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In Real Time, Yale Scientists Watch Stem Cells at Work Regenerating Tissue

By Guest PostJuly 4, 2012Sciencealexander brown coxe, ann m haberman, cancer, connective tissue, david g gonzalez, disease, elizabeth deschene, embryonic development, giovanni zito, hair follicle, ichiko saotome, imaging technique, mammal, mesenchyme, panteleimon rompolas, photon intravital microscopy, postdoctoral fellowship, regenerate tissue, stem cell, Technology, therapeutic purpose, valentina greco

Scientists have for the first time watched and manipulated stem cells as they regenerate tissue in an uninjured mammal, Yale researchers report July 1 online in the journal Nature.

Using a sophisticated imaging technique, the researchers also demonstrated that mice lacking a certain type of cell do not regrow hair. The same technique could shed light on how stem cells interact with other cells and trigger repairs in a variety of other organs, including lung and heart tissue.

“This tells us a lot about how the tissue regeneration process works,” said Valentina Greco, assistant professor of genetics and of dermatology at the Yale Stem Cell Center, researcher for the Yale Cancer Center and senior author of the study. (more…)

New App Keeps Londoners in the Loop about the Tube

By Guest PostJuly 4, 2012Technologyandroid phone, licia capra, londoner, loop, neal lathia, new app, public transport, tfl, transport for london, tube, tube line, tube star, ucl, underground

A new app for android phones allows Londoners to share their experiences about the London Underground as they travel, and could transform how we use public transport.

The new application, called Tube Star, has been developed by researchers at UCL and aims to capture the experience of being in the tube, as reported by passengers. The app’s designers hope that it will give travellers a way of sharing their knowledge as well as improving our understanding of what happens when things go wrong – or right – on the underground. (more…)

Mass Extinctions Reset the Long-Term Pace of Evolution

By Guest PostJuly 3, 2012Scienceandrew z krug, animal kingdom, birth rate, bivalve, chicago esque, david jablonski, evolution, evolutionary rate, fossil, fossil mollusk, jurassic period, maryland outcrop, mass extinction, oysters, pace of evolution, paleontologist, pleistocene epoch, richard bambach, scallops, species diversification, time boundaries, university of chicago

A new study indicates that mass extinctions affect the pace of evolution, not just in the immediate aftermath of catastrophe, but for millions of years to follow. The study’s authors, University of Chicago’s Andrew Z. Krug and David Jablonski, will publish their findings in the August issue of the journal Geology.

Scientists expected to see an evolutionary explosion immediately following a mass extinction, but Krug and Jablonski’s findings go far beyond that.

“There’s some general sense that the event happens, there’s some aftermath and then things return to normal,” said Krug, a research scientist in geophysical sciences at UChicago. But in reality, Krug said, “Things don’t return to what they were before. They operate at a different pace, sometimes more rapidly, other times more slowly. Evolutionary rates shift, and that shift is permanent until the next mass extinction.” (more…)

Despite Hardships, Black Men in Urban Communities Are Resilient, MU Researcher Says

By Guest PostJuly 3, 2012Healthblack men, racial discrimination, resilience strategies, societal stressor, urban communities

Health programs should focus on men’s strengths to help them thrive amid societal stressors

COLUMBIA, Mo. –Black men, especially those living in low-income, urban areas, face many societal stressors, including racial discrimination, incarceration and poverty. In addition, these men have poorer health outcomes. Now, a University of Missouri faculty member has studied these men’s efforts to negotiate social environments that are not designed to help them attain good health and success. (more…)

Weevils and Weeds

By Guest PostJuly 3, 2012Environmentamanda stout, chester county, China, coverdale farm preserve, creek state park, dave pro, delaware, doug tallamy, judy hough goldstein, margo mcdonough, mile a minute, pea patch island, photosynthesize, rhinoncomimus latipes, shrubs, weed, weeds, weevil, weevils, white clay, yard

UD researchers use weevils to check spread of prolific mile-a-minute weed

Mile-a-minute weed has declared war on Doug Tallamy’s yard. This non-native, invasive vine is growing up his trees, scrambling over shrubs and smothering tree seedlings. By blocking sunlight, it weakens a plant by reducing its ability to photosynthesize.

Mile-a-minute doesn’t care one whit that Tallamy, professor and chair of the University of Delaware’s Department of Entomology and Wildlife Ecology, is a highly respected proponent of native gardening who doesn’t believe in planting any non-natives, let alone a highly invasive non-native.

“The deer brought mile-a-minute from our neighbor’s yard three years after we moved in,” says Tallamy. “We had just a few plants the first year, a few hundred the second year, and 20 trillion the third year.” (more…)

European Women Drive Majority of Engagement at Online Retail and Community Websites

By Guest PostJuly 2, 2012Technologycommunity website, Comscore, cosmetics, Europe, european women, fragrances, german, internet usage, odnoklassniki, online retail, otto gruppe, russia, russian internet audience, social networking site, tumblr, turkey

comScore Releases May 2012 Overview of European Internet Usage Showing Tumblr, Otto Gruppe and Groupon among Most Women-Oriented Web Properties

London, UK, 2 July 2012 – comScore, Inc., a leader in measuring the digital world, today released an overview of internet usage in Europe, showing that 395.7 million Europeans went online in May 2012 for an average of 27.6 hours each. The data for May, which includes internet usage in 49 European markets aggregated into the European region and individual reporting on 18 markets, also highlights the site categories and web properties with the highest concentration of usage among women in Europe. Tumblr.com had the highest concentration of usage among women, who accounted for 69 percent time spent on the popular social network. The report also showed that women generated the majority of time spent on multiple Retail subcategories, such as Fragrances/Cosmetics (71 percent share), Apparel (67 percent) and Department Stores (65 percent). (more…)

Programmable DNA Scissors Found for Bacterial Immune System

By Guest PostJuly 2, 2012Scienceartificial enzymes, bacterial immune system, bacterial protein, dna scissors, gene targeting, genome editing

Discovery Could Lead to Editing Tool for Genomes

Genetic engineers and genomics researchers should welcome the news from the Lawrence Berkeley National Laboratory (Berkeley Lab) where an international team of scientists has discovered a new and possibly more effective means of editing genomes. This discovery holds potentially big implications for advanced biofuels and therapeutic drugs, as genetically modified microorganisms, such as bacteria and fungi, are expected to play a key role in the green chemistry production of these and other valuable chemical products. (more…)

Despite Efforts for Change, Bangladeshi Women Prefer to Use Pollution-Causing Cookstoves

By Guest PostJuly 2, 2012Environment, Generalanimal dung, bangladeshi district, bangladeshi household, bangladeshi women, biomass, black carbon, cooking, cookstove, environmental impact, flooding, greenhouse gas, hatiya, health risk, jamlpur, mushfiq mobarak, pollution causing, puneet dwivedi, robert bailis, rural bangladesh, traditional stove, women, yale study, yale university

Women in rural Bangladesh prefer inexpensive, traditional stoves for cooking over modern ones — despite significant health risks, according to a Yale study in the Proceedings of the National Academy of Sciences.

A large majority of respondents (94%) believed that indoor smoke from the traditional stoves is harmful. Still, Bangladeshi women opted for traditional cookstove technology so they could afford basic needs.

“Non-traditional cookstoves might be more successful if they were designed with features valued more highly by users, such as reducing operating costs even if they might not reduce environmental impact,” said Mushfiq Mobarak, a co-author and associate professor of economics at the Yale School of Management. (more…)

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