Year: 2013 (page 4 of 36)

bacterial profiles by ethnicity

A Venn diagram showing bacterial profiles by ethnicity.

A group of researchers can determine your ethnicity by sampling bacterial from your mouth. From Popular Science:

Almost 400 different species were thriving in the mouths of 100 people from four different ethnic backgrounds: African American, Caucasian, Latino and Chinese. Only 2 percent of bacterial species identified were present in every individual studied. Another 8 percent of species were shared by 90 percent of the participants. Each ethnic group displayed a distinct pattern of bacteria, especially under the gums. “This suggests that the host genotype influences the microbial community to a greater extent than shared environment,” the study’s authors write.”‘Nature’ appears to win over ‘nurture’ in shaping this community.”

The researchers were able to develop an algorithm that could predict an individual’s ethnicity based on bacteria from under their gums with 62 percent accuracy. The algorithm was able to classify the bacterial communities of African American participants 100 percent of the time, but wasn’t as accurate for other ethnicities.

Read the original research at PLOS One

2013 nobels

Nobel_medal

The 2013 Nobel prizes in medicine, physics, and chemistry were awarded this week, with the medals for literature, peace and economics are yet to come.

In medicine, James Rothman, Randy Schekman and Thomas Südhof received the prize for elucidating trafficking mechanisms within cells. Cells use vesicles (membrane enclosed bubbles) to transport different cargo between cellular compartments or to other cells. The three researchers won the award for discovering how these vesicles get directed to their intended target and how the cargo is eventually delivered. The Nobel summary can be found here.

In physics, the award goes to François Englert and Peter Higgs. Admittedly, I understand next to nothing about the Higgs boson, except that it is a subatomic particle that was confirmed to exist earlier this year. Particle physics is astonishing. You can read the summary here.

And in chemistry the prize goes to three scientists, Martin Karplus, Michael Levitt and Arieh Warshel. These three chemists, have developed computational models for complex chemical systems. The researchers are being recognized for basically pioneering this whole field. The computations are relevant to multiple areas of chemistry including protein folding, electron transfer and catalysis. The Nobel report is here.

Congratulations to the newly minted laureates.

my science fair projects were never this cool

2013 Google Science Fair winners

2013 Google Science Fair winners

Google has announced the winners of their 2013 science fair:

  • Viney Kumar designed a program that lets drivers know when emergency vehicles are approaching. Hopefuly the program will be able to communicate with cars or drivers through cell phone signals.
  • Ann Makosinski developed a flashlight that gets power when you hold it. By using Peltier tiles,  the difference in temperature between your hand and the ambient air can generate enough power to provide light without any need for batteries
  • Eric Chen was the grand prize winner. He developed a computer model to generate new anti-influenza drugs. The molecules are inhibitors of endonuclease activity and might be active against all flu strains.

These are some smart kids! Read more about their projects here, at the Google Science Fair site and at the Google blog.

 

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