Professor: *clips on shades like a boss* Brady: *giggle* Professor: "What? ... What What?" It's the fact that he was asking "what" that made me laugh the most. ^_^ The Professor is awesome!
Temperature doesn't directly affect how quickly you burn. Theoretically, I could get sunburned here in winter. I'd freeze long before that happens, of course, but it's still possible. :)
did you know that titanium diokside used in sunscreens makes singlet oxgen? What I want to say is TiO2 protect your skin from UV, but splits oxgen to two atoms that are so much reactiv that it's reacting with skin. In this case some sunscreens have antioxgens. They are supposed to catch singlet oxgen. (I'm so sorry for my lenguage, but I'm not nativ speeker. I'm still working on my english!:) )
The professor mentioned zinc oxide and titanium dioxide as being the small particles that scatter light, but what are the organic compounds that he talked about? Thanks :D good work by the way
@fegolem the molecules chosen are particular ones: they adsorb a photon in the UV field and then they goes "thermal relaxation": they emit the energy in in the IR. You can observe by yourself that when you put the creme on your skin becomes more hot. After a few minutes you can't anymore tell the difference because you're under the sun.
the chemical used to scatter light usually is titanium dioxide,it's quite inert and the absorption by the skin is minimal,the compound used to keep the titanium dioxide is oily with an long organic chain,it reduces the loss of titanium dioxide and hydrates the skin,which allows you to stay more time in the sun,there's zinc for one simple reason,titanium dioxide may cause diseases on the long range,zinc on the long range only affects the skin,causing dermatitis with long exposure
@tubester4567 The temperature plays a negligible effect on the burning. UV is creating the burns, not the heat of the air. Nobody will literally bake their skin in 40 °C air.
@iasedu I'm not here to argue whether Vit. D is good or not, but you don't need to spend long in the sun to synthesise enough. A 10 minute walk on a sunny day is enough, and nowhere near long enough to cause damage.
@Eringuy13 Barium. Even there, the horizon is hazy. Seems no matter where you are, even if up above appears blue, the horizon is always progressively white
@Deizelcore Agreed. If Brady or the University wish to capitalize on anything, they need to market the professor and his clip-on shades 3/4 sleeved t-shirts. I would own 4.
This is probably true, unless you're very, very fair in a very sunny place. Generally speaking, all the stuff we tend to do in sunny places - swimming, running, sweating - reduce the efficacy of your sunscreen. That means a thing like how often you're re-applying will be way more important to your likelihood of burning than the SPF factor of your lotion. Note that this advice applies to normal activity in normal sun, not to Irish people visiting the tropics, which I don't generally recommend.
Most moles are unlikely to change into a malignant melanoma. Malignant melanoma change rapidly, which is why it is important to keep an eye on your moles, especially those which may have appeared recently. Remember the mnemonic: ABCDE Asymmetry Borders (irregular) Color (variegated), and Diameter (greater than 6 mm (0.24 in), about the size of a pencil eraser) Evolving over time
he's not really saying that, he said "green pigment", which is just another way of saying chlorophyll, which is green, because as you say it reflects green light. But he's not implying it absorbs specifically green light.
@hervva I never knew that, really interesting. Plus your English is really good dont stress about the silent e or anything too much, they say that's one of the hardest things to learn
If this is infact true, about light scattering I would like to see you guys aim a focused beam of Uv light (visible) if possible onto sunblock and lets see what happens. (I imagine Visible Uv is plausible since there are ways in which to see infrared light through filters) Thanks and Thumbs up so they see this.
SPF 30+ has a protection factor higher than 30. So saying 30+ is lower than 40+ is not technically correct. In Australia sunscreen can only be advertised as 50+ even if it has an SPF of 100 or 1000. This is to stop consumers incorrectly thinking SPF 100 labelled cream is twice as strong as the SPF 50 cream and only using half as much. Up till last year regulations stipulated SPF 30+ as the maximum allowable claim. This meant Australian 30+ cream was sold overseas as 50+.
In general, it's an expression of how long it takes to get a sunburn with the lotion vs. without - an SPF factor of 30 suggests it's around 30 times as long, but this only functions under ideal conditions - that is, when a test subject is at rest and exposed to an artificial light source of constant intensity. It doesn't factor changing intensity of UV exposure over time, nor does it factor in stuff like UVA exposure (because it's UVB that causes burning). Ultimately, SPF isn't very scientific.
.... when he walks in the lab, this is what he sees, everybody stops and starrin at him, hes got periodic tables on his ties and he aint afraid to show it...
his hair does have the sun screen factor +awesome... that's an awful lot better than +30. and the properties are much like the sugar. one hair's transparent...
That's not a dandelion, that's extra surface extending into his brain. It helps with information retention as well as boosting your cool points by about 9001.
he should have mentioned that UV-light can split up DNA, which in most cases kills the cells, but in some cases proteins fix it and make mistakes while fixing it, causing point-mutations that then go on to cause cancer. I had severe sunburns on my shoulder/back occasionally as a child, and now i have plenty of dark spots there, moles/melanoma, they are not cancer but could turn into cancer, all small and flat, but i need to check and if anyone starts growing then i have it surgically removed.
OMG~ i went to the beach a day before yesterday~~ i got skin burn even with 3 layers of sunscreen on!!! btw i live in sydney~~ the beach i went to was manly beach~~
5:40 may be it's ok to say for chemistry professor, but not in physics. Color of plants is reflection of lights.. so PLANTS DO NOT ABSORB GREEN, IT"S REFLECT GREEN LIGHT !!! The reason green shows up is because green light is mostly reflected.
I wonder wether the Professor's hair do scatter the light or gather it (like the fur of a polar bear). Anyway, I envy the Professor for his hair and hair style.^^
Yeah this is how he rolls. Chemistry print tie, out of control. It's Martyn with the big ass 'fro, and like Bunsen he rocks the lab, yo! Girl look at that molecule. Girl look at that molecule. Girl look at that molecule. I geek out!
SPF>30 is now prohibited in europe, because no sunscreen gives you total protection. You also didn't tell anything about the most interesting photochemical reaction in our skin which is synthesis of vitamin D, I think by degradation of some precursor molecule.
@odaymustdie then white sunscreen would stand out even more for you i suppose, however i think he simply had too much sunscreen in one place and that's why it wasn't absorbed by his skin.
"It says sport, not entirely my scene..."
Haha, I love The Professor.
0:00 - 0:04 is one of my favorite parts of this video.
Professor: *clips on shades like a boss*
Brady: *giggle*
Professor: "What? ... What What?"
It's the fact that he was asking "what" that made me laugh the most. ^_^ The Professor is awesome!
Never without a tie.
Long sleeves and a vest on a beach!? He is truly a mad scientist
This guy is just science in human form, he truly is a legend
Thug life
1:40 he put on enough for half his arm.
What I'd like to know is, if UV is absorbed, into what does it convert? What happens to the energy contained in the UV photons?
Temperature doesn't directly affect how quickly you burn. Theoretically, I could get sunburned here in winter. I'd freeze long before that happens, of course, but it's still possible. :)
By the huge amount of cream he put on his hand, you can tell its his first time on a beach XD
did you know that titanium diokside used in sunscreens makes singlet oxgen? What I want to say is TiO2 protect your skin from UV, but splits oxgen to two atoms that are so much reactiv that it's reacting with skin. In this case some sunscreens have antioxgens. They are supposed to catch singlet oxgen. (I'm so sorry for my lenguage, but I'm not nativ speeker. I'm still working on my english!:) )
The professor mentioned zinc oxide and titanium dioxide as being the small particles that scatter light, but what are the organic compounds that he talked about? Thanks :D good work by the way
@fegolem
the molecules chosen are particular ones: they adsorb a photon in the UV field and then they goes "thermal relaxation": they emit the energy in in the IR. You can observe by yourself that when you put the creme on your skin becomes more hot. After a few minutes you can't anymore tell the difference because you're under the sun.
the chemical used to scatter light usually is titanium dioxide,it's quite inert and the absorption by the skin is minimal,the compound used to keep the titanium dioxide is oily with an long organic chain,it reduces the loss of titanium dioxide and hydrates the skin,which allows you to stay more time in the sun,there's zinc for one simple reason,titanium dioxide may cause diseases on the long range,zinc on the long range only affects the skin,causing dermatitis with long exposure
You are seriously cool professor!! Good luck from Denmark
Who did his perm? I love it!
0:01 ... shit just got real
@tubester4567 The temperature plays a negligible effect on the burning. UV is creating the burns, not the heat of the air. Nobody will literally bake their skin in 40 °C air.
Professor and Brady, can you make a video specifically about what you specialize in Chemistry?
How was this not in the news, and yet when someone like paris hilton was at Bondi, everyone knew...
His students are future Nobel prize winners. Guaranteed.
I loved that camera rotation around the Prof's face. Almost like an action movie.
@iasedu I'm not here to argue whether Vit. D is good or not, but you don't need to spend long in the sun to synthesise enough. A 10 minute walk on a sunny day is enough, and nowhere near long enough to cause damage.
I love that tie!
@iasedu Give us some references to support that point. Wikipedia (I checked english and italian) still says vitamin D is synthesized in the skin.
@Eringuy13 Barium. Even there, the horizon is hazy. Seems no matter where you are, even if up above appears blue, the horizon is always progressively white
I’ve seen prof at the beach a ton but never in the water in a Speedo
I love you Professor!
I heard that a too high of an SPF factor, such as a 40 or more, would not be much more effective than something like a 30 SPF. Is this true?
@Deizelcore Agreed. If Brady or the University wish to capitalize on anything, they need to market the professor and his clip-on shades 3/4 sleeved t-shirts. I would own 4.
This is probably true, unless you're very, very fair in a very sunny place. Generally speaking, all the stuff we tend to do in sunny places - swimming, running, sweating - reduce the efficacy of your sunscreen. That means a thing like how often you're re-applying will be way more important to your likelihood of burning than the SPF factor of your lotion. Note that this advice applies to normal activity in normal sun, not to Irish people visiting the tropics, which I don't generally recommend.
Thank you Brady!
You just blew my mind.
Most moles are unlikely to change into a malignant melanoma. Malignant melanoma change rapidly, which is why it is important to keep an eye on your moles, especially those which may have appeared recently.
Remember the mnemonic: ABCDE
Asymmetry
Borders (irregular)
Color (variegated), and
Diameter (greater than 6 mm (0.24 in), about the size of a pencil eraser)
Evolving over time
Should people with only very light or pale skin use sunscreen?
he's not really saying that, he said "green pigment", which is just another way of saying chlorophyll, which is green, because as you say it reflects green light. But he's not implying it absorbs specifically green light.
THIS PROF. IS SUCH A FUCKING BOSS.
He is my new idol.
@hervva I never knew that, really interesting. Plus your English is really good dont stress about the silent e or anything too much, they say that's one of the hardest things to learn
"UV is absorbed..." What becomes of that energy? Heat / IR ?
If this is infact true, about light scattering I would like to see you guys aim a focused beam of Uv light (visible) if possible onto sunblock and lets see what happens. (I imagine Visible Uv is plausible since there are ways in which to see infrared light through filters) Thanks and Thumbs up so they see this.
3:56 I'm just going to pretend like he couldn't find the zoom function until later.
Why would plants be green if they absorbed it (the green wavelengths)?
SPF 30+ has a protection factor higher than 30. So saying 30+ is lower than 40+ is not technically correct.
In Australia sunscreen can only be advertised as 50+ even if it has an SPF of 100 or 1000. This is to stop consumers incorrectly thinking SPF 100 labelled cream is twice as strong as the SPF 50 cream and only using half as much.
Up till last year regulations stipulated SPF 30+ as the maximum allowable claim. This meant Australian 30+ cream was sold overseas as 50+.
@xja85mac Really? How come Avon is still selling sunscreens with SPF 50? :/
@RasmusLastname His grammar is correct, because you can make simple implications of the word "the", and the word "that" in simple sentences.
In general, it's an expression of how long it takes to get a sunburn with the lotion vs. without - an SPF factor of 30 suggests it's around 30 times as long, but this only functions under ideal conditions - that is, when a test subject is at rest and exposed to an artificial light source of constant intensity. It doesn't factor changing intensity of UV exposure over time, nor does it factor in stuff like UVA exposure (because it's UVB that causes burning). Ultimately, SPF isn't very scientific.
.... when he walks in the lab, this is what he sees, everybody stops and starrin at him, hes got periodic tables on his ties and he aint afraid to show it...
his hair does have the sun screen factor +awesome... that's an awful lot better than +30. and the properties are much like the sugar. one hair's transparent...
@HowlWolfieeee This channel is about Chemistry actually.
That's not a dandelion, that's extra surface extending into his brain. It helps with information retention as well as boosting your cool points by about 9001.
he should have mentioned that UV-light can split up DNA, which in most cases kills the cells, but in some cases proteins fix it and make mistakes while fixing it, causing point-mutations that then go on to cause cancer.
I had severe sunburns on my shoulder/back occasionally as a child, and now i have plenty of dark spots there, moles/melanoma, they are not cancer but could turn into cancer, all small and flat, but i need to check and if anyone starts growing then i have it surgically removed.
@MrBennyDiction I see the professor as an athlete back in the day for some reason...
I see him as a baseball player and/or track star for some reason.
You should do a video explaining the chemistry of photo-gray glasses :)
Where did you get that from?
@IkkakuDaKiller i know you have the right to speak what you want(or type in this case) but your got to realize that your not the only one here
@takcody he has one, because i have one. And something tells me it is impossible that i have a periodic table merchandise that he hasn't
Can anyone explain the number 30+ relating to chemistry?
OMG~ i went to the beach a day before yesterday~~ i got skin burn even with 3 layers of sunscreen on!!! btw i live in sydney~~ the beach i went to was manly beach~~
Looks like the professor is about to
0:00
Screen some sun.
YEEEAAAAAAAHHHHH!!!
i wish i had a tie like him its so classy.
5:40
may be it's ok to say for chemistry professor, but not in physics. Color of plants is reflection of lights.. so PLANTS DO NOT ABSORB GREEN, IT"S REFLECT GREEN LIGHT !!!
The reason green shows up is because green light is mostly reflected.
Re: UV and Sun, could you do an episode on Ozone please!?!?!
They don't absorb the green wavelengths, they reflect them because chlorophyll, which is what utilizes the suns energy, is green.
I ♥ Prof's tie!
@AbrahamLinky Here in Italy I've seen 50, if I'm not wrong, but that's probably on an entirely different scale :)
This guy is so damn cool!
Best explanation evar
i wanna be at that beach so bad ):
I wonder wether the Professor's hair do scatter the light or gather it (like the fur of a polar bear). Anyway, I envy the Professor for his hair and hair style.^^
Yeah this is how he rolls. Chemistry print tie, out of control. It's Martyn with the big ass 'fro, and like Bunsen he rocks the lab, yo! Girl look at that molecule. Girl look at that molecule. Girl look at that molecule. I geek out!
@AdorkableHippo
he was making a point.
he's awesome
Damn. Get me a ticket to a Australia That beach is beautiful.
@mistulac It bothered me that he's wearing a tie at the beach.
Yes. I, go overboard and use SPF 50+, though.
I think he said photochemical, not biochemical.
Yeah it is, there's (or was) a nation wide campaign saying "Slip slop slap". Slip on a shirt, slop on some sunscreen and I can't remember the 3rd one.
@darkdog4440 there's a pic on wikipedia...
What about vitamin D?
Those clip ons are, to be quite frank, fuckin' sick bro
this mans tie is awesome
@vampirica89 I'm wrong, sorry about that, go check out 2006/647/EC.
@xja85mac Cholesterol is that precursor. Sun + Cholesterol on skin makes Vitamin D.
Refreshing, considering that its 20 degrees F where im at....
SPF>30 is now prohibited in europe, because no sunscreen gives you total protection.
You also didn't tell anything about the most interesting photochemical reaction in our skin which is synthesis of vitamin D, I think by degradation of some precursor molecule.
Those first 10 seconds really need a YEEEEEEEEEEAAAAAAAAAAAHHHH overlay.
@odaymustdie then white sunscreen would stand out even more for you i suppose, however i think he simply had too much sunscreen in one place and that's why it wasn't absorbed by his skin.
we can mix TiO2 with creme, then try to sell them as suncreener
@calvintheninjaman
That mnemonic seems to be a good way to memorize it, thanks for sharing :)
Sweet tie! Dig the doo!
i like the sunscreen in robocop 2. awsome.
I got that beach some sunscreen. Beaches love sunscreen.
He said plants absorb light, not green light. And they are green because of the green pigments.
chill professor
Wow lmao. As the video started I just guessed bondi beach and they actually were there hahaha
this guy should hav a tv prog with james may..
Oh so in some way the sun screen is reflecting off the sun,this makes a lot sense especially since lighter colors reflect off light.
Of course, he knows everything.
im going to put LSD in my sunscreen, ill let you know if it works.