bentonite method
51Chitosan — Other names Poliglusam; Deacetylchitin; Poly (D)glucosamine Identifiers …
52Molding sand — Molding sand, foundry sand, or green sand is sand that when moistened or oiled tends to pack well and hold its shape. It is used in the process of sand casting.Green sandGreen sand is an aggregate of sand, bentonite clay, pulverized coal and… …
53Korean pottery and porcelain — Cheongja unhak sanggam mun maebyeong , adorned with drawings of the red cranes. Korean ceramic history begins with the oldest earthenware from around 8000 BC. Contents 1 History …
54Measurement while drilling — Well logging Gamma ray logging Spontaneous potential logging Resistivity logging Density logging Sonic logging Caliper logging Mud logging LWD/MWD v · …
55New Safe Confinement — Computer impression of the New Safe Confinement to cover No.4 Reactor at Chernobyl The New Safe Confinement (NSC or New Shelter) is the structure intended to contain the nuclear reactor at Chernobyl, Ukraine, part of which was destroyed by the… …
56Directional boring — A small directional boring unit in action Directional boring, commonly called horizontal directional drilling or HDD, is a steerable trenchless method of installing underground pipes, conduits and cables in a shallow arc along a prescribed bore… …
57World Trade Center — For other uses, see World Trade Center (disambiguation). World Trade Center[1] …
58Layered double hydroxides — (LDH) comprise an unusual class of layered materials with positively charged layers and charge balancing anions located in the interlayer region. This is unusual in solid state chemistry: many more famililies of materials have negatively charged… …
59Hungary — /hung geuh ree/, n. a republic in central Europe. 9,935,774; 35,926 sq. mi. (93,050 sq. km). Cap.: Budapest. Hungarian, Magyarország. * * * Hungary Introduction Hungary Background: Hungary was part of the polyglot Austro Hungarian Empire, which… …
60sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …
