compoundchem:

I’ve received a number of questions asking about the chemical compounds present in cigarette smoke, and their effects on the body. So, here’s a handy chart, summarising some of the major players. Bear in mind this is just a small selection of the huge number of compounds in cigarettes - I couldn’t fit all 7,357 on! Read more about the compounds included here: http://wp.me/p4aPLT-eM

compoundchem:

I’ve received a number of questions asking about the chemical compounds present in cigarette smoke, and their effects on the body. So, here’s a handy chart, summarising some of the major players. Bear in mind this is just a small selection of the huge number of compounds in cigarettes - I couldn’t fit all 7,357 on! Read more about the compounds included here: http://wp.me/p4aPLT-eM

toobgnabdoolb asked
As an expert in chemistry, do you have any insight on the potential health risks of the chemicals that make up "e-liquid"? The most common "ingredients" are propylene glycol, vegetable glycerin along with artificial flavors and, occasionally, some dyes. There is a big debate among people ignorant to chemistry about whether or not these ingredients are safe to use. Any insight would be appreciated :)

compoundchem:

Firstly, +1 for flattery - though the great thing about chemistry (and science in general, for that matter) is that there’s always plenty more to learn, so even as a chemistry teacher I still wouldn’t call myself an expert!

To be clear, the fact that the e-liquids used in e-cigarettes still aren’t regulated means that there’s no catch-all list of ingredients or effects - these will vary from brand to brand. However, there are a few common inclusions.

Propylene glycol (below) is used to draw in moisture/water vapour. It’s an FDA approved food additive considered safe for oral intake, and causes the visible fume during exhalation. However, some research has shown that inhalation can cause respiratory irritations in some

Glycerin (below) is an alternative used in combination or instead of propylene glycol. It’s considered by the FDA to be safe.

Obviously nicotine being present is a given; however, research has also found small amounts of nitrosamines, carcinogenic compounds found in tobacco and tobacco smoke, in several different e-liquids. In another study, two types of nitrosamines were detected in 9 out of 12 e-liquid brands. It is worth noting that this study also clarified that the levels of these toxicants were 9-450 times lower than in normal cigarette smoke.

Regulation for e-cigarettes as medicinal products is expected to come into force in 2016 - this regulation will be designed to ensure the chemical composition is known, and will improve the variable quality of different brands currently available.

Hope that answers your question!

Silence is the wall, Music is the Painting that colors our existence which we use to guide us as we navigate life.

by Daniel Griswold

fuckyeahfluiddynamics:

Every year Chicago dyes its river green in honor of St. Patrick’s Day. This timelapse video shows this year’s dyeing, including several passes from a boat distributing the green dye. The color is remarkably slow to diffuse. The boat’s passage does little to affect the motion of the dye already in the river. This is because the boat mainly disturbs the surface and most of the color comes from dye spread throughout the water. It’s like if you tried to stir milk into your coffee just by tapping the surface with your spoon. Instead, the slower, large-scale turbulent motion of the river distributes the dye. For more St. Patrick’s Day physics, be sure to check out Guinness physics and why tapping a beer makes it foam. (Video credit: P. Tsai; submitted by Bobby E.)

funnyand:

This is Progress or is it?Watching a movie, Contacting people, Reading the news, Listening to music, Working on stuff, goofing off!!…

funnyand:

This is Progress or is it?

Watching a movie, Contacting people, Reading the news, Listening to music, Working on stuff, goofing off!!…

It is not how you handle the best of situations but the worst that defines you as a person.

Perhaps it’s impossible to wear an identity without becoming what you pretend to be.