Photoprotection
Mostrando 13-24 de 83 artigos, teses e dissertações.
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13. Epidemiological profile of elderly patients with non-melanoma skin cancer seen at the dermatology outpatient clinic of a public hospital
Abstract: Basal cell carcinoma and Squamous cell carcinoma, referred to as non-melanoma skin cancer, are the most common malignancies in humans. Their incidence is increasing worldwide every year. In Brazil, even with the advent of educational campaigns on photoprotection and laws that banned tanning beds, they are the most frequent neoplasias, representing
An. Bras. Dermatol.. Publicado em: 2017-12
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14. Development of sunscreen products containing passion fruit seed extract
Abstract Application of sunscreen is the most established method of protecting skin from premature aging and photoaging. In this study, the passion fruit seed extract, enriched with biologically beneficial phenolics, was formulated into sun-protective makeup product. The UVB protection of concealer mousse was found have twofold higher sun protection factor (
Braz. J. Pharm. Sci.. Publicado em: 20/04/2017
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15. Prevalence of photoprotection and its associated factors in risk group for skin cancer in Teresina, Piauí
Abstract: Background: The incidence of skin cancer has increased worldwide, particularly melanoma rates, which had a mean development of 2.6 % a year in the last 10 years. The agreement on the relation between long-term or chronic exposure to the sun and the emergence of these neoplasias has made several workers who perform activities exposed to solar radia
An. Bras. Dermatol.. Publicado em: 2017-03
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16. Lupus tumidus: a report of two cases
Abstract Lupus tumidus is considered a rare subtype of chronic cutaneous lupus erythematosus, characterized by erythema and bright urticarial erythematous-violaceous lesions that leave no scars after regression. Histopathology reveals perivascular and periannexal lymphohistiocytic infiltrates in the papillary and reticular dermis and interstitial mucin depos
An. Bras. Dermatol.. Publicado em: 2016-10
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17. In vitro and in vivo evaluation of efficacy and safety of photoprotective formulations containing antioxidant extracts
ABSTRACT Chronic exposure to solar radiation could contribute to premature skin aging and skin cancer. Skin presents its own antioxidant defense, however when defenses are out of balance, reactive oxygen species could damage biological structures. In the present work, an oil-in-water photoprotective emulsion was developed and Bauhinia microstachya var. massa
Rev. bras. farmacogn.. Publicado em: 2016-04
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18. From Lighting to Photoprotection: Fundamentals and Applications of Rare Earth Materials
Light and rare earths (RE) have a long lived relationship that dates from the discoveries of these elements in the nineteenth century. Since then, the increasing comprehension of their spectroscopic properties conducted to a wide and alluring literature about light absorption and emission by this particular and fascinating group. For more than 50 years, RE-c
J. Braz. Chem. Soc.. Publicado em: 2015-12
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19. In vitro photoprotective effects of Marcetia taxifolia ethanolic extract and its potential for sunscreen formulations
AbstractThe species Marcetia taxifolia (A. St.-Hil.) DC., Melastomataceae, which is endemic of the rupestrian fields of northeastern Brazil, contains a significant amount of flavonoids. In this work, the potential of the ethanolic extract of M. taxifolia as the active principle in a sunscreen photoprotection (UV-A and UV-B) formulation was investigated. The
Rev. bras. farmacogn.. Publicado em: 2015-08
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20. Solar ultraviolet radiation: properties, characteristics and amounts observed in Brazil and South America
Abstract The beneficial and harmful effects of human exposure to solar ultraviolet radiation (UV-R) are topics that arouse great interest not only among physicians and scientists, but also the general public and the media. Currently, discussions on vitamin D synthesis (beneficial effect) are confronted with the high and growing number of new cases of non-mel
An. Bras. Dermatol.. Publicado em: 2015-06
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21. Brazilian Consensus on Photoprotection
Brazil is a country of continental dimensions with a large heterogeneity of climates and massive mixing of the population. Almost the entire national territory is located between the Equator and the Tropic of Capricorn, and the Earth axial tilt to the south certainly makes Brazil one of the countries of the world with greater extent of land in proximity to t
An. Bras. Dermatol.. Publicado em: 2014-12
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22. Epidemiological profile of nonmelanoma skin cancer in renal transplant recipients: experience of a referral center
BACKGROUND: Nonmelanoma skin cancer is the most common form of cancer in humans and also the malignant disease that is increasingly common among kidney transplant recipients. OBJECTIVE: To determine the epidemiological characteristics of renal transplant recipients with nonmelanoma skin cancer seen at a referral transplantation center. METHODS: Cross-se
An. Bras. Dermatol.. Publicado em: 2014-09
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23. Synthesis and evaluation of octocrylene-inspired compounds for UV-filter activity
Octocrylene (2-ethylhexyl 2-cyano-3,3-diphenyl-2-propenoate) is present in several sunscreens and is known to work synergistically with UV filters. We prepared eight octocrylene-related compounds to test their photoprotective activities by measuring diffuse transmittance. The compounds had varied photoprotection profiles, with Sun Protection Factors (SPF) ra
Quím. Nova. Publicado em: 2014-07
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24. Analysis of photosynthetic pigments and phenolic compounds in Gracilariopsis tenuifrons (C.J. Bird &E.C. Oliveira) Fredericq &Hommersand at different light intensities / Análise de pigmentos fotossintetizantes e substâncias fenólicas em Gracilariopsis tenuifrons (C. J. Bird &E. C. Oliveira) Fredericq &Hommersand em diferentes intensidades de luz
The high-light stress can adversely affect growth and development of photosyn-thetic organisms. In these situations, it is common to note chemical responses that may indicate different strategies of photoprotection. In this study, protocols were optimized for analysis and extraction of phenolic compounds and photosynthetic pig-ments in macrophytic red algae
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2012