Add your Article
- Agriculture
- Growing Healthier Tomato Plants
- Protecting Cows—and People—from a Deadly Disease
- New Gene Fights Potato Blight
- Chemistry and Materials
- Cold, colder and coldest ice
- A Framework for Growing Bone
- Silk’s superpowers
- Dinosaurs and Fossils
- The bug that may have killed a dinosaur
- Feathered Fossils
- Three strikes wiped out woolly mammoths
- E Learning Jamaica
- E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
- Results of GSAT are in schools this week
- 2014 GSAT Results for Jamaican Kids
- GSAT Exam Preparation Jamaica
- Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
- Ministry of Education Announces 82 GSAT Scholarships for 2010
- 42,000 students will sit for the GSAT Exam in two weeks
- GSAT Exams Jamaica Scholarships
- GSAT Exam Preparation
- GSAT stars reap scholarship glory
- Access denied - Disabled boy aces GSAT
- Human Body
- Sea Kids See Clearly Underwater
- Teen Brains, Under Construction
- Fighting Off Micro-Invader Epidemics
- Parents
- What Not to Say to Emerging Readers
- Choosing a Preschool: What to Consider
- Expert report highlights the importance to parents of reading to children!
- Space and Astronomy
- Super Star Cluster in the Neighborhood
- Slip-sliding away
- Big Galaxy Swallows Little Galaxy
Bugs with Gas
Published: 07/01/2010
You may know of propane as the gas that fires up camp stoves or fuels outdoor grills. Researchers have now found that microbes living under the ocean floor appear to produce propane and another gas called ethane. These microbes chew up ancient organic material, such as leaves and twigs buried in the sand, and they generate the gases as waste products. That's a surprise. Scientists had thought that propane and ethane could be produced only in the same way that petroleum is—by great heat applied to ancient, buried material. A team led by Kai-Uwe Hinrichs of the University of Bremen in Germany went on a research ship equipped with an enormous drill that dug out cylinders of sand or rock thousands of feet long. When the researchers examined these cylinders, they found traces of ethane and propane locked in the sediment. Normally, to generate these gases, Earth's heat cooks organic material in sand for many thousands of years. This can happen only at spots above cracks in Earth's crust, where heat can leak out from inside Earth, and where thick layers of sediment would act like a blanket. But the samples that Hinrichs and his coworkers had looked at contained thin layers of sediment. Some cylinders had also been obtained from places far from any cracks in Earth's crust. So where could the gases be coming from? Scientists already knew that microbes could break down organic material to produce a related, simpler gas called methane. So, undersea microbes were the only thing that made sense. "When you can't come up with any geologic source, then biology is an obvious candidate," Hinrichs says. The finding may someday lead to practical applications. Propane is valuable as a fuel, and ethane is used to make plastics. Pulling propane and ethane out of sediment is too difficult to be practical. But if scientists can better understand how microbes create the gases, they might be able to use the microbes' methods to make ethane and propane directly from organic material.—J. Rehmeyer
Bugs with Gas
