Essays on Ultraviolet Radiation

Cancer is one of the most common causes of death worldwide. Every year, various types of cancer kill millions of people. The problem of cancer disease is unique because of its complexity and importance to humankind. Cancers affect all segments of the population, causing enormous damage to society. Although malignant tumors are extremely diverse and complex for the perception, the risk factors and mechanisms of development of cancer are well known enough so that it becomes possible not only to heal, but also to engage in cancer prevention. Cancer is the most difficult and dangerous disease, since it can ...

English astronomer W. Herschel discovered planetary nebulae in about 1783. Nebulae received the name "planetary" on account of their external similarity with the images of distant planets, light wheels of which are different from the point images of the stars. “A planetary nebula is a beautiful object created during the final stages of the life of a star whose birth mass was between 1 and 8 solar masses” (“Planetary Nebulae”). A planetary nebula is an astronomical object consisting of an ionized gas shell and the central star, a white dwarf. All planetary nebulae originate from stars that are in ...

Introduction

There are environmental chemical processes which require light to react. These processes are called photochemical reactions. Photochemical reaction is commonly initiated due to the absorption of solar energy or light. When molecules absorb energy in the form of light, the atoms are converted in a transient excited state (Larson & Weber, 1994). This transition state or excited has completely different physical and chemical properties with the initial state of the molecule. The excited states also have more tendencies to react since they are considered stronger acids and stronger reductants that the initial state of the molecule. The excited state of ...

Discovery of ultraviolet light

Ultraviolet radiation is very significant in the tanning individual who are interested in making their skin look like leather as well as for vampires killing, yet it cannot be seen or else felt. The question is then, how did people discover existence the existence of ultraviolet light? Although light is comprehensively abundant when it comes from its primary source the sun, and it is tough to get hold of it because it travels at very high speed than anything else globally. Since light is subsequently insubstantial, for many years, individuals managed only to collect a few frequencies without knowing ...

Executive summary

The Affordable Care Act (ACA) addresses the challenges facing the health industry. The government has been implementing the provisions in incremental stages since 2010 and more changes are still underway. This report discusses the impact that this act has on indoor tanning services by analyzing the indoor tanning services tax, health insurance coverage duty on employers and the additional Medicare tax. Firstly, the indoor services tax applies to businesses offering tanning services as their predominant activity. However, the law provides tax exemptions to providers such as phototherapy services, qualified physical fitness facilities, spray-on tanning services and those selling tanning ...

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Abstract

The present review is aimed at providing an understanding on how the workplace contributes to the development of skin cancer. Five reviews (3 epidemiological data reviews, 1 meta-analysis, and 1 article) obtained from PubMed, involving a total of at least 3479 mortality and morbidity in skin cancer. These studies agreed on the initiating role of the workplace in the development of skin cancers, both malignant mesothelioma (MM) and non-melanoma skin cancers (NMSC), due to chronic exposure to carcinogens such as asbestos (Rushton, 2012; Boffetta, 2004; Romeo, 2004; ), mineral oils (Rushton, 2012), solar radiation (Rushton, 2012; Hannaford-Turner, Elder, Sim, Abramson, ...

Abstract

Cancer is one of the most dreaded diseases of all time. It was considered as a disease that cannot be remedied except for the medical breakthroughs in the past half century. So deep is cancer’s fear that it instills depression in its sufferers as soon as its name is mentioned. However, thanks to medical breakthroughs it is curable and the media emphasizes on this night and day. What is cancer and how does it spread, what are its kinds and how it influences the society? An attempt has been made answer these questions in the following article. Keywords: ...

What is IR?

IR or infrared is an electromagnetic radiation, one of radiations of light. This radiation has the longest wavelength in comparison with other visible light waves and less in comparison with radio waves, starting from the red edge of visible light up to 1mm. Due to the fact that infrared has the longest wavelength it contains the most thermal energy. Approximately more than half of the thermal energy from sun is received in form of infrared radiations, therefore the balance in emitted and absorbed radiations has great role in earth’s climate.

What is UV?

UV or Ultraviolet is also one of the ...

EXECUTIVE SUMMARY

Special designs have been made to suit various sports. This is important as it plays an important role in sports performance. Companies have resorted to good quality textile materials to design sportswear clothing. Sportsmen should wear comfortable costumes for them to perform well in their competition. When designing sportswear, the market has to be identified first. That is the design to be used, the materials required and footwear. The fabrics available should also be identified. The comfort of the wearer is also considered as this affects performance.

History of polymers

Polymers have been used for centuries to manufacture plastics. Due to advance ...

The authors sought to determine if commercially available plastic resin bottles and products, which are advertised as bisphenol a free, actually release chemicals that possess estrogenic activity. The researchers quantified the amount of chemicals, with estrogenic activity, which were leached into saline or ethanol extracts, released by many commercially available plastics. The researchers concluded that many plastics were wrongly characterized as not having estrogenic activity because they were extracted only with one solvent. These materials, the researchers also pointed out, were not exposed to any form of common-use stress. The authors also announced that they can identify existing compounds, ...

The paper is dedicated to the study of ecological balance and possible reasons that could lead to the consequent change of the world climate. In particular, two groups of hypotheses are analyzed. The first group deals with reasons that are conditioned by the changes in the energy received by the Earth from the Sun. The possible changes in the Sun itself and in the dust clouds that can affect the way the energy is taken by the planet are considered. The second group of hypotheses is dedicated to the changes in CO2 level and possible consequences it can lead ...