COMMON LOCAL TOXIC HAZARDS

CAR------- is a chemical that can cause cancer.
CI----------is an agent that can cause cancer.
NO---------can be chemicals, viruses, hormone, ionizing radiation, or solid materials.
GEN--------produce cancer by changing the information that cells receive from their DNA, causing immature cell to accumulate in the body rather than differentiate into normal functional cells

hehe...just the hints..to describe about...???... CARCINOGEN...=)

There are three types of carcinogens: Physical, Biological and Chemical. Physical types can be caused by ionizing radiations, such as x-rays, ultraviolet radiation from sun light and by mineral fibers, such as those from asbestos. These carcinogens damage the DNA by making holes in the DNA strains or by making clumps of DNA stick together when they should be separated. Chemical carcinogens act by binding form molecules to DNA strains and then causing the genetic code to be misread. Benzopyrene is an example of such a carcinogen and this is found in cigarette smoke. Biological carcinogens may be viral or bacterial. An example of a virus that causes cancer is the human T-cell lymphyocytic virus which is being linked to Lymphoma.

neurotoxin

have you hear about the word 'neuro'?...

It is about the

words for concepts and topics in relation to the brain and neuroscience, that is about nervous system.

So, neurotoxin is a chemical that affects the nervous system, and can adversely affect intelligence, cause memory deficits, and result in cognitive and behavioral problems and sexual dysfunction, among other problems.

resources: http://www.cwac.net/toxic_chemicals/index.html

by : nitt

~environmental health~

hye.....im back....o0opps..forgot..im adawiah... emm.now...i like to share to you about environment health.. i'm very sure many of you know about that but who those still blur2 about that..you can read this statement..

Environmental health addresses all the physical, chemical, and biological factors external to a person, and all the related factors impacting behaviours. It encompasses the assessment and control of those environmental factors that can potentially affect health. It is targeted towards preventing disease and creating health-supportive environments. This definition excludes behaviour not related to environment, as well as behaviour related to the social and cultural environment, and genetics.

i hope you understand what is mean..see you in next entry...bye~

reference: http://www.who.int/topics/environmental_health/en/

by : *adawiah*

Poem or Cry for help? TOXIC WANNABE?

Walk and Wander.
Cry and Ponder.
What will be,
Will be.
Until one day
I am free,
from the pain,
Brought on,
by the Toxic Wannabe.

Lets us share about the meanings of nice article above..

Its is a Poem, a statement
with veiled purpose ...
From the abstract could be a troll problem ...
closer up could be many things.

But if the soul wants to be free ...
then be free but acknowledge that
freedom isn't free ... its a different kind of
pain, a strengthening pain instead of a debilitating one.

Resources:http://answers.yahoo.com/question/index

by: nitt

ReducinG Toxic ProDucT In YouR HomE

There are alternatives to toxic products for every room in the house. Select a room to see what you can do to have a home that is healthier for you, your family, your pets and the environment.


Bathroom
Laundry room
kitchen
Bedroom
Living room
Garden
Lawn Care

resource: Department of environmental protection

by: *esyahhzul*

-dose response-

hye...i'm Ida..emm...adawiah share with you about the dose-response curve right???

i have new information to you..i hope what i share to this entry will help you to understand about dose response curve...

Five centuries ago, the physician and alchemist Paracelsus said that:

“All substances are poisons: there is none which is not a poison.

The right dose differentiates a poison and a remedy.”

Paracelsus (1493-1541)

By this, he meant essentially that a substance in too great an amount can be dangerous, yet in an extremely small amount can be relatively harmless. Every chemical element has a spectrum of possible effects on a particular organism. For example, selenium is required in small amounts by living things but may be toxic or increase the probability of cancer in cattle and wildlife when it is present in high concentrations in the soil. Copper, Chromium and manganese are other chemical elements required in small amounts by animals but toxic in higher amounts.

DOSE RESPONSE

From these, we can know the effect of a certain chemical on an individual depends on the dose. This concept is termed dose response. Dose dependency can be represented by a generalized dose-response curve such as that shown in Figure 1.

When various concentrations of a chemical present in a biological system are plotted against the effects on the organism, two things are apparent:

· Relatively large concentrations are toxic and even lethal (points D, E and F in Figure 1).

· Trace concentrations may be beneficial for life (between points A and D); and the dose-response curve forms a plateau of optimal concentration and maximum benefit between two points (B and C). Points A, B, C, D, E and F in Figure 1 are important thresholds in the dose-response curve. Unfortunately, the amounts at which points E and F occur are known only for a few substances, for a few organisms, including people; and the very important point D is all but unknown. Doses that are beneficial, harmful, or lethal may differ widely for different organisms and are difficult to characterize.

Source :

http://www.dose-response.com/

http://aquaticpath.umd.edu/appliedtox/dose-response.pdf

http://www.eoearth.org/article/Dose-response.pfd
prepared by : * ieda 4-ever*

TOxiC????

Do you know what is toxic ??

Do you know toxic is very dangerous to our body??

Toxicity is the degree to which a substance is able to
damage an exposed organism.
Toxicity can refer to the
effect on a whole organism, such as an animal, bacterium,
or plant, as well as the effect on a substructure of the organism, such as a cell (Cytotoxicity) or an organ (organotoxicity), such as the liver (hepatotoxicity).
By extension, the word may be metaphorically used to describe toxic effects on larger and more complex groups, such as the family unit or society at large.

A central concept of toxicology is that effects are dose-dependent; even water can lead to water intoxication when taken in large enough doses, whereas for even a very toxic substance such as snake venom there is a dose below which there is no detectable toxic effect.

resource: www.wikipedia.com

by:*esyahzul*

DOSE-RESPONSE RELATIONSHIP

Hye….adawiah come back with new information. I hope you all enjoy with entry in this blog…for this tyme I will share to you…about…about what ya…about DOSE-RESPONSE RELATIONSHIP…

Did you know about that???NNNOOO???oh…so sad…BUT..its ok..i will share with you.dont worry la...but you must finish to read my entry..hahhaa…ok..

emm…maybe now you are thinking what it’s DOSE-RESPONSE RELATIONSHIP…I will tell you about the definition about DOSE-RESPONSE RELATIONSHIP..

"DOSE-RESPONSE RELATIONSHIP describes the change in effect on an organism caused by differing levels of doses to a stressor after a certain exposure time. This may apply to or to populations. For your information DOSE-RESPONSE RELATIONSHIP known as exposure-response relationship".

Studying dose response, and developing dose response models, is central to determining "safe" and "hazardous" levels and dosages for drugs, potential pollutants, and other substances to which humans or other organisms are exposed. These conclusions are often the basis for public policy

Did you know what is DOSE-RESPONSE MODEL??

This is the DOSE RESPONSE MODEL

It should be realised that dose-response relationships will generally depend on the exposure time. The quantifying the response after a different exposure time leads to a different relationship and possibly different conclusions on the effects of the stressor under consideration. This limitation is caused by the descriptive nature of the approach.

O0oppsS…guy I have to go to class now…emm…i hope the simple information above can make you understand about DOSE-RESPONSE CURVE..I will share to next tyme k??maybe after my class..hehhe..wait for my entry for next episode…hahaha…

Bubye~

references :

http://en.wikipedia.org/wiki/Dose-response_relationship,http://www.curvefit.com/introduction89.htm

by : *adawiah*