CABD tools

Finally, a caveat. Despite its documented success in many situations, bioremediation may not always be able to meet current clean-up criteria for a particular site. Some standards are so tight that they are essentially "detection limit" standards, and it is not clear that biological processes will be able to remove contaminants to such low levels. For example, the level of contaminant may be so low that it does not induce the microorganisms to produce the enzymes necessary for biodegradation. Or perhaps the contaminant is bound to soil or sediment particles in such a way that it is not available for biodegradation, although it is stiU extractable with aggressive solvents in analytical procedures. These are areas that require further research, but bioremediation will be more likely to hilfill its promise as an important tool in contaminated site remediation if there is progress towards standards based on bioavailabihty and net environmental benefit from the clean up, rather than on arbitrary absolute standards.  [c.39]

A rather impressive Hst of materials and products are made from renewable resources. For example, per capita consumption of wood is twice that of all metals combined. The ceUulosic fibers, rayon and cellulose acetate, are among the oldest and stiU relatively popular textile fibers and plastics. Soy and other oilseeds, including the cereals, are refined into important commodities such as starch, protein, oil, and their derivatives. The naval stores, turpentine, pine oil, and resin, are stiU important although their sources are changing from the traditional gum and pine stumps to tall oil recovered from pulping.  [c.450]

As discussed in CbapL 6, copper-mediated diasteteoselective addition and substitution reactions ate well studied metliods for the construction of chiral centers in organic molecules. Tlie development of coppet-mediated enantioselective substitution reactions, however, is still at an early stage.  [c.261]

See pages that mention the term CABD tools : [c.64]    [c.174]    [c.158]    [c.238]    [c.10]    [c.153]    [c.20]    [c.6]    [c.7]    [c.11]    [c.14]    [c.15]    [c.18]    [c.25]    [c.45]    [c.55]    [c.61]    [c.110]    [c.118]    [c.124]    [c.129]    [c.134]    [c.161]    [c.162]    [c.182]    [c.218]    [c.234]    [c.239]    [c.240]    [c.247]    [c.263]    [c.271]    [c.272]    [c.274]    [c.276]    [c.286]    [c.310]    [c.315]    [c.316]    [c.317]    [c.317]    [c.318]    [c.321]    [c.324]    [c.165]    [c.304]   
Industrial ventilation design guidebook (2001) -- [ c.5 , c.107 ]