Aggregation Experiments

Hematite suspensions were equilibrated at various defined pH, salt, and fulvic acid concentrations for 17 hours with stirring at 220 rpm prior to membrane filtration. 

Prior to use, the membranes were soaked in 0.1 M NaOH for 30 minutes and flushed with 3.4 L of MilliQ water in order to remove the preservative glycerin. The experiments were conducted with transmembrane pressures in the range of 0 to 300 kPa and a temperature of 25°C. The stirring speed in most experiments was set to 520 rpm. The feed volume was inserted into the stirred cell from two reservoirs (about 1.5 L) connected in series as shown in Chapter 4. 

---

Table 2.3 Parameters used for the discription of dissolution and remineralisation in HAMOCC5 in the aggregation experiment (AGG) and the satellite data assimilation experiment (SAT).

PS vesicles. In addition, we present the results of fluorescent probe leakage experiments which together with the aggregation experiments enable us to draw some conclusions on the mechanism of fusion of PS vesicles. 

Rate of growth/aggregation experiments with SAXS... 

Our hypothesis that GMP is a particle network was confirmed by re-disper-sion and re-aggregation experiments. Clear differences between particles could be observed. These differences are possibly related to difference in HMWGS composition and help explain differences in G plateau values for GMP. 

Experiments were carried out in the presence of electrolyte solution and pH 8 (in this case to provide a baseline for the aggregation experiments with organics). The rejection of the 75 nm colloids was complete, as shown in Table 5.3 (no 3). Figure 5.4 shows that after a egation the flux ratio is high... 

We define Collective Experience of Inclusion (CoUecfive EOI) as the overall or additive sense of the extent to which people in a group feel accepted, engaged, safe, and valued—essentially the aggregated experience of inclusion across all individuals in a group. ... 

For the aggregation experiments distilled water and glass microbeads (Supelco, 75 5 nm diameter, 2,500 kg m" density) were used. The surface of the glass beads was rendered hydrophobic by... 

Figure 6.4. Aquarium used for aggregation experiments. Chemical cues left on papers under the shelters can be moved to different shelters to test for aggregation tendencies to pheromones. Redrawn from Heller and Halpem (1982a).

Kim T et al (2008) Kinetics of gold nanoparticle aggregation experiments and modeling. J Colloid Interface Sci 318 238-243... 

Fig. 7. Schematic representation of the different cases studied in the aggregation experiments (a) charged spheres with counter-ions (b) magnetized spheres with moment p (c) magnetized spheres in ferrofluid (arrows represent moments on ferrofluid particles) (d) nonmagnetic spheres in ferrofluid with an external field producing a magnetic moment (magnetic hole). ...

FIGURE 13.2 Adsorption isotherms of BSAm (open circles) and BSAp (solid circles) on polystyrene particles. BS Aadd and BSA j give the added and adsorbed amount of BSA molecules normalized by the total available particles surface. The arrow-marked points correspond to the samples employed for the aggregation experiments. 

---