Alkaline hydrolysis of the ether-insoluble resin glycoside (convolvulin) fraction of the roots of Ipomoea operculata (GOMES) MART. (Convolvulaceae) afforded a glycosidic acid named operculinic acid H along with isovaleric, tiglic, and exogonic (3,6:6,9-diepoxydecanoic) acids. Operculinic acid H was characterized to be 3S,12S-
In order to make features of small-scale faults of outcrop scale in Neogene siliceous rocks clear, outcrop observations, boring-core observations and borehole-wall image analyses were carried out, as a preliminary investigation for geological structure model construction which considers structures which exert big influence on flow and mass transfer of underground water. As a result, faults crossing a bedding plane at a high angle and faults parallel to a bedding plane were observed, and their formative process, origin, distribution and permeability were estimated. Faults crossing a bedding plane at a high angle tend to be distributed densely and to form a characteristic structure that is thought to contribute to a major water conducting feature.
Authors have developed the new treatment technique for hexavalent chromium (Cr6+) in the liquid waste. Cr6+ can be reduced to trivalent chromium (Cr3+) by hydrogen peroxide (H2O2) under acidic condition with small amount of secondary waste. In 2010, this technique was applied to the cooling water for iron-water shield surrounding the core region in Fugen Nuclear Power Station of Japan Atomic Energy Agency (JAEA). The concentration of Cr6+ and total chromium (Cr) were reduced to less than 0.5ppm and 2.0ppm in liquid waste, respectively. These values satisfy the water pollution prevention law.
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