Wednesday, July 05, 2006

DDT and you


Ok, back to the DDT thing.
I guess I'm out of the scientific link here- living in the real world and all.
I just read this story on the residual effects of DDT.

First some chemistry:
DDT, an organochlorine, persists in the environment long after use, accumulating in the food chain and in fatty tissues of animals and humans.

Over time, it degrades into DDE and DDD, which have similar chemical and physical properties.

Thirty-three years after its use was banned in the US, DDT is still detectable in about five to 10% of people, while DDE is detectable in nearly everyone.

Now comes the chicken little act.

The UC Berkeley researchers measured blood levels of DDT and one of its breakdown products, DDE, in 360 pregnant women, the majority of whom were born in Mexico, where agricultural use of the chemical was only banned in 2000.

Well it IS California, so they only had Illegals coming to free healthcare to work with.

For each tenfold increase in DDT levels measured in the mother, the team found a corresponding two to three-point decrease in the children's mental development scores at 12 and 24 months.

Children with the highest DDT exposures in the womb were associated with a seven to 10-point decrease in test scores, compared to the lowest exposures.

When the children's physical skills were measured, there were two-point decreases in children's scores at six and 12 months for each tenfold increase in DDT levels in the mothers.

Similar, but weaker effects, were linked to DDE exposure.

Ok, I only have my high school math here, but isn't a tenfold increase like multiplying by 10? You have say 10mg of DDT and a tenfold increase would be 100mg- right?
Then you measure it on a percentage scale, so one percent would be .001 of the standard. A two point decrease would be .002.
Or am I missing something?

Professor Richard Sharpe, of the Medical Research Council's Human Reproductive Sciences Unit in Edinburgh, said: "The older the woman before her first breastfeeding episode and the longer and the higher her DDT exposure has been, the greater will be the amount of chemical delivered to the baby.

"So the first baby gets the worst of the chemicals stored in the mum's fat.

"There may also be a bonus to the mum in that she is ridding herself and her fat tissue of the chemicals in question and because some of these chemicals are potentially implicated in the development of breast cancer - the breast is mainly fat.

"This could be one of the ways in which early breastfeeding protects against breast cancer."

Ok, I can see the floodgate analogy with flushing out accumulated DDT.
But, ummmm- is my high school biology wrong? I was taught that milk comes from mammary glands, not the fat- or is it just leaching into the milk?

Ohhhhhhhhhhh,,,,,,,,so confused.
And here I thought that those illegals just didn't want to bother to learn English- not that they were to pendejo to learn.

No comments:

Post a Comment