Sunday, April 15, 2007

Cleaning agent tied to abnormalities

Babamiz bugunku Newsday'i oku, cok ilginc bir yazi var dedi, deterjanlarla ilgili, burada Jamaica Bay'de yapilan bir arastirmada, balik populasyonunda male, female % 50 iken, erkekler azalmis, bakmislar, genc male baliklarda gogus buyumesi olmus, deterjanlarda bulunan, chemicaller hormonal degisiklige neden oluyormus, yazinin tamamini asagiga ekliyorum.


Scientists are suggesting a common cause for two seemingly unrelated events, the feminization of fish in Jamaica Bay, where the former 50-50 male-to-female ratio has all but disappeared, and enlarged breasts in young boys.The common factor: endocrine disruptors, chemicals found in detergents, cosmetics and other products of daily living that increasing numbers of scientists now believe play havoc with normal hormone activity.
The chemicals' residues find their way into Jamaica Bay where the fish live and are contained in the hair gels and shampoos used by the three boys featured in a study this year. After the study, the National Institutes of Health took the extraordinary step of advising doctors to ask patients what kinds of personal-care products they use at home.In the case of Jamaica Bay, the specific endocrine disruptors implicated are NPEs -- chemicals found in waterways worldwide that are used in some laundry detergents and industrial cleaning agents."What we found is quite disturbing," said Anne McElroy, a marine scientist at Stony Brook University, referring to the gender change in Jamaica Bay's flounder. "I don't like to be an alarmist, but we have enough data from multiple years showing this effect and the fact that we've been able to recreate it in the lab makes the data pretty solid."Researchers who reported about the boys who used the hair gels and shampoos products -- made from lavender and tea-tree oil -- say the growth stopped after they stopped using the estrogenic cosmetics. With NPEs, scientists are still trying to decipher the extent of the problem.The work at Jamaica Bay has drawn attention in part because it echoes findings in a landmark study published five years ago by the U.S. Geological Survey. It found remnants of painkillers, insect repellents, perfumes, contraceptives and caffeine all afloat in major waterways. At least one Long Island water official says there have been no signs of NPEs in the region's drinking water. But as scientists sort out what it all means, the gender changes in marine life, and the concern about human harm, already has prompted the European Union to ban NPEs.The local appeal of the Jamaica Bay studies also stems from research conducted on Cape Cod. There, scientists found that the chemicals were not broken down by septic systems before they were released into the ground. Like Cape Cod, Long Island relies heavily on septic systems to handle household waste.The laundry detergent additive belongs to a family of "surfactants," chemicals that lift dirt and help detergents and cleaning agents do a better job of stain removal. NPEs flow into Jamaica Bay from treated sewage that spread over surface waters, experts say.Makers of domestic and industrial cleaners say NPEs are virtually unbeatable in the way they remove dirt.Manufacturer says its safeAt Huntsman Corp., a chemical giant in Salt Lake City, executives say the compound is safe and poses no harm to humans. The company is one of three major manufacturers of NPEs worldwide. Other key producers include Dow Chemical and Rhodia, a French company with U.S. offices in New Jersey."We manufacture the product and we will continue to manufacture the product," said Huntsman senior vice president Russ Stolle. "We do not see it declining in terms of our interest. We believe it to be safe. We've not seen anything that we believe is valid and definitive that would suggest otherwise."Huntsman produces about 90 million pounds of NPEs annually, Stolle said. The company markets to manufacturers of industrial cleaners -- those used by janitorial services.James Kapin, a member of the American Chemical Society's executive committee on health and safety was circumspect when asked whether NPEs are safe. "That's a very complicated question. There's no simple or absolute answer. The dose makes the poison," he said, citing sex changes in frogs, another species affected by the presence of the compounds worldwide.But support for NPE-containing products is eroding. Wal-Mart Corp., for example, is discouraging the use of NPEs in cleaning agents it sells and has asked suppliers to find alternatives. Many major detergent manufacturers no longer use them.Stony Brook's McElroy said eating fish from waters tainted with NPEs probably would not pose harm. NPEs do not concentrate in the parts of the fish that make up a fillet, and researchers have shown the chemicals do not pose harm in laundry washed with detergents containing NPEs.But health activists are not satisfied. Jeanne Rizzo, a registered nurse and executive director of the Breast Cancer Fund, an advocacy group that supports research on environmental links to the disease, wants federal regulators to identify and ban questionable ingredients in household cleaning agents, cosmetics and personal care products.Her organization is concerned about a range of products -- from plasticizers used in baby bottles, teethers and toys for infants to preservatives added to shampoos, soaps and hand lotions. She said the average American is exposed to at least six endocrine disruptors before leaving home daily for work or school.In humans, researchers have only tentative links, but they suggest endocrine disruptors may be associated with an elevated risk of testicular, breast and ovarian cancers. They also suggest exposure may explain puberty occurring at younger ages in girls and the underdevelopment of genitals in some boys.

4 comments:

Anne ve Bebisi said...

Bu tür haberleri duyup okuduğum zaman aklıma hemen şu ünlü kızılderili şefin söyledikleri geliyor. Son ağaç kesildiğinde, denizlerdeki son balıklar da öldüğünde.. diye devam eden şiir-söylev.. Paranın bir işe yaramayacağını anlatan güzel sözler. Güzel ama acı sözler:(
Allah sonumuzu hayr etsin ne diyelim.

New York'tan said...

Haklisin, bunlari okuyunca paranoyak oluyor insan,her sey zararli,her sey kansere yol aciyor,dedigin gibi,Allah sonumuzu hayr etsin.

ASYA said...

Deterjanlar ve diğer kimsayal bütün ürünler gerçekten suya toprağa doğaya ve ordanda bize çok zarar veriyo..Ama kullanmadan da yapamıyoruz..Herşeyi arıtsak arıtsak nereye kadar..Zaten doğal kaynakların kaç yılda bile bitebileceği artık hesaplanabiliyoken pek uzun zaman kalmadı heralde dünyanın önünde..Hep isterim şöyle yaylada Heidi gibi yaşamak...Bitek internetim olsun :) Yeterli..

New York'tan said...

:) iyi fikir Heidi gibi yasamak :) Ben deterjan kullanmiyorum, sabun kulaniyorum hep, gittgi yere kadar insallah :)