The new mineral, the iron analogue of monticellite, occurs in melilite-nephelinite Iava from Mt. Shaheru, Belgian Congo, associated with melilite, nepheline, clinopyroxene, kalsilite, gdtzenite, combeite, sodalite, magnetite, perovskite, apatite, hornblende, biotite, and an unident i f ied mineral . Analysis gave SiO2 32.77,TiO20.23, AIzOa0.26, Fe2Oa 0.66, FeO 29 34, MnO 1.65, MgO 4.95, CaO 29....

OBJECTIVES To assess the effectiveness of calcium supplementation for improving bone mineral density in healthy children and to determine if any effect is modified by other factors and persists after supplementation stops. DESIGN Meta-analysis. DATA SOURCES Electronic bibliographic databases, hand searching of conference proceedings, and contacting authors for unpublished data. REVIEW MET...

Remote sensing techniques and spatial data analysis through Geographic Information Systems (GIS) have been jointly applied in a mineral exploration context to identify gold-rich potential areas in SE Spain. Results conŽ rm the usefulness of this integrated methodological approach as an eVective tool to assess mineral potential in the studied region. Satellite and airborne image analysis have oV...

Mineral metabolism in the mother must adapt to the demand created by the fetus and placenta, which together draw calcium and other minerals from the maternal circulation to mineralize the developing fetal skeleton. Similarly, mineral metabolism must adapt in the lactating woman to supply sufficient calcium to milk and the suckling neonate. Potential adaptations include increased intake of miner...

1. Bone mineral content of the second, third and fourth lumbar vertebrae was determined in normal women and women with clinical osteoporosis by using dual-photon (153Gd) absorption. 2. A cross-sectional study of 70 normal (aged 19-88 years) showed a bone loss of 44% from the age of around 34 years throughout life. 3. Longitudinal data from 59 normal women confirmed that the vertebral bone loss ...

BACKGROUND Recent studies have demonstrated that several mineral products sold for medicinal purposes demonstrate antimicrobial activity, but little is known about the physicochemical properties involved in antibacterial activity. METHODOLOGY/PRINCIPAL FINDINGS Using in vitro mineral suspension testing, we have identified two natural mineral mixtures, arbitrarily designated BY07 and CB07, wit...

A method of clay mineral sample preparation for electron microprobe analysis has been developed in which a film of clay plus 10-12 wt. % colloidal graphite is deposited on a porous ceramic disc using a specially designed suction device. Correction procedures are used to obtain quantitative elemental analyses representing the average chemical composition of the prepared sample. A statistical tec...

-A method of clay mineral sample preparation for electron microprobe analysis has been developed in which a film of clay plus 10-12 wt. % colloidal graphite is deposited on a porous ceramic disc using a specially designed suction device. Correction procedures are used to obtain quantitative elemental analyses representing the average chemical composition of the prepared sample. A statistical te...

Numerous investigations performed in animal models in the past 10 years have shown repeatedly that non-digestible oligosaccharides (NDO), such as inulin, oligofructose or transgalacto-oligosaccharides (TOS), stimulate mineral absorption, mainly calcium and magnesium. Long-term beneficial effects on bone health have been indicated by accumulation of bone mineral content in growing rats or preven...