scholarly journals Effect of ultraviolet radiation on the skin

2021 ◽  
Vol 2 (4 (292)) ◽  
pp. 17-22
Author(s):  
Indrė Glodianytė ◽  
Zita Gierasimovič
Keyword(s):  
Ultraviolet Radiation ◽  
Ultra Violet ◽  
Virtual Space ◽  
Skin Damage ◽  
Protection Factor ◽  
Ultra Violet Radiation ◽  
Relevant Today ◽  
Negative Effect ◽  
Skin Redness ◽  
Photoaging Of Skin

The beneficial effect of ultraviolet radiation on our skin manifests itself in the synthesis of vitamin D. However, the detrimental effect of this radiation is much more severe. A longer duration of the effect of this radiation speeds up photoaging of skin depending on its phonotype. Symptoms of burning accompanied by tiredness, headaches, changes in temperature, skin damage observed testify to the negative effect of ultra-violet radiation. The unsuitable acquisition of measures of protection with SPF (Sun Protection Factor) numbers and their seasonal application presuppose the formation of wrinkles. This issue remains relevant today as well, because the results of ultraviolet radiation are diagnosed ever more often. They testify to careless skin care. The slightest skin redness, swelling or brownness is reaction of the skin to harmful ultraviolet radiation. The aim of the investigation was to examine the effect of ultraviolet radiation on skin. The investigation was carried out in virtual space on the Internet website www.apklausa.lt in 2021 (2 months). A total of 209 respondents took part in the investigation. The results and conclusions of the investigation are as follows: due to the nature of work, about half of the respondents were exposed to ultraviolet radiation the whole day or 3–4 hours a day. One the third of the respondents used the solarium procedures once per week, provided themselves with measures of protection in shops; however, they did not set great store by the protective effect of SPF filters. One the sixth of the respondents used measures of protection when their skin suffered serious damage.

scholarly journals Evaluation of the Antioxidant Properties of Vitellaria paradoxa Seed Extract and Its Effect of Ultra Violet Radiation Induced Skin Damage

2020 ◽  
pp. 1-7
Author(s):  
Favour Moses Idih ◽  
Uyo Ruth Jeremiah ◽  
Hafsat Enesi ◽  
Oluseyi Valerie Alagbe
Keyword(s):  
Antioxidant Properties ◽  
Ultra Violet ◽  
Negative Control ◽  
Seed Extract ◽  
Control Group ◽  
Skin Damage ◽  
Vitellaria Paradoxa ◽  
Ultra Violet Radiation ◽  
Group 2 ◽  
Violet Radiation

Ultra violet radiation (UVR) is relevant in nature, but despite its importance it has been labeled as a causative agent in skin damage. This study was done to evaluate the antioxidant properties of shea butter and its role in the prevention of skin damage. Six groups of albino rats with three rats per group were used, group 2-5 were exposed to UVR at the dose of 180 mJ/cm2 with group 1 serving as the normal control, group 2 (negative control), group 2-5 (treated groups) and group 6 (normal + treated). The treatment was done by topical application of Vitellaria parodoxa seed extract 5 minutes after exposure to UVR. The in-vitro antioxidant properties determined using DPPH radical scavenging activity revealed that the aqueous extract of Vitellaria paradoxa possesses high antioxidant activity. There was an increase in the concentration of GSH of the treated animals when compared to the negative control (p<0.05). The histopathology result shows the extract had a protective effect on the skin tissue of the experimental animals. This study suggests the extract has the potential to serve as a chemopreventive agent against UV-induced skin damage by neutralizing the effects of free radicals generated by ultraviolet radiation and as such can be recommended for use as UVR screen which could in turn reduce the risk of UVR skin damage.

scholarly journals Overall study on molecular pathways of skin cancer derived from Ultra- violet radiation as an environmental threat

2015 ◽  
Vol 16 (SE) ◽  
pp. 547-555
Author(s):  
Hossein Yousefi ◽  
Samira Mohammadzadeh ◽  
Arsalan Irompour ◽  
Neda Shenasifam ◽  
Elham Roshandel ◽  
...  
Keyword(s):  
Skin Cancer ◽  
Ultraviolet Radiation ◽  
Cell Carcinoma ◽  
Uv Radiation ◽  
Ultra Violet ◽  
Ozone Layer ◽  
Molecular Pathways ◽  
Ultra Violet Radiation ◽  
Environmental Threat ◽  
Violet Radiation

An important part of solar radiation is considered to be Ultraviolet radiation. Though through passing ozone layer it is progressively filtered. Due to the depletion of the ozone layer, the filtering activity of the latter is reduced and as a result more UV radiation, UVB in particular, reaches the Earth’s surface. Ultraviolet radiation is composed of three different wavelengths: UVA, UVB and UVC. Although UVC isn't a cause of skin cancer, UVA and UVB play different roles as for tanning, burning, and photo aging. As a matter of fact, Ultraviolet light can damage DNA in the epidermis. However, through apoptosis the damaged DNA is repaired or deleted in order to prevent the generation of cancer. It is believed that a deficient apoptotic mechanism might make individuals liable to skin cancer. The main factor for generating skin cancer is considered to be the UV radiation which could cause basal cell carcinoma, squamous cell carcinoma and possibly melanoma. For the maintenance of hemostasis, apoptosis plays a key role. This is done via many molecular pathways such as the pathways of tumor suppressor genes like P53, P21 and also the expression of BAX proteins. These pathways are involved in apoptosis after UV radiation. It is clear that the malfunction of these genes and proteins can lower the tolerance of body and cause cancer. The goal of this article is to investigate the molecular pathways of skin cancer derived from Ultra violet radiation as an environmental threat.

scholarly journals THE DENATURATION OF EGG ALBUMIN BY ULTRA-VIOLET RADIATION

1935 ◽  
Vol 19 (2) ◽  
pp. 199-210 ◽  
Author(s):  
Janet Howell Clark
Keyword(s):  
Ultraviolet Radiation ◽  
Ultra Violet ◽  
Heat Denaturation ◽  
Egg Albumin ◽  
Ultra Violet Radiation ◽  
Wide Ph Range ◽  
Lower Temperature ◽  
Ph Range ◽  
Albumin Molecule ◽  
Violet Radiation

The coagulation of isoelectric egg albumin solutions, on exposure to ultraviolet radiation, involves three distinct processes, (1) the light denaturation of the albumin molecule, (2) a reaction between the light denatured molecule and water which may be similar to heat denaturation but occurs at a lower temperature, and (3), the flocculation of the denatured molecules to form a coagulum. The light denaturation is unimolecular, independent of temperature, and occurs over a wide pH range. The reaction between the light denatured molecule and water has a temperature coefficient of 10+ and occurs rapidly at 40°C., a temperature at which heat denaturation is inappreciable.

Green Synthesis of Copper Oxide Nanoparticles using Cucumis sativus (cucumber) Extracts and their Bio-physical and Biochemical Characterization for Cosmetic and Dermatologic Applications

2020 ◽  
Vol 20 ◽  
Author(s):  
Monika Vats ◽  
Shruti Bhardwaj ◽  
Arvind Chhabra
Keyword(s):  
Copper Oxide ◽  
Green Synthesis ◽  
Biochemical Characterization ◽  
Chemical Characterization ◽  
Ultra Violet ◽  
Skin Penetration ◽  
Copper Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Ultra Violet Radiation ◽  
Anti Fungal

Background & Objective: Nanoparticles are used in cosmetic and dermatologic products, due to better skin penetration properties. Incorporation of natural products exhibiting medicinal properties in nano-preparations could significantly improve efficacy of these products and improve the quality of life without the side effects of synthetic formulations. Methods: We here report green synthesis of Copper Oxide nanoparticles, using Cucumber extract, and their detailed biophysical and bio-chemical characterization. Results: These Copper Oxide-Cucumber nanoparticles exhibit significant anti-bacterial and anti-fungal properties, Ultra Violet-radiation protection ability and reactive-oxygen species inhibition properties. Importantly, these nanoparticles do not exhibit significant cellular toxicity and, when incorporated in skin cream, exhibit skin rejuvenating properties. Conclusion: Our findings have implications for nanoparticle-based cosmetics and dermatologic applications.

Ultra-Violet Radiation and Varicose Ulcers

BMJ ◽  
1927 ◽  
Vol 2 (3479) ◽  
pp. 472-472
Author(s):  
M. Weinbren
Keyword(s):  
Ultra Violet ◽  
Ultra Violet Radiation ◽  
Violet Radiation

Ultra-Violet Radiation and the Production of Twins and Double Monsters

1931 ◽  
Vol 4 (3) ◽  
pp. 461-485 ◽  
Author(s):  
Marie A. Hinrichs ◽  
Ida T. Genther
Keyword(s):  
Ultra Violet ◽  
Ultra Violet Radiation ◽  
Violet Radiation

scholarly journals Extensive reduction of surface UV radiation since 1750 in world's populated regions

2009 ◽  
Vol 9 (20) ◽  
pp. 7737-7751 ◽  
Author(s):  
M. M. Kvalev&amp;aring;g ◽  
G. Myhre ◽  
C. E. Lund Myhre
Keyword(s):  
Uv Radiation ◽  
Correlation Coefficients ◽  
Ultra Violet ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Polar Regions ◽  
Ultra Violet Radiation ◽  
Wide Range ◽  
Extensive Surface ◽  
Year 2000

Abstract. Human activity influences a wide range of components that affect the surface UV radiation levels, among them ozone at high latitudes. We calculate the effect of human-induced changes in the surface erythemally weighted ultra-violet radiation (UV-E) since 1750. We compare results from a radiative transfer model to surface UV-E radiation for year 2000 derived by satellite observations (from Total Ozone Mapping Spectroradiometer) and to ground based measurements at 14 sites. The model correlates well with the observations; the correlation coefficients are 0.97 and 0.98 for satellite and ground based measurements, respectively. In addition to the effect of changes in ozone, we also investigate the effect of changes in SO2, NO2, the direct and indirect effects of aerosols, albedo changes and aviation-induced contrails and cirrus. The results show an increase of surface UV-E in polar regions, most strongly in the Southern Hemisphere. Furthermore, our study also shows an extensive surface UV-E reduction over most land areas; a reduction up to 20% since 1750 is found in some industrialized regions. This reduction in UV-E over the industrial period is particularly large in highly populated regions.

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