Faster shipping methods may be available; just upgrade during checkout. Sales Tax B&H only collects sales tax on orders shipped to addresses in the States of New York and New Jersey.You may be responsible for state and local sales/use taxes when filing your tax returns. The Auto Extension Tube Set DG for Canon EOS Lenses from Kenko contains three tubes of different lengths--12mm, 20mm, and 36mm--which can be used individually or in any combination to obtain the desired magnification. Extension tubes are designed to enable a lens to focus closer than its normal minimum focusing distance.Thus it is not surprising that the selective binding of simple or functionalized (for example, branched methyl groups or unsaturated carbon–carbon double bonds) long hydrocarbon chains, essential components for biological function(a) Schematic representation of the binding of a long hydrocarbon by a molecular tube with polyaromatic frameworks.
They've adapted to thrive at the edge of hydrothermal vents, which spew superheated water saturated with toxic chemicals.This colony was photographed 1.5 miles (2.4 kilometers) below the ocean's surface on the East Pacific Rise near the Galapagos Islands.Students discuss how they and other organisms adapt to survive in different environments.Long hydrocarbon chains are essential components of biomolecules used for structure and function in living organisms.The selective recognition and effective binding of hydrocarbons within synthetic host compounds are problematic owing to their conformational flexibility and the lack of specific binding sites.