Recent in Chemistry (page 8 of 19)

Comparatively Speaking: Linear vs. Branched vs. Dendrimer Polymer Structures

Industry expert Tony O'Lenick explains the difference between polymer structures, the simplest being a linear chain with a single backbone, then increasing in complexity with one or more side chains or branches. Special types of branched polymers include dendrimers.

Comparatively Speaking: Cofactors vs. Coenzymes

Enzymes for DNA repair or Coenzyme Q10 for antioxidant and antiaging benefits have become typical ingredients in today's skin care. Here, industry expert O'Lenick illustrates the difference between cofactors and coenzymes.

Comparatively Speaking: Emulsion vs. Colloid

Industry expert Anthony O'Lenick, Jr., explains the different between an emulsion and a colloid.

Comparatively Speaking: Fatty Acids vs. Ozone Acids

Industry expert Tony O'Lenick describes the differences between the formation of fatty acids by saponification followed by acidulation, and ozone acid by the reaction of unsaturated acids with ozone.

Strong, Self-healing Hydrogel Created for Tissue Engineering

Researchers from the University of Tokyo have created a strong, self-healing hydrogel with applications in tissue engineering and drug delivery. The material incorporates a binder made from long chains of polyethylene glycol, an ingredient commonly used in skin care.

Comparatively Speaking: Proteins vs. DNA vs. Sugars

Industry expert Tony O'Lenick discusses the structural differences between the biopolymers DNA, sugars and proteins, which are all important to life but function differently in the cell and in cosmetic products.

Comparatively Speaking: Radical vs. Ring-opening Polymerization

Industry expert Tony O'Lenick discusses the differences in chemistry between radical polymerization and ring-opening polymerization.

Comparatively Speaking: Compounds vs. Compositions

The difference between a compound and a composition has a dramatic effect upon the ability to formulate. The vast majority of raw materials used in formulations are not compounds, but rather complex mixtures called compositions.

Comparatively Speaking: Static vs. Dynamic Measurement of Surface Tension

Surface tension determines the properties of formulations. How does one measure surface tension? Since, realistically, there is more than one surface tension in a liquid, measurements can vary depending upon the method used. Here, industry expert Tony O'Lenick discusses static and dynamic approaches to measuring surface tension.

Comparatively Speaking: Isotactic vs. Syndiotactic vs. Atactic in Polymers

Anthony J. O'Lenick, Jr., asks Thomas O'Lenick, a doctoral candidate in polymer chemistry at the University of Tennessee, to explain the difference between isotactic, syndiotactic and atactic polymers.

Comparatively Speaking: Humectants vs. Emollients vs. Occlusive Agents

Tony O’Lenick asks industry expert Kelly Dobos of Kao Brands to explain the difference between humectants, emollients and occlusive agents.

Comparatively Speaking: Dimethicone/Vinyl Dimethicone Copolymer vs. Bis-Vinyldimethicone/Dimethicone Copolymer

Tony O'Lenick notes that the nomenclature for silicone elastomers and resins is complicated, and explains the difference between dimethicone/vinyl dimethicone copolymer and bis-vinyldimethicone/dimethicone copolymer.

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