Friday, August 15, 2014

SWAT Radon Reduction - Radon Gas Issues During the Winter Months - Is Yo...











Winter brings families closer as
they spend more time indoors together, but that indoor time can lead to a
significant increase in dangerous radon gas exposure. Testing your home
for radon gas during the winter is an important part of keeping your
family safe. The lack of airflow and increased time indoors that many
families experience all winter long can greatly increase the levels and
exposure time to radon gas, creating a danger in homes all over the
world.

Why Is Radon More Dangerous In the Winter?

• Homes
Are Sealed - Radon levels go up in the winter because people close up
their homes to keep out the cold. When your windows are closed and
sealed for winter and air stops moving in and out of your home on a
regular basis, radon gas has a chance to build up with no way to escape.
This sealing makes winter the most dangerous time of the year when
you're worried about what may be leaking into your home. Carbon monoxide
deaths go up during the winter, and silent radon exposure that can lead
to lung cancer goes up right alongside it.

• People Stay Indoors
- Winter months bring inclement weather in with them, leaving your
family stuck indoors when they would otherwise be out. When you stay in
your home for the winter, you increase the exposure time you and your
family have around anything in the air inside your home. Radon gas
buildup is higher in the winter, and you and your family are spending
more time in the house breathing it.

How Does Radon Get In During the Winter?


Cracks - Homeowners often have small cracks in the floor and walls of
their home that end up being vulnerable to the elements. Radon present
in the dirt around and under your home can leech in through cracks and
joints throughout the house. While this radon would simply disappear
into the atmosphere outdoors, it builds up in the air inside your home
when windows are closed and areas are weatherproofed for winter.


Gaps And Cavities - The gaps under your floor and in the walls can be a
simple vector for radon gas looking for a way into your home. Radon
built up in the dirt around and under your house can seep in through the
external openings and cracks in your siding, getting caught in the
insulating gaps between your home's exterior and interior. This gas will
slowly leak into the living areas of your home, exposing you and your
family to danger. The sealed atmosphere of most homes during winter
makes it easier for radon gas to seep in and get stuck.


Concrete Foundation -- Concrete is a porous material, and radon gas can
pass through the concrete foundation because of this. The radon gas is
small enough to pass through even the smallest of voids and openings,
even small enough that they may not be visible without magnifying
equipment.

What Can You Do?

The first step toward dealing
with a winter radon exposure problem is getting your home tested for the
presence of the hazardous gas. SWAT Radon Reduction offers radon
testing options that can help make sure your family is protected from
the long term cancer risks associated with radon gas. If you find out
that your home's winter radon risk is higher than it should be, SWAT
Radon Reduction can help you lower radon levels significantly at a
reasonable price in order to keep your family safe. Call SWAT Radon
Reduction with any questions regarding radon gas testing or radon
reduction: 1-800-667-2366 or visit the SWAT Radon Reduction website at:
www.RadonSystem.com

Thursday, August 14, 2014

电脑辐射的四大危害

使用电脑的你要注意电脑辐射的四大危害

  提醒:电脑辐射最大处在后面,不在屏幕



  1、电脑辐射污染会影响人体的循环系统、免疫、生殖和代谢功能,严重的还会诱发癌症、并会加速人体的癌细胞增殖。`

  2、影响人们的生殖系统主要表现为男子精子质量降低,孕妇发生自然流产和胎儿畸形等。2.}N

  3、影响人们的心血管系统表现为心悸、失眠,部分女性经期紊乱、心动过缓、心搏血量减少、窦性心率不齐、白细胞减少、免疫功能下降等。5S

  4、对人们的视觉系统有不良影响由于眼睛属于人体对电磁辐射的敏感器官,过高的电磁辐射污染还会对视觉系统造成影响。主要表现为视力下降,引起白内障等

  防止电脑辐射的方法:

  上完网后洗脸可以减少70%的辐射

  提醒:电脑辐射最大处在后面,不在屏幕

电脑摆放位置很重要。尽量别让屏幕的背面朝着有人的地方,因为电脑辐射最强的是背面,其次为左右两侧,屏幕的正面反而辐射最弱。以能看清楚字为准,至少也要50厘米到75厘米的距离,这样可以减少电磁辐射的伤害。

Wednesday, August 13, 2014



The risks to human health posed by ionizing radiation are well known.

Radon gas is by far the most important source of ionizing radiation among those that are of natural origin.

Radon (222Rn) is a noble gas formed from radium (226Ra), which is a decay product of Uranium (238U).

Uranium and radium occur naturally in soils and rocks.
Other decay products of uranium include the isotopes thoron (220Rn)
and actinon (219Rn).

Radon gas, which has a half-life of 3.8 days, emanates from rocks and soils and tends to concentrate in enclosed spaces like underground mines or houses.

It is a major contributor to the ionizing radiation dose received by the
general population.

When radon gas is inhaled, densely ionizing alpha particles emitted by deposited short-lived decay products of radon (218Po and 214Po) can interact with biological tissue in the lungs leading to DNA damage.

Cancer is generally thought to require the occurrence of at least one mutation, and proliferation of intermediate cells that have sustained some degree of DNA damage can greatly increase the pool of cells available for the development of cancer.

Since even a single alpha particle can cause major genetic damage to a cell, it is possible that radon-related DNA damage can occur at any level of exposure.

Therefore, it is unlikely that there is a threshold concentration below which radon does not have the potential to cause lung cancer.

Health effects of radon, most notably lung cancer, have been investigated for several decades.

Initially, investigations focused on underground miners exposed to high concentrations of radon in their occupational environment. However, in the early 1980s, several surveys of radon concentrations
in homes and other buildings were carried out, and the results of these surveys, together with risk estimates based on the studies of mine workers, provided indirect evidence that radon may be an important cause of lung cancer in the general population.

Recently, efforts to directly investigate the association between indoor radon and lung cancer have provided convincing evidence of
increased lung cancer risk causally associated with radon, even at levels commonly found in buildings.

Risk assessment for radon both in mines and in residential settings have provided clear insights into the health risks due to radon.

Radon is now recognized as the second most important cause of lung cancer after smoking in the general population.

(Sources: WHO HANDBOOK ON INDOOR RADON)
 http://www.nrsb.org/pdf/WHO%20Radon%20Handbook.pdf