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Journal of Cosmetic Science

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https://www.readbyqxmd.com/read/27319059/improving-the-accuracy-of-skin-elasticity-measurement-by-using-q-parameters-in-cutometer
#1
Di Qu, G Paul Seehra
The skin elasticity parameters (Ue, Uv, Uf, Ur, Ua, and R0 through R9) in the Cutometer are widely used for in vivo measurement of skin elasticity. Their accuracy, however, is impaired by the inadequacy of the definition of a key parameter, the time point of 0.1 s, which separates the elastic and viscoelastic responses of human skin. This study shows why an inflection point (t(IP)) should be calculated from each individual response curve to define skin elasticity, and how the Q-parameters are defined in the Cutometer...
January 2016: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/27319058/harvesting-electricity-from-human-hair
#2
Brindan Tulachan, Sushil K Singh, Deepu Philip, Mainak Das
Electrical conductivity of human hair is a debatable issue among hair experts and scientists. There are unsubstantiated claims that hair conducts electricity. However, hair experts provided ample evidence that hair is an insulator. Although wet hair exhibited drastic reduction in resistivity; scientists regarded hair as a proton semiconductor at the best. Here, we demonstrate that hair filaments generate electricity on absorbing water vapor between 50 degrees and 80 degrees C. This electricity can operate low power electronic systems...
January 2016: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/27319057/autophagy-in-human-skin-fibroblasts-comparison-between-young-and-aged-cells-and-evaluation-of-its-cellular-rhythm-and-response-to-ultraviolet-a-radiation
#3
Nadine Pernodet, Kelly Dong, Edward Pelle
Autophagic mechanisms play critical roles in cell maintenance. Damaged organelles that are not removed by autophagosomes, which act by engulfing and degrading these cellular components, have been linked to various pathologies. Recently, the progression of aging has also been correlated to a compromised autophagic response. Here, we report for the first time a significant reduction in autophagic levels in synchronized aged normal human skin fibroblasts as compared to young fibroblasts. We measured a 77.9% reduction in autophagy as determined by reverse transcription-polymerase chain reaction for LC3B expression, a microtubule-associated protein correlated to late stage autophagosome formation...
January 2016: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/27319056/investigation-of-hair-dye-deposition-hair-color-loss-and-hair-damage-during-multiple-oxidative-dyeing-and-shampooing-cycles
#4
Guojin Zhang, Roger L McMullen, Lidia Kulcsar
Color fastness is a major concern for consumers and manufacturers of oxidative hair dye products. Hair dye loss results from multiple wash cycles in which the hair dye is dissolved by water and leaches from the hair shaft. In this study, we carried out a series of measurements to help us better understand the kinetics of the leaching process and pathways associated with its escape from the fiber. Hair dye leaching kinetics was measured by suspending hair in a dissolution apparatus and monitoring the dye concentration in solution (leached dye) with an ultraviolet-visible spectrophotometer...
January 2016: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/27125014/competing-for-domain-names-in-the-cosmetic-industry-registrants-versus-trademark-owners
#5
Gerald M Levine, Levine Samuel
No abstract text is available yet for this article.
November 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/27125013/quantifying-hair-shape-and-hair-damage-induced-during-reshaping-of-hair
#6
REVIEW
Roger L McMullen, Guojin Zhang, Timothy Gillece
The manipulation of hair shape, either to straighten or curl hair, is carried out on a grand scale in the hair care consumer market. Often, such changes are brought about through chemical or physical treatment, resulting in changes to hair chemistry. In this article, we review existing and present new data on methods to assess the efficacy of such treatments, mostly concentrating on imaging technologies used in conjunction with image analysis. In addition, we introduce spectroscopic imaging techniques and fluorescence spectrophotometry as tools to assess the biochemical state of the hair fiber as a result of hair shape modification regimens...
November 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/27125012/volatile-profile-and-sensory-property-of-gardenia-jasminoides-aroma-extracts
#7
Mayuree Kanlayavattanakul, Nattaya Lourith
The volatile profiles of aroma extracts prepared from the flower of Gardenia jasminoides by different methods were investigated using gas chromatography-mass spectrometry. The enfleurage extraction using spermaceti wax and palm oil afforded the best aroma extract with a preference that was significantly (p < 0.05) better than those from solvent extractions, as sensorially evaluated in 43 volunteers. The odor quality of the absolute de enfleurage was similar to the floral scent of fresh gardenia, as confirmed in 152 volunteers...
November 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/27125011/feasibility-study-of-a-cosmetic-cream-added-with-aqueous-extract-and-oil-from-date-phoenix-dactylifera-l-fruit-seed-using-experimental-design
#8
Fatma Lecheb, Salem Benamara
This article reports on the feasibility study of a cosmetic cream added with aqueous extract and oil from date (Phoenix dactylifera L.) fruit seed using experimental design. First, the mixture design was applied to optimize the cosmetic formula. The responses (dependent variables) were the spreadability (YSp) and viscosity (YVis), the factors (independent variables) being the weight proportions of the fatty phase (X1), the aqueous date seed extract (X2), and the beeswax (X3). Second, the cosmetic stability study was conducted by applying a full factorial design...
November 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/27125010/effect-of-formulation-variables-on-the-physical-properties-and-stability-of-dead-sea-mud-masks
#9
Sawsan Shahin, Saja Hamed, Hatim S Alkhatib
The physical stability of Dead Sea mud mask formulations under different conditions and their rheological properties were evaluated as a function of the type and level of thickeners, level of the humectant, incorporation of ethanol, and mode of mud treatment. Formulations were evaluated in terms of visual appearance, pH, moisture content, spreadability, extrudability, separation, rate of drying at 32 degrees C, and rheological properties. Prepared mud formulations and over-the-shelf products showed viscoplastic shear thinning behavior; satisfactory rheological behavior was observed with formulations containing a total concentration of thickeners less than 10% (w/w)...
November 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26753435/risk-assessment-of-allergen-metals-in-cosmetic-products
#10
Hande Sipahi, Mohammad Charehsaz, Zerrin Güngör, Onur Erdem, Buğra Soykut, Cemal Akay, Ahmet Aydin
Cosmetics are one of the most common reasons for hospital referrals with allergic contact dermatitis. Because of the increased use of cosmetics within the population and an increase in allergy cases, monitoring of heavy metals, especially allergen metals, is crucial. The aim of this study was to investigate the concentration of allergen metals, nickel (Ni), cobalt (Co), and chromium (Cr), in the most commonly used cosmetic products including mascara, eyeliner, eye shadow, lipstick, and nail polish. In addition, for safety assessment of cosmetic products, margin of safety of the metals was evaluated...
September 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26753434/twelve-hour-skin-hydration-after-a-single-application-of-a-lamellar-moisturizer
#11
LETTER
Stephanie J Nisbet, Peter Dykes
No abstract text is available yet for this article.
September 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26753433/equivalence-evaluation-of-moisturizers-in-atopic-dermatitis-patients
#12
RANDOMIZED CONTROLLED TRIAL
Mai Tamura, Hiroshi Kawasaki, Takuji Masunaga, Tamotsu Ebihara
Skin care with moisturizers to compensate for dry skin and decreased barrier function, and to prevent recurrence of inflammation is thought to be very important for management of atopic dermatitis. However, many patients cannot continue the use of moisturizing medications because of unpleasantness. Cosmetics may be able to compensate for such deficiencies. To evaluate the usefulness of cosmetics in maintenance of the skin in remission, we conducted a clinical trial using moisturizing cosmetics of a phospholipid preparation that showed good moisture-retaining effect in dry skin...
September 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26753432/the-top-echorich-band-in-a-50-mhz-ultrasound-sonogram-reflects-epidermal-properties
#13
Di Qu, Sarah Whitehead
High-frequency ultrasonography is a useful noninvasive tool to measure the acoustic properties of skin. Due to the ambiguity or confusion over the meaning of the skin entry echo, measurements have been limited to the dermis or full skin thickness with little data on epidermal properties. The purpose of this study was to better understand the nature of the skin entry echo and determine whether it is related to epidermal structure. We approached the problem by dampening the sudden change in material density from the coupling medium to the skin surface using facial tissue as a masking material...
September 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26665982/the-impact-of-the-new-european-cosmetic-regulation-on-the-preservative-system
#14
Sarah Lafosse, Ségolène De Vaugelade, Heloise Berthele, Stephane Pirnay
No abstract text is available yet for this article.
July 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26665981/determination-of-seven-sunscreen-agents-and-two-ultraviolet-stabilizers-in-skin-care-products-using-ultra-performance-liquid-chromatography
#15
Aimee Gowell, John Habel, Caryn Weiss, Paul Parkanzky
Ultraviolet radiation (UVR) is a well-known environmental carcinogen. Protection against UVR exposure has resulted in an increasing number of sunscreen agents being incorporated into a greater variety of cosmetic formulations including moisturizing lotions, color cosmetics, and skin care creams. Meanwhile, global regulation of sun care products is changing. New guidelines for sunscreen efficacy have resulted in a shift in product formulation that requires sunscreen products to provide broad spectrum UV protection...
July 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26665980/the-stability-and-controlled-release-of-i-ascorbic-acid-encapsulated-in-poly-ethyl-2-cyanoacrylate-nanocapsules-prepared-by-interfacial-polymerization-of-water-in-oil-microemulsions
#16
Su-Ning Zhang, Tao Chen, Yi-Guang Guo, Jian Zhang, Xiaoqiu Song, Lei Zhou
The L-ascorbic acid (AA) was encapsulated into biodegradable and biocompatible poly(ethyl-2-cyanoacrylate) (PECA) nanocapsules by interfacial polymerization of water-in-oil (W/O) microemulsions. The influences of surfactant concentration, pH value of the dispersed aqueous phase, and W/O ratio on nanocapsule size were discussed. The stability and in vitro release of encapsulated AA were also investigated. The results show that nanocapsules could be obtained under the conditions with low pH value, high fraction of aqueous phase, and appropriate surfactant concentration...
July 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26665979/human-health-risk-assessment-of-heavy-metals-in-cosmetics-in-nigeria
#17
John K Nduka, Odiba, Orish E Orisakwe, Linda D Ukaebgu, Chinwetuto Sokaibe, Nnaemeka A Udowelle
Forty two different cosmetics were purchased from supermarkets and cosmetic shops within Unitsha Main Market and Eke-Awka markets in Anambra, Nigeria. Of the cosmetics, 16% were locally manufactured in Nigeria while 83.33% were imported into Nigeria. The cosmetics were ashed before digestion and filtration. The filtrates were assayed for lead, cadmium, manganese, nickel, chromium, mercury, and arsenic with atomic absorption spectrophotometry at 205 Å. The health risk assessment methods developed by the United States Environmental Protection Agency were employed to explore the potential human health risk of heavy metals in cosmetics...
July 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26665978/potential-of-native-thai-aromatic-plant-extracts-in-antiwrinkle-body-creams
#18
RANDOMIZED CONTROLLED TRIAL
Pimporn Leelapornpisid, R Randall Wickett, Sunee Chansakaow, Nitima Wongwattananukul
Antioxidant activities of 10 essential oils and 10 absolutes extracted from Thai aromatic plants were evaluated and compared to thyme oil, trolox, quercetin, and kaempferol by two independent assays: the 2, 2-diphenyl-1-1-picrylhydrazyl (DPPH*) radical scavenging assay and the thiobarbituric acid reactive species (TBARS) assay for lipid peroxidation. We found that four essential oils including ginger oil (Zingiber officinale Roscoe), Wan-sao-long leaf oil (Amomum uliginosum Koen), lemongrass oil (Cymbopogon citratus), holy basil oil (Ocimum sanctum L...
July 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26454907/on-straightening-and-relaxing-of-african-hair
#19
Leszek J Wolfram
No abstract text is available yet for this article.
May 2015: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/26454906/enhancing-skin-radiance-through-the-use-of-effect-pigments
#20
David Funk, Brandon Kovarovic, Gabriel Uzunian, Jill Litchauer, Tricia Daley-Bowles, Amber Hubschmitt
In this study, the radiance contribution from formulating various pearlescent effect pigments into a skin cream was modeled using gloss map histograms created from digital photographs of clinical panelists. CIELab color data from the various pearlescent effect pigments applied to simulated skin tone drawdown cards was first collected to screen experimental candidates and to help select the concentration of pigment used in the formula. Optical microscopy was used to develop a simple coverage model to control for the differences in particle size and density of the effect pigments...
May 2015: Journal of Cosmetic Science
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