Promoter mobile

Kollet O, Dar A, Shivtiel S et al. Osteoclasts degrade endosteal components and promote mobilization of hematopoietic progenitor cells. Nat Med. 2006 12 657 664. 

FIGURE 16.11 Schematic representation of eluent gradient polymer HPLC. Two polymer species A and B are separated. They exhibit different nature and different interactivity with the column packing (e.g., adsorp-tivity) or with the mobile phase (solubility). The linear gradient from the retention promoting mobile phase to the elution promoting mobile phase is applied. The focused peaks—one for each polymer composition/ architecture—are formed in the appropriately chosen systems. Each peak contains species with different molar masses. 

Water and hydroxyl ion are the classic mineralisers in hydrothermal synthesis, firstly because aqueous alkali dissolves amphoteric oxides and so promotes mobility and mixing of molecular and ionic species as a pre-requisite for reaction. A second vital role is that of molecular water which (see below) stabilises aluminous zeolites by filling channels and cavities. This role can be shared or taken over by organic molecules (e.g. in porosils, silica-rich zeolites or AlPO s), and by salts (e.g. in scapolites, sodalite and cancrinite). 

In nearly all pot culture experiments, the presence of a chelator increased the uptake of Pu and Am by plants (33, 34, 3 , 36). The chelator likely favors mono-dispersed Pu forms and affects sorption of the elements to the solid soil phase. Because the chelator tends to promote mobility, it enables a greater fraction of the actinide to be assimilated by roots. The chelator is also able to complex soil Am directly and increase its uptake by plants (36). 

Scheme 2. (1) CO-induced reductive agglom-eration/oxidative disruption of Rh particles on oxide supports (2) OH-promoted mobility of disrupted species on the support. (Dictor 1988, Dictor and Roberts 1989, Solymosi and Pasztor 1985, Solymosi et al. 1988.)...

Parathyroid hormone, a single chain polypeptide hormone with 84 amino acid residues, regulates the calcium ion concentration in the extracellular fluid by promoting mobilization of calcium from bone. The biological activity resides in the first 34 residues, and hormones from bovine, porcine, and human sources cross-react with the same antibody. 

One method to produce a more thermodynamically stable state is annealing of the polymer film. This promotes mobility of the polymer chains and allows them to coalesce into larger domains. For this system, solvent annealing was chosen over thermal armealing, in an effort to minimize the thermal exposure of the chemical bond between the SAMs and the gold substrate, which may lack stability at elevated temperatures. Toluene is a well-known solvent for PS and was chosen as the annealing solvent. 

The important advantage of LC LC procedures that utilize controlled volume barriers lies in the high sample recovery. This is rather comprehensible because the pores of the colunm packing ate in a continuous equilibrium with the elution promoting mobile phase. The equihbrium is likely perturbed only within the pore orifices in the course of the brief contact of the colunm packing with the retention promoting barrier. 

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