scholarly journals Study of UV Transmission through a Few Edible Oils and Chicken Oil

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
K. Anil Kumar ◽  
K. Viswanathan
Keyword(s):  
Uv Radiation ◽  
Vegetable Oils ◽  
High Latitude ◽  
Edible Oils ◽  
Atmospheric Ozone ◽  
Human Beings ◽  
Neem Oil ◽  
Solar Uv ◽  
The Tropics ◽  
Absorption Characteristics

Effects of solar UV radiation on the biosphere are well known and a lot of studies are going on to reduce its dangerous effects on human beings. Atmospheric ozone layer is not uniform over the globe, so that less ozone over tropics makes it receive more UV insolation, than high latitude places. People in the tropics are continuously exposed to high UV dosage, leading to skin reddening and the dangerous “sun stroke.” In southern India people use some vegetable oils to protect the skin from sun heat. Studies of “sun stroke” show that people having skin of moderate colour are the main victims. In some parts of Southern Kerala like Kottayam, Ernakulam, and Alappuzha traditional people were using oil extracted from chicken, called “chicken oil,” for the treatment of “heat burns” and other types of burns. This motivated us to study the UV absorption characteristics of chicken oil, and compare them with that of other commonly used vegetable oils. It is found that the chicken oil shows maximum absorption of UV radiation of about 85%, and neem oil shows absorption of about 60%. Other oils show comparatively very low absorption of UV radiation. So this property of chicken oil may be the reason for using it as remedy for heat burns.

scholarly journals The Early Days of Personal Solar Ultraviolet Dosimetry

Atmosphere ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 125 ◽  
Author(s):  
Brian Diffey
Keyword(s):  
Uv Radiation ◽  
Human Exposure ◽  
Ground Level ◽  
Uv Exposure ◽  
Population Exposure ◽  
Atmospheric Ozone ◽  
Quantitative Understanding ◽  
Solar Uv ◽  
The Impact ◽  
Solar Ultraviolet

In the early 1970s, environmental conservationists were becoming concerned that a reduction in the thickness of the atmospheric ozone layer would lead to increased levels of ultraviolet (UV) radiation at ground level, resulting in higher population exposure to UV and subsequent harm, especially a rise in skin cancer. At the time, no measurements had been reported on the normal levels of solar UV radiation which populations received in their usual environment, so this lack of data, coupled with increasing concerns about the impact to human health, led to the development of simple devices that monitored personal UV exposure. The first and most widely used UV dosimeter was the polymer film, polysulphone, and this review describes its properties and some of the pioneering studies using the dosimeter that led to a quantitative understanding of human exposure to sunlight in a variety of behavioral, occupational, and geographical settings.

scholarly journals Episode of unusual high solar ultraviolet radiation in central Europe due to dynamical reduced stratospheric ozone in May 2005

2005 ◽  
Vol 5 (5) ◽  
pp. 10409-10420 ◽  
Author(s):  
C. Stick ◽  
K. Krüger ◽  
N. H. Schade ◽  
H. Sandmann ◽  
A. Macke
Keyword(s):  
Ultraviolet Radiation ◽  
Uv Radiation ◽  
Stratospheric Ozone ◽  
Solar Ultraviolet Radiation ◽  
Solar Uv ◽  
Resultant Increase ◽  
The Tropics ◽  
Effective Radiation ◽  
Ozone Episodes ◽  
Solar Ultraviolet

Abstract. In late May this year unusual high levels of solar ultraviolet radiation were observed in Europe. In Northern Germany the measured irradiance of erythemally effective radiation exceeded the climatological mean by more than about 20%. An extreme low ozone event for the season coincided with the high solar elevation angles during late spring leading to the highest value of erythemal UV-radiation ever observed at this location in May. This ''ozone mini-hole'' was caused by an elevation of tropopause height accompanied with a poleward advection of natural low total ozone from the tropics. The resultant increase in UV-radiation is of particular significance for human health. Dynamically induced low ozone episodes that happen around the summer solstice can considerably enhance the solar UV-radiation in the mid latitudes and therefore contribute to the UV-burden of people living in the mid latitudes.

scholarly journals Episode of unusual high solar ultraviolet radiation over central Europe due to dynamical reduced total ozone in May 2005

2006 ◽  
Vol 6 (7) ◽  
pp. 1771-1776 ◽  
Author(s):  
C. Stick ◽  
K. Krüger ◽  
N. H. Schade ◽  
H. Sandmann ◽  
A. Macke
Keyword(s):  
Ultraviolet Radiation ◽  
Central Europe ◽  
Uv Radiation ◽  
Solar Ultraviolet Radiation ◽  
Solar Uv ◽  
The Tropics ◽  
Sky Conditions ◽  
Effective Radiation ◽  
Ozone Episodes ◽  
Solar Ultraviolet

Abstract. In late May 2005 unusual high levels of solar ultraviolet radiation were observed over central Europe. In Northern Germany the measured irradiance of erythemally effective radiation exceeded the climatological mean by more than about 20%. An extreme low ozone event for the season coincided with high solar elevation angles and high pressure induced clear sky conditions leading to the highest value of erythemal UV-radiation ever observed over this location in May since 1994. This hereafter called "ozone mini-hole" was caused by an elevation of tropopause height accompanied with a poleward advection of ozone-poor air from the tropics. The resultant increase in UV-radiation is of particular significance for human health. Dynamically induced low ozone episodes that happen in late spring can considerably enhance the solar UV-radiation in mid latitudes and therefore contribute to the UV-burden of people living in these regions.

scholarly journals INVESTIGATION OF QUALITATIVE PARAMETERS IN SOAP PRODUCED FROM BLEND OF NEEM AND CASTOR OIL

2021 ◽  
Vol 36 (2) ◽  
pp. 20-25
Author(s):  
A.H Usman ◽  
B. Mukhtar
Keyword(s):  
Fatty Acids ◽  
Vegetable Oils ◽  
Chemical Compound ◽  
Castor Oil ◽  
Edible Oils ◽  
Neem Oil ◽  
Different Types ◽  
Soap Production

Soap is a chemical compound formed by interaction of fatty acids and metal radicals. Different types of vegetable oils have been found to be good candidates for soap production due to their saponifiable nature. However, edible oils are often expensive to use for soap production due to competing demand between commercial and domestic buyers. So, in this work, blend of nonedible neem and castor oils were used at different proportions to produce various soap samples. The foregoing was achieved via the two well-known processes of soap production, that is; the hot and cold processes. The work investigated the parameters that influence the quality of soap and determined their optimum values using various blends of the oils. Six samples were produced, and their properties analyzed and compared with two commercial samples to determine a blend with the most desirable qualities. The yield, foamability, pH, hardness and cleansing power of the produced soap samples were determined. It was found that the blend of 60 ml neem oil and 40 ml castor oil was the best with a yield of 70.4%, foamability of 11.8 cm, pH of 10.42 and a high cleansing power. The results were found to be consistent with those of the two commercial samples used as controls. Keywords: Castor, cleansing power, foamability, hardness, neem, oil, soap samples

scholarly journals Exposome extrinsic factors in the tropics: the need for skin protection beyond solar UV radiation

2021 ◽  
pp. 146921
Author(s):  
Marcelo de Paula Corrêa ◽  
Alexandre Germano Marciano ◽  
Vanessa Silveira Barreto Carvalho ◽  
Plínio Marcos Bernardo de Souza ◽  
Júlia da Silveira Carvalho Ripper ◽  
...  
Keyword(s):  
Uv Radiation ◽  
Skin Protection ◽  
Extrinsic Factors ◽  
Solar Uv Radiation ◽  
Solar Uv ◽  
The Tropics
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