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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…)

U.S. ranks near bottom among industrialized nations in efficiency of health care spending

By Guest PostDecember 26, 2013Healtharijit nandi, douglas barthold, first look, german, health care spending, health care system, industrialized nations, jody heymann, life expectancy, mcgill university, united states, us ranks

UCLA, McGill study also shows women fare worse than men in most countries

A new study by researchers at the UCLA Fielding School of Public Health and McGill University in Montreal reveals that the United States health care system ranks 22nd out of 27 high-income nations when analyzed for its efficiency of turning dollars spent into extending lives.

The study, which appears online Dec. 12 in the “First Look” section of the American Journal of Public Health, illuminates stark differences in countries’ efficiency of spending on health care, and the U.S.’s inferior ranking reflects a high price paid and a low return on investment. (more…)

Morphing manganese

By Guest PostAugust 31, 2013Environmentair, al mucci, aquatic environments, biogeochemistry, black sea, canada, electron, essential nutrient, george luther, golder associates, gulf, manganese, manganese oxide reduction, mcgill university, molecular oxygen, morphing manganese, new jersey, nitrate, ocean environments, ocean sediments, oxidation state, oxygen, photosynthesis, saint laurentian estuary, saint lawrence, sedimentary redox cycle, transition zone, university of delaware

UD researchers report new discovery in ‘Science’ about manganese in aquatic environments

An often-overlooked form of manganese, an element critical to many life processes, is far more prevalent in ocean environments than previously known, according to a study led by University of Delaware researchers that was published this week in Science.

The discovery alters understanding of the chemistry that moves manganese and other elements, like oxygen and carbon, through the natural world. Manganese is an essential nutrient for most organisms and helps plants produce oxygen during photosynthesis. (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…)

What Bacteria Don’t Know Can Hurt Them

By Guest PostJanuary 20, 2012Scienceactual infections, amruta joshi datar, antibiotic, antibiotic resistance, antibiotic sensitive bacteria, antibiotic targets, bacteria, bacteria in biofilms, bacterial functions, biofilm, cells, chronic wounds, cystic fibrosis, dao nguyen, elizabeth bauerle, infection, karlyn beer, lungs, mcgill university, metabolism, microbiologist, natural environment, nutrient, oxygen, paradox, pradeep singh, radicals, resistance, richard siehnel, starvation, starved bacteria, toxic forms, toxic radicals

Many infections, even those caused by antibiotic-sensitive bacteria, resist treatment. This paradox has vexed physicians for decades, and makes some infections impossible to cure.

A key cause of this resistance is that bacteria become starved for nutrients during infection. Starved bacteria resist killing by nearly every type of antibiotic, even ones they have never been exposed to before. (more…)

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