Thursday, February 28, 2013

Deadly New Coronavirus

In the news:
by Tina Hesman Saey
Science News
February 27, 2013 
Coronavirus, a single-stranded RNA-containing virus that causes respiratory infection in humans.
Credit: Eye of Science / Science Source

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Wednesday, February 27, 2013

Insulin Levels Regulated by Circadian Clock

In the news:
by Tina Hesman Saey
Science News
February 22, 2013

The islets of Langerhans are groups of specialized cells in the pancreas that make and secrete hormones. There are five types of cells in an islet: alpha cells (blue) that make glucagon, which raises the level of glucose (sugar) in the blood; beta cells (yellow -- shown in crossection) that make insulin; delta cells (purple) that make somatostatin which inhibits the release of numerous other hormones in the body; and PP cells and D1 cells, about which little is known. Insulin molecules are shown as green spheres; glaucagon molecules as blue spheres and glucose molecules as gray spheres. Insulin and glucagon can be seen entering the blood stream through the walls of capillaries. Degeneration of the insulin-producing beta cells is the main cause of type I (insulin-dependent) diabetes mellitus. Labeled.

Credit: Carol and Mike Werner / Science Source

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Electric Field of Flowers

In the news:
by Susan Milius
Science News
February 21, 2013 
Striped squill in UV light. Striped squill flower (Puschkinia scilloides) photographed to show areas that reflect ultraviolet (UV) light (base of petals) or absorb UV light (fused stamens at center of flower). The UV pattern, known as a 'nectar guide', is thought to help attract pollinating insects, which can see in UV light. This image was taken on a digital camera adapted to filter and detect UV light. UV light lies outside the visible spectrum, hence it has no true color. The monochrome image resulting from the camera is colored on computer. See image B830/3465 for the same plant in normal daylight.
Credit: Bjorn Rorslett / Science Source

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Friday, February 22, 2013

Silicone Chips Not Nano Enough?

In the news:
 by John Markoff
New York Times - Technology
February 19, 2013
Buckytube. Computer artwork of a carbon nanotube, also known as a buckytube, showing the hexagonal carbon structure. This is a type of fullerene, a structural type (allotrope) of carbon. Fullerenes, which were first discovered in 1985 can be used as catalysts, lubricants and superconductors.
Credit: Pasieka / Science Source

Tuesday, February 19, 2013

Folic Acid Supplements During Pregnancy Reduce Risk of Autism

In the news:
by Roni Caryn Rabin
New York Times
February 12, 2013 
Vitamin B9, molecular model. The chemical formula for vitamin B9, also called folic acid or folate, is C19.H19.N7.O6. Atoms are represented as spheres and are color-coded: carbon (blue), hydrogen (gold), nitrogen (dark blue) and oxygen (red). Vitamin B9 is most concentrated in leafy vegetables such as spinach, legumes, seeds and other fruit and vegetables. It is required for fetal development in pregnancy. It also ensures normal red blood cell formation and helps to maintain a healthy central nervous system. Folate deficiency can lead to the development of forms of anemia and leukemia.
Credit: Dr. Mark J. Winter / Science Source


Thursday, February 14, 2013

Birds and Bees Do It...

Animal Valentines

Birds do it, bees do it, even educated fleas do it! And it's comforting to know that we all pretty much look equally ridiculous doing it, regardless of species!  So hide the children and enjoy Valentine's Day from around the Animal Kingdom!

Mating European bee-eaters (Merops apiaster) in the Danube Delta, Romania, in June.
Credit: Berndt Fischer / Science Source

Wednesday, February 13, 2013

2013 State of the Union - Picture It

In the news:

Barack Obama

February 12, 2013

X-ray of a briefcase with a gun.
Credit: Scott Camazine / Science Source
Nor'easter Coats Hurricane Sandy destruction on Staten Island with snow
Credit: Julie Dermansky / Science Source
Piggy Bank on a Pile of Pennies
Credit: Jim Corwin / Science Source
White Paper Mill - Minnesota
Credit: Tom Hollyman / Science Source
American citizens voting on election day in Boise, Idaho.
David R. Frazier / Science Source

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Tuesday, February 12, 2013

Endovascular Therapy has Disappointing Results

In the news:
by Richard Knox
NPR - shots
Februaryy 8, 2013

Image: Stroke treatment, angiogram; endovascular therapy

Stroke treatment. Colored angiogram of the brain of a 48 year old patient after treatment for a massive cerebrovascular accident (CVA), or stroke. The stroke occurred due to a blocked middle cerebral artery causing areas of ischemia (lack of blood flow) to parts of the brain (see image M136/0348). Here, blood flow has returned after the blockage was targeted with thrombolytic (clot-busting) drugs (urokinase) and anticoagulants (heparin) using a catheter. The symptoms, such as hemiparesis and aphasia (trouble producing and understanding speech), then begin to fade. Angiograms use a contrast dye to highlight blood vessels.
Credit: Zephyr / Science Source

Friday, February 8, 2013

Vitamin D puts the D in Obesity

In the news:
by Nathan Seppa
Science News
February 5, 2013 


Obese woman working out in fitness class.
Credit: Carolyn A. McKeone / Science Source

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