A brief illustrated history on sunscreens and sun protection

2015 ◽  
Vol 87 (9-10) ◽  
pp. 929-936 ◽  
Author(s):  
Federico Svarc

AbstractNobody exactly knows when human beings begun protecting their skin from the sun. Our dark-skinned ancestors in Africa had the benefit of natural melanin to avoid sunburn. With migration to cooler regions, humans clothed themselves to avoid frost, losing their protective pigmentation. For cultural reasons, occidentals continued to cover their body up to the XIXth century. After World War I fashion wanted tanned bodies. Oils without protection to UV radiation were used. In 1935 Eugène Schueller, founder of L’Oreal, formulated the first radiation filtering product, “Ambre Solaire Huile”. Benjamin Green produced for the soldiers battling in the Pacific a red jelly substance as a physical blocker. The hazards of sun overexposure were already apparent. The product boomed under the brand Coppertone. In 1946 Franz Greiter developed the “Gletscher Créme”. In 1956 R. Schulz introduced the concept of the sun protection factor (SPF). All those products protected only against UVB radiation, whose main visible result is erythema. There was still no concern on the more penetrating UVA radiation, and skin cancer prevention nor on several other contemporary issues. Today we benefit from very high SPF products with broad UV protection. Solubility limitations and sensorial properties make them difficult to formulate and stabilize.

Author(s):  
Adam R. McKee

The Lost Generation is a group of expatriate American writers who came of age during World War I and who subsequently became prominent literary figures. The term can also be used to refer to the whole of the post-World War I generation. The term was coined by Gertrude Stein (1874–1946) in a comment to Ernest Hemingway (1899–1961) in which she declared, ‘You are all a lost generation’. Hemingway subsequently used this phrase as an epigraph to his novel The Sun also Rises (1926), which is often seen as emblematic of the Lost Generation’s literary tradition.


1998 ◽  
Vol 50 (S9) ◽  
pp. 138-138
Author(s):  
Robert W. Jones ◽  
Sarah Smith ◽  
Claire Boden ◽  
Brian G. Carpenter

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Alesandra R. Nunes ◽  
Ícaro G. P. Vieira ◽  
Dinalva B. Queiroz ◽  
Antonio Linkoln Alves Borges Leal ◽  
Selene Maia Morais ◽  
...  

Many pathological problems are initiated by ultraviolet radiation (UVR), such as skin cancer, the most commonly diagnosed cancer worldwide. The UVA (320–400 nm) and UVB (290–320 nm) wavelengths may cause effects such as photoaging, DNA damage, and a series of cellular alterations. The UVA radiation can damage the DNA, oxidize the lipids, and produce dangerous free radicals, which can cause inflammation, modify the gene expression in response to stress, and weaken the skin immune response. With a minor penetration, the UVB radiation is more harmful, being responsible for immediate damage. Ultraviolet radiation light emitted by the sun is considered necessary for the existence of life but cause radiation problems, especially in the skin. The photoprotective activities of plant extracts and isolated composts were evaluated by many reports, as well as the correlation of these compounds with the antioxidant activity. This review presents plant compounds with interest to the cosmetic industry to be used in sunscreens such as flavonoids and cinnamates.


Author(s):  
Bernard P. Binks ◽  
Paul D.I. Fletcher ◽  
Andrew J. Johnson ◽  
Ioannis Marinopoulos ◽  
Jonathan Crowther ◽  
...  

Author(s):  
Renata Chadyšienė ◽  
Aloyzas Girgždys

The paper presents the assessment of ultraviolet radiation from technical sources. It has been determined that the intensity of UVA radiation is about 10 times higher than the intensity of radiation of UVB. It has been investigated that the intensity of UV radiation during the welding process nonlinearly depends on the strength of the current, namely, if the strength of the current is reduced by 60%, the intensity of UV radiation is reduced by 20%, it also depends on the distance from the source, namely, if the distance is increased 10 times, the intensity of UV radiation is reduced about 25 times. The dose of UVA and UVB radiation from various resources is calculated. Comparison with the minimum erythema dose is submitted. It has been obtained that when the strength of the current is 315 A, the UV radiation dose exceeds 1 MED, namely, UVA ∼ 3000, UVB ∼300 times. After having carried out the experiment it has been found that the UV radiation emitted from a welder comprises about 80% of UVA, and about 20% of UVB. The results of investigation made in a solarium show that UV radiation from lamps comprises 98% of UVA radiation and 2% – of UVB radiation, while in the Sun rays reaching the Earth UV radiation comprises 96% of UVA and 4% of UVB. Santrauka Darbe radiometriniais metodais nustatyti ir įvertinti dirbtinių šaltinių skleidžiamos ultravioletinės alfa ir beta spinduliuotės (UVA ir UVB) intensyvumo pokyčiai ir apskaičiuota įvairių šaltinių sukuriama UVA ir UVB spinduliuotės dozė. Nustatyta, kad suvirinimo proceso metu skleidžiamos UV spinduliuotės intensyvumas priklauso nuo šaltinio intensyvumo (sumažinus šaltinio intensyvumą apie 60 %, UV spinduliuotės intensyvumas sumažėja apie 20 %) bei nuo atstumo nuo šaltinio (padidinus atstumą 10 kartų UV spinduliuotės intensyvumas sumažėja apie 25 kartus). Įvairių šaltinių sukuriama UVA ir UVB spinduliuotės dozė palyginama su minimalia eritemine doze. Gauta, kad suvirinimo metu, esant 315 A elektros srovės stipriui, UVA spinduliuotės dozė 1 MED viršija apie 3000, UVB ~ 300 kartų. Nustatyta, kad apie 80 % iš suvirinimo aparato skleidžiamos UV spinduliuotės yra UVA, o apie 20 % – UVB. 98 % soliariumo lempų skleidžiamos UV spinduliuotės yra UVA ir 2 % – UVB, gi iš Žemę pasiekiančios Saulės UV spinduliuotės 96 % yra UVA ir 4 % UVB. Резюме Радиометрическими методами определены изменения УФА- и УФБ-излучений некоторых техногенных источников, а также рассчитана доза УФА- и УФБ-излучений этих источников. Установлено, что в среднем интенсивность УФА-излучения в 10 раз сильнее интенсивности УФБ-излучения. Установлено также, что в процессе сварки интенсивность испускаемого УФ-излучения зависит от интенсивности источника: при снижении интенсивности источника на 60% интенсивность УФ-излучения снижается приблизительно на 20%; при увеличении расстояния от места сварки в 10 раз интенсивность УФ-излучения снижается приблизительно в 25 раз. Рассчитана доза УФАи УФБ-излучений, создаваемая различными техногенными источниками. Представлено ее сравнение с минимальной эритемной дозой. Получено, что во время сварки при силе электрического тока 315 А доза УФА-излучения превышает 1 МЭД в 3000 раз, а УФБ-излучения – в 300 раз. Экспериментальными исследованиями получено, что испускаемое при сварке УФ излучение на 80% состоит из УФА-излучения и на 20% – из УФБ-излучения. В соляриуме, где был проведен эксперимент, УФ-излучение ламп состоит на 98% из УФА лучей и на 2% из УФБ лучей. Для сравнения: околоземное УФ-излучение Солнца в Литве состоит в среднем на 96% из УФА лучей и на 4% из УФБ лучей.


2013 ◽  
Vol 19 (4) ◽  
pp. 279-289 ◽  
Author(s):  
Sofia Potente ◽  
Vanessa Rock ◽  
Jacqueline McIver ◽  
Melinda Williams ◽  
Christopher Magee ◽  
...  

Australian youth have good knowledge about skin cancer prevention as a result of over three decades of traditional mass media campaigns. However, youth sun protection behavior remains poor. This case study describes the results of a unique social marketing campaign (the Sun Sound) aimed at translating youths’ knowledge into improved sun protection behavior. Formative research identified that a key barrier to sun protection was youth regularly forgot to protect their skin. As such, the campaign centered on a musical jingle that was broadcast at outdoor recreational settings as a “cue to action” reminder to use sun protection at the time and point of sun exposure. The Sun Sound was trialed at two coastal communities in New South Wales, Australia, during summer 2009–2010. The media launch generated 17.6 million Australian audience impressions (advertising value A$257,785). Intercept surveys conducted with 467 youth aged 12–18 years found there was high unprompted recall (41%) and understanding (79%) of the Sun Sound message. The Sun Sound was found to be an effective cue to action in prompting sun protection behaviors when heard, with over a third (38%) of respondents reporting use of additional sun protection upon hearing the jingle. Since the pilot, the Sun Sound has expanded to over 60 pools, beaches, and selected venues across Australia. The campaign demonstrates it is possible to influence behavior by targeting audiences at the actual point that behavior occurs, using research-informed insights and a relevant marketing mix.


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