Sunday, 3 May 2009

Johnald's Fantastical Daily Link Splurge

Johnald's Fantastical Daily Link Splurge

APOD: Star Hoodie

Posted: 03 May 2009 09:50 AM PDT


Antigenic Shift - The Spread of a New Mutated Virus

Posted: 03 May 2009 08:31 AM PDT

(13 votes - 1 comment - 142 views)
This video describes the process by which viruses can share a segment of their gemone with another strain during infection.

the influenza Type-A virus is capable of what is known as antigenic shift. The current flu in circulation is an entirely new, mutated pathogen formed from elements of human, pig, and avian virus strains.

A sudden shift in the antigenicity of a virus resulting from the recombination of the genomes of two viral strains. Antigenic shift is seen only with influenza A viruses. It results usually from the replacement of the hemagglutinin (the viral attachment protein that also mediates the entry of the virus into the cell) with a novel subtype that has not been present in human influenzaviruses for a long time. The source of these new genes is the large reservoir of influenzaviruses in waterfowl. The consequences of the introduction of a new hemagglutinin into human viruses is usually a pandemic, or a worldwide epidemic.

Mechanisms of Self-Control Pinpointed in Brain

Posted: 03 May 2009 08:10 AM PDT

When you're on a diet, deciding to skip your favorite calorie-laden foods and eat something healthier takes a whole lot of self-control -- an ability that seems to come easier to some of us than others. Now scientists have uncovered differences in the brains of people who are able to exercise self-control versus those who find it almost impossible.

YouTube - Cosmosis - Contact

Posted: 03 May 2009 07:27 AM PDT

The Eskimo Nebula from Hubble

Posted: 03 May 2009 06:06 AM PDT

The Eskimo Nebula from Hubble In 1787, astronomer William Herschel discovered the Eskimo Nebula. From the ground, NGC 2392 resembles a person's head surrounded by a parka hood. In 2000, the Hubble Space Telescope imaged the Eskimo Nebula. From space, the nebula displays gas clouds so complex they are not fully understood. The Eskimo Nebula is clearly a planetary nebula, and the gas seen above composed the outer layers of a Sun-like star only 10,000 years ago. The inner filaments visible above are being ejected by strong wind of particles from the central star. The outer disk contains unusual light-year long orange filaments. The Eskimo Nebula spans about 1/3 of a light year and lies in our Milky Way Galaxy, about 3,000 light years distant, toward the constellation of the Twins (Gemini).

Posted: 03 May 2009 05:09 AM PDT

Posted: 03 May 2009 05:08 AM PDT

Posted: 03 May 2009 05:08 AM PDT

Posted: 03 May 2009 05:08 AM PDT

YouTube - Chemical Brothers ft Richard Ashcroft - The Test

Posted: 03 May 2009 04:56 AM PDT