Questions tagged [radiation]

Ionizing electromagnetic waves, usually harmful to most biological beings.

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Is Near-infrared focused light safe for your eyes?

I found a new product, but I'm afraid it's not safe. Can you help me understand what the safety limits are when it comes to near-infrared light focused on your eyes is? I'm assuming the wavelength ...
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25 views

Can high energy photoelectrons damage cell membranes?

I've read that in addition to ionizing radiation causing damage to DNA through direct absorption, but DNA can also be damaged through photoelectrons with enough energy. The thing I was wondering is ...
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32 views

Effects of X-ray exposure on upcoming pregnancies

Recently we had a little fight with my girlfriend about the risks of genetic diseases for our potential baby. The thing is that she had her medical check recently and it included an X-ray examination ...
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33 views

What are the methods of prophylaxis against exposure to radioactive isotopes?

Potassium iodide is used as prophylaxis to prevent illness when one is likely to be exposed to Iodine-131 and other radioactive isotopes of iodine. Are there any other prophylactic treatments for ...
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49 views

Is UV radiation more likely to cause mutations during mitosis?

According to Life: The Science of Biology (10th edition), UV radiation might cause the formation of pyrimidine dimers, which are the primary cause of skin cancer in humans. Are mutations more likely ...
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27 views

What gives researchers a reason to test the Radiation Resistance of organisms?

I was reading about the Thermococcus Gammatolerans and its absurdly high radiation resistance, when something occurred to me. What reason did anyone have in the first place to subject this thing to ...
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229 views

Why bananas accumulate a radioactive isotope of potassium (K40)?

A quick google search reveals many pages that intend to calm consumers down and assure them that quantities of radioactive potassium in bananas (K40 isotope) is not sufficient to be concerned about, e....
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100 views

Absorbed dose from a CT scan with relation to radiation accidents

I read somewhere that the average CTDIvol in CT scans at hospitals is ~40 mGy. This translates to the 'radiation intensity' at the center of the person, and can also be roughly interpreted as an '...
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31 views

Why isolated chlorophyl emits red light?

If we observe isolated chlorophyl solution with UV light, chlorophyl is seen as red. explanation suggests that when specific atom of chlorophyl absorbs UV light, atom gets excited and in a short time ...
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19 views

What are the effect of radioactivity on grey wolves in Chernobyl?

I am doing some research about the effects that radioactivity has and is having on grey wolves in Chernobyl and more particularly on their genetics, but maybe also looking at the populations in the ...
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28 views

Radiation mutation breeding in plant seeds: practical aspects

I did read some seed irradiation papers and they all use Gy as unit of measure, however I have never seen seed weights reported. How did they calculate that, since Gy is J/kg? Differencies aside ...
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54 views

Does the body use radio frequencies in the range of frequencies used in mobile phone networks?

I read something related to the biological effects of "mobile phone radiation". It was not as far from reality as one might expect with this topic. The context was about the acceptable distance of ...