99 research outputs found
On the relationship between the solubility of proteins and the osmotic second virial coefficient
Gas-phase H/D exchange and collision cross sections of hemoglobin monomers, dimers, and tetramers
Binding of aldolase to actin-containing filaments. Quantitative reappraisal of the interactions
Gamma radiolysis of poly(acrylic acid) and poly(methacrylic acid)
The COOH group in poly(carboxylic acid)s is especially sensitive to radiation and its degradation can be measured by the formation of CO and CO. In the γ-radiolysis of poly(acrylic acid), PAA, and poly(methacrylic acid), PMAA, G(-COOH) has been found to be 8.4 at 77K and 12.1 at 300K for PAA, and 6.2 at 77K and 10.8 at 300K for PMAA, which are significantly higher than the values for low molecular weight aliphatic carboxylic acids where G(-COOH) is approx. 4-6 in the liquid state and even lower for low molecular weight acids in the solid state. Moreover, the ratio of CO:CO is much higher for the polymers (0.35 compared with 0.1). These observations suggest that the degradation proceeds by a somewhat different mechanism in the poly(acid)s. Radical intermediates at 77 and 300K were identified and their yield measured using electron spin resonance spectroscopy. The mechanism for degradation of carboxylic groups is believed to proceed via both cationic and anionic radicals and we suggest that the pathway through the anion radical may be more important in the polymers and that excited states play a significant role
Effects of Cross-Linking on the Morphology of Structured Latex Particles. 2. Experimental Evidence for Lightly Cross-Linked Systems
The Effect of Intermediates upon the Transport Properties of Polymerizing Systems. I. Monomer, Trimer, and Nonamer *
Correction - The Role of Sulfhydryl Groups in the Catalytic Function of Isocitrate Dehydrogenase. I. Reaction with 5,5'-Dihiobis(2-nitrobenzoic acid)
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