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Complexation between macromolecules

EISHUN TSUCHIDA received the doctoral de ee at Waseda University in 1960 and has been a professor there since 1973. His research interests include the electron transfer process of macro-molecular-metal complexes oxygen carriers polymeric catalysts for redox reaction oxidative polymerization and chelating resins interaction and complexation between macromolecules and electro- and/or ionic-conductive macromolecules. He has published over 250 papers and has written or edited several books. He is a board member of the Society of Polymer Chemistry and the Chemical Society in Japan. [Pg.449]

Interactions between macromolecules (protems, lipids, DNA,.. . ) or biological structures (e.g. membranes) are considerably more complex than the interactions described m the two preceding paragraphs. The sum of all biological mteractions at the molecular level is the basis of the complex mechanisms of life. In addition to computer simulations, direct force measurements [98], especially the surface forces apparatus, represent an invaluable tool to help understand the molecular interactions in biological systems. [Pg.1741]

These results are simply explained in the patterns of Figure 9 in the compact complex, the marker (M) is wedged in between the polymer sequences and its mobility is low. In the gel-like structure the mobility of the marker is not affected, because the marker is mainly surrounded by sovlent molecules since the cross-linking between macromolecules is very low. Polarized luminescence results lead to confirmation of the complex structure proposed from visco-metry studies. [Pg.83]

It is the purpose of this article to discuss whether or not there are any differences between the chemical reactivity of a polymer-metal complex and that of the corresponding monomeric complex. Although various extensive investigations on polymer-metal complexes have been reported, most of these complexes are too complicated to be discussed quantitatively due to the nonuniformity of their structure. These compounds include not only complexes of macromolecules but also the structurally labile metal complex . Before detailed information can be obtained about the properties of polymer-metal complexes, and especially about the reactivity and catalytic activity of polymer-metal complexes, their structure must be elucidated. A polymer-metal complex having a uniform structure may be defined as follows ... [Pg.6]

Amino acids link together linearly to form proteins, nucleotides link linearly to form RNA and DNA, and sugars link in a more complicated way to form complex carbohydrates. The specific sequence in which these units link together to form the final polymeric macromolecule is called its primary structure. In a way that is still very ill-understood, the primary structure ultimately controls the macromolecule s three-dimensional structure and thereby largely determines its function. There is therefore great interest in analyzing primary structural information in order to detect similarities and relationships between macromolecules. However, as we shall see later, although similar primary structures imply similar three-dimensional structures, it is possible for three-dimensional structures to resemble each other without any sequence similarity. [Pg.76]

On the other hand, when rotational motion is slow, or when the symmetry of the complex is less than cubic, as in Mn2+ complexes with macromolecules, Au)Xr is often greater than one, the anisotropic interactions are incompletely averaged and EPR spectra similar to those for randomly oriented solid samples are observed. In these cases the spectra depend upon the angular relationships between the magnetic field vector and the crystal field axis of the ion. Moreover, when the symmetry of the manganese ion complexes deviate greatly from cubic, the EPR spectra depend upon the sharing of spectral intensity between the normal and forbidden (AMS = + 1, Amp = + 1) transitions. [Pg.51]

Tsuchida, E., and Abe, K. "Interactions between macromolecules in solution and intermacro-molecular complexes". Adv. Polym. Sci. 45, 1-119 (1982). [Pg.42]

The second type of nonideal models takes into account the possible formation of donor-acceptor complexes between monomers. Essentially, along with individual entry of these latter into a polymer chain, the possibility arises for their addition to this chain as a binary complex. A theoretical analysis of copolymerization in the framework of this model revealed (Korolev and Kuchanov, 1982) that the statistics of the succession of units in macromolecules is not Markovian even at fixed monomer mixture composition in a reactor. Nevertheless, an approach based on the "labeling-erasing" procedure has been developed (Kuchanov et al., 1984), enabling the calculation of any statistical characteristics of such non-Markovian copolymers. [Pg.185]

This article summarizes formation, properties and structure of intermac-romolecular complexes between synthetic macromolecules mainly and outlines their applications. [Pg.3]

Table 3. Formation of intermacromolecular complexes between synthetic macromolecules... Table 3. Formation of intermacromolecular complexes between synthetic macromolecules...

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See also in sourсe #XX -- [ Pg.45 , Pg.77 ]

See also in sourсe #XX -- [ Pg.45 , Pg.77 ]




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