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A Tailored Pair of Genes

By Guest PostNovember 22, 2011Scienceagriculture, alfalfa like legume, ancestor of legumes, ancestral genes, ancient plants, asteroid, backbone of protein, bacteria, beans, cretaceous period, crop plants, demise of the dinosaurs, dinosaurs, disaster, earth, eggs, fertilizers, genes, genetically engineer legumes, genomes, humans, legumes, living together, major nutrient, medicago truncatula, model, nevin young, nitrogen, nitrogen and phosphorus fertilizer, nitrogen fixation, nitrogen fixing bacteria, nonsynthetic nitrogen fertilizer, peanuts, peas, sequencing genome, soybeans, sperm, synthetic fertilizer, university of minnesota

*For ancient plants, two genes were definitely better than one*

In the wake of the disaster that killed the dinosaurs, the ancestors of today’s crop plants reinvented themselves.

They doubled their genomes, and in that single act set the stage for feeding the world 60 million years later.

In a study published in the Nov. 16 issue of the journal Nature, researchers from the University of Minnesota and other institutions recount how sequencing the genome of a model, alfalfa-like legume revealed the monumental benefits that flowed when the ancestor of legumes acquired an extra copy of every gene. (more…)

Berkeley Lab to Build Cost Model for Fuel Cells

By Guest PostNovember 2, 2011Scienceadam weber, analytica, ballard power systems, benefits of fuel cells, berkeley lab, carbon cycle 2, chris marnay, coal, eric masanet, fossil fuels, fuel cell design, fuel cell manufacturer, fuel cells, geographic factors, human health benefits, ideal energy source, jim mcmahon, julie chao, kilowatts, lawrence berkeley national laboratory, max wei, model, power from hydroelectricity, powerful public tool, software platform, university of california, washington state, west virginia

*A $2-million award from DOE will help bring down the cost of next-generation fuel cells.*

Fuel cells seem like an ideal energy source—they’re clean, efficient, silent and don’t require transmission lines. The hitch? They can be costly. Now scientists at Lawrence Berkeley National Laboratory (Berkeley Lab) hope to change that equation by building a sophisticated cost model that will take into account the total cost of ownership.

With a $2-million grant from the U.S. Department of Energy, a team of scientists led by Eric Masanet will perform a detailed assessment of fuel cell design and manufacturing that takes into account both intrinsic and external benefits. The aim is to quantify not only traditional manufacturing costs but also benefits that may previously have been overlooked and may ultimately bring down the cost of fuel cells. (more…)

New Computer Programme Promises To Save The Whales

By Guest PostOctober 13, 2011Environment, Natureatlantic ocean, beluga, biological diversity, blue whale, clement chion, complex systems laboratory, computer programme, ecological and economic tradeoffs, environmental conditions, fin whale, humpback, lael parrott, les escoumins, marine mammal, minke whale, model, quebec, saguenay fjord, saint lawrence estuary, st lawrence estuary, tadoussac, university of montreal, whale watching

Researchers at the University of Montreal have developed a computer programme that enables regulators to evaluate the ecological and economic tradeoffs between marine mammal conservation, whale watching and marine transportation activities in the Saint Lawrence Estuary.

“The objective is to reduce the collision risk with whales while taking into account the impact on industry and marine transportation,” said Lael Parrott, who headed the research team. The model, developed in her Complex Systems Laboratory, maps the estuary where the field research was undertaken, simulates the comings and goings of five mammal species (minke whale, fin whale, beluga, humpback and blue whale), the presence and movements of three types of boats (recreation, excursion and cargo), and environmental conditions. Nine scenarios were elaborated in order to observe the effects of various decisions. (more…)

MU Study Identifies Protective Factors that Help Women Recover from Childhood Violence

By Guest PostJuly 13, 2011Healthabusive intimate relationships, children, domestic violence, economic stability, economic sustainability, kim anderson, mental health problems, model, police involvement, positive adult role models, post traumatic stress disorder, psychological problems, ptsd, risk factors for ptsd, school of social work, university of missouri, women

COLUMBIA, Mo. – Children who witness domestic violence are more likely to be in abusive intimate relationships and experience psychological problems such as post traumatic stress disorder (PTSD) in adulthood, according to the Centers for Disease Control and Prevention. A University of Missouri researcher has found that certain protective factors foster resilience and increase the likelihood that the cycle of violence will end for women who, as children, were exposed to their mothers’ battering.

Kim Anderson, associate professor in the MU School of Social Work, found that women are less likely to suffer from PTSD if they are more resilient, or better able to overcome adversity. In regard to childhood protective factors that increase adult resilience, Anderson found that mothers who were employed full-time had a positive influence on their children’s recovery from witnessing domestic violence. (more…)

On the Sizeable Wings of Albatrosses

By Guest PostMarch 25, 2011Nature, Scienceabove ocean wind shear, air sea friction, airborne sailboat, albatross, albatross flight, albatrosses, colin pennycuick, dynamic soaring, kinetic energy, large bird, lord rayleigh, model, nobel laureate, oceanographer, oceans, philip richardson, physicist, radio controlled gliders, scientist, south atlantic ocean, sustained soaring, wave trough, wings

An oceanographer may be offering the best explanation yet of one of the great mysteries of flight—how albatrosses fly such vast distances, even around the world, almost without flapping their wings. The answer, says Philip L. Richardson of the Woods Hole Oceanographic Institution (WHOI), lies in a concept called dynamic soaring, in which the large bird utilizes the power of above-ocean wind shear while tacking like an airborne sailboat.

“I have a simple model that explains the basic physics of what albatrosses do,” says Richardson, a scientist emeritus at WHOI, who, in addition to his primary career in studying ocean currents, has also piloted gliders. The key, he says, is the bird’s ability to balance the kinetic energy gained in soaring with the energy lost from drag. (more…)

Global Model Confirms: Cool Roofs Can Offset Carbon Dioxide Emissions and Mitigate Global Warming

By Guest PostJuly 20, 20101 commentEnvironment, Scienceberkeley lab, carbon dioxide, carbon emissions, climate change, cool roof, cool the world, curb, doe, emissions, evaporation, goddard space flight center, hashem akbari, keith oleson, light-colored rooftops, model, NASA, ncar, radiation, steven chu, surabi menon, Technology, temperature, topography, urban heat

Can light-colored rooftops and roads really curb carbon emissions and combat global climate change?

The idea has been around for years, but now, a new study by researchers at Lawrence Berkeley National Laboratory that is the first to use a global model to study the question has found that implementing cool roofs and cool pavements in cities around the world can not only help cities stay cooler, they can also cool the world, with the potential of canceling the heating effect of up to two years of worldwide carbon dioxide emissions.

(more…)

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