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Tuesday, March 4, 2014

Study finds less cooperation among women than among men where hierarchy is involved

"In fact, within academic departments women of different social or professional "ranks" cooperate with each other less well than men do, according to Joyce Benenson, an Associate of Harvard's Human Evolutionary Biology Department and Professor of Psychology at Emmanuel College, Richard Wrangham, the Ruth Moore Professor of Biological Anthropology and Henry Markovits, from the University of Quebec at Montreal, the study's co-authors. With full professors of the same sex, they said, the study found men and women cooperated equally well. The study is described in a March 3 paper published in Current Biology."Gender stereotypes often characterize males as hyper-competitive, whereas women are thought to be more communal and willing to cooperate. But a new study suggests the opposite is true, at least when the competition is publishing and the setting is academia.
In analyzing publication records of 50 North American universities, researchers at Harvard University showed men were more likely to co-author a study with someone of the same sex but of lower or higher professional rank -- a professor teaming with an associate professor, for example -- than women were.
The study found that men and women were equally prone to cooperate with peers of the same professional ranking.
"In ordinary life we often think of women as being more cooperative and friendly with each other than men are," explained lead author Joyce Benenson. "But this is not true when hierarchy enters the picture."
The researchers chose academia for their study because equal numbers of men and women with easily quantifiable ranking and mutual investment were less apparent in government or business settings.
Even within academia, sufficient numbers of women researchers weren't found in areas of study such as biology, chemistry and physics. Researchers settled on psychology departments as the most suitable for testing their hypotheses about gender differences and cooperation.
"People are often upset to hear evidence of sex differences in behavior," Benenson said. "But the more we know, the more easily we can promote a fair society."
Benenson says more research is needed to determine why women don't cooperate more in academia. It's possible that they attempt cooperation but fail for one reason or another, or that men somehow encourage the lack of female cooperation.
The findings of the study were published recently in the Cell Press journal Current Biology.


Read more: http://www.upi.com/Science_News/2014/03/03/Women-less-cooperative-than-men-in-academia-study-finds/2511393874867/#ixzz2uyqWx7NO

உலகில் ஒரே ஒரு நாடு மட்டுமே தமிழ் எண்களை நாணயத்தாள்களில் பயன்படுத்துகிறது

உலகில் ஒரே ஒரு நாடு மட்டுமே தமிழ் எண்களை நாணயத்தாள்களில் பயன்படுத்துகிறது.
ius ) மட்டுமே. (தமிழ் எண்கள் ௦ – 0, ௧- 1, ௨- 2,௩- 3, ௪- 4, ௫- 5, ௬- 6, ௭- 7, ௮- 8, ௯- 9) மொரீசியசு நாட்டின் ரூபாய் தாளில் தமிழில் எழுத்துக்களும், எண்களும் ( ரூ.10 தமிழில் ௧௦) இடம் பெற்றிருப்பதை இப் படத்தில் காணலாம் . எங்கோ தூரத்தில் ஆப்பிரிக்காவின் அருகில் உள்ள மொரிசியசு அரசு தமிழ் எண்களை பயன்படுத்துவது பெருமைக்குரியதே. 

மொரீசியசில் 30000 க்கும் மேற்பட்ட தமிழர்கள் வாழ்கின்றனர். 

இந்த செய்தியே தெரியாத நண்பர்களுக்கு பகிரவும்.
உலகில் ஒரே ஒரு நாடு மட்டுமே தமிழ் எண்களை நாணயத்தாள்களில் பயன்படுத்துகிறது.மொரீசியசு
 மட்டுமே. (தமிழ் எண்கள் ௦ – 0, ௧- 1, ௨- 2,௩- 3, ௪- 4, ௫- 5, ௬- 6, ௭- 7, ௮- 8, ௯- 9) மொரீசியசு நாட்டின் ரூபாய் தாளில் தமிழில் எழுத்துக்களும், எண்களும் ( ரூ.10 தமிழில் ௧௦) இடம் பெற்றிருப்பதை இப் படத்தில் காணலாம் . எங்கோ தூரத்தில் ஆப்பிரிக்காவின் அருகில் உள்ள மொரிசியசு அரசு தமிழ் எண்களை பயன்படுத்துவது பெருமைக்குரியதே.

மொரீசியசில் 30000 க்கும் மேற்பட்ட தமிழர்கள் வாழ்கின்றனர்.

இந்த செய்தியே தெரியாத நண்பர்களுக்கு பகிரவும்.

Bacteria may fight cancer

knorre_bacteria_shutterstock
Bacteria can excite an immune response against cancer.
Image: knorre/Shutterstock
 UNIVERSITY OF OTAGO    
Recent research from the University of Otago shows that bacteria may assist the body’s immune system response against cancer cells and help fight tumours like melanoma.
The research published in the official journal of the American Association of Immunologists, theJournal of Immunology, demonstrates that bacteria stimulate a type of immune response that results in more effective killer cell attacks against cancer.
Associate Professor Alex McLellan from the Department of Microbiology and Immunology says the new results are very encouraging and will prompt further investigation using human cells and cancer patients.
“By using bacteria we can excite an immune response against cancer and our results show that natural killer cells are very important in this enhanced response,” Dr McLellan explains.
“What we’ve discovered is that these natural killer cells are stimulated by bacteria to enhance the potency of the immune response to the tumour. Interestingly, natural killer cells don’t seem to make the vaccine any stronger, but rather enhance the visibility of the tumour to the immune response induced by vaccination.”
Associate Professor McLellan says that this pathway further enhances the body’s ability to attack cancer cells by boosting tumour-specific T cells. The natural killer cells seem to be releasing growth factors which make other immune cell types better able to destroy the cancer.
Vaccination predominantly stimulates an ‘adaptive’ immune response. Since natural killer cells were initially classed as members of the innate, or primitive, arm of the immune system, they were thought to play no part in protection afforded by vaccination. But this research shows important links between the innate and adaptive response of the body in anti-tumour immunity, says Dr McLellan.
An immunological approach to cancer harks back to over 120 years ago to Coley’s toxins, says Dr McLellan. American surgeon William Coley discovered in the 1890s that when a patient is inoculated or even infected with bacteria this can have a significant effect or even destroy the cancer. This approach was not seriously pursued after the development of chemotherapy and radiation.
Now this area of research is again being reactivated as another possible tool in the fight against cancer.
Associate Professor McLellan says the next step is to test these very positive findings using human cells, and then extend it to cancer patients through collaborators in Germany.
This research has been funded by University of Otago.
Editor's note: Original news release can be found here.