Protein colloids

This method is used mainly to remove high-molecular-weight materials such as proteins, colloids, viruses, and bacteria. The same types of problem encountered with the use of reverse osmosis membranes are encountered here, and the proposed solutions are the same. 

KEY TERMS intermolecular forces proteins colloidal dispersion... 

Norde W, Favier JP (1992) Structure of adsorbed and desorbed proteins. Colloids Surf 64 87-93... 

Tuinier, R., Dhont, J.K.G., de Kruif, C.G. (2000). Depletion-induced phase separation of aggregated whey protein colloids by an exocellular polysaccharide. Langmuir, 16, 1497-1507. 

Marinova, K., Gurkov, T., Velev, O., Ivanov, I., Campbell, B., Borwankar, R. (1997). The role of additives for the behaviour of thin emulsion films stabilized by proteins. Colloids and Surfaces A Physicochemical and Engineering Aspects, 123-124, 155-167. 

Izmailova, V.N., Yampolskaya, G.P., Tulovskaya, Z.D. (1999). Development of Reh-binder s concept on structure-mechanical barrier in stability of dispersions stabilized with proteins. Colloids and Surfaces A Physicochemical and Engineering Aspects, 160, 89-106. 

Fractionation of milk and titration of the fractions have been of considerable value. Rice and Markley (1924) made an attempt to assign contributions of the various milk components to titratable acidity. One scheme utilizes oxalate to precipitate calcium and rennet to remove the calcium caseinate phosphate micelles (Horst 1947 Ling 1936 Pyne and Ryan 1950). As formulated by Ling, the scheme involves titrations of milk, oxalated milk, rennet whey, and oxalated rennet whey to the phenolphthalein endpoint. From such titrations, Ling calculated that the caseinate contributed about 0.8 mEq of the total titer of 2.2 mEq/100 ml (0.19% lactic acid) in certain milks that he analyzed. These data are consistent with calculations based on the concentrations of phosphate and proteins present (Walstra and Jenness 1984). The casein, serum proteins, colloidal inorganic phosphorus, and dissolved inorganic phosphorus were accounted for by van der Have et al (1979) in their equation relating the titratable acidity of individual cow s milks to the composition. The casein and phosphates account for the major part of the titratable acidity of fresh milk. 

This newly fermented wine is cloudy from suspended materials such as yeast, protein, colloids, and fine grape cellular solids. In storage, a natural clarification, or gravity settling out, of these materials takes place. 

I. F. Mironyuk, V. M. Gun ko, V. V. Turov, V. I. Zarko, R. Leboda, and J. Skubiszewska-Zifba, Characterization of Fumed Silicas and their Interaction with Water and Dissolved Proteins, Colloid. Surf. A 180, 87-101 (2001). 

Radford, S.J., and Diekinson, E. (2004). Depletion floeeulation of easeinate-stabilised emulsions what is the optimum size of the nonadsorbed protein Colloids Sutf. A. 238, 71-81. 

Pol3aners and their effects on colloid stability Polyelectrolytes and their effects on colloid stability Proteins (colloidal aspects)... 

Influent concentrations and residual concentrations of cationic surfactants, anionic surfactants, cationic polyelectrolyte, anionic polyelectrolyte, proteins, colloids, oxygen, ozone, detergents, suspended sohds, and so on, in the adsorptive bubble separation systems can be determined by the analytical methods reported in the literature (82,127-149). 

Flux decays and rejection changes in the UF steps, depending upon the feed concentration and experiment history, must be mainly attributed to concentration polarization phenomena with consequent gel layer formation of the pressurized membrane surface, for the presence of proteins, colloids and in general high molecular species in the feed (3). 

In a previous paper Bancroft and Rutzler reported on the experimental application of the Claude Bernard theory of anesthesia it was shown that sodium thiocyanate can relieve ether, amytal, and morphine anesthesia by peptizing the reversibly coagulated protein colloids of the central nervous system. Sodium thiocyanate was chosen because it peptizes proteins strongly and stands at the head of the lyotropic series of anions in this respect. The lyotropic series for egg albumin appears to be as follows CNS > I > Br > CIO3 > NO3 > Cl > CH3COO > SO4 > tar-... 

In the second case treated by MacLeod a victim of morphinism and alcoholism was cured of addiction to both simultaneously by the use of great amounts of sodium bromide. The next case was that of a patient who used chloral habitually the patient was kept asleep for eight days by the use of sodium bromide. At the end of the treatment the sufferer was ctued. Chloral, being a well-known anesthetic, acts by agglomerating reversibly the protein colloids of the brain and of the sensory nerves the action of the sodium bromide in this case was to disperse the agglomerated protein particles in the same way that it acted to cure morphinism. This establishes an experimental parallelism between the action of morphine and chloral, and the action of sodium bromide in antagonizing them both. 

Bos MA, Shervani Z, Anusiem ACI, Giesbers M, Norde W, Kleijn JM. Influence of the electric potential of the interface on the adsorption of proteins. Colloids Surfaces B 1994 3 91-100. 

Petit F., Audebert R., Iliopoulos I. Interactions of hydrophobic ally modified polyfsodium acrylate) with globular proteins. Colloid Polym. Sci. 1995 273 777-781. 

Characterisation of kinetics of protein colloidal micellar dissociation has been carried out using high pressure turbidity and high pressure light scattering measurements. [36] Flow and so-called jump methods will be described in more detail below. 

Protein colloids contain larger molecules and have a longer intravascular residence time than crystalloids, but eventual fluid loss to the extravascular space does occur. Protein colloids, such as albumin and PPF, are prepared from pooled human blood and, therefore, carry with them a risk of transmission of viral infection or induction of anaphylaxis. The PPF is a 5% mixture (5 g of protein in 100 ml of 0.9% NaCI solution) of proteins that is osmotically equivalent to human plasma. The composition of the protein mixture is 83 to 90% albumin. Albumin typically is administered as either a 5 or 25% solution. By definition, albumin preparations must be composed of a protein mixture that is more than 90% albumin. Generally, PPF is favored over albumin for fluid resuscitation, because albumin appears to cause more interstitial edema. 

Ikomi F., Hunt J., Hanna G. et al. 1996. Interstitial fluid, protein, colloid and leukocyte uptake into interstitial lymphatics. J. Appl. Physiol. 81 2060. 

Three-dimensional structure of wine tannin-salivary protein colloidal complexes... 

Chem. Descrip. 3,5-Dimethyltetrahydro-1,3,5,2FI-thiadiazine-2-thione CAS 533-74-4 EINECS/ELINCS 208-576-7 Uses Bactericide, antimicrobial, fungicide, preservative for aq. systems, adhesives, food pkg. adhesives/paper, dispersed colors, resin emulsions, powd. joint cements, protein colloids, architectural coatings, textile processing sol ns. 

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