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Chemistry
New in Chemistry (page 4 of 23)
Dec 13, 2010 | 05:15 PM CST
Comparatively Speaking: GLC vs. GPC
By: Anthony J. O'Lenick Jr., Siltech LLC
Tony O'Lenick explains the difference between two types of chromatography: gas liquid chromatography (GLC) and gel permeation chromatography (GPC), both used to separate compounds in mixtures.
Dec 08, 2010 | 08:55 AM CST
Comparatively Speaking: Essential Fatty Acid vs. Trans Fatty Acid
By: 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 24, 2010 | 10:34 AM CST
NY Chemists Develop Nature-inspired Responsive Molecule
An amphiphilic molecule designed by chemists at The City College of New York is said to respond to stimuli in a similar manner to the Venus fly trap by changing its structure when heated slightly, then reverting to its original form when cooled.
Nov 23, 2010 | 05:10 PM CST
Comparatively Speaking: Liquid, Soft and Dry Extracts vs. Tinctures
By: 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 | 10:07 AM CST
Comparatively Speaking: Naturally Occurring vs. Naturally Derived vs. Chemically Modified Butters
By: 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 | 08:45 AM CDT
Comparatively Speaking: Singlet vs. Triplet State of UV Filters
By: Anthony J. O'Lenick Jr., Siltech LLC, and Crai…
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 13, 2010 | 08:20 AM CDT
Comparatively Speaking—PEG-8 Dimethicone vs. PEG-8 Dimethicone Meadowfoamate
By: Anthony J. O'Lenick Jr., Siltech LLC, and Tim …
In this discussion, Tony O'Lenick looks to Tim Kenny to explain the differences in chemistry between PEG-8 dimethicone and PEG-8 dimethicone meadowfoamate and what they mean to formulators, such as for conditioning, oil solubility and wetting.
Oct 06, 2010 | 08:30 AM CDT
Patent Picks—Copper-bound Botanicals, Skin Pigment Regulation, Antioxidants and More
By: Rachel Grabenhofer, C&T magazine
Chosen biweekly by Rachel Grabenhofer, editor, for their relevance to personal care, Patent Picks are taken from publicly available sources. This edition features recently issued patents relevant to skin care and health.
Oct 06, 2010 | 08:15 AM CDT
Research on Nano-sized Polymers Reveals Thermal-related Transitions
Research conducted at Kyoto University on nano-sized polymer assemblies could improve the production of nanofibers, new materials and more. For instance, the work led to the finding that the melting point of confined PEGs decreased as their molecular weight, length in this case, increased.
Sep 29, 2010 | 10:40 AM CDT
Amphiphilic Silicones to Extract Botanical Actives
By: Anthony J. O'Lenick, Jr., Siltech LLC, and Kev…
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.