What is a colloidal dispersion and how to measure its stability?

jan 22 2020

A colloidal dispersion is composed of solid, liquid or gas particles dispersed in a continuous phase (solid, liquid or gas). Strictly speaking, the term colloidal refers to particles with at least one dimension ranging from 1nm to 1µm. Most commonly encountered colloidal dispersions are solid-liquid (suspensions), liquid-liquid (emulsions), gas-liquid (foams), and solid-gas (aerosols) dispersions.

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Testing THC edibles: The Importance of stability testing in the cannabis field

aug 28 2019

Recently, the legalization of cannabis-infused edibles has been passed by several states in the U.S. Later this year, cannabis-infused edibles will be for sale in Canada, though Quebec has announced it will ban most edibles. This may be news to some as the legalization and sale of cannabis leaf and extracts are handled differently than that of a formulated edible. Whether for recreational or medicinal-use edibles impose new kinds of problems as the processed consumables possess different bioavailability and uptake routes in the body, leading to longer onset times and overdose potential when compared to standard inhalation methods. Label claims need to be met and verified in terms of potency testing and overall safety to the consuming public. Up to this point, testing has not generally been universally regulated due to the absence of a universal governing body to implement standards of what needs to be tested and what levels of accuracy are valid, leading to a wide range of quality within products. Many say that global legalization will actually allow for the expanded research of these drugs and their safety to the public, something that has obviously been difficult to do.

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Metalworking Fluids (MWF): Overcoming Stability Issues

aug 19 2019

Metalworking fluids (MWFs) are a family of industrial liquids used to reduce the temperature of and/or lubricate metal workpieces while they are being machined. Cutting and grinding processes can generate significant amounts of heat and friction, which can cause undesirable thermomechanical side-effects: burning, deformation, smoking, surface roughness, thermal warping, etc. If a workpiece burns it may be rendered unfit for downstream application, while off-gases and smoke represent a respiratory health risk for personnel. The thermomechanical drawbacks of conventional metalworking can represent logistical and health and safety issues if not addressed. 

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cosmetics shelf life prediction

Cosmetic emulsions: Next generation shelf life study towards formulation stability prediction

jul 24 2019

Cosmetic emulsions and suspension formulations are carefully researched and rigorously tested so that the advertised beneficial properties of the product are effectively passed along to the consumer. The image of a company and the notoriety of a brand are reflected by the quality of the formulation and by the consumer response to and review of the product that they purchased. However, with all the testing that can be done in an R&D or QC setting, in laboratories or factories, it is still difficult  to project the efficacy and performance of a product once it is in consumer’s hands. This poses a problem as there is a certain amount of time that elapses from the time of packaging to consumption. This  can range from weeks to months over a period of shipping, warehouse, and shelf storage.

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