Tuesday, April 23, 2013

Fertilizer Grows Plants, and Fires

In the news:
by Henry Fountain
New York Times
April 19, 2013


An ammonium nitrate explosion. Ammonium nitrate is a common oxidizing agent in explosive devices.
Credit: Charles D. Winters / Science Source


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Monday, April 22, 2013

The Ven of Aging and Illness

In the news:
Hannah Fairfield and Matthew Bloch 
New York Times
April 15, 2013


Old man walks on path through urban park. England
Credit: Peter Bowater / Science Source

Saturday, April 20, 2013

Shrapnel from Bombings: Leaves Tragedy and Clues

In the news:
by Noam N. Levey and Alan Zarembo
Los Angeles Times
April 16, 2013
Saggital x-ray of the skull reveals a bomb fragment in a patient's skull.
Credit: BSIP / Science Source
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Wednesday, April 17, 2013

Beer: Buzzing with Flavor

In the news:
by Sabrina Richards
The Scientist
April 15, 2013
Illustration of the behavior of neurotransmitters in a synapse between two neurons. Neurotransmitters are endogenous chemicals that transmit signals from a neuron to a target cell across a synapse. In response to an electrical signal in the transmitting neuron, vesicles containing neurotransmitters fuse with the cell wall allowing the neurotransmitters to enter the synapse. They move toward the receiving neuron and attach themselves to receptors (green), relaying the message. Extra neurotransmitters migrate back to the transmitting cell via reuptake transporters.
Credit: Carol and Mike Werner / Science Source


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Friday, April 12, 2013

Worth the Postage - Francis Crick's Letter

In the news:
by Alan Boyle
NBC News
April 10, 2013
Beta DNA. Computer representation of a segment of the beta form of the molecule Deoxyribonucleic Acid (DNA). This molecule contains all inherited instructions necessary for the development of a living organism. Atoms are shown as spheres. The DNA molecule is composed of two strands of atoms twisted into a helical shape. Each strand consists of an outer sugar-phosphate backbone (gold) from which the bases project inwardly (silver). The bases are thus paired in a complementary fashion like rungs on a ladder, making up the genetic code. This code is divided into segments called genes. DNA is also the vehicle of genetic inheritance between different generations.
Credit: Kenneth Eward / BioGrafx / Science Source

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Tuesday, April 9, 2013

Can You Hear Me Now? The Real Sounds of Hearing Loss

In the news:
by Audrey Carlsen
NPR
April 6, 2013
  BL2404
Conceptual image representing frequency. Sound byte on a grid moving through an ear.
Credit: Mike Agliolo / Science Source


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What Do Women Want? Men Still Unsure.

In the news:
by Regina Nuzzo
nature.com
April 8, 2013
This anonymous Persian anatomical illustration (Iran or Pakistan, ca. 1680-1750) depicts a man with his abdomen and chest opened to reveal the internal organs. In his right hand, he holds a second set of genitalia, and there is a sketch of the liver and gallbladder in the upper left corner. The artistic conventions employed in the production of this illustration indicate Western India as a place of production. The 16th- to 18th-century European convention of picturing partially dissected bodies as if they were alive, offering up parts of their own body for further inspection, can be seen here transferred to the Indian subcontinent. The anatomy of the exposed organs reflects indigenous Indian concepts as well as some medieval Galenic anatomy. This is one of six anonymous anatomical drawings on folia 554-559 at the end of a volume containing Tibb al-Akbar (Akbar's Medicine) by Muhammad Akbar, known as Muhammad Arzani (d. 1722/ 1134) in an undated copy probably made in the 18th century.
Credit: National Library of Medicine / Science Source


 

Monday, April 8, 2013

Saccharomyces cerevisiae - Thanks for the Beer

In the news:
by Nancy Shute
NPR
April 5, 2013


2Y3096
A polarized light micrograph of living Saccharomyces cerevisiae, a species of budding yeast used in baking and brewing. Magnification: 400x. Differential Interference Contrast microscopy (DIC), also known as Nomarski Interference Contrast (NIC) or Nomarski microscopy, an optical microscopy illumination technique used to enhance contrast.
© Michael Abbey / Science Source









Yeast (Saccharomyces cerevisiae).
© Michael Abbey / Science Source








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The Brain - The New Fronteir

In the news:
by Jon Hamilton 
NPR
April 2, 2013
SD3731  
Brain pathways. Coloured 3-dimensional magnetic resonance imaging (MRI) scan of the white matter pathways of the brain, side view. White matter is composed of myelin-coated nerve cell fibres that carry information between nerve cells in the cerebrum of the brain (top half of image) and the brain stem (bottom centre). This image was created by an MRI scanner sensitised to the movement of water around the brain. Blue represents neural pathways from the top to the bottom of the brain, green represents pathways from the front (left) to the back (right), and red shows pathways between the right and left hemispheres of the brain.
Credit: TOM BARRICK, CHRIS CLARK, SGHMS / Science Source

Wednesday, April 3, 2013

Here Be Dragons!

In the News:
by Natalie Angier
New York Times  
April 2, 2013
Dragonfly in flight © Stephen Dalton/ Science Source
BJ9924
Emperor Dragonfly (Anax imperator) male in flight.
©Stephen Dalton/ Science Source


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Tuesday, April 2, 2013

Living Fossils Obviously Not Fossilized

In the news:
by Ed Yong
The Scientist
April 2, 2013
  FB0679
Three shield shrimp (Triops australiensis) in a pool, Australia.
Credit: ANT Photo Library / Science Source



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