Thursday, August 30, 2012

Dieting Monkeys Don't Live Longer?

In the news:
by Sabrina Richards
The Scientist
August 29, 2012
Mother barbary ape (Macaca sylvanus) and her young puzzle over a wrapper left by a tourist.
Credit: Jeanne White / Photo Researchers, Inc.

Hanuted by Hantavirus in Yosemite

In the news:
from: Centers for Disease Control and Prevention
August 29, 2012
Color enhanced transmission electron micrograph (TEM) of a Hantavirus. Hantavirus is a respiratory disease carried in wild rodents such as deer mice. Mice do not appear ill while carrying the hantavirus. People become infected after breathing airborne particles of urine, droppings or saliva from infected rodents. Hantavirus causes flu-like symptoms that eventually cause the lungs to fill with fluid, making breathing difficult. Medical attention must be sought as soon as infection is detected. Most cases of Hantavirus reported in the U.S. have been in the rural Western states.
Credit: Science Source
Colorization by: Mary Martin

Monday, August 27, 2012

Neil Armstrong (August 5, 1930 – August 25, 2012)

In the news:
By John Noble Wilford
New York Times
August 25, 2012
The Apollo 11 crew leaves Kennedy Space Center's Manned Spacecraft Operations Building during the pre-launch countdown. Mission commander Neil Armstrong, command module pilot Michael Collins, and lunar module pilot Buzz Aldrin prepare to ride the special transport van to Launch Complex 39A where their spacecraft awaited them.
Credit: NASA / Science Source

Friday, August 24, 2012

West Nile Outbreak Looms Large

In the news:
by Donald G. McNeil, Jr. 
New York Times
August 22, 2012
Color enhanced Transmission Electron Micrograph (TEM) of West Nile Virus (togaviridae) isolated from brain tissue. Magnification = 120,000x.
Credit: Chris Bjornberg / Photo Researchers, Inc.

Thursday, August 23, 2012

Melanoma and Nutrition - Linked?

In the news:
by Lowell Goldsmith
August 22, 2012
Computer generated model of the chemical structure of Vitamin A. Vitamin A maintains skin and mucus membranes, and is needed for night vision. Its absence from diet leads to weight loss, night blindness, and to an increased susceptibility to infections. Vitamin A is structurally related to carotene. Carotene is converted into vitamin A in the liver, two molecules of vitamin A are formed from on molecule of beta carotene, hence good sources of carotene, such as green vegetables are good potential sources of vitamin A. Vitamin A is manufactured from fish-liver oil and by synthesis from beta-ionone. Good sources of Vitamin A are butter, milk, cheese, yogurt, sweet potatoes, carrots, red peppers, chilies, leafy green vegetables, tomatoes, apricots, and melons.
Credit: Kenneth Eward / BioGrafx / Photo Researchers, Inc.

Tuesday, August 21, 2012

A Pox Upon your Chickenpox

In the news:
by Kate Yandell
New York Times
August 20, 2012
Varicella-zoster virus (VZV) entering the bloodstream. VZV s a herpes virus that can cause chickenpox in children and shingles (Herpes zoster) in adults. The virus is transmitted by airborne viral particles shed from the skin of an infected person. The new host breathes in the virus, which enters the mucous membrane in a person's respiratory tract and begins to spread without its envelope from cell to cell. The virus invades T-cells of the blood and those T-cells carry the virus to the skin. There, the virus can recreate its envelope because the top layer of the skin lacks the endosomal pathway that removes glycoproteins from the envelope.
Credit: Carol and Mike Werner / Photo Researchers, Inc.

Friday, August 17, 2012

Ironing out Iron Consumption

In the news:
Jane E. Brody
New York Times
August 13, 2012
Light micrograph of a section of human liver affected by hemosiderosis, a condition characterized by the excessive deposition of iron in the liver and caused by a high dietary intake or following repeated blood transfusions. Iron is stored as hemosiderin in the Kuppfer cells and hepatocytes (liver cells) and causes liver cell death and cirrhosis. Here, some cells contain large quantities of iron which has been stained black. Acomparable condition, hemochromatosis, results from an inherited defect in iron metabolism and affects other organs in addition to the liver. Magnification: x100 at 35mm size.
Credit: Astrid & Hanns-Frieder Michler / Photo Researchers, Inc.

Thursday, August 16, 2012

Triclosan, the Dirt on Antibacterial Soap

In the news:
by Joseph Stromberg
August 13, 2012
Triclosan is a potent wide-spectrum antibacterial and antifungal agent. It is used in soaps (0.10-1.00%), deodorants, toothpastes, shaving creams, mouth washes, and cleaning supplies. It may also be used in kitchen utensils, toys, bedding, socks, and trash bags. Triclosan reduces bacterial contamination on the hands and on treated products. Showering with 2% triclosan is a recommended procedure to decolonize patients whose skin carries methicillin-resistant Staphylococcus aureus (MRSA). At low concentrations, triclosan acts as a bacteriostatic; it targets bacteria mainly by inhibiting fatty acid synthesis. Key: Carbon: blue, Hydrogen: cream, Chlorine: yellow, Oxygen: green.
Credit: Scimat / Photo Researchers, Inc.

Monday, August 13, 2012

Replaceable You

In the news:
By Ed Yong
August 1, 2012
Representation of different transplants: cornea, heart, cardiac valves, liver, pancreas, hand, intestines, bones, blood vessels, cells, kidney, lungs, skin.
Credit: Dominique Duval / Photo Researchers, Inc.

Thursday, August 9, 2012

Wednesday, August 8, 2012

MMR Protected From 'Babyjabs'

In the news:
BBC News Health
August 7, 2012
MMR vaccine being drawn into a syringe. This combined vaccine protects infants from three viral diseases: measles, mumps and rubella. The first injection is given in a child's second year, followed by a booster three years later. The vaccine consists of weakened samples of the three viruses. When injected, the vaccine stimulates the body's immune system to produce antibodies, but without causing infection. The immune system can then respond quickly against future infections by the viruses. In recent years, there has been public concern about a possible link between the MMR vaccine and autism. However, epidemiological studies suggest that there is no link.
Credit: Tek Image / Photo Researchers, Inc.

Tuesday, August 7, 2012

Cardiac Catheterizations, For Profit

In the news:
by Reed Abelson and Julie Creswell
New York Times
August 6, 2012

Inserting a catheter into an artery in the arm; from there it will be advanced into the right coronary artery.
Credit: Michelle Del Guercio / Photo Researchers, Inc.

Monday, August 6, 2012

Mars Curiosity

In the news:
By Steve Gorman
August 6, 2012
The NASA Mars rover Curiosity, launched on November 26, 2011, landed on Mars on August 6, 2012. Curiosity's main goal is to assess whether Mars is, or ever was, an environment able to support life.
Credit: NASA / Science Source