HOME >> BIOLOGY >> NEWS
Sunlight converts common anti-bacterial agent to dioxin

S. Geological Survey published a widely circulated study of chemicals in surface water, in which triclosan was found in 58 percent of natural waters tested. Its median concentration was 0.14 parts per billion; the maximum was 2.3 ppb. McNeill and Arnold chose to study triclosan because they could tell from its structure that it would likely break down in sunlight.

In their study, McNeill and Arnold added triclosan to river water, shined ultraviolet light on the water, and found that between one percent and 12 percent of the triclosan was converted to dioxin.

"The fact that this conversion can happen in surface layers of rivers may not cause harm by itself, but it suggests that more serious reactions--leading to more toxic forms of dioxin--may also happen when triclosan enters the environment," said Arnold. "We want to determine if this is the case." As a first step in sorting out the relations, if any, between triclosan and more toxic dioxin, McNeill and Arnold plan studies to determine whether they tend to occur together in natural waters.

The researchers said that even low levels of very toxic dioxin are worrisome because dioxin readily accumulates in organisms and becomes more concentrated in tissues as it moves up the food chain.

The study was funded by the U.S. Geological Survey, through the National Institutes of Water Resources. Triclosan is manufactured by Ciba-Geigy.


'"/>

Contact: Deane Morrison
morri029@umn.edu
612-624-2346
University of Minnesota
14-Apr-2003


Page: 1 2

Related biology news :

1. Sunlight, PCB exposure enhance skin cancer chances
2. How Nature Harvests Sunlight
3. Researchers discover new oceanic bacterial photopigment that converts light into biochemical energy
4. New process converts municipal waste into commodities and fuel
5. Most recent common ancestor of all living humans surprisingly recent
6. Hidden diversity: DNA barcoding reveals a common butterfly is actually 10 different species
7. European common frog found to use novel mating strategy
8. Genetic clues found for common congenital brain disorder
9. Stanford researchers findings may shed light on common, deadly birth defect
10. U-M scientists find common virus in human prostate tissue
11. Scientists suggest framework for epigenetics in common disease

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/13/2017)... April 13, 2017 According to a new market ... Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, Deployment Mode, Vertical, ... Market is expected to grow from USD 14.30 Billion in 2017 to ... of 17.3%. ... MarketsandMarkets Logo ...
(Date:4/11/2017)... Research and Markets has announced the addition of the ... ... grow at a CAGR of 30.37% during the period 2017-2021. ... prepared based on an in-depth market analysis with inputs from industry ... over the coming years. The report also includes a discussion of ...
(Date:4/11/2017)... April 11, 2017 NXT-ID, Inc. (NASDAQ: ... company, announces the appointment of independent Directors Mr. Robin ... its Board of Directors, furthering the company,s corporate governance and ... Gino Pereira ... look forward to their guidance and benefiting from their considerable ...
Breaking Biology News(10 mins):
(Date:6/20/2017)... ... June 20, 2017 , ... National executive ... leader with extensive assay development and biomarker expertise, as VP of Scientific Affairs ... CRO specializing in bio-analytical assay development and sample testing services. The organization acts ...
(Date:6/20/2017)... , ... June 20, 2017 , ... ... discovery of antibody therapeutics from millions-diverse immune repertoires, announces launch of its new ... Diego, California. Dave Johnson, PhD, CEO of GigaGen, will present on Surge at ...
(Date:6/19/2017)... ... June 19, 2017 , ... ... development reported today that it is launching two new additions of its award-winning ... demonstrating new capabilities at the DIA 2017 Annual Meeting in Chicago, IL, June ...
(Date:6/19/2017)... ... 2017 , ... A colony of healthy honey bees is like a superorganism--individual ... and nectar containing nutrients necessary for growth and survival. Better nutrition gives the colony ... point to a decline in honey bee health. Sick and weakened bees diminish the ...
Breaking Biology Technology:
Cached News: