desorption ionisation and electrospray.