Fresh Photons

yugodrom: časopis Galaksija, #107

Sun, 19 May 2013 16:00:26 -0400

yugodrom:

časopis Galaksija, #107

Human Immunodeficiency Virus, Alexey Kashpersky (High-Res).

Sun, 19 May 2013 08:00:09 -0400

Human Immunodeficiency Virus, Alexey Kashpersky (High-Res).

electricspacekoolaid: Bill Nye The Planetary Guy

Sat, 18 May 2013 16:00:20 -0400

electricspacekoolaid:

Bill Nye The Planetary Guy

jtotheizzoe: We never sit here under the weight of all this...

Sat, 18 May 2013 08:00:16 -0400

jtotheizzoe:

We never sit here under the weight of all this air, the 5 x 10^18 kg of atmosphere that sits above everyone on Earth, and say “Gosh, that sure is heavy!”

You don’t realize just how powerful that 1 bar (~100 kPa) of pressure is until a train car is filled with steam, allowed to cool, and then implodes ohmygod did that just happen?

hydrogeneportfolio: Minimal Posters - Five Great...

Fri, 17 May 2013 16:00:18 -0400

hydrogeneportfolio:

Minimal Posters - Five Great Mathematicians And Their Contributions.

thedemon-hauntedworld: Carl Sagan at the Very Large Array by...

Fri, 17 May 2013 08:00:26 -0400

thedemon-hauntedworld:

Carl Sagan at the Very Large Array by Daniel Owens | Redbubble

Carbon Shirt.

Thu, 16 May 2013 16:00:09 -0400

Carbon Shirt.

“Van der Waals heterostructures comprise a new class of...

Thu, 16 May 2013 14:12:00 -0400

“Van der Waals heterostructures comprise a new class of artificial materials formed by stacking atomically thin planar crystals. Here, we demonstrate band structure engineering in a van der Waals heterostructure composed of a monolayer graphene flake coupled to a rotationally aligned hexagonal boron nitride substrate. In our samples, [an] interplay between short- and long-wavelength effects resulted in a band structure described by isolated superlattice minibands and an unexpectedly large band gap at charge neutrality. This picture is confirmed by our observation of fractional quantum Hall states at ±5/3 filling and features associated with the Hofstadter butterfly at ultrahigh magnetic fields.” Via.

The best of both worlds.

Thu, 16 May 2013 09:53:20 -0400

The best of both worlds.

dancingphysicist: zewdy: WHOA Can’t stop watching.

Thu, 16 May 2013 08:00:04 -0400

dancingphysicist:

zewdy:

WHOA

Can’t stop watching.

juliepasini: “ATP Race!” A digital, educational game designed...

Wed, 15 May 2013 16:00:20 -0400

juliepasini:

“ATP Race!”

A digital, educational game designed to help high school students better visualize the Electron Transport Chain.

Art done by: © 2012 Julianne Pasini
Coding and research by: © 2012 Nicholas Saunders and Alyssa Oglesbee

ilovecharts: NBA: The Year In Scoring via pete3

Wed, 15 May 2013 08:00:05 -0400

ilovecharts:

NBA: The Year In Scoring

via pete3

byronegg: Delaware Today — This is a piece for Delaware Today...

Tue, 14 May 2013 16:00:18 -0400

sketch

byronegg:

Delaware Today

—

This is a piece for Delaware Today about young girls losing interest in science,technology, engineering and math related studies. The state’s schools and businesses are hoping to turn all this around. I love it when I come up with a few sketches that I still want to use for something and this was one of those times. A big thanks to AD Kelly Carter!

heythereuniverse: DNA: Celebrate the unknowns | Philip Ball On...

Tue, 14 May 2013 08:00:13 -0400

heythereuniverse:

DNA: Celebrate the unknowns | Philip Ball

On the 60th anniversary of the double helix, we should admit that we don’t fully understand how evolution works at the molecular level, suggests Philip Ball.

This week’s diamond jubilee of the discovery of DNA’s molecular structure rightly celebrates how Francis Crick, James Watson and their collaborators launched the ‘genomic age’ by revealing how hereditary information is encoded in the double helix. Yet the conventional narrative — in which their 1953 Nature paper led inexorably to the Human Genome Project and the dawn of personalized medicine — is as misleading as the popular narrative of gene function itself, in which the DNA sequence is translated into proteins and ultimately into an organism’s observable characteristics, or phenotype.

Sixty years on, the very definition of ‘gene’ is hotly debated. We do not know what most of our DNA does, nor how, or to what extent it governs traits. In other words, we do not fully understand how evolution works at the molecular level.

That sounds to me like an extraordinarily exciting state of affairs, comparable perhaps to the disruptive discovery in cosmology in 1998 that the expansion of the Universe is accelerating rather than decelerating, as astronomers had believed since the late 1920s. Yet, while specialists debate what the latest findings mean, the rhetoric of popular discussions of DNA, genomics and evolution remains largely unchanged, and the public continues to be fed assurances that DNA is as solipsistic a blueprint as ever.

[Read more]

biological-chemistry: Microbial physiology why haven’t you...

Mon, 13 May 2013 16:00:32 -0400

biological-chemistry:

Microbial physiology why haven’t you given me the resources to identify a bacterium. Dose anyone know how? I have a list of key attributes anyone know a website??

wnycradiolab: Julie Mecoli’s “Dark Matter” is a series of...

Mon, 13 May 2013 08:00:31 -0400

wnycradiolab:

Julie Mecoli’s “Dark Matter” is a series of artworks inspired by the University of Queensland Pitch Drop Experiment (if you want to seriously geek out about this, our story on the experiment is right here).

Mecoli’s pieces are made of bitumen. They start out looking like solids and slooooowly reveal their true liquid nature. Check out some of her other work here.

mucholderthen: From Salameandering: Lungs are what enabled the...

Sun, 12 May 2013 16:00:23 -0400

mucholderthen:

From Salameandering:

Lungs are what enabled the ancestors of all tetrapods to climb out of the Devonian soup some 400 million years ago … Since they utilize the vast surface area of alveoli for gas exchange, rather than the relatively limited amount of surface area provided by a creature’s skin …

An average human adult’s skin has a surface area of roughly 16-21 square feet

whereas the surface area of the alveoli inside that same human is about 100 square yards!

Amphibians are neither large, nor particularly active, … amphibians of the order Anura (ie: frogs) evolved four mechanisms for breathing:

through gills

via lungs

through their very permeable skin

through sensitive skin inside the mouth.

Lungless salamanders (2/3 of all salamander diversity) took things one step further and got rid of the primitive lungs all together, to rely solely on cutaneous gas exchange.

Read more at Salameandering Into Cutaneous Respiration.

“Caenorhabditis elegans (C. elegans) worms are stored on...

Sun, 12 May 2013 08:00:21 -0400

“Caenorhabditis elegans (C. elegans) worms are stored on agar plates covered with a lawn of E. coli bacteria as their food source. Sometimes when the C. elegans have consumed all of the bacteria, they begin to clump together as seen in this image. I found the pattern on this plate particularly lovely, and was able to capture it with my cell phone by holding the lens of my phone’s camera up to the microscope eyepiece. I’ve since shared the photo on social networking sites and have had friends who’ve never been interested in biology ask me more about my work because of this photo. To me, this image represents the simple pleasure of finding something beautiful when you don’t expect to, and it shows how easy it is to connect science with new audiences by simply clicking ‘share.’” Meredith Wright, Princeton University.

Illustration and Graffiti by Remo Lienhard.

Sat, 11 May 2013 16:00:24 -0400

Illustration and Graffiti by Remo Lienhard.

“These three images are snapshots of a spark-ignited...

Sat, 11 May 2013 08:00:07 -0400

“These three images are snapshots of a spark-ignited expanding flame in different environments of the same hydrogen-air mixture. The top flame shows the ideal, reference case of a stable, smooth flame surface in a quiescent environment at atmospheric pressure. The middle flame is taken under elevated pressure simulating that within an internal combustion engine. The bottom flame is taken in a highly turbulent environment simulating another aspect of the engine interior. All images were taken at 8000 frames per second, using schlieren photography. The radius of the top flame is 11.4 millimeters.” C.K. Law, Swetaprovo Chaudhuri, and Fujia Wu (Princeton University).