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Ultra-wideband (UWB) electromagnetic pulses of nanosecond duration, or nanopulses, are of considerable interest to the communications industry and are being explored for various applications in biotechnology and medicine. The propagation of a nanopulse through biological matter has been computed using the finite difference-time domain (FDTD) method. The… (More)
The traction force produced by biological cells has been visualized as distortions in flexible substrata. We have utilized quantitative phase microscopy by digital holography (DH-QPM) to study the wrinkling of a silicone rubber film by motile fibroblasts. Surface deformation and the cellular traction force have been measured from phase profiles in a direct… (More)
Physical properties of poly(L-ornithine) (PLO), a polycation, poly(L-glutamic acid 4-co-L-tyrosine) (PLEY), a polyanion, and electrospun fibers made of these polymers have been determined and compared. The polymers adopted random coil-like conformations in aqueous feedstocks at neutral pH and in dehydrated cast films and fibers on glass, and the fibers… (More)
1,6-Hexanedithiol monolayer acts as an unusually specific recognition agent for CH3Hg+ when the microcantilever is used as the transducer; the mechanism of the sensor is discussed.
And the Award goes to… For many, nanotechnology seems far removed from biology. There is none the less a sense in which nanotechnology was born of medicine. Simone Signoret was an actress of striking appearance and ability. The eldest daughter of a French-born Jewish army offi cer and linguist who would later work in the United Nations. She was raised in… (More)
Three-dimensional profiling and tracking by digital holography microscopy (DHM) provide label-free and quantitative analysis of the characteristics and dynamic processes of objects, since DHM can record real-time data for microscale objects and produce a single hologram containing all the information about their three-dimensional structures. Here, we have… (More)