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The mission of EPA’s Radiation Protection Program is to protect human health and the environment from unnecessary exposure to radiation. This page provides basic information about the health effects of radiation. EPA uses current scientific understanding of the health effects of radiation exposure to create protective standards and guidance. Ionizing radiationHelpIonizing radiationRadiation with so much energy it can knock electrons out of atoms. Ionizing radiation can affect the atoms in living things, so it poses a health risk by damaging tissue and DNA in genes. has sufficient energy to cause chemical changes in cells and damage them. Some cells may die or become abnormal, either temporarily or permanently. By damaging the genetic material (DNA) contained in the body’s cells, radiation can cause cancer. Fortunately, our bodies are extremely efficient at repairing cell damage. The extent of the damage to the cells depends upon the amount and duration of the exposure, as well as the organs exposed. A very large amount of radiation exposure (acute exposure), can cause sickness or even death within hours or days. Such acute exposures are extremely rare. Radiation damage to tissue and/or organs depends on the dose of radiation received, or the absorbed dose which is expressed in a unit called the gray (Gy). The potential damage from an absorbed dose depends on the type of radiation and the sensitivity of different tissues and organs. The effective dose is used to measure ionizing radiation in terms of the potential for causing harm. The sievert (Sv) is the unit of effective dose that takes into account the type of radiation and sensitivity of tissues and organs. It is a way to measure ionizing radiation in terms of the potential for causing harm. The Sv takes into account the type of radiation and sensitivity of tissues and organs.
26 Jun 2017
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21:21
The term heavy metal refers to any metallic chemical element that has a relatively high density and is toxic or poisonous at low concentrations. Heavy metals are natural components of the Earth's crust. They cannot be degraded or destroyed. To a small extent they enter our bodies via food, drinking water and air. As trace elements, some heavy metals (e.g. copper, selenium, zinc) are essential to maintain the metabolism of the human body. However, at higher concentrations they can lead to poisoning. Heavy metal poisoning could result, for instance, from drinking-water contamination (e.g. lead pipes), high ambient air concentrations near emission sources, or intake via the food chain.
8 Jul 2017
26
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0:10
What extent can you push yourself for your ambition. Do you have the innate passion to face your challenges neck to neck? Here is a movie that will motivate you to raid extreme for your goals Be a rider when everybody else is roaming nowhere. #TheHimalayanRallywill drive to raid extreme in life. Director Deepak Anand is coming back with #TheRallyFilm to inspire millions. Produced by Rohit Kumar speeding on #25Aug2017
10 Jul 2017
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41:09
The term "to stage" a cancer means to describe the evident extent of the cancer in the body at the time that the cancer is first diagnosed. The stage of a cancer helps doctors understand the extent of the cancer and plan cancer treatment. Results of the treatment of similar Gleason score prostate cancer found at the same or similar stage can help the doctor and patient to make important decisions about choices of treatment to recommend or to accept. Cancer staging is first described using what is called a TNM system. The "T" refers to a description of the size or extent of the primary, or original, tumor. "N" describes the presence or absence of, and extent of spread of the cancer to lymph nodes that may be nearby or further from the original tumor. "M" describes the presence or absence of metastases -- usually distant areas elsewhere in the body other than regional (nearby) lymph nodes to which the cancer has spread. Cancers with specific TNM characteristics are then grouped into stages, and the stages are then assigned Roman numerals with the numerals used in increasing order as the extent of the cancer being staged increases or the cancer prognosis worsens. Prognosis is finally reflected by considering the patient's PSA score at presentation as well as their Gleason score in assigning a final stage designation. The American Joint Commission on Cancer AJCC system for prostate cancer staging is as follows: T designations refer to the characteristics of the prostate cancer primary tumor. T1 prostate cancers cannot be seen on imaging tests or felt on examination. They may be found incidentally when surgery is done on the prostate for a problem presumed to be benign, or on needle biopsy for an elevated PSA.
13 Jul 2017
34
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0:27
Tom Wills is a youthful vocalist musician which is performing overall visiting the nation over, universally and adrift. With over a time of involvement, Tom's Compositions succeed to a great extent on the quality of his creative ability. He is one of them who have a solid foundation in music. Tune in to his tracks and take after via web-based networking media for refreshes, occasions and sneak pinnacles.
14 Jul 2017
5
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0:50
Amongest the various popular options the first thing that you can do is hitting the Yellow Pages in case you are moving locally Ads of various sizes offer the consumer detailed information possible savings, and address information Search engines on internet will also provide you with favorable options to some extent
18 Jul 2017
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1:07
xtreme lash certified eyelash extention
21 Jan 2010
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5:02
Streetlife Randy Crawford & The Crusaders extention vers basscover Bob Roha
5 Jan 2013
140
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1:16
How to setup the Google Gmail Drive Extension in WindowsXP. Enjoy access and storage to many of your files through Google Gmail service. 3 gigs of portable service.
11 Feb 2007
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1:33
This is a little help video on how to change the file extension on windows XP. I made this video for a friend.
19 Feb 2007
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2:42
*******www.customtoolbardevelopment****/hire-firefox-developers.html (CTDI) stands with dedicated experts toolbar developer team, which provide Custom Firefox Extention Development Service with desire result to our customer and 100% satisfaction in first attempt. One can hire toolbar developer to fulfill his toolbar development related requirement.
30 Mar 2012
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15:45
*******therealreviewer**** Find out what happened after this video at *******therealreviewer****/the-hair-halo-flip-in-extentions-reviewed/
9 Nov 2012
157
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6:29
Harrah's, Meals On Wheels Urge Corporate Response to Help Solve Problem Hunger is a serious threat facing million of seniors in the United States, according to a groundbreaking national research study underwritten by the Harrah's Foundation, the philanthropic arm of Harrah's Entertainment, Inc. The study, released today by Harrah's and the Meals on Wheels Association Of America (MOWAA) Foundation, concludes that more than 5 million Americans - 11.4 percent of all seniors - face the threat of hunger. Seniors most likely to be at-risk are those with limited incomes, African Americans, Hispanics, the unmarried, renters, persons under age 70 and persons living in the South. "I challenge my colleagues in corporate America to join Harrah's by taking a leadership role in the Corporate Response to Senior Hunger program developed by Meals on Wheels," said Jan Jones, Harrah's senior vice president of communications and government affairs, in testimony prepared for the U.S. Senate's Special Committee on Aging.
6 Mar 2008
121
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1:11
A horrific tale of a young boy who decided to hide cookies from his brother.
9 Apr 2008
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2:51
It's kinda amazing the extent I'll go to just to be lazy.
29 Aug 2008
196
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