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https://www.readbyqxmd.com/read/28527417/fate-of-the-sunscreen-compound-oxybenzone-in-cyperus-alternifolius-based-hydroponic-culture-uptake-biotransformation-and-phytotoxicity
#1
Feiran Chen, Christian Huber, Peter Schröder
Oxybenzone (OBZ), a common ingredient in sunscreens and personal care products, has been frequently detected in effluents from municipal wastewater treatment plants and also in surface waters. OBZ is an emerging contaminant due to its adverse impacts on marine/aquatic ecosystems. To investigate the removal and degradation capacity of phytotreatment for OBZ, the common wetland plant species Cyperus alternifolius L. was exposed to this compound at 5, 25 and 50 μM for 120 h, respectively. Continuous uptake by roots and accumulation in plant tissues was observed over the exposure time, and depletion of spiked OBZ from the aqueous medium exceeded 73...
May 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28526194/observational-study-of-free-public-sunscreen-dispenser-use-at-a-major-us-outdoor-event
#2
Megan Wood, Tom Raisanen, Ingrid Polcari
No abstract text is available yet for this article.
April 14, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28523887/parent-and-child-characteristics-associated-with-child-sunburn-and-sun-protection-among-u-s-hispanics
#3
Ashley K Day, Jerod L Stapleton, Ana M Natale-Pereira, James S Goydos, Elliot J Coups
BACKGROUND/OBJECTIVES: Skin cancer incidence has been increasing in U.S. Hispanics over several decades and the postdiagnosis outcomes are worse for Hispanics than for non-Hispanic whites. Parents are influential in children's health preventive behaviors, but little is known about parental factors associated with children's skin cancer-related behaviors in the U.S. Hispanic population. The present study examined parental and child correlates of skin cancer-related behaviors (sunburns, sunbathing, sun-protective clothing use, and sunscreen use) of children of Hispanic parents...
May 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28516475/evaluation-of-detection-distance-dependent-reflectance-spectroscopy-for-the-determination-of-the-sun-protection-factor-using-pig-ear-skin
#4
Carina Reble, Ingo Gersonde, Sabine Schanzer, Martina C Meinke, Jürgen Helfmann, Jürgen Lademann
Determination of sun protection factors (SPFs) is currently an invasive method, which is based on erythema formation (phototest). Here we describe an optical setup and measurement methodology for the determination of SPFs based on diffuse reflectance spectroscopy, which measures UV-reflectance spectra at 4 distances from the point of illumination. Due to a high spatial variation of the reflectance data, most likely due to inhomogeneities of the sunscreen distribution, data of 50 measurement positions are averaged...
May 18, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28513819/sun-exposure-sun-protection-and-sunburn-among-canadian-adults
#5
Lauren Pinault, Vitali Fioletov
BACKGROUND: Ultraviolet radiation (UVR) exposure and a history of sunburn are important risk factors for skin cancer. Sunburn is more common among men, younger age groups, and people in higher income households. Sun protection measures also vary by sex, age, and socioeconomic characteristics. Associations between ambient UVR and sunburn and sun safety measures have not been quantified. DATA AND METHODS: A total of 53,130 respondents aged 18 or older answered a Canadian Community Health Survey (CCHS) module on sun safety, which was administered in six provinces from 2005 to 2014...
May 17, 2017: Health Reports
https://www.readbyqxmd.com/read/28511043/environmental-behavior-of-12-uv-filters-and-photocatalytic-profile-of-ethyl-4-aminobenzoate
#6
Adela Jing Li, Ziye Sang, Chi-Hang Chow, Japhet Cheuk-Fung Law, Ying Guo, K S-Y Leung
Ethyl-4-aminobenzoate (Et-PABA) is currently used as a substitute for 4-aminobenzoate (PABA) in sunscreens and anesthetic ointments. Despite its widespread use and hydrophilicity, Et-PABA has never been found in environmental waters. This study, probed the occurrence of Et-PABA in both seawater and drinking water sources in Hong Kong, and evaluated its transformation products (TPs) and environmental fate via cumulative potency and photocatalytic profile analyses. Another 11 UV filters used in skin-care products were also studied...
April 28, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28510141/sunscreens-an-update
#7
REVIEW
Jennifer Brescoll Mancuso, Rohit Maruthi, Steve Q Wang, Henry W Lim
Sunscreens have been widely used by the general public for their photoprotective properties, including prevention of photocarcinogenesis and photoaging and management of photodermatoses. It is important to emphasize to consumers the necessity of broad-spectrum protection, with coverage of both ultraviolet A (320-400 nm) and ultraviolet B (290-320 nm) radiation. This review discusses the benefits of sunscreen, different ultraviolet filters, sunscreen regulations and controversies, the importance of broad-spectrum protection, issues of photostability and formulation, and patient education and compliance...
May 16, 2017: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/28509652/risk-assessment-of-zinc-oxide-a-cosmetic-ingredient-used-as-a-uv-filter-of-sunscreens
#8
Kyu-Bong Kim, Young Woo Kim, Seong Kwang Lim, Tae Hyun Roh, Du Yeon Bang, Seul Min Choi, Duck Soo Lim, Yeon Joo Kim, Seol-Hwa Baek, Min-Kook Kim, Hyo-Seon Seo, Min-Hwa Kim, Hyung Sik Kim, Joo Young Lee, Sam Kacew, Byung-Mu Lee
Zinc oxide (ZnO), an inorganic compound that appears as a white powder, is used frequently as an ingredient in sunscreens. The aim of this review was to examine the toxicology and risk assessment of ZnO based upon available published data. Recent studies on acute, sub-acute, and chronic toxicities of ZnO indicated that this compound is virtually non-toxic in animal models. However, it was reported that ZnO nanoparticles (NP) (particle size, 40 nm) induced significant changes in anemia-related hematologic parameters and mild to moderate pancreatitis in male and female Sprague-Dawley rats at 536...
2017: Journal of Toxicology and Environmental Health. Part B, Critical Reviews
https://www.readbyqxmd.com/read/28500968/stability-and-removal-of-selected-avobenzone-s-chlorination-products
#9
Cheng Wang, Mojca Bavcon Kralj, Berta Košmrlj, Jun Yao, Suzana Košenina, Olga V Polyakova, Viatcheslav B Artaev, Albert T Lebedev, Polonca Trebše
Stability studies of two avobenzone transformation products: chloro-avobenzone [2-chloro-1-(4-tert-butylphenyl)-3-(4-methoxyphenyl)-1,3-propanedione] and dichloro-avobenzone [2,2-dichloro-1-(4-tert-butylphenyl)-3-(4-methoxyphenyl)-1,3-propanedione] have been performed at different pHs values as well as under UV A light and compared with the stability of avobenzone, one of the mostly used UV A filter present in sunscreens. We have additionally investigated the possibility of application of TiO2 photocatalysis as a method for the removal of them...
May 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28497634/allergic-contact-dermatitis-caused-by-cetearyl-isononanoate-in-a-sunscreen-product
#10
Marie-Elodie Sarre, Elodie Mancel, Martine Drouet, Martine J Avenel-Audran
No abstract text is available yet for this article.
June 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/28493002/dual-prevention-for-uv-induced-skin-damage-incorporation-of-melatonin-loaded-elastic-niosomes-into-octyl-methoxycinnamate-pickering-emulsions
#11
Gulcin Arslan Azizoglu, Sakine Tuncay Tanriverdi, Fadime Aydin Kose, Petek Ballar Kirmizibayrak, Ozgen Ozer
Incorporation of antioxidants into sunscreens is a logical approach, yet co-delivery of them with UV filters is a challenge. Here, we purposed a combination therapy, in which the chemical UV filter, octyl methoxycinnamate, was accumulated on upper skin while the antioxidant, melatonin, can penetrate deeper layers to show its effects. Melatonin-loaded elastic niosomes and octyl methoxycinnamate Pickering emulsion were prepared separately. Lyophilized elastic niosomes were dispersed into the Pickering emulsion to prepare the proposed combination formulation...
May 10, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28486138/the-effects-of-titanium-dioxide-nanoparticles-on-ultrastructure-of-zebrafish-testis-danio-rerio
#12
Tuğba Kotil, Cansu Akbulut, Nazan Deniz Yön
INTRODUCTION: Nanotechnology investigates materials at nanoscale level (0.1-100nm in diameter). There are many commercially nanoproducts such as silver, silicon, titanium, zinc, and gold. They are used in a variety of applications and released to the environment. Titanium dioxide (TiO2) is one of the most commonly used nanoparticles (NP). In this study, the ultrastructural effects of TiO2-NP on zebrafish testis tissue were evaluated. MATERIAL AND METHOD: Zebrafish were divided into four groups (N=60) as one control and 3 experimental groups (1mg/L, 2mg/L and 4mg/L TiO2)...
April 26, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28484486/nanotitania-exposure-causes-alterations-in-physiological-nutritional-and-stress-responses-in-tomato-solanum-lycopersicum
#13
Manish Tiwari, Nilesh C Sharma, Paul Fleischmann, Jauan Burbage, Perumal Venkatachalam, Shivendra V Sahi
Titanium dioxide nanoparticles (nanotitania: TiO2NPs) are used in a wide range of consumer products, paints, sunscreens, and cosmetics. The increased applications lead to the subsequent release of nanomaterials in environment that could affect the plant productivity. However, few studies have been performed to determine the overall effects of TiO2NPs on edible crops. We treated tomato plants with 0.5, 1, 2, and 4 g/L TiO2NPs in a hydroponic system for 2 weeks and examined physiological, biochemical, and molecular changes...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28483712/margin-of-safety-of-pentylene-glycol-derived-using-measurements-of-cutaneous-absorption-and-volatility
#14
A Steiner, K Kugarajan, M Wullimann, B Ruty, G Kunze
The safety assessment of pentylene glycol (PG) has been based on a bioavailability extrapolated from those of other 1,2-glycols or an assumed 100% absorption. To make a better safety assessment and an accurate calculation of the margin of safety (MoS), the skin penetration of PG present in a commercially available sunscreen was measured in pig skin at different exposure durations. The mass balance of PG decreased with increasing exposure durations, from 98% (1 h) to 29% (24 h) and the amount of PG detected in the skin wash decreased over time from 93% to 3%...
May 5, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28474616/ketoprofen-induced-photoallergic-dermatitis
#15
REVIEW
Tiffany Yvonne Loh, Philip R Cohen
Drug-induced photosensitivity reactions are significant adverse effects. Ketoprofen is one of the most common drugs that can cause skin rash in sun-exposed areas. Non-steroidal anti-inflammatory drugs (NSAIDs), such as ketoprofen, are often used for a variety of symptoms, including pain and fever. An understanding of the presentation and clinical course of ketoprofen-induced photosensitivity is necessary to correctly diagnose and manage this condition. Ketoprofen-induced photosensitivity reactions usually present as photoallergic dermatitis, which is a cell-mediated immune process...
December 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28473925/unintended-sunburn-a-potential-target-for-sun-protection-messages
#16
Geraldine F H McLeod, Anthony I Reeder, Andrew R Gray, Rob McGee
New Zealand (NZ) has the highest melanoma incidence rate in the world. Primary prevention efforts focus on reducing sunburn incidence and increasing sun protective practices in the population. However, sunburn from excessive ultraviolet radiation (UVR) remains common. To reduce sunburn incidence, it is important to examine those individuals who experience unintended sunburn. This study aims to use data from the NZ Triennial Sun Protection Survey to describe respondents who were not intending to tan but were sunburnt after outdoor UVR exposure...
2017: Journal of Skin Cancer
https://www.readbyqxmd.com/read/28464994/genotoxic-effects-of-zinc-oxide-nanoparticles-in-nasal-mucosa-cells-are-antagonized-by-titanium-dioxide-nanoparticles
#17
Stephan Hackenberg, Agmal Scherzed, Angela Zapp, Katrin Radeloff, Christian Ginzkey, Thomas Gehrke, Pascal Ickrath, Norbert Kleinsasser
Titanium dioxide nanoparticles (TiO2-NPs) and zinc oxide nanoparticles (ZnO-NPs) are often used in sunscreens and other consumer products due to their photoprotective properties. However, concern exists regarding them possibly causing cyto- and genotoxic effects. The aim of this study was to assess cyto- and genotoxicity of these nanomaterials after single or combined exposure. For this purpose, a battery of cell culture test systems for human nasal mucosa (monolayer, air-liquid interface and mini organ culture) were exposed to 0...
April 2017: Mutation Research
https://www.readbyqxmd.com/read/28460290/immune-and-reproductive-system-impairment-in-adult-sea-urchin-exposed-to-nanosized-zno-via-food
#18
Sonia Manzo, Simona Schiavo, Maria Oliviero, Alfonso Toscano, Martina Ciaravolo, Paola Cirino
In marine environment the release and the consequent sedimentation of ZnO NPs, mainly used in sunscreens, could provoke toxic effects in particular in grazer organisms, like sea urchins. In this work, a first evaluation of DNA and cellular effects on adult sea urchins Paracentrotus lividus exposed through the diet to different sizes (100 and 14nm) ZnO NPs, was performed. Moreover, the consequent impact upon offspring quality was evaluated. Preliminarily results showed that the assumption of food containing ZnO NPs 100nm provoked in adult echinoids damages to immune cells (33% of damaged nucleus) and transmissible effects to offspring (75...
April 28, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28456119/theoretical-insights-on-flavanones-as-antioxidants-and-uv-filters-a-tddft-and-nlmo-study
#19
P Ajmala Shireen, V M Abdul Mujeeb, K Muraleedharan
UV radiations can cause several irritations to the skin like sunburn, photo aging and even skin cancer. Sunscreens are widely used to protect the skin against these harmful radiations. One of the ingredients present in these sunscreens are organic molecules capable of absorbing these harmful radiations. Recently, the search is on for antioxidant molecules which can act as UV filters as they can facilitate photo protection. In this study, a computational investigation based on density functional theory (DFT) is attempted on flavanones namely pinocembrin, pinostrobin and alpinetin found in Boesenbergia pandurata...
April 20, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28444443/-new-approaches-for-the-prevention-of-actinic-keratosis
#20
REVIEW
H Stege, J Krutmann
Actinic keratosis is one of the most common skin diseases. Because of the ongoing demographic changes, it is anticipated that the incidence will further increase. Prevention of actinic keratoses is thus of great importance. By far the most important cause of actinic keratoses is the chronic cumulative irradiation of human skin with ultraviolet B and A radiation from natural sunlight. There is no doubt that use of sunscreens is effective in preventing actinic keratoses. Recent studies indicate that in high-risk groups the regular use of medical devices which are characterized by a very high SPF and which contain liposomally encapsulated DNA repair enzymes are effective in preventing the development of new actinic keratoses even when field cancerization is already present in human skin...
May 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
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