Fujifilm Corporation

Tomohide Ueyama

Yasunori Ichikawa

Fumiko Shiraishi

Norihito Kasada

Yuto Murata

Seiji Sugiyama

Yasushi Hattori

Koukichi Waki

Jun Arakawa

Teruo Fujii

Hideharu Nagasawa

Shota Kamimura

Akira Kato

Tetsuo Kurahashi

The magnetic tape container includes a core around which a magnetic tape is wound. The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder, and the roundness of the trajectory of one rotation drawn by the magnetic tape in a case where the wound magnetic tape is pulled out from the core is 100 &#x3bc;m or less as the arithmetic mean of the measured values at three points in the width direction of the magnetic tape.

Magnetic tape container

The magnetic tape container includes a core around which a magnetic tape is wound. The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. A maximum value of a deviation of a center position of an average minimum region reference circle of a trajectory of one rotation drawn by the magnetic tape, in a case where the wound magnetic tape is drawn out from the core core is 100 &#x3bc;m or less for three points of the magnetic tape in a width direction.

In a method of producing magnetic particles which includes the steps of preparing alloy particles capable of forming a CuAu or CuAu hard magnetic ordered alloy phase and of forming magnetic particles for forming CuAu or CuAu magnetic particles, a plurality of solutions Land Lfor 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 Land Lin a mixing channel by using a microreactor, whereby a uniform mixing reaction is conducted in a short time.

Method of producing magnetic particles and reaction method using microreactor and microreactor

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.

Scientific phenomena evaluation device, diffusion velocity measurement experimental device, and manufacturing method of the device

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 mm, 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.

Evaluation apparatus for scientific phenomena and evaluation method for scientific phenomena using the same

In the scientific phenomena evaluation device of the present invention, a plurality of elongated grooves each having a cross-sectional area of not more thanmmare 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.

Scientific phenomena evaluation device, educational tool for scientific experiments and manufacturing method of the device and tool

An evaluation apparatus of scientific phenomena, including:

Growing community of inventors

Minami-ashigara, Japan

Tomohide Ueyama