Wednesday, August 31, 2005
Tuesday, August 30, 2005
PCBs as Environmental Estrogens: Turtle Sex Determination as a Biomarker of Environmental Contamination: "PCBs as Environmental Estrogens: Turtle Sex Determination as a Biomarker of Environmental Contamination
Judith M. Bergeron,1 David Crews,1 and John A. McLachlan2
1Department of Zoology, Institute of Reproductive Biology, University of Texas at Austin, Austin, TX 78712 USA
2National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709 USA
Introduction
Materials and Methods
Results and Discussion
Abstract
Polychlorinated biphenyls (PCBs) are widespread, low-level environmental pollutants associated with adverse health effects such as immune suppression and teratogenicity. There is increasing evidence that some PCB compounds are capable of disrupting reproductive and endocrine function in fish, birds, and mammals, including humans, particularly during development. Research on the mechanism through which these compounds act to alter reproductive function indicates estrogenic activity, whereby the compounds may be altering sexual differentiation. Here we demonstrate the estrogenic effect of some PCBs by reversing gonadal sex in a reptile species that exhibits temperature-dependent sex determination. Key words: biomarker, environmental estrogens, gonadal sex, PCBs, sexual differentiation, temperature-dependent sex determination. Environ Health Perspect 102:780-781 (1994)
http://ehpnet1.niehs.nih.gov/docs/1994/102-9/bergeron.html
Environmental Health Perspectives, Volume 102, Number 9, September 1994
PCBs as Environmental Estrogens: Turtle Sex Determination as a Biomarker of Environmental Contamination
Judith M. Bergeron,1 David Crews,1 and John A. McLachlan2
1Department of Zoology, Institut"
Judith M. Bergeron,1 David Crews,1 and John A. McLachlan2
1Department of Zoology, Institute of Reproductive Biology, University of Texas at Austin, Austin, TX 78712 USA
2National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709 USA
Introduction
Materials and Methods
Results and Discussion
Abstract
Polychlorinated biphenyls (PCBs) are widespread, low-level environmental pollutants associated with adverse health effects such as immune suppression and teratogenicity. There is increasing evidence that some PCB compounds are capable of disrupting reproductive and endocrine function in fish, birds, and mammals, including humans, particularly during development. Research on the mechanism through which these compounds act to alter reproductive function indicates estrogenic activity, whereby the compounds may be altering sexual differentiation. Here we demonstrate the estrogenic effect of some PCBs by reversing gonadal sex in a reptile species that exhibits temperature-dependent sex determination. Key words: biomarker, environmental estrogens, gonadal sex, PCBs, sexual differentiation, temperature-dependent sex determination. Environ Health Perspect 102:780-781 (1994)
http://ehpnet1.niehs.nih.gov/docs/1994/102-9/bergeron.html
Environmental Health Perspectives, Volume 102, Number 9, September 1994
PCBs as Environmental Estrogens: Turtle Sex Determination as a Biomarker of Environmental Contamination
Judith M. Bergeron,1 David Crews,1 and John A. McLachlan2
1Department of Zoology, Institut"
Saturday, August 27, 2005
Boston Vegetarian Society Calendar: "Monday, September 5, 2005 �Labor Day Special Event
We are so pleased to be invited by the Peace Abbey and Mass. Action for Animals (MAfA) to co-sponsor a special event featuring ex-cattle rancher Howard Lyman!
LABOR DAY MONDAY
SEPTEMBER 5, 2005 (Rain or shine)
1 PM - Vegan Potluck (see details below)
3 PM - Speaker Presentation
It is a treat to have a second occasion this summer to spend time in the special environment of the Peace Abbey in Sherborn, MA, and with Howard Lyman, wow!
Howard Lyman is a fourth generation Montana cattle rancher and feedlot operator who, because of a life-changing experience, became vegan and an advocate for farm animals, healthy living, and sustainable agriculture.
He is the author of 'Mad Cowboy The Cattle Rancher Who Won't Eat Meat', and is the subject of the recently released documentary, 'Mad Cowboy'.
Speaking with the credibility of an industry insider, Howard has been a leading voice for reform of the toxic chemical practices of modern agriculture, as well as for kindness to animals and to ourselves through meat-free living. Following an appearance on Oprah, he was co-defendant with Oprah Winfrey in the now infamous 'meat defamation' trial.
The Peace Abbey
Two North Main Street
Sherborn, MA (next to Natick)
Where Route 27 and Route 16 overlap
(Directions and free parking info will follow later.)
If you are new to the Peace Abbey, it is a unique and wonderful place, and houses a small sanctuary for rescued farm animals, whom you can visit. You can stroll the beautiful grounds and view the moving Pacifist Memorial and Gandhi statue, and the exquisite, lifesife bronze statue of Emily the Cow, which is the centerpiece of the recently de"
We are so pleased to be invited by the Peace Abbey and Mass. Action for Animals (MAfA) to co-sponsor a special event featuring ex-cattle rancher Howard Lyman!
LABOR DAY MONDAY
SEPTEMBER 5, 2005 (Rain or shine)
1 PM - Vegan Potluck (see details below)
3 PM - Speaker Presentation
It is a treat to have a second occasion this summer to spend time in the special environment of the Peace Abbey in Sherborn, MA, and with Howard Lyman, wow!
Howard Lyman is a fourth generation Montana cattle rancher and feedlot operator who, because of a life-changing experience, became vegan and an advocate for farm animals, healthy living, and sustainable agriculture.
He is the author of 'Mad Cowboy The Cattle Rancher Who Won't Eat Meat', and is the subject of the recently released documentary, 'Mad Cowboy'.
Speaking with the credibility of an industry insider, Howard has been a leading voice for reform of the toxic chemical practices of modern agriculture, as well as for kindness to animals and to ourselves through meat-free living. Following an appearance on Oprah, he was co-defendant with Oprah Winfrey in the now infamous 'meat defamation' trial.
The Peace Abbey
Two North Main Street
Sherborn, MA (next to Natick)
Where Route 27 and Route 16 overlap
(Directions and free parking info will follow later.)
If you are new to the Peace Abbey, it is a unique and wonderful place, and houses a small sanctuary for rescued farm animals, whom you can visit. You can stroll the beautiful grounds and view the moving Pacifist Memorial and Gandhi statue, and the exquisite, lifesife bronze statue of Emily the Cow, which is the centerpiece of the recently de"
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