The new mineral, nambulite, is a lithium- and sodium-bearing hydrous manganosilicate discovered at the Funakozawa manganese mine in the Kitakami mountains, northeastern Japan. Coarse prismatic crystals of the mineral occur in the veinlets in the braunite ore. It has vitreous reddish brown color with orange tint; and perfect (001), distinct (100) and (010) cleavages. Mohs' hardness is 6.5. Specific gravity is 3.51±0.01 (meas.) and 3.49 (calc.). Optically it is biaxial positive with refractive indices (Na-light) α=1.707, β=1.710, γ=1.730 (all±0.002); with 2V=30° ±2° and X'∧c=19°. Chemical analysis gives: SiO2 49.23, TiO2 0.01, Al2O3 0.37, Fe2O3 0.40, MnO 40.67, MgO 1.32, CaO 0.81, Na2O 2.49, K2O 0.04, P2O5 0.02, Li2O 1.55, H2O+ 1.63, H2O- 0.26, CO2 0.19, total 98.99%. The result yields the formula Li1.00(Na0.98K0.01) (Mn6.95Mg0.40Li0.27Ca0.18Al0.09Fe+30.06) Si10.00O27.79(OH)2.21, which may be written ideally as LiNaMn8Si10O28(OH)2. It is triclinic and the crystallographic data are as follows: space group, P1 or P ?? ; a=7.621, b=11.761, c=6.731Å (all ±0.003Å); α=92°46', β=95°05', γ=106°52' (all ±3'); V=573.4±0.3Å3; Z=1. Principal powder lines (d in Å) with relative intensities and indices are: 7.11 (25) ( ?? 10), 6.70 (25) (001), 3.56 (20) ( ?? 20), 3.54 (35) (12 ?? ), 3.34 (40) (1 ?? 1, 002, ?? 01), 3.17 (65) ( ?? 02, 031), 3.14 (45) (012), 3.09 (55) ( ?? 12), 3.07 (60) (2 ?? 1), 3.01 (30) (11 ?? ), 2, 97 (80) (0 ?? 2), 2.96 (100) (1 ?? 2), 2.92(70) ( ?? 40, 102), 2.71 (35) (112, 220). Infrared spectrum shows strong absorptions at 1040, 935, 890 and 460 cm-1. Nambulite may be an alkaline analogue of rhodonite. The mineral name is for Professor Matsuo Nambu of Tohoku University.
Folate performs major functions in a variety of physiological processes, including DNA synthesis, cell division, and amino acid interconversions. The major known result of folate deficiency is megaloblastic anemia, and maternal folate deficiency may induce neural tube defects at birth. In addition, a lack of sufficient dietary intake of folate has recently been reported to increase the risk of vascular disease in the elderly. In 2005 Japan's Ministry of Health, Labour and Welfare established the Estimated Average Journal of Analytical Bio-Science Vol. 32, No 2 (2009)
A simple analytical model with three fitting parameters could simulate the thermal diffusion of scanned and focused laser power on a direct overwrite (DOW) magneto-optical (MO) disk. Three different experiments on the disk give the three fitting parameter values. The thin film structure of the DOW-MO disk has no aluminum layer which current MO disks have, so that the total thermal diffusivity of DOW-MO disks is less than that of the current MO disk. However, the thermal response functions of DOW-MO disks and the current MO disk are not greatly different. Accordingly, as well as the current MO disk, the DOW-MO disk is suitable for high data density recording using the technique of thermal interference uniforming (TIU) to make uniform mark edge shifts. Without TIU, the shifts of edges would depend on the pattern of recorded data.
