Recent in Chemistry (page 6 of 9)
Oct 4, 2011 | Anthony J. O'Lenick Jr., Siltech LLC
Here, industry expert Tony O'Lenick explains the difference between a compound and a composition, as understanding their differences can lead to better formulation.
Jun 30, 2011 | James Ziming Sun, PhD, Diversapack of California; and Alex Wang Sun, Tufts University
In this review, the authors examine studies relating to the solubility of BPO. The clinical trials discussed show that compared with suspended BPO, BPO solubilized by dimethyl isosorbide reduced P. acnes and decreased both inflammatory lesions/irritation and the emergence of antibiotic-resistant P. acnes strains. This reveals the importance of solubilizing BPO for improved efficacy and safety.
Jun 3, 2011 | Anthony J. O'Lenick Jr., Siltech LLC
Industry expert Tony O'Lenick explains the differences between natural, oxo and ziegler alcohols to help the formulator better understand the source of their raw materials.
May 11, 2011 | Anthony J. O'Lenick Jr., Siltech LLC, and Thomas O'Lenick, PhD, SurfaTech Corp.
This edition of "Comparatively Speaking" describes the difference between the critical molecular weight of entanglement and critical concentration of overlap. These concepts are important for formulators to grasp since they deal with altering the physical properties of a finished product.
Apr 12, 2011 | Anthony J. O'Lenick Jr., Siltech LLC; and Thomas O'Lenick, SurfaTech Corp.
Industry expert Tony O'Lenick defers to his son Thomas O'Lenick, technical director at SurfaTech Corp., to explain the difference between hysteresis and syneresis, as they can affect the aesthetics and physical properties of a formulation.
Feb 15, 2011 | Anthony J. O'Lenick Jr., Siltech LLC
In a previous "Comparatively Speaking" column, Tony O'Lenick explained the differences between trisiloxane and dimethicone copolyol in terms of surface tension. Here he explains the differences in terms of wetting and eye irritation.
Dec 8, 2010 | Anthony J. O'Lenick Jr., Siltech LLC
Tony O'Lenick explains the difference between essential fatty acids, which occur in nature, and trans fatty acids, which are synthesized. In addition, while essential fatty acids are often found in skin care, trans fatty acids are not.
Nov 23, 2010 | Anthony J. O'Lenick, Jr., Siltech LLC
In the following excerpt, Tony O'Lenick looks to Tony Dweck to explain the difference between liquid, soft and dry extracts and tinctures.
Nov 10, 2010 | Anthony J. O'Lenick Jr., Siltech LLC
Tony O'Lenick explains the difference between naturally occurring, naturally derived and chemically modified butters since some butters possess better cosmetic properties, which is of use to the formulator.
Oct 20, 2010 | Anthony J. O'Lenick Jr., Siltech LLC, and Craig Bonda, the HallStar Company
In this discussion, Tony O'Lenick looks to Craig Bonda to explain the photochemical differences between the singlet and triplet states of UV filters. These differences are important to the formulator, as their chemical reactions can lead to the destruction of sunscreens.
Oct 5, 2010 | Anthony J. O'Lenick Jr., Siltech LLC
Tony O'Lenick explains the difference between precision and accuracy as it relates to formulating; for instance, in the case of raw material consistencies between batches.
Sep 29, 2010 | Anthony J. O'Lenick, Jr., Siltech LLC, and Kevin O'Lenick, SurfaTech Corp.
Silicone-based compounds enable chemists to extract the desired fractions of materials from plants as well as impart cosmetic aesthetics. Here the authors discuss how to extract actives using amphiphilic silicones that have different partition coefficients, which are obtained by altering the ratio of oil-, water- and fluoro-soluble groups on the silicone molecule.