Flexibility, monomeric

The majority of this matrix is composed of a protein called spectrin, a heterodimeric protein containing a 220-kDa a subunit and a similar but slightly larger /3 subunit. The highly repetitive amino acid sequences of both the a and /3 subunits give them a filamentous three-dimensional structure. As the a and /3 subunits of spectrin associate with one another, they form the flexible monomeric units that are used to create the membrane skeleton. 

Lynch WP, Riseman VM, Bretscher A (1987) Smooth muscle caldesmon is an extended flexible monomeric protein in solution that can readily undergo reversible intra-and intermolecular sulfhydryl cross-liitking. A mechanism for caldesmons F-actin bundling activity. J Biol Chem 262 74297437... 

Plasticizers. Monomeric (mol wt 250—450) plasticizers (qv) are predominantiy phthalate, adipate, sebacate, phosphate, or trimeUitate esters. Organic phthalate esters like dioctyl phthalate (DOP) are by far the most common plasticizers in flexible PVC. Phthalates are good general-purpose plasticizers which impart good physical and low temperature properties but lack permanence in hot or extractive service conditions and are therefore sometimes called migratory plasticizers. Polymeric plasticizers (mol wt up to 5000 or more) offer an improvement in nonmigratory permanence at a sacrifice in cost, low temperature properties, and processibiHty examples are ethylene vinyl acetate or nitrile polymers. 

Monomeric MDI Pure 4,4 -MDI 2.0 Solid (MP = 37 C) Flexible prepolymers Liquid 1-K adhesive Thermoplastic adhesives Curing hot melts Solvent-borne adhesives... 

As it has been shown lately, insertion of a small quantity (5—15% of the copolymer weight) of ISP monomeric units into the PAN macfomolecules results in an appreciable decrease of stiffness and in an increase of flexibility of the chain, which makes it possible to improve considerably the fatigue properties of usual PAN fibres30. In addition to that, by inserting a comparatively large amount (25—30%) of flexible ISP monomeric units into the copolymer one can decrease substantially the yield temperature of PAN, which makes it possible to spin fibres from thermoplastic state31. ... 

Rouse motion has been best documented for PDMS [38-44], a polymer with little entanglement constraints, high flexibility and low monomeric friction. For this polymer NSE experiments were carried out at T = 100 °C to study both the self- and pair-correlation function. 

The transitions of the coil-globule type were considered not only in the usual space, but also in the space of monomeric units orientation, where such transition is equivalent to the nematic liquid crystal ordering [60,61]. Such an approach using the formalism developed by I.M. Lifshitz has led to the creation of the theory of liquid crystal ordering in the solutions of semi-flexible macromolecules [62,63]. 

The coordinated macrocycle readily reacts with alkoxide ions to yield products of type (71) (Taylor, Urbach Busch, 1969). In so doing additional flexibility is imparted to the ring which may reduce ring strain and, in part, provide a driving force for the reaction. Thus the coordinated imine carbons appear predisposed to attack by such nucleophiles. Based on this knowledge, elegant template syntheses of three-dimensional derivatives have been performed. The syntheses involved the reaction of [M(taab)]2+ (M = Ni, Cu) with the dialkoxide ions derived from bis(2-hydroxyethyl)sulphide or bis(2-hydroxyethyl)methylamine (Katovic, Taylor Busch, 1969). The products were demonstrated to be monomeric square-pyramidal complexes of type (72). The condensation... 

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