martes, 5 de noviembre de 2013

Is Global Heating Hiding out in the Oceans? Parts of Pacific Warming 15 Times Faster Than in Past 10,000 Years

Oct. 31, 2013 — A recent slowdown in global warming has led some skeptics to renew their claims that industrial carbon emissions are not causing a century-long rise in Earth's surface temperatures. But rather than letting humans off the hook, a new study in the leading journal Science adds support to the idea that the oceans are taking up some of the excess heat, at least for the moment. In a reconstruction of Pacific Ocean temperatures in the last 10,000 years, researchers have found that its middle depths have warmed 15 times faster in the last 60 years than they did during apparent natural warming cycles in the previous 10,000.

lunes, 20 de febrero de 2012

The Electric Microbe

Revista Time (The Best Inventions)
Bacteria have always gotten a bad rap. But we should be thankful for one especially talented microbe, Geobacter, which has tiny hairlike extensions called pili that it uses to generate electricity from mud and wastewater. Professor Derek Lovley and his team of researchers at the University of Massachusetts at Amherst have engineered a strain of Geobacter that's eight times as efficient as other strains at producing power. The next step: creating Geobacter-based fuel cells that can generate cheap, clean electricity.

http://www.time.com/time/specials/packages/article/0,28804,1934027_1934003_1933965,00.html

NATURE REVIEWS - MICROBIOLOGY

In situ to in silico and back: elucidating  the physiology and ecology of Geobacter spp. using genome-scale modelling.

Radhakrishnan Mahadevan, Bernhard Ø. Palsson and Derek R. Lovley

There is a wide diversity of unexploredmetabolismencoded in the genomes of  microorganisms that have an important environmentalrole.Genome-scalemetabolic  modelling enablesthe individualreactionsthat are encoded in annotated genomesto be organized into a coherent whole, which can then be used to predictmetabolic fluxesthat will  optimize cell function under a range of conditions. In this Review, we summarize a series of studiesin which genome-scalemetabolicmodelling ofGeobacterspp. hasresulted in an in-depth understanding oftheir centralmetabolismand ecology.Asimilariterative modelling and experimental approach could accelerate elucidation ofthe physiology and ecology of othermicroorganismsinhabiting a diversity of environments, and could guide optimization ofthe practical applications ofthese species.
Acceso a review: http://www.geobacter.org/publication-files/Nature%20Reviews%20Microbiology%202011.pdf

Metal-like microbial nanowires

Physicstoday (August 22, 2011). Protein filaments made by some bacteria may bridge the gap between solid-state electronics and biological systems.

Using Microbes to Generate Electricity

ScienceDaily (May 23, 2011) — Using bacteria to generate energy is a significant step closer following a breakthrough discovery by scientists at the University of East Anglia (UEA).
http://www.sciencedaily.com/releases/2011/05/110523152337.htm

lunes, 19 de septiembre de 2011

Fossilized Feathers

Not long ago, extinct dinosaurs were considered by most as scaly and dull. All the known fossils of primitive birds (stem avians) could easily fit on a desk and our only look at Mesozoic [250 to 65 million years ago (Ma)] feathers (except for a few isolated plumes) was Archaeopteryx, a theropod dinosaur considered by most to be the most primitive bird.


Descargar artículo completo http://ifile.it/ei8umhs

Selection for positive illusions

Everybody knows that overconfidence can be foolhardy. But a study reveals that having an overly positive self-image might  confer an evolutionary advantage if the rewards outweigh the risks


descargar artículo http://ifile.it/c9bf7iw

sábado, 20 de agosto de 2011

Growth of Cities Endangers Global Environment, According to New Analysis


ScienceDaily (Aug. 19, 2011) — The explosive growth of cities worldwide over the next two decades poses significant risks to people and the global environment, according to a meta-analysis published August 19 in PLoS ONE.

Researchers from Yale, Arizona State, Texas A&M and Stanford predict that by 2030 urban areas will expand by 590,000 square miles -- nearly the size of Mongolia -- to accommodate the needs of 1.47 billion more people living in urban areas.

Urban areas, they found, have been expanding more rapidly along coasts. "Of all the places for cities to grow, coasts are the most vulnerable. People and infrastructure are at risk to flooding, tsunamis, hurricanes and other environmental disasters," said Seto.
"It is likely that these cities are going to be developed in places that are the most biologically diverse," said Karen Seto, the study's lead author and associate professor in the urban environment at the Yale School of Forestry & Environmental Studies. "They're going to be growing and expanding into forests, biological hotspots, savannas, coastlines -- sensitive and vulnerable places."
The study provides the first estimate of how fast urban areas globally are growing and how fast they may grow in the future. "We know a lot about global patterns of urban population growth, but we know significantly less about how urban areas are changing," she said. "Changes in land cover associated with urbanization drive many environmental changes, from habitat loss and agricultural land conversion to changes in local and regional climate."
The researchers examined peer-reviewed studies that used satellite data to map urban growth and found that from 1970 to 2000 the world's urban footprint had grown by at least 22,400 square miles -- half the size of Ohio.
"This number is enormous, but, in actuality, urban land expansion has been far greater than what our analysis shows because we only looked at published studies that used satellite data," said Seto. "We found that 48 of the most populated urban areas have been studied using satellite data, with findings in peer-reviewed journals. This means that we're not tracking the physical expansion of more than half of the world's largest cities."
Half of urban land expansion in China is driven by a rising middle class, whereas the size of cities in India and Africa is driven primarily by population growth. "Rising incomes translate into rising demand for bigger homes and more land for urban development, which has big implications for biodiversity conservation, loss of carbon sinks and energy use.

miércoles, 23 de marzo de 2011

McLaren F1 MP4-23

McLaren MP4-23
McLaren Mercedes Vodafone, este es el auto con el que McLaren en el 2008 con Lewis Hamilton ganó el Campeonato Mundial de pilotos de Fórmula Uno. A mi juicio el auto más bonito y vistoso que a corrido en cualquier campeonato del mundo de cualquier categoría.  

sábado, 19 de marzo de 2011

Geobacter project

Pagina web dedicada al Geobacter sp., enfocándose a la capacidad que tienen estos microorganismos para transferir electrones a un electrodo de forma directa en una celda de combustible microbiana. La pagina ofrece una gran cantidad de full papers que este grupo de investigación (Geobacter project) a realizado.
http://www.geobacter.org/

Congreso AMIDIQ 2011

El comité técnico de la AMIDIQ ha extendido la fecha para el envío de los trabajos en extenso hasta el 2 de Abril 2011.


Congreso AMIDIQ 2011, 3 al 6 de mayo, 2011 Riviera Maya, Quintana Roo

martes, 15 de marzo de 2011

Noticia de interés para aquellos que se desarrollan en el área de bioenergía

AIE prevé mayor demanda de gas y energías renovables por Japón

Oslo.- El director de la Agencia Internacional de la Energía (AIE) dijo a Reuters que prevé una mayor demanda de energías renovables y gas tras el devastador terremoto y tsunami que azotaron Japón elviernes, mientras la energía nuclear se vuelve una opción menos popular.
Al ser consultado sobre si la demanda de energía renovable aumentaría a causa del desastre en Japón, Tanaka dijo en una entrevista que "eso podemos decir, debido al impacto de la (situación) nuclear (...) y también en la demanda de gas".
El jefe de la AIE precisó además que anticipa que la expansión de la energía nuclear será más costosa y experimentará mayores retrasos de lo pensado.
"Pero la energía nuclear en definitiva volverá porque es una tecnología necesaria para lograr la sostenibilidad en el futuro", aseguró, tras la presentación de un reporte sobre política energética en Noruega.


UEFA Champions League (Juegos para el 15 y 16 de Marzo 2011)

Juegos de la UEFA Champions League para esta semana (15 y 16 de Marzo 2011)

martes, 15 de marzo de 2011
Hora                 Local              Visitante              Etapa               Estadio
13:45  Bayern Munich        vs  Inter Milan    Octavos de final     Allianz Arena
13:45  Manchester United vs  Marseille       Octavos de final     Old Trafford

miércoles, 16 de marzo de 2011
Hora                Local                 Visitante                 Etapa               Estadio
13:45    Chelsea           vs  FC Copenhage   Octavos de final    Stamford Bridge
13:45    Real Madrid    vs  Lyon                   Octavos de final    Santiago Bernabéu

Nota:
Bayern Munich lleva ventaja de 1-0 sobre Inter Milan
Manchester United y Marseille  empate a 0
Real Madrid y Lyon  empate 1-1
Chelsea y FC Copenhagen, ventaja del Chelsea 2-0

Pronóstico
Avanzan: Chelsea, Real Madrid, Bayern Munich y Manchester United

Les dejo la encuesta de ESPN en la cual preguntan si algún equipo podrá vencer al Barcelona en la Champions






lunes, 14 de marzo de 2011

American Society of Microbiology

La American Society of Microbiology a através de ASM Journals permite tener acceso a los artículos completos de diversas revistas internacionales: Applied and Environmental Microbiology, Antimicrobial Agent and Chemotherapy, Clinical and Vaccine Immunology, Clinical Microbiology Reviews, Eucaryotic Cell, Infection and Immunity, Journal of Bacteriology, Journal of Clinical Microbiology, Journal of Virology, Microbiology and Molecular Reviews, Molecular and Cellular Biology, Minireview Collection of all Journals. 
http://www.journals.asm.org/

Highwire Press full articles gratis

En esta pagina podrás encontrar artículos completos de Revistas Internacionales Arbitradas e Indizadas de reciente publicación. Highwire Press es parte de recursos bibliográficos de la Universidad de Stanford.
http://highwire.stanford.edu/cgi/search?quick=true

Saludos seguidores del blog

Gracias a todos los que han decidido seguir al blog de Antonio Rodríguez.

Recomendaciones para Fernando Salinas de León de parte de Biotecnología

Saludos mi estimado Fher, por medio de la presente te hacemos la siguiente recomendación. No le vayas más a equipos perdedores como el Real Madrid, Los Vaqueros, America, etc., etc. Existen equipos muy buenos como el FC Barcelona, Los New England Patriots, El Monterrey.  

domingo, 13 de marzo de 2011

Entradas para la final de la UEFA Champions League a la venta

Ya están a la venta las entradas para la final de la UEFA Champions League 2011 que se disputará el sábado 28 de mayo en el estadio de Wembley (hora de inicio las 20:45 HEC). Los aficionados de todo el mundo tienen la oportunidad de conseguir entradas para el partido más importante de clubes.


Los aficionados del Barça, ya compren su entrada si no se van a quedar sin boletos.