Coagulation effects

Either the Mohr titration or the adsorption indicator method may be used for the determination of chlorides in neutral solution by titration with standard 0.1M silver nitrate. If the solution is acid, neutralisation may be effected with chloride-free calcium carbonate, sodium tetraborate, or sodium hydrogencarbonate. Mineral acid may also be removed by neutralising most ofthe acid with ammonia solution and then adding an excess of ammonium acetate. Titration of the neutral solution, prepared with calcium carbonate, by the adsorption indicator method is rendered easier by the addition of 5 mL of 2 per cent dextrin solution this offsets the coagulating effect of the calcium ion. If the solution is basic, it may be neutralised with chloride-free nitric acid, using phenolphthalein as indicator. 

The anti-coagulation effect of coumarin derivatives is enhanced... 

Alcohols and acetone are the simplest kinds of membrane permeabilization agents. They act by dissolving membrane lipids, thus rendering the membrane permeable to antibodies (5). Because of their coagulant effects on proteins, these solvents can be used as a one-step fixative and permeant (18). 

Immediate coagulant effect should not be expected. It takes a minimum of 1 to 2 hours for a measurable improvement in the PT. 

Drugs That Decrease Oral Coagulant Effects ... 

Coagulative effect. Permixon, administered to 108 patients at a dose of 320 mg/ day for at least 8 weeks before the procedure of transurethral resection of prostate, produced significantly lower bleeding than in the control (124 vs 287 mL, respectively), and the need of transfusion decreased remarkably. The duration of postoperative catheterization (3 vs 5 days, respectively) and the evaluated hematological parameters (red cells 4.5 vs 4 million, hemoglobin 13.4 vs 11.9 g, hematocrit 40 vs 35%) were significantly lower than in the control group . 

Pour 2 ml of the prepared colloidal iron hydroxide solution into each of several test tubes and add 2 ml of one of the following solutions of the same normality (0.1 N) to each of them sodium chloride, barium chloride, aluminium chloride, sodium sulphate, aluminium sulphate, or monosubstituted sodium orthophosphate. What do you observe How does the coagulating effect of an electrolyte depend on the sign and magnitude of the charge of its ions ... 

Coagulation Effects. Matijevic and co-workers have shown that in optimum cases the effect of hydrolyzed metal ions upon the coagulation and reversal of charge of lyophobic colloids can be useful in identifying... 

UFH All PCI Dose of UFH more predictive of complications than AST value (46) Variable anticoagulant effect (needing monitoring), platelet activation causing paradoxical pro-coagulant effect, HIT, unable to bind clot-bound thrombin (8,44)... 

I. M. Metcalfe and T. W. Healy, Charge-regulation modeling of the Schulze-Hardy rule and related coagulation effects, Faraday Discuss. Chem. Soc. 90 335 (1990). 

Boye, B., Dieng, M. M. and Brillas, E. (2003b) Electrochemical degradation of 2,4,5-trichlorophenoxyacetic acid in aqueous medium by peroxi-coagulation. Effect of pH and UV light. Electrochim. Acta 48,781-790. 

To study the effect of electrolytes, sols of several concentrations were also used (150, 300, 750, and 1500 mg/1), and the experiments were made at various controlled values of pH (2, 4, 6, 8, and 10). A special series of experiments in a neutral medium (pH = 6) was conducted separately to compare the coagulating effect of the individual ions of sea water. From the preliminary results of these experiments, the following conclusions can be drawn ... 

The coagulating effect of electrolytes increases as the reaction of the medium changes from acid to slightly alkaline. 

The coagulating effect of electrolytes is produced by cations, the relative effectiveness of which increases in the order Na -Ca -Mg. Figure 51 shows as an example the dependence of completeness of coagulation of a silica sol in an almost neutral solution (pH = 6) on the concentra-... 

Study design N Source of subjects Drug Coagulation effect Reference... 

The establishment of hydrolysis equilibria is usually very fast, as long as the hydrolysis species are simple. Polynuclear complexes are often formed rather slowly. Many of these polynuclear hydroxo complexes are kinetic intermediates in the slow transition from free metal ions to solid precipitates and are tlius thermodynamically unstable. Some metal-ion solutions age, that is, tliey change their composition over periods of weeks because of slow structural transformations of the isopoly ions. Such nonequilibrium conditions can frequently be recognized if the properties of metal-ion solutions (electrode potentials, spectra, conductivity, light scattering, coagulation effects, sedimentation rates, etc.) depend on the history of the solution preparation. 

Norred CL, Brinker F. Potential coagulation effects of preoperative complementary and alternative medicines. Alt Ther 2001 7(6) 58-67. 

Dumont and Watillon [58] plotted coagulation concentrations of different anions as a function of pH and extrapolated the linear segments obtained for the anions having the lowest coagulation effect (high CCC) to intersect the pH axis. The pH value at intersection was claimed to be the PZC. Similar plot for cations did not confirm this result. 

BROWNIAN COAGULATION EFFECT OF PARTICLE FORCE FIELDS... 

Brownian Coagulation Dynamics of Discrete Distribution for an Initially Monodisperse Aerosol 192 Brownian Coagulation Effect of Particle Force Fields 196 Effect of van der Waals Forces 197 Effect of Coulomb Forces 200 Collision Frequency for Laminar Shear 200 Simultaneous Laminar Shear and Brownian Motion 202 Turbulent Coagulation 204... 

It should now be apparent why Mercury is so often called Water of Sulphur, or a Sulphur containing Sulphur, the Igneous. It is naturally also the Thick Water from which Fire is taken, while because of the coagulating effect of the Sulphur it is Permanent Water, which both Mundus, in the Turba, and Zozimus identify as Gum, while Zimon adds that it is a spirit concealed in the body. 

The coagulation-dispersion behavior of aqueous silica sols is central to almost all processes requiring their unique adsorption, dispersion, gelation, and sol-gel properties. Aqueous silica sols are of particular interest in colloid science because their coagulation-dispersion behavior is said to be anomalous , that is, their stability in terms of electrolyte-pH control does not follow the pattern followed by almost all other oxide and latex colloidal materials. This chapter examines aqueous silica sol coagulation effects in light of studies of macroscopic silica-water interfaces and in particular the electrical double layer at such interfaces. 

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