Radioactivity and radiation also have you

Radioactivity and radiation also have you

Immediately after the Chernobyl nuclear accident,
In our country for the prevention of radioactive contamination food imports
As a borrowing position, a reference value per kilogram
Vector figure of 370 was established.
Food containing radioactivity is much higher than it
Did you know that from a long time ago?
According to the report of the Nuclear Safety Research Association,
The per kilogram, respectively, 600 vector tea,
400 vector potato chips, dried shiitake vector 700,
I radioactivity of 2000 that contains the vector dried kelp.
Vector is a unit of radioactivity, radiation of a vector is an individual one second
This means to be released.


Referred to as "exposure", and that the human body is exposed to radiation.
Although it is easy to be confused because the two have the same pronunciation
And "exposure" of the atomic bomb is a little different meaning.
There are lines to radiation α, line β, line γ, and neutron radiation, mainly
You have to worry about radiation damage even if exposed to any radiation.
To radiation damage is due to cell will die by radiation
Such as burns and organ dysfunction occur and failure "appear soon."
Children born to pathogenesis and carcinogenesis and genetic disease
"Appear or late, failure appear across the generations" There is.
The greater the radiation dose, the higher risk of becoming either case.
Also exist where radioactivity is everywhere around us,
Radiation has always rife.
This is called "natural radiation" a naturally occurring radiation.


In Japan, the natural radiation exposure of 2.4 mSv per year is also of anyone, and
I have received from such food from the earth from space.
And seat belt is a unit mean radiation dose
Due to differences in the type and energy of radiation
Dose is expressed to account for the difference between the effects on the human body.
Means of a millimeter is 1000 minutes.
Radiation that we receive radiation from the potassium line (β)
It is said that the largest.
About 0.02% of the potassium is radioactive potassium Roh.
When you eat foods containing potassium is so,
I have always eaten radioactive potassium.
The total amount of radioactivity also elements that make up the human body,
Vector will also be approximately 7,000 per person.


Although it is not Godzilla monster, we have a radioactivity anyone,
I will always be that out of the radiation.
But do not worry.
Evidence that was harmful radiation and natural radioactivity in the nature of this long
Not yet found even once.
In theory There is no such thing as a safe dose of radiation of course absolute.
Experience in the long history of mankind, however,
I'd like to say is as safe natural radiation.
There is also a chance that we can measure the radiation close to flying.
Church in radiation measurement (goods), the
Kun "measure" of the handy type radiation meter
The lending me for free.

Global warming and greenhouse gas

Global warming and greenhouse gas

Global warming due to the increase of carbon dioxide in the atmosphere has become a problem.
Prevention of global warming in Kyoto Conference (COP3), of this carbon dioxide
Has been discussion about reducing emissions.
However, the gas heats the earth villain, greenhouse gas, ie,
There are some other than carbon dioxide.
They are, methane, nitrous oxide, CFCs, etc..
Mechanism of these gases warm the earth, is as follows.
Energy coming from the sun fell on the earth is in the form of electromagnetic waves.
Looking at the long wavelength side by side in order of electromagnetic waves, radio waves, infrared, visible light,
Will be ultraviolet, line X, and the line γ.
Energy of electromagnetic waves, it is large enough to shorter wavelengths.


Large part of the electromagnetic radiation from the sun is visible light and ultraviolet light.
Greenhouse gases in the atmosphere, and passes these on the ground most of the electromagnetic wave.
Amount of energy Earth receives the energy of these, the earth has received
Then released into space from the surface of the Earth, the infrared wavelength is longer decreased.
Greenhouse gas, has a nature to absorb these infrared,
Have played a role in insulating the atmosphere.
Prevents the chill off the earth to act reasonably and the greenhouse effect,
Kept to about 15 degrees Celsius average temperature, vital activity becomes possible.
When you increase the greenhouse effect, the temperature of the atmosphere is on the rise but will.


Well, let's look at the profile of the gas of the villain.
Methane is the main component of natural gas and coal gas, is colorless and odorless.
It also occurs from the dump.
Nitrous oxide is a colorless gas faintly sweet-scented, has the effect of a good lung,
It is also called "laughing gas" for face to inhale and convulsions.
Freon is also known as a gas that Deplete the Ozone Layer.
These gases, it is large greenhouse impact is characterized.
Methane is about 25 times of carbon dioxide, nitrous oxide at about 320-fold,
Freon is reached in about 8500 times.
Being the "main culprit" of global warming is carbon dioxide,
Amount because the vast majority of its occurrence.


However, from now on, my eyes can not look aside from methane is likely.
Currently, methane than before the Industrial Revolution
It is said that about 2.5-fold increase.
You say that increased with the use of coal and natural gas.
Sources of methane can also be found in the other.
From paddy fields is the occurrence of such as cows and belching.
Methane from rice paddies mechanism to occur are as follows.
Rice to take root in the soil, the
Anaerobic bacteria to produce methane is lived.
If the ground is dry, so that the methane consumption by bacteria living on the surface of the soil,
Leaving to the atmosphere is unlikely.
In the paddy fields, this bacteria does not live inside of it has sunk in the ground water, however.
In addition, acts as a stem of rice straw,
Will put methane into the atmosphere.
Nitrous oxide, by giving the fertilizer also
To occur has been confirmed.
Also various sources of greenhouse gas
Going to focus has become necessary.

Ozone layer barrier made life, only five millimeters

Ozone layer barrier made life, only five millimeters

About the Earth's atmosphere was able,
Volcanic gases and nitrogen such as hydrogen sulfide and carbon dioxide
It is thought that was the main component.
Early life that occurred there, the
Reserves of organic compounds have been synthesized by chemical reaction of natural
"Eat" was alive. You should of course if there are no reserve was Oshimai.
However, there is the appearance of oxygen (cyanobacteria) cyanobacteria perform photosynthesis
Begin to release, as long as there is a sustainable solar energy
Life cycle has started.
This is the scenario of the evolution of about two billion two years ago.
Oxygen, energy use due to oxidation,
And supporting the development of an organism to perform aerobic respiration that is
At the same time, in the atmosphere is changed to ozone in part by the sunlight,
Began to form a barrier to prevent the intense ultraviolet light.
Ozone layer, however, had emerged.


From sea to sea life near by it,
To expand the area to the ground and is now available.
The ozone layer, 10 km from the ground current
Widely distributed in the stratosphere near 50 km,
Actually is present as an area of ??fairly dilute ozone.
Under atmospheric pressure until the ground temporarily bring down the ozone layer
If you measured the thickness, not only to just five millimeters.
This thin barrier, called UV-B,
They also protect the life from ultraviolet rays that are capable of cutting a chemical bond.


However, the ozone layer is also a troubled existence in reverse.
Low ozone in the atmosphere has a greenhouse effect,
Causing pulmonary edema at high concentrations, respiratory and skin aging, even at low concentrations,
Harm and to promote carcinogenesis is because large.
Ozone generation is caused by industrial activity must be suppressed.
In 1982, Japan and the United Kingdom Antarctic team,
Than the average concentration of ozone over Antarctica
Got the data has been greatly reduced.
Discovery of the ozone hole is surprised the world.
And as a result of intensive research and intense debate of scientists,
Five years later, chlorine in the stratosphere is derived from the CFC
It came to be confirmed that interfere with the formation of ozone.


Now, is not only a decrease in ozone in the polar regions,
Has become significantly at mid-latitudes.
Sharp decline of amphibians, such as now, the absolute decline of wildlife,
Go in the world that is as well known.
Cause is complex, the impact of ozone depletion has been pointed out.
It has been most concerned about damage to humans, an increase of skin cancer,
Are also some movement to limit the activities of sunbathing and in the field.
Montreal Protocol of 1987, with subsequent further tightening of regulations,
The manufacture and use of CFCs has been banned or severely restricted,
Deterioration of the situation is being suppressed.
However, it stops the expansion of the ozone hole at the beginning of the next century
Is an unpredictable situation is whether.
The trend is the problem of the world's regulatory, legal regulations in Japan is the penalty
The question remains, such as point without.

Around us is full of chemicals have.

Around us is full of chemicals have.
They are convenient to us to enrich our lives.
On the other hand, sometimes with a toxic chemical.
Chemical also was considered safe and may result in damage to health and the environment
We have also found that.

Institutions of the United States are collecting information on chemical substances has been developed in the world,
At the end of 2000, more than 28 million chemical substances have been registered.
In addition, 4,000 kinds of chemicals are born every day.

What a nasty chemicals, as well as representing the toxic effect immediately into the body,
Even in the slightest intake, or the ability to raise the gun to accumulate in the body, offspring
Is that you have missed or nature. (Chemical substances are called environmental hormones)


"Contribution by chemical substances, the plus side"
From infectious diseases such as save lives and economy-revolutionary-convenience and comfort, we are rich,
Has contributed to mankind.

"The downside of chemical substances (Guy)"
To the global environment and the impact of abnormal reproductive function, hypersensitivity, and carcinogenicity pollution and phytotoxicity people,
"Harm" is becoming a problem.
And PCB (insecticide) and (polychlorinated biphenyls), DDT has been developed, for example when
It was used in large quantities is touted as a breakthrough product that is toxic to understand that after,
Now is not the most production.

Has also become a cause of water quality and soil pollution caused, the destruction of the environment, threaten the health of the people.
Risk of chemical substances have, has been revealed gradually in a long period of time continue to use.
We are not only "convenience", with the chemical substance of "harm risk ="
I think it is important to recognize properly.

Erode material our body and the environment
Dangerous substance that causes the poisoning murder
Substance of everyday life become upper respiratory health
Health food you want to know more
Chemical technology and materials to improve the environment