What is the bactericidal effect of ultraviolet radiation? How do plants contribute to moisture in the air? What are the causes of pneumonia? Explain how it inhibits alveolar gas exchange. What effect does acetic acid have on the flexibility of an eggshell?
No matter how high the intensity of non ionizing radiation is, it can not cause ionization in biological systems. NIR, however, produces other biological effects, such as heating effects and an induced current effect in vivo. WHO also stressed that substantial differences need to distinguish the ...
What type of radiation does the sun produce? What produces all light energy? Which alternative energy source is exhaustible? How is energy from the Sun distributed around Earth? Where does chemical energy come from? The ultimate source of the energy in food is ...
With each hour, the sun’s ultraviolet radiation produces irreversible damage, hastening the development of unsightly wrinkles. And with each year on the beach or rooftop, the sunbather increases his risk of getting skin cancer. B. Skin cancer is by far the most common form of cancer. An...
This first stage produces simple molecules, which can then recombine to make more complex molecules if this astonishing experiment is successful. What we're going to do now is warm the system a little to see what the ice does.第一步产生简单的分子，如果这个惊人的实验成功的话，这些简单的分子就...
Good examples of this are smoking, exposure to radiation (i.e. from cell phones), and overexposure to ultraviolet rays, which result in lung cancer, brain cancer, and skin cancer, respectively. Experts estimate that more than half the cases of cancer are preventable with lifestyle changes. ...
A、the absorption of sun radiation by the water vapor B、the absorption of sun ultraviolet ray radiation by the ozone C、the absorption of ground radiation by the air. 查看答案 单选题 What characterizes a ground-based inversion? A、convection currents at the surface B、cold temperatures C、...
There are several risk factors connected to welding. The arc emits extremely bright light and ultraviolet radiation, which may damage the eyes. Molten metal splashes and sparks can burn the skin and cause a risk of fire, and the fumes generated in welding can be dangerous when inhaled. ...
called psoralen, which makes the skin very sensitive to light, followed by exposure of the affected skin to a special lamp that generates only ultraviolet Aradiation. Occasionally, when the vitiligo patches are very limited, psoralen can be applied directly to the skin before ultraviolet A ...
What produces electromagnetic radiation? What is transferred by electromagnetic waves? What is electromagnetic radiation made up of? Which electromagnetic waves are used for communication? What does the energy of an electromagnetic wave depend on?