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Dead Star and Distant Black Holes Dazzle in X-Rays

By Guest PostJanuary 11, 2014Scienceb1509, canada, cosmic evolution survey, cosmos field, dead star, distant black holes, fiona harrison, francesca civano, hand of god, hongjun an, mcgill university, montreal, NASA, new haven, nuclear, nustar, particle, psr b1509 58, pulsar, pulsar wind nebula, spectroscopic telescope array, spinning star, xrays, yale university

Two new views from NASA’s Nuclear Spectroscopic Telescope Array, or NuSTAR, showcase the telescope’s talent for spying objects near and far. One image shows the energized remains of a dead star, a structure nicknamed the “Hand of God” after its resemblance to a hand. Another image shows distant black holes buried in blankets of dust.

“NuSTAR’s unique viewpoint, in seeing the highest-energy X-rays, is showing us well-studied objects and regions in a whole new light,” said Fiona Harrison, the mission’s principal investigator at the California Institute of Technology in Pasadena, Calif. (more…)

A constitutional right to health care

By Guest PostJuly 29, 2013Health, Politicsaccountability, adele cassolab, affordable care act, amy raub, canada, canada foundation, congress, constitutional right, global public health, global recognition, half empty, half full, health care, health protection, innovation, jody heymann, latvia, lipi mishrab, mcgill university, medical care, moral right, senegal, transparency, ucla, united nations, united states, uruguay, us supreme court

UCLA-led study shows that many countries have it, but not the U.S.

Uruguay has it. So does Latvia, and Senegal. In fact, more than half of the world’s countries have some degree of a guaranteed, specific right to public health and medical care for their citizens written into their national constitutions.

The United States is one of 86 countries whose constitutions do not guarantee their citizens any kind of health protection. That’s the finding of a new study from the UCLA Fielding School of Public Health that examined the level and scope of constitutional protection of specific rights to public health and medical care, as well as the broad right to health. (more…)

Second-generation Immigrants Outperform Mainstream Populations in the US, Canada, and Australia

By Guest PostOctober 6, 2012Culture, Economy, Education, Politicsafro caribbean, australia, canada, canadian integration, canadian perspective, census data, chinese, cross national, difference, employment success, heather zhang, higher education, higher generation, immigrant, immigrant success, jeffrey reitz, labour market, mainstream population, mcgill university, multiculturalism, naoko hawkins, offspring, professional occupation, reflective, research journal, second generation, social science, south asian, survey, toronto, united states, university, US, white

TORONTO, ON – A new study published by the Social Science Research journal reveals that second-generation Chinese and South Asian immigrants in the US, Canada, and Australia are more successful than the respective mainstream populations (third- and higher-generation whites).

Jeffrey G. Reitz and Naoko Hawkins from the University of Toronto and Heather Zhang from McGill University examined survey and census data from these countries to compare the achievements of immigrants and their offspring. (more…)

Biologists Turn Back the Clock to Understand Evolution of Sex Differences

By Guest PostMay 9, 2012Nature, Scienceabderrahman khila, antlers, battle, darwin, ehab abouheif, evolution, hooks, locke rowe, male guppies, mating, mcgill university, moose, peacocks, plumage, rheumatobates rileyi, rna interference, sex differences, sexes, traits in nature, tusks, university of toronto, walruses, water striders, wild colours

Battles of sexes shown to spur adaptive sex differences

Sex differences account for some of the most of the spectacular traits in nature: the wild colours of male guppies, the plumage of peacocks, tusks on walruses and antlers on moose. Sexual conflict – the battle between males and females over mating – is thought to be a particularly potent force in driving the evolution of traits that differ in males and females.

However, the genetic processes responsible for producing such traits are not well understood, nor how they evolved from their simpler less elaborate ancestral forms. We tend to assume that each tiny step in evolution is an advantage. But are they really? (more…)

Biologically Best

By Guest PostJanuary 28, 2012Educationalex walter, article, bacterial protein, baylor university, becky maki, biologist, blood, cairo, cincinnati, egypt, evolutionary biology, florida, foundations of biology, fungal lineage, gretchen floan, iraqi war veteran, jonathan christenson, lisa hirsch, mark decker, mcgill university, mysterious, natural selection, nature of life, oklahoma, practicing biologists, robin wright, student, toxic metal, university of minnesota

*The U’s active learning biology courses garner attention*

What if you could remove lead from a person’s blood with a bacterial protein that snags the toxic metal?

Or treat spinal cord injury by shutting off a gene that prevents nerve regrowth?

Ideas like these used to be the exclusive province of practicing biologists. But they are among 14 ideas conceived and presented recently by students in the University of Minnesota’s introductory biology course. (more…)

Solving The Mystery of An Old Drug That May Reduce Cancer Risk

By Guest PostJanuary 19, 2012Health, Scienceanti diabetic drug, anti diabetic function, antioxidant, breast, cancer, cancer risk, carcinogenesis, cellular mutation rate, colon, diabetics, dna damage, gerardo ferbeyre, mcgill university, metformin, michael pollak, mitochondria, nutrient, rates of cancer, reactive oxygen species, reduction in risk, ros, scotland, type ii diabetes, université de montréal, university of montreal

In 2005, news first broke that researchers in Scotland found unexpectedly low rates of cancer among diabetics taking metformin, a drug commonly prescribed to patients with Type II diabetes. Many follow-up studies reported similar findings, some suggesting as much as a 50-per-cent reduction in risk. How could this anti-diabetic drug reduce the risk of developing cancer and what were the mechanisms involved?

In a paper published today in the journal Cancer Prevention Research, researchers from McGill University and the University of Montreal reported an unexpected finding: they learned that exposure to metformin reduces the cellular mutation rate and the accumulation of DNA damage. It is well known that such mutations are directly involved in carcinogenesis, but lowering cancer risk by inhibiting the mutation rate has never been shown to be feasible. (more…)

Helping Your Fellow Rat: Rodents Show Empathy-Driven Behavior

By Guest PostDecember 9, 2011Scienceanimals, behavior, biological inheritance, chocolate, chocolate chips, emotional contagion, empathetic behavior, empathy driven helping behavior, empathy in rodents, evolutionary tree, homo sapiens, inbal ben ami bartal, jean decety, jeffrey mogil, laboratory rats, mcgill university, neuroscientists, peggy mason, phenomenon in humans, primates, pro social, rats, robert mitchum, rodents, special test, Technology, test arena, university of chicago, wild species

*Rats free trapped companions, even when given choice of chocolate instead*

The first evidence of empathy-driven helping behavior in rodents has been observed in laboratory rats that repeatedly free companions from a restraint, according to a new study by University of Chicago neuroscientists.

The observation, published today in Science, places the origin of pro-social helping behavior earlier in the evolutionary tree than previously thought. Though empathetic behavior has been observed anecdotally in non-human primates and other wild species, the concept had not previously been observed in rodents in a laboratory setting. (more…)

Quest for Designer Bacteria Uncovers a Spy

By Guest PostFebruary 15, 2011Sciencebacteria helper, biosensors, coerce bacteria, directed evolution, escherichia coli, james bardwell, mcgill university, molecular assistant, shu quan, spy

ANN ARBOR, Mich.—Scientists have discovered a molecular assistant called Spy that helps bacteria excel at producing proteins for medical and industrial purposes.

Bacteria are widely used to manufacture proteins used in medicine and industry, but the bugs often bungle the job. Many proteins fall apart and get cut up inside the bacteria before they can be harvested. Others collapse into useless tangles instead of folding properly, as they must in order to function normally. (more…)

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