Wednesday, November 30, 2011

It's a Bird! It's...a LOT of planes!

In the news:
By Michael J. De La Merced
New York Times online
November 29, 2011

Air traffic routes between North America and Europe. Global map showing air traffic routes superimposed over satellite images of cities illuminated at night. North America at far left and Europe at far right. This image illustrates modern human impact on the planet.

Credit: Félix Pharand-Deschênes, Globaïa / Photo Researchers, Inc.

Medicine In Motion!

If a picture is worth a thousand words, then video speaks 30,000 words every second! Video clips can provide more information and engage a viewer's attention longer than still images alone. The new video collection from Science Source, long a leader in scientific and medical photography, is online!   
 




 
But wait, there's more!
Photo Researchers has a YouTube Channel, too! 
 

Tuesday, November 29, 2011

Pining after Pollen?

In the news:
By Susan Milius
ScienceNews online
December 3rd print issue

SE8078
Pollen tubes. Colored scanning electron micrograph (SEM) of pollen tubes (orange) on the pistil of a prairie gentian flower (Gentiana sp.). Pollen contains the male sex cells of a flowering plant. Once the grains land on the pistil (female parts) of a flower, the pollen grains form tubes that burrow down through the stigma (tip) and style (shaft) of the pistil to reach the ovule, which contains the ovum, the female sex cell. This is fertilized, forming a seed.
Credit: Susumu Nishinaga / Photo Researchers, Inc.

Monday, November 28, 2011

Wednesday, November 23, 2011

The Tired Turkey Myth

In the news:
By Lisa Zamosky
WebMD.com
Melatonin and the pineal gland. Computer artwork of sectioned human brains in side view, depicting secretion of the hormone melatonin by the pineal gland (highlighted). The chemical formula for melatonin is shown. Front of the brain is at left. Melatonin is a hormone secreted in the blood which helps induce sleep and set the biological rhythm of the body.

Credit: Alfred Pasieka / Photo Researchers, Inc.

Tuesday, November 22, 2011

Chewing Gum Prevents Ear Infections? Really?

In the news:
"Really? 
The Claim: 
Chewing Gum 
Can Prevent 
Ear Infections"
By Anahad O'Connor
New York Times
November 21, 2011


SL0078

Polarized light micrograph of crystals of xylitol. This is a five-carbon sugar alcohol which tastes sweet and is found in fruit, fungi, vegetables, birch trees and coconut husks. Substituting xylitol for sucrose in the diet inhibits tooth decay because, unlike other sugars, it is not fermented to acid by oral bacteria. These bacteria continue to metabolize nitrogen-containing substances in our food and saliva thus raising the pH and increasing remineralization of tooth enamel. Xylitol is used to make dentally safe lozenges, chewing gum, pill-coatings and toothpaste. Magnification: x10 at 35mm size.
Credit: Sidney Moulds / Photo Researchers, Inc.

Monday, November 21, 2011

Durable Plastic




In the news:
By Rachel Ehrenberg
ScienceNews online 
November 17, 2011









Reinforced plastic. Color-enhanced scanning electron micrograph (SEM) of carbon fiber-reinforced plastic. The plastic (epoxy resin, yellow) is heat resistant up to 400 degrees centigrade. High-strength carbon fibers (grey) are embedded in it, which effectively absorb the stresses occurring in the material. The composite material is used in the aerospace and automotive industries, and in computer circuit boards and electronics. Magnification: x1920 when printed 10 centimeters wide.
Credit: Eye of Science / Photo Researchers, Inc.

Friday, November 18, 2011

Thursday, November 17, 2011

Anxiety Gene

In the news:
"Chromosome glitch tied to separation anxiety"
By Tina Hesman Saey
ScienceNews online
November 17, 2011

A normal female karyotype, the full complement of female chromosomes arranged in numbered homologous pairs. They are numbered 1-23 from top left to bottom right, the last pair being the sex chromosomes. They are obtained by matching unpaired chromosomes during the metaphase stage of cell division. Each member of a homologous pair is similar in length & banding pattern. Male & female sets differ only in the sex chromosome: a male is labeled XY, a female XX. Each human cell contains 46 chromosomes in total, 23 of maternal & 23 of paternal origin.

Credit: Scott Camazine & Sue Trainor / Photo Researchers, Inc.



Wednesday, November 16, 2011

Iridescence Protected Ancient Moths

In the news:
"Ancient moth sported a green sheen"
By Sid Perkins
nature.com
November 15, 2011

BK4707
Forester Moth (Adscita statices) on clover flower. Forester moths are generally day-flying, nectar-feeding moths. Europe.

Credit: David Hosking / Photo Researchers, Inc.






Tuesday, November 15, 2011

Medical Research on Chimpanzees?

2U4478
Captive chimpanzee (Pan troglodytes).

Credit: Nigel J. Dennis / Photo Researchers, Inc.










In the news:
"Chimps' Days in Labs May Be Dwindling"
By James Gorman
New York Times online
November 14, 2011

Monday, November 14, 2011

Specializing Parasites (Schistosoma mansoni)

In the news:
"Parasites drove human genetic variation"
By Cassandra Willyard
nature.com
November 11, 2011


BB3055
Schitosoma parasites; male and female together. This fluke lives in the veins of the intestines and bladder, attaching itself to blood vessel walls using a suction pad (center). The female lives in the groove on the male's back. It ingests blood cells through its mouth. Schistosome eggs pass into water in urine and feces. The larvae produced can infect humans through their skin. Enlargement 280x.

Credit: Eye of Science / Photo Researchers, Inc.





Memory

In the news:
"Exceptional memory linked to bulked-up parts of brain"
By Laura Sanders
ScienceNews online
November 13, 2011
SA3155
Obsessive-compulsive disorder. Colored Positron Emission Tomography (PET) scans of a human brain, showing active areas in obsessive compulsive disorder. The brain is sectioned axially (left), sagittally (center), coronally (at right). In this patient, positive correlations (activity increases as symptoms get stronger) are in the top row, seen colored in the left orbital region, prefrontal, left frontal gyri & thalamus. Negative correlation (activity decreasing as symptoms strengthen) are in the bottom row in the right frontal gyrus and parietal regions. Active areas colored red/yellow show blood flow detected by a radioactive tracer.

Credit: WDCN / Univ. College London / Photo Researchers, Inc.



Thursday, November 10, 2011

Magnetic Moon


In the news:
Science News online
November 9, 2011






BS8610
Totality during a lunar eclipse. A lunar eclipse occurs as the Moon passes into the Earth's shadow. The red light is due to shorter wavelengths, such as blue light, being scattered more in the atmosphere than longer wavelengths such as red light. Lunar eclipses occur only at full Moon, and then only when the Earth and Moon are correctly aligned (about 2-3 times a year). This image was obtained by combining exposures from a Schmidt-Cassegrain telescope. The eclipse took place on March 3, 2007, this view is from Sicily, Italy.

Credit: Philippe Morel / Photo Researchers, Inc.


Wednesday, November 9, 2011

The Sky Didn't Hit Earth When It Fell! (phew)

In the news:
"Giant asteroid passes near Earth"
BBC News online
November 9, 2011



BR9683
Meteor Crater aka Barringer Crater or Canyon Diablo near Winslow, Arizona. A nickel-iron meteorite about 50m across impacted the plain some 50,000 years ago carving out a crater 1,200m in diameter and 170m deep. Its rim rises 45m above the surroundings. Purchased in 1903 by mining engineer Daniel Barringer who hoped to exploit the presumed large iron-nickel mass. But the mining bonanza evaporated as had most of the meteorite upon impact. It is still owned by the Barringer family.

Credit: Georg Gerster / Photo Researchers, Inc.

Tuesday, November 8, 2011

Babbage's Analytical Engine





In the news:

"It Started Digital Wheels Turning"
By John Markoff
November 7, 2011
New York Times






SA2754
Babbage's Analytical Engine. A "mill", or part, of the Analytical Engine designed by Charles Babbage (1791-1871). This was completed in 1910 by Babbage's son. The Analytical Engine was a development of Babbage's earlier Difference Engine. Both were designed as mechanical calculators, originally to help with work in numerical problems in the calculus. Both machines were left unfinished at the time of Babbage's death. The principles established by the concept of these machines, however, are fundamental in computing and are applied today.

Credit: SPL / Photo Researchers, Inc.

Monday, November 7, 2011

Friday, November 4, 2011

Eternal Youth?

In the news:
"Signs of Aging Halted in the Lab"
By James Gallagher
BBC News online
November 2, 2011

BQ2739
Muscular atrophy.
Light micrograph of a section through muscle fibers showing an area affected by neurogenic muscular atrophy (bottom right). Normal muscle fibers are seen at top left. Nerve damage has lead to the muscle fibers becoming shrunken and atrophied (wasted). It is only the muscle fibers controlled by the damaged nerves
that are affected.

Credit:
Biophoto Associates /
Photo Researchers, Inc.

Thursday, November 3, 2011

Screening Cancer Screening

In the news:
"Considering When It Might Be Best Not to Know About Cancer"
By Gina Kolata
New York Times
October 30, 2011


SA6375
Mammography. Woman undergoing breast screening by X-ray mammography, a technique which reveals the fine details of internal breast tissues. The breast is compressed into a flat plane between a plastic sheet and a metal X-ray plate. Breast tissue is then exposed to low-dose X-rays from the X-ray machine (upper right) to form a mammogram. Mammography is used to routinely screen women in order to detect breast tumors at an early stage. Once a tumor has been located, other techniques are employed to identify it. Biopsy (tissue sampling) of the tumor will confirm whether it is cancerous. Photographed at the European Institute of Oncology in Milan, Italy.

Credit: Mauro Fermariello / Photo Researchers, Inc.


Wednesday, November 2, 2011

Type 1 Diabetes

In the news:
"More Ways to Cope With Type 1 Diabetes"
By Jane E. Brody
New York Times online:
October 24, 2011






BT4760

Kindergarten teacher helps student (age 6)
with type one diabetes check her blood-sugar levels.
Credit:
Ellen B. Senisi / Photo Researchers, Inc.

Tuesday, November 1, 2011

Check Your Receipt...for BPA


In the news:
"Check Your Receipt: It May Be Tainted"
By Rachel Nuwer
New York Times online:
November 1, 2011






SK9835
Bisphenol A, molecular model. This chemical is used in the plastics industry, both as an antioxidant and as a component of epoxy resins and polycarbonate plastics. Atoms are represented as spheres are color-coded: carbon (black), oxygen (red) and hydrogen (white).
Credit:
Dr. Mark J. Winter / Photo Researchers, Inc.