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Topic Area: Bioscience
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Displaying records 271 to 280 of 416 records.
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271. DNA Base Damage by the Antitumor Agent 3-Amino-1,2,4-Benzotriazine 1,4-Dioxide (Tirapazamine)
Topic: Bioscience & Health
Published: 9/24/2003
Authors: M Birincioglu, Pawel Jaruga, G Chowdhury, H Rodriguez, M Miral Dizdar, K Gates
Abstract: Tirapazamine is a bioreductively activated DNA-damaging agent that selectively kills the hypoxic cells found in solid tomors. This compound shows great clinical promise and is currently being examined in a variety of clinical trails, including sever ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830363

272. Interdiffision in Polystyrene and End-Functional Polystyrene Thin Films Near a Solid Surface
Topic: Bioscience & Health
Published: 9/10/2003
Authors: Chengqing C. Wang, Vivek M Prabhu, Christopher L Soles, B D. Vogt, Wen-Li Wu, Eric K Lin, Sushil K Satija
Abstract: Polymer interdiffusion near the polymer/solid interface is studied using neutron reflectometry. Bilayers of hydrogenated polystyrene (hPS) and deuterated polystyrene (dPS) or hydrogenated dicarboxy terminated polystyrene (hPS(COOH)2) and dPS are prep ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852188

273. The Development of Reduced Size STR Amplicons as Tools for Analysis of Degraded DNA
Topic: Bioscience & Health
Published: 9/1/2003
Authors: John M Butler, Y Shen, B. R. McCord
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903141

274. Renewable Standard Reference Materials for the Detection of TP53 Mutations
Topic: Bioscience & Health
Published: 8/1/2003
Authors: C D O'Connell, L A. Tully, J M Devaney, M Marino, J P. Jakupciak, Donald H Atha
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903167

275. A Superconducting Microwave Power Limiter for Protection of High-Performance Superconducting Electronics
Topic: Bioscience & Health
Published: 7/11/2003
Authors: James C Booth, Kenneth Leong, Susan Schima
Abstract: We report on the development of a microwave power limiter based on high temperature superconductor technology. The power limiter takes the form of a 50 Ω coplanar waveguide transmission line that can be reversibly driven into the normal state as ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31362

276. Kinetic Inductance Contributions to the Nonlinear Response of Superconductors at Microwave Frequencies
Topic: Bioscience & Health
Published: 7/11/2003
Authors: James C Booth, Kenneth Leong, Susan Schima
Abstract: We demonstrate how nonlinear effects in high temperature superconducting thin films can be quantified based on a current-dependent penetration depth {lambda}(J). Using an assumed form for {lambda}(J), we calculate the expected third-order harmonic si ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31363

277. A Self-Attenuating Superconducting Transmission Line for Use as a Microwave Power Limiter
Topic: Bioscience & Health
Published: 6/1/2003
Authors: James C Booth, David A Rudman, Ronald H. Ono
Abstract: We have designed, fabricated, and tested a microwave power limiter based on high temperature superconductor thin film technology. The signal limiter takes the form of a 50 {Ohm} coplanar waveguide transmission line that is reversibly driven from the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30581

278. Description of the Nonlinear Behavior of Superconductors Using a Complex Conductivity
Topic: Bioscience & Health
Published: 6/1/2003
Authors: James C Booth, Susan Schima, Donald C. DeGroot
Abstract: The origin of the detrimental nonlinear response in the high Tc superconductor (HTS) microwave devices is currently not well understood. In order to help elucidate the origin of these nonlinear effects, we have performed phase-sensitive measurements ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30580

279. Influence of Impedance Mismatch Effects on Measurements of Unloaded Q Factors of Transmission Mode Dielectric Resonators
Topic: Bioscience & Health
Published: 6/1/2003
Authors: Kenneth Leong, James C Booth, Sang Yo Lee
Abstract: Precise measurements of the surface resistance of high temperature superconducting thin films using transmission mode dielectric resonators requires accurate knowledge of the unloaded Q factor. So far, the most accurate method of unloaded Q factor de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30577

280. Microwave Surface Impedance and Nonlinear Properties of MgB^d2^ Films
Topic: Bioscience & Health
Published: 6/1/2003
Authors: James C Booth, Sang Yo Lee, Kenneth Leong, J. H. Lee, J. Lim, H. N. Lee, S. H. Moon, B. Oh
Abstract: We have measured the temperature dependence of the microwave surface impedance and the nonlinear response of high-quality MgB^d2^ films on c-cut sapphire at temperatures below 40 K. MgB^d2^ films with surface resistance (Rs) as low as 0.09 m{Ohm} at ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30582



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