Molecular trench

Kuroda et al. have reported a porphyrin-based molecular trench (Figure 74) with highly complementary binding sites for tartaric acid dialkyl esters showing association constants as high as 10 M [100]. 

Mechanical removal of adsorbates offers an alternative approach that also avoids all of the complications and expense associated with electron beam lithography. At elevated loads, an AFM tip may be used to physically displace alkylthiolates from a SAM, resulting in the formation of a molecular trench without removal of the underlying gold atoms (Figure 11). If the operation is carried out under an ethanolic solution of a second thiol, then the scratch... 

Vapor Density The ratio of the density of any gas or vapor to the density of air, under the same conditions of temperature and pressure that is, a measure of how heavy the vapor is in relation to the same volume of air. Air is considered to have a molecular weight of 1. As an example, the higher the vapor density is in relation to 1.0, the longer it will persist in low-lying areas such as valleys, trenches, and cellar holes. If the vapor pressure is less than 1, a chemical agent would will likely be non-persistent and dissipate quickly into the atmosphere. 

Fig. 11.1. Two predicted binding conformations of an HIV-1 integrase inhibitor to a molecular dynamics (MD) snapshot of the protein. The green conformation is similar to that in the crystal structure and the magenta is in a secondary predicted binding trench that opened during an MD simulation of the protein [24]...

Kato, C. (1999). Molecular analyses of the sediment and isolation of extreme barophiles from the deepest Mariana Trench. In Extremophiles in Deep-sea Environments, ed. 

Kang H, Katoh T, Lee M, Park H, Paik U, Park J. Effect of molecular weight of surfactant in nano ceria slurry on shallow trench isolation chemical mechanical polishing (CMP). Jpn J Appl Phys 2004 43 L1060. 

Sweadr>er. K.J. (1993) Multiple digitalis receptors A molecular perspective. Trench Cardiovasc. Med.. 3.2-6. 

Trench, R. K. Cellular and molecular-interactions in symbioses between dinoflagellates and marine-invertebrates, Pwre AppZ. Chem., 53, 819, 1981. 

Blank, R. J. and Trench, R. K., Speciation and symbiotic dinoflagellates, Science, 229, 656, 1985. Rowan, R. and Powers, D. A., A molecular genetic classification of zooxanthellae and the evolution of animal-algal symbioses, Science, 251, 1348, 1991. 

Recently, Chiang et al. produced microtrenches on substrates and studied the molecular stacking of triphenylene discotic molecules on the substrate [193]. They demonstrated that the discotic molecules in the trenches can assemble into uniaxially aligned columns (Fig. 7.14). The way in which the discotic molecules anchor on the walls of trenches and the over all orientation of the columns are determined by the energetic conditions of the walls. They show that the orientation direction of the columns can be controlled to align either parallel or perpendicular... 

Fig.13 a Molecular structure of 26. b, d Constant-current STM images (10.5 x 6.9 nm ) on Cu(llO) under UHV conditions, b 26 double-row structure. The trenches in the underlying surface are sketched, c Ball model of the double-row structure. The substrate atoms are shaded darker the deeper the layers lie. The molecules are shown in gray. d The trenches in the surface layers are disclosed after manipulating the molecules aside. (Reproduced with permission from Ref. [70])... 

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