Efficiency of encapsulation

Upon the spontaneous rearrangement of anhydrous phospholipids in the presence of water into a hydrated bilayer structure, a portion of the aqueous phase is entrapped within a continuous, closed bilayer structure. By this process water-soluble compounds are passively entrapped in liposomes. The efficiency of encapsulation varies and depends, for example, on the method of preparation of liposomes and the phospholipid concentration during preparation. Different parameters can be used to describe the encapsulation efficiency ... 

Efficiency of encapsulation amount of the encapsulated compound divided by the total amount added to the preparation. 

Al-Ghamdi GH, Sudol ED, Dimonie VL, et al. (2006) High PVC film-forming composite latex particles via miniemulsification, part 2 efficiency of encapsulation. J Appl Polym Sd... 

When comparing the time scales of transport of material to the hollow capsule interiors, the efficiency of encapsulation arising from assembly schemes featuring in situ encapsulation should be higher than for hollow structures formed by core-shell dissolution. Time requirements should be higher for hollow capsules contacted in a solution of material to be encapsulated, particularly when material transport is based on kinetically driven diffusion or absorption processes, as compared to an in situ encapsulation scheme. In the case of material transport governed by a thermodynamic phenomenon such as partitioning, the equilibrium quantity of material that needs to be transported across the shell will be dependent on the partition coefficient of the shell with respect to the material to be encapsulated [13,32-35,80-83]. 

Using less water-soluble monomers in combination with a nonionic initiator, the formation of surface-active oligomers in the aqueous phase can be minimized, thus increasing the efficiency of encapsulation. 

In a previous article related with the addition of cellulose derivatives to sodium alginate prior to microbead formation, Chan et al. [131] observed that efficiency of encapsulation of a model drug (sulphaguanidine) and its release profiles were strongly dependent on the hydrophilicity of the cellulose derivatives used and the... 

The effect of monomer conversion on the efficiency of encapsulation is observed by carrying out experiments using diaminophenylene as initiator in order to obtain a low conversion (53-76%). It has been observed that at lower conversion HD - irrespective of the loading amount - is not completely encapsulated by poly(St-co-DMAEMA). 

Thermally conductive materials can conduct heat away from devices into a heat sink or the surrounding air and extend product life. Thermal conductive ETP can increase the electrical efficiency of encapsulated motors by lowering the operating temperature, resulting in more power and torque and longer device life than hotter-running devices. 

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