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Displaying 2151 - 2175 of 2289

RAPID INSPECTION OF CARBON NANOTUBE QUALITY

July 1, 2007
Author(s)
Stephanie A. Hooker, Roy H. Geiss, Aparna Kar
Carbon nanotubes have unique properties of interest for applications in aerospace, electronics, and biotechnology. However, the properties of different batches of carbon nanotubes can vary considerably depending on chemical purity and the nanotube types

Supression Characteristics of Cup-Burner Flames in Low Gravity

January 1, 2004
Author(s)
F Takahashi, Gregory T. Linteris, V Katta
The structure and suppression of laminar methane air co-flow diffusion flames formed on a cup burner have been studied experimentally and numerically using physically acting fire-extinguishing agents (CO2, N2, He, and Ar) in normal earth (1g) and zero

Quantum Efficiency of Spectral UV on Polyurethanes

March 1, 2002
Author(s)
Tinh Nguyen, Jonathan W. Martin, E Byrd, E Embree
Polyurethanes (PU) are used extensively as exterior building materials. However, PU undergoes degration during outdoor exposure. The quantum efficiency of spectral UV on photodegration of an acrylic-urethane coating has been investigated. Samples of

Benzocycloarene Hydroxylation by P450 Biocatalysis

January 1, 2002
Author(s)
M P. Mayhew, A. E. Roitberg, Yadu D. Tewari, Marcia J. Holden, David J. Vanderah, V L. Vilker
Experimental and theorectical studies of the hydroxylation of a family of benzocycloarene compounds (benzocyclobutene, benzocyclopentene (indan), benzocyclohexene (tetralin), and benzocycloheptene) by wild type P450cam and mutant Y96F P450cam were

Silicon Single Atom Steps as AFM Height Standards

August 1, 2001
Author(s)
Ronald G. Dixson, Ndubuisi G. Orji, Joseph Fu, V W. Tsai, E. C. Williams, Theodore V. Vorburger, H Edwards, D Cook, P West, R Nyffenegger
… of silicon single atomic steps on Si (111) (with native oxide) using the C-AFM. The value we obtained was 304 +/- 8 …

Copper-Catalyzed Radiolytic Reduction of CO 2 to CO in Aqueous Solutions

May 1, 2001
Author(s)
J Grodkowski, Pedatsur Neta
Radiolysis of aqueous solutions containing CO 2 and Cu(II) ions under reducing conditions leads first to reduction of the Cu(II) and then to formation of CO. Experiments under various conditions show that although Cu(II) was often reduced to colloidal Cu(0

Extinction of Nonpremixed Flames With Halogenated Fire Suppressants

July 31, 1994
Author(s)
Anthony P. Hamins, D Trees, K Seshadri, H K. Chelliah
An experimental, analytical, and numerical study was performed to elucidate the influence of eleven gaseous agents, considered to be substitutes for CF3Br, on the structure and critical conditions of extinction of diffusion flames burning liquid

Speciating volatile organic compounds in indoor air: using in-situ GC to interpret real-time PTR-MS signals

December 18, 2024
Author(s)
Jenna Ditto, Han Huynh, Jie Yu, Michael Link, Dustin Poppendieck, Megan Claflin, Marina Vance, Delphine Farmer, Arthur Chan, Jonathan Abbatt
Proton transfer reaction mass spectrometry (PTR-MS) is often employed to characterize gas-phase compounds in both indoor and outdoor environments. PTR-MS measurements are usually made without upstream chromatographic separation, so it can be challenging to
Displaying 2151 - 2175 of 2289
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