Abstract:
An interferometric measurement scheme utilizing squeezed light wherein an input pulse is split (14) into two consecutive input pulses (15a, 15b) separated by a time interval that is less than the inverse spectral width of GAWBS. The two pulses are further split (16) into first (20a, 20b) and second (22a, 22b) pairs of pulses and are caused to propagate in opposite directions through a fiber optic interferometer loop (18) and are recombined upon exiting the loop (16). The recombined pulses are caused to pass through a (pi) phase modulator (38) which modulates one of the two pulses. The output is then introduced to a balanced detector (50) where the detected signal of the two is averaged such that GAWBS noise is cancelled.
Abstract:
Described herein are genes shown to be essential for programmed cell death in C. elegans, their encoded products (RNA and polypeptides), antibodies directed against the encoded polypeptides; probes for identifying structurally related genes and bioassays for identifying functionally related cell death genes from various organisms; methods and agents for altering (increasing or decreasing) the activity of the cell death genes and, thus, of altering cell death; and uses therefor. Specifically, two genes shown to be essential for almost all of the cell deaths which occur in the development of C. elegans, referred to as ced-3 and ced-4, have been cloned, sequenced and characterized.
Abstract:
This invention pertains to a method for immobilizing polyethylene oxide (PEO) star molecules in the form of hydrogel layers. The PEO star molecules are biocompatible and demonstrate non-thrombogenic properties. As such, the PEO star molecule layers have numerous biomedical applications, such as on contact lenses. The hydrogel layers contain a high percentage of terminal hydroxyl groups for attachment of affinity ligands and can be used for separating and purifying therapeutic proteins.
Abstract:
An ultrasound hyperthermia applicator suitable for medical hyperthermia treatment, and method for using the same, includes two ultrasound sources (14, 16) producing focused ultrasound beams of frequencies f0 and f1. Aiming means direct the two ultrasound beams (20, 22) so that they cross each other confocally at the target. A controller (11) activates the two ultrasound sources so that the target is simultaneously irradiated by the two focused ultrasound beams. The two ultrasound sources provide acoustic energy sufficient to cause significant intermodulation products to be produced at the target due to the interaction of the two ultrasound beams. The intermodulation products are absorbed by the target to enhance heating of the target. In preferred embodiments the ultrasound sources include a pair of signal generators (34, 36) for producing gated ultrasound output signals driving single crystal ultrasound transducers (14, 16). In other embodiments the ultrasound sources include a pair of phased array ultrasound transducers for generating two steerable ultrasound beams. Aiming means are provided for electronically steering and focusing the two ultrasound beams so that they cross each other confocally at the target. Further embodiments employ pluralities of transducers, arrays, or both.
Abstract:
A process and apparatus for improving metal production in ironmaking and steelmaking processes is disclosed. The use of an inert metallic conductor in the slag-containing crucible and the addition of a transition metal oxide to the slag are the disclosed process improvements. The process comprises electric discharging of an electric charge build up in the slag.
Abstract:
A method by which a nucleotide sequence, specifically a CTG triplet repeat, shown to be expanded in individuals affected with DM can be identified in a sample obtained from an individual. The present method can be used to identify individuals in whom the CTG triplet repeat is present in normal copy number and individuals in whom the CTG triplet repeat occurs in abnormally high copy number, as well as to further identify individuals likely to be minimally affected and individuals likely to be more severely affected. The work described herein also makes available a DM transcription unit or gene which is likely to have an important role in the pathophysiology of DM.
Abstract:
A semiconductor laser gain structure having a tapered gain region (31) comprising cavity spoilers (48, 50) for receiving light which is reflected off of the output facet (38) back into the semiconductor and removing it from the gain region (31) so as to reduce or eliminate self-oscillation. The boundaries of the gain region (31) are also designed to have a very low refractive index gradient so as to minimize reflection of light off of the boundaries back into the gain region (31). The gain structure (33) may be embodied in a semiconductor laser oscillator or semiconductor laser amplifier depending on whether the input facet (34) is or is not, respectively, anti-reflection coated. The output facet (38) is anti-reflection coated in either embodiment.
Abstract:
The disclosure relates to a generic class of ubiquitin-specific proteases which specifically cleave at the C-terminus of the ubiquitin moiety in a ubiquitin fusion protein irrespective of the size of the ubiquitin fusion protein. More specifically, the disclosure relates to ubiquitin-specific proteases of this class which have been isolated from a cell. The disclosure also relates to isolated DNA sequences encoding the proteases of this class.
Abstract:
Mutagenesis of the gene encoding homoserine dehydrogenase (hom) for production of the amino acid threonine is described. The mutation causes an alteration in the carboxy terminus of the enzyme that interferes with end-product inhibition by threonine. The lack of end-product inhibition causes an overproduction of threonine.
Abstract:
The cloning of the heparinase gene from Flavobacterium Heparinum using the polymerase chain reaction is described. The Open Reading Frame (ORF) corresponded to 1152 base pairs encoding a precursor protein of MW 43,800 daltons. The amino acid sequence reveals a 20-residue leader peptide. The gene was expressed in two expression systems in E. Coli.