Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > CO2 makes life difficult for algae

Abstract:
The acidification of the world's oceans could have major consequences for the marine environment. New research shows that coccoliths, which are an important part of the marine environment, dissolve when seawater acidifies. Associate Professor Tue Hassenkam and colleagues at the Nano-Science Center, University of Copenhagen, are the first to have measured how individual coccoliths react to water with different degrees of acidity.

CO2 makes life difficult for algae

Copenhagen, Denmark | Posted on May 12th, 2011

Coccoliths are very small shells of calcium carbonate that encapsulate a number of species of alga. Algae plays an important role in the global carbon-oxygen cycle and thus in our ecosystem. Our seawater has changed because of our emissions of greenhouse gases and therefore it was interesting for Hassenkam and his colleagues to investigate how the coccoliths react to different types of water.

"We know that the world's oceans are acidifying due to our emissions of CO2 and that is why it is interesting for us to find out how the coccoliths are reacting to it. We have studied algae from both fossils and living coccoliths, and it appears that both are protected from dissolution by a very thin layer of organic material that the algae formed, even though the seawater is extremely unsaturated relative to calcite. The protection of the organic material is lost when the pH is lowered slightly. In fact, it turns out that the shell falls completely apart when we do experiments in water with a pH value that many researchers believe will be the found in the world oceans in the year 2100 due to the CO2 levels," explains Tue Hassenkam, who is part of the NanoGeoScience research group at the Department of Chemistry, University of Copenhagen.

Professor of Biological Oceanography Katherine Richardson has followed research in the acidification of the oceans and climate change in general and she hopes that the results can help to bring the issue into public focus.

"These findings underscore that the acidification of the oceans is a serious problem. The acidification has enormous consequences not only for coccoliths, but also for many other marine organisms as well as the global carbon cycle," explains Katherine Richardson, professor of biological oceanography and vice dean at the Faculty of Science at the University of Copenhagen.

Nano-microscope is the key
Tue Hassenkam is a nano-specialist and has been working for several years with the AFM (Atomic Force Microscope), which is an important instrument for nano researchers, because they can see and manipulate very small samples of, for example, geological materials like coccoliths.

"Using the AFM I weighed the coccoliths before and after they have been immersed in water with different compositions. The coccoliths weigh around 500 pg (0.0000000005 g). Specifically, I have set a coccolith on tip of an AFM and immersed the tip in water and looked at and weighed the coccolith afterwards. In that way I can say something about how much and how long it takes for a coccolith to dissolve in water with different degrees of acidity. I can use these results to say something about how important the water acidity is for the marine environment," explains Tue Hassenkam, who has just had his results published in the journal PNAS.

Measurements of such small materials are unique and very precise and there is therefore great potential in using the technique on other materials. For example, Tue Hassenkam has recently measured the dissolution of salt in ash from the Icelandic volcano Eyjafjallajökull which erupted last year.

####

For more information, please click here

Contacts:
Associate Professor Tue Hassenkam
Nano-Science Center
Phone: +45 26 55 20 30
Email:

Head of Administration & PR Rikke Bøyesen
Nano-Science Center
Phone: +45 28 75 04 13
Email:

Copyright © University of Copenhagen

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Transparent Conductive Films and Sensors Are Hot Segments in Printed Electronics: Start-ups in these fields show above-average momentum, while companies working on emissive displays such as OLED are fading, Lux Research says April 17th, 2014

Harris & Harris Group Continues Its Blog Series to Highlight Most Impactful Portfolio Companies With Champions Oncology, Inc. April 17th, 2014

Energy Research Facility Construction Project at Brookhaven Lab Wins U.S. Energy Secretary's Achievement Award April 16th, 2014

Imaging

Catching the (Invisible) Wave: UC Santa Barbara researchers create a unique semiconductor that manipulates light in the invisible infrared/terahertz range, paving the way for new and enhanced applications April 11th, 2014

Agilent Technologies Announces Fourth NanoMeasure Scientific Symposium: National Center for Nanoscience and Technology in Beijing to Host Event April 10th, 2014

Hawk Trade Secures Funding and Development Capital for Nanotec Industries: Nanotec Industries successfully negotiates funding for development of nano-sized treatment and imaging delivery device facility through Hawk Trade April 3rd, 2014

New JEOL-Nikon MiXcroscopy Correlative Imaging Solution March 27th, 2014

Discoveries

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Scientists observe quantum superconductor-metal transition and superconducting glass: A team including MIPT physicist observed quantum superconductor-metal transition and superconducting glass April 16th, 2014

UT Arlington physicist creates new nanoparticle for cancer therapy April 16th, 2014

Targeting cancer with a triple threat: MIT chemists design nanoparticles that can deliver three cancer drugs at a time April 15th, 2014

Announcements

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Transparent Conductive Films and Sensors Are Hot Segments in Printed Electronics: Start-ups in these fields show above-average momentum, while companies working on emissive displays such as OLED are fading, Lux Research says April 17th, 2014

Harris & Harris Group Continues Its Blog Series to Highlight Most Impactful Portfolio Companies With Champions Oncology, Inc. April 17th, 2014

Energy Research Facility Construction Project at Brookhaven Lab Wins U.S. Energy Secretary's Achievement Award April 16th, 2014

Tools

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Aerotech X-Y ball-screw stage for economical high performance Planar positioning April 16th, 2014

Malvern reports on the publication of the 1000th peer-reviewed paper to cite NanoSight’s Nanoparticle Tracking Analysis, NTA April 16th, 2014

JPK announces expansion of its global sales and service activities in China and USA April 15th, 2014

Environment

Trees go high-tech: process turns cellulose into energy storage devices April 7th, 2014

Fabricating Nanostructures with Silk Could Make Clean Rooms Green Rooms March 31st, 2014

University of Waterloo Engineering to Showcase Student Design March 14th, 2014

Iran Applying Nanotechnology in Growing Number of Industries March 10th, 2014

NanoNews-Digest
The latest news from around the world, FREE







  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE