PHARMACEUTICAL SUSPENSIONS AND EMULSIONS
The electrostatic method places an ionic charge at the surface of particles that results in mutual repulsion. For maximum stability the electrostatic force of repulsion should be as large as possible, i.e., the particle surface charge should be as large as possible. The force of repulsion becomes smaller as the ionic strength of the medium increases. Thus, the lowest electrolyte concentration possible should be used. This is problematic for many pharmaceutical formulations that tend to be isotonic with blood, i.e., they have a very high ionic strength.
How PVC is manufactured
PVC production usually refers to the manufacture of PVC resin, which is the basis for the plethora of PVC products around us. Three types of PVC manufacture exist: suspension polymerisation, emulsion polymerisation and bulk polymerisation. PVC made from suspension is by far the most common.
This PVC production process is explained in this video:
We have conventionally referred to a finely chopped meat mixture as a meat emulsion. This is somewhat a misnomer as the so-called meat emulsion consists of solid fat particles dispersed in a liquid continuous phase. It might be more appropriate to refer to this mixture as a meat batter. However, for the remainder of this presentation, we will use meat emulsion.
Gelation of Soy Milk with Hagfish Exudate Creates a Flocculated and Fibrous Emulsion- and Particle Gel
A Schematic illustration of the components in hagfish slime. Hagfish exudate is expelled from ventro-lateral pores. Upon contact with water, the thread skeins unravel to long fibers and the vesicles swell, rupture, and mucin strands are formed. The fibers and the mucin together form the slime. B Soy protein isolate suspension. C Soy milk.
What is the difference between suspension, emulsion and colloidal solution?
A suspension is a heterogeneous mixture of solid particle in carrier liquid. It is not dissolved it is suspended. The emulsion is the mixture of two or more immiscible liquids. E.g. Water and oil, soap and water. A colloidal solution is the mixture of sub micronic particles in carrier liquid.The particles are kept in suspension through brownian motion.
Polymers have become increasingly popular drug delivery vehicles in the last several decades for applications ranging from targeted tumor therapy1 to modulation of the immune system2. Polymer-encapsulated or conjugated drugs are frequently more effective than their freely delivered counterparts, since polymer-associated drug is protected from degradation. This protection translates to a longer biological half-life and potentially improved efficacy with reduced systemic side effects3-5.
Ointments suspension and emulsion (UNGUENTA) – PowerPoint PPT Presentation
Ointments suspension and emulsion (UNGUENTA). Author: as. Yu.Yu. Plaskonis. Ointments – suspensions are ointments, in the complement of which medicinal matters enter soluble neither in basis nor in water.
Liquid Dosage Forms
Liquid state forms are meant for internal, parental or external use. They are available in monophasic and biphasic forms. Monophasic liquid dosage forms are true or colloidal solution. Water is mainly used as a solvent for majority of monophasic liquid dosage forms. The liquid which consists of two phases are known as biphasic liquids.