نتایج جستجو برای: sun uv radiation
تعداد نتایج: 330509 فیلتر نتایج به سال:
BACKGROUND The main source of ultraviolet radiation (UVR) is the sun, affecting organs such as the skin, eyes, and immune system. According to American Conference of Governmental Industrial Hygienist (ACGIH) reports, the amount of UVR reaching the Earth's surface is increasing yearly and is responsible for an increase in solar radiation-related diseases. AIMS To investigate the amount of UVR ...
Because solar UV-radiation represents the most important environmental risk factor for the development of non-melanoma skin cancer, UV protection is important to prevent these malignancies. Consequently, public health campaigns were developed to improve the knowledge of the general population regarding the role of UV-radiation for the development of skin cancer. However, it has to be noted that...
We use time series observations from the Solar and Heliospheric Observatory and Yohkoh spacecraft to study solar polar rays. Contrary to our expectations, we find that the rays are associated with active regions on the Sun and are not features of the polar coronal holes. They are extended, hot plasma structures formed in the active regions and projected onto the plane of the sky above the polar...
BACKGROUND Exposure to sunlight can have both positive and negative health impacts. Excessive exposure to ultra-violet (UV) radiation from the sun can cause skin cancer, however insufficient exposure to sunlight has a detrimental effect on production of Vitamin D. In the construction industry there are onsite proactive behaviours for safety, but sun-safety remains a low priority. There is limit...
Background: Sun protection materials have been one of the major concerns in pharmaceutical industry since almost one century ago. Various materials have been found to have such an effect but there are still many unknown substances that have not been discovered.Objective: To introduce a novel mineral-based sun lotion with considerable UV absorption properties compared to commercially available s...
background: sun protection materials have been one of the major concerns in pharmaceutical industry since almost one century ago. various materials have been found to have such an effect but there are still many unknown substances that have not been discovered. objective: to introduce a novel mineral-based sun lotion with considerable uv absorption properties compared to commercially available ...
Introduction: Solar energy is one of the free sources, clean and environmentally friendly energy. Sun is the most important source of natural ultraviolet radiation that has a major role in the life of living beings. Industrial and medical applications of ultraviolet radiation have been clearly proven, like the production of vitamin D or treatment of many diseases, and also har...
Excessive ultraviolet (UV) radiation induces acute and chronic effects on the skin, eye and immune system. Personalized monitoring of UV radiation is thus paramount to measure the extent of personal sun exposure, which could vary with environment, lifestyle, and sunscreen use. Here, we demonstrate an ultralow modulus, stretchable, skin-mounted UV patch that measures personal UV doses. The patch...
s the most common type of cancer in the United States, skin cancer is a significant public health issue.1 It is estimated that in 2004 more han 1 million people will be diagnosed as having basal ell carcinoma and squamous cell carcinoma, and 2300 ill die. Melanoma, predicted to affect 55,100 individals, has a much higher mortality rate and will result in 900 deaths.2 Furthermore, although rates...
While few people would deny the appeal of a day in the sun there are some who seem to take it too far. In recent years the concept of 'tanning addiction' has become popular and several studies have supported the notion of viewing exposure to UV radiation as a form of substance abuse. In this article we will review some of the literature on sun seeking behavior.
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