排序方式: 共有27条查询结果,搜索用时 15 毫秒
1.
A study of microstrip array antennas with the feed network 总被引:2,自引:0,他引:2
Levine E. Malamud G. Shtrikman S. Treves D. 《Antennas and Propagation, IEEE Transactions on》1989,37(4):426-434
The radiation and losses in microstrip antennas with a corporate feed network are studied. A surface current approach is applied in which the electrical currents in the feed lines are modeled as in ideal transmission lines. The free-space radiation and the surface-wave excitation of typical segments in printed feed networks are studied. A four-element array antenna with its printed feed network is analyzed and predicted radiation patterns, directivity, and gain are presented and compared with experimental results. The gain and directivity of large arrays of 16, 64, 256 and 1024 elements are calculated and measurements in the frequency range of 10 to 35 GHz are reported 相似文献
2.
Thermosiphon-based PCR reactor: experiment and modeling 总被引:2,自引:0,他引:2
A self-actuated, flow-cycling polymerase chain reaction (PCR) reactor that takes advantage of buoyancy forces to continuously circulate reagents in a closed loop through various thermal zones has been constructed, tested, and modeled. The heating required for the PCR is advantageously used to induce fluid motion without the need for a pump. Flow velocities on the order of millimeters per second are readily attainable. In our preliminary prototype, we measured a cross-sectionally averaged velocity of 2.5 mm/s and a cycle time of 104 s. The flow velocity is nearly independent of the loop's length, making the device readily scalable. Successful amplifications of 700- and 305-bp fragments of Bacillus cereus genomic DNA have been demonstrated. Since the device does not require any moving parts, it is particularly suitable for miniature systems. 相似文献
3.
4.
R Gomez L Dauwe H Haggerty E Malamud M Nikolic S Hagopian A Pifer R Abrams J Ares H Goldberg C Halliwell S Margulies D McLeod A Salminen J Solomon G Wu S Blessing R Crittenden P Draper A Dzierba R Heinz J Krider T Marshall J Martin A Sambamurti P Smith A Snyder C Stewart T Sulanke A Zieminski R Ellsworth J Goodman S Gupta G Yodh T Watts V Abramov Y Antipov B Baldin S Denisov V Glebov Y Gorin V Kryshkin A Petrukhin S Polovnikov R Sulyaev 《Canadian Metallurgical Quarterly》1987,35(9):2736-2746
5.
A. N. Spector Lay James Gibson Ashok K. Dutt William F. Hyde Paul B. Sherman Hans-Jurg Buttler Bernard Malamud Robert N. Anderson M. Penouil R. W. Keyes Lee R. McPheters William R. Eadington Kurt Puchinger Arthur E. Kartman Charles E. Starnes J. Barry Riddell Erick Sheppard Leon E. Zonn Craig Moore Neil S. Grigg K. Shimizu Daniel A. Griffith Noel D. Uri Micheal Ross Jack E. Adams Robert G. Fletcher Karol J. Krotki Peter D. Beaulieu Fred E. Case W. Edwin Derrick Barry D. Solomon Debnath Mookherjee John E. Keith Yuk Lee Andrew A. Dzurik W. W. Hall Jr. Lloyd W. Klemke Ted J. Adamczyk 《The Annals of Regional Science》1981,15(3):82-146
6.
Incubation of HIV with human whole, parotid, or submandibular saliva leads to a decrease in viral infectivity in Sup-T1 cells. The effect is most pronounced with submandibular saliva. Inhibition is seen within 2 min, and increases with time. There is little inhibition seen after incubation of saliva with HSV, and no effect with adenovirus, suggested that there is some viral specificity. Electron microscopic studies revealed that HIV-saliva aggregates are trapped in 0.45-microns pore size nitrocellulose filters. If these inhibitory effects are manifest in vivo, this could account for the low level of virus detected in oral secretions. 相似文献
7.
8.
9.
Marc Termote H. St. Seidenfus Ruth Shen Dale R. Schmeichel R. Keith Semple Lay James Gibson Ryszard Domanski Michael F. Sheehan Josephine Olu Abiodun A. M. Fuller Turgut Var Diane J. Martz Douglas M. Brown Peter Cowan James L. Mulvihill Tom Rijerkerk Konrad Dramowicz Roger F. Riefler C. J. Robertson Bernard Malamud Rudolf Andorka James L. LeBeau J. C. Stabler Wilbur R. Maki Jan S. Kowalski Nigel Thrift Richard W. Lichty Dr. Andre Simmons Raimund K. Herz Donald Jones Kurt Puchinger J. Barry Riddell R. Ross MacKay Noel D. Uri Peter Boothroyd John F. Jakubs Peter M. Schulze P. N. Mathur 《The Annals of Regional Science》1985,19(2):100-157
10.
MK Howett EB Neely ND Christensen B Wigdahl FC Krebs D Malamud SD Patrick MD Pickel PA Welsh CA Reed MG Ward LR Budgeon JW Kreider 《Canadian Metallurgical Quarterly》1999,43(2):314-321
Sodium dodecyl sulfate (SDS), an alkyl sulfate surfactant derived from an organic alcohol, possesses surfactant properties but also denatures and unfolds both monomeric and subunit proteins. In preliminary experiments, we demonstrated that SDS is a potent inactivator of herpes simplex virus type 2 and human immunodeficiency virus type 1 at concentrations comparable to those used for the surfactant nonoxynol-9. We hypothesized that SDS might be capable of denaturing the capsid proteins of nonenveloped viruses. In this report, we demonstrate inactivation of rabbit, bovine, and human papillomaviruses after brief treatment with dilute solutions of SDS. Effective concentrations were nontoxic to rabbit skin and to split-thickness grafts of human foreskin epithelium. This is the first report of a microbicidal surfactant that will inactivate papillomaviruses. We propose that SDS is now a candidate microbicide for formulation and testing with humans. 相似文献