The-sleepy-chemist - Where Science-y Things Are Posted

I Recently read About these amazing glow in the dark creatures in the newspapers and thought it was worth sharing 1. Saprobe Panellus Stipticus, Fungi:

Found in Asia, Australia, Europe and North America, the bio-luminescence emitted by the Saprobe fungi that grows on decaying wood...

Beautiful Winged Insects Made of Discarded Circuit Boards by Julie Alice Chappell

KISS OF DEATH

One of the reasons cancer is so hard to defeat is that the body’s immune system has trouble recognizing cancer cells growing among healthy cells. Some scientists want to help. Researchers designed mouse T cells to specifically bind to a protein complex on fibrosarcoma MC57 tumor cell membranes. In this sped-up video, once the T cells (each about 10 μm across) meet their targets, they create holes in the cancer cell membranes using a protein called perforin. Next, the immune cells flood the pierced cells with a rush of cell-killing granules called granzymes. Propidium iodide, a dye the scientists added to the plate of cells, also squeezes in through the hole and starts glowing red when it comes in contact with RNA and DNA inside the cancer cells. This tells the researchers that the cells have been pierced and will soon die. This process takes about 75 minutes in real time.

Credit: Misty Jenkins (Read the paper.)

Related C&EN content:

The Immune System Fights Back

Cancer-Killing Machine

COFFEE STAIN UNDER A MICROSCOPE

Vin Kitayama, an artist and environmental researcher, created this image from something fairly mundane: an evaporating drop of espresso. Kitayama placed the drop on a microscope slide and then snapped pictures through a polarized light microscope at 4× magnification. As the coffee dried, solid compounds that were dissolved in the coffee, such as caffeine and chlorogenic acid, started forming small crystals. In the polarized light, these crystals shimmered different colors. The image won 9th place in the Nikon Small World photomicrography competition.

Credit: Vin Kitayama

More Chemistry in Pictures and C&EN content:

U.S. Senators Push for Ban on Caffeine Powder

Caffeinated Cocrystals

Tweaking Coffee’s Flavor Chemistry

Drugs Under The Microscope

Roses are red Your titriant is pink You failed Go throw your diploma in the sink

Roses are redYour titrant is pinkYou’re not within 2% of the actual valueYou automatically drop a full letter grade on this assignment because achem is a bitch

This Week in Chemistry: Treating cataracts, LED preservatives, nitrogen glaciers, and more! http://goo.gl/56bcZu

The Tsars’s vodka in action. Aqua regia or Царская водка in Russian is a 3/1 mixture of hydrochloric acid and nitric acid.

Upon mixing concentrated hydrochloric acid and concentrated nitric acid a chemical reactions occurs. The product of the reaction is nitrosyl chloride and chlorine as evidenced by the fuming nature and characteristic yellow color of aqua regia. In this case the dissolved copper and other transition metals turned the color of the solution deep green, but the gas over the solution is yellow from the chlorine and nitrous fumes.

Interesting fact about the Nobel prize and the dissolution of gold:

When Nazi Germany occupied Denmark from April 1940, during World War II, György de Hevesy dissolved the gold Nobel Prizes of Max von Laue and James Franck with aqua regia; it was illegal at the time to send gold out of the country, and were it discovered that Laue and Franck had done so to prevent them from being stolen, they could have faced prosecution in Germany. He placed the resulting solution on a shelf in his laboratory at the Niels Bohr Institute. After the war, he returned to find the solution undisturbed and precipitated the gold out of the acid. The Nobel Society then recast the Nobel Prizes using the original gold.

George de Hevesy got his Noble Prize in Chemistry for ”for his work on the use of isotopes as tracers in the study of chemical processes” in 1943.

Max von Laue got his Nobel Prize in Physics for ”for his discovery of the diffraction of X-rays by crystals” in 1914.

James Franck got his Nobel Prize in Physics ”for his discovery of the laws governing the impact of an electron upon an atom” in 1925.

nem sirok csak 65ezren belementek a szemembe

A crowd of 65,000 sings ‘Bohemian Rhapsody’ perfectly while waiting for a Green Day concert

High Current/Amps through metal

Any metal that can conduct low voltage / high amperage electricity acts as a resistor between two electrode wires (as in the case above), which are made out of copper, which has a better conductivity than iron/steel which heats up due to the extreme electrical resistance. 

Copper (Cu):

Resistivity: ρ(Ω·m) at 20ºC = 1.68×10−8

Conductivity: σ (S/m) at 20ºC = 5.96×107 

Temp. Coefficient:  0.003862 (K−1)

Iron (Fe): (although what you see in the gif is steel, iron comes pretty close)

Resistivity: ρ(Ω m) at 20ºC = 1.00×10−7

Conductivity: σ (S/m) at 20ºC = 1.00×107

Temp. Coefficient: 0.005 (K−1)

Giffed by: rudescience  From: This video