Abstract: A novel mineral-containing functional beverage is produced by adding weathered hermatypic coral to a water solution of an oxide or/and carbonate of an alkaline earth metal, such as calcium or magnesium. In particular, the ratio of the calcium or magnesium oxide or/and carbonate to the weathered hermatypic coral is from 0.01 to 1 part of the former to from 5 to 9.99 parts of the latter. A powdered mineral-containing functional food is produced by subjecting the water solution to spray drying or freeze drying.

Abstract: The inventor found for the first time that an extracted material from coral sand occurring in nature contains physiological activating substances. Based on this observation, in a process according to the present invention, physiological activating substances are extracted from coral sand by an appropriate extraction method. The extracted physiological activating substances are used as ingredients of cosmetics, food, and medicines. According to the present invention, physiological activating substances can be extracted in an industrially available form.

Abstract: The invention relates to a process for producing a sintered body of calcium carbonate without permitting thermal decomposition of calcium carbonate during sintering, and to the sintered body. A powder material primarily comprising calcium carbonate is subjected to a cold powder pressing process to prepare a green compact, which is then heated in a high-pressure gas atmosphere consisting essentially of an inert gas at a temperature t.degree. C. of900.ltoreq.t<1200and at a high gas pressure P kgf/cm.sup.

Abstract: The present invention relates to a packaging sheet for perishable goods which is mixed with coral sand. The packaging sheet with coral sand exhibits an excellent freshness-keeping effect for perishable goods when such goods are packaged in the sheet, due to the functions of the coral sand contained in the sheet.

Abstract: An agent for adsorbing and preventing leakage of heavy metals in the industrial waste, etc. includes coral sand of 60 mesh or less. The coral sand can be heated in the atmosphere of reduced pressure, vacuum or argon or nitrogen gas, or air dried in order to accelerate activation of coral sand.

Abstract: Coral sand obtained from living skeletons or semi-fossils of hermatypic coral or reef-building coral is ground into about 150 to 500 mesh and the resulting coral sand powders are provided as drinkables or tablets for promotion of health.

Abstract: A process for preparing a silver-plated coral sand useful as a bacteriological inhibitor for drinking water is provided. The process comprises (1) heating desalted coral sand in an inert gas under reduced pressure; (2) thoroughly washing the resulting activated coral sand with water; (3) soaking the so washed coral sand in a silver-ammonia complex solution with heating under reduced pressure, adding a trace amount of glucose as a reducing agent to the complex solution, maintaining the soaked state to thereby effect plating the coral sand with silver; (4) evaporating the silver-plate coral sand to dryness with heating under reduced pressure; (5) thoroughly washing the silver-plated coral sand with water, and (6) then drying the silver-plated coral sand.