Now showing items 21-26 of 26
Water sample viral contamination detection system
(United States Patent and Trademark Office, 1996-06-18)
Viral contamination in water samples is detected using a medium which includes both a substrate for .beta.-galactosidase and E. coli with elevated levels of intracellular .beta.-galactosidase. The substrate is chosen to ...
Fine powders of ketone-containing aromatic polymers and process of manufacture
(United States Patent and Trademark Office, 1994-10-18)
Fine particles of semi-crystalline ketone-containing aromatic polymers (PEEK, PEKK, etc.) are produced by controlling the rate and conditions of hydrolysis of an amorphous polyarylketimine intermediate. The choice of acid ...
Elastic-part immersion cell for analyzing microstructures in materials
(United States Patent and Trademark Office, 1995-06-06)
The elastic-port immersion cell (10) is an optical oil immersion vessel which has a flexible latex (or other) sheath (24) protruding from its sidewall. The sheath is affixed to an opening in the wall of the vessel using a ...
Sol-gel .beta.-aluminum titanate thin film coating
(United States Patent and Trademark Office, 1995-04-18)
.beta.-Al.sub.2 TiO.sub.5 protective coatings have been developed for both dense and porous ceramics such as SiC and Si.sub.3 N.sub.4 using a chemical solution processing method involving the hydrolysis and condensation ...
Spatially-weighted two-mode optical fiber sensors
(United States Patent and Trademark Office, 1993-06-29)
Tapered two-mode optic fibers are used as sensors with sensitivity varying as a function of length. The optical fiber sensors act as vibrational-mode filters thereby performing initial signal processing of the sensor signal. ...
Chemical modification of shaped hydrogels in non-aqueous medium
(United States Patent and Trademark Office, 1996-06-25)
A method is described for the chemical modification of pre-shaped hydrogels in non-aqueous medium. The conditions permit the reaction of highly expanded, porous hydrogel particles, such as spherical beads, using pseudo ...