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About one-third of the stored soil carbon in the world is contained in large organic pools in northern taiga and tundra systems (Oechel and Billings 1992). In these ecosystems, at least 95% of the nutrients were incorporated in the soil (Marion et al. 1982). Therefore, plant growth or net primary production (NPP) is severely constrained by nutrient availability in high-latitude ecosystems, since the...
Permafrost region of Siberia is mostly covered with larch forest or forest tundra. The permafrost-affected soils were generally classified as Cambisols (moderately developed soils) on plain topography and Leptosols (shallow and high gravel content soils) in mountainous topography (FAO 1993). The latest revision of soil classification systems of both USDA and FAO adopted permafrost as a diagnostic...
This paper describes a power amplifier module (PAM) for 0.9-GHz WCDMA handsets applications. The PAM, assembled in a 3 mm × 3 mm package, features bulk Si-CMOS and GaAs-HBT hybrid architecture for pursuing low cost while maintaining high efficiency and high- and low-power mode (HPM and LPM) function required for commercially available PAM products. The CMOS die accommodates a driver stage for the...
(1) A distinctive structural feature of P450 is the unusual thiolate coordination to heme. We have succeeded in the preparation of the first synthetic thiolato-iron porphyrin (SR complex) which retains its structure during catalytic oxidation. Experiments using SR complex have revealed that the thiolate ligand greatly accelerates the rate of the O O bond cleavage and its heterolysis even in highly...
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