Abstract: In the evaluation apparatus of the present invention, there are formed a plurality of minute channels having a cross-sectional area of not more than 1 mm2, one end of each of these channels joins in at a single meeting point and, when liquids are put into one or more of the liquid reservoirs in a higher position over any other liquid reservoir, the liquids flow down in the channels by gravity. Therefore, a scientific phenomenon, such as the diffusion of molecules, can be qualitatively observed. Furthermore, the apparatus provides a sufficient level of accuracy to enable the user to watch various phenomena involved in advanced technology, and uses no large quantity of chemicals or the like, which means little load on the environment.

Abstract: A method for experiment using a scientific phenomenon evaluation apparatus in which at least two reservoirs constituting an inlet and an outlet communicate with each other through a minute channel having a sectional area of 1 mm2 or less, the method comprising the steps of a preparatory step of removing air from the minute channel in advance by causing an inactive dummy liquid which does not react with an experimental liquid for performing an experiment to flow into and fill the minute channel, the preparatory step being performed at least one time and an experiment step of supplying the experimental liquid to the reservoir on the inlet side and feeding the experimental liquid into the minute channel by using a liquid feed device to cause the dummy liquid filling the minute channel to flow toward the reservoir on the outlet side.

Abstract: A scientific phenomena evaluation device comprising a base plate in which a plurality of long grooves having sectional areas of 1 mm2 or less are formed in a surface; and a cover plate that is bonded to the surface of the base plate and covers the long grooves to form a plurality of minute channels in the base plate, wherein one ends of the plurality of channels merge at one merging point, and the other ends of the plurality of channels communicate with reservoirs having capacities of 5 to 5000 mm3, one or more of the reservoirs are formed to house an absorption device, and scientific phenomena in the channels are visually perceivable.

Abstract: A scientific phenomena evaluation device comprising a base plate in which long grooves having sectional areas of 1 mm2 or less being formed in the surface and a cover plate that is placed on the surface of said base plate and covers said long grooves to form minute channels in said base plate, wherein said base plate and said cover plate are bonded together without an adhesive, and scientific phenomena in said channels are visually perceivable.

Abstract: In a method of producing magnetic particles which includes the steps of preparing alloy particles capable of forming a CuAu or Cu3Au hard magnetic ordered alloy phase and of forming magnetic particles for forming CuAu or Cu3Au magnetic particles, a plurality of solutions L1 and L2 for preparing the alloy particles are passed in a thin-plate laminar flow and diffused in the direction perpendicular to the flow direction at the contact interface of the solutions L1 and L2 in a mixing channel by using a microreactor, whereby a uniform mixing reaction is conducted in a short time.

Abstract: According to the invention, the plurality of long grooves each having a cross-sectional area of not more than 1 mm2 are formed, an end of each of the plurality of flow passages joins in at one meeting point and furthermore, a liquid delivering device is provided. Therefore, it is possible to qualitatively observe scientific phenomena, such as the dispersion phenomena of molecules. Also, accuracies sufficient for experiencing high technologies, for example, various phenomena such as the diffusion phenomenon of a liquid, heat transfer phenomenon of a liquid, mixing phenomenon of liquids and chemical reactions of a liquid that occur in this fine flow passage are obtained, consumption of chemical agents and the like is small and environmental burdens are small. Therefore, the scientific phenomena evaluation apparatus is appropriate as an educational tool for scientific experiments.

Abstract: In the scientific phenomena evaluation device of the present invention, a plurality of long grooves each having a cross-sectional area of not more than 1 mm2 are formed, an end of each of the plurality of flow passages joins in at one meeting point and furthermore, a liquid absorption device is provided. Therefore, it is possible to qualitatively observe scientific phenomena, such as the dispersion phenomena of molecules. Also, accuracies sufficient for experiencing high technologies, for example, various phenomena such as the diffusion phenomenon of a liquid, heat transfer phenomenon of a liquid, mixing phenomenon of liquids and chemical reactions of a liquid that occur in this fine flow passage are obtained, consumption of chemical agents and the like is small and environmental burdens are small. Therefore, this evaluation device of scientific phenomena is appropriate as an educational tool for scientific experiments.

Abstract: According to the scientific phenomenon evaluation device of the present invention, a test liquid is injected into the first reservoir while sample liquids are injected into the second reservoirs. When the test liquid is supplied to the second reservoirs by being caused to flow through the branching-structure channel, the test liquid and the sample liquid mix and react with each other to cause, for example, a scientific phenomenon such that the colors of the sample liquid change. Thus, the plurality of sample liquids can be evaluated by injecting the test liquid one time. In this case, the scientific phenomenon can be grasped with a single glance since at least the scientific phenomenon in the second reservoirs is visually recognizable. Moreover, the scientific phenomenon evaluation device of the present invention can be effectively used as a portable pH measurement experimental device.

Abstract: According to the present invention, a continuous layer liquid used as a continuous layer of a diffusion phenomenon is injected into the first reservoir, and passed through the channels to the second reservoirs to fill the plurality of radially formed channels with the continuous layer liquid. Then, a predetermined amount of diffusion experiment reagent, for example, a coloring liquid used as a diffusion substance of the diffusion phenomenon is injected into the first reservoir. This causes the diffusion experiment reagent to be diffused from the first reservoir to the second reservoirs only by the diffusion phenomenon. At this time, the radially formed channels have the different sectional areas, and thus the diffusion experiment reagent is diffused through the channels at different velocities. This allows the diffusion phenomena that occur in the micro channels or the diffusion velocities to be observed or measured with ease using an inexpensive device.

Abstract: An evaluation apparatus of scientific phenomena, comprising: a base plate of a plate-like body whose surface is formed a long groove having a transversely cross-sectional area of not more than 1 mm2; and a cover plate that is disposed on a surface of the base plate in close contact therewith and forms a fine flow passage on the base plate by covering the long groove, wherein scientific phenomena in the flow passage can be visually recognized.