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Archive for February, 2013

Peer Review

February 22, 2013 Leave a comment

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Researchers at GIT show spontaneous assembly of “proto-RNAs” in water

February 21, 2013 Leave a comment

Really interesting work. Essentially shows that stacking interactions and hydrogen bonding of the nitrogenous bases is sufficient to form a “proto-RNA” filament. While far from being definitive proof of anything, this work certainly builds on and supports the RNA-world hypothesis for the origins of life. Very cool stuff, will update this post when more information becomes available.

Excerpt from “Molecules assemble in water, hint at origins of life” in e! Science News

 

Researchers at the Georgia Institute of Technology are exploring an alternate theory for the origin of RNA: they think the RNA bases may have evolved from a pair of molecules distinct from the bases we have today. This theory looks increasingly attractive, as the Georgia Tech group was able to achieve efficient, highly ordered self-assembly in water with small molecules that are similar to the bases of RNA. These “proto-RNA bases” spontaneously assemble into gene-length linear stacks, suggesting that the genes of life could have gotten started from these or similar molecules.

The discovery was made by a team of scientists led by Georgia Tech Professor Nicholas Hud, who has been trying for years to find simple molecules that will assemble in water and be capable of forming RNA or its ancestor. Hud’s group knew that they were on to something when they added a small chemical tail to a proto-RNA base and saw it spontaneously form linear assemblies with another proto-RNA base. In some cases, the results produced 18,000 nicely ordered, stacked molecules in one long structure.

Hud concedes that scientists may never be 100 percent sure what existed four billion years ago when a complex mixture of chemicals started to work together to start life. His next goal is to determine whether the proto-RNA bases can be linked by a backbone to form a polymer that could have functioned as a genetic material.

 

CGPSA’s Non-Resident Tuition Fee (NRTF) Forum 2/20/13 2PM International House

February 11, 2013 Leave a comment

CGPSA’s Non-Resident Tuition Fee (NRTF) Forum

 Are you a graduate student who is concerned about NRTF ?

Are you wondering about how it impacts you ?

Are you wondering about the CGPSA’s NRTF student petition and it’s outcome?

Are you a faculty who can’t hire international PhD students because of the high NRTF?

Get your questions answered regarding NRT issue by the panel of invited speakers:

Jeffery Gibeling, Dean of Graduate Studies

Kelly Ratliff, Associate Vice Chancellor, Budget and Institutional Analysis

Rachael Goodhue, Chair of Graduate Council, Professor, Agricultural and Resource Economics

Ruth Asmundson, Former mayor of the City of Davis

Sarah Ligday, Lead International Student Advisor at SISS

When :

Date: Wednesday, February 20

Time: 2:00-3:30 pm

Location: International House

Refreshments will be provided !!

RSVP :

http://tinyurl.com/NRT-workshop

 Hosted by :

Chancellor’s Graduate and Professional Advisory Board (CGPSA)

http://gradstudies.ucdavis.edu/about/cgpsa.html

 Questions:

Please contact cgpsa.ucd@gmail.com