Abstract: A calcium phosphate composition comprising tetracalcium phosphate particles (A), calcium hydrogen phosphate particles (B) and at least one kind of inorganic particles (C) selected from silica particles or titania particles, wherein the mixing ratio (A/B) of (A) to (B) is from 45/55 to 55/45 in molar ratio, the inorganic particles (C) have an average particle diameter of from 0.002 to 0.5 ?m, and the inorganic particles (C) are contained in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of (A) and (B) in total. Thereby provided is a calcium phosphate composition such that when it is used as a material for bone repair, a formed bone has high mechanical strength and a high bone replacement rate is achieved.

Abstract: A dental composition for oral use, containing a phosphorylated saccharide (a), a cationic bactericidal agent (b) and a solvent (c). By using the dental composition for oral use of the present invention, the adhesion of the bacteria in the oral cavity to the surfaces of the teeth can be suppressed for a long period of time; therefore, the dental composition for oral use can be suitably used for, for example, a mouse-wash agent, a dentifrice agent, a gargling agent, a mouse spray, a coating agent or a bonding agent to tooth surface or a dental prosthetic, a hypersensitive inhibitor, a therapeutic agent for periodontal diseases, that is applied to a periodontal pocket, or the like.

Abstract: The present invention provides a polymerizable composition that exhibits excellent adhesive properties to a tooth structure (particularly dentin) when applied as a dental material, and a polymerizable monomer that is used as a component of the polymerizable composition. The present invention is a polymerizable monomer (A) that is a compound having at least two polymerizable groups. The polymerizable monomer (A) has a retention time of 7 minutes to 30 minutes in a high-performance liquid chromatography (HPLC) measurement conducted under a condition in which a column with an inner diameter of 3.9 mm and a length of 300 mm, packed with a C18 packing material having been crushed to have an average particle size of 10 ?m and a pore size of 125 angstroms, is used, an eluent is a mixed solvent of methanol and water contained at a ratio of 3:7, a flow rate is 1.0 mL/minute, a measurement temperature is 50° C.

Abstract: An apparatus including a probe unit and a control/imaging unit, the probe unit including a converter converting a sampled magnetic-resonance signal into a digital signal, a first transmitter converting the digital signal into a first-radio signal, a first receiver receiving a second-radio signal, and performing detection on the second-radio signal to obtain a first-received signal, and a clock-regeneration unit regenerating a clock component from the first-received signal to generate a regenerated-clock signal, the control/imaging unit including a second-receiver receiving the first-radio signal to obtain a second-received signal, a data processor performing data processing on the second-received signal in synchronism with a reference-clock signal to obtain a video signal, and a second transmitter including a modulator modulating a carrier wave using the reference-clock signal, the second transmitter converting the reference-clock signal into the second-radio signal and transmitting the second-radio signal th

Abstract: A curable composition for dental use, containing a polymerizable monomer, inorganic particles (A) having irregular shapes and an average particle size of from 1.0 to 5.0 ?m, wherein the inorganic particles (A) are surface-treated with a silane coupling agent (a) represented by the formula (I): wherein R1 is a hydrogen atom or a methyl group, R2 is a hydrolyzable group, R3 is a hydrocarbon group having 1 to 6 carbon atoms, X is an oxygen or sulfur atom, p is 2 or 3, and q is an integer of from 8 to 13, and inorganic particles (B) having irregular shapes and/or spherical or nearly spherical shapes, and an average particle size of from 0.01 to 0.

Abstract: A novel compound (I) represented by the following formula (1) is provided which is suitable for a dental composition and has a polymerizable group, a carboxyl group and a phosphoric acid group. A method for producing a polymerizable amide is provided, which method can make a condensation reaction of a carboxylic acid with an amine to proceed easily and is excellent in safety: wherein R1, R2 and R3 each independently are a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms which may have a substituent; (A) and (B) are each any constituent unit; m is an integer of from 1 to 3; n is an integer of from 1 to 3; R4 is an organic group having 1 to 40 carbon atoms which may have a substituent; R5 is a hydrocarbon group having 1 to 20 carbon atoms which may have a substituent, R6 and R7 each independently are a hydrogen atom, a hydrocarbon group having 1 to 20 carbon atoms which may have a substituent, or a metal atom.

Abstract: The present invention provides a polymerizable composition that imparts excellent adhesive properties with respect to tooth structure (particularly dentin) when applied as a dental material, and provides a polymerizable monomer that is used as a component of the polymerizable composition. The present invention is a compound (A) that is a compound represented by the following formula (1): where G indicates a polymerizable group, m indicates an integer of 2 or more, n indicates an integer of 1 or more, and the sequence order of m units having a polymerizable group and n units having a hydroxyl group is arbitrary. The present invention also is a polymerizable composition containing the compound (A).

Abstract: The present invention provides a composition that exhibits excellent adhesive properties to tooth structure (particularly dentin) when applied as a dental material. The present invention is a composition containing a polymerizable monomer (A) having an unconjugated carbon chain with at least four carbon atoms bonded continuously, at least two polymerizable groups, and at least two hydroxyl groups, and a bisacylphosphine oxide (B) represented by the following formula (1): where the respective symbols are as defined in the specification.

Abstract: The present invention provides a composition suitable for a dental composition. The present invention is a composition containing: a polymerizable monomer (A) having an unconjugated carbon chain with at least four carbon atoms bonded continuously, at least two polymerizable groups, and at least two hydroxyl groups; and a water (B). The composition contains 6 to 2000 parts by weight of the water (B) with respect to 100 parts by weight of the whole amount of polymerizable monomer components. When suitable components are added to this composition, the resultant composition can be used suitably for dental materials such as a primer, bonding material, composite resin, and cement.

Abstract: The present invention provides a composition suitable for a dental composition. The present invention is a composition containing: a polymerizable monomer (A) having an unconjugated carbon chain with at least four carbon atoms bonded continuously, at least two polymerizable groups, and at least two hydroxyl groups; and a polymerizable monomer (B) having one polymerizable group and at least one hydroxyl group. When a suitable component is added to this composition, the resultant composition can be used suitably for dental materials such as a primer, bonding material, composite resin, and cement.

Abstract: This radar device includes: a transmitter to transmit a transmitting signal whose frequency is periodically increased/decreased at a predetermined rate of change; a mixer to generate a beat signal by multiplying a received signal being transmitted by the transmitter and reflected back from an object to be detected and the transmitting signal; a frequency detector to detect a frequency of the beat signal; and a controller to control the rate of change of the frequency of the transmitting signal so that the frequency of the beat signal detected by the frequency detector becomes equal to or larger than a cut-off frequency of a flicker noise caused by the mixer.

Abstract: A radio receiver comprises a first amplifier to amplify a received radio signal; a quadrature demodulator to demodulate the radio signal amplified by said first amplifier and thereby generate a baseband signal; a second amplifier to amplify the baseband signal; a demodulator to demodulate the baseband signal amplified by said second amplifier; and a gain controller to control timing of a change in a gain of said second amplifier, in case that changing the gain of said first amplifier and the gain of said second amplifier, on the basis of a gain of said first amplifier before and after the change.

Abstract: A radio receiver comprises a first amplifier to amplify a received radio signal; a quadrature demodulator to demodulate the radio signal amplified by said first amplifier and thereby generate a baseband signal; a second amplifier to amplify the baseband signal; a demodulator to demodulate the baseband signal amplified by said second amplifier; and a gain controller to control timing of a change in a gain of said second amplifier, in case that changing the gain of said first amplifier and the gain of said second amplifier, on the basis of a gain of said first amplifier before and after the change.

Abstract: A radio receiver comprises a first amplifier to amplify a received radio signal; a quadrature demodulator to demodulate the radio signal amplified by said first amplifier and thereby generate a baseband signal; a second amplifier to amplify the baseband signal; a demodulator to demodulate the baseband signal amplified by said second amplifier; and a gain controller to control timing of a change in a gain of said second amplifier, in case that changing the gain of said first amplifier and the gain of said second amplifier, on the basis of a gain of said first amplifier before and after the change.