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Topic Area: Chemistry

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911. 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

912. 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

913. 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

914. 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

915. 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

916. 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

917. 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

918. 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

919. Comparison of Zeeman Background Corrected Atomic Absorption Spectrometric and Inductively Coupled Plasma Mass Spectrometric Detection of Trace Elements in Electrothermally Vaporized Serum
Topic: Chemistry
Published: 5/1/1999
Authors: A K Skipor, J J Jacobs, Lee Lijian Yu, J Black
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100825

920. Development of a Triplasmatron Ion Source for the Generation of SF^d5^+ and F- Primary Ion Beams on an Ion Microscope Secondary Ion Mass Spectrometry Instrument
Topic: Chemistry
Published: 5/1/1999
Authors: John G Gillen, R Lance King, F Chmara
Abstract: A hot filament duoplasmatron ion source operating with argon has been modified by addition of an enclosed expansion cup mounted to the extraction side of the duoplasmatron anode. Using sulfur hexafluoride (SF^d6^) as a feed gas, this triplasmatron i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831074



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