6 items | 1 visits
the idea for outline number 2
Updated on Mar 06, 09
Created on Mar 02, 09
Category: Schools & Education
URL:
Solita Han's List: Otline 2 Radiation and the Human body HF/VHF radiation
-
-
The as-yet unbuilt school tower has raised concerns among people who say the high-frequency radiation emitted by the towers poses an unacceptable health risk to children.
-
-
Mar 02, 09
the effect of HF radiation for example it change the behavior
-
Most relevant for biological effects of HF-fields is the absorbed power in the body. The reference quantity is the specific energy absorption rate (SAR, measuring unit: Watt per kilogram – W/kg). It defines the power (energy per unit of time) absorbed per kilogram of tissue. A whole body exposure due to high frequency electromagnetic fields which corresponds to SAR-values of 4 W/kg on the average results in a temperature rise in humans of approximately 1°C. For comparison: normal muscle activity corresponds to 3 to 5 W/kg.
-
Many studies report biological effects at low intensities of high frequency radiation. For example changes in sleeping behaviour or an interference with the performance of the brain are discussed. Thermal dependence of the permeability of the blood-brain-barrier is not finally concluded yet. Most studies showed, however, that the function of the barrier is maintained at field intensities caused by mobile phones. Parameters of the blood, the immune system or certain hormones (e.g. melatonin) were examined in animal models and also in humans. Actual topics of research include the investigation to clarify a possible relationship between cancer diseases and high frequency fields. Many of these results were not reproduced independently. Above all a conclusive mechanism is not available to explain the interference of high frequency fields with the mentioned biological parameters. In many cases it is unclear whether the observed effects have an impact on human health.
-
-
Mar 04, 09
the effect of Radiation to the unborn baby
-
The exposure of an unborn baby to radiation is referred to as prenatal radiation exposure
-
-
-
In general, the amount and duration of radiation exposure affects the severity or type of health effect. There are two broad categories of health effects: stochastic and non-stochastic.
Stochastic Health Effects
Stochastic effects are associated with long-term, low-level (chronic) exposure to radiation. ("Stochastic" refers to the likelihood that something will happen.) Increased levels of exposure make these health effects more likely to occur, but do not influence the type or severity of the effect.
-
-
Mar 06, 09
the health effect from radiation cancer, thyroid disease,immune system, genetic effect and birth defects, Never system
-
OTHER RADIATION HEALTH EFFECTS
-
OTHER RADIATION HEALTH EFFECTS
-
-
-
Effect of Radiation on The Human Body (unit: gray (Gy))
100 Unconsciousness or coma. Death within several hours 10 Destruction of bone marrow, severe radiation sickness and reduced white blood cells and platelets, Death within 30 days 1 Nausea and vomiting. Reduced cell formation in bone marrow, temporary reduction in white blood cells 0.1 Changes appear in lymphocytes produced by bone marrow 0.01 No Apparent symptoms -
Effect of Radiation on The Human Body (unit: gray (Gy))
100 Unconsciousness or coma. Death within several hours 10 Destruction of bone marrow, severe radiation sickness and reduced white blood cells and platelets, Death within 30 days 1 Nausea and vomiting. Reduced cell formation in bone marrow, temporary reduction in white blood cells 0.1 Changes appear in lymphocytes produced by bone marrow 0.01 No Apparent symptoms
-
1 - 6 of 6
20 items/page
List Comments
(0)
List Info