Disclosed are compositions including a film enriched with a radioisotope relative to its natural abundance, wherein the film has a thickness of one to ten atomic or molecular layers, decay of the radioisotope comprises emission of electrons, and a majority of the emitted electrons have an energy less than or equal to 700 electron volts (ev). Also disclosed are methods for making the compositions. The compositions can be used in microarrays, nanoarrays, microparticles, nanoparticles, power sources, sensing devices, and medical devices; they may also be used in a method of delivering low-energy electrons to a liquid, solid, molecular layer, or cell.

The compositions of the present invention comprise at least one medium polarity oil and at least one antibacterial agent, the combination of which produces a synergistic antibacterial effect against bacterial biofilms. Methods are disclosed for the reduction of bacteria in and/or elimination of bacterial biofilms on biological and non-biological surfaces, as well as methods for the treatment of wounds, skin lesions, mucous membrane lesions, and other biological surfaces infected or contaminated with bacterial biofilms.

The present invention relates to a nanoparticle, a preparation method thereof, a stone removing device and its application. The nanoparticle includes a nanoparticle core made of a magnetic material, and a nanoparticle shell formed by attaching a surface modifier monomer to the nanoparticle core with an initiator and/or a crosslinking agent. The prepared nanoparticle can surround stones in ureter, and then small stone remaining in body can be removed quickly without damage from the body under the action of an externally applied magnetic field, that is, the stone can be drawn and moved without injuring ureteral wall, and meanwhile the nanoparticles are placed conveniently without shift.

The purpose of the present invention is to provide a viscoelastic composition having excellent operability, which is suitable for use in securing the field of view of an endoscope when opaque dark-colored liquid accumulates inside a canal and obstructs the field of view of the endoscope, the viscoelastic composition securing the field of view by pushing the liquid aside, and to provide a method for securing the field of view of an endoscope using the viscoelastic composition. The viscoelastic composition for securing the field of view of an endoscope comprises a substance having viscoelastic properties and water, preferably has a hardness of 550 N/m.sup.2 or less, a viscosity (25? C.) of 200 to 2,000 mPa.Math.s, and a loss tangent of 0.6 or less, and more preferably has an electrical conductivity of 250 ?S/cm or less. The method for securing the field of view of an endoscope comprises feeding the viscoelastic composition from a proximal part of the endoscope, through a channel, into a distal part of the endoscope.

The present invention relates to nanoparticles, a preparation method thereof, a stone removal device, a magnetic target separation instrument and its application. The nanoparticles include a nanoparticle core made of magnetic materials, and a nanoparticle shell formed by attaching surface modifier monomers to the nanoparticle core with an initiator and/or a crosslinking agent. The prepared nanoparticles can wrap stones in ureter, and then small stones remaining in body can be removed quickly without damage from the body under the action of the magnetic target separation instrument. The stones can be drawn and moved without injuring ureteral wall, and meanwhile be disposed conveniently without easy shift.

A wearable device is described. The wearable device includes a housing having a back cover, and an optical mask on first portions of the back cover. The back cover includes a set of windows, with a first subset of windows in the set of windows being defined by an absence of the optical mask on second portions of the back cover, and a second subset of windows in the set of windows being inset in a set of openings in the back cover. An optical barrier surrounds each window in the second subset of windows. A set of light emitters is configured to emit light through at least some of the windows in the set of windows. A set of light detectors is configured to receive light through at least some of the windows in the set of windows.

Provided is a ureteral stent comprising certain amount of ethylene-vinyl acetate polymer and a certain amount of an additive selected from barium sulfate, bismuth subcarbonate, bismuth oxychloride, a polyolefin elastomer, a thermoplastics elastomer, and a mixture thereof. The provided stent may have multiple layers such as inner layer and outer layer with each layer having different elastic modulus. Also provided is a method of making the aforementioned ureteral stent and a method of using the ureteral stent in treating kidney or bladder related diseases.

The invention relates to a method of a magnetic material in stone removal, nanoparticles, a preparation method thereof and a stone removing device. Wherein, the magnetic material constitutes a nanoparticle core and a surface modifier monomer is attached to the nanoparticle core by an initiator and/or a crosslinking agent to form a nanoparticle shell. The prepared nanoparticles can surround stones in ureter, thereby, small stones remaining in body can be removed quickly without damage from the body under action of external magnetic field, that is, the stone can be drawn and moved without injuring ureteral wall, and the nanoparticles are placed conveniently without shift.

A heterogeneous patient-based breast phantom that mimics the anatomy and properties of real breast tissues when screened with ionizing and nonionizing imaging modalities is described. The heterogeneous breast phantom includes a skin mimicking segment; an adipose tissue mimicking segment; a fibro-glandular tissue mimicking segment; and a pectoral muscle mimicking segment wherein each segment is shaped and arranged such that the breast phantom represents a breast tissue. Performance of the breast phantom was characterized by mass attenuation coefficient, electron density and effective atomic number. Further, performance of breast phantoms was confirmed CT and breast MRI machines.

A composition for an acoustic wave probe, containing the following ingredients (A) to (D): (A) a linear polysiloxane having a vinyl group; (B) a linear polysiloxane having two or more SiH groups in a molecular chain; (C) a polysiloxane resin; and (D) surface-treated silica particles having an average primary particle diameter more than 16 nm and less than 100 nm, as well as, a silicone resin for an acoustic wave probe, an acoustic wave probe, an ultrasound probe, an acoustic wave measurement apparatus, an ultrasound diagnostic apparatus, a photoacoustic wave measurement apparatus, and an ultrasound endoscope, using the composition for an acoustic wave probe.