摘要:
Polymer particles are provided which contain fluorescent molecules with high presence ratio in a polymer layer thereof and a method for preparing thereof. Polymer particles are swelled in a non-aqueous solution excluding exclusively water preferably promotes selling of the polymer layer and transfer of the fluorescent molecules to the polymer layer could not protected by water molecules such that much more fluorescent molecule may be introduced into inside of the polymer layer. Furthermore, since the water is added to the reaction system prior to evaporation removal of the non-aqueous solvent, dry-up of the polymer particles is prevented by the water remained in the reaction system and the polymer particles including fluorescent molecules with high presence ratio of the fluorescent molecules preferably keep high dispersibility using the above described procedures.
摘要:
[Object] To provide a polymer coated ferrite fine particles being possible to control a particle size uniformly while having high aqueous dispersibility and preferred biomolecule immobilization ability and an easy method for preparing the same.[Means Addressing Object] In an aqueous solvent, iron ion is protected by chelating polyacrylic acid and then alkaline is added. Thereafter, a reaction system is heated under pressurized condition to produce simultaneous precipitation of the ferrite fine particles and coating thereof. As the result, the polymer coated ferrite fine particles having uniform particle size may be prepared in one step with excellent reproducibility. The polymer coated ferrite fine particles of the present invention has high water dispersibility and has preferred biomolecule immobilization performance by carboxyl groups coming from the polyacrylic acid.
摘要:
An object of the present invention is to provide a novel biosensing method as the novel application development of the magnetic particles in the biosensing. In an affinity reaction of biosensing, ligands are immobilized to magnetic fine particles and the magnetic fine particles are forced to reaction fields of the affinity reaction by magnetic guiding so as to bring the affinity reaction, which is the velocity controlling factor in the sensing, to high rates. According to the present invention, coated magnetic fine particles with having both of the high dispersion performance and high magnetic responsibility as the above described magnetic fine particles and the affinity reaction occurs quickly and in high density such that the present invention makes it possible to obtain relatively large signals within significantly short time duration when compared to the conventional art.
摘要:
A candle type chemical oxygen generator which insures complete thermal decomposition of the candle with a predetermined flow rate of oxygen while maintaining the generator housing at a low temperature. Oxygen generated as a result of the thermal decomposition of the oxygen generating candle (32) by triggering the ignition device (F'), passes through cylindrical thermal insulation (36) and an annular gap between the cylindrical thermal insulation (36) and the cylindrical member (37) which houses the candle to thereby cool the cylindrical member, and is supplied to the exterior through the oxygen supply device (S').
摘要:
A monolithic refractory powder mixture containing from 2 to 3 wt % of spheroidized refractory particles having a mean particle size of at most 30 .mu.m of at least one member selected from the group consisting of alumina cement, alumina, titania, bauxite, diaspore, mullite, aluminous shale, chamotte, pyrophyllite, sillimanite, andrewsite, silica rock, chromite, spinel, magnesia, zirconia, zircon, chromia, silicon nitride, aluminum nitride, silicon carbide, boron carbide, zirconium boride and titanium boride, and having a cone flow value of at least 180 mm when a refractory mixture having the powder mixture kneaded by an addition of 6 parts by weight of water per 100 parts by weight of the powder mixture, is cast into a cone-shaped mold with a dimension of 70 mm.o slashed.-100 mm.o slashed..times.60 mm and left to stand for 60 seconds without exerting vibration after removing the cone-shaped mold.
摘要:
A voice coil type actuator wherein the length in an axial direction and the number of parts is reduced without deteriorating a required function and the magnetic flux density in a space in which a movable coil is located is substantially uniform over the entire length in an axial direction. The voice coil type actuator comprises a fixed guide shaft having a radial portion made of a permeable material and a movable body supported for axial sliding movement on the guide shaft. The movable coil is supported coaxially with the guide shaft on the movable body. A yoke having a substantially cylindrical profile is disposed in such a manner as to surround a range of movement of the movable coil, and a pair of fixed magnets are disposed in contact with the guide shaft and the yoke and magnetized with the opposite polarities in a radial direction. The yoke has a recess formed therein in the axial direction of the yoke, and a movable member to be moved by the actuator is supported at a portion of the movable body which extends laterally through the recess in the yoke.
摘要:
A two-phase brushless motor has a rotor comprising at least a pair of first magnetic poles and a pair of second magnetic poles which are smaller in width than the first magnetic poles, and a stator comprising at least a pair of first coils and a pair of second coils for producing a first phase and a second phase of varying magnetic fields, respectively, so that the torques respectively obtained from the interaction of the two pairs of magnetic poles and the two phases produced by the two pairs of coils differ from each other.