2013年8月5日星期一

Cell phone use and cancer: new research suggests a link

Whether cellphone use causes cancer is an ongoing question with, as yet, incomplete answers. But a new study may shed light on the subject with the finding of "oxidative stress" in the saliva of cellphone users.
The experiment, led by Yaniv Hamzany, an ear, nose and throat specialist with Tel Aviv University's Sackler Faculty of Medicine, compared the saliva of 20 heavy cellphone users (those who spoke on their cellphones an average of 30 hours per month) with the saliva of 20 individuals, most of whom are deaf and either don't use a cellphone or use it for non-verbal functions like texting. The results: The heavy cellphone users showed more signs of oxidative stress.
What does that term mean? Essentially, cell damage. More specifically, it's a molecular imbalance between antioxidants and pro-oxidants, or free radicals. Free radicals are a natural byproduct of metabolism but are also linked with aging and, when they outnumber the antioxidants, cell damage occurs.

guān yú lǎo shī de lěng xiào huà jí jǐn 3 yuè bǎn jīng diǎn shōu jí 
1. lǎo shī wèn :“huí dá wèn tí wǒ men diǎn míng hǎo bù hǎo 。”
xué shēng qí dào :“bù hǎo ”。
yú shì lǎo shī wèn nǚ shēng :“tí wèn nán shēng hǎo bù hǎo ?”
“hǎo ”。
yòu wèn nán shēng :“tí wèn nǚ shēng hǎo bù hǎo ?”
“hǎo ”
“zhè bù dōu tóng yì mɑ ~&rdq

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