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Displaying 751 - 775 of 2521

Quantum Dot Dissemination and Behavior in Bacterial Biofilms

May 7, 2006
Author(s)
Jayne B. Morrow, Richard D. Holbrook, Cynthia J. Zeissler
… distribution systems. Dots of two different sizes (5 and 20 nm) and two different surface chemistries (amine and … are significantly reduced for larger QDs, -16.6 kT, for 20 nm diameter QDs contacted with drinking water biofilms. …

Fast Setting CPC-Chitosan Composite: Mechanical Properties and Dissolution Rates

March 16, 2006
Author(s)
Limin Sun, Hockin D. Xu, Shozo Takagi, Laurence C. Chow
… Six chitosan mass fractions were tested: 0 %, 10 %, 15 %, 20 %, 25 % and 30 %. Specimens were immersed in solutions … as the fraction of mass loss vs. immersion time from 7 d to 28 d. The CPC-chitosan composite with 20 wt% chitosan had a setting time (mean sd; n = 4) of (13.5 …

Influence of Interface Alloying on the Magnetic Properties of Co/Pd Multilayers

December 1, 2003
Author(s)
J Carrey, A. E. Berkowitz, William F. Egelhoff Jr., D J. Smith
An important issue concerning Co/Pd multilayers is the origin of their perpendicular anisotropy. One explanation is broken symmetry of Co atoms at the Co/Pd interface; another involves magnetoelastic effects in an interfacial Co-Pd alloy. We examined this

Suppression of Cup-Burner Flames

September 17, 2003
Author(s)
F Takahashi, Gregory T. Linteris, V Katta
… CO2 replacing air, (15.9 0.6) %; CF3H replacing air, (11.7 0.8) %; CO2 replacing N2, (40.2 2.0) %; and CF3H replacing N2, (20.3 1.5) %. The cup-burner flame without agent flickered at …

Formation of Macropores in Calcium Phosphate Cements Through the Use of Mannitol Crystals

January 1, 2001
Author(s)
Milenko Markovic, Shozo Takagi, Laurence C. Chow
… were removed from molds 4 h later and placed in water for 20 h causing complete dissolution of the mannitol and … tensile strengths (DTS) were (a) (11.8 1.5) Mpa and (b) (7.6 0.9) Mpa (n - 8). Additional CPC-mannitol samples were … equal to} 660 MPA. The DTS of these samples were (a') (20.6 1.5) Mpa and (b') (13.8 1.2) Mpa (n=3). …

Long Polymerase Chain Reaction (PCR) for Variable Number of Tandem Repeats (VNTR) Analysis

November 1, 1999
Author(s)
Kristy L. Richie, M D. Goldsborough, M M. Darfler, E A. Benzinger, M L. Lovekamp, D J. Reeder, C D. O'Connell
… of long DNA targets from approximately 0.5 kb to > 20 kb of genomic DNA. Currently, several Long PCR systems are … from bloodstains, we have successfully amplified 1-20 ng of Chelex-extracted DNA, and amount commonly used in …

Transition-edge Sensors

July 5, 2022
Author(s)
Douglas Bennett
Near the end of the 20th century, there was renewed excitement about the potential appli- cations of a type of superconducting detector known as the transition-edge sensor (TES). In the intervening decades there has been a paradigm shift from TESs as a

Ohms Law Low-current Calibration System for Ionization Chambers

August 24, 2020
Author(s)
Dean G. Jarrett, Shamith U. Payagala, Ryan P. Fitzgerald, Denis E. Bergeron, Jeffrey T. Cessna, Charles J. Waduwarage Perera, Neil M. Zimmerman
… source to generate calibration currents from 1 pA to 20 nA, traceable to quantum voltage and resistance standards …

RF waveform synthesizers with quantum-based voltage accuracy for communications metrology

February 11, 2019
Author(s)
Peter F. Hopkins, Justus A. Brevik, Manuel C. Castellanos Beltran, Nathan E. Flowers-Jacobs, Anna E. Fox, David I. Olaya, Christine A. Donnelly, Paul D. Dresselhaus, Samuel P. Benz
… span the entire radio frequency (RF) band, equivalent to 7 orders of magnitude in frequency (20 kHz - 300 GHz). To synthesize waveforms in the microwave …
Displaying 751 - 775 of 2521
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