Abstract: It is an object to provide a magnetic disk substrate highly reliable to prevent the occurrence of crash failure even if a magnetic disk is rotated at high speed, and suitable for a hard disk that starts and stops by the load/unload method, and a magnetic disk using such a substrate. The representative structure of a magnetic disk substrate according to this invention is a disk-shaped glass substrate 10 having a generally flat main surface 11, an end face 12, a chamfered face 13 formed between the main surface 11 and the end face 12, and an offset portion, at the periphery of the main surface 11, raised or lowered with respect to a flat surface, other than the periphery, of the main surface 11, and characterized in that the magnitude of the offset portion is approximately uniform over the entire circumference of the glass substrate 10.

Abstract: When mirror polishing is performed on a glass substrate by bringing a polishing pad into contact with the surface of the glass substrate while supplying a polishing liquid containing polishing grains to the substrate surface, the pH of the polishing liquid is maintained within a certain range or the agglomeration degree or dispersion degree of the polishing liquid is controlled. Consequently, an adequate mirror polishing rate can be maintained and there can be obtained a glass substrate having a good end shape.

Abstract: In a method of producing a glass substrate for a magnetic recording medium, including the steps of grinding a principal surface of the glass substrate of a disk-shape and polishing, after the grinding step, the principal surface of the glass substrate by an abrasive liquid including abrasive grains, the abrasive liquid includes colloidal silica abrasive grains as the abrasive grains and further includes an alkali so that a pH value of the abrasive liquid is adjusted to be greater than 10.2 and not greater than 12.

Abstract: A method for producing low potassium juice with improved taste. The process includes the steps of treating potassium-containing juice with a cation exchange resin to remove 90% or more of the potassium content in the juice and adding a calcium compound which is calcium carbonate in the form of solid. The juice produced has improved taste and nutritional balance. It is also good for patients suffering from kidney failure.

Abstract: A process for delivering the orally administered active ingredients which are safe even in their successive administrations for a long period to the large intestine without elution of the ingredients before reaching the large intestine is disclosed. The process according to the present invention comprises a step of administering orally to animals including human a composite comprising a core containing the active ingredients, an internal layer comprising chitosan with which the core is coated, and an external layer comprising a gastric acid resistant material with which the internal layer is coated, wherein all of the materials in the composite have the empirically established safety to humans. When a material having an iron cation scavenging ability, particularly phytin is used as the active ingredient, it is possible to treat colon cancer efficiently by the process according to the present invention.

Abstract: An objective of the present invention is to provide compositions for supplying minerals to patients who underwent gastrectomy to thereby treat or prevent postgastrectomic syndrome. The composition for postgastrectomic mineral supply according to the present invention comprises an indigestible oligosaccharide and/or an indigestible sugar alcohol and a mineral.

Abstract: A material inhibiting lipid peroxide-increase containing fructooligosaccharides is described which can conveniently provide at a low cost a food or drink product which exerts an excellent effect of inhibiting an increase in lipid peroxides without largely changing the daily dietary contents. The intake of the material inhibiting lipid peroxide-increase of the present invention can provide an excellent means for preventing various diseases (cancer, arterial sclerosis, etc.) caused by the formation of lipid peroxides, retarding aging, etc. Moreover, use of the material inhibiting lipid peroxide-increase of the present invention makes it possible to conveniently provide foods and drinks having excellent effects of inhibiting an increase in lipid peroxides at a low cost.

Abstract: A material for the prevention and treatment of osteoporosis characterized by containing minerals and indigestible oligosaccharides. The material for the prevention and treatment of osteoporosis according to the present invention is excellent in the absorption of calcium and the reduction in a bone salt amount which is observed in the osteoporosis can be depressed. Accordingly, by taking the material for the prevention and treatment of osteoporosis according to the present invention, the osteoporosis which often occurs particularly in postmenopausal women is effectively prevented and its progress can be retarded.

Abstract: The present invention relates to a secret identification number checking system for comparing a secret identification number stored in a magnetic card (11) and a secret identification number entered by the bearer of the magnetic card. Data to enable the comparison is stored in a card medium (13), and the card medium (13) and a transaction machine (17) mutually authenticate each other. When if both the card medium (13) and the transaction machine (17) are legitimate, the card medium (13) sends the data to the transaction machine (17) to permit the secret identification number stored in the magnetic card (11) to be compared with the secret identification number entered by the bearer of the magnetic card. The secret identification number checking system thus improves the security of transactions.

Abstract: An IC card which has a timer circuit that shuts off the IC card within a predetermined time interval is used with a terminal which resets the timer circuit in the IC card in response to any terminal operations. This prevents the IC card from shutting itself off during the terminal operations.

Abstract: An IC card reader/writer has frequency mode identifying means for determining whether or not an IC card loaded thereon has an identifiable frequency. When the frequency mode of the IC card is identifiable, clock frequency determining means reads frequency data representative of an operating clock frequency out of the IC card to determine an operating clock frequency particular to the card. Based on the determined operating clock frequency of the IC card, frequency setting means converts reference clock pulses being generated by reference clock generating means into clock pulses which match the clock frequency of the IC card, and feeds those clock pulses to the card. The reader/writer is capable of producing clock pulses the frequency of which is variable in matching relation to the frequency of operating clock pulses of an IC card.

Abstract: A process for preparing endoinulase by cultivating a microorganism belonging to the genus Aspergillus and capable of producing inulase and recovering the inulase produced and accumulated in the culture medium by organic solvent precipitation, wherein inulase having a high exo activity is first precipitated at a low concentration of a water-soluble organic solvent and is removed, and then inulase having a high endo activity is precipitated at a high concentration of the water-soluble organic solvent and is recovered.