Презентация SOLAR RADIATION, ITS GENERAL BIOLOGOCAL AND HYGIENIC VALUE онлайн
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- Тип файла:ppt / pptx (powerpoint)
- Всего слайдов:16 слайдов
- Для класса:1,2,3,4,5,6,7,8,9,10,11
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Слайды и текст к этой презентации:
№1 слайд
Содержание слайда: Lecture 4
SOLAR RADIATION, ITS GENERAL BIOLOGOCAL
AND HYGIENIC VALUE
№2 слайд
Содержание слайда: Solar radiation is integral flow of radiation, emitting by Sun
From the physical point of view solar energy is a flow of electromagnetic radiation characterized by a various wave-length
№3 слайд
Содержание слайда: Solar radiation is a great medical and prophylactic factor
It influences on all physiological processes in the organism, changing metabolism, general tone and efficiency
№4 слайд
Содержание слайда: Reactions of organisms depend on:
the type of radiation
the length of electromagnetic waves
the absorption of these waves by tissues
№5 слайд
Содержание слайда: Ultra-violet part of the solar spectrum
it is a wave flow in the range from 200 up to 400 nanometers
№6 слайд
Содержание слайда: General biological influence of ultra-violet rays
local changes in the colloidal state of cellular and tissue proteins
Образование cleavage product of protein molecules such as hystamin, choline
influence on protein, fat, carbohydrate and mineral metabolism
increase in the organism protection
№7 слайд
Содержание слайда: Ultra-violet radiation with the wave range:
from 400 up to 320 nanometers – range A, UV-A
from 320 up to 275 nanometers – range B, UV-B
from 275 up to 180 nanometers – range C, UV-C
№8 слайд
Содержание слайда: Specific biological influence of ultra-violet rays typical of a certain wave range
range A, UV-A – leads to erythematous-suntan influence
range B, UV-B – antirachitic and low bactericidal influence
range C, UV-C – causes a damaging influence on a biological tissue, skin, eyes
№9 слайд
Содержание слайда: UV-A
The mechanism of origination of ultra-violet erythema is connected with the vasodilating effect of histamine and the histamine-like substances formed under ultra-violet radiation.
№10 слайд
Содержание слайда: UV-B
Revealed in participation of UV radiation of this range in the synthesis of vitamin D
The result of UV-irradiation on the skin is the transformation of 7-dehydrocholesterol in vitamin D3
№11 слайд
Содержание слайда: UV-C
Under the influence of natural ultra-violet irradiating of a bactericidal spectrum sanation of the atmosphere, water, soil takes place
№12 слайд
Содержание слайда: Visible part of the solar spectrum
The visible part of the solar spectrum is a wave range from 400 up to 760 nanometers
The special hygienic value of light is its influence on the vision function
№13 слайд
Содержание слайда: Infra - red radiation
According to the biological activity infra-red rays are divided into short-wave with the wave range from 760 up to 1400 nanometers and long-wave with the wave range from 1500 up to 25000 nanometers
№14 слайд
Содержание слайда: Absorption of IR rays by the skin is determined by the wave length
Rays with the length from 1500 to 3000 nm are absorbed by superficial skin layer
Rays with the length 1000 nm passes through the epidermis, shorter IR waves reach the subcutaneous fat
№15 слайд
Содержание слайда: During prolonged radiation by infra-red radiation the temperature of pulmonary tissue, brain, kidneys and muscles increases. Irradiation by infra-red rays influences on the immunobiological reactivity of the organism
During prolonged radiation by infra-red radiation the temperature of pulmonary tissue, brain, kidneys and muscles increases. Irradiation by infra-red rays influences on the immunobiological reactivity of the organism
№16 слайд
Содержание слайда: The most marked unfavorable influence of IR radiation is observed in industrial conditions
In glass-blowers and other workers, contacting with intensive flows of IR radiations, there is decrease in electric sensitivity of eyes, weakening of the conditionally reflex vascular reaction. Infra-red radiation if the wave-length is less than 1400 nanometers leads to serious changes in cornea as cataract
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