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ScienceSketch
United States
Registrace 8. 07. 2018
ScienceSketch brings to life science and technology through animation. The latest research discoveries and technical advances are highlighted using dynamic visuals and narration in simple language. The creators at ScienceSketch have a scientific background and are driven by their passion for scientific discovery and innovation. If you would like to see ScienceSketch videos, please subscribe.
Is Water Cremation in Your Future?
In the 21st century, the citizens of planet Earth are becoming more aware of their impact on the environment, particularly their carbon emissions in the form of CO2 and methane. But people are also becoming sensitive of their impact to the environment after death. How we dispose of human bodies is important. After all, we want to do it in a dignified and respectful manner that is consistent with spiritual beliefs. We also want to make sure that we aren’t harming the world in the process. Burial in graveyards uses precious land that could be used for other purposes. Cremation burns up a lot of fossil fuels and generates greenhouse gases which contribute to climate change. This video explores an alternative means of human body disposition which is gaining popularity. Water cremation, also known as resomation, aqua cremation, aquamation, or alkaline hydrolysis, breaks down the tissues in the body with water. Water cremation involves placing the body of the deceased in a hot alkaline solution in a steel pressure tank. Water cremation consumes less fossil fuels than flame cremation. It is estimated to have 75% to 90% lower carbon footprint. All that’s left at the end of the process are white, sterile bones which can be ground up and given to the family or returned to the earth. Many states in the U.S. have enacted legislation authorizing the use of water cremation, and several other states are considering legislation to do so. Is water cremation in your future?
zhlédnutí: 1 971
Video
The Fuel Cells Inside Us
zhlédnutí 256Před rokem
The chemical energy locked up in hydrogen is huge, and the combustion of hydrogen (i.e. the reaction between hydrogen and oxygen) has been used to power rocket engines. Hydrogen fuel cells also take advantage of the energy that is liberated when oxygen combines with hydrogen, but fuel cells do it stepwise resulting in a slower and more efficient source of power. The oxidative metabolism of nutr...
Stereochemistry R and S Rules
zhlédnutí 744Před rokem
Today ScienceSketch takes a deep dive into stereochemistry and how to assign R and S descriptors to stereocenters in organic compounds. First, we will define what stereoisomers and enantiomers are. We will review the conventions that are used to show three-dimensional structures on a two-dimensional piece of paper. And, most importantly, we will demonstrate why assigning stereochemistry is crit...
The chemical weapons we eat
zhlédnutí 667Před rokem
Over millions of years of natural selection, plants have developed chemical defenses to protect themselves from pathogenic microbes, hungry insects and vertebrates. In their fruit, leaves, and roots, plants produce a complex suite of molecules, called phytochemicals. These include many essential nutrients and have been the source of life-saving medicines. But often phytochemicals are toxic, bit...
Designed to smell or taste BAD
zhlédnutí 197Před 2 lety
The scent and flavor industry designs compounds which fill our nostrils with appealing aromas and our mouths with delicious flavors. But there’s a market for products that taste terrible and smell disgusting too. Several chemical companies thrive by manufacturing and selling stinky and/or bitter substances. It’s big business! In this video, we’ll review some of these nasty compounds-their histo...
Capillary action dissected
zhlédnutí 46KPřed 2 lety
Capillary rise in small tubes is a familiar phenomenon that most of us have seen. But why is it that water rises higher in thin tubes than in thick tubes? This animation will focus on the forces at work in capillary action and derive an equation from first principles known as Jurin’s Law. Enjoy! For further reading: en.wikipedia.org/wiki/Capillary_action hyperleap.com/topic/Jurin's_law chem.lib...
How do trees pump water?
zhlédnutí 47KPřed 2 lety
Trees absorb large quantities of water from the soil and transport it to the leaves where it supports cellular processes and photosynthesis, but most of the water pumped to the leaves evaporates into the air in a process called transpiration. How trees can pump vast amounts of water up to 30 meter high has been the subject of scientific inquiry since the 1890’s. This animation will delve into t...
What is the Delta Variant?
zhlédnutí 902Před 3 lety
The delta variant is gaining ground across the globe. It is the most transmissible strain of coronavirus so far, and it can evade antibodies against the original strain. The delta variant is causing an alarming rise in new cases even in nations with high vaccination rates. It has become the dominant strain in the UK and the US. The delta variant is sweeping across most of the continents of the ...
Are transition metals vital?
zhlédnutí 1,4KPřed 3 lety
Life evolved to take advantage of the unique properties of chemical elements. When we think about which ones are essential for life we usually go to carbon, hydrogen, and oxygen…maybe nitrogen, sulfur and phosphorus. But transition metals, found in the D block of the periodic table of the elements, must be included among the list of elements which are critical to many living systems including h...
NMR Spectroscopy Two
zhlédnutí 29KPřed 3 lety
This video builds on NMR Spectroscopy Visualized and discusses in greater depth several concepts which will help you to make the connection between molecular structure and the resulting NMR spectrum. Spin-spin coupling (J-coupling) is explored in depth with several examples provided. We will explain the difference between vicinal and geminal coupling and show examples of diastereotopic protons....
Renewable jet fuel. The quest for carbon neutral aviation.
zhlédnutí 2,7KPřed 3 lety
Many nations of the world have pledged to go carbon neutral by 2050, and some progress has been made already. One sector of our economy which poses a particularly vexing challenge is the aviation industry. Unlike cars, airliners cannot rely on batteries. They don’t provide enough energy for their weight. Solar panels on wings only provide enough power for the lightest demonstration aircraft. La...
The Birth of Cells at Hydrothermal Vents
zhlédnutí 15KPřed 3 lety
Hydrothermal vents in deep ocean rifts have generated a lot of excitement as the starting place for life on our planet. Hydrothermal vents represent a dynamic environment which would favor the formation of organic compounds, the “molecules of life,” using simple chemicals in the early oceans. Most recently, scientists have gained insight into the creation of the cell membrane-a structure common...
The Origin of Homochiral Life on Earth
zhlédnutí 4,1KPřed 3 lety
The building blocks that make up all living things on Earth are chiral. That is, they have the property of handedness. All amino acids, the building blocks of proteins are left-handed. Sugars like glucose and sucrose are right-handed. Even the sugars that form the backbone of DNA, deoxyribose, is right-handed. The uniformity of handedness is called homochirality. The observation that all life f...
Coronavirus RIBOTAC Destroys Viral RNA
zhlédnutí 1,1KPřed 3 lety
The world is gripped by a global pandemic caused by the proliferation of SARS CoV-2, the virus the causes COVID-19. Despite the promise of vaccines, we will continue to need antiviral drugs to treat patients who have contracted COVID-19. A lot of attention has gone to suppressing an overly aggressive immune response with dexamethasone or inhibiting one of the critical viral proteins such as RNA...
COVID-19 RNA vaccines and the critical role of lipid nanoparticles
zhlédnutí 100KPřed 3 lety
The world urgently needs a COVID-19 vaccine, but the traditional methods of developing a vaccine take many years. RNA vaccines (mRNA vaccines) represent an exciting new approach to discovering vaccines rapidly. However, the primary challenge with RNA vaccines is how to deliver RNA to the interior of immune cells. Nanotechnology to the rescue! Lipid nanoparticles are a critical component of RNA ...
Nanotechnology vs. chemistry. Is there a difference?
zhlédnutí 4,2KPřed 3 lety
Nanotechnology vs. chemistry. Is there a difference?
Remdesivir fights COVID-19. How does it work?
zhlédnutí 6KPřed 4 lety
Remdesivir fights COVID-19. How does it work?
Fast detection of COVID-19 virus, the discovery of a biosensor for SARS CoV-2
zhlédnutí 23KPřed 4 lety
Fast detection of COVID-19 virus, the discovery of a biosensor for SARS CoV-2
How to create the Orion spacecraft reentry using Moho Pro
zhlédnutí 452Před 4 lety
How to create the Orion spacecraft reentry using Moho Pro
How to create spheres and rods in 3D using Moho Pro.
zhlédnutí 968Před 4 lety
How to create spheres and rods in 3D using Moho Pro.
ScienceSketch MALDI-TOF Mass Spectrometry
zhlédnutí 1,7KPřed 4 lety
ScienceSketch MALDI-TOF Mass Spectrometry
Sorry but it would take an all-knowing God like in the book of Genesis to assemble and create the complexities for lefthanded DNA,(the bases of all life on earth) to exist !It's all back in Genesis.
preparing for the school olymp and finally found this video, tysm
Did Joaquin Phoenix narrate this? It sounds just like him!
Excellent
The key point is different protons have different chemical environment so experience different larmor frequency
This is amazing and finally makes more sense.
great video
Indeed, thank you very much 👌👌
Wonderfully explained; thank you. <3
광고1분
There could not be any better vedio than this for NMR. Thank you for making it..
thx
How does CO give rise to long chain carboxylic acids and alcohols?
Please refer to the references in the video description.
I came here because I was watching the anime “Dr. Stone” during a totally unrelated scene and I’m glad I did
Excellent explanation! Thank you so much!
So its a pressure cooker? Stew me up and feed me to the dogs!
That. Was. Amazing. Thank you. They did not teach me half of that in organic chemistry and I have always had questions to how this actually works.
Sir pl suggest how yo learn structure elucidation
Could you possibly explain why the deshielded proton has a higher frequency than the shielded one, but its Fourier transform peak is at a lower frequency than that of the shielded one? Many thanks.
Hi David, Thanks for your question. You're completely right: it seems wrong. The peaks to the left are actually higher frequency than those on the right. The X-axis in ppm goes UP as you go to the left and DOWN to zero as you go to the right. I know, this seems wrong and is in conflict with any other graph that you have seen. The X-axis of the NMR spectrum is expressed in ppm (parts per million). The chemical shift (the resonance frequency of a nucleus) is defined as the resonance frequency minus (the frequency of the instrument) divided by (the frequency of the instrument) times 1 million. Please see this reference: chem.libretexts.org/Courses/Western_Washington_University/Biophysical_Chemistry_(Smirnov_and_McCarty)/05%3A_Nuclear_Magnetic_Resonance_(NMR)_Spectroscopy_-_Introduction/5.03%3A_Chemical_shift_in_units_of_Hz_and_ppm
@@ScienceSketch That makes sense, many thanks for your detailed explanation (and for the videos).
agradecido de poder tener este tipo de videos tan informativos detallados y gráficos, gracias
Estoy agradecido por sus generosos comentarios.
Does this show that there is no possibility of a scientific explanation for afterlife?
The step from Formica acid to long chain fatty acids is missing! What’s the reaction?
The experiment demonstrates that water can be pulled up 3 meters, not 30 meters.
Such a thorough and clearly explained video. Thank you so much.
Thanks for sharing 🙏🏼
Really good explanation!
2pm Exercise Study one subject 2am 8pm
Hey! I was really confused about the spinning alignment of the nucleus in the presence and in the absence of B. Ur video gave me a good clarity about that Thank you so much 😃
Very good video
Thank you so much!!
a very good explanation, thank you!
thank you so much!!
Thank you I really appreciate your video, My Current project has me running past them And I Realize, I really have no idea what they are what they do.But now you help solve that in every way possible.Thank you very much appreciate it.
LIES, LIES, LIES. Why have u not pulled this BS down??
No way keep it
1:02 a small mistake to point out- g is not the gravitational constant rather G is, g is the acceleration due to gravity with the value 9.8ms^-2 and G has the value 6.67*10^-11 otherwise a good explanation
Brilliant explanation
Thank you so much
Very informative video, thanks. Do you have time to answer a question for me? I have a small vessel filled with water. A thin tube (1.5mm inner diameter) hangs an arbitrary distance below the surface and the top is attached to a valve that allows me to release ink into the water. When the valve is open, ink flows freely. When I close the valve, a vacuum is created at the top of the tube, so the flow of ink stops. However, through what I assume is capillary action, water from the vessel is pulled into the tube, apparently displacing ink, which then leaks into the vessel. This continues until all of the ink in the tube has leaked out. My question is, is there any way to prevent this leakage from happening? I cannot change the viscosity of either the ink or the water. The tube could be modified if that would help, but not to the extent of using a much larger diameter tube. I hope you find this question interesting and I'd be most appreciative if you can answer it. Thanks very much!
Hi Michael, that's a really interesting observation. The water and the ink are still in contact even though the valve at the top is closed. There is no flow through the tube. Nevertheless, there could be diffusion of the ink molecules into the water vessel and diffusion of the water into the tube holding the ink. Let's do a thought experiment...if you place a capillary tube in a beaker of water, you will get a rise of water up into the capillary tube until it reaches equilibrium. At that point, there is not net flow (i.e. the level of the water does not change). But you would expect that, due to random molecular motion, there would be exchange of the water molecules from the capillary tube into the beaker and vice-versa? I think the same thing is happening with your ink in the tube. Now, how to prevent it? I have no idea. Molecules diffuse!
@@ScienceSketch Thanks very much for your thoughtful reply. This sounds correct. I'm not sure why I thought capillary action would occur in a tube that's already full.
Could melted aluminum also use the equation? for example, melted aluminum adhere to non-melted aluminum?
None of the references support the wild claims of the video regarding long fatty acids and amphiphilic alcohols. No protocells have been created using this method. Pure misinformation and deceipt.
thank you thank you thank you so so so muchhhh
Great explanation
is there somewere from where i can borrow the animations?
Hi Amatista, you can show the video to anyone at anytime from CZcams.com You can also download videos from CZcams to your machine, but you have to comply with the copyright rules. Here are various ways to download videos: clipchamp.com/en/blog/download-youtube-videos/#:~:text=If%20you're%20wondering%2C%20%E2%80%9C,you%20in%20murky%20legal%20waters.
@@ScienceSketch omg thank u!
thank you so much sir for your amazing video, you explained much better than professor does.
0:25 You are comparing single objects (a table, and a chair) with 2 objects (2 sandals). Is that a valid comparison? If you bisect the chair using the plane you showed, then the 2 resulting objects would be chiral: non-superimposable mirror images of each other. On the other hand, if you took the two sandals and bonded them together side by side to make them a single object, then what resulted would have a plane of symmetry down the middle ... like the chair and table do.
Hi Tony, you are making a valid point: if you split the sofa into two parts, you get two chiral objects. Interesting! Also with the sandals. If you glom them together, you get a non-chiral object. In chemistry, if you bond two chiral molecules together, you get DIASTEREOMERS, not enantiomers. The point I was making at 0:25 was that there are a lot of symmetrical objects lying around, but not everything is symmetrical. The proper definition of chirality is at 1:02, and this states that an object and its mirror image may or may not be superimposable. If they are superimposable, then they are not chiral. If you take a sandal and make its mirror image, you will see that they are not superimposable and therefore chiral. Back to the sofa and chair. If you make a mirror image of C2 symmetric chair, the mirror image will be superimposable. They are not chiral. Same with a symmetrical sofa. The sofa and its mirror image are identical. They are not chiral either.
@@ScienceSketch I think you should have: 1) Taken the chair (or table) and, after showing it has an internal plane of symmetry, showed its mirror image, and shown that the two are superimposable. 2) Started with a single sandal - say the left one - and showed that it does not have an internal plane of symmetry, then showed that its mirror image - the right one - is non-superimposable on the left one.
1:54 - does this pulse have to be mached exactly to rotate the nuclei? Is it possible that in a given molecule some atoms that are strongly shielded / deshielded would be too far of the tune to be rotated by that RF pulse? Or simply the pulse contains a spectrum of frequencies and all nuclei will find matching tune to rotate?
Thanks for your question. You answered it in the last sentence. The short Rf pulse has a spectrum of frequencies and will excite all the nuclei.
Thank you so much! The video that makes me understand the topic the most so far🥰. I can't express how much I feel grateful for this🤩!
Wow
This was such a detailed and comprehensive explanation, just what I needed! Thanks!