Recent in Delivery (page 5 of 11)
Formulating Focus—Delivering Actives via Solid Lipid Nanoparticles and Nanostructured Lipid Carriers: Part IV, Percutaneous Absorption and Dermal Cosmetic Formulations
May 3, 2012 | Eliana B. Souto, PhD, and Johann W. Wiechers, PhD
In this fourth part of a five-part series discusses the percutaneous absorption of actives loaded into solid lipid SLNs and NLCs and their formulation in dermal cosmetics.
Mar 30, 2012 | Santiago V. Luis, PhD; M. Isabel Burguete, PhD; Vicente Martí-Centelles; and Jenifer Rubio, PhD Department of Inorganic and Organic Chemistry, University Jaume I, Castellón, Spain
Simple pseudopeptides derived from natural amino acids can be designed and prepared as efficient gelators for a variety of solvents, and with a high potential for biocompatibility. The appropriate selection of structural components, reviewed herein, shows how to produce gels with tailored properties, including high thermal stability.
Formulating Focus—Delivering Actives via Solid Lipid Nanoparticles and Nanostructured Lipid Carriers: Part III, Stability and Efficacy
Mar 1, 2012 | Johann W. Wiechers, PhD, JW Solutions; and Eliana B. Souto, PhD, University Fernando Pessoa
Part I of this review on Solid Lipid Nanoparticles (SLNs) and Nanostructured Lipid Carriers (NLCs) discussed the differences of these two delivery systems for cosmetic actives, as well as their production methods and selection criteria for constituents. In Part II, the characterization of these nano-sized particles was considered. In Part III, presented here, their stability and efficacy are considered; Part IV will address their application in cosmetics.
Delivering Actives via Solid Lipid Nanoparticles and Nanostructured Lipid Carriers: Part II, Nanoparticle Characterization
Jan 5, 2012 | Johann W. Wiechers, PhD, JW Solutions; and Eliana B. Souto, PhD, University Fernando Pessoa
Part I of this review on Solid Lipid Nanoparticles (SLNs) and Nanostructured Lipid Carriers (NLCs) as delivery systems for cosmetic actives appeared in the October 2010 issue of Cosmetics & Toiletries magazine. Part II, presented here, describes how to characterize SLNs and NLCs; part III, in March 2012, will discuss the stability and occlusion properties of actives and liquids in SLNs and NLCs, and examine their efficacy. Finally, part IV, in May 2012, will discuss the use of SLNs and NLCs in cosmetic products.
Dec 2, 2011 | Mussarat Noor; Richard Goddard, PhD; and Arnoldo Fonseca, Air Products and Chemical Inc.
Effective high-water skin care systems may play an important role in addressing emerging market consumer needs. The present study considers the challenges of such systems, particularly regarding the deposition of ingredients across water solubilities, and proposes an amphiphilic cationic polymer as one possible solution.
Apr 6, 2011 | Stacy A. Mundschau, Scott W. Wenzel and Barbara J. Dvoracek, Kimberly-Clark Corp.
When developing moisturizers intended for application via nonwoven substrates, formulators must consider the hydrophobic oils, the affinity of those oils to the substrate, the add-on to the substrate and the stability of the compositions on the substrate. With these considerations, moisturizing formulations were developed and coated onto laminated substrates whose moisturization efficacies were evaluated as described here.
Apr 6, 2011 | Thanaporn Amnuaikit, Wiwat Pichayakorn and Prapaporn Boonme, Prince of Songkla University
This article compares the ability of mixed emulsifier nanoemulsions and polysorbate 60 emulsions to deliver coenzyme Q10 and tocopheryl acetate into the skin. In vitro skin penetration data shows that in newborn pig skin, nanoemulsions can deliver higher amounts of both actives than emulsions.
Dec 16, 2010 | Johann W. Wiechers, PhD, JW Solutions
Jonathan Hadgraft, PhD, named "The Law of Wiechers in Cosmetics" after his friend and colleague. This law argues that all actives should be formulated at 3% for maximum delivery, which Wiechers recently discussed in honor of Hadgrafts's 60th birthday.
Sep 29, 2010 | Johann W. Wiechers, PhD, JW Solutions, and Eliana B. Souto
This first of a two-part series on SLNs and NLCs describes the differences between the two types and their delivery capabilities. The terms solid lipid nanoparticles and nanostructured lipid carriers are not very useful to distinguish these two delivery systems since both are solid, both are lipids, both are nanoparticles, and both are carrier systems. The only real difference between the two is the purity of the single lipid used in SLNs or multiple lipids used, i.e. one solid and one liquid, in NLCs. This factor has an enormous impact on the crystallinity of the lipid phase, which subsequently influences the loading capacity of the system for encapsulated active ingredients or API.
Environmentally Responsive Nanoparticles for Delivery as Assessed via Light Scattering and Near-infrared Imaging
Sep 1, 2010 | Andrew Harper; Steve Tonge, PhD; Lisa Makein, PhD; Mike Kaszuba, PhD; and Malcolm Connah, PhD, Malvern
Lipid-based nanoparticles were developed to respond to environmental stimuli and used as site-directed delivery systems. Through Dynamic Light Scattering (DLS), the self-assembly of these 10–40 nm particles was observed. In addition, the penetration of the particles through the stratum corneum was monitored in vivo using a novel Near-infrared Chemical Imaging (NIR-CI) technique.
Jul 30, 2010 | Nitika U. Bhargava, Vijayanand P. Magar and Shamim A. Momin, Institute of Chemical Technology
Fragrances are volatile and susceptible to oxidation, and can escape from a finished product over time. This limited longevity has led to the development of encapsulation and controlled-release techniques. The present article reviews methods for controlling the release of fragrance in personal care products, and describes their mechanisms of action.
Jul 19, 2010
The number of nanotechnology patents related to personal care products has grown 103% in the past seven years, according to an analysis of world patent activity published by the IP Solutions business of Thomson Reuters.