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Soluble aggregates

Examinations of the connection between the chemical structure of alkylaryl sulfates and their physical-chemical properties show that solubility, aggregations and adsorption behavior, foam behavior and consistency are determined by the following structural elements the length of the alkyl chain, the position at which the benzene ring is connected to the alkyl chain, and the substitution pattern of the benzene ring [187,188]. [Pg.88]

Shifts in pKa can also be expected if water-soluble aggregates form from the uncharged monomers. This may be expected with surface-active molecules or molecules such as piroxicam [500]. Consider the case where no DMSO is present, but aggregates form, of the sort... [Pg.112]

Adequate permeability pKa, solubility, aggregation mechanisms testing in animals ... [Pg.20]

There is much indirect evidence that the above hypothetical mechanism fits the behavior of the soy proteins. Wolf and Tamura (2), while studying the heat denaturation of native IIS soy protein, found that soluble aggregates are formed prior to the formation of insoluble precipitates. They proposed the following mechanism to explain their results. [Pg.94]

Catsimpoolas et al. (2) and Hermansson ( ) have found that the reaction leading to formation of the soluble aggregates is reversible. Recently, Takagi et al. ( ) found that hydrophobic interactions are primarily responsible for the formation of the soluble aggregates which are subsequently irreversibly insolu-bilized through intermolecular disulfide bond interchange. [Pg.94]

Surface active materials may not display a solubility because they form micelles in solution, which are essentially soluble aggregations of the pure substance. [Pg.148]

Figure 19 The definition of DP (left) and the results for several complexes based on CA M (right). Hub(M)3 and Flex(M)3 are discussed in the section on soluble aggregates Ad(M)3 I and Ad(M)3 II are similar to Hub(M)3, the primary difference is that adamantane instead of benzene is the central hub in the tripod [55]. The results from molecular dynamics (circles) and minimization calculations (squares) are shown... Figure 19 The definition of DP (left) and the results for several complexes based on CA M (right). Hub(M)3 and Flex(M)3 are discussed in the section on soluble aggregates Ad(M)3 I and Ad(M)3 II are similar to Hub(M)3, the primary difference is that adamantane instead of benzene is the central hub in the tripod [55]. The results from molecular dynamics (circles) and minimization calculations (squares) are shown...
Protein solubility is a thermodynamic characteristic of the protein/solvent system dehned as the concentration of soluble protein in equilibrium with the solid phase at a given pH, temperature, and solvent composition (Flynn, 1984 Arakawa and Timashelf, 1985 Middaugh and Volkin, 1992). For practical purposes, solubility of proteins can be dehned as the maximum amount of protein that remains in a visibly clear solution (i.e. does not show protein precipitates, crystals, gels, or hazy soluble aggregates), or does not sediment at 30,000 g centrifugation for 30 min (Schein, 1990 Ducruix and Reis-Kautt, 1990). [Pg.342]

Lipoproteins complexes are soluble aggregates of lipids and proteins that transport lipids through the blood and lymph. Despite their differences in lipid and protein composition, all lipoproteins share common structural features, notably a spherical shape that can be detected by electron microscopy. The lipoproteins help maintain in solubilized form some 500 mg of total lipid per 100 mL of human blood in the postabsorptive state, after the contents of a meal have been digested and absorbed into the bloodstream. [Pg.1667]

Mori, T. T. Nakamura S. Utsumi. Gelation mechanism of soybean IIS globulin formation of soluble aggregates as transient intermediates. /. Pood Set. 1982, 47, 26-30. [Pg.269]

Under conditions in which the proteins are macroscopically soluble, aggregation into fibers often occurs as the forerunner of precipitation ... [Pg.199]

The most common HPLC solvents used for LC NMR are acetonitrile and water. Both protonated and deuterated acetonitrile and water are commercially available and routinely used, where cost is a major consideration in minimizing the utility of deuterated solvents in HPLC experiments. Commonly, a low percentage of trifloroacetic acid (TEA) is also added to the HPLC solvent system to improve the LC peak lineshape. In some cases, a methanol water solvent mixture replaces the water-acetonitrile system if the compound of interest does not behave well (low solubility, aggregation, broad peak shape). If an MS system is attached to the LC-NMR to monitor the molecular weight than formic acid is preferred as a modifier. Table 12.9 provides a Kst of commonly used hyphenated techniques and their advantages and disadvantages. [Pg.389]


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See also in sourсe #XX -- [ Pg.36 ]




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Aggregation solubility

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