A laser system in which the laser medium is a single crystal of Cr.sub.3+ :Mg.sub.2 SiO.sub.4 is disclosed. In one embodiment, the system comprises a single crystal of chromium doped forsterite and a cavity which includes a pair of 30 cm. radius mirror having high transmission at 543 nm (the pump wavelength) and high reflectivity in the 1150-1350 nm range. Room temperature vibronic pulsed laser action is obtained with this cavity. Laser action has been observed at 1235 nm and a bandwidth of 25 nm. The wavelength range is suitable for transmission through optical fibers and is useful in laser ranging and remote sensing. Because of the ultrawide fluorescence bandwidth and a 15 fluoroescence lifetime the system is suitable for high intensity, tunable, cw, Q switched mode locked operation. In the mode locked operation pulses as short as 10-500 femtosecond may be generated. A number of different embodiments of the invention are described.

Chromium-doped foresterite laser system

The present invention relates to a denture adhesive composition comprising mixed salts of an alkyl vinyl ether-maleic acid copolymer wherein the mixed salt contains a cationic salt function comprising from about 5% to about 50% zinc cations; from 0% to about 2.5% of a cation selected from the group consisting of iron, boron, aluminum, vanadium, chromium, manganese, nickel, copper, yttrium, titanium, and mixtures thereof; from about 30% to about 60% free acid component; an effective adhesive amount of magnesium cations; and an effective adhesive amount of a cation selected from the group consisting of calcium, strontium, and mixtures thereof; wherein the total level of magnesium, calcium and strontium is from about 5% to about 65%. In addition the present invention relates to denture adhesive compositions comprising the above composition and at least one non-adhesive self-supporting layer. The present invention further relates to a method of increasing the adhesion of dentures to the oral cavity by applying the above compositions to dentures, directly to the oral cavity, palate or ridge of the oral cavity, or applying it to both, and thereafter securing the dentures to the ridge or palate of the oral cavity.

The Procter &amp; Gamble Company

Denture adhesives with mixed salt copolymers of terpolymers

The present invention relates to a denture adhesive composition comprising mixed salts of an alkyl vinyl ether-maleic acid or anhydride copolymer and/or terpolymer with isobutylene wherein the mixed salt contains a cationic salt function comprising at least about 1% strontium cations, from about 1% to about 40% of zinc cations, from 0% to about 2.5% of a cation selected from the group consisting of iron, boron, aluminum, vanadium, chromium, manganese, nickel, copper, yttrium, titanium, and mixtures thereof; from about 36% to about 60% free acid component; and from 0% to about 65% of a cation selected from the group consisting of magnesium, calcium, and mixtures thereof. In addition, the present invention relates to denture adhesive compositions comprising the above composition and at least one non-adhesive self-supporting layer. The present invention further relates to a method of increasing the adhesion of dentures to the oral cavity by applying the above compositions to dentures, directly to the oral cavity, palate or ridge of the oral cavity, or applying it to both, and thereafter securing the dentures to the ridge or palate of the oral cavity.

Denture adhesive compositions

The method of the production of a nanoparticle of the present invention includes a step of forming a nanoparticle including a compound of ametal ion in a cavity part of aprotein, in a solution containing the protein having the cavity part therein, the metal ion, and a carbonate ion and/or a hydrogen carbonate ion. Examples of the aforementioned compound include e.g., a hydroxide. The aforementioned metal ion is preferably any one of a nickel ion (Ni.sup.2+), a chromium ion (Cr.sup.2+) or a copper ion (Cu.sup.2+). According to the aforementioned method, nanoparticles having a uniform particle diameter can be produced.

Matsushita Electric Industrial Co., Ltd.

Method of production of nanoparticle and nanoparticle produced by the method of production

A prosthetic stem insertable in an intramedullary cavity to support an articulation component includes a proximal neck portion and a distal root portion. The proximal neck is solid metal and extends for a length effective to reach into the cavity and couple to surrounding bone for load bearing engagement therewith, while the distal root portion includes a stranded cable which fills the bone cavity but flexes to avoid significant transfer of bending stresses. The cable is tightly bunched at its junction with the neck, providing a transitional degree of stiffness to its distal part which is significantly more flexible and bends to accommodate natural displacement of the surrounding bone. The prosthesis may be formed of a compatible metal such as titanium, cobalt chromium, stainless steel or the like. The prosthesis has a section modulus characterized by three distinct regions. The proximal end region has the largest cross section and presents a stiff modulus of solid material, while the distal region is composed of strands and presents a flexible bending stiffness. An intermediate region of relatively short length where the cable attaches to the upper portion has a bending modulus that changes quickly from fairly stiff to flexible. The location of this portion may be varied by changing the relative lengths of the proximal solid and distal cable portions thus determining or limiting to a small local region the area of bone which may experience any stress shielding. The stiffness of the cable may also be varied by use of different gauge wires or the addition of welds or circumferential bands. In various embodiments, the cable may be entirely enclosed within a surrounding shell, may have its distal end crimped within a surrounding ring or cup, or may have its filaments welded or otherwise fused or bonded together at one or more regions. In one embodiment the cable is formed of asymmetric fibers which run parallel to each other to provide a bending modulus that is stiffer in one plane than in the transverse direction.

chromium/dental caries

Chromium-doped foresterite laser system

Denture adhesives with mixed salt copolymers of terpolymers

Denture adhesive compositions

Method of production of nanoparticle and nanoparticle produced by the method of production

Variable modulus prosthetic hip stem

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