Abstract:
Ultraviolet light absorbing, polymerizable phenothiazine and azaphenothiazine monomers, copolymers thereof and articles of manufacture, including lenses, optical devices, plastic films and hydrogels, constructed therefrom.
Abstract:
A composition and surgical method involving the use as an ophthalmic viscoelastic surgical material of an aqueous solution containing at least 1.5 %, by weight, of a water soluble polyvinylpyrrolidone or polyvinylpyrrolidone copolymer having a molecular weight greater than 500,000 and a viscosity greater than 5,000 centipoises.
Abstract:
A composition and method for treating hypertension, cardiac or renal hypertrophy, polydipsia, polyuria, stroke or atherosclerosis based on chronic administration of L-tryptophan or L-5-hydroxytryptophan.
Abstract:
A device for the transport of large conduction heat flux between two locations of differing temperature includes a pair of fluid reservoirs (12, 14) for positioning at the respective locations connected by at least one duct (24), and preferably a plurality of ducts (24), having walls of a material which conducts heat. A heat transfer fluid, preferably a liquid, and preferably a liquid metal such as mercury, lithium or sodium, fills both reservoirs and the connecting ducts. An oscillatory axial movement or flow of working fluid is established within the ducts, with the extent of fluid movement being less than the duct length. Preferably the oscillatory movement is sinusoidal. Heat is transferred radially between the fluid and the duct walls and thence axially along the ducts. The rate of heat transfer is greatly enhanced by a physical mechanism which may be described as a high time-dependent radial temperature gradient produced by fluid oscillations. During most of each sinusoidal cycle, fluid in wall-near region has a temperature different from the core of the fluid column, with most of the temperature difference concentrated across a relatively thin boundary layer.
Abstract:
A dihydropyridine pyridinium salt type of redox, or chemical, delivery system for the site-specific and/or site-enhanced delivery of a radio-nuclide to the brain. A chelating agent capable of chelating with a radionuclide and having a primary, secondary or tertiary amino function can be converted to the corresponding analogue in which said function is replaced with a dihydropyridine pyridinium salt redox system and then complexed with a radionuclide to provide a new radiopharmaceutical that, in its lipoidal dihydropyridine form, penetrates the blood-brain barrier ("BBB") and allows increased levels of radionuclide concentration in the brain, particularly since oxidation of the dihydropyridine moiety in vivo to the ionic pyridinium salt retards elimination from the brain while elimination from the general circulation is accelerated. This radionuclide delivery system is well suited for use in scintigraphy and similar radiographic techniques.
Abstract:
Improved medical devices and instruments prepared by an improved method of producing hydrophilic, gamma-irradiation induced polymerized and chemically grafted coatings on plastic surfaces of articles adapted for contacting living tissue, the improvement comprising carrying out the graft polymerization in an aqueous solution under specific combinations of the following conditions: (a) monomer concentration in the range of from about 0.1 % to about 50 %, by weight; (b) total gamma dose in the range of from about 0.001 to less than about 0.50 Mrad; and (c) gamma dose rate in the range of from above about 2,500 to about 10 rads/minute.
Abstract:
The subject invention provides devices and methods for efficiently and accurately gathering image and other field data using a handheld portable Geographic Data Manager (GDMs). The subject GDMs can utilize a combination of GPS antennas and receivers, digital compasses, inclinometers, gyroscopes, and digital cameras to gather, process, and/or store data which can provide the position and other geographic data and information pertaining to objects of study. The subject GDMs can have application to fields including environmental sampling, surveying, agriculture field data collection, property appraisal, law enforcement, and construction inspection.
Abstract:
The subject invention pertains to novel variants of the maize gene, Shrunken2(Sh2) and a method of using that gene. The variant gene, Sh2-m1Rev6, encodes a subunit of the ADP-glucose pyrophosphorylase (AGP) enzyme that has additional amino acids inserted in or near the allosteric binding site of the protein. Corn seed expressing the Sh2-m1Rev6 gene has a 15 % weight increase over wild type seed. The increase in seed weight is not associated simply with an increase in percentage starch content of the seed.
Abstract:
A method and structure for a photo-active region (20) for generation of free carriers when a first surface is exposed to optical radiation. The photo-active region (20) includes a conducting transparent matrix (24) and clusters (22, 26, 28, 30) of semiconductor materials embedded within the conducting transparent matrix (24). The clusters are arranged in the matrix material so as to define at least a first distribution of cluster sizes ranging from those with the highest bandgap energy near a light incident surface of the photo-active region to those with the smallest bandgap energy near an opposite second surface of the photo-active region. Also disclosed is a method and structure for a solar cell. The solar cell includes a photo-active region (20) containing a plurality of semiconductor clusters (22, 26, 28, 30) of varying sizes as described.
Abstract:
Acquired hypoparathyroidism (AH) occurs frequently as a component of type I autoimmune polyglandular diseases (APS-I) or as a sporadic isolated disease in adults. Whereas autoantibodies to the parathyroid glands have been reported in AH, their very existence remains controversial. We report here the detection of autoantibodies as identified through immunoblotting using sera from AH patients. The antibodies were specific to parathyroid autoantigens obtained through differential centrifugation of fresh human hypercellular parathyroid glands, obtained shortly after their surgical removal for tertiary hyperparathyroidism in patients with renal failure. Autoantibodies were detected against several parathyroid specific proteins in the 17 AH sera tested. Twelve (70 %) reacted to a protein of 70 kDa, while 16 (94 %) reacted to a protein of 80 kDa, and 3 (18 %) reacted to a protein of 120-140 kDa, respectively. The 70 and 80 kDa proteins were localized to the cytosolic fraction of the parathyroid extract, and the 120-140 kDa protein to the membrane fraction. The autoantibodies were also detectable using a dog parathyroid gland as an antigen source. However, they could not be identified using cultured human melanocytes or in rat pituitary cells as antigen sources. Sera from 50 patients with various other autoimmune diseases as well as 22 normal controls were also tested, and none reacted with any of the above specific parathyroid proteins. It is concluded that autoantibodies to 3 major autoantigens in the human parathyroid gland extract have been detected in AH patients. Furthermore, our data indicates that the 120-140 kDa autoantigen is the calcium sensing receptor and that the reactive epitope largely resides in its extracellular domain. These data confirm the autoimmune nature of AH, and the invention provides a method for detecting AH or propensity for AH as well as a method for treating AH.