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Study Suggests That Being Too Clean Can Make People Sick

By Guest PostNovember 29, 2010Healthallergies, allison aiello, antibacterial soaps, antibody, antimicrobial agent, bisphenol a, bpa, cmv, cytomegalovirus, edcs, endocrine-disrupting compounds, environmental toxicants, erin rees clayton, hay fever, hormones, hygiene hypothesis, immune system, micro-organisms, plastics, toothpaste, triclosan, young people

ANN ARBOR, Mich.— Young people who are overexposed to antibacterial soaps containing triclosan may suffer more allergies, and exposure to higher levels of Bisphenol A among adults may negatively influence the immune system, a new University of Michigan School of Public Health study suggests.

Triclosan is a chemical compound widely used in products such as antibacterial soaps, toothpaste, pens, diaper bags and medical devices. Bisphenol A (BPA) is found in many plastics and, for example, as a protective lining in food cans. Both of these chemicals are in a class of environmental toxicants called endocrine-disrupting compounds (EDCs), which are believed to negatively impact human health by mimicking or affecting hormones. (more…)

Black Friday Boasts $648 Million in U.S. Online Holiday Spending, Up 9 Percent vs. Year Ago

By Guest PostNovember 29, 2010Culture, TechnologyAmazon, black friday, Comscore, digital world, e-commerce spending, gian fulgoni, groupon, november 26, online shopping season, shoplocal, thanksgiving day

*Thanksgiving Day Surges 28 Percent to $407 Million as Consumers Increasingly Use Day for Online Shopping*

RESTON, VA, November 28, 2010 – comScore, a leader in measuring the digital world, today reported U.S. retail e-commerce spending for the first 26 days of the November – December 2010 holiday season. For the holiday season-to-date, $11.64 billion has been spent online, marking a 13-percent increase versus the corresponding days last year. Black Friday (November 26) saw $648 million in online sales, making it the heaviest online spending day to date in 2010 and representing a 9-percent increase versus Black Friday 2009. Thanksgiving Day (November 26), traditionally a lighter day for online holiday spending, achieved a strong 28-percent increase to $407 million. (more…)

Will This Be The End of Hamburger Disease?

By Guest PostNovember 28, 2010Healthbowel function, food poisoning, hamburger disease, invasive bug, kidney failure

E. coli bacteria. Image credit: University of Montreal

Hamburger disease, a debilitating form of food poisoning, may be a thing of the past. New findings from an international research collaboration conducted by the French National Institute for Agronomic Research (INRA), involving the Université de Montréal are the first to show how the contaminating E.coli bacterium is able to survive in the competitive environment of a cow’s intestine by scavenging specific food sources. Published in this month’s Environmental Microbiology, and featured in Nature Reviews Microbiology, this study may lead to non-medicinal methods for eradicating this invasive bug. (more…)

Mammals Grew 1,000 Times Larger After the Demise of the Dinosaurs

By Guest PostNovember 27, 2010Sciencebody size, evolution, existence of dinosaurs, extinction of dinosaurs, land mammals

NSF enabled the assembly of an international, interdisciplinary team that was the first to quantitatively document body size patterns over the past 100 million years

Researchers have demonstrated that the extinction of dinosaurs some 65 million years ago paved the way for mammals to get bigger, about a thousand times larger than they had been when dinosaurs roamed the earth. The study, released in the journal Science, is the first to quantitatively document the patterns of body size of mammals after the existence of dinosaurs. (more…)

How Pathogens Hijack Host Plants

By Guest PostNovember 27, 20101 commentSciencearabidopsis, bacteria, cell membrane, cells, diabetes, fluorescence resonance energy transfer, frank white, fret, fungi, global crop, infestation, li-qing chen, mustard, mutation, novel transporters, organism, pathogen infection, pathogenic bacteria, pathogens, plant nutrients, pore proteins, protein genes, sensor-based technology, sugar efflux, sugar-pumping mechanism, sweets

Palo Alto, CA — Infestation by bacteria and other pathogens result in global crop losses of over $500 billion annually. A research team led by the Carnegie Institution’s Department of Plant Biology developed a novel trick for identifying how pathogens hijack plant nutrients to take over the organism. They discovered a novel family of pores that transport sugar out of the plant. Bacteria and fungi hijack the pores to access the plant sugar for food. The first goal of any pathogen is to access the host’s food supply to allow them to reproduce in large numbers. This is the first time scientists have a direct handle on controlling the food supply to pathogens and thus a new means to prevent a wide range of crop diseases and losses. (more…)

Earth’s Lakes Warming Due to Climate Change

By Guest PostNovember 26, 2010Environmentalgal blooms, alpine lake, black, caspian seas, climate change, emerald bay, global survey, great lakes, kazakhstan, lake tahoe, lakes, lakes warming, natural ecosystem, North America, northern europe, northern hemisphere, philipp schneider, satellite data, simon hook, surface temperatures, temperature, trends

Lake Tahoe, seen here from Emerald Bay, was one of the primary validation sites for the global lake study. The lake, which straddles the borders of California and Nevada, is the largest alpine lake in North America. Image credit: NASA-JPL

WASHINGTON – In the first comprehensive global survey of temperature trends in major lakes, researchers have determined that Earth’s largest lakes have warmed during the past 25 years in response to climate change.

Philipp Schneider and Simon Hook of NASA’s Jet Propulsion Laboratory in Pasadena, Calif., used satellite data to measure the surface temperatures of 167 large lakes worldwide.

They reported an average warming rate of 0.45 degrees Celsius (0.81 degrees Fahrenheit) per decade, with some lakes warming as much as 1 degree Celsius (1.8 degrees Fahrenheit) per decade. The warming trend was global, and the greatest increases were in the mid- to high-latitudes of the Northern Hemisphere. (more…)

Why Do People Behave Badly? Maybe It’s Just Too Easy

By Guest PostNovember 26, 2010Culture, Generalbadly, behave, job application, michael inzlicht, people, psychology, rimma teper, scarborough

Many people say they wouldn’t cheat on a test, lie on a job application or refuse to help a person in need.

But what if the test answers fell into your lap and cheating didn’t require any work on your part? If you didn’t have to face the person who needed your help and refuse them? Would that change your behaviour? (more…)

UNESCO World Heritage Sites Threatened by Tourism

By Guest PostNovember 25, 2010Culturemount danxia, old quebec, principles of conservation, reddish sandstone, world heritage program, world heritage sites

Machu Picchu Temple of the Sun (also named “the watch tower”). The stones of its dry-stone walls built by the Incas can move slightly and resettle without the walls collapsing. Image credit: Fabricio Guzmán. Source: Wikipedia

The UNESCO World Heritage program aims to protect cultural and natural sites considered important to the common heritage of humanity. However, many of these sites are now threatened by excessive tourism, according to Christina Cameron, professor at the Université de Montréal School of Architecture and holder of the Canada Research Chair on Built Heritage.

A case in point is Machu Picchu in Peru. “This site should receive no more than 2,000 visitors per day, but it currently welcomes twice as many,” says Cameron, who sounded the alarm while speaking as a panelist at a celebration commemorating 25 years of Old Québec being such a site.

“The UNESCO World Heritage convention was established in a spirit of solidarity and international cooperation in order to share best practices for conservation,” says Cameron. “It was the post-war era and people were seeking for a way to bring together members of the international community. Tourism was never an objective of the convention. In fact, these sites were meant to be protected from it.” (more…)

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