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Topic Area: Chemistry

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Displaying records 921 to 930 of 1000 records.
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921. Influence of Secondary Tip Shape on Illumination-Mode Near-Field Scanning Optical Microscopy Images
Topic: Chemistry
Published: 8/1/1999
Authors: Lee J Richter, C EJ Dentinger, Richard R Cavanagh, Garnett W Bryant, A Liu, Stephan J Stranick, C D Keating, M J Natan
Abstract: We report illumination-mode near-field optical microscopy images of individual 80-115 nm diameter Au particles recorded with metal-coated fiber probes. It is found that the images are strongly influenced by the metal-coating thickness. This depend ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831088

922. SRM 2806 (ISO Medium Test Dust in Hydraulic Oil): A Particle-Contamination Standard Reference Material for the Fluid Power Industry
Topic: Chemistry
Published: 8/1/1999
Authors: Robert A Fletcher, Jennifer R Verkouteren, Eric S Windsor, David S. Bright, Eric B Steel, John A Small, Walter S Liggett Jr
Abstract: Standard Reference material (SRM) 2806 is composed of ISO medium test dust (ISO 12103-A3), a mineral dust, suspended in MIL-H-5606 hydraulic oil. SRM 2806 is a traceable particle count standard and is certified for number of particles larger than ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831080

923. Si Resonant Interband Tunnel Diodes Grown by Low-Temperature Molecular Beam Epitaxy
Topic: Chemistry
Published: 8/1/1999
Authors: P E Thompson, K D Hobart, M E Twigg, G Jernigan, T E Dillon, S L Rommel, P R Berger, David S Simons, P Chi, R Lake, A C Seabaugh
Abstract: Si resonant interband tunnel diodes that demonstrate negative differential resistance at room temperature are presented. The structures were grown using low temperature (320 C) molecular beam epitaxy followed by a post-growth anneal. After a 650 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831118

924. What Do We Need to Look Out for When Doing Energy Dispersive X-Ray Analysis in the Environmental Scanning Electron Microscope?
Topic: Chemistry
Published: 8/1/1999
Author: Scott A Wight
Abstract: Electron scattering in the environmental scanning electron microscope may contribute x-ray contamination to quantitative analysis. A series of experiments explores at what range and conditions the analyst in the real world needs to be concerned about ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831119

925. An Ultra-Small-Angle Neutron Scattering Study of the Restructuring of Sheared Colloidal Silica Gels
Topic: Chemistry
Published: 7/5/1999
Authors: Chris D Muzny, B D. Butler, H J Hanley, M Agamalian
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100736

926. Sampling Accessories for Infrared Spectrometry
Topic: Chemistry
Published: 7/1/1999
Author: Thomas J Bruno
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100672

927. A Model for Drag Forces in the Crevice of Piston Gages in the Viscous and Molecular Flow Regimes
Topic: Chemistry
Published: 6/1/1999
Authors: James W Schmidt, Charles D Ehrlich, S A Tison
Abstract: A model for drag forces in the crevice of pneumatic piston gages is presented. The model uses an interpolation function for momentum transfer between the piston and the cylinder mediated by the gas flowing in the crevice. The interpolation function ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830639

928. A primary pressure standard at 100 kPa
Topic: Chemistry
Published: 6/1/1999
Authors: James W Schmidt, Y Q Cen, Robert G Driver, Walter J. Bowers Jr., J C. Houck, S A Tison, Charles D Ehrlich
Abstract: Primary pressure standards in the atmospheric pressure range are often established using mercury manometers. To a lesser extent controlled-clearance dead-weight testers in which one component (normally the piston) has been dimensionally measured hav ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830636

929. The Three-dimensional Structures of Two Isoforms of Nucleoside Diphosphate Kinase from Bovine Retina
Topic: Chemistry
Published: 6/1/1999
Authors: Jane E Ladner, N G Abdulaev, D L Kakuev, M. Tordova, K D. Ridge, G L. Gilliland
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100589

930. Incorporation of Non-Steady Unimolecular and Chemically Activated Kinetics into Complex Kinetic Schemes. 1. Isothermal Kinetics at Constant Pressure
Topic: Chemistry
Published: 5/20/1999
Authors: Vadim Dmitrievich Knyazev, Wing Tsang
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100711



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