Category Archives: Science

Bacterial Evolution in Yogurt

Adapting to Life in Yogurt by Carl Zimmer:

The analysis, based on the microbe’s newly sequenced genome, suggests that the bacteria descend from microbes that originally fed on plants. Some of them fell accidentally into some herder’s milk, it seems, and happened to clot it and kept it from spoiling. Since then, people have been transferring yogurt to fresh milk time and again, and the effect has been like running a long-term experiment on the evolution of bacteria.

Carl Zimmer provide much more detail in this podcast: evolution of bacteria in yogurt. Continue reading →

Science, Engineering and Technology Graduates Paid Well

Forfás report says starting salaries for science engineering and technology graduates are amongst the highest of all Irish graduates.

Speaking at the awards ceremony Minister Martin said, “This report highlights the exciting careers and levels of opportunity open to graduates and students in the science, engineering and technology sector. These graduates and students are at the forefront of Ireland’s transition as a world leading knowledge economy, working at the cutting edge of innovation and research.
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Across a range of qualifications from primary degree to PhD level the report shows that graduates in disciplines with a strong science and technology content tend to be better paid than graduates in other disciplines.

This is another example of countries targeting science and engineering education to improve future economic progress and the high pay of engineering graduates. Previous related posts:

Britain’s Royal Society Experiments with Open Access

Good news, the Royal Society tries open access by Stephen Pincock:

Britain’s Royal Society dipped a cautious toe into the waters of open access publishing this week, allowing authors whose papers are accepted by any of its seven journals to pay a fee and have their work made freely available on the web.

It seems to me most grants for scientific research should require open publication. I can imagine exceptions, but it seems to me that the expectation should be for open publication, in this day and age, and only allow non-open publication with a good reason.

For public funded research this open access expectation seems obvious. For private foundations in most cases I would think open access publication makes sense also. What business model is used to allow open access is not important, in my opinion. The important factor is open access, how that is accomplished is something that can be experimented with.
Continue reading →

Science, Education and Community

Science, Education and Community: Organically Grown

In 2001, Krasny received a grant from the National Science Foundation’s Informal Science Education program to create Garden Mosaics, a project that merges gardening with education in urban areas. Since then, the project has expanded into dozens of cities across the United States and abroad, and has received recognition from national educational groups and gardening associations.

Garden Mosaics web site, including a cartoon explanation of the scientific process. Continue reading →

The Art and Science of Imaging

Cancer Cell

The Art of Imaging from Invitrogen (via Molecular Probes’ protocols for pretty pictures). See interesting images and details on exactly how to scientists create such images.

image: -catenin in HeLa human cervical cancer cells was labeled using mouse anti–catenin and visualized with Alexa Fluor 488 goat anti-mouse IgG (green). Filamentous actin was visualized using red-fluorescent Alexa Fluor 635 phalloidin. Nuclear DNA was stained with blue-fluorescent DAPI. Larger photo and more details

The image gallery includes many more images.

Drilling to the Center of the Earth

The Deepest Hole by Alan Bellows:

In the 1960s the Soviet Union began a project to drill through the upper crust of the earth to reach the “mysterious area where the crust and mantle intermingle.” That project continued over 4 decades but they never were able to succeed. In order to drill at the depths they did reach they needed to engineer new drilling techniques.

Inside the project’s 200-foot-tall enclosure resides a unique drilling apparatus. Most deep-drilling rigs use a rotating shaft to bore through the ground– using a series of extensions which are incrementally added as the hole grows deeper– but such a method was unworkable with a hole as deep as Kola was planned to be. To overcome this, the Russian researchers devised a solution where only the drill bit at the end of the shaft was rotated. They accomplished this by forcing the pressurized “drilling mud”– the lubricant pumped down the drill shaft– through the specially-designed drill bit to cause it to spin.

Robot Football (Soccer)

In addition to the World Cup another international football event is taking place in Germany this month: RoboCup 2006

Researcher Founds a Robot Soccer Dynasty (including video webcast):

RoboCup is an international project to foster advances in artificial intelligence and intelligent robotics research. The ultimate goal of RoboCup is to develop, by 2050, a team of fully autonomous humanoid robots that can beat the human world champion soccer team. Veloso and Carnegie Mellon have been participating since “pre-RoboCup” events in 1996 and the first official RoboCup games in 1997. Veloso was general chair of RoboCup 2001 in Seattle.

Scientific Illiteracy

Scientific Illiteracy and the Partisan Takeover of Biology by Liza Gross, Public Library of Science:

Since 1979, the proportion of scientifically literate adults has doubled—to a paltry 17%. The rest are not savvy enough to understand the science section of The New York Times or other science media pitched at a similar level. As disgracefully low as the rate of adult scientific literacy in the United States may be, Miller found even lower rates in Canada, Europe, and Japan—a result he attributes primarily to lower university enrollments.

While the 17% figure does not amaze me I am surprised that the scientific literacy has doubled since 1979.

A comparison of science education achievement: International Association for the Evaluation of Educational Achievement (TIMSS), Average science scale scores of eighth-grade students, by country (2003), top 13 shown below:
Continue reading →

Two Butterfly Species Evolved Into Third

Butterfly photo

Two Butterfly Species Evolved Into Third, Study Finds by James Owen, National Geographic News:

Researchers say their creation reveals a process called hybrid speciation, in which the genes of two existing species combine to produce a third.

The study suggests hybridization may be more important to the evolution of new animals than had previously been thought.

Hybrids such as the mule, a cross between a donkey and a horse, are sterile. But the team says the butterfly hybrid brought together a combination of genes that allowed it to breed and there be considered a new species.

Biological Molecular Motors

bio

Image: The biomolecular portal motor of bacteriophage PHI-29 (yellow) compresses the coiled DNA into the viral capsid at 6,000 times its normal pressure. (courtesy the Bustamante group)

Start Your Protein Engines by David Pescovitz:

Oster and his research group investigate the physics and chemistry behind great engineering mysteries of the natural world, from protein motors to cell motility to how bacteria form thriving populations that aren’t so different from ant colonies, or even human societies.
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Working with UC Berkeley professor Carlos Bustamante, researchers have also studied the motor that packs a virus’s DNA so tightly that it can be injected into a hijacked cell at ten times the pressure of a cork shooting out of a champagne bottle. And they’ve modeled the donut-shaped molecular motors that move along DNA strands during replication.

In the closing paragraph Dr. Oster is quoted on the use of models, which reminds me a the quote from Dr. George Box: All models are wrong, some are useful.

Other articles from from the most recent ScienceMatters@Berkeley: The New New Math of String Theory and Molecular Rules Of Engagement. Also see previous article: The Cellular Mechanic.